TWI880579B - Optical imaging lens, imaging device and electronic device - Google Patents

Abstract

An optical imaging lens including a first lens element, a second lens element, a third lens element and a fourth lens element arranged in sequence from an object side to an image side along an optical axis is provided. The optical imaging lenses include, from an object side to an image side, the first lens element having negative refractive power and including an object-side surface being convex, and an image-side surface being concave; the second lens element having positive refractive power and including an object-side surface being convex, and an image-side surface being concave; the third lens element having positive refractive power and including an object-side surface being convex, and an image-side surface being convex; the fourth lens element having negative refractive power and including an object-side surface being convex, and an image-side surface being concave. The optical imaging lenses include a total of four elements.

Description

Optical photographic lens assembly, imaging device and electronic device

The present invention relates to an optical imaging lens set and an imaging device, in particular to an optical imaging lens set and an imaging device that can be used in general electronic devices.

With the advancement of semiconductor process technology, the sensing elements of imaging sensors (such as CCD and CMOS Image Sensor) can meet the requirements of miniaturization, thereby improving the manufacturing convenience of small sensing devices and driving the improvement of the functionality of sensing devices. However, in addition to responding to the trend of miniaturization and functional improvement, in order to meet the requirements of target applications, sensing devices have also gradually developed from one-dimensional and two-dimensional sensing applications to three-dimensional, large field of view, and lower manufacturing costs.

With the diversification of electronic imaging devices, their application scope is becoming more and more extensive, such as security sensing equipment, home monitoring equipment, smart phones and human-machine interactive devices, and the design requirements of optical lenses are becoming more diverse. The traditional one-dimensional and two-dimensional sensing capabilities have gradually failed to meet the needs of target customers, and are developing towards three-dimensional and high-resolution. Therefore, the optical components used in such sensing components often gradually develop from simple lenses to camera lenses. However, increasing the sensing dimension and expanding the sensing range will increase the number of optical components and complicate the structure. In addition, a camera lens with an expanded sensing range usually uses a lens with negative refractive power at the first lens position to increase the light collection range. In order to correct the imaging aberration caused by incident light at a large angle, additional lenses need to be added to correct the aberration. Various factors will increase the total length of the sensing camera lens.

Therefore, how to provide a miniaturized, three-dimensional sensing optical camera with high imaging quality has become the goal of continuous efforts of those in this technology field.

Therefore, in order to solve the above problems, the present invention provides an optical photographic lens set, which includes, from the object side to the image side, a first lens having negative refractive power, a convex object side surface, and a concave image side surface; a second lens having positive refractive power, a convex object side surface, and a concave image side surface; an aperture; a third lens having positive refractive power, a convex object side surface, and a convex image side surface; a fourth lens having negative refractive power, a convex object side surface, and a concave image side surface; is a convex surface, and its image side surface is a concave surface; wherein the thickness of the first lens is CT1, the thickness of the second lens is CT2, the air interval between the first and second lenses is AT12, the focal length of the first lens is f1, the focal length of the second lens is f2, and the focal length of the optical photography lens set is EFL, which satisfies the following relationship: -0.4<(CT2-CT1)/AT12<1.1; and 4<(f1+f2)/EFL<83.

The present invention further provides an optical photographic lens assembly, which includes, from the object side to the image side, a first lens having negative refractive power, a convex object side surface, and a concave image side surface; a second lens having positive refractive power, a convex object side surface, and a concave image side surface; an aperture; a third lens having positive refractive power, a convex object side surface, and a convex image side surface; a fourth lens having negative refractive power, a convex object side surface, and a concave image side surface; The image side surface is a concave surface; wherein the thickness of the first lens is CT1, the thickness of the second lens is CT2, the air interval between the first and second lenses is AT12, the focal length of the second lens is f2, the focal length of the third lens is f3, and the focal length of the optical photography lens set is EFL, which satisfies the following relationship: -0.4<(CT2-CT1)/AT12<1.1; and 6<(f2+f3)/EFL<85.

According to an embodiment of the present invention, the radius of curvature of the object surface of the second lens is R3, and the focal length of the second lens is f2, which satisfies the following relationship: 0.011<R3/f2<0.13.

According to an embodiment of the present invention, the focal length of the first lens is f1, the focal length of the second lens is f2, the thickness of the first lens is CT1, and the thickness of the second lens is CT2, which satisfies the following relationship: 8<(f1+f2)/(CT1+CT2)<193.

According to an embodiment of the present invention, the focal length of the second lens is f2, the focal length of the third lens is f3, the thickness of the second lens is CT2, and the thickness of the third lens is CT3, which satisfies the following relationship: 5<(f2+f3)/(CT2+CT3)<95.

According to an embodiment of the present invention, the radius of curvature of the object surface of the second lens is R3, the radius of curvature of the image surface of the second lens is R4, and the focal length of the second lens is f2, which satisfies the following relationship: 0.02<(R3+R4)/f2<0.3.

According to an embodiment of the present invention, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the thickness of the third lens is CT3, and the thickness of the fourth lens is CT4, which satisfies the following relationship: -1.6<(f3+f4)/(CT3+CT4)<-0.5.

According to an embodiment of the present invention, the radius of curvature of the object surface of the fourth lens is R7, and the focal length of the fourth lens is f4, which satisfies the following relationship: -0.9<R7/f4<-0.5.

According to an embodiment of the present invention, the focal length of the fourth lens is f4, and the focal length of the optical camera lens set is EFL, which satisfies the following relationship: -2.2<f4/EFL<-1.1.

According to an embodiment of the present invention, the thickness of the third lens is CT3, the thickness of the fourth lens is CT4, and the air interval between the third and fourth lenses is AT34, which satisfies the following relationship: 4<(CT3-CT4)/AT34<29.

According to an embodiment of the present invention, the air interval of the third and fourth lenses is AT34, and the focal length EFL of the optical photographic lens set satisfies the following relationship: 0.019<AT34/EFL<0.057.

According to an embodiment of the present invention, the focal length of the optical camera lens set is EFL, and the thickness of the first lens is CT1, which satisfies the following relationship: 4.2<EFL/CT1<9.1.

According to an embodiment of the present invention, the total length of the optical camera lens set is TTL, and the air interval of the third and fourth lenses is AT34, which satisfies the following relationship: 42<TTL/AT34<117.

