CN116880045A

CN116880045A - Optical imaging lens

Info

Publication number: CN116880045A
Application number: CN202310899845.8A
Authority: CN
Inventors: 王健; 王军; 萧国淳
Original assignee: Dongguan Asahi Optical Co ltd
Current assignee: Dongguan Asahi Optical Co ltd
Priority date: 2023-07-21
Filing date: 2023-07-21
Publication date: 2023-10-13

Abstract

The application discloses an optical imaging lens which comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens.

Description

Optical imaging lens

Technical Field

The present application relates to the technical field of optical imaging devices, and more particularly, to an optical imaging lens.

Background

With the rapid development of the age, the requirements of people for image information display are also improved. VR products now attract attention in their unique image visualization modes, in addition to mobile phones, tablets, and other electronic devices.

In order to meet the requirement of the VR product on the ultra-large visual angle, the requirement on the field angle of the optical imaging lens is also increased, while the wide-angle lens has the characteristics of short focal length and large field angle, and can shoot scenes with larger area in a shorter shooting distance range, but the current wide-angle optical imaging lens cannot better meet the use requirement of people.

Therefore, in view of the above technical problems, it is necessary to provide an optical imaging lens.

Disclosure of Invention

The present application is directed to an optical imaging lens that solves the above-mentioned problems.

In order to achieve the above object, an embodiment of the present application provides the following technical solution:

the optical imaging lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens, wherein the first lens has negative focal power, and the object side surface of the first lens is provided with a concave surface; the second lens has positive optical power; the third lens has positive focal power, and the object side surface of the third lens is arranged to be a convex surface; the fourth lens has optical power; the fifth lens has optical power; the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging system satisfy: f/EPD <2.6; the effective focal length f1 of the first lens and the effective focal length f of the optical imaging lens satisfy: -3.5< f1/f < -1.

As a further improvement of the present application, the on-axis distance TTL from the object side surface of the first lens element to the image side surface of the fifth lens element and half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy: TTL/ImgH is less than 2.5 and less than 7.0.

As a further improvement of the present application, half of the maximum field angle Semi-FOV of the optical imaging lens satisfies: the 80 DEG is less than or equal to 2X semi-FOV is less than or equal to 180 deg.

As a further improvement of the present application, the radius of curvature R9 of the object-side surface of the fifth lens and the radius of curvature R10 of the image-side surface of the fifth lens satisfy: -2.0 < (R9-R10)/(R9+R10) < 12.0.

As a further improvement of the present application, the sum Σat of the air intervals on the optical axis between the first lens to any adjacent two lenses having optical power closest to IR satisfies: Σat <3.5mm.

As a further improvement of the present application, the radius of curvature R2 of the image side surface of the first lens and the radius of curvature R3 of the object side surface of the second lens satisfy: -0.5 < R2/R3 < 1.0, the radius of curvature R3 of the second lens object-side surface and the radius of curvature R4 of the second lens image-side surface satisfying: -2.0 < R4/R3 < 1.5.

As a further improvement of the present application, the radius of curvature R8 of the image side surface of the fourth lens and the center thickness CT4 of the fourth lens on the optical axis satisfy: -2.0 < R8/CT 4< 3.5, the central thickness CT3 of the third lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis satisfying: CT3/CT4 is more than 0.5 and less than 4.5.

As a further improvement of the present application, the effective focal length f1 of the first lens and the radius of curvature R1 of the first lens object-side surface satisfy: -1< f1/R1<1.

As a further improvement of the present application, the effective focal length f2 of the second lens and the radius of curvature R4 of the image side surface of the second lens satisfy: -4.0< f2/R4<8.0.

As a further improvement of the present application, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy: -3.5< (f3+f4)/f5 < 0.

