CN105807408A - Optical camera lens assembly, image capturing device and electronic device - Google Patents

Abstract

The invention discloses an optical camera lens group, an image capturing device and an electronic device. The optical image capturing lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element with positive refractive power has an object-side surface being convex at a paraxial region thereof. The second lens element has refractive power. The third lens element with refractive power. The fourth lens element with refractive power. The fifth lens element with refractive power has a convex image-side surface at a paraxial region, and both the object-side surface and the image-side surface thereof are aspheric. The sixth lens element with refractive power has an object-side surface and an image-side surface which are aspheric. The invention also discloses an image capturing device with the optical camera lens group and an electronic device with the image capturing device. When the specific conditions are met, the optical shooting lens group has better long-range shooting capability.

Description

Optical camera lens group, imaging device and electronic device

technical field

The invention relates to an optical camera lens group and an image pickup device, and in particular to a miniaturized optical camera lens group and an image pickup device applied to an electronic device.

Background technique

In recent years, with the rise of electronic products with photographic functions, the demand for optical systems has increased day by day. The photosensitive element of a general optical system is nothing more than a photosensitive coupling device (Charge Coupled Device, CCD) or a complementary metal oxide semiconductor element (Complementary Metal-Oxide Semiconductor Sensor, CMOS Sensor), and with the advancement of semiconductor technology, the pixel size of the photosensitive element Zooming out, the optical system is gradually developing towards the high-pixel field, so the requirements for imaging quality are also increasing.

Traditional optical systems mounted on electronic products mostly use four-element or five-element lens structures. However, due to the prevalence of high-standard mobile devices such as smart phones (SmartPhone) and tablet computers (Tablet PC), the optical system is driven by pixels and imaging. With the rapid increase in quality, known optical systems will not be able to meet higher-level photographic systems.

Although the six-element optical system has been further developed at present, the refractive power of the overall optical system cannot be effectively moved toward the object side due to the configuration of the refractive power of the first lens, which leads to the fact that the optical system cannot be shortened at the same time under the configuration of a small viewing angle. back focus, and prone to stray light. Furthermore, the configuration of the fifth lens cannot reduce the generation of stray light, resulting in poor overall imaging quality.

Contents of the invention

The object of the present invention is to provide an optical imaging lens group, an imaging device and an electronic device. The first lens is configured with a positive refractive power, which can move the refractive power of the entire optical imaging lens group toward the object side, which is beneficial to a small viewing angle. Under the configuration, the back focal length is shortened and the change of refraction angle is slowed down when the light enters the optical imaging lens group, so as to avoid the generation of stray light such as surface reflection. Furthermore, the surface shape of the fifth lens at the near optical axis on the image side surface can slow down the shape change of the fifth lens, reduce the generation of stray light, and improve the formability of the lens.

According to the present invention, an optical imaging lens group is provided, which sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from the object side to the image side. The first lens has positive refractive power, and its object-side surface is convex near the optical axis. The second lens has refractive power. The third lens has refractive power. The fourth lens has refractive power. The fifth lens has refractive power, its image-side surface near the optical axis is convex, and its object-side surface and image-side surface are both aspherical. The sixth lens has refractive power, and its object-side surface and image-side surface are both aspherical. There are six lenses with refractive power in the optical camera lens group, and there is a distance between any two adjacent lenses with refractive power, and there is no relative movement between the lenses with refractive power, and the optical camera lens group also includes An aperture is arranged between the subject and the third lens, the focal length of the optical imaging lens group is f, the maximum image height of the optical imaging lens group is ImgH, and the radius of curvature of the fifth lens image side surface is R10, which satisfies the following conditions :

2.0<f/ImgH; and

-1.25<R10/f<0.

According to the present invention, there is further provided an image capturing device, comprising the optical imaging lens group and the electronic photosensitive element as mentioned in the preceding paragraph, wherein the electronic photosensitive element is arranged on the imaging surface of the optical imaging lens group.

According to the present invention, there is also provided an electronic device, including the imaging device as mentioned in the preceding paragraph.

According to the present invention, there is also provided an optical imaging lens group, which sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from the object side to the image side. The first lens has positive refractive power, and its object-side surface is convex near the optical axis. The second lens has refractive power. The third lens has refractive power. The fourth lens has refractive power. The fifth lens has refractive power, its image-side surface near the optical axis is convex, and its object-side surface and image-side surface are both aspherical. The sixth lens has refractive power, its image-side surface is concave near the optical axis, and its object-side surface and image-side surface are both aspherical. There are six lenses with refractive power in the optical camera lens group, and there is a distance between any two adjacent lenses with refractive power, and there is no relative movement between the lenses with refractive power. Comprising an aperture, arranged between an object and the third lens, the focal length of the optical imaging lens group is f, the maximum image height of the optical imaging lens group is ImgH, and the radius of curvature of the image side surface of the fifth lens is R10, which meets the following conditions:

2.0<f/ImgH; and

R10/f<0.

When f/ImgH satisfies the above conditions, the light beam incident to the optical camera lens group can be controlled so that its focus range is concentrated on a specific area in the distance, so as to improve the ability to capture high-resolution images in the specific area, so that It has better telephoto capabilities.

When R10/f satisfies the above conditions, the surface shape of the image-side surface of the fifth lens near the optical axis can slow down the shape change of the fifth lens, reduce the generation of stray light, and improve the formability of the lens.

