CN207586517U - Optical imaging lens and camera module - Google Patents

Abstract

The utility model discloses an optical imaging lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are arranged in sequence from an object side to an image side along an optical axis; the first lens element with negative refractive power has a concave image-side surface; the second lens element with refractive power has a convex object-side surface and a convex image-side surface; the third lens element with refractive power has a concave object-side surface; the fourth lens element with refractive power; the fifth lens element with refractive power; the sixth lens element with refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region, and each of the object-side surface and the image-side surface has at least one inflection point. The optical imaging lens can meet the requirement of large-field-angle imaging, and meanwhile, the total length of the lens group can be shortened, so that the optical imaging lens is light, thin and small. The utility model discloses still disclose the module of making a video recording including above-mentioned optical imaging lens.

Description

Optical imaging lens and camera module

technical field

The utility model relates to the field of optical lenses, in particular to an optical imaging lens. The utility model also relates to a camera module.

Background technique

With the development of electronic science and technology, mobile and portable electronic devices have been rapidly popularized, such as smart phones, tablet computers, driving recorders, sports cameras, etc., and at the same time, the optical imaging lenses used in them have been flourishing.

While mobile and portable electronic devices bring great convenience to people's lives, people's requirements for mobile electronic devices are also getting higher and higher, and they are constantly pursuing more convenient and better user experience. This aspect requires the use of optical imaging The lens is thinner and smaller; on the other hand, in some applications, the optical imaging lens is required to have a larger field of view, such as front selfie, game console, panoramic camera, etc. The large field of view can make the captured scene more Wider, wider field of view. Driven by this, the market demand for optical imaging lenses that are small, light and thin while having a large field of view has increased sharply, especially in the fields of mobile phones and vehicle lenses.

Traditional light and thin wide-angle optical imaging lenses mostly use four-element and five-element lens structures, but the four-element and five-element lens structures have limitations in terms of refractive power distribution, aberration astigmatism correction, and sensitivity distribution. Imaging requirements of higher specifications cannot be further satisfied. At present, the five-piece wide-angle optical imaging lens group that is mainly developed, as the number of lenses increases, the total length of the lens also increases, which cannot effectively suppress the total length of the lens group.

Utility model content

The purpose of the utility model is to provide an optical imaging lens, which can shorten the total length of the lens group and achieve lightness and miniaturization while satisfying imaging with a large viewing angle compared with the prior art. The utility model also provides a camera module.

In order to achieve the above object, the utility model provides the following technical solutions:

An optical imaging lens, comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged sequentially along the optical axis from the object side to the image side;

The first lens has a negative refractive power, and its image-side surface is concave;

The second lens has refractive power, its object-side surface is convex, and its image-side surface is convex;

The third lens has refractive power, and its object-side surface is concave;

The fourth lens has refractive power;

The fifth lens has refractive power;

The sixth lens has refractive power, its object-side surface is convex at the near optical axis, its image-side surface is concave at the near optical axis, and its object-side surface contains at least one inflection point, and its image-side surface contains at least one inflection point;

and meet the following conditions:

Wherein, f represents the focal length of the optical imaging lens, f ₂₅ represents the combined focal length of the second lens to the fifth lens, CT ₂₅ represents the optical axis of each lens from the second lens to the fifth lens The sum of the thicknesses of , AG ₂₅ represents the sum of the air gaps on the optical axis between the adjacent lenses of the second lens to the fifth lens.

Optionally, the object-side surface of the fourth lens is convex, and the image-side surface is convex.

Optionally, the following conditions are also met: Wherein, Yin ₄ represents the minimum optical effective diameter of the fourth lens, and CT ₄ represents the thickness of the fourth lens on the optical axis.

Optionally, the following conditions are also met: Wherein, CT ₂ represents the thickness of the second lens on the optical axis, and CT ₃ represents the thickness of the third lens on the optical axis.

Optionally, the following conditions are also met: Wherein, R ₁₁ represents the radius of curvature of the object-side surface of the first lens, and R ₁₂ represents the curvature radius of the image-side surface of the first lens.

Optionally, the following condition is also satisfied: |f ₃ |>|f _i |, where i=1, 2, 4, 5, 6, f _i represents the focal length of the i-th lens, and f ₃ represents the focal length of the third lens focal length.

Optionally, the following condition is also satisfied: |f ₆ |>|f _j |, wherein j=1, 2, 4, 5, f _j represents the focal length of the jth lens, and f ₆ represents the focal length of the sixth lens.

Optionally, the following conditions are also met: Wherein, f ₅ represents the focal length of the fifth lens.

Optionally, the following conditions are also met: Wherein, ΣCT represents the sum of the thicknesses of the lenses from the first lens to the sixth lens on the optical axis, and ΣAG represents the thickness of the adjacent lenses from the first lens to the sixth lens on the optical axis. The sum of the air intervals.

Optionally, the following condition is also satisfied: 1.8<AG ₁₂ /AG ₅₆ <3, wherein, AG ₁₂ represents the air gap on the optical axis between the first lens and the second lens, and AG ₅₆ represents the An air space on the optical axis between the fifth lens and the sixth lens.

Optionally, the following condition is also satisfied: 1.2<CA ₆₁ /CA ₁₁ <1.8, wherein, CA ₆₁ represents the maximum optical effective diameter of the object-side surface of the sixth lens, and CA ₁₁ represents the maximum optical effective diameter of the object-side surface of the first lens. Maximum optical effective diameter.