According to an embodiment of the present invention, the radius of curvature of the object surface of the first lens is R1, the radius of curvature of the image surface of the first lens is R2, and the focal length of the first lens is f1, which satisfies the following relationship: -12<(R1+R2)/f1<-2.4.

According to an embodiment of the present invention, the refractive indexes of the first lens to the fourth lens are the same.

According to an embodiment of the present invention, the dispersion coefficients of the first lens to the fourth lens are the same.

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

The present invention further provides an electronic device, which includes the imaging device as described above.

10, 20, 30, 40, 50, 60: Optical photography lens set

11, 21, 31, 41, 51, 61: First lens

12, 22, 32, 42, 52, 62: Second lens

13, 23, 33, 43, 53, 63: The third lens

14, 24, 34, 44, 54, 64: The fourth lens

15, 25, 35, 45, 55, 65: filter element

101, 201, 301, 401, 501, 601: Imaging surface

11a, 21a, 31a, 41a, 51a, 61a: side of the first lens

11b, 21b, 31b, 41b, 51b, 61b: Image side of the first lens

12a, 22a, 32a, 42a, 52a, 62a: Object side of the second lens

12b, 22b, 32b, 42b, 52b, 62b: Image side of the second lens

13a, 23a, 33a, 43a, 53a, 63a: The side of the third lens

13b, 23b, 33b, 43b, 53b, 63b: Image side of the third lens

14a, 24a, 34a, 44a, 54a, 64a: The side of the fourth lens

14b, 24b, 34b, 44b, 54b, 64b: Image side of the fourth lens

15a, 15b, 25a, 25b, 35a, 35b, 45a, 45b, 55a, 55b, 65a, 65b: two surfaces of the filter element

102, 202, 302, 402, 502, 602: Image sensing element

1000: General electronic devices

1010: Imaging device

I: Optical axis

ST: aperture

〔FIG. 1A〕is a schematic diagram of an optical photographic lens assembly of the first embodiment of the present invention; 〔FIG. 1B〕is a diagram of astigmatism field curvature aberration, distortion diagram and longitudinal spherical aberration of the first embodiment of the present invention from left to right; 〔FIG. 2A〕is a schematic diagram of an optical photographic lens assembly of the second embodiment of the present invention; 〔FIG. 2B〕is a diagram of astigmatism field curvature aberration, distortion diagram and longitudinal spherical aberration of the second embodiment of the present invention from left to right; 〔FIG. 3A〕is a schematic diagram of an optical photographic lens assembly of the third embodiment of the present invention; 〔FIG. 3B〕is a diagram of astigmatism field curvature aberration, distortion diagram and longitudinal spherical aberration of the third embodiment of the present invention from left to right; 〔FIG. 4A〕is a diagram of Schematic diagram of the optical photographic lens set of the fourth embodiment of the present invention; [Figure 4B] is the astigmatism field curvature aberration diagram, distortion diagram and longitudinal spherical aberration diagram of the fourth embodiment of the present invention from left to right; [Figure 5A] is the schematic diagram of the optical photographic lens set of the fifth embodiment of the present invention; [Figure 5B] is the astigmatism field curvature aberration diagram, distortion diagram and longitudinal spherical aberration diagram of the fifth embodiment of the present invention from left to right; [Figure 6A] is the schematic diagram of the optical photographic lens set of the sixth embodiment of the present invention; [Figure 6B] is the astigmatism field curvature aberration diagram, distortion diagram and longitudinal spherical aberration diagram of the sixth embodiment of the present invention from left to right; [Figure 07] is the schematic diagram of the general electronic device of the seventh embodiment of the present invention.

In the following embodiments, each lens of the optical photographic lens set can be made of glass or plastic, but 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, due to the temperature change resistance and high hardness of the glass material itself, the impact of environmental changes on the optical photographic lens set can be reduced, thereby extending the service life of the optical photographic lens set. When the lens material is plastic, it is beneficial to reduce the weight of the optical photographic lens set and reduce production costs.

In the embodiments of the present invention, each lens includes an object side facing the photographed object 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 (near axis). For example, when the object side of a lens is described as convex, 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 the area far from the optical axis (off axis). The shape of each lens near the axis is determined by whether the radius of curvature of the surface is positive or negative. For example, if the radius of curvature of the object side of a lens is positive, the object side is convex; conversely, if the radius of curvature is negative, the object side is concave. For the image side of a lens, if the radius of curvature is positive, the image side is concave; conversely, if the radius of curvature is negative, the image side is convex.

In the embodiment of the present invention, the object side and image side of each lens can be spherical or aspherical surfaces. Using an aspherical surface on a lens helps to correct imaging aberrations of an optical photographic lens set such as spherical aberration, and reduce the number of optical lens elements used. However, the use of an aspherical lens will increase the cost of the entire optical photographic lens set. Although in the embodiment of the present invention, some optical lens surfaces use spherical surfaces, they can still be designed as aspherical surfaces as needed; or, some optical lens surfaces use aspherical surfaces, but they can still be designed as spherical surfaces as needed.

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

The present invention provides an optical imaging lens set, which includes a first lens, a second lens, an aperture, a third lens, and a fourth lens in order from the object side to the image side.

The first lens has negative refractive power, its object side is convex, and its image side is concave. Preferably, the material of the first lens can be plastic to reduce manufacturing cost and facilitate processing, and help improve mass production capacity and reduce lens weight. In the embodiment of the present invention, the object side surface and/or the image side surface of the first lens can be aspherical, which will help improve spherical aberration and increase the degree of lens surface variation, which helps to compress the lens volume; furthermore, by providing an aspherical lens, more control variables can be obtained to eliminate aberrations, reduce the number of lenses, and effectively reduce the total length of the lens group of the photographic optical system of the present invention; further, the aspherical surface can be made by plastic injection molding or molded glass lens.

The second lens has positive refractive power, and its object side surface can be convex, while its image side surface is concave; preferably, the material of the second lens can be plastic to reduce manufacturing cost, facilitate processing, help improve mass production capacity and reduce lens weight. In the embodiment of the present invention, the object side surface and/or the image side surface of the second lens can be aspherical, which will help improve spherical aberration and increase the degree of lens surface variation, which helps to compress the lens volume; furthermore, by providing an aspherical lens, more control variables can be obtained to eliminate aberrations, reduce the number of lenses, and effectively reduce the total length of the lens group of the photographic optical system of the present invention; further, the aspherical surface can be made by plastic injection molding or molded glass lens.