Description of drawings

FIG. 1 shows a schematic diagram of an imaging device according to a first embodiment of the present invention;

Figure 2 is the spherical aberration, astigmatism and distortion curves of the first embodiment in order from left to right;

3 shows a schematic diagram of an imaging device according to a second embodiment of the present invention;

Fig. 4 is the spherical aberration, astigmatism and distortion curves of the second embodiment in order from left to right;

5 shows a schematic diagram of an imaging device according to a third embodiment of the present invention;

Fig. 6 is the spherical aberration, astigmatism and distortion curves of the third embodiment in sequence from left to right;

7 is a schematic diagram of an imaging device according to a fourth embodiment of the present invention;

Fig. 8 is the spherical aberration, astigmatism and distortion curves of the fourth embodiment in order from left to right;

9 is a schematic diagram of an imaging device according to a fifth embodiment of the present invention;

Fig. 10 is the spherical aberration, astigmatism and distortion curves of the fifth embodiment in sequence from left to right;

11 is a schematic diagram of an imaging device according to a sixth embodiment of the present invention;

Figure 12 is the spherical aberration, astigmatism and distortion curves of the sixth embodiment in sequence from left to right;

Fig. 13 depicts a schematic diagram of the first lens parameters Dr1s and Dsr2 of the optical imaging lens group in the embodiment of Fig. 1;

14 is a schematic diagram of an electronic device according to a seventh embodiment of the present invention;

FIG. 15 is a schematic diagram of an electronic device according to an eighth embodiment of the present invention; and

FIG. 16 is a schematic diagram of an electronic device according to a ninth embodiment of the present invention.

【Symbol Description】

Electronics: 10, 20, 30

Image taking device: 11, 21, 31

First lens: 110, 210, 310, 410, 510, 610

Object side surface: 111, 211, 311, 411, 511, 611

Image side surface: 112, 212, 312, 412, 512, 612

Second lens: 120, 220, 320, 420, 520, 620

Object side surface: 121, 221, 321, 421, 521, 621

Image side surface: 122, 222, 322, 422, 522, 622

Third lens: 130, 230, 330, 430, 530, 630

Object side surface: 131, 231, 331, 431, 531, 631

Image side surface: 132, 232, 332, 432, 532, 632

Fourth lens: 140, 240, 340, 440, 540, 640

Object side surface: 141, 241, 341, 441, 541, 641

Image side surface: 142, 242, 342, 442, 542, 642

Fifth lens: 150, 250, 350, 450, 550, 650

Object side surface: 151, 251, 351, 451, 551, 651

Image side surface: 152, 252, 352, 452, 552, 652

Sixth lens: 160, 260, 360, 460, 560, 660

Object side surface: 161, 261, 361, 461, 561, 661

Image side surface: 162, 262, 362, 462, 562, 662

Infrared filter elements: 170, 270, 370, 470, 570, 670

Flat glass: 575

Imaging surface: 180, 280, 380, 480, 580, 680

Electronic photosensitive element: 190, 290, 390, 490, 590, 690

f: focal length of optical camera lens group

Fno: the aperture value of the optical camera lens group

HFOV: half of the maximum angle of view in the optical camera lens group

Dr1s: the distance from the object side surface of the first lens to the aperture on the optical axis

Dsr2: the distance from the aperture to the image side surface of the first lens on the optical axis

ΣAT: the sum of the distances between the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens on the optical axis between two adjacent lenses

T12: the distance between the first lens and the second lens on the optical axis

T23: the distance between the second lens and the third lens on the optical axis

SL: the distance from the aperture to the imaging surface on the optical axis

TL: the distance from the object-side surface of the first lens to the imaging plane on the optical axis

ImgH: the maximum image height of the optical camera lens group

R10: Radius of curvature of the image-side surface of the fifth lens

V1: Dispersion coefficient of the first lens

V2: Dispersion coefficient of the second lens

V3: Dispersion coefficient of the third lens

V4: Dispersion coefficient of the fourth lens

V5: Dispersion coefficient of the fifth lens

V6: Dispersion coefficient of the sixth lens

detailed description

An optical imaging lens group, which sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from the object side to the image side, wherein the optical imaging lens group has a refractive power There are six lenses, and there is no relative movement among the lenses with refractive power. The optical camera lens group also includes an aperture, which is arranged between the subject and the third lens.

In the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens of the optical imaging lens group mentioned in the previous paragraph, there is a distance between any two adjacent lenses with refractive power; That is to say, the optical camera lens group has six single non-cemented lenses. Since the manufacturing process of cemented lenses is more complicated than that of non-cemented lenses, especially the bonding surface of the two lenses must have a high-precision curved surface in order to achieve high adhesion when the two lenses are bonded, and during the bonding process, it may also be caused by misalignment Poor fit affects the overall optical imaging quality. Therefore, in the optical imaging lens group of the present invention, there is a distance between any two adjacent lenses with refractive power, which can effectively improve the problems caused by cemented lenses.

The first lens has positive refractive power, and its object-side surface is convex near the optical axis. In this way, the refractive power of the overall optical imaging lens group can be moved toward the object side, which is beneficial to shorten the back focal length and slow down the change of refraction angle when the light enters the optical imaging lens group under the configuration of small viewing angle, so as to avoid stray light such as surface reflection generation.

The second lens can have negative refractive power, so as to correct the aberration of the optical camera lens group and improve the imaging quality.

The image-side surface of the third lens near the optical axis may be concave, which helps to correct the aberration of the optical camera lens group.

The fifth lens can have positive refractive power, and its image-side surface near the optical axis is convex. Thereby, the sensitivity of the optical imaging lens group can be effectively reduced, and the shape of the fifth lens at the near optical axis of the image side surface can be used to slow down the shape change of the fifth lens, reduce the generation of stray light, and improve the formability of the lens.

The image-side surface of the sixth lens can be concave near the optical axis and have at least one convex surface off the axis. In this way, the principal point (PrincipalPoint) of the optical imaging lens group can be kept away from the imaging surface, which is beneficial to shorten the back focal length to maintain miniaturization, and can effectively suppress the incident angle of light in the off-axis field of view, making the response of the electronic photosensitive element Efficiency improvement.

Among the object-side surfaces and image-side surfaces of the first lens, the second lens, the third lens, the fourth lens and the fifth lens of the aforementioned optical imaging lens group, at least three surfaces have at least one inflection point. Thereby, the astigmatism and the aberration of the off-axis field of view can be effectively corrected.

In addition, at least three lenses among the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens of the aforementioned optical imaging lens group have negative refractive power. Thereby, it is helpful to correct the aberration of the overall optical imaging lens group, so as to maintain the imaging quality.

