TWI804892B - Optical imaging lens, imaging device and electronic device - Google Patents

Abstract

An optical imaging lens includes, from an object side to an image side, a first lens having negative refractive power and including an object-side surface being convex and an image-side surface being concave, a second lens having negative refractive power and including an object-side being convex and an image-side surface being concave, a third lens having negative refractive power and including an object-side surface being concave and an image-side surface being convex, an aperture, a fourth lens having positive refractive power and including an object-side surface being convex and an image-side surface being convex, a fifth lens having positive refractive power and including an object-side surface being convex and an image-side surface being convex, a sixth lens having negative refractive power and including an object-side surface being concave and an image-side surface being concave, and a seventh lens having positive refractive power and including an object-side surface being convex and an image-side surface being convex. The optical imaging lens includes a total of seven elements. When specific conditions are satisfied, the optical imaging lens could have a compact size, wide angle of view and good imaging qualities.

Description

Optical camera lens group, imaging device and electronic device

The present invention relates to an optical imaging lens group and an imaging device, in particular to an optical imaging lens group, an imaging device and an electronic device suitable for a vehicle photographing electronic device or a surveillance camera system.

As the semiconductor process technology continues to improve, the pixel size of the image sensing element can reach a smaller size, and the performance is significantly improved. Therefore, the optical lens with high imaging quality has become an indispensable part of the electronic camera device.

With the diversified development of electronic camera devices, their application scope is becoming more and more extensive, such as advanced driver assistance systems (ADAS), driving recorders, home surveillance camera equipment, smart phones and human-computer interaction devices, etc., the design of optical lenses Requirements are also more diverse. As far as the vehicle camera is concerned, in order to clearly identify obstacles around the vehicle or approaching vehicles on both sides, it is necessary to improve the resolution and brightness of the optical lens, and at the same time require a high degree of adaptability to the ambient temperature. In addition, in order to properly correct various aberrations, especially for distance measurement or object recognition purposes, if there is a large distortion aberration in the captured image, errors will easily occur when calculating distance or image recognition.

Therefore, how to provide a small optical lens with a wide viewing angle and good imaging quality has become a problem that people in this technical field want to solve urgently.

Therefore, in order to solve the above problems, the present invention provides an optical imaging lens group, which includes a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, and a sixth lens in sequence from the object side to the image side. lens and the seventh lens. Among them, the first lens has negative refractive power, its object side is convex, and its image side is concave; the second lens has negative refractive power, its object side is convex, and its image side is concave; the third lens has negative refractive power, its object The side is concave, and the image side is convex; the fourth lens has positive refraction power, its object side is convex, and the image side is convex; the fifth lens has positive refraction, its object side is convex, and the image side is convex; the sixth lens It has negative refractive power, its object side is concave, and its image side is concave; the seventh lens has positive refractive power, its object side is convex, and its image side is convex; wherein, the total number of lenses in the optical imaging lens group is seven; The focal length of the third lens is f3, and the effective focal length of the overall optical imaging lens group is EFL, which satisfies the following relationship: -10<f3/EFL<-2.

According to an embodiment of the present invention, the thickness of the second lens on the optical axis is CT2, and the thickness of the third lens on the optical axis is CT3, which satisfy the following relationship: 0.6<CT3/CT2<2.6.

Preferably, according to an embodiment of the present invention, the combined focal length of the third lens and the fourth lens is f34, and the effective focal length of the overall optical imaging lens group is EFL, which satisfies the following relationship: 3<f34/EFL< 7.

The present invention further provides an optical imaging lens group, which sequentially includes a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and a seventh lens from the object side to the image side. Among them, the first lens has negative refractive power, its object side is convex, and its image side is concave; the second lens has negative refractive power, its object side is convex, and its image side is concave; the third lens has negative refractive power, its object The side is concave, and the image side is convex; the fourth lens has positive refraction power, its object side is convex, and the image side is convex; the fifth lens has positive refraction, its object side is convex, and the image side is convex; the sixth lens It has negative refractive power, its object side is concave, and its image side is concave; the seventh lens has positive refractive power, its object side is convex, and its image side is convex; wherein, the total number of lenses in the optical imaging lens group is seven; The combined focal length of the third lens and the fourth lens is f34, and the effective focal length of the overall optical imaging lens group is EFL, which satisfies the following relationship: 3<f34/EFL<7.

Preferably, according to an embodiment of the present invention, the thickness of the second lens on the optical axis is CT2, and the thickness of the third lens on the optical axis is CT3, which satisfy the following relationship: 0.6<CT3/CT2< 2.6.

According to an embodiment of the present invention, the focal length of the first lens is f1, and the focal length of the second lens is f2, which satisfy the following relationship: 1<f2/f1<4.

According to an embodiment of the present invention, the combined focal length of the fifth lens and the sixth lens is f56, which satisfies the following relationship with the effective focal length EFL of the overall optical imaging lens group: 2<f56/EFL<6.5 .

According to an embodiment of the present invention, the radius of curvature of the image side of the sixth lens is R12, and the radius of curvature of the object side of the seventh lens is R13, which satisfy the following relationship: 0.4<R12/R13<1.4.

According to an embodiment of the present invention, the focal length of the fifth lens is f5, which satisfies the following relationship with the effective focal length EFL of the overall optical imaging lens group: 0.9<f5/EFL<1.8.

According to an embodiment of the present invention, the focal length of the seventh lens is f7, and the effective focal length EFL of the overall optical imaging lens group satisfies the following relationship: 1.5<f7/EFL<2.3.

＜0.6。 According to an embodiment of the present invention, the radius of curvature of the object side of the fourth lens is R7, and the radius of curvature of the image side is R8, which satisfy the following relationship: -0.9<

<0.6.

According to an embodiment of the present invention, the combined focal length of the first lens, the second lens, the third lens and the fourth lens is a negative value.

According to an embodiment of the present invention, the combined focal length of the first lens, the second lens and the third lens is f123, and the effective focal length EFL of the overall optical imaging lens group satisfies the following relationship: -1.3< f123/EFL<-0.6.

According to an embodiment of the present invention, the radius of curvature of the object side of the second lens is R3, and the radius of curvature of the image side is R4, which satisfy the following relationship: 1.4<R3/R4<2.3.

According to an embodiment of the present invention, the focal length of the fourth lens is f4, which satisfies the following relationship with the effective focal length EFL of the overall optical imaging lens group: 1.6<f4/EFL<3.3.

According to one embodiment of the present invention, the distance on the optical axis from the image side of the second lens to the object side of the third lens is AT23, and the distance on the optical axis from the object side of the first lens to the image surface of the optical imaging lens For TTL, the following relationship is satisfied: 5<TTL/AT23<14.

The present invention further provides an imaging device, which includes the aforementioned optical imaging lens group, and an image sensing element, wherein the image sensing element is arranged on the imaging surface of the optical imaging lens group.

The present invention further provides an electronic device, which includes the aforementioned imaging device.

In the following embodiments, each lens of the optical imaging lens group can be made of glass or plastic, and is not limited to the materials listed in the embodiments. When the lens material is glass, the lens surface can be processed by grinding or molding; in addition, because the glass material itself is resistant to temperature changes and high hardness, it can reduce the impact of environmental changes on the optical camera lens group, thereby prolonging the optical camera. The service life of the lens group. When the lens material is plastic, it is beneficial to reduce the weight of the optical camera lens group and reduce the production cost.

In an embodiment of the present invention, each lens includes an object side facing the subject and an image side facing the imaging plane. The surface shape of each lens is defined according to the shape of the surface near the optical axis (paraxial). For example, when describing the object side of a lens as a convex surface, it means that the object side of the lens near the optical axis is convex. , that is, although the lens surface is described as convex in the embodiments, the surface may be convex or concave in a region away from the optical axis (off-axis). The shape of each lens near the axis is judged by the positive or negative value of the radius of curvature of the surface. For example, if the radius of curvature of the object side of a lens is positive, then the object side is convex; otherwise, if the other If the radius of curvature is negative, the side of the object is concave. As far as the image side of a lens is concerned, if the radius of curvature is positive, the image side is concave; on the contrary, if the radius of curvature is negative, the image side is convex.

In an embodiment of the present invention, the object side and the image side of each lens may be spherical or aspheric surfaces. Using an aspheric surface on the lens helps to correct imaging aberrations of the optical camera lens group such as spherical aberration, and reduces the number of optical lens elements used. However, the use of aspheric lenses will increase the cost of the overall optical camera lens assembly. Although in the embodiments of the present invention, some optical lenses use spherical surfaces, they can still be designed as aspheric surfaces as required; or, some optical lenses use aspheric surfaces, but they can still be designed as aspheric surfaces as required. Design it as a spherical surface.

In an embodiment of the present invention, the total track length (TTL) of the optical imaging lens group is defined as the distance on the optical axis from the object side to the imaging plane of the first lens of the optical imaging lens group. The imaging height of this optical camera lens group is called the maximum image height ImgH (Image Height); when an image sensing element is set on the imaging surface, the maximum image height ImgH represents the length of the diagonal line of the effective sensing area of the image sensing element half. In the following embodiments, the units of the radius of curvature, lens thickness, distance between lenses, total lens group length TTL, maximum image height ImgH, and focal length (Focal Length) of all lenses are expressed in millimeters (mm).