Compared with the prior art, the application has the advantages that:

the optical imaging system can have good imaging quality by limiting the surface type of the first lens, the second lens, the third lens, the fourth lens and the fifth lens and the focal power thereof; the light quantity of the lens can be effectively increased by controlling the range of the effective focal length of the optical imaging lens and the ratio of the entrance pupil diameter of the optical imaging lens, and the imaging quality of the lens in a dark environment is improved; by controlling the contribution of the focal power of the first lens in the focal length of the whole optical imaging lens, the deflection angle of light rays can be reduced, and the imaging quality of the optical imaging lens is improved.

Drawings

Fig. 1 is a schematic structural diagram of an optical imaging lens according to embodiment 1 of the present application;

FIG. 2 is a schematic diagram of an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1 of the present application;

FIG. 3 is a schematic view of an astigmatism curve of an optical imaging lens according to embodiment 1 of the present application;

fig. 4 is a schematic diagram of a distortion curve of an optical imaging lens according to embodiment 1 of the present application;

fig. 5 is a schematic view of MTF curves of the optical imaging lens of embodiment 1 of the present application;

FIG. 6 is a schematic view of the surface type, radius of curvature, thickness, half-caliber and materials of each lens of the optical imaging lens of embodiment 1 of the present application;

FIG. 7 is a schematic diagram showing aspherical coefficients of each lens surface of the optical imaging lens of embodiment 1 of the present application;

fig. 8 is a schematic structural diagram of an optical imaging lens according to embodiment 2 of the present application;

FIG. 9 is a schematic diagram of an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2 of the present application;

FIG. 10 is a schematic view of an astigmatism curve of an optical imaging lens according to embodiment 2 of the present application;

fig. 11 is a schematic diagram of a distortion curve of an optical imaging lens according to embodiment 2 of the present application;

fig. 12 is a schematic view of MTF curves of an optical imaging lens according to embodiment 2 of the present application;

FIG. 13 is a schematic view of the surface type, radius of curvature, thickness, half-caliber and materials of each lens of the optical imaging lens of embodiment 2 of the present application;

fig. 14 is a schematic diagram showing aspherical coefficients of each lens surface of the optical imaging lens of embodiment 2 of the present application;

fig. 15 is a schematic structural diagram of an optical imaging lens according to embodiment 3 of the present application;

FIG. 16 is a schematic diagram showing an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3 of the present application;

FIG. 17 is a schematic view of astigmatism curves of an optical imaging lens according to embodiment 3 of the present application;

fig. 18 is a schematic diagram of a distortion curve of an optical imaging lens according to embodiment 3 of the present application;

FIG. 19 is a schematic view of the MTF curve of the optical imaging lens of embodiment 3 of the present application;

FIG. 20 is a schematic view showing the surface type, radius of curvature, thickness, half-caliber and materials of each lens of the optical imaging lens of embodiment 3 of the present application;

fig. 21 is a schematic diagram showing aspherical coefficients of each lens surface of the optical imaging lens of embodiment 3 of the present application;

fig. 22 is a schematic structural view of an optical imaging lens according to embodiment 4 of the present application;

FIG. 23 is a schematic diagram showing an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4 of the present application;

FIG. 24 is a schematic view showing an astigmatism curve of an optical imaging lens according to embodiment 4 of the present application;

fig. 25 is a schematic diagram showing a distortion curve of an optical imaging lens according to embodiment 4 of the present application;

fig. 26 is a schematic view of MTF curves of an optical imaging lens according to embodiment 4 of the present application;

FIG. 27 is a schematic view showing the surface type, radius of curvature, thickness, half-caliber and materials of each lens of the optical imaging lens of embodiment 4 of the present application;

fig. 28 is a schematic diagram showing aspherical coefficients of each lens surface of the optical imaging lens of embodiment 4 of the present application;

fig. 29 is a schematic view showing the structure of an optical imaging lens according to embodiment 5 of the present application;

FIG. 30 is a schematic diagram showing an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5 of the present application;

FIG. 31 is a schematic view showing the astigmatism curves of an optical imaging lens according to embodiment 5 of the present application;

fig. 32 is a schematic diagram showing a distortion curve of an optical imaging lens according to embodiment 5 of the present application;