The focal length of the optical imaging lens group is f, and the maximum image height of the optical imaging lens group is ImgH, which satisfies the following condition: 2.0<f/ImgH. In this way, the light beam incident to the optical camera lens group can be controlled so that its focus range is concentrated on a specific area in the distance, so as to improve the ability to capture high-resolution images in the specific area, so that it has a better distance Mirror shooting (Telephoto) capability. Preferably, the following condition can be satisfied: 2.15<f/ImgH<3.5.

The radius of curvature of the image-side surface of the fifth lens is R10, the focal length of the optical imaging lens group is f, and R10/f<0. Thereby, the surface shape of the image-side surface of the fifth lens at the near optical axis can slow down the shape change of the fifth lens, reduce the generation of stray light, and improve the formability of the lens. Preferably, it satisfies the following condition: -1.25<R10/f<0. More preferably, it satisfies the following condition: -1.0<R10/f<-0.1.

Half of the maximum viewing angle in the optical imaging lens group is HFOV, which satisfies the following conditions: 10.0 degrees<HFOV<25.0 degrees. Thereby, an appropriate viewing angle and imaging range can be obtained, and the generation of stray light can be avoided.

The sum of the distances between the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens on the optical axis of each two adjacent lenses is ΣAT, and the distance between the first lens and the second lens is The separation distance on the axis is T12, and the separation distance between the second lens and the third lens on the optical axis is T23, which satisfies the following condition: 5.0<ΣAT/(T12+T23). Thereby, the assembly of the lens is facilitated to improve the production yield.

The distance between the first lens object side surface and the aperture on the optical axis is Dr1s (if the point on the optical axis of the first lens object side surface is closer to the object side than the aperture center point, Dr1s is a positive value; if the first lens object side The point on the surface on the optical axis is closer to the image side than the center point of the aperture, and Dr1s is a negative value), and the distance from the aperture to the image side surface of the first lens on the optical axis is Dsr2 (if the center point of the aperture is closer to the image side surface of the first lens The point on the optical axis is close to the object side, and Dsr2 is a positive value; if the center point of the aperture is closer to the image side than the point on the optical axis of the image side surface of the first lens, Dsr2 is a negative value), which satisfies the following conditions: 0.60<Dr1s /Dsr2. In this way, the refractive power of the optical imaging lens group can be moved forward through the first lens, slowing down the change of the refraction angle when light enters, which is beneficial to reducing stray light.

The focal length of the optical imaging lens group is f, and the distance on the optical axis from the object-side surface of the first lens to the imaging plane is TL, which satisfies the following conditions: 0.70<TL/f<1.15. Thereby, the miniaturization of the optical imaging lens group can be effectively maintained.

The distance from the aperture to the imaging surface on the optical axis is SL, and the distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, which satisfy the following conditions: 0.85<SL/TL<1.05. Thereby, a good balance can be achieved in the characteristics of telecentricity and wide-angle, so that the total length of the optical imaging lens group will not be too long.

The dispersion coefficient of the first lens is V1, the dispersion coefficient of the second lens is V2, the dispersion coefficient of the third lens is V3, the dispersion coefficient of the fourth lens is V4, the dispersion coefficient of the fifth lens is V5, and the dispersion coefficient of the sixth lens is V5. The coefficient is V6, wherein at least two of V1, V2, V3, V4, V5, and V6 are less than 27. Thereby, it is helpful to correct the chromatic aberration of the optical imaging lens group.

In the optical imaging lens group provided by the present invention, the material of the lens can be plastic or glass. When the material of the lens is plastic, the production cost can be effectively reduced. In addition, when the material of the lens is glass, the degree of freedom in the configuration of the refractive power of the optical camera lens group can be increased. In addition, the object-side surface and the image-side surface in the optical imaging lens group can be aspherical (ASP), and the aspheric surface can be easily made into a shape other than a spherical surface, and more control variables are obtained to reduce aberrations and reduce lens size. Therefore, the total length of the optical imaging lens group of the present invention can be effectively reduced.

Furthermore, in the optical imaging lens group provided by the present invention, if the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at the near optical axis; if the lens surface is concave and the concave position is not defined , it means that the lens surface is concave at the near optical axis. In the imaging lens system provided by the present invention, if the lens has positive refractive power or negative refractive power, or the focal length of the lens, it refers to the refractive power or focal length of the lens near the optical axis.

In addition, in the optical imaging lens group of the present invention, at least one aperture can be provided as required to reduce stray light and improve image quality.

The imaging surface of the optical imaging lens group of the present invention can be a plane or a curved surface with any curvature, especially a curved surface with a concave surface facing the object side, depending on the corresponding electronic photosensitive element.

In the optical imaging lens group of the present invention, the aperture configuration can be a front aperture or a middle aperture, wherein the front aperture means that the aperture is set between the subject and the first lens, and the middle aperture means that the aperture is set on the first lens and the imaging surface. If the aperture is a front aperture, it can make the exit pupil (ExitPupil) of the optical camera lens group and the imaging surface have a longer distance, so that it has a telecentric (Telecentric) effect, and can increase the CCD or CMOS receiving image of the electronic photosensitive element The efficiency; if it is a central aperture, it will help to expand the field of view of the system, so that the optical camera lens group has the advantage of a wide-angle lens.

The present invention can also be applied in various aspects to electronic devices such as three-dimensional (3D) image capture, digital cameras, mobile products, tablet computers, smart TVs, network monitoring equipment, somatosensory game consoles, driving recorders, reversing developing devices, and wearable products. middle.

The present invention provides an image-capturing device, comprising the aforementioned optical imaging lens group and an electronic photosensitive element, wherein the electronic photosensitive element is arranged on the imaging surface of the optical imaging lens group. Through the configuration of the positive refractive power of the first lens in the optical imaging lens group, the refractive power of the overall optical imaging lens group can be moved toward the object side, which is conducive to shortening the back focal length and slowing down the light entering the optical imaging lens group under the configuration of a small viewing angle. Changes in the refraction angle to avoid the generation of stray light such as surface reflection. Furthermore, the surface shape of the image-side surface of the fifth lens near the optical axis of the optical imaging lens group can slow down the shape change of the fifth lens, reduce the generation of stray light, and improve the formability of the lens. Preferably, the imaging device may further include a barrel (BarrelMember), a supporting device (HolderMember) or a combination thereof.