Optionally, the following conditions are also met: Wherein, ET ₅ represents the edge thickness of the fifth lens, and CT ₅ represents the thickness of the fifth lens on the optical axis.

Optionally, the following conditions are also met: Wherein, R ₅₁ represents the radius of curvature of the object-side surface of the fifth lens, and R ₅₂ represents the curvature radius of the image-side surface of the fifth lens.

Optionally, the following conditions are also met: Wherein, R ₆₁ represents the radius of curvature of the object-side surface of the sixth lens, and R ₆₂ represents the radius of curvature of the image-side surface of the sixth lens.

Optionally, the following conditions are also met: Wherein, f ₂₆ represents the combined focal length from the second lens to the sixth lens.

Optionally, the following conditions are also met: Wherein, Yc ₆₁ represents the distance from the intersection point of the object-side surface of the sixth lens and the optical axis to the projected point of the stagnation point of the object-side surface of the sixth lens on the optical axis, and Yc ₆₂ represents the distance between the image-side surface of the sixth lens and The distance from the intersection point of the optical axes to the projection point of the stagnation point on the image side surface of the sixth lens on the optical axis.

A camera module, comprising an electronic photosensitive element and the above-mentioned optical imaging lens, the electronic photosensitive element is arranged on the imaging surface of the optical imaging lens.

It can be seen from the above technical solution that the optical imaging lens provided by the utility model adopts a six-piece structure, including a first lens, a second lens, a third lens, a fourth lens, and In the fifth lens and the sixth lens, the light from the object side passes through each lens in turn, and is imaged on the imaging surface on the image side of the sixth lens. In this optical imaging lens, each lens adopts a reasonable surface structure, wherein by adjusting the ratio of the combined focal length of the intermediate lens group to the focal length of the entire optical lens group, the refractive power of the optical lens group is rationally distributed; The ratio of the lens thickness of the group to the air space between the lenses makes the overall structure of the middle lens group relatively compact, which is conducive to shortening the total length of the optical lens group, thereby achieving thinning and miniaturization.

The camera module provided by the utility model can achieve the above beneficial effects.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of an optical imaging lens provided by the first embodiment of the present invention;

Fig. 2 is the distortion field curvature diagram of the optical imaging lens in the first embodiment of the present invention;

Fig. 3 is a spherical aberration curve diagram of the optical imaging lens in the first embodiment of the present invention;

Fig. 4 is a schematic diagram of an optical imaging lens provided by the second embodiment of the present invention;

Fig. 5 is a distortion field curvature diagram of the optical imaging lens in the second embodiment of the present invention;

Fig. 6 is a spherical aberration curve diagram of the optical imaging lens in the second embodiment of the present invention;

Fig. 7 is a schematic diagram of an optical imaging lens provided by the third embodiment of the present invention;

Fig. 8 is a distortion field curvature diagram of the optical imaging lens in the third embodiment of the present invention;

Fig. 9 is a spherical aberration curve diagram of the optical imaging lens in the third embodiment of the present invention;

Fig. 10 is a schematic diagram of an optical imaging lens provided by the fourth embodiment of the present invention;

Fig. 11 is a distortion field curvature diagram of the optical imaging lens in the fourth embodiment of the present invention;

Fig. 12 is a spherical aberration curve diagram of the optical imaging lens in the fourth embodiment of the present invention;

Fig. 13 is a schematic diagram of an optical imaging lens provided by the fifth embodiment of the present invention;

Fig. 14 is a distortion field curvature diagram of the optical imaging lens in the fifth embodiment of the present invention;

Fig. 15 is a spherical aberration curve diagram of the optical imaging lens in the fifth embodiment of the present invention;

Fig. 16 is a schematic diagram of an optical imaging lens provided by the sixth embodiment of the present invention;

Fig. 17 is a distortion field curvature diagram of the optical imaging lens in the sixth embodiment of the present invention;

Fig. 18 is a spherical aberration curve diagram of the optical imaging lens in the sixth embodiment of the present invention;

Fig. 19 is a schematic diagram of an optical imaging lens provided by the seventh embodiment of the present invention;

Fig. 20 is a distortion field curvature diagram of the optical imaging lens in the seventh embodiment of the present invention;

Fig. 21 is a spherical aberration curve diagram of the optical imaging lens in the seventh embodiment of the present invention;

Fig. 22 is a schematic diagram of an optical imaging lens provided by the eighth embodiment of the present invention;

Fig. 23 is a distortion field curvature diagram of the optical imaging lens in the eighth embodiment of the present invention;

FIG. 24 is a graph of spherical aberration of the optical imaging lens in the eighth embodiment of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution in the utility model, the technical solution in the utility model embodiment will be clearly and completely described below in conjunction with the accompanying drawings in the utility model embodiment. Obviously, The described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

An embodiment of the present invention provides an optical imaging lens, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially along the optical axis from the object side to the image side;

The first lens has a negative refractive power, and its image-side surface is concave;

The second lens has refractive power, its object-side surface is convex, and its image-side surface is convex;

The third lens has refractive power, and its object-side surface is concave;

The fourth lens has refractive power;

The fifth lens has refractive power;

The sixth lens has refractive power, its object-side surface is convex at the near optical axis, its image-side surface is concave at the near optical axis, and its object-side surface contains at least one inflection point, and its image-side surface contains at least one inflection point;

and meet the following conditions:

Wherein, f represents the focal length of the optical imaging lens, f ₂₅ represents the combined focal length of the second lens to the fifth lens, CT ₂₅ represents the optical axis of each lens from the second lens to the fifth lens The sum of the thicknesses of , AG ₂₅ represents the sum of the air gaps on the optical axis between the adjacent lenses of the second lens to the fifth lens.