The invention provides an optical imaging lens group, which sequentially includes a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and a seventh lens from the object side to the image side. Among them, the first lens has negative refractive power, its object side is convex, and the image side is concave; the second lens has negative refractive power, its object side is convex, and its image side is concave; the third lens has negative refractive power , the object side is concave and the image side is convex; the fourth lens has positive refraction power, its object side is convex and the image side is convex; the fifth lens has positive refraction power, its object side is convex and the image side is Convex; the sixth lens has negative refractive power, its object side is concave, and its image side is concave; the seventh lens has positive refractive power, its object side is convex, and its image side is convex; the lens of the optical imaging lens group The total is seven slices.

The first lens has a negative refractive power, and its object side is convex and its image side is concave, which helps to receive incident light at a large angle and expands the light collection range of the optical camera lens group.

The second lens has a negative refractive power, its object side is convex, and its image side is concave, which is beneficial to adjust the transmission path of incident light and reduce aberrations, and by continuously arranging two negative lenses at the front end of the optical camera lens group, it can The optical imaging lens group has an appropriate back focal length, so as to avoid excessively long back focal length, resulting in an increase in the total length of the entire optical imaging lens group, which is not conducive to miniaturization.

The third lens also has negative refractive power, the object side is concave, and the image side is convex. Since the concave image side of the second lens is arranged corresponding to the concave object side of the third lens, the traveling direction of light can be further adjusted, which is beneficial to reduce imaging aberration.

The fourth lens has positive refractive power, its object side is convex, and its image side is convex. By arranging the fourth lens with positive refractive power after the third lens, it is helpful to correct the field curvature aberration and spherical aberration of the optical camera lens group.

The fifth lens has positive refractive power, its object side is convex, and its image side is convex. The fifth lens provides the main positive refractive power of the optical camera lens group, and has the functions of converging light and adjusting the light path.

The sixth lens has negative refractive power, its object side is concave, and its image side is concave. The seventh lens has positive refractive power, its object side is convex, and its image side is convex. The imaging aberration can be effectively corrected by the arrangement of the fifth lens, the sixth lens and the seventh lens having positive, negative and positive refractive powers respectively.

The focal length of the third lens is f3, and the effective focal length of the overall optical camera lens group is EFL, which satisfies the following relationship:

-10<f3/EFL<-2; (1)

By satisfying the condition of the relational expression (1), the third lens can have an appropriate negative refractive power. If f3/EFL is lower than the lower limit of relational expression (1), the refractive power of the third lens is too low, and it is easy to shorten the focal length behind the optical camera lens group; if f3/EFL is higher than the upper limit of relational expression (1) , the refractive power of the third lens is too high, which is not conducive to the balanced distribution of the negative refractive power at the front end of the optical imaging lens group to the first lens, the second lens and the third lens.

Preferably, the thickness of the second lens on the optical axis is CT2, and the thickness of the third lens on the optical axis is CT3, which satisfy the following relationship:

0.6<CT3/CT2<2.6; (2)

By satisfying the condition of relational expression (2), the thicknesses of the second lens and the third lens can be controlled at an appropriate ratio.

The combined focal length of the third lens and the fourth lens is f34, and the effective focal length of the overall optical imaging lens group is EFL, which satisfies the following relationship:

3<f34/EFL<7; (3)

By satisfying the conditions of relation (3), the combination of the third lens and the fourth lens can have an appropriate positive refractive power, which is conducive to guiding the direction of light, making the light transmission path closer to the optical axis, and reducing imaging aberrations .

The focal length of the first lens is f1, and the focal length of the second lens is f2, which satisfy the following relationship:

1<f2/f1<4; (4)

By satisfying the condition of relation (4), the ratio of the refractive power between the first lens and the second lens can be controlled, so that the negative refractive power of the first lens is greater than the negative refractive power of the second lens, which is conducive to expanding the optical imaging lens The receiving range of the group.

The combined focal length of the fifth lens and the sixth lens is f56, which satisfies the following relationship with the effective focal length EFL of the overall optical imaging lens group:

2<f56/EFL<6.5; (5)

By satisfying the condition of relation (5), the combined focal length of the fifth lens and the sixth lens can be maintained at an appropriate ratio to the effective focal length EFL of the overall optical imaging lens group, which is beneficial to reduce the chromatic aberration of the optical imaging lens group. aberrations.

The radius of curvature of the image side of the sixth lens is R12, and the radius of curvature of the object side of the seventh lens is R13, which satisfy the following relationship:

0.4<R12/R13<1.4; (6)

By satisfying the condition of relation (6), the image side of the sixth lens and the object side of the seventh lens can be concave and convex, and the radius of curvature between the image side of the sixth lens and the object side of the seventh lens can be controlled to maintain Appropriate ratio helps to reduce field curvature aberration.

The focal length of the fifth lens is f5, which satisfies the following relationship with the effective focal length EFL of the overall optical imaging lens group:

0.9<f5/EFL<1.8; (7)

By satisfying the condition of relational expression (7), the ratio between the focal length of the fifth lens and the effective focal length EFL of the overall optical imaging lens group can be controlled and maintained in an appropriate range, which is conducive to reducing the volume of the optical imaging lens group while maintaining a good optical performance.

The focal length of the seventh lens is f7, which satisfies the following relationship with the effective focal length EFL of the overall optical imaging lens group:

1.5<f7/EFL<2.3; (8)

By satisfying the condition of the relational expression (8), the seventh lens can have an appropriate positive refractive power.

The radius of curvature on the object side of the fourth lens is R7, and the radius of curvature on the image side is R8, which satisfy the following relationship:

-0.9<(R7+R8)/(R8-R7)<0.6; (9)

By satisfying the condition of relational expression (9), the fourth lens can have an appropriate lens shape, which helps to correct the imaging aberration of the optical imaging lens group.

The combined focal length of the first lens, the second lens and the third lens is f123, which satisfies the following relationship with the effective focal length EFL of the overall optical imaging lens group:

-1.3<f123/EFL<-0.6; (10)

By satisfying the condition of relational expression (10), the combination of the first lens, the second lens and the third lens can have an appropriate size of negative refractive power, which helps to reduce the effective focal length and total length of the optical imaging lens group.

The radius of curvature on the object side of the second lens is R3, and the radius of curvature on the image side is R4, which satisfy the following relationship:

1.4<R3/R4<2.3; (11)

By satisfying the condition of relation (11), the ratio between the radius of curvature of the object side and the image side of the second lens can be controlled, which helps to receive and transmit the incident light from the first lens to reduce the imaging image Difference.

The focal length of the fourth lens is f4, which satisfies the following relationship with the effective focal length EFL of the overall optical imaging lens group:

1.6<f4/EFL<3.3; (12)

By satisfying the condition of the relational expression (12), the fourth lens can have an appropriate positive refractive power, and the fourth lens is arranged behind the third lens with negative refractive power, which helps to correct field curvature aberration.

The distance on the optical axis from the image side of the second lens to the object side of the third lens is AT23, and the distance on the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens is TTL, which satisfies the following relationship Mode:

5<TTL/AT23<14; (13)

By satisfying the condition of relational expression (13), it is helpful to control the total length of the optical imaging lens group, which is beneficial to the miniaturization of the lens group. first embodiment

Referring to FIG. 1A and FIG. 1B , FIG. 1A is a schematic diagram of an optical imaging lens group according to a first embodiment of the present invention. Fig. 1B is, from left to right, the diagram of Longitudinal Spherical Aberration, Astigmatism/Field Curvature and Distortion of the first embodiment of the present invention.

As shown in Figure 1A, the optical imaging lens group 10 of the first embodiment includes a first lens 11, a second lens 12, a third lens 13, an aperture ST, a fourth lens 14, a fifth lens 15 , sixth lens 16 and seventh lens 17 . The optical imaging lens group 10 can further include a filter element 18 and an imaging surface 19 . An image sensing element 100 can be further disposed on the imaging surface 19 to form an imaging device (not labeled otherwise).

The first lens 11 has a negative refractive power, its object side 11 a is convex, its image side 11 b is concave, and both its object side 11 a and image side 11 b are spherical. The material of the first lens 11 is glass.

The second lens 12 has a negative refractive power. The object side 12a is convex, the image side 12b is concave, and both the object side 12a and the image side 12b are aspherical. The material of the second lens 12 is plastic.

The third lens 13 has negative refractive power, the object side 13a is concave, the image side 13b is convex, and both the object side 13a and the image side 13b are aspherical. The material of the third lens 13 is plastic.

The fourth lens 14 has positive refractive power, its object side 14a is convex, its image side 14b is convex, and its object side 14a and image side 14b are both spherical. The material of the fourth lens 14 is glass.

The fifth lens 15 has positive refractive power, its object side 15 a is convex, its image side 15 b is convex, and its object side 15 a and image side 15 b are both aspherical. The fifth lens 15 is made of glass.

The sixth lens 16 has negative refractive power, its object side 16 a is concave, its image side 16 b is concave, and its object side 16 a and image side 16 b are both spherical. The material of the sixth lens 16 is glass.

The seventh lens 17 has positive refractive power, its object side 17 a is convex, its image side 17 b is convex, and both its object side 17 a and image side 17 b are aspherical. The material of the seventh lens 17 is plastic.

The filter element 18 is disposed between the seventh lens 17 and the imaging surface 19 to filter out light in a specific wavelength range, such as an infrared filter (IR Filter). The two surfaces 18a, 18b of the filter element 18 are both flat and made of glass.

The image sensor (Image Sensor) 100 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a Complementary Metal Oxide Semiconductor Sensor (CMOS Image Sensor).

The curve equations of the above-mentioned aspheric surfaces are expressed as follows:

Among them, X: the distance between the point on the aspheric surface whose distance from the optical axis is Y and the tangent plane of the aspheric surface on the optical axis;

Y: The vertical distance between the point on the aspheric surface and the optical axis;

R: radius of curvature of the lens at the near optical axis;

K: cone coefficient; and

Ai: i-th order aspherical coefficient.