The present invention provides an electronic device, including the aforementioned image capturing device. Thereby, image quality is improved. Preferably, the electronic device may further include a control unit (ControlUnit), a display unit (Display), a storage unit (StorageUnit), a random access memory (RAM) or a combination thereof.

According to the above implementation manners, specific embodiments are proposed below and described in detail with reference to the accompanying drawings.

<First embodiment>

Please refer to FIG. 1 and FIG. 2, wherein FIG. 1 shows a schematic diagram of an imaging device according to the first embodiment of the present invention, and FIG. 2 shows the spherical aberration, astigmatism and distortion of the first embodiment in order from left to right Graph. As can be seen from FIG. 1 , the image capturing device of the first embodiment includes an optical imaging lens group (not labeled separately) and an electronic photosensitive element 190 . The optical imaging lens group includes an aperture 100, a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, an infrared filter The optical element 170 and the imaging surface 180, and the electronic photosensitive element 190 is arranged on the imaging surface 180 of the optical imaging lens group, wherein there are six lenses (110-160) with refractive power in the optical imaging lens group, and any two adjacent There is a distance between the lenses with refractive power, and the lenses with refractive power do not move relative to each other.

The first lens 110 has positive refractive power and is made of plastic material. The object-side surface 111 is convex near the optical axis, and the image-side surface 112 is concave near the optical axis. Both are aspherical.

The second lens 120 has negative refractive power and is made of plastic material. The object-side surface 121 is convex near the optical axis, and the image-side surface 122 is concave near the optical axis, both of which are aspherical. In addition, both the object-side surface 121 and the image-side surface 122 of the second lens have at least one inflection point.

The third lens 130 has positive refractive power and is made of plastic material. The object-side surface 131 is convex near the optical axis, and the image-side surface 132 is convex near the optical axis, both of which are aspherical. In addition, both the object-side surface 131 and the image-side surface 132 of the third lens have at least one inflection point.

The fourth lens 140 has positive refractive power and is made of plastic material. The object-side surface 141 is convex near the optical axis, and the image-side surface 142 is concave near the optical axis, both of which are aspherical. In addition, both the object-side surface 141 and the image-side surface 142 of the fourth lens have at least one inflection point.

The fifth lens 150 has positive refractive power and is made of plastic material. The object-side surface 151 is concave near the optical axis, and the image-side surface 152 is convex near the optical axis, both of which are aspherical. In addition, the image-side surface 152 of the fifth lens has at least one inflection point.

The sixth lens 160 has negative refractive power and is made of plastic material. The object-side surface 161 is concave near the optical axis, and the image-side surface 162 is concave near the optical axis, both of which are aspherical. In addition, the image-side surface 162 of the sixth lens has at least one convex surface off-axis.

The infrared filter element 170 is made of glass, and it is disposed between the sixth lens 160 and the imaging surface 180 and does not affect the focal length of the optical camera lens group.

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

$\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; Y</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; Y</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; R</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; /</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; sqrt</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; k</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span>{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; Y</span>}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; R</span>}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\underset{\mathrm{<span\; class="notranslate">\; i</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; Ai</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; Y</span>}}^{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ;</span>$

in:

X: The point on the aspheric surface whose distance from the optical axis is Y, and its relative distance from the intersection point tangent to the aspheric optical axis;

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

R: radius of curvature;

k: cone coefficient; and

Ai: i-th order aspherical coefficient.

In the optical imaging lens group of the first embodiment, the focal length of the optical imaging lens group is f, the aperture value (f-number) of the optical imaging lens group is Fno, half of the maximum viewing angle in the optical imaging lens group is HFOV, and its numerical value is as follows : f = 6.61 mm; Fno = 2.35; and HFOV = 23.0 degrees.

Referring to FIG. 13 , it is a schematic diagram of the parameters Dr1s and Dsr2 of the first lens 110 of the optical imaging lens group in the embodiment of FIG. 1 . As can be seen from Figure 13, the distance between the first lens object side surface 111 and the aperture 100 on the optical axis is Dr1s, and the distance between the aperture 100 and the image side surface 112 of the first lens on the optical axis is Dsr2, which satisfies the following conditions: Dr1s/Dsr2 = 2.46.

In the optical imaging lens group of the first embodiment, each two adjacent lenses in the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150 and the sixth lens 160 are on the optical axis. The sum of the upper spacing distances is ΣAT, the spacing distance between the first lens 110 and the second lens 120 on the optical axis is T12, and the spacing distance between the second lens 120 and the third lens 130 on the optical axis is T23, which satisfies the following conditions : ΣAT/(T12+T23)=5.52.

In the optical imaging lens group of the first embodiment, the distance from the aperture 100 to the imaging surface 180 on the optical axis is SL, and the distance from the first lens object side surface 111 to the imaging surface 180 on the optical axis is TL, which satisfies the following conditions : SL/TL=0.95.

In the optical imaging lens group of the first embodiment, the focal length of the optical imaging lens group is f, and the maximum image height of the optical imaging lens group is ImgH (that is, half of the diagonal length of the effective sensing area of the electronic photosensitive element 190), which satisfies The following conditions: f/ImgH=2.25.

In the optical imaging lens group of the first embodiment, the focal length of the optical imaging lens group is f, and the distance from the first lens object side surface 111 to the imaging surface 180 on the optical axis is TL, which satisfies the following conditions: TL/f=1.04 .

In the optical imaging lens group of the first embodiment, the focal length of the optical imaging lens group is f, and the curvature radius of the image-side surface 152 of the fifth lens is R10, which satisfies the following condition: R10/f=-0.61.

In the optical imaging lens group of the first embodiment, the dispersion coefficient of the first lens 110 is V1, the dispersion coefficient of the second lens 120 is V2, the dispersion coefficient of the third lens 130 is V3, and the dispersion coefficient of the fourth lens 140 is V4 , the dispersion coefficient of the fifth lens 150 is V5, and the dispersion coefficient of the sixth lens 160 is V6, wherein at least two (V2, V4, V5) of V1, V2, V3, V4, V5 and V6 are less than 27.

Then refer to Table 1 and Table 2 below.