The third lens may have positive refractive power, with a convex object side and a convex image side. Preferably, the third lens may be made of plastic to reduce manufacturing costs and facilitate processing, and to help improve mass production capabilities and reduce lens weight. In the embodiment of the present invention, the object side surface and/or the image side surface of the third lens can be aspherical, which will help improve spherical aberration and increase the degree of lens surface variation, which helps to compress the lens volume; furthermore, by providing an aspherical lens, more control variables can be obtained to eliminate aberrations, reduce the number of lenses, and effectively reduce the total length of the lens assembly of the photographic optical system of the present invention; further, the aspherical surface can be made by plastic injection molding or molded glass lens.

The fourth lens can be of negative refractive power, its object side surface can be convex, and its image side surface can be concave; the refractive power of the fourth lens matches the third lens, which is beneficial to reduce imaging aberration. Preferably, the material of the fourth lens can be plastic to reduce manufacturing cost and facilitate processing, and help improve mass production capacity and reduce lens weight. In the embodiment of the present invention, the object side surface and/or the image side surface of the fourth lens can be aspherical, which will help improve spherical aberration and increase the degree of lens surface variation, which helps to compress the lens volume; furthermore, by providing an aspherical lens, more control variables can be obtained to eliminate aberrations, reduce the number of lenses, and effectively reduce the total length of the lens group of the photographic optical system of the present invention; further, the aspherical surface can be made by plastic injection molding or molded glass lens.

The thickness of the first lens of the optical lens set is CT1, the thickness of the second lens is CT2, and the air interval between the first and second lenses is AT12, which satisfies the following relationship: -0.4<(CT2-CT1)/AT12<1.1(1).

When the relationship (1) is satisfied, the distance between the first lens and the second lens on the optical axis and the thickness difference between the first lens and the second lens can be controlled to maintain an appropriate ratio, thereby controlling the size of the optical imaging lens set.

The focal length of the first lens of the optical photographic lens set is f1, the focal length of the second lens is f2, and the focal length of the optical photographic lens set is EFL, which satisfies the following relationship: 4<(f1+f2)/EFL<83(2).

When the relationship (2) is satisfied, the optical image distortion can be controlled by configuring the focal length ratio of the first lens and the second lens to the focal length of the entire optical system.

The focal length of the second lens of the optical photographic lens set is f2, the focal length of the third lens is f3, and the focal length of the optical photographic lens set is EFL, which satisfies the following relationship: 6<(f2+f3)/EFL<85(3).

When the relationship (3) is satisfied, the aberration is corrected by configuring the ratio of the focal length of the second lens and the third lens to the focal length of the entire optical system.

The radius of curvature of the object surface of the second lens of the optical imaging lens set is R3, and the focal length of the second lens is f2, which satisfies the following relationship: 0.011<R3/f2<0.13(4).

When the relationship (4) is satisfied, it is beneficial to correct the aberration.

The focal length of the first lens of the optical photographic lens set is f1, the focal length of the second lens is f2, the thickness of the first lens is CT1, and the thickness of the second lens is CT2, which satisfies the following relationship: 8<(f1+f2)/(CT1+CT2)<193(5).

When the relationship (5) is satisfied, the variation trend of the spherical aberration and chromatic aberration of the optical system can be effectively controlled, and the difficulty of correcting the spherical aberration and chromatic aberration of the optical system can be reduced.

The focal length of the second lens of the optical photographic lens set is f2, the focal length of the third lens is f3, the thickness of the second lens is CT2, and the thickness of the third lens is CT3, which satisfies the following relationship: 5<(f2+f3)/(CT2+CT3)<95(6).

When the relationship (6) is satisfied, the optical path difference of the optical imaging system can be reduced and the imaging quality can be improved.

The radius of curvature of the object surface of the second lens of the optical photographic lens set is R3, the radius of curvature of the image surface of the second lens is R4, and the focal length of the second lens is f2, which satisfies the following relationship: 0.02<(R3+R4)/f2<0.3(7).

When the relationship (7) is satisfied, the surface shape and refractive power of the second lens can be adjusted, which helps to adjust the volume distribution of the photographic optical system.

The focal length of the third lens of the optical photographic lens set is f3, the focal length of the fourth lens is f4, the thickness of the third lens is CT3, and the thickness of the fourth lens is CT4, which satisfies the following relationship: -1.6<(f3+f4)/(CT3+CT4)<-0.5(8).

When satisfying the relation (8), if its absolute value is too large, the focal length of the third lens and the fourth lens is too large, and the light deflection ability is weakened. If its absolute value is too small, the thickness of the third lens and the fourth lens is too large, which leads to the overall length of the optical camera lens being too large. By limiting the relation (8) within a reasonable range, a reasonable optical power distribution and a smaller total system length can be achieved, thereby controlling spherical aberration.

The curvature radius of the object surface of the fourth lens of the optical imaging lens set is R7, and the focal length of the fourth lens is f4, which satisfies the following relationship: -0.9<R7/f4<-0.5(9).

When the relation (9) is satisfied, the surface shape and refractive power of the fourth lens can be adjusted, which helps to compress the volume; and it means that the refractive power of the manufactured lens system can be effectively distributed without increasing the difficulty of manufacturing.

The focal length of the fourth lens of the optical photographic lens set is f4, and the focal length of the optical photographic lens set is EFL, which satisfies the following relationship: -2.2<f4/EFL<-1.1(10).

When the relationship (10) is satisfied, the fourth lens can have an appropriate positive refractive power to serve as the main element for adjusting the optical path. If f4/EFL is lower than the lower limit of the relationship, the positive refractive power of the fourth lens is larger, which tends to shorten the imaging distance at the rear end of the optical imaging lens group, affecting the configuration of the optical lens group at the rear end of the aperture; if f4/EFL is higher than the upper limit of the relationship, the positive refractive power of the fourth lens is smaller, which tends to increase the total length of the optical imaging lens group, which is not conducive to miniaturization.

The thickness of the third lens of the optical camera lens set is CT3, the thickness of the fourth lens is CT4, and the air interval between the third and fourth lenses is AT34, which satisfies the following relationship: 4<(CT3-CT4)/AT34<29(11).

When the relationship (11) is satisfied, the third lens and the fourth lens can cooperate with each other, which helps to balance the volume distribution of the image capture system on the object side and the image side.