FIG. 33 is a schematic view of the MTF curve of the optical imaging lens of embodiment 5 of the present application;

FIG. 34 is a schematic view showing the surface type, radius of curvature, thickness, half-caliber and materials of each lens of the optical imaging lens of embodiment 5 of the present application;

fig. 35 is a schematic diagram showing aspherical coefficients of each lens surface of the optical imaging lens of embodiment 5 of the present application;

fig. 36 is a schematic structural view of an optical imaging lens according to embodiment 6 of the present application;

FIG. 37 is a schematic diagram showing an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6 of the present application;

FIG. 38 is a schematic view showing the astigmatism curves of an optical imaging lens according to embodiment 6 of the present application;

fig. 39 is a schematic diagram showing a distortion curve of an optical imaging lens according to embodiment 6 of the present application;

FIG. 40 is a schematic view of the MTF curve of the optical imaging lens according to embodiment 6 of the present application;

FIG. 41 is a schematic view of the surface type, radius of curvature, thickness, half-caliber and materials of each lens of the optical imaging lens of embodiment 6 of the present application;

fig. 42 is a schematic diagram showing aspherical coefficients of each lens surface of the optical imaging lens of embodiment 6 of the present application;

FIG. 43 is a graph showing the optical parameter data in examples 1-6 of the present application;

FIG. 44 is a graph showing the conditional data in examples 1-6 of the present application;

the reference numerals in the figures illustrate:

1. a first lens; 2. a second lens; 3. a third lens; 4. a fourth lens; 5. and a fifth lens.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application; it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present application are within the protection scope of the present application.

Example 1:

referring to fig. 1, an optical imaging lens includes a first lens element 1, a second lens element 2, a third lens element 3, a fourth lens element 4 and a fifth lens element 5, wherein the first lens element 1 has negative optical power, and an object-side surface of the first lens element 1 is concave; the second lens 2 has positive optical power; the third lens 3 has positive focal power, and the object side surface of the third lens 3 is arranged to be a convex surface; the fourth lens 4 has optical power; the fifth lens 5 has optical power; the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging system satisfy: f/EPD <2.6; the effective focal length f1 of the first lens 1 and the effective focal length f of the optical imaging lens satisfy: -3.5< f1/f < -1.

Wherein, by defining the surface type of the first lens 1, the second lens 2, the third lens 2, the fourth lens 4 and the fifth lens 5 and the focal power thereof, the optical imaging system can have good imaging quality; the light quantity of the lens can be effectively increased by controlling the range of the effective focal length of the optical imaging lens and the ratio of the entrance pupil diameter of the optical imaging lens, and the imaging quality of the lens in a dark environment is improved; by controlling the contribution of the focal power of the first lens in the focal length of the whole optical imaging lens, the deflection angle of light rays can be reduced, and the imaging quality of the optical imaging lens is improved.

The on-axis distance TTL from the object side surface of the first lens element 1 to the image side surface of the fifth lens element 5 and half of the diagonal length ImgH of the effective pixel region on the imaging surface satisfy: TTL/ImgH is less than 2.5 and less than 7.0.

The overall size of the imaging lens can be effectively shortened by controlling the ratio of the on-axis distance from the object side surface of the first lens element 1 to the image side surface of the fifth lens element 5 to half of the diagonal length of the effective pixel area on the imaging surface, so that the lens group can better meet the size requirement.

Half of the maximum field angle of the optical imaging lens, semi-FOV, satisfies: the 80 DEG is less than or equal to 2X semi-FOV is less than or equal to 180 deg.

The half field angle of the optical imaging lens is controlled, so that a larger field range can be obtained, and the collection capability of the optical imaging lens group on object space information is improved.

The radius of curvature R9 of the object-side surface of the fifth lens element 5 and the radius of curvature R10 of the image-side surface of the fifth lens element 5 satisfy the following: -2.0 < (R9-R10)/(R9+R10) < 12.0.