Table 1 shows the detailed structural data of the first embodiment in FIG. 1 , where the units of the radius of curvature, thickness and focal length are mm, and surfaces 0-16 represent surfaces from the object side to the image side in sequence. Table 2 shows the aspheric surface data in the first embodiment, wherein k represents the cone coefficient in the aspheric curve equation, and A4-A14 represent the 4th-14th order aspheric coefficients of each surface. In addition, the tables of the following embodiments are the schematic diagrams and aberration curve diagrams corresponding to the respective embodiments, and the definitions of the data in the tables are the same as those in Table 1 and Table 2 of the first embodiment, and will not be repeated here.

<Second Embodiment>

Please refer to FIG. 3 and FIG. 4, wherein FIG. 3 shows a schematic diagram of an imaging device according to the second embodiment of the present invention, and FIG. 4 shows the spherical aberration, astigmatism and distortion of the second embodiment in sequence from left to right Graph. As can be seen from FIG. 3 , the image capturing device of the second embodiment includes an optical imaging lens group (not labeled separately) and an electronic photosensitive element 290 . The optical imaging lens group includes an aperture 200, a first lens 210, a second lens 220, a third lens 230, a fourth lens 240, a fifth lens 250, a sixth lens 260, and an infrared filter from the object side to the image side. The optical element 270 and the imaging surface 280, and the electronic photosensitive element 290 is arranged on the imaging surface 280 of the optical imaging lens group, wherein there are six lenses (210-260) with refractive power in the optical imaging lens group, and any two adjacent There is a distance between the lenses with refractive power, and the lenses with refractive power do not move relative to each other.

The first lens 210 has positive refractive power and is made of plastic material. The object-side surface 211 is convex near the optical axis, and the image-side surface 212 is convex near the optical axis, both of which are aspherical. In addition, the image-side surface 212 of the first lens has at least one inflection point.

The second lens 220 has negative refractive power and is made of plastic material. The object-side surface 221 is convex near the optical axis, and the image-side surface 222 is concave near the optical axis, both of which are aspherical. In addition, both the object-side surface 221 and the image-side surface 222 of the second lens have at least one inflection point.

The third lens 230 has a positive refractive power and is made of plastic material. The object-side surface 231 is convex near the optical axis, and the image-side surface 232 is convex near the optical axis, both of which are aspherical. In addition, both the object-side surface 231 and the image-side surface 232 of the third lens have at least one inflection point.

The fourth lens 240 has negative refractive power and is made of plastic material. The object-side surface 241 is convex near the optical axis, and the image-side surface 242 is concave near the optical axis, both of which are aspherical. In addition, the object-side surface 241 of the fourth lens has at least one inflection point.

The fifth lens 250 has positive refractive power and is made of plastic material. The object-side surface 251 is concave near the optical axis, and the image-side surface 252 is convex near the optical axis, both of which are aspherical. In addition, both the object-side surface 251 and the image-side surface 252 of the fifth lens have at least one inflection point.

The sixth lens 260 has negative refractive power and is made of plastic material. The object-side surface 261 is concave near the optical axis, and the image-side surface 262 is concave near the optical axis, both of which are aspherical. In addition, the image-side surface 262 of the sixth lens has at least one convex surface off-axis.

The infrared filter element 270 is made of glass, and it is disposed between the sixth lens 260 and the imaging surface 280 and does not affect the focal length of the optical camera lens group.

Please refer to Table 3 and Table 4 below.

In the second embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 3 and Table 4, the following data can be deduced:

In the optical imaging lens group of the second embodiment, the dispersion coefficient of the first lens 210 is V1, the dispersion coefficient of the second lens 220 is V2, the dispersion coefficient of the third lens 230 is V3, and the dispersion coefficient of the fourth lens 240 is V4 , the dispersion coefficient of the fifth lens 250 is V5, and the dispersion coefficient of the sixth lens 260 is V6, wherein at least two (V2, V4) of V1, V2, V3, V4, V5 and V6 are less than 27.

<Third embodiment>

Please refer to FIG. 5 and FIG. 6, wherein FIG. 5 shows a schematic diagram of an imaging device according to the third embodiment of the present invention, and FIG. 6 shows the spherical aberration, astigmatism and distortion of the third embodiment in sequence from left to right Graph. As can be seen from FIG. 5 , the image capturing device of the third embodiment includes an optical imaging lens group (not another number) and an electronic photosensitive element 390 . The optical camera lens group includes the first lens 310, aperture 300, second lens 320, third lens 330, fourth lens 340, fifth lens 350, sixth lens 360, infrared filter The optical element 370 and the imaging surface 380, and the electronic photosensitive element 390 is arranged on the imaging surface 380 of the optical imaging lens group, wherein there are six lenses (310-360) with refractive power in the optical imaging lens group, and any two adjacent There is a distance between the lenses with refractive power, and the lenses with refractive power do not move relative to each other.

The first lens 310 has positive refractive power and is made of plastic material. The object-side surface 311 is convex near the optical axis, and the image-side surface 312 is convex near the optical axis, both of which are aspherical. In addition, the image-side surface 312 of the first lens has at least one inflection point.

The second lens 320 has positive refractive power and is made of plastic material. The object-side surface 321 is convex near the optical axis, and the image-side surface 322 is convex near the optical axis, both of which are aspherical.

The third lens 330 has negative refractive power and is made of plastic material. The object-side surface 331 is concave near the optical axis, and the image-side surface 332 is concave near the optical axis, both of which are aspherical. In addition, both the object-side surface 331 and the image-side surface 332 of the third lens have at least one inflection point.

The fourth lens 340 has negative refractive power and is made of plastic material. The object-side surface 341 is concave near the optical axis, and the image-side surface 342 is concave near the optical axis, both of which are aspherical. In addition, both the object-side surface 341 and the image-side surface 342 of the fourth lens have at least one inflection point.

The fifth lens 350 has positive refractive power and is made of plastic material. The object-side surface 351 is concave near the optical axis, and the image-side surface 352 is convex near the optical axis, both of which are aspherical. In addition, both the object-side surface 351 and the image-side surface 352 of the fifth lens have at least one inflection point.