The air interval between the third and fourth lenses of the optical photographic lens set is AT34, and the focal length EFL of the optical photographic lens set satisfies the following relationship: 0.019<AT34/EFL<0.057(12).

When the relation (12) is satisfied, the back focal length of the imaging optical lens assembly can be more effectively controlled, which is beneficial to shortening the total length of the system.

The focal length of the optical camera lens set is EFL, and the thickness of the first lens is CT1, which satisfies the following relationship: 4.2<EFL/CT1<9.1(13).

When the relation (13) is satisfied, the surface shape and refractive power of the first lens can be adjusted to compress the side volume of the optical lens assembly for imaging.

The total length of the optical camera lens set is TTL, and the air interval between the third and fourth lenses is AT34, which satisfies the following relationship: 42<TTL/AT34<117(14).

When the relationship (14) is satisfied, the third lens and the fourth lens can have an appropriate distance on the optical axis, which is beneficial to control the total length of the optical imaging lens set.

The radius of curvature of the object surface of the first lens of the optical photography lens set is R1, the radius of curvature of the image surface of the first lens is R2, and the focal length of the first lens is f1, which satisfies the following relationship: -12<(R1+R2)/f1<-2.4(15).

When the relationship (15) is satisfied, the incident angle of light can be reduced, and the sensitivity can be reduced to correct the problem of excessive peripheral aberration, thereby controlling the field of view (FOV) range.

The refractive indexes of the first lens to the fourth lens are all the same.

The dispersion coefficients of the first lens to the fourth lens are all the same.

First Embodiment

See FIG. 1A and FIG. 1B. FIG. 1A is a schematic diagram of the optical photographic lens set of the first embodiment of the present invention. FIG. 1B is, from left to right, the astigmatism/field curvature aberration diagram, the f-tanθ distortion diagram, and the longitudinal spherical aberration diagram of the first embodiment of the present invention.

As shown in FIG. 1A , the optical imaging lens set 10 of the first embodiment includes a first lens 11, a second lens 12, an aperture ST, a third lens 13, and a fourth lens 14 in order from the object side to the image side. The optical imaging lens set 10 may further include a filter element 15 and an imaging surface 101. An image sensing element 102 may be disposed on the imaging surface 101 to form an imaging device (not labeled).

The first lens 11 has negative refractive power, and its object side surface 11a is convex, and its image side surface 11b is concave, and both the object side surface 11a and the image side surface 11b are aspherical. The material of the first lens 11 includes plastic, but is not limited thereto.

The second lens 12 has positive refractive power, and its object side surface 12a is convex; its image side surface 12b is concave, and both the object side surface 12a and the image side surface 12b are aspherical. The material of the second lens 12 includes plastic, but is not limited thereto.

The third lens 13 has positive refractive power, its object side surface 13a is convex, its image side surface 13b is convex, and both the object side surface 12a and the image side surface 12b are aspherical. The material of the third lens 13 includes plastic, but is not limited thereto.

The fourth lens 14 has negative refractive power, and its object side surface 14a is convex, and its image side surface 14b is concave, and both the object side surface 14a and the image side surface 14b are aspherical. The material of the fourth lens 14 includes plastic, but is not limited thereto.

The filter element 15 is disposed between the fourth lens 14 and the imaging surface 101 to filter light in a specific wavelength range to allow the required wavelength to pass through, such as an ultraviolet or far infrared light filter element. The two surfaces 15a and 15b of the filter element 15 are both flat and made of glass.

The image sensor 102 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image 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 that is Y away from the optical axis 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; C: the reciprocal of the radius of curvature of the lens near the optical axis; K: the cone coefficient; and Ai: the i-th order aspheric coefficient, where i=2x, and x is a natural number greater than and equal to 2, that is, i is an even number greater than and equal to 4.

Please refer to Table 1 below, which is the detailed optical data of the optical photographic lens set 10 of the first embodiment of the present invention. Among them, the object side surface 11a of the first lens 11 is marked as surface 11a, the image side surface 11b is marked as surface 11b, and the other lens surfaces are similar. The value of the distance column in the table represents the distance from the surface to the next surface on the optical axis I. For example, the distance from the object side surface 11a of the first lens 11 to the image side surface 11b is 0.372mm, which means that the thickness of the first lens 11 is 0.372mm. The distance AT12 from the image side surface 11b of the first lens 11 to the object side surface 12a of the second lens 12 is 0.564mm. The same applies to other cases, which will not be repeated below. In the first embodiment, the effective focal length of the optical camera lens set 10 is EFL, and the maximum half field of view angle of the entire optical camera lens set 10 is HFOV (Half Field of View), and its values are also listed in Table 1.

Please refer to Table 2 below, which is the aspheric coefficient of each lens surface of the first embodiment of the present invention. Among them, K is the cone coefficient in the aspheric curve equation, and _A4 to _A16 represent the 4th to 16th order aspheric coefficients of each surface. For example, the cone coefficient K of the object side surface 11a of the first lens 11 is 2.17E+01. The same can be said for the others, which will not be repeated below. In addition, the tables of the following embodiments correspond to the optical photography lens set 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.

In the first embodiment, the thickness of the first lens is CT1, the thickness of the second lens is CT2, the air interval from the first to the second lens is AT12, (CT2-CT1)/AT12=0.162.

In the first embodiment, the focal length of the optical imaging lens set is EFL, the focal length of the first lens is f1, the focal length of the second lens is f2, and (f1+f2)/EFL=39.913.

In the first embodiment, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the optical photographic lens set is EFL, (f2+f3)/EFL=41.870.

In the first embodiment, the radius of curvature of the object surface of the second lens is R3, the focal length of the second lens is f2, and R3/f2=0.019.

In the first embodiment, the focal length of the first lens is f1, the focal length of the second lens is f2, the thickness of the first lens is CT1, the thickness of the second lens is CT2, (f1+f2)/(CT1+CT2)=104.628.

In the first embodiment, the focal length of the second lens is f2, the focal length of the third lens is f3, the thickness of the second lens is CT2, the thickness of the third lens is CT3, (f2+f3)/(CT2+CT3)=57.079.

In the first embodiment, the radius of curvature of the object surface of the second lens is R3, the radius of curvature of the image surface of the second lens is R4, the focal length of the second lens is f2, (R3+R4)/f2=0.037.

In the first embodiment, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the thickness of the third lens is CT3, the thickness of the fourth lens is CT4, (f3+f4)/(CT3+CT4)=-1.018.