In the optical imaging lens of this embodiment, the object-side light rays sequentially pass through the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens to be imaged on the imaging surface on the image side of the sixth lens. Among them, each lens adopts a reasonable surface structure and refractive power matching, so that the entire lens group has better light gathering ability. The first lens has a negative refractive power, so that the lens group can achieve a larger viewing angle and realize wide-angle imaging.

Further, by adjusting the ratio of the combined focal length of the intermediate lens group to the focal length of the entire optical lens group, the refractive power of the optical lens group is rationally allocated; at the same time, by adjusting the ratio of the lens thickness of the intermediate lens group to the air space between the lenses, so that The overall structure of the middle lens group is relatively compact, which is beneficial to shorten the total length of the optical lens group, so as to achieve thinning and miniaturization. Therefore, compared with the prior art, the optical imaging lens of this embodiment can shorten the total length of the lens group while satisfying imaging with a large field of view, so as to achieve lightness, thinness and miniaturization.

In one embodiment, in the optical imaging lens, the object-side surface of the fourth lens is convex, and the image-side surface is convex. In this way, after the light entering from the object side passes through the first three lenses, the light passing through the fourth lens can obtain a better converging effect and reasonably distribute the refractive power.

Further specifically, the optical imaging lens also meets the following conditions: Wherein, Yin ₄ represents the minimum optical effective diameter of the fourth lens, and CT ₄ represents the thickness of the fourth lens on the optical axis. Reasonable configuration of the surface structure of the fourth lens is beneficial to actual production and molding.

Preferably, the optical imaging lens of this embodiment also meets the following conditions: Wherein, CT ₂ represents the thickness of the second lens on the optical axis, and CT ₃ represents the thickness of the third lens on the optical axis. By optimizing the configuration of the thickness of the second lens and the third lens in the middle part of the lens group, it is helpful to shorten the total length of the optical lens group, and it is beneficial to lens forming and yield stability.

Preferably, the optical imaging lens of this embodiment also meets the following conditions: Wherein, R ₁₁ represents the radius of curvature of the object-side surface of the first lens, and R ₁₂ represents the curvature radius of the image-side surface of the first lens. By rationally and optimally configuring the curvatures of the surfaces of the first lens, it is helpful to expand the viewing angle of the optical imaging lens.

The optical imaging lens of this embodiment also satisfies the following conditions: |f ₃ |>|f _i |, where i=1, 2, 4, 5, 6, f _i represents the focal length of the i-th lens, and f ₃ represents the third The focal length of the lens. It is used to reasonably distribute the refractive power of the optical system.

The following condition is further satisfied: |f ₆ |>|f _j |, wherein j=1, 2, 4, 5, f _j represents the focal length of the jth lens, and f ₆ represents the focal length of the sixth lens. In order to further reasonably distribute the refractive power of the optical system.

Further, the optical imaging lens also meets the following conditions: Wherein, f ₅ represents the focal length of the fifth lens. The refractive power of the fifth lens is further adjusted and distributed, so that the overall refractive power of the optical lens group tends to be better.

Preferably, the optical imaging lens of this embodiment also satisfies the following condition: 1.6<∑CT/∑AG<4, where ∑CT represents the sum of the thicknesses of the lenses from the first lens to the sixth lens on the optical axis, ΣAG represents the sum of the air intervals on the optical axis between the adjacent lenses of the first lens to the sixth lens. Reasonably configuring the ratio of the lens thickness of the optical imaging lens to the air space between the lenses is conducive to shortening the total length of the lens group, and is conducive to the overall molding of the lens and the stability of the yield rate.

Specifically, the following condition is also satisfied: 1.8<AG ₁₂ /AG ₅₆ <3, wherein, AG ₁₂ represents the air gap on the optical axis between the first lens and the second lens, and AG ₅₆ represents the first lens An air space on the optical axis between the fifth lens and the sixth lens. It is used to further distribute the air space between the lenses.

The optical imaging lens of this embodiment also satisfies the following conditions: 1.2<CA ₆₁ /CA ₁₁ <1.8, wherein CA ₆₁ represents the maximum optical effective diameter of the object-side surface of the sixth lens, and CA ₁₁ represents the object-side surface of the first lens The maximum optical effective diameter of the surface. By reasonably controlling the ratio of the maximum optical effective diameter of the first lens to the last lens, it is beneficial to increase the image height of the optical imaging lens.

Preferably, the optical imaging lens of this embodiment also meets the following conditions: Wherein, ET ₅ represents the edge thickness of the fifth lens, and CT ₅ represents the thickness of the fifth lens on the optical axis.