The sixth lens 360 has negative refractive power and is made of plastic material. The object-side surface 361 is convex near the optical axis, and the image-side surface 362 is concave near the optical axis, both of which are aspherical. In addition, the image-side surface 362 of the sixth lens has at least one convex surface off-axis.

The infrared filter element 370 is made of glass, which is disposed between the sixth lens 360 and the imaging surface 380 and does not affect the focal length of the optical camera lens group.

Please refer to Table 5 and Table 6 below.

In the third embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 5 and Table 6, the following data can be deduced:

<Fourth Embodiment>

Please refer to FIG. 7 and FIG. 8, wherein FIG. 7 shows a schematic diagram of an imaging device according to the fourth embodiment of the present invention, and FIG. 8 shows the spherical aberration, astigmatism and distortion of the fourth embodiment in sequence from left to right Graph. As can be seen from FIG. 7 , the image capturing device of the fourth embodiment includes an optical imaging lens group (not labeled separately) and an electronic photosensitive element 490 . The optical imaging lens group includes an aperture 400, a first lens 410, a second lens 420, a third lens 430, a fourth lens 440, a fifth lens 450, a sixth lens 460, an infrared filter The optical element 470 and the imaging surface 480, and the electronic photosensitive element 490 is arranged on the imaging surface 480 of the optical imaging lens group, wherein there are six lenses (410-460) with refractive power in the optical imaging lens group, and any two adjacent There is a distance between the lenses with refractive power, and the lenses with refractive power do not move relative to each other.

The first lens 410 has a positive refractive power and is made of plastic material. The object-side surface 411 is convex near the optical axis, and the image-side surface 412 is convex near the optical axis, both of which are aspherical. In addition, the image-side surface 412 of the first lens has at least one inflection point.

The second lens 420 has a negative refractive power and is made of plastic material. The object-side surface 421 is convex near the optical axis, and the image-side surface 422 is concave near the optical axis, both of which are aspherical. In addition, the object-side surface 421 of the second lens has at least one inflection point.

The third lens 430 has negative refractive power and is made of plastic material. The object-side surface 431 is convex near the optical axis, and the image-side surface 432 is concave near the optical axis, both of which are aspherical.

The fourth lens 440 has a positive refractive power and is made of plastic material. The object-side surface 441 is concave near the optical axis, and the image-side surface 442 is convex near the optical axis, both of which are aspherical. In addition, the image-side surface 442 of the fourth lens has at least one inflection point.

The fifth lens 450 has positive refractive power and is made of plastic material. The object-side surface 451 is concave near the optical axis, and the image-side surface 452 is convex near the optical axis, both of which are aspherical.

The sixth lens 460 has negative refractive power and is made of plastic material. The object-side surface 461 is concave near the optical axis, and the image-side surface 462 is concave near the optical axis, both of which are aspherical. In addition, the image-side surface 462 of the sixth lens has at least one convex surface off-axis.

The infrared filtering element 470 is made of glass, and it is disposed between the sixth lens 460 and the imaging surface 480 and does not affect the focal length of the optical camera lens group.

Please refer to Table 7 and Table 8 below.

In the fourth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 7 and Table 8, the following data can be deduced:

In the optical imaging lens group of the fourth embodiment, the dispersion coefficient of the first lens 410 is V1, the dispersion coefficient of the second lens 420 is V2, the dispersion coefficient of the third lens 430 is V3, and the dispersion coefficient of the fourth lens 440 is V4 , the dispersion coefficient of the fifth lens 450 is V5, and the dispersion coefficient of the sixth lens 460 is V6, wherein at least two (V2, V4) of V1, V2, V3, V4, V5 and V6 are less than 27.

<Fifth Embodiment>

Please refer to FIG. 9 and FIG. 10, wherein FIG. 9 shows a schematic diagram of an imaging device according to a fifth embodiment of the present invention, and FIG. 10 shows the spherical aberration, astigmatism and distortion of the fifth embodiment in sequence from left to right Graph. As can be seen from FIG. 9 , the imaging device of the fifth embodiment includes an optical imaging lens group (not labeled separately) and an electronic photosensitive element 590 . The optical imaging lens group includes an aperture 500, a first lens 510, a second lens 520, a third lens 530, a fourth lens 540, a fifth lens 550, a sixth lens 560, and an infrared filter from the object side to the image side. Optical element 570, flat glass (CoverGlass) 575, and imaging surface 580, and electronic photosensitive element 590 is arranged on the imaging surface 580 of the optical imaging lens group, wherein there are six lenses with refractive power in the optical imaging lens group (510-560) , and there is a distance between any two adjacent lenses with refractive power, and the lenses with refractive power do not move relative to each other.

The first lens 510 has positive refractive power and is made of plastic material. The object-side surface 511 is convex near the optical axis, and the image-side surface 512 is convex near the optical axis, both of which are aspherical. In addition, the object-side surface 511 of the first lens has at least one inflection point.

The second lens 520 has negative refractive power and is made of plastic material. The object-side surface 521 is concave near the optical axis, and the image-side surface 522 is concave near the optical axis, both of which are aspherical. In addition, the object-side surface 521 of the second lens has at least one inflection point.

The third lens 530 has negative refractive power and is made of plastic material. The object-side surface 531 is convex near the optical axis, and the image-side surface 532 is concave near the optical axis, both of which are aspherical.

The fourth lens 540 has negative refractive power and is made of plastic material. The object-side surface 541 is convex near the optical axis, and the image-side surface 542 is concave near the optical axis. Both are aspherical. In addition, the object-side surface 541 of the fourth lens has at least one inflection point.

The fifth lens 550 has a positive refractive power and is made of plastic material. The object-side surface 551 is concave near the optical axis, and the image-side surface 552 is convex near the optical axis, both of which are aspherical. In addition, both the object-side surface 551 and the image-side surface 552 of the fifth lens have at least one inflection point.

The sixth lens 560 has negative refractive power and is made of plastic material. The object-side surface 561 is convex near the optical axis, and the image-side surface 562 is concave near the optical axis, both of which are aspherical. In addition, the image-side surface 562 of the sixth lens has at least one convex surface off-axis.