In the first embodiment, the radius of curvature of the object surface of the fourth lens is R7, the focal length of the fourth lens is f4, and R7/f4=-0.778.

In the first embodiment, the focal length of the fourth lens is f4, the focal length of the optical photographic lens set is EFL, and f4/EFL=-1.371.

In the first embodiment, the thickness of the third lens is CT3, the thickness of the fourth lens is CT4, and the air interval from the third to the fourth lens is AT34, (CT3-CT4)/AT34=6.805.

In the first embodiment, the air interval between the third and fourth lenses is AT34, the focal length of the optical photographic lens set is EFL, and AT34/EFL=0.046.

In the first embodiment, the focal length of the optical imaging lens set is EFL, the thickness of the first lens is CT1, and EFL/CT1=5.888.

In the first embodiment, the total length of the optical camera lens set is TTL, the air interval between the third and fourth lenses is AT34, and TTL/AT34=50.480.

In the first embodiment, the radius of curvature of the object surface of the first lens is R1, the radius of curvature of the image surface of the first lens is R2, the focal length of the first lens is f1, (R1+R2)/f1=-9.457.

From the numerical values of the above relationship, it can be seen that the optical imaging lens set 10 of the first embodiment meets the requirements of relationship (1) to (15).

See FIG. 1B , which shows, from left to right, the astigmatism field curvature aberration diagram and the f-tanθ distortion aberration diagram of the optical photographic lens set 10. From the astigmatism field curvature aberration diagram (wavelength 940nm), it can be seen that the variation of the aberration in the sagittal direction within the entire field of view is between -0.01 and 0.01mm; the variation of the aberration in the tangential direction within the entire field of view is between 0.01 and 0.03mm. From the f-tanθ distortion aberration diagram (wavelength 940nm), it can be seen that the absolute value of the f-tanθ distortion rate of the optical photographic lens set 10 is less than 4%. It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three infrared lights of 920nm, 940nm, and 960nm wavelengths at different heights can all be concentrated near the imaging point, and the imaging point deviation can be controlled between -0.01 and 0.02mm. As shown in FIG. 1B , the optical camera lens set 10 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system.

Second Embodiment

See FIG. 2A and FIG. 2B. FIG. 2A is a schematic diagram of the optical photographic lens set of the second embodiment of the present invention. FIG. 2B is, from left to right, the astigmatism/field curvature aberration diagram, the f-tanθ distortion diagram, and the longitudinal spherical aberration diagram of the second embodiment of the present invention.

As shown in FIG. 2A , the optical imaging lens set 20 of the second embodiment includes a first lens 21, a second lens 22, an aperture ST, a third lens 23, and a fourth lens 24 in order from the object side to the image side. The optical imaging lens set 20 may further include a filter element 25 and an imaging surface 201. An image sensing element 202 may be further disposed on the imaging surface 201 to form an imaging device (not labeled).

The first lens 21 has negative refractive power, its object side surface 21a is convex, the image side surface 21b is concave, and both the object side surface 21a and the image side surface 21b are aspherical. The material of the first lens 21 includes plastic, but is not limited thereto.

The second lens 22 has positive refractive power, its object side surface 22a is convex, the image side surface 22b is concave, and both the object side surface 22a and the image side surface 22b are aspherical. The material of the second lens 22 includes plastic, but is not limited to this.

The third lens 23 has positive refractive power, and its object side surface 23a is convex, the image side surface 23b is convex, and the object side surface 23a and the image side surface 23b are aspherical. The material of the third lens 23 includes plastic, but is not limited to this.

The fourth lens 24 has negative refractive power, and its object side surface 24a is convex, and its image side surface 24b is concave, and both the object side surface 24a and the image side surface 24b are aspherical. The material of the fourth lens 24 includes plastic, but is not limited to this.

The filter element 25 is disposed between the fourth lens 24 and the imaging surface 201 to filter light in a specific wavelength range to allow the required wavelength to pass through, such as an ultraviolet or far infrared light filter element. The two surfaces 25a and 25b of the filter element 25 are both flat surfaces, and the material is glass.

The image sensor 202 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS image sensor).

The detailed optical data of the optical photographic lens set 20 of the second embodiment and the aspheric coefficient of the lens surface are listed in Table 3 and Table 4 respectively. In the second embodiment, the curve equation of the aspheric surface is expressed in the same form as the first embodiment.

See FIG. 2B , which shows, from left to right, the astigmatism field curvature aberration diagram and the f-tanθ distortion aberration diagram of the optical photographic lens set 20. From the astigmatism field curvature aberration diagram (wavelength 940nm), it can be seen that the variation of the aberration in the sagittal direction within the entire field of view is between -0.02 and -0.01mm; the variation of the aberration in the meridional direction within the entire field of view is between -0.02 and 0.03mm. From the f-tanθ distortion aberration diagram (wavelength 940nm), it can be seen that the absolute value of the f-tanθ distortion rate of the optical photographic lens set 20 is less than 12%. It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three infrared lights of 920nm, 940nm, and 960nm wavelengths at different heights can all be concentrated near the imaging point, and the imaging point deviation can be controlled between -0.02 and 0.01mm. As shown in FIG2B , the optical camera lens set 20 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system.

Third Embodiment

See FIG. 3A and FIG. 3B. FIG. 3A is a schematic diagram of the optical photographic lens set of the third embodiment of the present invention. FIG. 3B is, from left to right, the astigmatism/field curvature aberration diagram, the f-tanθ distortion diagram, and the longitudinal spherical aberration diagram of the third embodiment of the present invention.

As shown in FIG. 3A , the optical imaging lens set 30 of the third embodiment includes a first lens 31, a second lens 32, an aperture ST, a third lens 33, and a fourth lens 34 in order from the object side to the image side. The optical imaging lens set 30 may further include a filter element 35 and an imaging surface 301. An image sensing element 302 may be further disposed on the imaging surface 301 to form an imaging device (not separately labeled).

The first lens 31 has negative refractive power, and its object side surface 31a is convex, and its image side surface 31b is concave, and both the object side surface 31a and the image side surface 31b are aspherical. The material of the first lens 31 includes plastic, but is not limited to this.

The second lens 32 has positive refractive power, and its object side surface 32a is convex, and its image side surface 32b is concave, and both the object side surface 32a and the image side surface 32b are aspherical. The material of the second lens 32 includes plastic, but is not limited to this.