Preferably, the optical imaging lens of this embodiment also satisfies the following condition: -10<(R ₅₁ +R ₅₂ )/(R ₅₁ -R ₅₂ )<20, wherein R ₅₁ represents the curvature of the object-side surface of the fifth lens Radius, R ₅₂ represents the curvature radius of the image-side surface of the fifth lens. By rationally and optimally configuring the curvatures of the surfaces of the fifth lens, the astigmatism, curvature of field, chromatic aberration or spherical aberration of the optical lens group can be further corrected.

Preferably, the optical imaging lens of this embodiment also satisfies the following condition: 0<(R ₆₁ +R ₆₂ )/(R ₆₁ -R ₆₂ )<40, wherein R ₆₁ represents the radius of curvature of the object-side surface of the sixth lens , R ₆₂ represents the curvature radius of the image-side surface of the sixth lens. The astigmatism, curvature of field, chromatic aberration or spherical aberration of the optical lens group can be further corrected by rationally and optimally configuring the curvature of each surface of the sixth lens.

The optical imaging lens of this embodiment also satisfies the following conditions: Wherein, f ₂₆ represents the combined focal length from the second lens to the sixth lens. To further reasonably distribute the refractive power of each lens.

Preferably, the optical imaging lens of this embodiment also satisfies the following conditions: 0.4<Yc ₆₁ +Yc ₆₂ <0.8, wherein Yc ₆₁ represents the intersection point of the object-side surface of the sixth lens and the optical axis to the object side of the sixth lens The distance of the projected point of the surface stagnation point on the optical axis, Yc ₆₂ represents the distance from the intersection point of the sixth lens image side surface and the optical axis to the projected point of the sixth lens image side surface stagnation point on the optical axis. Through the optimized configuration of the surface structure of the sixth lens, the principal point of the optical imaging lens can be kept away from the imaging surface, which is conducive to shortening the total length of the lens group, achieving lightness and miniaturization, and can effectively correct the aberration of the off-axis field of view .

The optical imaging lens of the present invention will be described in detail below with specific embodiments.

first embodiment

Please refer to FIG. 1 , which is a schematic diagram of the optical imaging lens provided by the first embodiment of the present invention. As can be seen from the figure, the optical imaging lens includes a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15 and a sixth lens arranged in sequence along the optical axis from the object side to the image side 16;

The first lens 11 has a negative refractive power, and its image-side surface is concave;

The second lens 12 has a refractive power, its object side surface is convex, and its image side surface is convex;

The third lens 13 has a refractive power, and its object-side surface is concave;

The fourth lens 14 has a refractive power;

The fifth lens 15 has a refractive power;

The sixth lens 16 has refractive power, its object side surface is convex at the near optical axis, its image side surface is concave at the near optical axis, and its object side surface contains at least one inflection point, its image side surface Contains at least one inflection point.

The values of each conditional expression in this embodiment are as follows:

The optical imaging lens of this embodiment is provided with an aperture 10 between the first lens 11 and the second lens 12, and an infrared filter 17 is provided between the sixth lens 16 and the imaging surface, and the infrared filter 17 is used to filter out incoming The infrared light in the optical lens prevents the infrared light from shining on the photosensitive chip to generate noise. The optional filter material is glass and does not affect the focal length.

The structural parameters of each lens of the optical imaging lens of this embodiment are specifically shown in Table 1-1, the focal length f=1.486 mm, the aperture value Fno=2.54, and the half field angle HFOV=62.7 degrees. The units of curvature radius, thickness and focal length in the table are mm, and surfaces 0-16 represent the surfaces from the object side to the image side in turn, and surfaces 1-13 represent the object-side surface of the first lens, the image-side surface of the first lens, Aperture, object-side surface of second lens, image-side surface of second lens, object-side surface of third lens, image-side surface of third lens, object-side surface of fourth lens, image-side surface of fourth lens, object-side surface of fifth lens , the image-side surface of the fifth lens, the object-side surface of the sixth lens, and the image-side surface of the sixth lens.

Table 1-1

Each lens in this optical imaging lens adopts an aspheric design, and the curve equation of the aspheric surface is expressed as follows:

Among them, z represents the point on the aspheric surface whose distance from the optical axis is r, and its relative distance to the tangent plane of the vertex on the optical axis tangent to the aspheric surface, c represents the radius of curvature, r represents the distance between the point on the aspheric surface and the optical axis, k Indicates the cone coefficient, and Ai represents the i-th order aspheric coefficient.

The aspheric coefficients of each lens in this embodiment are specifically shown in Table 1-2, and A4-A16 represent the 4th-16th order aspheric coefficients of the lens surface, respectively.

Table 1-2

The distortion field curve and the spherical aberration curve of the optical lens design in this embodiment are shown in Figure 2 and Figure 3 respectively, wherein the test wavelength of the distortion field curve is 0.555 μm, and the test wavelength of the spherical aberration curve is 0.470 μm, 0.510 μm, 0.555 μm, 0.610 μm and 0.650 μm. The design wavelengths in the test graphs in the following embodiments are the same as those in this embodiment.

second embodiment

Please refer to FIG. 4 , which is a schematic diagram of the optical imaging lens provided by the second embodiment of the present invention. As can be seen from the figure, the optical imaging lens includes a first lens 21, a second lens 22, a third lens 23, a fourth lens 24, a fifth lens 25 and a sixth lens arranged in sequence along the optical axis from the object side to the image side 26;

The first lens 21 has a negative refractive power, and its image-side surface is concave;

The second lens 22 has a refractive power, its object side surface is convex, and its image side surface is convex;

The third lens 23 has a refractive power, and its object-side surface is concave;

The fourth lens 24 has a refractive power;

The fifth lens 25 has a refractive power;

The sixth lens 26 has a refractive power, its object side surface is convex at the near optical axis, its image side surface is concave at the near optical axis, and its object side surface contains at least one inflection point, its image side surface Contains at least one inflection point.

