CN113866936A

CN113866936A - Optical lens, camera module and electronic equipment

Info

Publication number: CN113866936A
Application number: CN202010615939.4A
Authority: CN
Inventors: 周勇; 贾远林; 陈洪福; 周少飞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-12-31
Anticipated expiration: 2040-06-30
Also published as: CN113866936B; WO2022001589A1

Abstract

The application provides an optical lens, a lens module and an electronic device. The first lens of the optical lens has negative focal power, the second lens has positive focal power, the third lens has positive focal power, the fourth lens has positive focal power, the fifth lens has negative focal power, the fifth lens is an M-shaped lens, and at least one reverse curve point exists on at least one surface of the object side surface and the image side surface of the fifth lens. By matching the lenses with different structures and different focal powers, the optical lens with small F # value of aperture, large incident angle of chief ray, large field angle, small total optical length and other performances can be obtained, so that the optical lens can meet various use scenes and various use requirements.

Description

Optical lens, camera module and electronic equipment

Technical Field

The embodiment of the application relates to the field of lenses, in particular to an optical lens, a camera module and electronic equipment.

Background

With the progress of the camera technology, the performance requirements for the camera are higher and higher. For example, the camera is required to have a small F # value, a large incident angle of the principal ray, a large field angle, and a small total optical length at the same time, so that the camera can have good functions such as night view shooting and background blurring, high resolution performance, and a small length. In the prior art, the camera can generally only satisfy one characteristic of small aperture F # value, large chief ray incident angle or small optical total length, and it is difficult to have the camera which can simultaneously have small aperture F # value, large chief ray incident angle, large field angle and small optical total length.

Disclosure of Invention

The embodiment of the application provides an optical lens, include optical lens's camera module, and include camera module's electronic equipment aims at obtaining an optical lens that can have performance such as little light ring F # value, big chief ray incident angle and little optics total length simultaneously.

In a first aspect, an optical lens is provided. The optical lens is provided with five lenses or six lenses, and when the optical lens is provided with five lenses, the five lenses are respectively a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged from an object side to an image side; when the optical lens has six lenses, the six lenses are respectively a first lens, a second lens, a third lens, a fourth lens, a supplementary lens and a fifth lens which are sequentially arranged from an object side to an image side, and the first lens, the second lens, the third lens, the fourth lens and the fifth lens all comprise an object side surface facing the object side and an image side surface facing the image side. The first lens has negative focal power, the second lens has positive focal power, the third lens has positive focal power, the fourth lens has positive focal power, the fifth lens has negative focal power, the fifth lens is an M-shaped lens, and at least one inflection point exists on at least one of the object side surface and the image side surface of the fifth lens. The aperture value F # of the optical lens satisfies: f # is more than or equal to 0.8 and less than or equal to 2.8; the relation between the effective focal length EFFL of the optical lens and the total optical length TTL of the optical lens meets the following requirements: EFFL/TTL is more than or equal to 0.2 and less than or equal to 0.9.

In the embodiment of the application, the first lens is a negative focal power lens, so that light outside a field of view can be effectively collected and converged into an optical system, and the design of a large field angle is facilitated. The second lens is a positive focal power lens, so that light rays with a large aperture and a large field of view can be converged, the aperture of the lens is reduced, and the design of the large-aperture lens is facilitated. The third lens can correct the residual aberration of the lens and improve the imaging quality of the lens. Wherein the third lens power may be positive or negative. The fourth lens is a positive focal power lens, can bear the main focal power of the lens, is favorable for improving the aperture of the lens and further is favorable for realizing the design of a large aperture. The fifth lens is an M-shaped lens with negative focal power, at least one surface of the object side surface and the image measuring surface of the fifth lens has at least one inflection point, and the characteristic that the fifth lens is M-shaped is utilized to be beneficial to improving the incidence angle of the chief ray of the lens, so that the design of a large chief ray incidence angle is facilitated. In the embodiment of the application, five or six lenses with different structures and different focal powers are matched with each other, so that the optical lens with small F # aperture value, large incident angle of chief ray, large field angle, small total optical length and other performances can be obtained, and the optical lens can meet various use scenes and various use requirements. In the embodiment of the present application, the aperture value F # that the optical lens satisfies: f # is not less than 0.8 and not more than 2.8, and the aperture value F # of the optical lens meets the following requirements: f # is more than or equal to 0.8 and less than or equal to 2.8. The aperture of the optical lens of this application can be less to value F # promptly, can cover the application demand to big aperture on the market, realizes providing the purpose of a big aperture camera lens. The number of the lenses of the optical lens is five or six, that is, the number of the optical lens of the present application is small, and the optical lens 10 can have a small total optical length by matching the structure and the focal power of the lens. In this application, a relationship between the effective focal length EFFL of the optical lens and the total optical length TTL of the optical lens satisfies: EFFL/TTL is more than or equal to 0.2 and less than or equal to 0.9, and the optical lens can have smaller optical total length, so that the optical lens can have the characteristic of miniaturization and is better suitable for miniaturized electronic equipment.

In some embodiments, at least one of the second lens and the fourth lens is a glass lens and the other lenses of the optical lens are plastic lenses. Because the cost of plastics lens can be lower than the cost of glass lens, in this application implementation mode, other lenses are the plastics material lens, for all adopt the camera of glass lens among the prior art, adopt the mode that the lens of glass material lens and plastics material mixes, can greatly reduced camera lens cost, are favorable to realizing the low-cost design of optical lens. Moreover, the relation of the refractive index of the glass lens along with the temperature change satisfies dn/dT >0, and the relation of the refractive index of the plastic lens along with the temperature change satisfies dn/dT < 0, so the optimal image plane drift (namely temperature drift) caused by environmental change of the optical lens can be corrected by utilizing the temperature characteristics of the glass lens and the plastic lens, and the optical lens can clearly image in the whole temperature range of at least-40 ℃ to +85 ℃ without a focusing mode such as a motor. In this embodiment, at least one of the second lens and the fourth lens is a glass lens, and the second lens and the fourth lens are both lenses with positive focal power, so that the best image plane drift of the optical lens can be better corrected.

The object side surface and the image side surface of the second lens are convex surfaces at the paraxial position, and the object side surface and the image side surface of the fourth lens are convex surfaces at the paraxial position. When the second lens and/or the fourth lens are glass lenses, the object side surface and the image side surface of the second lens and/or the fourth lens are convex surfaces at paraxial positions, so that the value of dn/dT of the second lens and/or the fourth lens is larger, and the second lens or the fourth lens can have a better effect of correcting the temperature drift of the optical lens.

The object side surface of the first lens is concave at the paraxial region. When the object side surface of the first lens is a concave surface at the paraxial part, the large-aperture lens can be effectively dispersed to a larger aperture, the correction of the spherical aberration of the large-aperture lens is facilitated, and the design of the large-aperture lens is further facilitated.

The object side surface of the third lens is a convex surface at the paraxial region, and the image side surface of the third lens is a concave surface at the paraxial region. The object side surface of the third lens is a convex surface at the paraxial region, and when the image side surface is a concave surface at the paraxial region, the phase difference generated by the third lens per se can be smaller, so that the residual aberration of the optical lens can be better corrected, and the imaging quality of the optical lens can be improved.

The object side surface of the fifth lens can be a concave surface or a convex surface at the paraxial region, and the image side surface of the fifth lens is a concave surface at the paraxial region, so that the effect of increasing the incident angle of the principal ray of the optical lens can be better realized.

In some embodiments, the focal length f of the fourth lens₄The relationship with the focal length EFFL of the optical lens satisfies: f is not less than 0.5₄/EFFL is less than or equal to 2.0. In the embodiment of the present application, since the fourth lens bears the main focal power of the optical lens, when the focal length f of the fourth lens is larger₄When the above relationship is satisfied with the focal length EFFL of the optical lens, the design of the large aperture can be realized more easily.

In some embodiments, the relationship between the effective focal length EFFL of the optical lens and the maximum image height IH of the optical lens satisfies: EFFL/IH is more than or equal to 0.4 and less than or equal to 2.0. In the embodiments of the present application, when the optical lens satisfies the above relationship, the optical lens can realize a large image height. The larger the image height which can be obtained by the optical lens is, the larger the field angle of the optical lens is, the higher the pixels of the adaptable photosensitive element are, so that the optical lens can have the characteristics of large field of view and high pixels.

In some embodiments, the relationship between the effective focal length EFFL and the aperture F # of the optical lens and the total optical length TTL of the optical lens satisfies: EFFL/(F #. times TTL) is more than or equal to 0.1 and less than or equal to 0.5. In the embodiments of the present application, when the optical lens satisfies the above relationship, the optical lens can have both a large aperture and a small size.