The third lens 33 has positive refractive power, and its object side surface 33a is convex, the image side surface 33b is convex, and the object side surface 33a and the image side surface 33b are aspherical. The material of the third lens 33 includes plastic, but is not limited to this.

The fourth lens 34 has negative refractive power, and its object side surface 34a is convex, and its image side surface 34b is concave, and both the object side surface 34a and the image side surface 34b are aspherical. The material of the fourth lens 34 includes plastic, but is not limited to this.

The filter element 35 is disposed between the fourth lens 34 and the imaging surface 301 to filter light in a specific wavelength range to allow the required wavelength to pass through, such as an ultraviolet and far infrared light filter element to allow visible light and infrared light of a specified wavelength to pass through. The two surfaces 35a and 35b of the filter element 35 are both flat and made of glass.

The image sensor 302 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS image sensor).

The detailed optical data of the optical photographic lens set 30 of the third embodiment and the aspheric coefficient of the lens surface are listed in Table 6 and Table 7 respectively. In the third embodiment, the curve equation of the aspheric surface is expressed in the same form as the first embodiment.

In the third embodiment, the values of the various relational expressions of the optical imaging lens set 30 are listed in Table 8. As can be seen from Table 8, the optical imaging lens set 30 of the third embodiment meets the requirements of relational expressions (1) to (15).

See FIG. 3B , which shows, from left to right, the astigmatism field curvature aberration diagram, the f-tanθ distortion aberration diagram, and the longitudinal spherical aberration diagram of the optical photographic lens set 30. From the astigmatism field curvature aberration diagram (wavelength 940nm), it can be seen that the variation of the aberration in the sagittal direction within the entire field of view is -0.01mm; the variation of the aberration in the meridional direction within the entire field of view is between -0.01 and 0.02mm. From the f-tanθ distortion aberration diagram (wavelength 940nm), it can be seen that the absolute value of the f-tanθ distortion rate of the optical photographic lens set 30 is less than 8%. It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three infrared lights of 920nm, 940nm, and 960nm wavelengths at different heights can all be concentrated near the imaging point, and the imaging point deviation can be controlled between -0.01 and 0.01mm. As shown in FIG. 3B , the optical camera lens set 30 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system.

Fourth embodiment

See FIG. 4A and FIG. 4B. FIG. 4A is a schematic diagram of the optical imaging lens set of the fourth embodiment of the present invention. FIG. 4B is, from left to right, the astigmatism/field curvature aberration diagram, the f-tanθ distortion diagram, and the longitudinal spherical aberration diagram of the fourth embodiment of the present invention.

As shown in FIG. 4A , the optical imaging lens set 40 of the fourth embodiment includes a first lens 41, a second lens 42, an aperture ST, a third lens 43, and a fourth lens 44 in order from the object side to the image side. The optical imaging lens set 40 may further include a filter element 45 and an imaging surface 401. An image sensing element 402 may be further disposed on the imaging surface 401 to form an imaging device (not separately labeled).

The first lens 41 has negative refractive power, and its object side surface 41a is convex, and its image side surface 41b is concave, and both the object side surface 41a and the image side surface 41b are aspherical. The material of the first lens 41 includes plastic, but is not limited thereto.

The second lens 42 has positive refractive power, and its object side surface 42a is convex, and its image side surface 42b is concave, and both the object side surface 42a and the image side surface 42b are aspherical. The material of the second lens 42 includes plastic, but is not limited to this.

The third lens 43 has positive refractive power, and its object side surface 43a is convex, the image side surface 43b is convex, and the object side surface 43a and the image side surface 43b are aspherical. The material of the third lens 43 includes plastic, but is not limited thereto.

The fourth lens 44 has negative refractive power, and its object side surface 44a is convex, and its image side surface 44b is concave, and both the object side surface 44a and the image side surface 44b are aspherical. The material of the fourth lens 44 includes plastic, but is not limited thereto.

The filter element 45 is disposed between the fourth lens 44 and the imaging surface 401 to filter light in a specific wavelength range to allow the required wavelength to pass through, such as an ultraviolet and far infrared light filter element to allow visible light and infrared light of a specified wavelength to pass through. The two surfaces 45a and 45b of the filter element 45 are both flat and made of glass.

The image sensor 402 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS image sensor).

The detailed optical data of the optical photographic lens set 40 of the fourth embodiment and the aspheric coefficient of the lens surface are listed in Table 9 and Table 10 respectively. In the fourth embodiment, the curve equation of the aspheric surface is expressed in the same form as the first embodiment.

表十

Table 10

In the fourth embodiment, the values of the various relational expressions of the optical imaging lens set 40 are listed in Table 9. As can be seen from Table 9, the optical imaging lens set 40 of the fourth embodiment meets the requirements of relational expressions (1) to (15).

See FIG. 4B , which shows, from left to right, the astigmatism field curvature aberration diagram, the f-tanθ distortion aberration diagram, and the longitudinal spherical aberration diagram of the optical photographic lens set 40. From the astigmatism field curvature aberration diagram (wavelength 940nm), it can be seen that the variation of the aberration in the sagittal direction is between -0.03 and -0.02mm in the entire field of view; the variation of the aberration in the meridional direction is within the range of -0.03 to 0.02mm in the entire field of view. From the f-tanθ distortion aberration diagram (wavelength 940nm), it can be seen that the absolute value of the f-tanθ distortion rate of the optical photographic lens set 40 is less than 13%. . It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three infrared light wavelengths of 920nm, 940nm, and 960nm at different heights can all be concentrated near the imaging point, and the imaging point deviation can be controlled between -0.01 and 0.02mm. As shown in FIG. 4B , the optical camera lens set 40 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system.

Fifth embodiment

See FIG. 5A and FIG. 5B. FIG. 5A is a schematic diagram of the optical photographic lens set of the fifth embodiment of the present invention. FIG. 5B is an astigmatism/Field Curvature diagram, f-tanθ distortion diagram, and longitudinal spherical aberration diagram of the fifth embodiment of the present invention.

As shown in FIG. 5A , the optical imaging lens set 50 of the fifth embodiment includes a first lens 51, a second lens 52, an aperture ST, a third lens 53, and a fourth lens 54 in order from the object side to the image side. The optical imaging lens set 50 may further include a filter element 55 and an imaging surface 501. An image sensing element 502 may be further disposed on the imaging surface 501 to form an imaging device (not separately labeled).