The values of each conditional expression in this embodiment are as follows:

The optical imaging lens of this embodiment is provided with a diaphragm 20 between the first lens 21 and the second lens 22, and an infrared filter 27 is provided between the sixth lens 26 and the imaging surface, and the infrared filter 27 filters out incoming The infrared light in the optical lens prevents the infrared light from shining on the photosensitive chip to generate noise. The optional filter material is glass and does not affect the focal length.

The structural parameters of each lens of the optical imaging lens of this embodiment are specifically shown in Table 2-1, the focal length f=1.779 mm, the aperture value Fno=2.52, and the half field angle HFOV=62.7 degrees. The unit of the radius of curvature, thickness and focal length in the table is mm, and the surfaces 0-16 represent the surfaces from the object side to the image side in turn.

table 2-1

The aspheric coefficients of each lens in this embodiment are specifically shown in Table 2-2, and A4-A16 represent the 4th-16th order aspheric coefficients of the lens surface, respectively.

Table 2-2

The distortion field curves and spherical aberration curves of the optical lens design in this embodiment are shown in Figure 5 and Figure 6 respectively, wherein the test wavelength of the distortion field curve is 0.555 μm, and the test wavelength of the spherical aberration curve is 0.470 μm, 0.510 μm, 0.555 μm, 0.610 μm and 0.650 μm.

third embodiment

Please refer to FIG. 7 , which is a schematic diagram of the optical imaging lens provided by the third embodiment of the present invention. As can be seen from the figure, the optical imaging lens includes a first lens 31, a second lens 32, a third lens 33, a fourth lens 34, a fifth lens 35 and a sixth lens arranged in sequence along the optical axis from the object side to the image side 36;

The first lens 31 has a negative refractive power, and its image-side surface is concave;

The second lens 32 has a refractive power, its object side surface is convex, and its image side surface is convex;

The third lens 33 has a refractive power, and its object-side surface is concave;

The fourth lens 34 has a refractive power;

The fifth lens 35 has a refractive power;

The sixth lens 36 has a refractive power, its object side surface is convex at the near optical axis, its image side surface is concave at the near optical axis, and its object side surface contains at least one inflection point, its image side surface Contains at least one inflection point.

The values of each conditional expression in this embodiment are as follows:

The optical imaging lens of this embodiment is provided with an aperture 30 between the first lens 31 and the second lens 32, and an infrared filter 37 is provided between the sixth lens 36 and the imaging surface, and the infrared filter 37 is used to filter out incoming The infrared light in the optical lens prevents the infrared light from shining on the photosensitive chip to generate noise. The optional filter material is glass and does not affect the focal length.

The structural parameters of each lens of the optical imaging lens of this embodiment are specifically shown in Table 3-1, the focal length f=1.832 mm, the aperture value Fno=2.51, and the half field angle HFOV=62.7 degrees. The unit of the radius of curvature, thickness and focal length in the table is mm, and the surfaces 0-16 represent the surfaces from the object side to the image side in turn.

Table 3-1

The aspheric coefficients of each lens in this embodiment are specifically shown in Table 3-2, and A4-A16 represent the 4th-16th order aspheric coefficients of the lens surface, respectively.

Table 3-2

The distortion field curves and spherical aberration curves of the optical lens design in this embodiment are shown in Figure 8 and Figure 9 respectively, wherein the test wavelength of the distortion field curve is 0.555 μm, and the test wavelength of the spherical aberration curve is 0.470 μm, 0.510 μm, 0.555 μm, 0.610 μm and 0.650 μm.

Fourth embodiment

Please refer to FIG. 10 , which is a schematic diagram of an optical imaging lens provided by a fourth embodiment of the present invention. As can be seen from the figure, the optical imaging lens includes a first lens 41, a second lens 42, a third lens 43, a fourth lens 44, a fifth lens 45 and a sixth lens arranged in sequence along the optical axis from the object side to the image side 46;

The first lens 41 has a negative refractive power, and its image-side surface is concave;

The second lens 42 has a refractive power, its object-side surface is convex, and its image-side surface is convex;

The third lens 43 has a refractive power, and its object-side surface is concave;

The fourth lens 44 has a refractive power;

The fifth lens 45 has a refractive power;

The sixth lens 46 has a refractive power, its object side surface is convex at the near optical axis, its image side surface is concave at the near optical axis, and its object side surface contains at least one inflection point, its image side surface Contains at least one inflection point.

The values of each conditional expression in this embodiment are as follows:

The optical imaging lens of this embodiment is provided with an aperture 40 between the first lens 41 and the second lens 42, and an infrared filter 47 is provided between the sixth lens 46 and the imaging surface, and the infrared filter 47 filters out incoming The infrared light in the optical lens prevents the infrared light from shining on the photosensitive chip to generate noise. The optional filter material is glass and does not affect the focal length.