Both the infrared filter element 570 and the cover glass 575 are made of glass, which are sequentially arranged between the sixth lens 560 and the imaging surface 580 and do not affect the focal length of the optical camera lens group.

Please refer to Table 9 and Table 10 below.

In the fifth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 9 and Table 10, the following data can be deduced:

In the optical imaging lens group of the fifth embodiment, the dispersion coefficient of the first lens 510 is V1, the dispersion coefficient of the second lens 520 is V2, the dispersion coefficient of the third lens 530 is V3, and the dispersion coefficient of the fourth lens 540 is V4 , the dispersion coefficient of the fifth lens 550 is V5, and the dispersion coefficient of the sixth lens 560 is V6, wherein at least two (V2, V3, V5, V6) of V1, V2, V3, V4, V5 and V6 are less than 27.

<Sixth Embodiment>

Please refer to Figure 11 and Figure 12, wherein Figure 11 shows a schematic diagram of an imaging device according to the sixth embodiment of the present invention, and Figure 12 shows the spherical aberration, astigmatism and distortion of the sixth embodiment in sequence from left to right Graph. As can be seen from FIG. 11 , the image capturing device of the sixth embodiment includes an optical imaging lens group (not another number) and an electronic photosensitive element 690 . The optical imaging lens group includes an aperture 600, a first lens 610, a second lens 620, a third lens 630, a fourth lens 640, a fifth lens 650, a sixth lens 660, and an infrared filter from the object side to the image side. The optical element 670 and the imaging surface 680, and the electronic photosensitive element 690 is arranged on the imaging surface 680 of the optical imaging lens group, wherein there are six lenses (610-660) with refractive power in the optical imaging lens group, and any two adjacent There is a distance between the lenses with refractive power, and the lenses with refractive power do not move relative to each other.

The first lens 610 has positive refractive power and is made of plastic material. The object-side surface 611 is convex near the optical axis, and the image-side surface 612 is convex near the optical axis, both of which are aspherical. In addition, the image-side surface 612 of the first lens has at least one inflection point.

The second lens 620 has negative refractive power and is made of plastic material. The object-side surface 621 is concave near the optical axis, and the image-side surface 622 is concave near the optical axis, both of which are aspherical. In addition, both the object-side surface 621 and the image-side surface 622 of the second lens have at least one inflection point.

The third lens 630 has negative refractive power and is made of plastic material. The object-side surface 631 is convex near the optical axis, and the image-side surface 632 is concave near the optical axis, both of which are aspherical. In addition, the object-side surface 631 of the third lens has at least one inflection point.

The fourth lens 640 has negative refractive power and is made of plastic material. The object-side surface 641 is convex near the optical axis, and the image-side surface 642 is concave near the optical axis, both of which are aspherical. In addition, the object-side surface 641 of the fourth lens has at least one inflection point.

The fifth lens 650 has a negative refractive power and is made of plastic material. The object-side surface 651 is concave near the optical axis, and the image-side surface 652 is convex near the optical axis, both of which are aspherical. In addition, the object-side surface 651 of the fifth lens has at least one inflection point.

The sixth lens 660 has positive refractive power and is made of plastic material. The object-side surface 661 is convex near the optical axis, and the image-side surface 662 is concave near the optical axis, both of which are aspherical. In addition, the image-side surface 662 of the sixth lens has at least one convex surface off-axis.

The infrared filter element 670 is made of glass, and it is disposed between the sixth lens 660 and the imaging surface 680 and does not affect the focal length of the optical camera lens group.

Please refer to Table 11 and Table 12 below.

In the sixth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 11 and Table 12, the following data can be calculated:

In the optical imaging lens group of the sixth embodiment, the dispersion coefficient of the first lens 610 is V1, the dispersion coefficient of the second lens 620 is V2, the dispersion coefficient of the third lens 630 is V3, and the dispersion coefficient of the fourth lens 640 is V4 , the dispersion coefficient of the fifth lens 650 is V5, and the dispersion coefficient of the sixth lens 660 is V6, wherein at least two (V2, V3, V5, V6) of V1, V2, V3, V4, V5 and V6 are less than 27.

<Seventh Embodiment>

Please refer to FIG. 14 , which is a schematic diagram illustrating an electronic device 10 according to a seventh embodiment of the present invention. The electronic device 10 of the seventh embodiment is a smart phone. The electronic device 10 includes an imaging device 11, and the imaging device 11 includes an optical camera lens group (not shown) and an electronic photosensitive element (not shown) according to the present invention. Wherein the electronic photosensitive element is arranged on the imaging surface of the optical camera lens group.

<Eighth embodiment>

Please refer to FIG. 15 , which is a schematic diagram illustrating an electronic device 20 according to an eighth embodiment of the present invention. The electronic device 20 of the eighth embodiment is a tablet computer. The electronic device 20 includes an imaging device 21, and the imaging device 21 includes an optical imaging lens group (not shown) and an electronic photosensitive element (not shown) according to the present invention. Wherein the electronic photosensitive element is arranged on the imaging surface of the optical camera lens group.

<Ninth Embodiment>

Please refer to FIG. 16 , which is a schematic diagram illustrating an electronic device 30 according to a ninth embodiment of the present invention. The electronic device 30 of the ninth embodiment is a head-mounted display (Head-mounteddisplay, HMD), and the electronic device 30 includes an imaging device 31, and the imaging device 31 includes an optical imaging lens group (not disclosed) according to the present invention and An electronic photosensitive element (not shown in the figure), wherein the electronic photosensitive element is arranged on the imaging surface of the optical imaging lens group.

Although the present invention has been disclosed above in terms of implementation, it is not intended to limit the present invention. Any skilled person can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection should be based on the scope defined by the appended claims.