The first lens 51 has negative refractive power, and its object side surface 51a is convex, and its image side surface 51b is concave, and both the object side surface 51a and the image side surface 51b are aspherical. The material of the first lens 51 includes plastic, but is not limited to this.

The second lens 52 has positive refractive power, and its object side surface 52a is convex, and the image side surface 52b is concave, and both the object side surface 52a and the image side surface 52b are aspherical. The material of the second lens 52 includes plastic, but is not limited to this.

The third lens 53 has positive refractive power, and its object side surface 53a is convex, the image side surface 53b is convex, and the object side surface 53a and the image side surface 53b are aspherical. The material of the third lens 53 includes plastic, but is not limited to this.

The fourth lens 54 has negative refractive power, and its object side surface 54a is convex, and its image side surface 54b is concave, and both the object side surface 54a and the image side surface 54b are aspherical. The material of the fourth lens 54 includes plastic, but is not limited thereto.

The filter element 55 is disposed between the fourth lens 54 and the imaging surface 501 to filter light in a specific wavelength range to allow the required wavelength to pass through, such as an ultraviolet and far infrared light filter element to allow visible light and infrared light of a specified wavelength to pass through. The two surfaces 55a and 55b of the filter element 55 are both flat and made of glass.

The image sensor 502 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS image sensor).

The detailed optical data of the optical photographic lens set 50 of the fifth embodiment and the aspheric coefficient of the lens surface are listed in Table 12 and Table 13 respectively. In the fifth embodiment, the curve equation of the aspheric surface is expressed in the same form as the first embodiment.

In the fifth embodiment, the values of the various relational expressions of the optical imaging lens set 50 are listed in Table 14. As can be seen from Table 14, the optical imaging lens set 50 of the fifth embodiment meets the requirements of relational expressions (1) to (15).

See FIG. 5B , which shows, from left to right, the astigmatism field curvature aberration diagram, the f-tanθ distortion aberration diagram, and the longitudinal spherical aberration diagram of the optical photographic lens set 50. From the astigmatism field curvature aberration diagram (wavelength 940nm), it can be seen that the variation of the aberration in the sagittal direction is within -0.01mm to 0.00mm within the entire field of view; the variation of the aberration in the meridional direction is within ±0.02mm within the entire field of view. From the f-tanθ distortion aberration diagram (wavelength 940nm), it can be seen that the absolute value of the f-tanθ distortion rate of the optical photographic lens set 50 is less than 20%. From the longitudinal spherical aberration diagram, it can be seen that the off-axis rays of the three infrared lights of 920nm, 940nm, and 960nm wavelengths at different heights can all be concentrated near the imaging point, and the imaging point deviation can be controlled between -0.03 and 0.01mm. As shown in FIG. 5B , the optical camera lens set 50 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system.

Sixth embodiment

See FIG. 6A and FIG. 6B. FIG. 6A is a schematic diagram of the optical photographic lens set of the sixth embodiment of the present invention. FIG. 6B is an astigmatism/Field Curvature, f-tanθ distortion diagram, and longitudinal spherical aberration diagram of the sixth embodiment of the present invention.

As shown in FIG. 6A , the optical imaging lens set 60 of the sixth embodiment includes a first lens 61, a second lens 62, an aperture ST, a third lens 63, and a fourth lens 64 in order from the object side to the image side. The optical imaging lens set 60 may further include a filter element 65 and an imaging surface 601. An image sensing element 602 may be further disposed on the imaging surface 601 to form an imaging device (not labeled).

The first lens 61 has negative refractive power, its object side surface 61a is convex, its image side surface 61b is concave, and both the object side surface 61a and the image side surface 61b are aspherical. The material of the first lens 61 includes plastic, but is not limited thereto.

The second lens 62 has positive refractive power, its object side surface 62a is convex, the image side surface 62b is concave, and both the object side surface 62a and the image side surface 62b are aspherical. The material of the second lens 62 includes plastic, but is not limited to this.

The third lens 63 has positive refractive power, its object side surface 63a is convex, its image side surface 63b is concave, and the object side surface 63a and the image side surface 63b are aspherical. The material of the third lens 63 includes plastic, but is not limited to this.

The fourth lens 64 has negative refractive power, its object side surface 64a is convex, its image side surface 64b is concave, and both the object side surface 64a and the image side surface 64b are aspherical. The material of the fourth lens 64 includes plastic, but is not limited thereto.

The filter element 65 is disposed between the fourth lens 64 and the imaging surface 601 to filter light in a specific wavelength range to allow the required wavelength to pass through, such as an ultraviolet and far infrared light filter element to allow visible light and infrared light of a specified wavelength to pass through. The two surfaces 65a and 65b of the filter element 65 are both flat and made of glass.

The image sensor 602 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS image sensor).

The detailed optical data of the optical photographic lens set 60 of the sixth embodiment and the aspheric coefficient of the lens surface are listed in Table 15 and Table 16 respectively. In the sixth embodiment, the curve equation of the aspheric surface is expressed in the same form as the first embodiment.

表十五

Table 15

In the sixth embodiment, the values of the various relational expressions of the optical imaging lens set 60 are listed in Table 17. As can be seen from Table 17, the optical imaging lens set 60 of the sixth embodiment meets the requirements of relational expressions (1) to (15).

See FIG. 6B , which shows, from left to right, the astigmatism field curvature aberration diagram, the f-tanθ distortion aberration diagram, and the longitudinal spherical aberration diagram of the optical photographic lens set 60. From the astigmatism field curvature aberration diagram (wavelength 940nm), it can be seen that the variation of the aberration in the sagittal direction within the entire field of view is between -0.03 and -0.01mm; the variation of the aberration in the meridional direction within the entire field of view is between -0.04 and 0.00mm. From the f-tanθ distortion aberration diagram (wavelength 940nm), it can be seen that the absolute value of the f-tanθ distortion rate of the optical photographic lens set 60 is less than 20%. It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three infrared light wavelengths of 920nm, 940nm, and 960nm at different heights can all be concentrated near the imaging point, and the imaging point deviation can be controlled between -0.03 and 0.01mm. As shown in FIG. 6B , the optical camera lens set 60 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system.