The structural parameters of each lens of the optical imaging lens of this embodiment are specifically shown in Table 4-1, the focal length f=1.582 mm, the aperture value Fno=2.54, and the half field of view HFOV=62.7 degrees. The unit of the radius of curvature, thickness and focal length in the table is mm, and the surfaces 0-16 represent the surfaces from the object side to the image side in turn.

Table 4-1

The aspheric coefficients of each lens in this embodiment are specifically shown in Table 4-2, and A4-A16 represent the 4th-16th order aspheric coefficients of the lens surface, respectively.

Table 4-2

The distortion field curve and the spherical aberration curve of the optical lens design in this embodiment are shown in Figure 11 and Figure 12 respectively, wherein the test wavelength of the distortion field curve is 0.555 μm, and the test wavelength of the spherical aberration curve is 0.470 μm, 0.510 μm, 0.555 μm, 0.610 μm and 0.650 μm.

fifth embodiment

Please refer to FIG. 13 , which is a schematic diagram of an optical imaging lens provided by a fifth embodiment of the present invention. As can be seen from the figure, the optical imaging lens includes a first lens 51, a second lens 52, a third lens 53, a fourth lens 54, a fifth lens 55 and a sixth lens arranged in sequence along the optical axis from the object side to the image side 56;

The first lens 51 has a negative refractive power, and its image-side surface is concave;

The second lens 52 has a refractive power, its object-side surface is convex, and its image-side surface is convex;

The third lens 53 has a refractive power, and its object-side surface is concave;

The fourth lens 54 has a refractive power;

The fifth lens 55 has a refractive power;

The sixth lens 56 has a refractive power, its object side surface is convex at the near optical axis, its image side surface is concave at the near optical axis, and its object side surface contains at least one inflection point, and its image side surface Contains at least one inflection point.

The values of each conditional expression in this embodiment are as follows:

The optical imaging lens of this embodiment is provided with an aperture 50 between the first lens 51 and the second lens 52, and an infrared filter 57 is provided between the sixth lens 56 and the imaging surface, and the infrared filter 57 filters out incoming The infrared light in the optical lens prevents the infrared light from shining on the photosensitive chip to generate noise. The optional filter material is glass and does not affect the focal length.

The structural parameters of each lens of the optical imaging lens of this embodiment are specifically shown in Table 5-1, the focal length f=1.406 mm, the aperture value Fno=2.527, and the half field of view HFOV=62.7 degrees. The unit of the radius of curvature, thickness and focal length in the table is mm, and the surfaces 0-16 represent the surfaces from the object side to the image side in turn.

Table 5-1

The aspheric coefficients of each lens in this embodiment are specifically shown in Table 5-2, and A4-A16 represent the 4th-16th order aspheric coefficients of the lens surface, respectively.

Table 5-2

The distortion field curve and the spherical aberration curve of the optical lens design in this embodiment are shown in Figure 14 and Figure 15 respectively, wherein the test wavelength of the distortion field curve is 0.555 μm, and the test wavelength of the spherical aberration curve is 0.470 μm, 0.510 μm, 0.555 μm, 0.610 μm and 0.650 μm.

Sixth embodiment

Please refer to FIG. 16 , which is a schematic diagram of an optical imaging lens provided by a sixth embodiment of the present invention. As can be seen from the figure, the optical imaging lens includes a first lens 61, a second lens 62, a third lens 63, a fourth lens 64, a fifth lens 65 and a sixth lens arranged sequentially along the optical axis from the object side to the image side 66;

The first lens 61 has a negative refractive power, and its image-side surface is concave;

The second lens 62 has a refractive power, its object-side surface is convex, and its image-side surface is convex;

The third lens 63 has a refractive power, and its object-side surface is concave;

The fourth lens 64 has a refractive power;

The fifth lens 65 has a refractive power;

The sixth lens 66 has a refractive power, its object side surface is convex at the near optical axis, its image side surface is concave at the near optical axis, and its object side surface contains at least one inflection point, its image side surface Contains at least one inflection point.

The values of each conditional expression in this embodiment are as follows:

The optical imaging lens of this embodiment is provided with an aperture 60 between the first lens 61 and the second lens 62, and an infrared filter 67 is provided between the sixth lens 66 and the imaging surface, and the infrared filter 67 filters out incoming The infrared light in the optical lens prevents the infrared light from shining on the photosensitive chip to generate noise. The optional filter material is glass and does not affect the focal length.

The structural parameters of each lens of the optical imaging lens of this embodiment are specifically shown in Table 6-1, the focal length f=1.793 mm, the aperture value Fno=2.43, and the half field of view HFOV=62.7 degrees. The unit of the radius of curvature, thickness and focal length in the table is mm, and the surfaces 0-16 represent the surfaces from the object side to the image side in turn.

Table 6-1

The aspheric coefficients of each lens in this embodiment are specifically shown in Table 6-2, and A4-A16 represent the 4th-16th order aspheric coefficients of the lens surface, respectively.

Table 6-2

The distortion field curve and the spherical aberration curve of the optical lens design in this embodiment are shown in Figure 17 and Figure 18 respectively, wherein the test wavelength of the distortion field curve is 0.555 μm, and the test wavelength of the spherical aberration curve is 0.470 μm, 0.510 μm, 0.555 μm, 0.610 μm and 0.650 μm.