Please refer to Table 1 below, which is the detailed optical data of the optical imaging lens assembly 100 according to the first embodiment of the present invention. Wherein, the object side 11a of the first lens 11 is marked as the surface 11a, and the image side 11b is marked as the surface 11b, and the other lens surfaces are deduced accordingly. The value in the distance column in the table represents the distance on the optical axis I from the surface to the next surface. For example, the distance from the object side 11a to the image side 11b of the first lens 11 is 0.5 mm, which means that the first lens 11 is on the optical axis. The thickness is 0.5mm. The distance from the image side 11b of the first lens 11 to the object side 12a of the second lens 12 is 0.489 mm. Others can be deduced in a similar manner, and will not be repeated below.

In the first embodiment, the effective focal length of the optical imaging lens group 10 is EFL, the aperture value (F-number) is Fno, half of the maximum viewing angle of the overall optical imaging lens group 10 is HFOV (Half Field of View), and its values are also listed in Table 1. first embodiment EFL= 1.68 mm, Fno = 2.17, HFOV = 95 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) material subject unlimited unlimited first lens 11a sphere 7.445 0.500 1.780 49.6 -5.14 Glass 11b sphere 2.522 0.489 second lens 12a Aspherical 3.178 0.422 1.541 56.0 -5.62 plastic 12b Aspherical 1.479 1.673 third lens 13a Aspherical -2.125 0.494 1.530 56.0 -9.20 plastic 13b Aspherical -4.085 0.146 aperture ST flat unlimited 0.000 fourth lens 14a sphere 7.417 0.711 1.918 31.3 4.92 Glass 14b sphere -10.756 0.367 fifth lens 15a Aspherical 4.615 1.502 1.780 49.6 2.61 Glass 15b Aspherical -3.104 0.197 sixth lens 16a sphere -5.560 0.367 1.972 17.9 -2.75 Glass 16b sphere 5.140 0.137 seventh lens 17a Aspherical 4.284 1.316 1.544 56.1 3.52 plastic 17b Aspherical -3.055 1.194 filter element 18a flat unlimited 0.210 1.517 64.2 Glass 18b flat unlimited 1.229 imaging surface 19 flat unlimited Reference wavelength: 550 nm Table I

Please refer to Table 2 below, which shows the aspheric coefficients of the surfaces of the lenses in the first embodiment of the present invention. Among them, K is the cone coefficient in the aspheric curve equation, and A ₂ to A ₁₆ represent the 2nd to 16th order aspheric coefficients of each surface. For example, the conic coefficient K of the object side surface 12a of the second lens 12 is -0.012. Others can be deduced in a similar manner, and will not be repeated below. In addition, the tables of the following embodiments are corresponding to the optical imaging lens groups of each embodiment, and the definitions of each table are the same as those of this embodiment, so they will not be repeated in the following embodiments. Aspheric coefficient of the first embodiment surface 12a 12b 13a 13b K -1.02E-02 -5.33E-01 -2.32E+00 -3.04E+01 A ₂ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A ₄ 4.37E-02 6.94E-02 8.18E-03 -2.83E-02 A ₆ -7.11E-03 1.40E-02 3.79E-03 3.58E-02 A ₈ -7.47E-04 -1.29E-02 1.97E-03 -9.53E-03 A ₁₀ 8.51E-05 2.58E-03 -1.80E-03 -2.42E-03 A ₁₂ -6.97E-09 0.00E+00 3.58E-05 3.03E-05 A ₁₄ 0.00E+00 0.00E+00 7.65E-05 1.97E-04 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 surface 15a 15b 17a 17b K -6.89E+00 -3.58E-01 -1.20E+01 1.36E-01 A ₂ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A ₄ 3.07E-03 1.61E-04 4.78E-03 1.96E-02 A ₆ -1.04E-03 1.68E-03 1.76E-03 8.93E-04 A ₈ 2.79E-04 -7.54E-05 -1.40E-04 5.22E-04 A ₁₀ 2.77E-05 1.57E-05 2.04E-05 -2.32E-05 A ₁₂ -9.40E-07 -2.27E-07 -1.28E-10 -7.52E-10 A ₁₄ 4.13E-07 0.00E+00 -4.27E-09 7.01E-11 A ₁₆ 0.00E+00 0.00E+00 -6.32E-09 1.81E-10 Table II

In the first embodiment, the relationship between the focal length f3 of the third lens 13 and the effective focal length EFL of the overall optical imaging lens group 10 is f3/EFL=-5.48.

In the first embodiment, the relationship between the thickness CT2 of the second lens 12 on the optical axis and the thickness CT3 of the third lens 13 on the optical axis is CT3/CT2=1.17.

In the first embodiment, the relationship between the combined focal length f34 of the third lens 13 and the fourth lens 14 and the effective focal length EFL of the overall optical imaging lens group 10 is f34/EFL=5.07.

In the first embodiment, the relationship between the focal length f1 of the first lens 11 and the focal length f2 of the second lens 12 is f2/f1=1.09.

In the first embodiment, the relationship between the combined focal length f56 of the fifth lens 15 and the sixth lens 16 and the effective focal length EFL of the overall optical imaging lens group 10 is f56/EFL=5.38.

In the first embodiment, the relationship between the radius of curvature R12 of the image side 16b of the sixth lens 16 and the radius of curvature R13 of the object side 17a of the seventh lens 17 is R12/R13=1.20.

In the first embodiment, the relationship between the focal length f5 of the fifth lens 15 and the effective focal length EFL of the overall optical imaging lens group 10 is f5/EFL=1.55.

In the first embodiment, the relationship between the focal length f7 of the seventh lens 17 and the effective focal length EFL of the overall optical imaging lens group 10 is f7/EFL=2.10.

= 0.18。 In the first embodiment, the relational expression between the radius of curvature R7 of the object side 14a of the fourth lens 14 and the radius of curvature R8 of the image side 14b is

= 0.18.

In the first embodiment, the combined focal length f1234 of the first lens 11 , the second lens 12 , the third lens 13 and the fourth lens 14 = -7.62.

In the first embodiment, the relationship between the combined focal length f123 of the first lens 11 , the second lens 12 and the third lens 13 and the effective focal length EFL of the overall optical imaging lens group 10 is f123/EFL=-1.04.

In the first embodiment, the relationship between the radius of curvature R3 of the object side 12a of the second lens 12 and the radius of curvature R4 of the image side 12b is R3/R4=2.15.

In the first embodiment, the relationship between the focal length f4 of the fourth lens and the effective focal length EFL of the overall optical imaging lens group 10 is f4/EFL=2.93.

In the first embodiment, the distance AT23 between the image side 12b of the second lens 12 and the object side 13a of the third lens 13 on the optical axis is the same as the distance AT23 between the object side 11a of the first lens 11 and the optical imaging lens group 10 The relational formula of the distance TTL of the imaging surface 19 on the optical axis is TTL/AT23=6.55.

It can be seen from the values of the above relational expressions that the optical imaging lens group 10 of the first embodiment satisfies the requirements of the relational expressions (1) to (13).

Referring to FIG. 1B , from left to right in the figure are the longitudinal spherical aberration diagram, the astigmatism field curvature aberration diagram and the distortion aberration diagram of the optical imaging lens group 10 . It can be seen from the longitudinal spherical aberration diagram that the three kinds of off-axis rays with wavelengths of 470nm, 550nm and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within + 0.02mm. From the astigmatism and field curvature aberration diagram (wavelength 550nm), it can be seen that the focal length variation of the sagittal direction aberration in the entire field of view is within + 0.02mm; The variation is within + 0.05mm; and the distortion aberration can be controlled within 15%. As shown in FIG. 1B , the optical imaging lens group 10 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system. second embodiment

Referring to FIG. 2A and FIG. 2B , FIG. 2A is a schematic diagram of an optical imaging lens group according to a second embodiment of the present invention. Fig. 2B is, from left to right, the diagram of Longitudinal Spherical Aberration, Astigmatism/Field Curvature and Distortion of the second embodiment of the present invention.

As shown in Figure 2A, the optical imaging lens group 20 of the second embodiment includes a first lens 21, a second lens 22, a third lens 23, an aperture ST, a fourth lens 24, a fifth lens 25 , sixth lens 26 and seventh lens 27 . The optical camera lens group 20 can further include a filter element 28 and an imaging surface 29 . An image sensing element 200 can be further disposed on the imaging surface 29 to form an imaging device (not labeled otherwise).

The first lens 21 has a negative refractive power, its object side 21 a is convex, its image side 21 b is concave, and both its object side 21 a and image side 21 b are spherical. The material of the first lens 21 is glass.

The second lens 22 has a negative refractive power. The object side 22a is convex, the image side 22b is concave, and both the object side 22a and the image side 22b are aspherical. The material of the second lens 22 is plastic.

The third lens 23 has negative refractive power, the object side 23a is concave, the image side 23b is convex, and both the object side 23a and the image side 23b are aspherical. The material of the third lens 23 is plastic.

The fourth lens 24 has positive refractive power, its object side 24 a is convex, its image side 24 b is convex, and its object side 24 a and image side 24 b are both spherical. The material of the fourth lens 24 is glass.

The fifth lens 25 has positive refractive power, its object side 25 a is convex, its image side 25 b is convex, and both its object side 25 a and image side 25 b are aspherical. The fifth lens 25 is made of glass.

The sixth lens 26 has negative refractive power, its object side 26 a is concave, its image side 26 b is concave, and its object side 26 a and image side 26 b are both spherical. The material of the sixth lens 26 is glass.