In some embodiments, the relationship between the effective focal length EFFL, the total optical length TTL, the maximum image height IH and the F # of the optical lens satisfies: (IH multiplied by EFFL)/(F # × TTL2) is less than or equal to 0.3. In the embodiment of the present application, when the optical lens satisfies the above relationship, the maximum image height IH of the optical lens is large, and the aperture value F # and the total optical length TTL are small, so that the optical lens can combine the characteristics of a large aperture, miniaturization, a large field angle, and high pixel.

In some embodiments, the field angle FOV of the optical lens satisfies that FOV is greater than or equal to 40 ° and less than or equal to 140 °, that is, in the embodiments of the present application, the variation range of the field angle FOV of the optical lens may be relatively large, so that an optical lens with any field angle can be designed according to actual needs. In some embodiments of the present application, the field angle of the optical lens can reach 140 ° at most, so that the optical lens can have a larger shooting field of view.

In some embodiments, the abbe number v2 of the second lens and the abbe number v3 of the third lens satisfy the relationship: and | v2-v3| ≧ 15. When the abbe number v2 of the second lens and the abbe number v3 of the third lens satisfy the above relationship, the third lens can more easily achieve the purpose of correcting chromatic aberration, improve the imaging quality of the optical lens, and enhance the resolving power of the optical lens.

In some embodiments, the abbe number v4 of the fourth lens and the abbe number v3 of the third lens satisfy the relationship: and | v4-v3| ≧ 15. When the abbe number v4 of the fourth lens and the abbe number v3 of the third lens satisfy the above relationship, the third lens can more easily achieve the purpose of correcting chromatic aberration, further improve the imaging quality of the optical lens, and enhance the resolving power of the optical lens.

In some embodiments, the supplemental lens has optical power, and the abbe number v5 of the supplemental lens and the abbe number v4 of the fourth lens satisfy the relationship: and | v4-v5| ≧ 15. In the present embodiment, the optical power of the complementary lens can be positive or negative, and the object-side surface and the image-side surface can be convex or concave at the paraxial region. The supplementary lens is arranged between the fourth lens and the fifth lens, so that the residual aberration of the system can be effectively corrected, and the imaging quality of the optical lens is improved. When the abbe number of the supplementary lens and the abbe number v4 of the fourth lens satisfy the above relationship, the objective of correcting chromatic aberration can be achieved more easily.

In a second aspect, the present application further provides a camera module, which includes a photosensitive element and the optical lens, where the photosensitive element is located on the image side of the optical lens, and the photosensitive element is used to convert the optical signal transmitted by the optical lens into an electrical signal.

The camera module of the present application includes the optical lens and a photosensitive element. When the camera works, light reflected by an external scene is refracted by the optical lens and then imaged on the photosensitive element, and the photosensitive element converts an optical signal of the image into an electric signal, so that the image is shot. In this application, because optical lens can have performance such as little light ring F # value, big chief ray incident angle and big chief ray incident angle simultaneously, make the camera module can all present the imaging effect of preferred under the applied scene of difference.

In a third aspect, the present application provides an electronic device. The electronic equipment comprises an image processor and the camera module, wherein the image processor is in communication connection with the camera module, the camera module is used for acquiring image data and inputting the image data into the image processor, and the image processor is used for processing the image data output from the image processor. It should be noted that, in the present application, the image processor may be an image processing chip, or an image processing circuit, or an image processing algorithm code for performing image processing.

When using in electronic equipment during the camera module, because the camera module can all show the formation of image effect of preferred under the application scene of difference, consequently, the electronic equipment including this camera module can be applicable to various application scenes to improve electronic equipment's image quality, have better practical application and worth.

Drawings

Fig. 1 is a schematic structural diagram of an electronic device according to the present application.

Fig. 2 is a schematic diagram of an internal structure of the electronic device according to the embodiment shown in fig. 1.

Fig. 3 is a schematic structural diagram of a lens module according to an embodiment of the present application.

Fig. 4 is a partial structural schematic diagram of an optical lens 10 according to a first embodiment of the present application.

Fig. 5 is a schematic diagram of axial chromatic aberration of light with wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens according to the first embodiment.

Fig. 6 is a graph of the incident angle of the principal ray of the optical lens according to the first embodiment.

Fig. 7a is a temperature drift modulation contrast curve at normal temperature of the optical lens of the first embodiment.

FIG. 7b is a temperature drift modulation contrast curve at-30 ℃ for the optical lens of the first embodiment.

Fig. 7c is a temperature drift modulation contrast curve of the optical lens of the first embodiment at +70 ℃.

Fig. 8 is a partial structural schematic diagram of an optical lens 10 according to a second embodiment of the present application.

Fig. 9 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens of the second embodiment.

Fig. 10 is a graph of the incident angle of the principal ray of the optical lens according to the second embodiment.

Fig. 11a is a temperature drift modulation contrast curve at normal temperature of the optical lens of the second embodiment.

FIG. 11b is a temperature drift modulation contrast curve at-30 ℃ for the optical lens of the second embodiment.

Fig. 11c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens of the second embodiment.

Fig. 12 is a partial structural schematic diagram of an optical lens 10 according to a third embodiment of the present application.

Fig. 13 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens of the third embodiment.

Fig. 14 is a graph of the incident angle of principal rays of the optical lens according to the third embodiment.

Fig. 15a is a temperature drift modulation contrast curve at normal temperature of the optical lens of the third embodiment.

FIG. 15b is a temperature drift modulation contrast curve at-30 ℃ for the optical lens of the third embodiment.

Fig. 15c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens of the third embodiment.

Fig. 16 is a partial structural schematic diagram of an optical lens 10 according to a fourth embodiment of the present application.

Fig. 17 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens of the fourth embodiment.

Fig. 18 is a graph of a chief ray incidence angle of the optical lens of the fourth embodiment.

Fig. 19a is a temperature drift modulation contrast curve at normal temperature of the optical lens of the fourth embodiment.

FIG. 19b is a temperature drift modulation contrast curve at-30 ℃ for the optical lens of the fourth embodiment.

Fig. 19c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens of the fourth embodiment.

Fig. 20 is a partial structural schematic diagram of an optical lens 10 according to a fifth embodiment of the present application.

Fig. 21 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens of the fifth embodiment.

Fig. 22 is a graph of the incident angle of principal rays of the optical lens according to the fifth embodiment.

Fig. 23a is a temperature drift modulation contrast curve at normal temperature of the optical lens of the fifth embodiment.

Fig. 23b is a temperature drift modulation contrast curve at-30 ℃ of the optical lens of the fifth embodiment.

Fig. 23c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens of the fifth embodiment.

Fig. 24 is a partial structural schematic diagram of an optical lens 10 according to a sixth embodiment of the present application.

Fig. 25 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens of the sixth embodiment.

Fig. 26 is a graph showing a chief ray incidence angle of the optical lens according to the sixth embodiment.

Fig. 27a is a temperature drift modulation contrast curve at normal temperature of the optical lens of the sixth embodiment.

FIG. 27b is a temperature drift modulation contrast curve at-30 ℃ for the optical lens of the sixth embodiment.

Fig. 27c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens of the sixth embodiment.

Fig. 28 is a partial structural schematic diagram of an optical lens 10 according to a seventh embodiment of the present application.

Fig. 29 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens of the seventh embodiment.

Fig. 30 is a graph showing a chief ray incident angle of the optical lens according to the seventh embodiment.

Fig. 31a is a temperature drift modulation contrast curve at normal temperature of the optical lens of the seventh embodiment.

FIG. 31b is a temperature drift modulation contrast curve at-30 ℃ for the optical lens of the seventh embodiment.

Fig. 31c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens of the seventh embodiment.

Fig. 32 is a partial structural schematic diagram of an optical lens 10 according to an eighth embodiment of the present application.

Fig. 33 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens of the eighth embodiment.

Fig. 34 is a graph showing a principal ray incidence angle of the optical lens according to the eighth embodiment.

Fig. 35a is a temperature drift modulation contrast curve at normal temperature of the optical lens of the eighth embodiment.

FIG. 35b is a temperature drift modulation contrast curve at-30 ℃ for the optical lens of the eighth embodiment.

Fig. 35c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens of the eighth embodiment.

Fig. 36 is a partial structural schematic view of an optical lens 10 according to a ninth embodiment of the present application.

Fig. 37 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens of the ninth embodiment.

Fig. 38 is a principal ray incidence angle curve of the optical lens of the ninth embodiment.

Fig. 39a is a temperature drift modulation contrast curve at normal temperature of the optical lens of the ninth embodiment.

FIG. 39b is a temperature-drift modulation contrast curve at-30 ℃ for the optical lens of the ninth embodiment.

Fig. 39c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens of the ninth embodiment.

Fig. 40 is a partial structural schematic diagram of an optical lens 10 according to a tenth embodiment of the present application.