Seventh embodiment

Please refer to FIG. 19 , which is a schematic diagram of an optical imaging lens provided by a seventh embodiment of the present invention. As can be seen from the figure, the optical imaging lens includes a first lens 71, a second lens 72, a third lens 73, a fourth lens 74, a fifth lens 75 and a sixth lens arranged in sequence along the optical axis from the object side to the image side 76;

The first lens 71 has a negative refractive power, and its image-side surface is concave;

The second lens 72 has a refractive power, its object-side surface is convex, and its image-side surface is convex;

The third lens 73 has a refractive power, and its object-side surface is concave;

The fourth lens 74 has a refractive power;

The fifth lens 75 has a refractive power;

The sixth lens 76 has a refractive power, its object side surface is convex at the near optical axis, its image side surface is concave at the near optical axis, and its object side surface contains at least one inflection point, its image side surface Contains at least one inflection point.

The values of each conditional expression in this embodiment are as follows:

The optical imaging lens of this embodiment is provided with an aperture 70 between the first lens 71 and the second lens 72, and an infrared filter 77 is provided between the sixth lens 76 and the imaging surface, and the infrared filter 77 filters out incoming The infrared light in the optical lens prevents the infrared light from shining on the photosensitive chip to generate noise. The optional filter material is glass and does not affect the focal length.

The structural parameters of each lens of the optical imaging lens of this embodiment are specifically shown in Table 7-1, the focal length f=1.147 mm, the aperture value Fno=2.58, and the half field of view HFOV=64.5 degrees. The unit of the radius of curvature, thickness and focal length in the table is mm, and the surfaces 0-16 represent the surfaces from the object side to the image side in turn.

Table 7-1

The aspheric coefficients of each lens in this embodiment are specifically shown in Table 7-2, and A4-A16 represent the 4th-16th order aspheric coefficients of the lens surface, respectively.

Table 7-2

The distortion field curve and the spherical aberration curve of the optical lens design in this embodiment are shown in Figure 20 and Figure 21 respectively, wherein the test wavelength of the distortion field curve is 0.555 μm, and the test wavelength of the spherical aberration curve is 0.470 μm, 0.510 μm, 0.555 μm, 0.610 μm and 0.650 μm.

Eighth embodiment

Please refer to FIG. 22 , which is a schematic diagram of an optical imaging lens provided by an eighth embodiment of the present invention. As can be seen from the figure, the optical imaging lens includes a first lens 81, a second lens 82, a third lens 83, a fourth lens 84, a fifth lens 85 and a sixth lens arranged in sequence along the optical axis from the object side to the image side 86;

The first lens 81 has a negative refractive power, and its image-side surface is concave;

The second lens 82 has a refractive power, its object-side surface is convex, and its image-side surface is convex;

The third lens 83 has a refractive power, and its object-side surface is concave;

The fourth lens 84 has a refractive power;

The fifth lens 85 has a refractive power;

The sixth lens 86 has a refractive power, its object side surface is convex at the near optical axis, its image side surface is concave at the near optical axis, and its object side surface contains at least one inflection point, its image side surface Contains at least one inflection point.

The values of each conditional expression in this embodiment are as follows:

The optical imaging lens of this embodiment is provided with an aperture 80 between the first lens 81 and the second lens 82, and an infrared filter 87 is provided between the sixth lens 86 and the imaging surface, and the infrared filter 87 filters out incoming The infrared light in the optical lens prevents the infrared light from shining on the photosensitive chip to generate noise. The optional filter material is glass and does not affect the focal length.

The structural parameters of each lens of the optical imaging lens of this embodiment are specifically shown in Table 8-1, the focal length f=1.828 mm, the aperture value Fno=2.52, and the half field of view HFOV=62.7 degrees. The unit of the radius of curvature, thickness and focal length in the table is mm, and the surfaces 0-16 represent the surfaces from the object side to the image side in turn.

Table 8-1

The aspheric coefficients of each lens in this embodiment are specifically shown in Table 8-2, and A4-A16 represent the 4th-16th order aspheric coefficients of the lens surface, respectively.

Table 8-2

The distortion field curve and the spherical aberration curve of the optical lens design in this embodiment are shown in Figure 23 and Figure 24 respectively, wherein the test wavelength of the distortion field curve is 0.555 μm, and the test wavelength of the spherical aberration curve is 0.470 μm, 0.510 μm, 0.555 μm, 0.610 μm and 0.650 μm.

In the optical imaging lens provided by each embodiment of the utility model, each lens adopts a reasonable surface structure and refractive power matching, so that the entire lens group has better light convergence ability, and can meet the requirements of high pixels and have a large field of view at the same time characteristics, effectively reducing the total length of the lens group to achieve thinning.

The optical imaging lens has the advantages of large aperture, which ensures sufficient light input, can effectively improve the sensitivity and ensure better image quality.

In addition, the structure of six aspheric lenses is adopted, and the appropriate surface type is adopted to expand to higher-order aspheric coefficients, effectively correcting various aberrations such as field curvature, astigmatism, and chromatic aberration of magnification, and has a better thickness ratio. , better sensitivity, improve process yield and reduce production cost.

The use of plastic materials and the characteristics of precision molding of plastic materials can realize mass production, which can greatly reduce the processing cost of optical components, thereby greatly reducing the cost of optical systems, and facilitating large-scale promotion.