The seventh lens 27 has positive refractive power, its object side 27 a is convex, its image side 27 b is convex, and its object side 27 a and image side 27 b are both aspherical. The material of the seventh lens 27 is plastic.

The filter element 28 is disposed between the seventh lens 27 and the imaging surface 29 to filter out light in a specific wavelength range, such as an infrared filter (IR Filter). The two surfaces 28a, 28b of the filter element 28 are both flat and made of glass.

The image sensor (Image Sensor) 200 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a Complementary Metal Oxide Semiconductor Sensor (CMOS Image Sensor).

The detailed optical data and aspheric coefficients of the lens surface of the optical imaging lens group 20 of the second embodiment are listed in Table 3 and Table 4 respectively. In the second embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. second embodiment EFL= 1.99 mm, Fno = 2.35, HFOV = 95 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) material subject unlimited unlimited first lens 21a sphere 7.527 0.500 1.781 49.6 -5.15 Glass 21b sphere 2.534 0.557 second lens 22a Aspherical 2.533 0.300 1.540 55.6 -6.55 plastic 22b Aspherical 1.412 1.307 third lens 23a Aspherical -2.048 0.422 1.541 56.0 -11.76 plastic 23b Aspherical -3.246 0.269 aperture ST flat unlimited 0.000 fourth lens 24a sphere 18.773 0.602 1.864 23.8 6.29 Glass 24b sphere -7.421 0.271 fifth lens 25a Aspherical 4.384 1.261 1.780 49.6 2.33 Glass 25b Aspherical -2.684 0.241 sixth lens 26a sphere -4.768 0.500 1.972 17.9 -2.32 Glass 26b sphere 4.372 0.153 seventh lens 27a Aspherical 3.951 1.388 1.538 55.9 3.57 plastic 27b Aspherical -3.248 1.423 filter element 28a flat unlimited 0.210 1.517 64.2 Glass 28b flat unlimited 1.243 imaging surface 29 flat unlimited Reference wavelength: 550 nm Table three Aspheric coefficient of the second embodiment surface 22a 22b 23a 23b K -1.79E+00 -6.41E-01 -9.40E-01 -1.50E+01 A ₂ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A ₄ 2.28E-02 3.24E-02 -3.42E-03 -3.82E-02 A ₆ -7.68E-03 1.03E-02 3.25E-03 1.57E-02 A ₈ -1.51E-04 -1.03E-02 4.90E-03 7.99E-03 A ₁₀ 1.77E-04 1.73E-03 -8.74E-03 4.05E-02 A ₁₂ 8.58E-06 0.00E+00 7.16E-03 -8.60E-02 A ₁₄ 0.00E+00 0.00E+00 -1.59E-03 4.71E-02 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 surface 25a 25b 27a 27b K -7.00E+00 -5.77E-01 -9.93E+00 4.57E-01 A ₂ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A ₄ 3.57E-03 1.34E-03 4.28E-03 1.18E-02 A ₆ 4.69E-04 2.45E-03 1.59E-03 6.73E-04 A ₈ -5.32E-04 -4.26E-04 -2.59E-04 4.85E-04 A ₁₀ 3.49E-04 -2.20E-05 1.90E-05 -1.60E-05 A ₁₂ -2.87E-04 -1.67E-05 3.73E-07 1.10E-06 A ₁₄ 6.84E-05 0.00E+00 1.05E-07 -3.79E-08 A ₁₆ 0.00E+00 0.00E+00 -4.37E-08 -1.12E-07 Table four

In the second embodiment, the values of the relational expressions of the optical imaging lens group 20 are listed in Table 5. It can be seen from Table 5 that the optical imaging lens group 20 of the second embodiment satisfies the requirements of relational expressions (1) to (13). Relational value f3/EFL -5.91 CT3/CT2 1.41 f34/EFL 5.44 f2/f1 1.27 f56/EFL 4.12 R12/R13 1.11 f5/EFL 1.17 f7/EFL 1.79 (R7+R8)/(R8-R7) -0.43 f1234 -5.96 f123/EFL -1.02 R3/R4 1.79 f4/EFL 3.16 TTL/AT23 8.15 Table five

Referring to FIG. 2B , from left to right in the figure are the longitudinal spherical aberration diagram, astigmatism field curvature aberration diagram and distortion aberration diagram of the optical imaging lens group 20 . It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three kinds of visible light wavelengths of 470nm, 550nm and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within + 0.03mm. From the astigmatism and field curvature aberration diagram (wavelength 550nm), it can be seen that the focal length variation of the sagittal direction aberration in the entire field of view is within + 0.04mm; The variation is within + 0.03mm; and the distortion aberration can be controlled within 7%. As shown in FIG. 2B , the optical imaging lens group 20 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system. third embodiment

Referring to FIG. 3A and FIG. 3B , FIG. 3A is a schematic diagram of an optical imaging lens group according to a third embodiment of the present invention. Fig. 3B is, from left to right, the diagram of Longitudinal Spherical Aberration, Astigmatism/Field Curvature and Distortion of the third embodiment of the present invention.

As shown in Figure 3A, the optical imaging lens group 30 of the third embodiment includes a first lens 31, a second lens 32, a third lens 33, an aperture ST, a fourth lens 34, a fifth lens 35 , sixth lens 36 and seventh lens 37 . The optical camera lens group 30 can further include a filter element 38 and an imaging surface 39 . An image sensing element 300 can be further disposed on the imaging surface 39 to form an imaging device (not labeled otherwise).

The first lens 31 has negative refractive power, its object side 31 a is convex, its image side 31 b is concave, and both its object side 31 a and image side 31 b are spherical. The material of the first lens 31 is glass.

The second lens 32 has negative refractive power, its object side 32 a is convex, its image side 32 b is concave, and both its object side 32 a and image side 32 b are aspherical. The material of the second lens 32 is plastic.

The third lens 33 has negative refractive power, the object side 33a is concave, the image side 33b is convex, and both the object side 33a and the image side 33b are aspherical. The material of the third lens 33 is plastic.

The fourth lens 34 has a positive refractive power, its object side 34 a is convex, its image side 34 b is convex, and both its object side 34 a and image side 34 b are spherical. The material of the fourth lens 34 is glass.

The fifth lens 35 has a positive refractive power, its object side 35 a is convex, its image side 35 b is convex, and both its object side 35 a and image side 35 b are aspherical. The material of the fifth lens 35 is glass.

The sixth lens 36 has negative refractive power, its object side 36 a is concave, its image side 36 b is concave, and its object side 36 a and image side 36 b are both spherical. The sixth lens 36 is made of glass.

The seventh lens 37 has positive refractive power, its object side 37 a is convex, its image side 37 b is convex, and both its object side 37 a and image side 37 b are aspherical. The material of the seventh lens 37 is plastic.

The filter element 38 is disposed between the seventh lens 37 and the imaging surface 39 to filter out light in a specific wavelength range, such as an infrared filter (IR Filter). The two surfaces 38a, 38b of the filter element 38 are both flat and made of glass.

The image sensor (Image Sensor) 300 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a Complementary Metal Oxide Semiconductor Sensor (CMOS Image Sensor).

The detailed optical data and the aspheric coefficient of the lens surface of the optical imaging lens group 30 of the third embodiment are listed in Table 6 and Table 7 respectively. In the third embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. third embodiment EFL= 1.95 mm, Fno = 2.26, HFOV = 95 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) material subject unlimited unlimited first lens 31a sphere 7.467 0.500 1.813 46.6 -5.00 Glass 31b sphere 2.542 0.350 second lens 32a Aspherical 3.051 0.240 1.530 56.0 -6.85 plastic 32b Aspherical 1.609 1.375 third lens 33a Aspherical -2.250 0.589 1.530 56.3 -15.71 plastic 33b Aspherical -3.368 0.165 aperture ST flat unlimited 0.000 fourth lens 34a sphere 36.924 0.602 1.916 31.6 5.69 Glass 34b sphere -5.952 0.361 fifth lens 35a Aspherical 4.889 1.087 1.796 47.4 2.48 Glass 35b Aspherical -2.948 0.215 sixth lens 36a sphere -6.708 0.495 1.972 17.9 -2.55 Glass 36b sphere 3.985 0.228 seventh lens 37a Aspherical 5.017 1.388 1.536 56.0 3.86 plastic 37b Aspherical -3.157 1.167 filter element 38a flat unlimited 0.210 1.517 64.2 Glass 38b flat unlimited 1.245 imaging surface 39 flat unlimited Reference wavelength: 550 nm Table six Aspheric coefficient of the third embodiment surface 32a 32b 33a 33b K 1.15E+00 -7.03E-01 -7.96E-01 -1.32E+01 A ₂ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A ₄ 2.98E-02 5.98E-02 -4.81E-03 -3.50E-02 A ₆ -9.75E-03 1.66E-02 1.47E-03 2.19E-02 A ₈ -5.81E-04 -9.43E-03 3.90E-03 -3.28E-05 A ₁₀ 7.17E-05 1.99E-03 -1.82E-03 -2.29E-03 A ₁₂ -3.23E-06 0.00E+00 2.46E-05 9.85E-05 A ₁₄ 0.00E+00 0.00E+00 -5.28E-07 -1.98E-04 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 surface 35a 35b 37a 37b K -8.04E+00 -5.61E-01 -1.44E+01 3.50E-01 A ₂ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A ₄ 2.81E-03 1.36E-03 4.73E-03 1.39E-02 A ₆ 4.96E-04 2.09E-03 1.74E-03 7.84E-04 A ₈ -3.04E-04 -4.36E-04 -2.47E-04 4.58E-04 A ₁₀ 2.53E-05 1.80E-05 2.02E-05 -2.41E-05 A ₁₂ 4.24E-07 3.62E-07 -1.12E-07 -1.18E-07 A ₁₄ 8.98E-07 0.00E+00 -4.35E-08 -1.09E-08 A ₁₆ 0.00E+00 0.00E+00 1.36E-09 -9.88E-10 Table Seven