Fig. 41 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens of the tenth embodiment.

Fig. 42 is a graph showing a chief ray incidence angle of the optical lens according to the tenth embodiment.

Fig. 43a is a temperature drift modulation contrast curve at normal temperature of the optical lens of the tenth embodiment.

Fig. 43b is a temperature drift modulation contrast curve at-30 ℃ of the optical lens of the tenth embodiment.

Fig. 43c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens according to the tenth embodiment.

Fig. 44 is a partial structural schematic diagram of an optical lens 10 according to an eleventh embodiment of the present application.

Fig. 45 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens of the eleventh embodiment.

Fig. 46 is a principal ray incidence angle curve of the optical lens of the eleventh embodiment.

Fig. 47a is a temperature drift modulation contrast curve at normal temperature of the optical lens of the eleventh embodiment.

FIG. 47b is a temperature-drift modulation contrast curve at-30 ℃ for the optical lens of the eleventh embodiment.

Fig. 47c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens according to the eleventh embodiment.

Fig. 48 is a partial structural schematic view of an optical lens 10 according to a twelfth embodiment of the present application.

Fig. 49 is a schematic view of axial chromatic aberration of light with wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens according to the twelfth embodiment.

Fig. 50 is a graph showing a chief ray incident angle in the optical lens according to the twelfth embodiment.

Fig. 51a is a temperature drift modulation contrast curve at normal temperature of the optical lens of the twelfth embodiment.

FIG. 51b is a temperature-drift modulation contrast curve at-30 ℃ for the optical lens of the twelfth embodiment.

Fig. 51c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens according to the twelfth embodiment.

Fig. 52 is a partial structural schematic view of an optical lens 10 according to a thirteenth embodiment of the present application.

Fig. 53 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens of the thirteenth embodiment.

Fig. 54 is a graph showing a principal ray incidence angle of the optical lens according to the thirteenth embodiment.

Fig. 55a is a temperature drift modulation contrast curve at normal temperature of the optical lens of the thirteenth embodiment.

Fig. 55b is a temperature drift modulation contrast curve at-30 ℃ of the optical lens of the thirteenth embodiment.

Fig. 55c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens according to the thirteenth embodiment.

Fig. 56 is a partial structural schematic diagram of an optical lens 10 according to a fourteenth embodiment of the present application.

Fig. 57 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens of the fourteenth embodiment.

Fig. 58 is a graph showing a principal ray incidence angle of the optical lens according to the fourteenth embodiment.

Fig. 59a is a temperature drift modulation contrast curve at normal temperature of the optical lens of the fourteenth embodiment.

FIG. 59b is a temperature-drift modulation contrast curve at-30 ℃ for the optical lens according to the fourteenth embodiment.

Fig. 59c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens according to the fourteenth embodiment.

Fig. 60 is a partial structural schematic diagram of an optical lens 10 according to a fifteenth embodiment of the present application.

Fig. 61 is a schematic view of axial chromatic aberration of light with wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens according to the fifteenth embodiment.

Fig. 62 is a graph of a chief ray incidence angle of an optical lens according to the fifteenth embodiment.

Fig. 63a is a temperature drift modulation contrast curve at normal temperature of the optical lens of the fifteenth embodiment.

Fig. 63b is a temperature drift modulation contrast curve of the optical lens of the fifteenth embodiment at-30 ℃.

Fig. 63c is a temperature drift modulation contrast curve of the optical lens of the fifteenth embodiment at +70 ℃.

Fig. 64 is a partial structural schematic diagram of an optical lens 10 according to a sixteenth embodiment of the present application.

Fig. 65 is a schematic view of axial chromatic aberration of light with wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens of the sixteenth embodiment.

Fig. 66 is a graph showing a chief ray incidence angle of the optical lens according to the sixteenth embodiment.

Fig. 67a is a temperature drift modulation contrast curve at normal temperature of the optical lens of the sixteenth embodiment.

Fig. 67b is a temperature drift modulation contrast curve at-30 ℃ for the optical lens of the sixteenth embodiment.

Fig. 67c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens according to the sixteenth embodiment.

Fig. 68 is a partial structural schematic view of an optical lens 10 according to a seventeenth embodiment of the present application.

Fig. 69 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens of the seventeenth embodiment.

Fig. 70 is a graph showing a principal ray incidence angle of an optical lens according to the seventeenth embodiment.

Fig. 71a is a temperature drift modulation contrast curve at normal temperature of the optical lens of the seventeenth embodiment.

FIG. 71b is a temperature drift modulation contrast curve at-30 ℃ for the optical lens of the seventeenth embodiment.

Fig. 71c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens according to the seventeenth embodiment.

Fig. 72 is a partial structural schematic view of an optical lens 10 according to an eighteenth embodiment of the present application.

Fig. 73 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens of the eighteen embodiment.

Fig. 74 is a principal ray incidence angle curve of the optical lens of the eighteenth embodiment.

Fig. 75a is a temperature drift modulation contrast curve at normal temperature of the optical lens of the eighteenth embodiment.

FIG. 75b is a temperature-drift modulation contrast curve at-30 ℃ for the optical lens of the eighteenth embodiment.

Fig. 75c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens according to the eighteenth embodiment.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

For convenience of understanding, technical terms related to the present application are explained and described below.

Focal length (f), also called focal length, is a measure of the concentration or divergence of light in an optical system, and refers to the vertical distance from the optical center of a lens or a lens group to an image plane when an infinite scene is formed into a clear image on the image plane through the lens or the lens group. For a thin lens, the focal length is the distance from the center of the lens to the imaging plane; for a thick lens or lens group, the focal length is equal to the effective focal length (EFFL), i.e. the distance between the rear main plane of the lens or lens group and the imaging plane.

The aperture, which is a device for controlling the amount of light transmitted through the lens and into the light-sensing surface in the body, is typically located within the lens. The expressed aperture size is expressed in F/number.

The F-number is a relative value (reciprocal of relative aperture) obtained by the focal length of the lens/the lens light-passing diameter. The smaller the F value of the aperture, the more the amount of light entering the same unit time. The larger the F value of the aperture is, the smaller the depth of field is, and the background content of the shot will be blurred, similar to the effect of a telephoto lens.

Back Focal Length (BFL), the distance from the lens closest to the image side in the optical lens to the imaging surface of the optical lens.

Positive focal power, which may also be referred to as positive focal power, indicates that the lens has a positive focal length and has the effect of converging light.

Negative focal power, which may also be referred to as negative focal power, means that the lens has a negative focal length, and has a divergent light effect.

Total Track Length (TTL), which refers to the total length from the object side surface of the lens closest to the object side of the optical lens to the imaging surface, is a major factor in forming the height of the camera.

The abbe number, i.e. the dispersion coefficient, is the ratio of the refractive index differences of the optical material at different wavelengths, and represents the dispersion range of the material.

The field of view (FOV) is an angle formed by two edges of an optical instrument, which is a vertex of a lens of the optical instrument and a maximum range in which an object image of a target to be measured can pass through the lens. The size of the field angle determines the field of view of the optical instrument, with a larger field angle providing a larger field of view and a smaller optical magnification.

The principal ray: light rays passing through the center of the entrance and exit pupils of the system.

Chief Ray incident Angle (Chief Ray Angle, CRA): the incident angle of the chief ray on the image plane.

Temperature drift: the system has the best image plane offset at a certain temperature and the best image plane offset at normal temperature.

Modulation contrast Function (MTF): an evaluation of the imaging quality of the system.

The optical axis is a ray that passes perpendicularly through the center of the ideal lens. When light rays parallel to the optical axis are incident on the convex lens, the ideal convex lens is that all the light rays converge at a point behind the lens, and the point where all the light rays converge is the focal point. When light propagates along the optical axis, the transmission direction of the light cannot be changed.

The object side is defined by the lens, and the side of the object to be imaged is the object side.

And the image side is the side where the image of the object to be imaged is positioned by taking the lens as a boundary.

The object side surface, the surface of the lens near the object side is called the object side surface.

The surface of the lens near the image side is called the image side surface.

The lens is taken as a boundary, one side of the lens where the object is located is an object side, and the surface of the lens close to the object side can be called an object side surface; the side of the lens adjacent to the image side is the image side, and the surface of the lens adjacent to the image side may be referred to as the image side surface.

Axial chromatic aberration, also known as longitudinal chromatic aberration or positional chromatic aberration or axial chromatic aberration, is a bundle of light rays parallel to the optical axis, which converge at different positions in front and behind after passing through the lens. The imaging positions of the lens for the light with various wavelengths are different, so that the imaging surfaces of the light with different colors cannot be superposed during final imaging, and the polychromatic light is dispersed to form dispersion.