Seventh embodiment

7 , an imaging device 1010 includes the optical imaging lens set 10, 20, 30, 40, 50, 60 of the first to sixth embodiments described above, and an image sensing element 102, 202, 302, 402, 502, 602; wherein the image sensing element 102, 202, 302, 402, 502, 602 is disposed on the imaging surface 101, 201, 301, 401, 501, 601 of the optical imaging lens set 10, 20, 30, 40, 50, 60. Image sensing elements 102, 202, 302, 402, 502, 602 are, for example, charge-coupled devices (CCD) or complementary metal oxide semiconductor (CMOS) image sensing elements.

In FIG. 7 , the general electronic device 1000 of the seventh embodiment of the present invention includes an imaging device 1010, wherein the general electronic device 1000 can be applied to general 3C products and other electronic products with imaging functions.

Although the present invention is illustrated by the aforementioned several embodiments, these embodiments are not intended to limit the scope of the present invention. For anyone familiar with this technology, 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 contents of the embodiments disclosed in the present invention. Therefore, it should be understood here that the present invention is defined by the following patent application scope, and any changes made within the patent application scope or its equivalent scope should still fall within the patent application scope of the present invention.

10: Optical photography lens set

11: First lens

12: Second lens

13: The third lens

14: The fourth lens

15: Filter element

101: Imaging surface

11a: Object side of the first lens

11b: Image side of the first lens

12a: The side of the second lens

12b: Image side of the second lens

13a: The side of the third lens

13b: Image side of the third lens

14a: The side of the fourth lens

14b: Image side of the fourth lens

15a, 15b: Two surfaces of the filter element

102: Image sensor element

I: Optical axis

ST: aperture

Claims (17)

An optical photographic lens set, which comprises, from the object side to the image side, a first lens having a negative refractive power, a convex object side surface and a concave image side surface; a second lens having a positive refractive power, a convex object side surface and a concave image side surface; an aperture; a third lens having a positive refractive power, a convex object side surface and a convex image side surface; a fourth lens having a negative refractive power, a convex object side surface and a concave image side surface; wherein the thickness of the first lens is CT1 , the thickness of the second lens is CT2, the air interval from the first to the second lens is AT12, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the optical photographic lens set is EFL, and the radius of curvature of the object surface of the second lens is R3, which satisfies the following relationship: -0.4<(CT2-CT1)/AT12<1.1; 4<(f1+f2)/EFL<83; and 0.011<R3/f2<0.13. An optical photographic lens set comprises, from the object side to the image side, a first lens having a negative refractive power, a convex object side surface and a concave image side surface; a second lens having a positive refractive power, a convex object side surface and a concave image side surface; an aperture; a third lens having a positive refractive power, a convex object side surface and a convex image side surface; a fourth lens having a negative refractive power, a convex object side surface and a concave image side surface; wherein the first lens has a thickness of CT1, The thickness of the second lens is CT2, the air interval from the first to the second lens is AT12, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the optical photographic lens set is EFL, and the radius of curvature of the object surface of the second lens is R3, which satisfies the following relationships: -0.4<(CT2-CT1)/AT12<1.1; 6<(f2+f3)/EFL<85; and 0.011<R3/f2<0.13. For example, in the optical photographic lens set of item 1 or item 2 of the patent application, the focal length of the first lens is f1, the focal length of the second lens is f2, the thickness of the first lens is CT1, and the thickness of the second lens is CT2, the following relationship is satisfied: 8<(f1+f2)/(CT1+CT2)<193. For example, in the optical photographic lens set of item 1 or item 2 of the patent application, the focal length of the second lens is f2, the focal length of the third lens is f3, the thickness of the second lens is CT2, and the thickness of the third lens is CT3, the following relationship is satisfied: 5<(f2+f3)/(CT2+CT3)<95. For example, in the optical photographic lens set of item 1 or item 2 of the patent application, the radius of curvature of the object surface of the second lens is R3, the radius of curvature of the image surface of the second lens is R4, and the focal length of the second lens is f2, the following relationship is satisfied: 0.02<(R3+R4)/f2<0.3. For example, in the optical photographic lens set of item 1 or item 2 of the patent application, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the thickness of the third lens is CT3, and the thickness of the fourth lens is CT4, the following relationship is satisfied: -1.6<(f3+f4)/(CT3+CT4)<-0.5. For example, in the optical photographic lens set of item 1 or item 2 of the patent application, the radius of curvature of the object surface of the fourth lens is R7, and the focal length of the fourth lens is f4, which satisfies the following relationship: -0.9<R7/f4<-0.5. For example, in the optical photographic lens set of item 1 or item 2 of the patent application, the focal length of the fourth lens is f4, and the focal length of the optical photographic lens set is EFL, which satisfies the following relationship: -2.2<f4/EFL<-1.1. For example, in the optical photographic lens set of item 1 or item 2 of the patent application, the thickness of the third lens is CT3, the thickness of the fourth lens is CT4, and the air interval between the third and fourth lenses is AT34, which satisfies the following relationship: 4<(CT3-CT4)/AT34<29. For example, in the optical photographic lens set of item 1 or item 2 of the patent application, the air interval between the third and fourth lenses is AT34, and the focal length EFL of the optical photographic lens set satisfies the following relationship: 0.019<AT34/EFL<0.057. For example, the optical photographic lens set of item 1 or item 2 of the patent application scope, wherein the focal length of the optical lens set is EFL, and the thickness of the first lens is CT1, which satisfies the following relationship: 4.2<EFL/CT1<9.1. For example, in the optical photographic lens set of item 1 or item 2 of the patent application, the total length of the optical photographic lens set is TTL, and the air interval between the third and fourth lenses is AT34, which satisfies the following relationship: 42<TTL/AT34<117. For example, in the optical photographic lens set of item 1 or item 2 of the patent application, the radius of curvature of the object surface of the first lens is R1, the radius of curvature of the image surface of the first lens is R2, and the focal length of the first lens is f1, which satisfies the following relationship: -12<(R1+R2)/f1<-2.4. For example, in the optical photographic lens set of item 1 or item 2 of the patent application scope, the refractive indexes of the first lens to the fourth lens are the same. For example, in the optical photographic lens set of item 1 or item 2 of the patent application scope, the dispersion coefficients of the first lens to the fourth lens are the same. An imaging device, comprising an optical imaging lens set as in item 1 or item 2 of the patent application scope and an image sensing element, wherein the image sensing element is disposed on the imaging surface of the optical imaging lens set. An electronic device comprising an imaging device as described in claim 16.

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