In the third embodiment, the values of the relational expressions of the optical imaging lens group 30 are listed in Table 8. It can be seen from Table 8 that the optical imaging lens group 30 of the third embodiment satisfies the requirements of relational expressions (1) to (13). Relational value f3/EFL -8.06 CT3/CT2 2.45 f34/EFL 3.88 f2/f1 1.37 f56/EFL 4.68 R12/R13 0.79 f5/EFL 1.27 f7/EFL 1.98 (R7+R8)/(R8-R7) -0.72 f1234 -11.82 f123/EFL -1.17 R3/R4 1.90 f4/EFL 2.92 TTL/AT23 7.43 table eight

Referring to FIG. 3B , from left to right in the figure are the longitudinal spherical aberration diagram, the astigmatism field curvature aberration diagram and the distortion aberration diagram of the optical imaging lens group 30 . It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three kinds of visible light wavelengths of 470nm, 550nm and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within + 0.04mm. From the astigmatism and field curvature aberration diagram (wavelength 550nm), it can be seen that the focal length variation of the sagittal direction aberration in the entire field of view is within + 0.03mm; The variation is within + 0.05mm; and the distortion aberration can be controlled within 5%. As shown in FIG. 3B , the optical imaging lens group 30 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system. Fourth embodiment

Referring to FIG. 4A and FIG. 4B, FIG. 4A is a schematic diagram of an optical imaging lens group according to a fourth embodiment of the present invention. Fig. 4B is, from left to right, the diagram of Longitudinal Spherical Aberration, Astigmatism/Field Curvature and Distortion of the fourth embodiment of the present invention.

As shown in Figure 4A, the optical imaging lens group 40 of the fourth embodiment includes a first lens 41, a second lens 42, a third lens 43, an aperture ST, a fourth lens 44, a fifth lens 45 , sixth lens 46 and seventh lens 47 . The optical camera lens group 40 can further include a filter element 48 and an imaging surface 49 . An image sensing element 400 can be further disposed on the imaging surface 49 to form an imaging device (not labeled otherwise).

The first lens 41 has a negative refractive power, its object side 41 a is convex, its image side 41 b is concave, and both its object side 41 a and image side 41 b are spherical. The material of the first lens 41 is glass.

The second lens 42 has a negative refractive power. The object side 42a is convex, the image side 42b is concave, and both the object side 42a and the image side 42b are aspherical. The material of the second lens 42 is plastic.

The third lens 43 has negative refractive power, the object side 43a is concave, the image side 43b is convex, and both the object side 43a and the image side 43b are aspherical. The material of the third lens 43 is plastic.

The fourth lens 44 has a positive refractive power, its object side 44a is convex, its image side 44b is convex, and both its object side 44a and image side 44b are spherical. The material of the fourth lens 44 is glass.

The fifth lens 45 has positive refractive power, its object side 45 a is convex, its image side 45 b is convex, and both its object side 45 a and image side 45 b are aspherical. The material of the fifth lens 45 is glass.

The sixth lens 46 has a negative refractive power, its object side 46 a is concave, its image side 46 b is concave, and both its object side 46 a and image side 46 b are spherical. The sixth lens 46 is made of glass.

The seventh lens 47 has a positive refractive power, its object side 47 a is convex, its image side 47 b is convex, and both its object side 47 a and image side 47 b are aspherical. The material of the seventh lens 47 is plastic.

The filter element 48 is disposed between the seventh lens 47 and the imaging surface 49 to filter out light in a specific wavelength range, such as an infrared filter (IR Filter). The two surfaces 48a, 48b of the filter element 48 are both flat and made of glass.

The image sensor (Image Sensor) 400 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a Complementary Metal Oxide Semiconductor Sensor (CMOS Image Sensor).

The detailed optical data and aspheric coefficients of the lens surface of the optical imaging lens group 40 of the fourth embodiment are listed in Table 9 and Table 10, respectively. In the fourth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. Fourth embodiment EFL= 1.98 mm, Fno = 2.13, HFOV = 89 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) material subject unlimited unlimited first lens 41a sphere 8.266 0.500 1.782 47.2 -4.90 Glass 41b sphere 2.537 0.783 second lens 42a Aspherical 3.494 0.510 1.541 56.0 -6.84 plastic 42b Aspherical 1.702 0.854 third lens 43a Aspherical -2.078 0.495 1.540 55.7 -17.76 plastic 43b Aspherical -2.878 0.100 aperture ST flat unlimited 0.000 fourth lens 44a sphere 32.374 0.713 1.894 39.2 6.24 Glass 44b sphere -6.616 0.693 fifth lens 45a Aspherical 4.896 1.207 1.810 45.5 2.26 Glass 45b Aspherical -2.582 0.279 sixth lens 46a sphere -4.741 0.563 1.972 18.0 -2.49 Glass 46b sphere 5.086 0.336 seventh lens 47a Aspherical 4.895 1.472 1.536 55.8 3.98 plastic 47b Aspherical -3.348 1.107 filter element 48a flat unlimited 0.210 1.517 64.2 Glass 48b flat unlimited 1.122 imaging surface 49 flat unlimited Reference wavelength: 550 nm Table nine The aspheric coefficient of the fourth embodiment surface 42a 42b 43a 43b K -1.87E+00 -1.19E+00 -5.10E-01 -1.13E+01 A ₂ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A ₄ 2.19E-02 3.98E-02 -1.27E-02 -4.80E-02 A ₆ -9.15E-03 6.53E-03 -4.53E-03 1.76E-02 A ₈ 2.35E-04 -2.21E-02 1.14E-02 1.80E-02 A ₁₀ 9.71E-05 2.00E-03 -5.16E-04 -6.36E-03 A ₁₂ 1.88E-05 0.00E+00 -8.41E-04 -6.28E-03 A ₁₄ 0.00E+00 0.00E+00 3.38E-04 5.99E-03 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 surface 45a 45b 47a 47b K -6.98E+00 -8.64E-01 -6.48E+00 1.68E-01 A ₂ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A ₄ 3.82E-03 3.86E-03 5.63E-03 1.73E-02 A ₆ 1.19E-03 2.77E-03 1.87E-03 8.59E-04 A ₈ 4.00E-05 -5.77E-04 -2.80E-04 4.39E-04 A ₁₀ 4.19E-05 2.23E-05 1.01E-05 -3.03E-05 A ₁₂ -1.78E-05 7.77E-05 -6.45E-07 -3.81E-06 A ₁₄ 1.55E-05 0.00E+00 1.97E-07 -7.28E-07 A ₁₆ 0.00E+00 0.00E+00 -2.80E-08 8.07E-08 table ten

In the fourth embodiment, the values of the relational expressions of the optical imaging lens group 40 are listed in Table 11. It can be known from Table 11 that the optical imaging lens group 40 of the fourth embodiment satisfies the requirements of relational expressions (1) to (13). Relational value f3/EFL -8.96 CT3/CT2 0.97 f34/EFL 4.17 f2/f1 1.40 f56/EFL 3.18 R12/R13 1.04 f5/EFL 1.14 f7/EFL 2.01 (R7+R8)/(R8-R7) -0.66 f1234 -6.93 f123/EFL -1.12 R3/R4 2.05 f4/EFL 3.15 TTL/AT23 12.82 Table Eleven

Referring to FIG. 4B , from left to right in the figure are the longitudinal spherical aberration diagram, the astigmatism field curvature aberration diagram and the distortion aberration diagram of the optical imaging lens group 40 . It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three visible light wavelengths of 470nm, 550nm and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within + 0.05mm. From the astigmatism and field curvature aberration diagram (wavelength 550nm), it can be seen that the focal length variation of the sagittal direction aberration within the entire field of view is within + 0.06mm; the meridian direction aberration within the focal length of the entire field of view The variation is within + 0.08mm; and the distortion aberration can be controlled within 6%. As shown in FIG. 4B , the optical imaging lens group 40 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system. fifth embodiment

Referring to FIG. 5A and FIG. 5B , FIG. 5A is a schematic diagram of an optical imaging lens group according to a fifth embodiment of the present invention. Fig. 5B is, from left to right, the diagram of Longitudinal Spherical Aberration, Astigmatism/Field Curvature and Distortion of the fifth embodiment of the present invention.

As shown in FIG. 5A, the optical imaging lens group 50 of the fifth embodiment includes a first lens 51, a second lens 52, a third lens 53, an aperture ST, a fourth lens 54, and a fifth lens in sequence from the object side to the image side. lens 55 , sixth lens 56 and seventh lens 57 . The optical imaging lens group 50 can further include a filter element 58 and an imaging surface 59 . An image sensing element 500 can be further disposed on the imaging surface 59 to form an imaging device (not otherwise labeled).

The first lens 51 has a negative refractive power, its object side 51 a is convex, its image side 51 b is concave, and both its object side 51 a and image side 51 b are spherical. The material of the first lens 51 is glass.

The second lens 52 has negative refractive power, its object side 52 a is convex, its image side 52 b is concave, and its object side 52 a and image side 52 b are both aspherical. The material of the second lens 52 is plastic.

The third lens 53 has a negative refractive power, the object side 53a is concave, the image side 53b is convex, and both the object side 53a and the image side 53b are aspherical. The material of the third lens 53 is plastic.