Lateral chromatic aberration, also known as chromatic aberration of magnification, and the difference in magnification of the optical system for different colored light is known as chromatic aberration of magnification. The wavelength causes a change in the magnification of the optical system, with a consequent change in the size of the image.

Distortion (distortion), also known as distortion, is the degree of distortion that an optical system makes to an object relative to the object itself. The distortion is caused by the influence of the spherical aberration of the diaphragm, the intersection point height of the principal rays of different fields of view and the Gaussian image surface after passing through the optical system is not equal to the ideal image height, and the difference between the principal rays and the Gaussian image surface is the distortion. Therefore, the distortion only changes the imaging position of the off-axis object point on the ideal plane, so that the shape of the image is distorted, but the definition of the image is not influenced.

Optical distortion (optical distortion) refers to the degree of deformation that is calculated optically.

Diffraction limit (diffraction limit) means that an ideal object point is imaged by an optical system, and due to the diffraction limit, it is impossible to obtain the ideal image point, but a fraunhofer diffraction image is obtained. Since the aperture of a general optical system is circular, the images of Freund and Fischer diffraction are called Airy spots. Therefore, each object point is like a diffuse spot, two diffuse spots are not well distinguished after being close to each other, the resolution ratio of the system is limited, and the larger the spot is, the lower the resolution ratio is.

The on-axis thickness (TTL1) of the multi-piece lenses is the distance from the intersection of the axis of the optical lens and the object-side surface of the first piece of lens to the intersection of the axis of the optical lens and the image-side surface of the last piece of lens.

The application provides an electronic equipment, electronic equipment can be for security protection surveillance camera head, on-vehicle camera, smart mobile phone, panel computer, portable computer, camera, video recorder, camera or other forms have the equipment of shooing or the function of making a video recording. Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device 1000 according to an embodiment of the present disclosure. In this embodiment, the electronic device 1000 is a security monitoring camera. The application takes the electronic device 1000 as a security monitoring camera as an example for description.

Referring to fig. 2, fig. 2 is a schematic diagram of an internal structure of the electronic device 1000 according to the embodiment shown in fig. 1. The electronic device 1000 includes a lens module 100, and an image processor 200 communicatively connected to the lens module 100. The lens module 100 is used for acquiring image data and inputting the image data into the image processor 200, so that the image processor 200 processes the image data. The communication connection between the lens module 100 and the image processor 200 may include data transmission through electrical connection such as wiring, and data transmission may also be realized through coupling. It is understood that the lens module 100 and the image processor 200 may also be connected in communication by other means capable of realizing data transmission.

The function of the image processor 200 is to optimize the digital image signal through a series of complex mathematical algorithm operations, and finally transmit the processed signal to the display for display. It should be noted that the image processor 200 may be an image processing chip or a digital signal processing chip (DSP), and may be an image processing circuit, etc.

In some embodiments, the electronic device 1000 further includes an analog-to-digital converter (also referred to as an a/D converter) 300. The analog-to-digital conversion module 300 is connected between the lens module 100 and the image processor 200. The analog-to-digital conversion module 300 is configured to convert the signal generated by the lens module 100 into a digital image signal, transmit the digital image signal to the image processor 200, and process the digital image signal by the image processor 200.

In some embodiments, the electronic device 1000 further includes a memory 400, the memory 400 is in communication with the image processor 200, and the image processor 200 processes the digital image signal and then transmits the processed image to the memory 400, so that the image can be searched from the memory and displayed on the display screen at any time when the image needs to be viewed later. In some embodiments, the image processor 200 further compresses the processed image digital signal and stores the compressed image digital signal in the memory 400, so as to save the space of the memory 400. It should be noted that fig. 2 is only a schematic diagram of an internal structure of the electronic device 1000 according to an embodiment of the present disclosure, and positions, structures, and the like of the lens module 100, the image processor 200, the analog-to-digital conversion module 300, and the memory 400 are only shown schematically.

In the embodiment of the present application, the electronic device 1000 further includes a housing 500, and the lens module 100, the image processor 200, the analog-to-digital conversion module 300, the memory 400, and other structures are accommodated in the housing 500, so that the housing 500 protects the structures disposed therein. The housing 500 is provided with an opening 501, the lens module 100 is disposed toward the opening 501, and light rays outside the electronic device 1000 are irradiated into the lens module 100 through the opening 501, i.e., the lens module 100 can shoot a scene outside the electronic device 1000 through the opening 501. In some embodiments, the electronic device 1000 further includes a protective cover 502. The protective cover 502 is a transparent plate, and the protective cover 502 is fixed on the housing 500 and covers the opening 501, so that impurities such as external water, dust and the like are prevented from entering the housing 500 through the opening 501, and the structures contained in the housing 500 are protected.

The lens module 100 includes an optical lens 10 and a light-sensing device 20. The light sensing element 20 is located on the image side of the optical lens 10, and the light sensing element 20 is located on the image plane of the optical lens 10. The imaging plane is a plane where an image of the subject imaged by the optical lens 10 is located. When the lens module 100 is in operation, a subject to be imaged passes through the optical lens 10 and then is imaged on the photosensitive element 20. Specifically, the working principle of the lens module 100 is as follows: the light L reflected by the object is projected to the surface of the light sensing element 20 through the optical lens 10 to generate an optical image, and the light sensing element 20 converts the optical image into an electrical signal, i.e., an analog image signal S1 and transmits the analog image signal S1 to the analog-to-digital conversion module 300, so as to be converted into a digital image signal S2 by the analog-to-digital conversion module 300 and then provided to the image processor 200.

The photosensitive element 20 is a semiconductor chip, and the surface of the photosensitive element includes hundreds of thousands to millions of photodiodes, and when the photosensitive element is irradiated by light, charges are generated and are converted into digital signals through the analog-to-digital conversion module 300. The photosensitive element 20 may be a Charge Coupled Device (CCD) or a complementary metal-oxide semiconductor (CMOS). The CCD 20 is made of a semiconductor material having high sensitivity, and converts light into electric charges, which are converted into digital signals by the adc 300 chip. A CCD consists of many photosites, usually in mega pixels. When the surface of the CCD is irradiated by light, each photosensitive unit converts the light signal irradiated on the surface of the CCD into an electric signal, and the signals generated by all the photosensitive units are added together to form a complete picture. The CMOS mainly uses two semiconductors made of silicon and germanium, so that the semiconductors with N (negative) and P (positive) levels coexist on the CMOS, and the current generated by the two complementary effects can be recorded and interpreted as an image by a processing chip.

The optical lens 10 affects the imaging quality and the imaging effect, and the light of the object forms a clear image on the imaging surface after passing through the optical lens 10, and records the image of the object through the photosensitive element 20 on the imaging surface. In the present application, the optical lens 10 includes a plurality of lenses arranged from an object side to an image side, and each lens is disposed coaxially. The image with better imaging effect is formed by matching each lens. The object side refers to the side of the object, and the image side refers to the side of the imaging plane.

In the present application, the optical lens 10 may be a fixed focal length lens or a zoom lens. The fixed focal length lens is that the positions of the lenses in each component are relatively fixed, so as to ensure that the focal length of the optical lens 10 is fixed. The zoom lens is a lens that can move relative to each other, and changes the focal length of the optical lens 10 by moving the relative position between different lenses. Specifically, in some embodiments, the lens module 100 further includes a driving member connected to at least one lens of the optical lens 10, so as to drive the lens to move by the driving member, thereby changing the distance between different lenses, and thus changing the focal length of the optical lens 10. In some embodiments, the driving member can also drive the lens to move, so as to achieve focusing and anti-shake of the optical lens 10. In the embodiment of the present application, the driving member may have various driving structures such as a motor, and a voice coil motor.

In some embodiments, the optical lens 10 is capable of moving axially relative to the light-sensing element 20 such that the optical lens 10 is closer to or farther from the light-sensing element 20. When the optical lens 10 is a zoom lens and the focal length of the optical lens 10 is changed, the optical lens 10 is moved axially relative to the photosensitive element 20, so that the photosensitive element 20 is always located on the imaging surface of the optical lens, and the optical lens 10 can be ensured to be capable of imaging better at any focal length. It is understood that in some embodiments, when the distance between the lenses in the optical lens 10 is moved to change the focal length of the optical lens 10, the distance between the lenses in the optical lens 10 and the photosensitive element 20 may also be changed, so that the photosensitive element 20 is located on the image plane of the optical lens 10. At this time, the distance between the optical lens 10 and the photosensitive element 20 may be constant.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a lens module 100 according to an embodiment of the present application. In this embodiment, the lens module 100 further includes a fixing base 50(holder), an infrared filter 30, a circuit board 60, and the like. The optical lens 10 further includes a lens barrel 10a, and each lens of the optical lens 10 is fixed in the lens barrel 10a, and the lenses fixed in the lens barrel 10a are coaxially arranged.