The ratio of the difference of the curvature radiuses of the object side surface and the image side surface of the fifth lens 5 to the sum of the curvature radiuses is limited in a certain range, so that the coma aberration of the on-axis view field and the off-axis view field is smaller, and the imaging quality of the optical imaging lens is ensured.

The sum Σat of the air intervals on the optical axis between the first lens 1 to any adjacent two lenses having optical power closest to IR satisfies: Σat <3.5mm.

The interval between each surface of the lens is reasonably controlled, so that overlarge light deflection is avoided, and the difficulty of lens processing and assembly is reduced.

The radius of curvature R2 of the image side surface of the first lens element 1 and the radius of curvature R3 of the object side surface of the second lens element 2 satisfy: -0.5 < R2/R3 < 1.0, the radius of curvature R3 of the object-side surface of the second lens element 2 and the radius of curvature R4 of the image-side surface of the second lens element 2 satisfying: -2.0 < R4/R3 < 1.5.

The curvature radius of the image side surface of the first lens element 1 and the curvature radius of the object side surface of the second lens element 2 are controlled, so that spherical aberration of an optical system can be effectively eliminated, an image with high definition can be obtained, the shape of the second lens element 2 can be effectively restrained by limiting the ratio range of the curvature radii of the object side surface and the image side surface of the second lens element 2, the aberration contribution rate of the object side surface and the image side surface of the second lens element 2 can be effectively controlled, the aberration related to an aperture zone of the system can be effectively balanced, and the imaging quality of the system can be effectively improved.

The curvature radius R8 of the image side surface of the fourth lens element 4 and the center thickness CT4 of the fourth lens element 4 on the optical axis satisfy: -2.0 < R8/CT 4< 3.5, the central thickness CT3 of the third lens 3 on the optical axis and the central thickness CT4 of the fourth lens 4 on the optical axis satisfying: CT3/CT4 is more than 0.5 and less than 4.5.

Wherein, by restricting the ratio of the curvature radius of the image side surface of the fourth lens 4 to the center thickness of the fourth lens 4 on the optical axis within a certain range, the optical element can be ensured to have good processability, the center thicknesses of the fourth lens 4 and the third lens 3 can be reasonably configured, and the thickness sensitivity of the lens can be reduced.

The effective focal length f1 of the first lens 1 and the radius of curvature R1 of the object side surface of the first lens 1 satisfy: -1< f1/R1<1.

The ratio of the effective focal length of the first lens 1 to the curvature radius of the object side surface is restricted, so that deflection of incident light rays of the optical imaging lens on the first lens 1 can be effectively controlled, and the sensitivity of the optical imaging lens is reduced.

The effective focal length f2 of the second lens 2 and the curvature radius R4 of the image side surface of the second lens 2 satisfy: -4.0< f2/R4<8.0.

Wherein, the curvature of field contribution of the image side surface of the second lens 2 is in a reasonable range by controlling the ratio of the effective focal length of the second lens 2 to the curvature radius of the image side surface.

The effective focal length f3 of the third lens 3, the effective focal length f4 of the fourth lens 4, and the effective focal length f5 of the fifth lens 5 satisfy: -3.5< (f3+f4)/f5 < 0.

Wherein, by controlling the effective focal length of the third lens 3, the fourth lens 4 and the ratio of the effective focal length of the fifth lens 5 within a certain range, the off-axis aberration of the system is balanced.

Example 1:

an optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 7. Fig. 1 shows a schematic configuration diagram of an optical imaging lens according to embodiment 1 of the present application.

As shown in fig. 1, an optical imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: the first lens E1, the second lenses E2, STO, the third lens E3, the fourth lens E4, the fifth lens E5, the filter E6, and the imaging surface S13.

The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The chip protection glass E6 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.

Fig. 2 shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens.

Fig. 3 shows an astigmatism curve of the optical imaging lens of embodiment 1, which represents meridional image plane curvature and sagittal image plane curvature.

Fig. 4 shows distortion curves of the optical imaging lens of embodiment 1, which represent corresponding distortion magnitude values at different image heights.