The fourth lens 54 has positive refractive power, its object side 54 a is convex, its image side 54 b is convex, and its object side 54 a and image side 54 b are both spherical. The material of the fourth lens 54 is glass.

The fifth lens 55 has a positive refractive power, its object side 55 a is convex, its image side 55 b is convex, and both its object side 55 a and image side 55 b are aspherical. The material of the fifth lens 55 is glass.

The sixth lens 56 has negative refractive power, its object side 56 a is concave, its image side 56 b is concave, and its object side 56 a and image side 56 b are both spherical. The sixth lens 56 is made of glass.

The seventh lens 57 has positive refractive power, its object side 57 a is convex, its image side 57 b is convex, and its object side 57 a and image side 57 b are both aspherical. The material of the seventh lens 57 is plastic.

The filter element 58 is disposed between the seventh lens 57 and the imaging surface 59 to filter out light in a specific wavelength range, such as an infrared filter (IR Filter). The two surfaces 58a, 58b of the filter element 58 are both flat and made of glass.

The image sensor (Image Sensor) 500 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a Complementary Metal Oxide Semiconductor Sensor (CMOS Image Sensor).

The detailed optical data and aspheric coefficients of the lens surface of the optical imaging lens group 50 of the fifth embodiment are listed in Table 12 and Table 13, respectively. In the fifth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. fifth embodiment EFL= 2.14 mm, Fno = 2.34, HFOV = 95 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) material subject unlimited unlimited first lens 51a sphere 12.566 0.500 1.772 48.5 -5.23 Glass 51b sphere 2.991 0.140 second lens 52a Aspherical 3.181 0.485 1.514 56.5 -8.08 plastic 52b Aspherical 1.705 1.279 third lens 53a Aspherical -2.030 0.499 1.542 55.9 -7.84 plastic 53b Aspherical -4.238 0.189 aperture ST flat unlimited 0.000 fourth lens 54a sphere 6.532 0.560 1.918 29.8 5.34 Glass 54b sphere -18.215 0.411 fifth lens 55a Aspherical 3.954 1.221 1.780 49.6 2.32 Glass 55b Aspherical -2.847 0.218 sixth lens 56a sphere -4.813 0.641 1.972 17.9 -2.51 Glass 56b sphere 5.089 0.275 seventh lens 57a Aspherical 5.108 1.375 1.544 56.1 3.76 plastic 57b Aspherical -3.057 1.270 filter element 58a flat unlimited 0.210 1.517 64.2 Glass 58b flat unlimited 1.255 imaging surface 59 flat unlimited Reference wavelength: 550 nm Table 12 Aspherical coefficient of the fifth embodiment surface 52a 52b 53a 53b K 2.68E-01 -7.11E-01 -1.05E+00 -2.01E+01 A ₂ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A ₄ 3.50E-02 6.35E-02 -2.96E-03 -3.26E-02 A ₆ -6.38E-03 9.88E-03 2.06E-03 2.07E-02 A ₈ -3.99E-04 -1.26E-02 4.75E-03 1.97E-03 A ₁₀ 9.10E-05 2.89E-03 -1.43E-03 -1.50E-03 A ₁₂ -1.64E-26 0.00E+00 2.03E-22 6.62E-23 A ₁₄ 0.00E+00 0.00E+00 -4.12E-27 -5.21E-28 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 surface 55a 55b 57a 57b K -8.36E+00 -5.59E-01 -1.08E+01 2.84E-01 A ₂ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A ₄ 2.66E-03 1.38E-03 5.00E-03 1.84E-02 A ₆ 4.68E-04 2.40E-03 1.73E-03 6.85E-04 A ₈ -2.70E-04 -4.01E-04 -2.43E-04 4.47E-04 A ₁₀ 2.64E-05 1.52E-05 2.03E-05 -2.37E-05 A ₁₂ -1.76E-24 2.26E-24 1.88E-26 -9.90E-08 A ₁₄ -4.48E-29 0.00E+00 3.64E-31 3.64E-31 A ₁₆ 0.00E+00 0.00E+00 3.85E-34 3.85E-34 Table 13

In the fifth embodiment, the values of the relational expressions of the optical imaging lens group 50 are listed in Table 14. It can be seen from Table 14 that the optical imaging lens group 50 of the fifth embodiment satisfies the requirements of relational expressions (1) to (13). Relational value f3/EFL -3.66 CT3/CT2 1.03 f34/EFL 5.70 f2/f1 1.54 f56/EFL 3.10 R12/R13 0.99 f5/EFL 1.08 f7/EFL 1.76 (R7+R8)/(R8-R7) 0.47 f1234 -6.04 f123/EFL -0.93 R3/R4 1.87 f4/EFL 2.50 TTL/AT23 8.23 Table Fourteen

Referring to FIG. 5B , from left to right in the figure are the longitudinal spherical aberration diagram, the astigmatism field curvature aberration diagram and the distortion aberration diagram of the optical imaging lens group 50 . It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three visible light wavelengths of 470nm, 550nm and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within + 0.05mm. From the astigmatism and field curvature aberration diagram (wavelength 550nm), it can be seen that the focal length variation of the sagittal direction aberration in the entire field of view is within + 0.04mm; The variation is within + 0.04mm; and the distortion aberration can be controlled within 13%. As shown in FIG. 5B , the optical imaging lens group 50 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system. Sixth embodiment

Referring to FIG. 6A and FIG. 6B , FIG. 6A is a schematic diagram of an optical imaging lens group according to a sixth embodiment of the present invention. Fig. 6B is, from left to right, the diagram of Longitudinal Spherical Aberration, Astigmatism/Field Curvature and Distortion of the sixth embodiment of the present invention.

As shown in FIG. 6A, the optical imaging lens group 60 of the sixth embodiment includes a first lens 61, a second lens 62, a third lens 63, an aperture ST, a fourth lens 64, and a fifth lens in sequence from the object side to the image side. lens 65 , sixth lens 66 and seventh lens 67 . The optical camera lens group 60 can further include a filter element 68 and an imaging surface 69 . An image sensing element 600 can be further disposed on the imaging surface 69 to form an imaging device (not labeled otherwise).

The first lens 61 has a negative refractive power, its object side 61 a is convex, its image side 61 b is concave, and both its object side 61 a and image side 61 b are spherical. The material of the first lens 61 is glass.

The second lens 62 has negative refractive power, its object side 62 a is convex, its image side 62 b is concave, and its object side 62 a and image side 62 b are both aspherical. The material of the second lens 62 is plastic.

The third lens 63 has negative refractive power, the object side 63a is concave, the image side 63b is convex, and both the object side 63a and the image side 63b are aspherical. The material of the third lens 63 is plastic.

The fourth lens 64 has positive refractive power, its object side 64 a is convex, its image side 64 b is convex, and its object side 64 a and image side 64 b are both spherical. The material of the fourth lens 64 is glass.

The fifth lens 65 has positive refractive power, its object side 65 a is convex, its image side 65 b is convex, and both its object side 65 a and image side 65 b are aspherical. The material of the fifth lens 65 is glass.

The sixth lens 66 has negative refractive power, its object side 66 a is concave, its image side 66 b is concave, and its object side 66 a and image side 66 b are both spherical. The sixth lens 66 is made of glass.

The seventh lens 67 has positive refractive power, its object side 67 a is convex, its image side 67 b is convex, and its object side 67 a and image side 67 b are both aspherical. The material of the seventh lens 67 is plastic.

The filter element 68 is disposed between the seventh lens 67 and the imaging surface 69 to filter out light in a specific wavelength range, such as an infrared filter (IR Filter). The two surfaces 68a, 68b of the filter element 68 are both flat and made of glass.

The image sensor (Image Sensor) 600 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a Complementary Metal Oxide Semiconductor Sensor (CMOS Image Sensor).

The detailed optical data and aspheric coefficients of the lens surface of the optical imaging lens group 60 of the sixth embodiment are listed in Table 15 and Table 16, respectively. In the sixth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. Sixth embodiment EFL= 2.36 mm, Fno = 2.43, HFOV = 95 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) material subject unlimited unlimited first lens 61a sphere 12.566 0.500 1.813 46.6 -4.56 Glass 61b sphere 2.797 0.300 second lens 62a Aspherical 4.116 0.426 1.541 56.0 -14.67 plastic 62b Aspherical 2.608 0.939 third lens 63a Aspherical -1.996 0.346 1.542 55.9 -6.66 plastic 63b Aspherical -4.765 0.329 aperture ST flat unlimited 0.000 fourth lens 64a sphere 6.694 0.849 1.918 31.3 4.67 Glass 64b sphere -10.920 0.313 fifth lens 65a Aspherical 4.052 0.814 1.782 49.6 2.54 Glass 65b Aspherical -3.509 0.189 sixth lens 66a sphere -8.226 0.705 1.972 17.9 -2.79 Glass 66b sphere 4.129 0.284 seventh lens 67a Aspherical 7.006 1.169 1.541 56.0 4.09 plastic 67b Aspherical -3.021 1.435 filter element 68a flat unlimited 0.210 1.517 64.2 Glass 68b flat unlimited 1.448 imaging surface 69 flat unlimited Reference wavelength: 550 nm Table 15 Aspheric Coefficient of the Sixth Embodiment surface 62a 62b 63a 63b K 2.92E+00 -1.46E+00 -1.13E+00 -3.34E+01 A ₂ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A ₄ 2.65E-02 5.42E-02 -1.23E-03 -2.88E-02 A ₆ -6.30E-03 6.53E-03 4.15E-03 2.70E-02 A ₈ -6.01E-04 -1.30E-02 4.38E-03 1.42E-03 A ₁₀ 4.30E-05 3.00E-03 -1.71E-03 -2.26E-03 A ₁₂ 5.28E-29 0.00E+00 1.59E-22 5.41E-23 A ₁₄ 0.00E+00 0.00E+00 -6.05E-27 -5.67E-28 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 surface 65a 65b 67a 67b K -9.02E+00 -3.88E-01 -6.86E+00 2.23E-01 A ₂ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A ₄ 3.35E-03 1.08E-03 5.48E-03 1.72E-02 A ₆ 4.57E-04 2.29E-03 1.77E-03 9.82E-04 A ₈ -2.69E-04 -3.86E-04 -2.44E-04 4.56E-04 A ₁₀ 3.25E-05 2.66E-05 2.05E-05 -2.37E-05 A ₁₂ -1.79E-24 2.26E-24 1.88E-26 -3.01E-07 A ₁₄ -4.44E-29 0.00E+00 3.64E-31 3.64E-31 A ₁₆ 0.00E+00 0.00E+00 3.85E-34 3.85E-34 Table 16