The photosensitive element 20 is fixed on the circuit board 60 by bonding or mounting, and the analog-to-digital conversion module 300, the image processor 200, the memory 400, etc. are also fixed on the circuit board 60 by bonding or mounting, so that the communication connection among the photosensitive element 20, the analog-to-digital conversion module 300, the image processor 200, the memory 400, etc. is realized through the circuit board 60. In some embodiments, the mounting base is secured to the circuit board 60. The circuit board 60 may be a Flexible Printed Circuit (FPC) or a Printed Circuit Board (PCB) for transmitting electrical signals, wherein the FPC may be a single-sided flexible board, a double-sided flexible board, a multi-layer flexible board, a rigid flexible board, a hybrid-structured flexible circuit board, or the like. Other elements included in the lens module 100 are not described in detail herein.

In some embodiments, the infrared filter 30 may be fixed on the circuit board 60 and located between the optical lens 10 and the light sensing element 20. The light beam passing through the optical lens 10 is irradiated onto the infrared filter 30 and transmitted to the photosensitive element 20 through the infrared filter 30. The infrared filter can eliminate unnecessary light projected onto the photosensitive element 20, and prevent the photosensitive element 20 from generating false color or moire, so as to improve the effective resolution and color reducibility thereof. In some embodiments, the infrared filter 30 may also be fixed to an end of the optical lens 10 facing the image side.

In some embodiments, the infrared filter 30 may be replaced by an electromagnetic/electromechanical filter switcher (ICR). The ICR is located between the photosensitive element 20 and the lens 11 of the lens 10. Under the condition of sufficient illumination (such as white day), the ICR can automatically add an infrared filter between the photosensitive element and the lens 11 of the optical lens. The light refracted by each lens 11 of the lens 10 is irradiated onto the infrared filter 30, and is transmitted to the photosensitive element 20 through the infrared filter 30. The infrared filter 30 can filter out unnecessary light projected onto the photosensitive element 20, and prevent the photosensitive element 20 from generating false color or moire, so as to improve the effective resolution and color reproducibility thereof, so that the lens can monitor in a color mode. Under the condition of low illumination (such as night or extremely dark light), the ICR can automatically remove the infrared filter, so that the lens is automatically converted into a black-and-white mode for monitoring, and the optical lens can work under any illumination scene.

In some embodiments, the lens 10 further includes a diaphragm 12, and the diaphragm 12 may be disposed on the object side of the plurality of lenses, or between lenses 11 close to the object side of the plurality of lenses. The diaphragm 12 may be an aperture diaphragm 12, and the aperture diaphragm 12 is used to limit the amount of incident light to change the brightness of the image.

In some embodiments, the fixing base 50 is fixed on the circuit board 60, the optical lens 10, the infrared filter 30 and the photosensitive element 20 are all accommodated in the fixing base 50, and the photosensitive element 20, the infrared filter 30 and the optical lens 10 are sequentially stacked above the circuit board 60, so that light passing through the optical lens 10 can irradiate on the infrared filter 30 and be transmitted to the photosensitive element 20 through the infrared filter 30. The lens barrel 10a of the optical lens 10 is connected to the fixed base 50 and can move relative to the fixed base 50, thereby changing the distance between the optical lens 10 and the photosensitive element 20. Specifically, in some embodiments of the present application, the fixing base 50 includes a fixing cylinder 51, an inner wall of the fixing cylinder 51 is provided with an internal thread, an outer wall of the lens barrel 10a is provided with an external thread, and the lens barrel 10a is in threaded connection with the fixing cylinder 51. The lens barrel 10a is connected to a driving member for driving the lens barrel 10a to rotate, so that the lens barrel 10a moves in the axial direction relative to the fixed barrel 51, and the lens of the optical lens 10 is close to or far from the photosensitive element 20. It is understood that the lens barrel 10a may be connected to the fixed base 50 in other manners and may be moved relative to the fixed base 50. For example, the lens barrel 10a and the fixed base 50 are connected by a slide rail. In some embodiments, each lens of the optical lens 10 is disposed in the lens barrel 10a and can move relative to the lens barrel 10a, so that different lenses can move relative to each other to perform focusing.

Referring to fig. 2 and 3 together, in some embodiments of the present application, the optical lens 10 may be a five-lens having five lenses or a six-lens having six lenses. In the embodiment shown in fig. 2 and 3, the optical lens 10 is a five-lens system, and includes a first lens 11, a second lens 12, a third lens 13, a fourth lens 14 and a fifth lens 15, which are sequentially arranged from an object side to an image side. The first lens 11, the second lens 12, the third lens 13, the fourth lens 14 and the fifth lens 15 are all coaxially arranged, that is, the arrangement directions of the lenses are the same. The first lens 11, the second lens 12, the third lens 13, the fourth lens 14, and the fifth lens 15 include an object-side surface facing the object side and an image-side surface facing the image side. Referring to fig. 28, fig. 28 is a schematic partial structure diagram of an optical lens 10 according to a seventh embodiment of the present application. In the embodiment shown in fig. 28, the optical lens 10 is a six-lens system having six lenses, and includes five lenses, namely, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a complementary lens 16 and a fifth lens 15, which are sequentially arranged from an object side to an image side. In the present embodiment, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the complementary lens 16, and the fifth lens 15 are all coaxially disposed, that is, the arrangement directions of the lenses are the same. The first lens element 11, the second lens element 12, the third lens element 13, the fourth lens element 14, the supplemental lens element 16, and the fifth lens element 15 each include an object-side surface facing the object side and an image-side surface facing the image side.

Note that each lens of the present application has a positive refractive power or a negative refractive power, and when a flat mirror is inserted between the lenses, the flat mirror does not function as the lens of the optical lens 10 of the present application. For example, when a plane mirror is inserted between the first lens 11 and the second lens 12, the plane mirror cannot be regarded as the second lens of the optical lens 10 of the present application.

In the embodiment of the present application, the first lens 11 has negative focal power, and can effectively collect and converge the light outside the field of view into the optical system, which is beneficial to realizing the design of a large field angle. In some embodiments of the present disclosure, when the optical lens 10 is applied to an electronic structure such as a monitoring device, the limitation on the size of the diameter of the light incident hole of the optical lens is smaller than when the optical lens 10 is applied to a structure such as a mobile phone, so that the first lens 11 can be a negative focal power lens, and light outside the field of view can be collected and converged in the optical system more effectively than when the first lens is a positive focal power lens. When the object side surface of the first lens 11 is a concave surface at the paraxial region, the large aperture lens head can be effectively dispersed to a larger aperture, which is beneficial to the correction of the spherical aberration of the large aperture lens and further beneficial to the realization of the large aperture design of the optical lens 10. It is understood that in some embodiments of the present application, the object-side surface of the first lens 11 may also be convex at the paraxial region.

The second lens 12 has positive focal power, which is beneficial to converging light rays with a large aperture and a large field of view, and reducing the aperture of the lens, thereby being beneficial to realizing the large aperture design of the optical lens 10. In some embodiments, both the object-side surface and the image-side surface of the second lens 12 are convex paraxially. It is understood that in some embodiments, only one of the object-side surface and the image-side surface of the second lens 12 can be convex, and the other surface can be concave or flat.

The third lens 13 has a focal power, which can effectively correct the residual aberration of the optical lens 10 and improve the imaging quality of the optical lens 10, wherein the focal power of the third lens 13 can be positive or negative. In some embodiments, the object side surface of the third lens 13 is convex at the paraxial region, and the image side surface of the third lens 13 is concave at the paraxial region, so that the phase difference generated by the third lens 13 itself can be small, and the residual aberration of the optical lens 10 can be better corrected, thereby improving the imaging quality of the optical lens 10.

The fourth lens 14 has positive focal power, and can bear the main focal power of the optical lens 10, which is beneficial to increasing the aperture of the optical lens 10, and is further beneficial to realizing the large aperture design of the optical lens 10. In some embodiments, the object-side surface and the image-side surface of the second lens 12 are convex at the paraxial region. It is understood that in some embodiments, only one of the object-side surface and the image-side surface of the second lens 12 can be convex, and the other surface can be concave or flat.

The fifth lens 15 has negative focal power, and the fifth lens 15 is an M-shaped lens, that is, the cross section of the fifth lens 15 cut by a plane passing through the optical axis is M-shaped. In other words, at least one inflection point exists on at least one of the object-side surface and the image-side surface of the fifth lens 15, and the characteristic that the fifth lens 15 is M-shaped is utilized to facilitate the improvement of the incident angle of the chief ray of the lens, thereby facilitating the realization of the design of a large incident angle of the chief ray. The object-side surface of the fifth lens element 15 may be a concave surface or a convex surface at the paraxial region, and the image-side surface thereof may be a concave surface at the paraxial region, so as to better achieve the effect of increasing the incident angle of the principal ray of the optical lens. It is understood that in some embodiments or capabilities, the image-side surface of the fifth lens 15 can also be convex.