Fig. 5 shows MTF curves of the optical imaging lens of example 1, which represent MTF values of the central field of view, the 0.5 field of view meridian direction, the 0.5 field of view sagittal direction, the 1.0 field of view meridian direction, and the 1.0 field of view sagittal direction at different spatial frequencies, wherein the full field angle corresponding to the 1.0 field of view is 166.8 °.

Fig. 6 shows the surface type, radius of curvature, thickness, half caliber and material of each lens of the optical imaging lens of embodiment 1, wherein the units of the radius of curvature, half caliber and thickness are millimeters (mm).

Fig. 7 shows aspherical coefficients of respective lens surfaces of the optical imaging lens of embodiment 1.

The optical imaging lens given in embodiment 1 can achieve good imaging quality.

Example 2:

an optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 8 to 14. Fig. 8 shows a schematic structural diagram of an optical imaging lens according to embodiment 2 of the present application.

As shown in fig. 8, an optical imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: the first lens E1, the second lenses E2, STO, the third lens E3, the fourth lens E4, the fifth lens E5, the filter E6, and the imaging surface S13.

The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is concave and an image-side surface S4 thereof is convex. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The chip protection glass E6 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.

Fig. 9 shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens.

Fig. 10 shows an astigmatism curve of the optical imaging lens of embodiment 2, which represents meridional image plane curvature and sagittal image plane curvature.

Fig. 11 shows distortion curves of the optical imaging lens of embodiment 2, which represent corresponding distortion magnitude values at different image heights.

Fig. 12 shows MTF curves of the optical imaging lens of example 2, which represent MTF values of the central field of view, the 0.5 field of view meridian direction, the 0.5 field of view sagittal direction, the 1.0 field of view meridian direction, and the 1.0 field of view sagittal direction at different spatial frequencies, wherein the full field angle corresponding to the 1.0 field of view is 131.3 °.

Fig. 13 shows the surface type, radius of curvature, thickness, half caliber and material of each lens of the optical imaging lens of embodiment 2, wherein the units of the radius of curvature, half caliber and thickness are millimeters (mm).

Fig. 14 shows aspherical coefficients of respective lens surfaces of the optical imaging lens of embodiment 2.

The optical imaging lens given in embodiment 2 can achieve good imaging quality.

Example 3:

an optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 15 to 21. Fig. 15 shows a schematic configuration diagram of an optical imaging lens according to embodiment 3 of the present application.

As shown in fig. 15, an optical imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: the first lens E1, the second lenses E2, STO, the third lens E3, the fourth lens E4, the fifth lens E5, the filter E6, and the imaging surface S13.

The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is concave, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is convex and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is convex. The chip protection glass E6 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.

Fig. 16 shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens.

Fig. 17 shows an astigmatism curve of the optical imaging lens of embodiment 3, which represents meridional image plane curvature and sagittal image plane curvature.

Fig. 18 shows a distortion curve of the optical imaging lens of embodiment 3, which represents the corresponding distortion magnitude values at different image heights.

Fig. 19 shows MTF curves of the optical imaging lens of example 3, which represent MTF values of the central field of view, the 0.5 field of view meridian direction, the 0.5 field of view sagittal direction, the 1.0 field of view meridian direction, and the 1.0 field of view sagittal direction at different spatial frequencies, wherein the full field angle corresponding to the 1.0 field of view is 96 °.

Fig. 20 shows the surface type, radius of curvature, thickness, half caliber and material of each lens of the optical imaging lens of embodiment 3, wherein the units of the radius of curvature, half caliber and thickness are millimeters (mm).

Fig. 21 shows aspherical coefficients of each lens surface of the optical imaging lens of embodiment 3.

The optical imaging lens given in embodiment 3 can achieve good imaging quality.

Example 4:

an optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 22 to 28. Fig. 22 shows a schematic configuration diagram of an optical imaging lens according to embodiment 4 of the present application.