In the sixth embodiment, the values of the relational expressions of the optical imaging lens group 60 are listed in Table 17. It can be seen from Table 17 that the optical imaging lens group 60 of the sixth embodiment satisfies the requirements of relational expressions (1) to (13). Relational value f3/EFL -2.82 CT3/CT2 0.81 f34/EFL 4.56 f2/f1 3.22 f56/EFL 3.34 R12/R13 0.59 f5/EFL 1.08 f7/EFL 1.73 (R7+R8)/(R8-R7) 0.24 f1234 -8.14 f123/EFL -0.85 R3/R4 1.58 f4/EFL 1.98 TTL/AT23 10.93 Table 17

Referring to FIG. 6B , from left to right in the figure are the longitudinal spherical aberration diagram, the astigmatism field curvature aberration diagram and the distortion aberration diagram of the optical imaging lens group 60 . It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three visible light wavelengths of 470nm, 550nm and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within + 0.03mm. From the astigmatism and field curvature aberration diagram (wavelength 550nm), it can be seen that the focal length variation of the sagittal direction aberration in the entire field of view is within + 0.03mm; The variation is within + 0.04mm; and the distortion aberration can be controlled within 21%. As shown in FIG. 6B , the optical imaging lens group 60 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system. Seventh embodiment

Referring to FIG. 7A and FIG. 7B, FIG. 7A is a schematic diagram of an optical imaging lens group according to a seventh embodiment of the present invention. Fig. 7B is, from left to right, the diagram of Longitudinal Spherical Aberration, Astigmatism/Field Curvature and Distortion of the seventh embodiment of the present invention.

As shown in Figure 7A, the optical imaging lens group 70 of the seventh embodiment includes a first lens 71, a second lens 72, a third lens 73, a diaphragm ST, a fourth lens 74, a fifth lens 75 , sixth lens 76 and seventh lens 77 . The optical camera lens group 70 can further include a filter element 78 and an imaging surface 79 . An image sensing element 700 can be further disposed on the imaging surface 79 to form an imaging device (not otherwise labeled).

The first lens 71 has a negative refractive power, its object side 71 a is convex, its image side 71 b is concave, and both its object side 71 a and image side 71 b are spherical. The material of the first lens 71 is glass.

The second lens 72 has a negative refractive power. The object side 72a is convex, the image side 72b is concave, and both the object side 72a and the image side 72b are aspherical. The material of the second lens 72 is plastic.

The third lens 73 has negative refractive power, the object side 73a is concave, the image side 73b is convex, and both the object side 73a and the image side 73b are aspherical. The material of the third lens 73 is plastic.

The fourth lens 74 has a positive refractive power, its object side 74a is convex, its image side 74b is convex, and both its object side 74a and image side 74b are spherical. The material of the fourth lens 74 is glass.

The fifth lens 75 has positive refractive power, its object side 75 a is convex, its image side 75 b is convex, and both its object side 75 a and image side 75 b are aspherical. The material of the fifth lens 75 is glass.

The sixth lens 76 has a negative refractive power, its object side 76 a is concave, its image side 76 b is concave, and both its object side 76 a and image side 76 b are spherical. The material of the sixth lens 76 is glass.

The seventh lens 77 has positive refractive power, its object side 77 a is convex, its image side 77 b is convex, and its object side 77 a and image side 77 b are both aspherical. The material of the seventh lens 77 is plastic.

The filter element 78 is disposed between the seventh lens 77 and the imaging surface 79 to filter out light in a specific wavelength range, such as an infrared filter (IR Filter). The two surfaces 78a, 78b of the filter element 78 are both flat and made of glass.

The image sensor (Image Sensor) 700 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a Complementary Metal Oxide Semiconductor Sensor (CMOS Image Sensor).

The detailed optical data and aspheric coefficients of the lens surface of the optical imaging lens group 70 of the seventh embodiment are listed in Table 18 and Table 19, respectively. In the seventh embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. Seventh embodiment EFL= 2.06 mm, Fno = 2.59, HFOV = 75 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) material subject unlimited unlimited first lens 71a sphere 15.000 0.830 1.780 49.5 -5.86 Glass 71b sphere 3.406 0.803 second lens 72a Aspherical 2.962 0.402 1.514 56.5 -7.46 plastic 72b Aspherical 1.591 1.770 third lens 73a Aspherical -2.403 0.466 1.514 56.5 -10.62 plastic 73b Aspherical -4.595 0.282 aperture ST flat unlimited 0.000 fourth lens 74a sphere 6.719 0.800 1.918 31.3 4.92 Glass 74b sphere -12.679 0.300 fifth lens 75a Aspherical 4.417 1.743 1.751 49.3 2.77 Glass 75b Aspherical -3.231 0.164 sixth lens 76a sphere -5.551 0.657 1.986 17.5 -2.57 Glass 76b sphere 4.805 0.168 seventh lens 77a Aspherical 5.682 1.385 1.594 61.1 4.06 plastic 77b Aspherical -3.779 1.021 filter element 78a flat unlimited 0.210 1.517 64.2 Glass 78b flat unlimited 1.536 imaging surface 79 flat unlimited Reference wavelength: 550 nm Table 18 Aspherical coefficient of the seventh embodiment surface 72a 72b 73a 73b K 3.42E-01 -6.31E-01 -1.06E+00 -2.11E+01 A ₂ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A ₄ 3.61E-02 5.82E-02 -2.20E-03 -3.22E-02 A ₆ -6.72E-03 1.11E-02 3.15E-03 1.78E-02 A ₈ -4.90E-04 -1.23E-02 4.51E-03 -8.21E-04 A ₁₀ 7.03E-05 2.77E-03 -2.64E-03 -2.94E-03 A ₁₂ -1.30E-06 0.00E+00 -1.43E-04 1.04E-03 A ₁₄ 0.00E+00 0.00E+00 6.11E-04 -1.30E-04 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 surface 75a 75b 77a 77b K -9.00E+00 -5.92E-01 -1.02E+01 5.08E-01 A ₂ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A ₄ 2.30E-03 1.47E-03 5.49E-03 1.73E-02 A ₆ 4.61E-04 2.30E-03 1.88E-03 4.92E-04 A ₈ -2.39E-04 -4.12E-04 -2.16E-04 4.19E-04 A ₁₀ 3.81E-05 2.61E-05 2.45E-05 -2.70E-05 A ₁₂ 2.58E-06 7.10E-06 -1.08E-07 -2.20E-07 A ₁₄ 1.21E-06 0.00E+00 -1.29E-07 1.71E-07 A ₁₆ 0.00E+00 0.00E+00 -4.44E-09 7.93E-08 Table nineteen

In the seventh embodiment, the values of the relational expressions of the optical imaging lens group 70 are listed in Table 20. It can be known from Table 20 that the optical imaging lens group 70 of the seventh embodiment satisfies the requirements of relational expressions (1) to (13). Relational value f3/EFL -5.16 CT3/CT2 1.16 f34/EFL 3.71 f2/f1 1.27 f56/EFL 5.67 R12/R13 0.85 f5/EFL 1.34 f7/EFL 1.97 (R7+R8)/(R8-R7) 0.31 f1234 -19.20 f123/EFL -1.00 R3/R4 1.86 f4/EFL 2.39 TTL/AT23 7.08 Table twenty

Referring to FIG. 7B , from left to right in the figure are the longitudinal spherical aberration diagram, the astigmatism field curvature aberration diagram and the distortion aberration diagram of the optical imaging lens group 70 . It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three visible light wavelengths of 470nm, 550nm and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within + 0.03mm. From the astigmatism and field curvature aberration diagram (wavelength 550nm), it can be seen that the focal length variation of the sagittal direction aberration in the entire field of view is within + 0.03mm; The variation is within + 0.03mm; and the distortion aberration can be controlled within 12%. As shown in FIG. 7B , the optical imaging lens group 70 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system. Eighth embodiment

The eighth embodiment of the present invention is an imaging device, which includes the optical imaging lens group as in the aforementioned first to seventh embodiments, and an image sensing element. The image sensing element is, for example, a Charge-Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensing element. The imaging device is, for example, a camera module for vehicle photography, a camera module for portable electronic products, or a camera module for surveillance cameras. Ninth embodiment

Please refer to FIG. 8 , which is a schematic diagram of an electronic device 1000 according to a ninth embodiment of the present invention. As shown in the figure, the electronic device 1000 includes an imaging device 1010 . The imaging device 1010 is, for example, the imaging device of the aforementioned eighth embodiment, which may be composed of the optical imaging lens group and an image sensing element of the present invention. The electronic device 1000 is, for example, a car camera, a surveillance camera, or an aerial camera.