The power of the supplemental lens 16 can be positive or negative, and both the object-side surface and the image-side surface can be convex or concave at the paraxial region. The supplementary lens 16 is disposed between the fourth lens 14 and the fifth lens 15, so as to effectively correct residual aberration of the system and improve the imaging quality of the optical lens 10. That is, in the present application, compared with the optical lens 10 with five lens elements, the optical lens 10 with six lens elements has one more light supplement lens element 16, and the residual aberration of the optical lens 10 can be reduced through the light supplement lens element 16, so as to achieve better imaging quality.

In the embodiment of the present application, the lenses with different structures and different focal powers are matched with each other, so that the optical lens 10 having the performance of small F # aperture, large chief ray incident angle, large field angle and the like can be obtained, and the optical lens 10 can satisfy various use scenes and various use requirements. For example, since the optical lens 10 has a smaller aperture F # value (i.e., has a large or extra-large aperture), the optical lens 10 can receive more light energy, so that the optical lens 10 can image clearly in a low-illumination environment. Since the optical lens 10 has a large incident angle of chief rays, the optical lens 10 of the present application can match a photosensitive element of a large incident angle of chief rays. Since the optical lens 10 has a large field angle, a larger range of a subject can be photographed. When the electronic equipment is monitoring equipment, the lens module included in the electronic equipment can have the characteristics of large aperture, high resolution, large field angle and the like, so that the monitoring equipment can monitor a larger field range, and the monitoring dead angle is reduced. Moreover, clear shooting can be performed under the condition of darker illumination, and operations such as amplification of high magnification can be performed on the imaging, so that the requirement of actual use is better met. In the embodiment of the present application, the number of lenses of the optical lens 10 is five or six, that is, the number of the optical lens is small, and the optical lens 10 can have a small total optical length by matching the structure and the optical power of the optical lens 10.

In the embodiment of the present application, each lens of the optical lens 10 may be made of a plastic material, a glass material, or another composite material. Wherein, the plastic material can be easily made into various optical lens structures with complex shapes. The refractive index n1 of the glass lens satisfies the following conditions: n1 is more than or equal to 1.50 and less than or equal to 1.90, and compared with the refractive index range (1.55-1.65) of the plastic lens, the selectable range of the refractive index is larger, so that a thinner glass lens with better performance can be obtained more easily, the on-axis thickness TTL1 of a plurality of lenses of the optical lens 10 can be reduced, and the optical length TTL of the optical lens 10 can be further reduced. Therefore, in some embodiments of the present application, the specific application material of different lenses is reasonably selected according to the needs in consideration of the manufacturing cost, efficiency and optical effect. In some embodiments of the present application, each lens of the optical lens 10 is made of a mixture of a plastic material and a glass material, so that the manufacturing cost of the optical lens 10 is reduced while the optical lens 10 has a small optical length. Moreover, the relation of the refractive index of the glass lens along with the temperature change satisfies dn/dT >0, and the relation of the refractive index of the plastic lens along with the temperature change satisfies dn/dT < 0, so the optimal image plane drift of the optical lens 10 caused by the environmental change can be corrected by utilizing the temperature characteristics of the glass lens and the plastic lens, and the optical lens 10 can focus without a motor and the like and can clearly image in the whole temperature range of at least-40 ℃ to +85 ℃.

In some embodiments of the present application, at least one of the second lens 12 and the fourth lens 14 in the optical lens 10 is a glass lens, and the other lenses of the optical lens 10 are plastic lenses. For example, the optical lens 10 is a five-piece lens including five pieces of lenses, wherein the second lens 12 is a glass lens, and the first lens 11, the third lens 13, the fourth lens 14 and the fifth lens 15 are all plastic lenses. Alternatively, the second lens 12 and the fourth lens 14 are both glass lenses, and the first lens 11, the third lens 13 and the fifth lens 15 are all plastic lenses. In the present embodiment, since the second lens 12 and the fourth lens 14 are both lenses having positive refractive power, and at least one of the second lens 12 and the fourth lens 14 is made of a glass material, the best image plane drift of the optical lens 10 can be better corrected. The object-side surface and the image-side surface of the second lens 12 are convex at the paraxial region, and the object-side surface and the image-side surface of the fourth lens 14 are convex at the paraxial region. When the second lens 12 and/or the fourth lens 14 are glass lenses, the object-side surface and the image-side surface of the second lens 12 and/or the fourth lens 14 are convex at the paraxial region, so that the value of dn/dT of the second lens 12 and/or the fourth lens 14 can be larger, and the second lens 12 or the fourth lens 14 can have a better effect of correcting the temperature drift of the optical lens. The second lens 12 and/or the fourth lens 14 include the second lens 12 or the fourth lens, or the second lens 12 and the fourth lens 14. For example, when the second lens 12 is a glass lens and the object-side surface and the image-side surface of the second lens 12 are both convex at the paraxial region, the value of dn/dT of the second lens 12 is larger, so that the second lens 12 can have a better effect of correcting the temperature drift of the optical lens.

In some embodiments of the present application, the aperture value F # of the optical lens 10 satisfies: f # is more than or equal to 0.8 and less than or equal to 2.8. That is, the aperture to value F # of the optical lens of the present application can be small, and can cover the application demand for a large aperture in the market, and the purpose of providing a large aperture lens is achieved, so that the optical lens 10 can also have a good shooting effect under the condition of insufficient illuminance.

In some embodiments, the relationship between the effective focal length EFFL of the optical lens 10 and the total optical length TTL of the optical lens 10 satisfies: EFFL/TTL is 0.2 ≦ EFFL ≦ 0.9, for example, EFFL/TTL may be 0.5, 0.8. In the embodiment of the present application, when the optical lens 10 satisfies the above relationship, the optical lens 10 can have a small total optical length, so that the optical lens 10 can have a characteristic of miniaturization, and is more suitable for use in a miniaturized electronic device. The EFL, TTL and EFL/TTL at each position of the application have the same meaning, and are not described in detail in the subsequent occurrence. It is understood that in other embodiments of the present application, the EFFL/TTL can be slightly less than 0.2, e.g., 0.19, 0.18, etc.; alternatively, TTL/EFL can be slightly greater than 0.9, e.g., 0.95, 1.0, etc.

In some embodiments, the relationship between the effective focal length EFFL of the optical lens 10 and the maximum image height IH of the optical lens 10 satisfies: EFFL/IH is more than or equal to 0.4 and less than or equal to 2.0. In the present embodiment, when the optical lens 10 satisfies the above relationship, the optical lens 10 can have a large image height, and the optical lens 10 can have characteristics of a large field of view and high pixels. It is understood that in other embodiments of the present application, EFFL/IH may also be slightly less than 0.4, such as 0.35, 0.3, etc.; alternatively, EFFL/IH may be slightly greater than 2.0, e.g., 2.5, 3.0, etc.

In some embodiments, the relationship between the effective focal length EFFL and the aperture value F # of the optical lens 10 and the total optical length TTL of the optical lens 10 satisfies: EFFL/(F #. times TTL) is more than or equal to 0.1 and less than or equal to 0.5. In the present embodiment, when the optical lens 10 satisfies the above relationship, the values of F # and TTL may be small, that is, the optical lens 10 can have both a large aperture and a small size. It is understood that in some other embodiments of the present application, the EFFL/(F # × TTL) may also be slightly less than 0.1, for example, 0.09, 0.08, etc.; or EFFL/(F # × TTL) may be slightly larger than 0.5, for example, 0.55, 0.65, or the like.

In some embodiments, the relationship between the effective focal length EFFL, the total optical length TTL, the maximum image height IH of the optical lens 10 and the F # of the optical lens 10 satisfies: (IH multiplied by EFFL)/(F # × TTL2) is less than or equal to 0.3. In the present embodiment, when the optical lens 10 satisfies the above relationship, the values of F #, TTL, and IH are small and large, so that the optical lens 10 can combine the features of a large aperture, a small size, a large field angle, and a high pixel. It is understood that in some other embodiments of the present application, (IH × EFFL)/(F # × TTL2) may also be slightly larger than 0.3, for example, 0.35, 0.4, etc.

In some embodiments, the field angle FOV of the optical lens 10 is equal to or less than 40 ° and equal to or less than 140 °, that is, in the embodiments of the present application, the variation range of the field angle FOV of the optical lens 10 may be relatively large, so that the optical lens 10 with any field angle can be designed according to actual needs. In some embodiments of the present application, the field angle of the optical lens 10 can be up to 140 ° at maximum, so that the optical lens 10 can have a larger shooting field of view.