Correspondingly, an embodiment of the present invention also provides a camera module, including an electronic photosensitive element and the above-mentioned optical imaging lens, and the electronic photosensitive element is arranged on an imaging surface of the optical imaging lens. The camera module adopts the above-mentioned optical imaging lens, which can shorten the total length of the lens group while satisfying imaging with a large field of view, so as to achieve thinning and miniaturization.

The optical imaging lens and camera module provided by the present invention have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present utility model, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, and these improvements and modifications also fall into the protection of the claims of the utility model. within range.

Claims (17)

1. An optical imaging lens, characterized in that it comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence along the optical axis from the object side to the image side; The first lens has a negative refractive power, and its image-side surface is concave; The second lens has refractive power, its object-side surface is convex, and its image-side surface is convex; The third lens has refractive power, and its object-side surface is concave; The fourth lens has refractive power; The fifth lens has refractive power; The sixth lens has refractive power, its object-side surface is convex at the near optical axis, its image-side surface is concave at the near optical axis, and its object-side surface contains at least one inflection point, and its image-side surface contains at least one inflection point; and meet the following conditions: Wherein, f represents the focal length of the optical imaging lens, f ₂₅ represents the combined focal length of the second lens to the fifth lens, CT ₂₅ represents the optical axis of each lens from the second lens to the fifth lens The sum of the thicknesses of , AG ₂₅ represents the sum of the air gaps on the optical axis between the adjacent lenses of the second lens to the fifth lens. 2 . The optical imaging lens according to claim 1 , wherein the object-side surface of the fourth lens is convex, and the image-side surface is convex. 3 . 3. The optical imaging lens according to claim 2, wherein the following conditions are also met: Wherein, Yin ₄ represents the minimum optical effective diameter of the fourth lens, and CT ₄ represents the thickness of the fourth lens on the optical axis. 4. The optical imaging lens according to claim 1, further satisfying the following conditions: Wherein, CT ₂ represents the thickness of the second lens on the optical axis, and CT ₃ represents the thickness of the third lens on the optical axis. 5. The optical imaging lens according to claim 1, further satisfying the following conditions: Wherein, R ₁₁ represents the radius of curvature of the object-side surface of the first lens, and R ₁₂ represents the curvature radius of the image-side surface of the first lens. 6. The optical imaging lens according to claim 1, further satisfying the following conditions: |f ₃ |>|f _i |, wherein i=1, 2, 4, 5, 6, and f _i represents the i-th The focal length of the lens, f ₃ represents the focal length of the third lens. 7. The optical imaging lens according to claim 6, wherein the following conditions are also satisfied: |f ₆ |>|f _j |, wherein j=1, 2, 4, 5, and f _j represents the jth lens Focal length, f ₆ represents the focal length of the sixth lens. 8. The optical imaging lens according to claim 6, further satisfying the following conditions: Wherein, f ₅ represents the focal length of the fifth lens. 9. The optical imaging lens according to claim 1, further satisfying the following conditions: Wherein, ΣCT represents the sum of the thicknesses of the lenses from the first lens to the sixth lens on the optical axis, and ΣAG represents the thickness of the adjacent lenses from the first lens to the sixth lens on the optical axis. The sum of the air intervals. 10. The optical imaging lens according to claim 9, further satisfying the following conditions: Wherein, AG ₁₂ represents the air gap on the optical axis between the first lens and the second lens, and AG ₅₆ represents the air gap on the optical axis between the fifth lens and the sixth lens. 11. The optical imaging lens according to claim 1, further satisfying the following conditions: Wherein, CA ₆₁ represents the maximum optical effective diameter of the object-side surface of the sixth lens, and CA ₁₁ represents the maximum optical effective diameter of the object-side surface of the first lens. 12. The optical imaging lens according to claim 1, further satisfying the following conditions: Wherein, ET ₅ represents the edge thickness of the fifth lens, and CT ₅ represents the thickness of the fifth lens on the optical axis. 13. The optical imaging lens according to claim 1, further satisfying the following condition: -10<(R ₅₁ +R ₅₂ )/(R ₅₁ -R ₅₂ )<20, wherein R ₅₁ represents the The radius of curvature of the object-side surface of the fifth lens, R _{52 ,} represents the curvature radius of the image-side surface of the fifth lens. 14. The optical imaging lens according to claim 1, further satisfying the following condition: 0<(R ₆₁ +R ₆₂ )/(R ₆₁ −R ₆₂ )<40, wherein R ₆₁ represents the first The curvature radius of the object-side surface of the six lenses, R ₆₂ represents the curvature radius of the image-side surface of the sixth lens. 15. The optical imaging lens according to claim 1, further satisfying the following conditions: Wherein, f ₂₆ represents the combined focal length from the second lens to the sixth lens. 16. The optical imaging lens according to claim 1, further satisfying the following condition: 0.4<Yc ₆₁ +Yc ₆₂ <0.8, wherein Yc ₆₁ represents the intersection point between the object-side surface of the sixth lens and the optical axis The distance to the projected point of the sixth lens object side surface stagnation point on the optical axis, Yc ₆₂ represents the intersection point of the sixth lens image side surface and the optical axis to the sixth lens image side surface stagnation point on the optical axis The distance to the projected point. 17. A camera module, characterized by comprising an electronic photosensitive element and the optical imaging lens according to any one of claims 1-16, the electronic photosensitive element being arranged on an imaging surface of the optical imaging lens.