Although the present invention has been described using the preceding several examples, these examples are not intended to limit the scope of the present invention. For those skilled in the technical field of the present invention, without departing from the spirit and scope of the present invention, various changes in form and details can still be made with reference to the disclosed embodiments of the present invention. Therefore, what needs to be understood here is that the present invention is defined by the scope of the following patent application, and any changes made within the scope of the patent application or its equivalent scope should still fall into the application within the scope of the patent.

10, 20, 30, 40, 50, 60, 70: optical camera lens group 11, 21, 31, 41, 51, 61, 71: first lens 12, 22, 32, 42, 52, 62, 72: second lens 13, 23, 33, 43, 53, 63, 73: third lens 14, 24, 34, 44, 54, 64, 74: fourth lens 15, 25, 35, 45, 55, 65, 75: fifth lens 16, 26, 36, 46, 56, 66, 76: sixth lens 17, 27, 37, 47, 57, 67, 77: the seventh lens 18, 28, 38, 48, 58, 68, 78: filter elements 19, 29, 39, 49, 59, 69, 79: imaging surface 11a, 21a, 31a, 41a, 51a, 61a, 71a: the object side of the first lens 11b, 21b, 31b, 41b, 51b, 61b, 71b: image side of the first lens 12a, 22a, 32a, 42a, 52a, 62a, 72a: the object side of the second lens 12b, 22b, 32b, 42b, 52b, 62b, 72b: the image side of the second lens 13a, 23a, 33a, 43a, 53a, 63a, 73a: the object side of the third lens 13b, 23b, 33b, 43b, 53b, 63b, 73b: the image side of the third lens 14a, 24a, 34a, 44a, 54a, 64a, 74a: the object side of the fourth lens 14b, 24b, 34b, 44b, 54b, 64b, 74b: the image side of the fourth lens 15a, 25a, 35a, 45a, 55a, 65a, 75a: the object side of the fifth lens 15b, 25b, 35b, 45b, 55b, 65b, 75b: image side of the fifth lens 16a, 26a, 36a, 46a, 56a, 66a, 76a: the object side of the sixth lens 16b, 26b, 36b, 46b, 56b, 66b, 76b: the image side of the sixth lens 17a, 27a, 37a, 47a, 57a, 67a, 77a: the object side of the seventh lens 17b, 27b, 37b, 47b, 57b, 67b, 77b: image side of the seventh lens 18a, 18b, 28a, 28b, 38a, 38b, 48a, 48b, 58a, 58b, 68a, 68b, 78a, 78b: two surfaces of the filter element 100, 200, 300, 400, 500, 600, 700: Image sensor 1000: electronic device 1010: Imaging device I: optical axis ST: Aperture

[Fig. 1A] is a schematic diagram of the optical imaging lens group of the first embodiment of the present invention; [Fig. 1B] From left to right are the longitudinal spherical aberration diagram, astigmatism field curvature aberration diagram and distortion aberration diagram of the first embodiment of the present invention; [Fig. 2A] is a schematic diagram of the optical imaging lens group of the second embodiment of the present invention; [Fig. 2B] From left to right are the longitudinal spherical aberration diagram, astigmatism field curvature aberration diagram and distortion aberration diagram of the second embodiment of the present invention; [Fig. 3A] is a schematic diagram of the optical imaging lens group of the third embodiment of the present invention; [Fig. 3B] From left to right are the longitudinal spherical aberration diagram, astigmatism field curvature aberration diagram and distortion aberration diagram of the third embodiment of the present invention; [Fig. 4A] is a schematic diagram of the optical imaging lens group of the fourth embodiment of the present invention; [Fig. 4B] From left to right are the longitudinal spherical aberration diagram, astigmatism field curvature aberration diagram and distortion aberration diagram of the fourth embodiment of the present invention; [Fig. 5A] is a schematic diagram of the optical imaging lens group of the fifth embodiment of the present invention; [Fig. 5B] From left to right are the longitudinal spherical aberration diagram, astigmatism field curvature aberration diagram and distortion aberration diagram of the fifth embodiment of the present invention; [Fig. 6A] is a schematic diagram of the optical imaging lens group of the sixth embodiment of the present invention; [Fig. 6B] From left to right are the longitudinal spherical aberration diagram, astigmatism field curvature aberration diagram and distortion aberration diagram of the sixth embodiment of the present invention; [FIG. 7A] is a schematic diagram of the optical imaging lens group of the seventh embodiment of the present invention; [Fig. 7B] From left to right are the longitudinal spherical aberration diagram, astigmatic field curvature aberration diagram and distortion aberration diagram of the seventh embodiment of the present invention; and [FIG. 8] is a schematic diagram of an electronic device according to a ninth embodiment of the present invention.

10: Optical camera lens group

11: First lens

12: Second lens

13: Third lens

14: Fourth lens

15: fifth lens

16: sixth lens

17: seventh lens

18: Filter element

19: Imaging surface

11a: The side of the object of the first lens

11b: The image side of the first lens

12a: The side of the second lens

12b: The image side of the second lens

13a: The side of the third lens

13b: The image side of the third lens

14a: The side of the fourth lens

14b: The image side of the fourth lens

15a: The side of the fifth lens

15b: The image side of the fifth lens

16a: The side of the sixth lens

16b: The image side of the sixth lens

17a: The side of the object of the seventh lens

17b: The image side of the seventh lens

18a, 18b: two surfaces of the filter element

100: Image sensing element

I: optical axis

ST: Aperture

Claims (16)

An optical imaging lens group, comprising in sequence from the object side to the image side: a first lens with negative refractive power, the object side is convex and the image side is concave; a second lens has negative refractive power, and the object side is concave. a convex surface and a concave image side; a third lens with negative refraction power, a concave object side and a convex image side; an aperture; a fourth lens with positive refraction, a convex object side and a convex image side a convex surface; a fifth lens with positive refractive power, the object side is convex and the image side is convex; a sixth lens has negative refractive power, the object side is concave and the image side is concave; and a seventh lens , has positive refractive power, its object side is convex, and its image side is convex; wherein, the total number of lenses in the optical imaging lens group is seven; wherein, the combined focal length of the third lens and the fourth lens is f34, and the overall optical The effective focal length of the camera lens group is EFL, which satisfies the following relationship: 3<f34/EFL<7. Such as the optical imaging lens group of item 1 of the scope of application, wherein the thickness of the second lens on the optical axis is CT2, and the thickness of the third lens on the optical axis is CT3, which satisfy the following relationship: 0.6<CT3 /CT2<2.6. For example, the optical imaging lens group of claim 1, wherein the focal length of the first lens is f1, and the focal length of the second lens is f2, which satisfy the following relationship: 1<f2/f1<4. For example, the optical imaging lens group of item 1 of the scope of the patent application, wherein the combined focal length of the fifth lens and the sixth lens is f56, which satisfies the following relationship with the effective focal length EFL of the optical imaging lens group: 2<f56/EFL<6.5. For example, the optical imaging lens group of claim 1, wherein the radius of curvature of the image side of the sixth lens is R12, and the radius of curvature of the object side of the seventh lens is R13, which satisfy the following relationship: 0.4<R12/R13 <1.4. For example, the optical imaging lens group of item 1 of the patent scope, wherein the focal length of the fifth lens is f5, and the effective focal length EFL of the optical imaging lens group satisfies the following relationship: 0.9<f5/EFL< 1.8. For example, the optical imaging lens group of item 1 of the patent scope, wherein the focal length of the seventh lens is f7, and the effective focal length EFL of the optical imaging lens group satisfies the following relationship: 1.5<f7/EFL< 2.3. For example, the optical imaging lens group of item 1 of the scope of the patent application, wherein, the radius of curvature of the object side of the fourth lens is R7, and the radius of curvature of the image side is R8, which satisfy the following relationship: -0.9<(R7+R8)/ (R8-R7)<0.6. As for the optical imaging lens group of item 1 of the scope of the patent application, wherein the combined focal length of the first lens, the second lens, the third lens and the fourth lens is a negative value. For example, the optical imaging lens group of item 1 of the scope of the patent application, wherein the combined focal length of the first lens, the second lens and the third lens is f123, and the effective focal length EFL of the optical imaging lens group is equal to Satisfy the following relationship: -1.3<f123/EFL<-0.6. For example, the optical imaging lens group of item 1 of the scope of the patent application, wherein the radius of curvature of the object side of the second lens is R3, and the radius of curvature of the image side is R4, which satisfy the following relationship: 1.4<R3/R4<2.3. Such as the optical imaging lens group of item 1 of the patent scope, wherein the focal length of the fourth lens is f4, and the effective focal length EFL of the optical imaging lens group satisfies the following relationship: 1.6<f4/EFL< 3.3. Such as the optical imaging lens group of item 1 of the scope of the patent application, wherein the distance on the optical axis from the image side of the second lens to the object side of the third lens is AT23, and the image from the object side of the first lens to the optical imaging lens group The distance between the plane and the optical axis is TTL, which satisfies the following relationship: 5<TTL/AT23<14. For example, the optical imaging lens group of item 1 of the patent scope, wherein the focal length of the third lens is f3, and the effective focal length of the overall optical imaging lens group is EFL, which satisfies the following relationship: -10<f3/EFL<-2 . An imaging device includes the optical imaging lens group as claimed in item 1 of the scope of the patent application, and an image sensing element, wherein the image sensing element is arranged on the imaging surface of the optical imaging lens group. An electronic device, which includes the imaging device described in item 15 of the scope of the patent application.

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