In the present application, by reasonably setting parameters (including material, on-axis thickness, surface parameters, etc.) of each lens in each component, the optical power of each component is reasonably allocated to optimize optical parameters such as focal length, abbe number, etc. of each component, so that the optical lens 10 can simultaneously have performance such as small F # value of aperture, large incident angle of chief ray, large field angle, etc. In particular, in some embodiments of the present application, in some embodiments, the focal length f of the fourth lens 14₄The relationship with the focal length EFFL of the optical lens 10 satisfies: f is not less than 0.5₄/EFFL is less than or equal to 2.0. This applicationIn the embodiment, since the fourth lens 14 bears the main power of the optical lens 10, when the focal length f of the fourth lens 14 is larger₄When the above relationship is satisfied with the focal length EFFL of the optical lens 10, the design of the large aperture can be realized more easily.

In some embodiments, the abbe number v2 of the second lens 12 and the abbe number v3 of the third lens 13 satisfy the relationship: and | v2-v3| ≧ 15. When the abbe number v2 of the second lens 12 and the abbe number v3 of the third lens 13 satisfy the above relationship, the third lens 13 can more easily correct chromatic aberration, improve the imaging quality of the optical lens 10, and enhance the resolution of the optical lens 10.

In some embodiments, the abbe number v4 of the fourth lens 14 and the abbe number v3 of the third lens 13 satisfy the relationship: and | v4-v3| ≧ 15. When the abbe number v4 of the fourth lens 14 and the abbe number v3 of the third lens 13 satisfy the above relationship, the third lens 13 can more easily correct chromatic aberration, thereby further improving the imaging quality of the optical lens 10 and enhancing the resolution of the optical lens 10.

When the optical lens 10 is a six-piece lens, the optical lens 10 satisfies the relationship: | v4-v5| ≧ 15, wherein v4 is the abbe number of the fourth lens 14; v5 is the abbe number of the fifth lens from the object side to the image side of the optical lens 10, and v5 represents the abbe number of the complementary lens 16 for the six-lens optical lens 10 of the present application. In the present embodiment, when the abbe number of the supplementary lens 16 and the abbe number of the fourth lens satisfy the above-described relationship, the supplementary lens 16 can more easily achieve the purpose of correcting the color difference.

In some embodiments, when the image-side surface and the object-side surface of each lens are aspheric, the image-side surface and the object-side surface of each lens satisfy the following formula:

wherein z is the rise of the aspheric surface, r is the radial coordinate of the aspheric surface, c is the vertex curvature of the aspheric surface, K is the conic constant, a_iIs the aspheric coefficient and ρ is the normalized axial coordinate.

By the above relation, lenses with different aspheric surfaces are obtained, so that different lenses can achieve different optical effects, and the optical lens 10 with desired performance is obtained by matching different aspheric lenses.

According to the relationship and the range given in some embodiments of the present application, the optical lens 10 can have the performance of small F # aperture, large incident angle of chief ray and large field angle simultaneously by matching different lenses, so that the optical lens 10 can satisfy various use scenes and various use requirements. Meanwhile, a better imaging effect can be obtained.

Some specific, non-limiting examples of embodiments of the present application will be described in more detail below in conjunction with fig. 4-24.

Referring to fig. 4, fig. 4 is a schematic partial structure diagram of an optical lens 10 according to a first embodiment of the present application. In this embodiment, the optical lens 10 is a five-piece lens including five pieces of lenses, which are, in order from an object side to an image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15. The first lens element 11 is a negative power lens element, and has a concave object-side surface at the paraxial region and a convex image-side surface at the paraxial region. The second lens element 12 is a positive power lens element, and both the object-side surface and the image-side surface are convex at the paraxial region. The third lens element 13 is a negative power lens element, and has a convex object-side surface at the paraxial region and a concave image-side surface at the paraxial region. The fourth lens 14 is a positive power lens made of glass, and the object-side surface and the image-side surface of the fourth lens are convex surfaces at paraxial positions. The fifth lens element 15 is an M-shaped lens element having at least one inflection point on both the object-side surface and the image-side surface, wherein the object-side surface is concave at the paraxial region and the image-side surface is concave at the paraxial region. The fourth lens 14 is a glass lens, and the other lenses (including the first lens 11, the second lens 12, the third lens 13, and the fifth lens 15) are all plastic lenses.

The design parameters of the first embodiment of the present application are as follows in table 1.

Table 1 basic parameters of the optical lens 10 of the first embodiment

Focal length EFFL	6.44mm
		F#	2.0
FOV	94°
		IH	9.5mm
Total optical length TTL	11mm
		EFFL/TTL	0.585
EFFL/IH	0.678
		EFFL/(F#×TTL)	0.293
(IH×EFFL)/(F#×TTL2)	0.253
		f4/EFFL	0.74
\|v2-v3\|	35.6
		\|v4-v3\|	29.2
Design wavelength	650nm,610nm,555nm,510nm,470nm

In the above table, the meanings of the symbols in the table are as follows.

EFFL: the effective focal length of the optical lens 10.

F #: the aperture value is a relative value (reciprocal of relative aperture) obtained by the focal length of the lens and the light-passing diameter of the lens, and the smaller the aperture F value is, the larger the amount of light entering in the same unit time is.

FOV: the angle of view of the optical lens 10.

TTL: the optical lens 10 has an optical overall length.

IH: the optical lens 10 has the maximum image height.

f₄: the focal length of the fourth lens from the object side to the image side of the optical lens 10 indicates the focal length of the fourth lens 14 for the purpose of this application.

v 2: for the purposes of the present application, the abbe number of the second lens of the optical lens 10 from the object side to the image side indicates the abbe number of the second lens 12.

v 3: the abbe number of the third lens from the object side to the image side of the optical lens 10 is, for the purposes of the present application, the abbe number of the third lens 13.

v 4: for the purposes of the present application, the abbe number of the fourth lens from the object side to the image side of the optical lens 10 indicates the abbe number of the fourth lens 14.

In the present application, the meanings indicated by the symbols TTL, EFFL, F #, FOV, IH, F4, v2, v3, v4, and the like are the same, and will not be described again in the following.

From the above table, it can be seen that: the optical lens 10 provided in the present embodiment has an F # value of 2.0, an overall optical length TTL of 11mm, an IH of 9.5mm, and an FOV of 94 °, i.e., the optical lens 10 of the present embodiment can simultaneously have characteristics of a large aperture, a large angle of view, a large image height (with high resolution), and a small optical length.

In order to obtain the optical lens 10 having the optical basic parameters in table 1, parameters such as the curvature radius, thickness, refractive index, and abbe number of each lens, and surface coefficients of the object-side surface and the image-side surface of each lens need to be able to be matched to obtain the optical lens 10 having the optical parameters in table 1. Referring to tables 2 and 3, table 2 shows parameters such as curvature radius, thickness, refractive index, and abbe number of each lens in the optical lens 10 according to the embodiment of the present disclosure, and table 3 shows surface coefficients of each lens in the optical lens 10 according to the embodiment of the present disclosure.

Table 2 radius of curvature, thickness, refractive index, abbe number of each lens in the optical lens 10 according to the first embodiment

In the above table, the meanings of the symbols in the table are as follows.

R1: a radius of curvature at a paraxial region of an object side surface of the first lens from the object side to the image side of the optical lens 10. For the purposes of this application, the radius of curvature at the paraxial region of the object-side surface of the first lens 11 is indicated. The paraxial region is a region close to the optical axis of the lens.

R2: a radius of curvature at a paraxial region of an image-side surface of the first lens from the object side to the image side of the optical lens 10. For the purposes of this application, the radius of curvature at the paraxial region of the image side of the first lens 11 is indicated.

R3: a radius of curvature at a paraxial region of an object-side surface of the second lens from the object side to the image side of the optical lens 10. For purposes of this application, the radius of curvature at the paraxial region of the object-side surface of the second lens 12 is indicated.

R4: the curvature radius of the paraxial region of the image-side surface of the second lens from the object side to the image side of the optical lens 10. For purposes of this application, the radius of curvature at the paraxial region of the image-side surface of the second lens 12 is indicated.

Stop: refers to the diaphragm of the optical lens 10, where Infinity indicates that the surface of the diaphragm is a plane.

R5: a radius of curvature at a paraxial region of an object side surface of the third lens from the object side to the image side of the optical lens 10. For the purposes of this application, the radius of curvature at the paraxial region of the object-side surface of the third lens 13 is indicated.

R6: the curvature radius of the optical lens 10 at the paraxial region of the image-side surface of the third lens from the object side to the image side. For the purposes of this application, the radius of curvature at the paraxial region of the image side of the third lens 13 is indicated.