As shown in fig. 22, the optical imaging lens according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: a first lens E1, a second lens E2, a third lens E3, STO, a fourth lens E4, a fifth lens E5, a filter E6, and an imaging surface S13.

The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is concave and an image-side surface S4 thereof is convex. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is convex. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave and an image-side surface S10 thereof is convex. The chip protection glass E6 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.

Fig. 23 shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens.

Fig. 24 shows an astigmatism curve of the optical imaging lens of embodiment 4, which represents meridional image plane curvature and sagittal image plane curvature.

Fig. 25 shows a distortion curve of the optical imaging lens of embodiment 4, which represents the corresponding distortion magnitude values at different image heights.

Fig. 26 shows MTF curves of the optical imaging lens of example 4, which represent MTF values of the central field of view, the 0.5 field of view meridian direction, the 0.5 field of view sagittal direction, the 1.0 field of view meridian direction, and the 1.0 field of view sagittal direction at different spatial frequencies, wherein the full field angle corresponding to the 1.0 field of view is 166.5 °.

Fig. 27 shows the surface type, radius of curvature, thickness, half caliber, and material of each lens of the optical imaging lens of embodiment 4, wherein the units of the radius of curvature, half caliber, and thickness are millimeters (mm).

Fig. 28 shows aspherical coefficients of each lens surface of the optical imaging lens of embodiment 4.

The optical imaging lens given in embodiment 4 can achieve good imaging quality.

Example 5:

an optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 29 to 35. Fig. 29 shows a schematic configuration diagram of an optical imaging lens according to embodiment 5 of the present application.

As shown in fig. 29, the optical imaging lens according to the exemplary embodiment of the present application sequentially includes, from an object side to an image side along an optical axis: a first lens E1, a second lens E2, a third lens E3, STO, a fourth lens E4, a fifth lens E5, a filter E6, and an imaging surface S13.

Fig. 30 shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which indicates the deviation of the converging focus after light rays of different wavelengths pass through the lens.

Fig. 31 shows an astigmatism curve of the optical imaging lens of embodiment 5, which represents meridional image plane curvature and sagittal image plane curvature.

Fig. 32 shows distortion curves of the optical imaging lens of embodiment 5, which represent corresponding distortion magnitude values at different image heights.

Fig. 33 shows MTF curves of the optical imaging lens of example 5, which represent MTF values of the central field of view, the 0.5 field of view meridian direction, the 0.5 field of view sagittal direction, the 1.0 field of view meridian direction, and the 1.0 field of view sagittal direction at different spatial frequencies, wherein the full field angle corresponding to the 1.0 field of view is 137.8 °.

Fig. 34 shows the surface type, radius of curvature, thickness, half caliber, and material of each lens of the optical imaging lens of embodiment 5, wherein the units of the radius of curvature, half caliber, and thickness are millimeters (mm).

Fig. 35 shows aspherical coefficients of each lens surface of the optical imaging lens of embodiment 5.

The optical imaging lens given in embodiment 5 can achieve good imaging quality.

Example 6:

an optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 36 to 42. Fig. 36 shows a schematic configuration diagram of an optical imaging lens according to embodiment 6 of the present application.

As shown in fig. 36, an optical imaging lens according to an exemplary embodiment of the present application sequentially includes, along an optical axis from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, STO, a fourth lens E4, a fifth lens E5, a filter E6, and an imaging surface S13.

The first lens element E1 has negative refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has positive refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is convex. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is concave, and an image-side surface S6 thereof is convex. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is convex, and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave, and an image-side surface S10 thereof is concave. The chip protection glass E6 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.

Fig. 37 shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the lens.

Fig. 38 shows an astigmatism curve of the optical imaging lens of embodiment 6, which represents meridional image plane curvature and sagittal image plane curvature.

Fig. 39 shows a distortion curve of the optical imaging lens of embodiment 6, which represents the corresponding distortion magnitude values at different image heights.