Claims (23)

1. An optical imaging lens group, characterized in that it comprises sequentially from the object side to the image side: A first lens with positive refractive power, and its object-side surface near the optical axis is a convex surface; a second lens with refractive power; a third lens with refractive power; a fourth lens with refractive power; A fifth lens with refractive power, its image-side surface near the optical axis is convex, and both its object-side surface and image-side surface are aspherical; and 1. The sixth lens has refractive power, and its object-side surface and image-side surface are both aspherical; Wherein, there are six lenses with refractive power in the optical imaging lens group, and there is a distance between any two adjacent lenses with refractive power, and there is no relative movement between the lenses with refractive power. The lens group also includes an aperture, which is arranged between an object and the third lens, the focal length of the optical imaging lens group is f, the maximum image height of the optical imaging lens group is ImgH, and the image side surface of the fifth lens is The radius of curvature is R10, which satisfies the following conditions: 2.0<f/ImgH; and -1.25<R10/f<0. 2. The optical imaging lens group according to claim 1, wherein the second lens has a negative refractive power. 3 . The optical imaging lens group according to claim 2 , wherein the image-side surface of the sixth lens has at least one convex surface off-axis. 4 . 4. The optical imaging lens group according to claim 3, wherein half of the maximum viewing angle in the optical imaging lens group is HFOV, which satisfies the following conditions: 10.0 degrees < HFOV < 25.0 degrees. 5. The optical imaging lens group according to claim 3, wherein the object-side surfaces and image-side surfaces of the first lens, the second lens, the third lens, and the fourth lens are all aspherical surfaces, And the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all made of plastic material, the focal length of the optical imaging lens group is f, and the optical imaging lens group The maximum image height of is ImgH, which satisfies the following conditions: 2.15<f/ImgH<3.5. 6 . The optical imaging lens group according to claim 3 , wherein the image-side surface of the sixth lens is concave near the axis. 7 . 7. The optical imaging lens group according to claim 3, wherein two of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are each The sum of the distances between adjacent lenses on the optical axis is ΣAT, the distance between the first lens and the second lens on the optical axis is T12, and the distance between the second lens and the third lens on the optical axis is T23, which satisfies the following conditions: 5.0<ΣAT/(T12+T23). 8. The optical imaging lens group according to claim 3, wherein the distance between the object side surface of the first lens and the aperture on the optical axis is Dr1s, and the distance between the aperture and the image side surface of the first lens is Dr1s. The separation distance on the axis is Dsr2, which satisfies the following conditions: 0.60<Dr1s/Dsr2. 9 . The optical imaging lens group according to claim 1 , wherein the image-side surface of the third lens near the optical axis is concave. 10 . 10. The optical imaging lens group according to claim 9, wherein the focal length of the optical imaging lens group is f, and the distance from the object-side surface of the first lens to an imaging plane on the optical axis is TL, which satisfies The following conditions: 0.70<TL/f<1.15. 11. The optical imaging lens group according to claim 9, wherein the object-side surface and the image-side surface of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens wherein at least three surfaces have at least one inflection point. 12. The optical imaging lens group according to claim 11, wherein the distance from the diaphragm to an imaging surface on the optical axis is SL, and the distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, which satisfies the following conditions: 0.85<SL/TL<1.05. 13. The optical imaging lens group according to claim 11, wherein the focal length of the optical imaging lens group is f, and the radius of curvature of the fifth lens image side surface is R10, which satisfies the following conditions: -1.0<R10/f<-0.1. 14. The optical imaging lens group according to claim 1, wherein the fifth lens has positive refractive power. 15. The optical imaging lens group according to claim 1, wherein at least three of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens The sheet lens has negative refractive power. 16. The optical imaging lens group according to claim 1, wherein the dispersion coefficient of the first lens is V1, the dispersion coefficient of the second lens is V2, the dispersion coefficient of the third lens is V3, and the dispersion coefficient of the second lens is V3. The dispersion coefficient of the four lenses is V4, the dispersion coefficient of the fifth lens is V5, and the dispersion coefficient of the sixth lens is V6, wherein at least two of V1, V2, V3, V4, V5 and V6 are less than 27. 17. An imaging device, characterized in that it comprises: The optical imaging lens group as claimed in claim 1; and An electronic photosensitive element is arranged on an imaging surface of the optical imaging lens group. 18. An electronic device, characterized in that it comprises: The imaging device as claimed in claim 17. 19. An optical imaging lens group, characterized in that it comprises sequentially from the object side to the image side: A first lens with positive refractive power, and its object-side surface near the optical axis is a convex surface; a second lens with refractive power; a third lens with refractive power; a fourth lens with refractive power; A fifth lens with refractive power, its image-side surface near the optical axis is convex, and both its object-side surface and image-side surface are aspherical; and 1. The sixth lens has refractive power, its image-side surface near the optical axis is concave, and its object-side surface and image-side surface are both aspherical; Wherein, there are six lenses with refractive power in the optical imaging lens group, and there is a distance between any two adjacent lenses with refractive power, and there is no relative movement between the lenses with refractive power. The lens group also includes an aperture, which is arranged between an object and the third lens, the focal length of the optical imaging lens group is f, the maximum image height of the optical imaging lens group is ImgH, and the image side surface of the fifth lens is The radius of curvature is R10, which satisfies the following conditions: 2.0<f/ImgH; and R10/f<0. 20 . The optical imaging lens group according to claim 19 , wherein the sixth lens has at least one convex surface off-axis on the image-side surface. 21 . 21. The optical imaging lens group according to claim 20, wherein the object-side surfaces and image-side surfaces of the first lens, the second lens, the third lens, and the fourth lens are all aspherical surfaces, And the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all made of plastic material. 22. The optical imaging lens group according to claim 20, characterized in that, the distance between the object side surface of the first lens and the aperture on the optical axis is Dr1s, and the distance between the aperture and the image side surface of the first lens is Dr1s. The separation distance on the axis is Dsr2, which satisfies the following conditions: 0.60<Dr1s/Dsr2. 23. The optical imaging lens group according to claim 20, wherein the dispersion coefficient of the first lens is V1, the dispersion coefficient of the second lens is V2, the dispersion coefficient of the third lens is V3, and the dispersion coefficient of the second lens is V3. The dispersion coefficient of the four lenses is V4, the dispersion coefficient of the fifth lens is V5, and the dispersion coefficient of the sixth lens is V6, wherein at least two of V1, V2, V3, V4, V5 and V6 are less than 27.