Fig. 40 shows MTF curves of the optical imaging lens of example 6, which represent MTF values of the central field of view, the 0.5 field of view meridian direction, the 0.5 field of view sagittal direction, the 1.0 field of view meridian direction, and the 1.0 field of view sagittal direction at different spatial frequencies, wherein the full field angle corresponding to the 1.0 field of view is 96 °.

Fig. 41 shows the surface type, radius of curvature, thickness, half caliber, and material of each lens of the optical imaging lens of embodiment 6, wherein the units of the radius of curvature, half caliber, and thickness are millimeters (mm).

Fig. 42 shows aspherical coefficients of each lens surface of the optical imaging lens of embodiment 6.

The optical imaging lens given in embodiment 6 can achieve good imaging quality.

It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment contains only one independent technical solution, and that such description is provided for clarity only, and that the technical solutions of the embodiments may be appropriately combined to form other embodiments that will be understood by those skilled in the art.

Claims

1. Optical imaging lens, its characterized in that: comprising the following steps:

a first lens (1), wherein the first lens (1) has negative focal power, and the object side surface of the first lens (1) is provided with a concave surface;

a second lens (2), the second lens (2) having positive optical power;

the third lens (3), the said third lens (3) has positive focal power, and the third lens (3) thing side sets up to the convexity;

a fourth lens (4), the fourth lens (4) having optical power;

a fifth lens (5), the fifth lens (5) having optical power;

the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging system satisfy: f/EPD <2.6;

an effective focal length f1 of the first lens (1) and an effective focal length f of the optical imaging lens satisfy: -3.5< f1/f < -1.

2. The optical imaging lens of claim 1, wherein: the on-axis distance TTL from the object side surface of the first lens element (1) to the image side surface of the fifth lens element (5) and half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy the following conditions: TTL/ImgH is less than 2.5 and less than 7.0.

3. The optical imaging lens of claim 1, wherein: half of the half-FOV of the maximum field angle of the optical imaging lens satisfies: the 80 DEG is less than or equal to 2X semi-FOV is less than or equal to 180 deg.

4. The optical imaging lens of claim 1, wherein: the radius of curvature R9 of the object-side surface of the fifth lens element (5) and the radius of curvature R10 of the image-side surface of the fifth lens element (5) satisfy the following conditions: -2.0 < (R9-R10)/(R9+R10) < 12.0.

5. The optical imaging lens of claim 1, wherein: the sum sigma AT of the air intervals on the optical axis between the first lens (1) and any adjacent two lenses having optical power closest to IR satisfies: Σat <3.5mm.

6. The optical imaging lens of claim 1, wherein: the curvature radius R2 of the image side surface of the first lens (1) and the curvature radius R3 of the object side surface of the second lens (2) satisfy the following conditions: -0.5 < R2/R3 < 1.0, the radius of curvature R3 of the object-side surface of the second lens (2) and the radius of curvature R4 of the image-side surface of the second lens (2) satisfying: -2.0 < R4/R3 < 1.5.

7. The optical imaging lens of claim 1, wherein: the curvature radius R8 of the image side surface of the fourth lens (4) and the center thickness CT4 of the fourth lens (4) on the optical axis satisfy the following conditions: -2.0 < R8/CT 4< 3.5, the central thickness CT3 of the third lens (3) on the optical axis and the central thickness CT4 of the fourth lens (4) on the optical axis satisfying: CT3/CT4 is more than 0.5 and less than 4.5.

8. The optical imaging lens of claim 1, wherein: the effective focal length f1 of the first lens (1) and the curvature radius R1 of the object side surface of the first lens (1) satisfy: -1< f1/R1<1.

9. The optical imaging lens of claim 1, wherein: the effective focal length f2 of the second lens (2) and the curvature radius R4 of the image side surface of the second lens (2) satisfy: -4.0< f2/R4<8.0.

10. The optical imaging lens of claim 1, wherein: an effective focal length f3 of the third lens (3), an effective focal length f4 of the fourth lens (4), and an effective focal length f5 of the fifth lens (5) satisfy: -3.5< (f3+f4)/f5 < 0.