R7: a radius of curvature at a paraxial region of an object side surface of the fourth lens from the object side to the image side of the optical lens 10. For purposes of this application, the radius of curvature at the paraxial region of the object-side surface of fourth optic 14 is shown.

R8: the curvature radius of the image side surface of the fourth lens from the object side to the image side of the optical lens 10 at the paraxial region. For purposes of this application, the radius of curvature at the paraxial region of the image side of the fourth lens 14 is shown.

R9: a radius of curvature at a paraxial region of an object side surface of the fifth lens from the object side to the image side of the optical lens 10. In the present embodiment, the curvature radius of the object-side surface of the fifth lens 15 at the paraxial region is shown.

R10: the curvature radius of the image side surface of the fifth lens from the object side to the image side of the optical lens 10 at the paraxial region. In the present embodiment, the curvature radius of the image side surface of the fifth lens 15 at the paraxial region is shown.

d 1: the on-axis thickness of the first lens from the object side to the image side of the optical lens 10. For purposes of this application, the on-axis thickness of the first lens 11 is indicated.

d 2: the on-axis thickness of the second lens from the object side to the image side of the optical lens 10. For purposes of this application, the on-axis thickness of the second lens 12 is indicated.

d 3: the on-axis thickness of the third lens from the object side to the image side of the optical lens 10. For the purposes of this application, the on-axis thickness of the third lens 13 is indicated.

d 4: the on-axis thickness of the fourth lens from the object side to the image side of the optical lens 10. For purposes of this application, the on-axis thickness of the fourth lens 14 is shown.

d 5: the on-axis thickness of the fifth lens from the object side to the image side of the optical lens 10. In the present embodiment, the on-axis thickness of the fifth lens 15 is shown.

a 1: the on-axis distance between the image side surface of the first lens and the object side surface of the second lens from the object side to the image side of the optical lens 10. For purposes of this application, the on-axis distance between the image-side surface of the first lens 11 and the object-side surface of the second lens 12 is shown.

a 2: the on-axis distance between the image side surface of the second lens and the object side surface of the third lens from the object side to the image side of the optical lens 10. For purposes of this application, the on-axis distance between the image-side surface of the second lens 12 and the object-side surface of the third lens 13 is shown.

a 3: the on-axis distance between the image side surface of the third lens and the object side surface of the fourth lens from the object side to the image side of the optical lens 10. For the purposes of this application, the on-axis distance between the image-side surface of the third mirror 13 and the object-side surface of the fourth mirror 14 is indicated.

a 4: the on-axis distance between the image side surface of the fourth lens and the object side surface of the fifth lens from the object side to the image side of the optical lens 10. For the purposes of this application, the on-axis distance of the image-side surface of the fourth mirror 14 from the object-side surface of the fifth mirror 15 is indicated.

a 5: an on-axis distance from an image side surface of the fifth lens of the optical lens 10 from the object side to the image side to an object side surface of a lens adjacent to the image side surface of the fifth lens or an object side surface of the infrared filter 30. In the present embodiment, since the optical lens 10 is a five-piece lens, the fifth lens is a fifth lens 15, and the image side surface of the fifth lens 15 is adjacent to the infrared filter 30, in the present embodiment, a5 represents the on-axis distance between the image side surface of the fifth lens 15 and the object side surface of the infrared filter 30.

n 1: the refractive index of the first lens from the object side to the image side of the optical lens 10. For the purposes of this application, the refractive index of the first lens 11 is indicated.

n 2: the refractive index of the second lens from the object side to the image side of the optical lens 10. For purposes of this application, the refractive index of the second optic 12 is indicated.

n 3: the refractive index of the third lens from the object side to the image side of the optical lens 10. For the purposes of this application, the refractive index of the third lens 13 is indicated.

n 4: the refractive index of the fourth lens from the object side to the image side of the optical lens 10. For the purposes of this application, the refractive index of the fourth optic 14 is indicated.

n 5: the refractive index of the fifth lens from the object side to the image side of the optical lens 10. In the present embodiment, the refractive index of the fifth lens 15 is shown.

v 1: the refractive index of the first lens from the object side to the image side of the optical lens 10. For the purposes of this application, the abbe number of the first lens 11 is indicated.

v 2: abbe number of the second lens from the object side to the image side of the optical lens 10. For purposes of this application, the abbe number of the second lens 12 is indicated.

v 3: abbe number of the third lens from the object side to the image side of the optical lens 10. For the purposes of this application, the abbe number of the third lens 13 is shown.

v 4: abbe number of the fourth lens from the object side to the image side of the optical lens 10. For purposes of this application, the abbe number of the fourth optic 14 is shown.

v 5: abbe number of the fifth lens from the object side to the image side of the optical lens 10. In the present embodiment, the abbe number of the fifth lens 15 is shown.

It should be noted that, unless otherwise stated, the meanings indicated by the above symbols in the present application are the same when appearing again in the following, and will not be further described.

Each parameter in the table is represented by a scientific notation. For example, -5.24E +00 means-5.24X 100; 3.00E-01 means 3.00X 10-1. The positive and negative of the curvature radius indicate that the optical surface is convex toward the object side or convex toward the image side, and when the optical surface (including the object side surface or the image side surface) is convex toward the object side, the curvature radius of the optical surface is a positive value; when the optical surface (including the object side surface or the image side surface) is convex toward the image side, the optical surface is concave toward the object side, and the radius of curvature of the optical surface is negative.

In the present embodiment, the object-side surface and the image-side surface of each lens are aspheric, and the surface coefficients thereof are aspheric coefficients. The surface coefficients of the respective lenses of the optical lens 10 in the present embodiment are shown in table 3.

Table 3 aspherical surface coefficients of the optical lens 10 of the first embodiment

k

a4

a6

a8

a10

a12

a14

a16

a18

a20

R1

-2.17E-01

3.50E-02

-1.19E-02

2.38E-03

-2.97E-04

2.37E-05

-1.20E-06

3.67E-08

-6.23E-10

4.45E-12

R2

-1.45E+01

4.44E-02

-1.58E-02

3.19E-03

-3.73E-04

2.70E-05

-1.26E-06

3.78E-08

-6.65E-10

5.21E-12

R3

-3.70E+00

1.28E-02

-5.56E-03

2.27E-03

-7.52E-04

1.97E-04

-3.33E-05

3.25E-06

-1.68E-07

3.59E-09

R4

2.23E+01

-1.17E-02

5.63E-03

-2.03E-03

6.07E-04

-1.27E-04

1.72E-05

-1.39E-06

6.10E-08

-1.10E-09

Stop

0.00E+00

R5

4.40E+00

-3.87E-02

2.88E-02

-1.44E-02

5.63E-03

-1.72E-03

3.46E-04

-4.06E-05

2.51E-06

-6.28E-08

R6

1.36E+00

-4.77E-02

3.53E-02

-1.72E-02

6.88E-03

-2.24E-03

4.79E-04

-5.94E-05

3.85E-06

-1.01E-07

R7

-1.05E+01

-1.05E-02

6.33E-03

-2.68E-03

1.17E-03

-4.21E-04

8.92E-05

-1.03E-05

6.10E-07

-1.44E-08

R8

-9.67E-01

-3.42E-03

1.77E-04

-1.73E-05

-1.24E-06

5.60E-07

-9.50E-09

-6.53E-09

6.39E-10

-2.87E-11

R9

-5.00E+01

-7.15E-02

1.40E-02

-1.59E-03

1.18E-05

3.85E-05

-8.08E-06

8.50E-07

-4.75E-08

1.11E-09

R10

-4.99E-01

-7.03E-02

1.83E-02

-4.00E-03

6.44E-04

-7.34E-05

5.70E-06

-2.84E-07

8.22E-09

-1.04E-10

Where K is a conic constant, and symbols such as a4, a6, a8, a10, a12, a14, a16, a18, and a20 represent aspheric coefficients. It should be noted that when the symbols K, a4, a6, a8, a10, a12, a14, a16, a18, a20 and the like in the present application appear again later, the meanings are the same as those herein unless otherwise explained, and the description is not repeated herein.

In the present embodiment, the surface types of the first lens 11 to the fifth lens 15 are all aspheric surfaces, and may be defined by the following aspheric surface formula:

in the present embodiment, it is preferred that,

wherein z is the rise of the aspheric surface, r is the radial coordinate of the aspheric surface, c is the vertex curvature of the aspheric surface, K is the conic constant, and a4, a6, a8, a10, a12, a14, a16, a18 and a20 are aspheric coefficients.

Fig. 5 to 7c are characteristic diagrams of the optical performance of the optical lens 10 of the first embodiment.

Specifically, fig. 5 is a schematic diagram of axial chromatic aberration of light with wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens 10 according to the first embodiment. Which indicates the focal depth position on the image side of the optical lens 10 after light of different wavelengths passes through the optical lens 10. The ordinate of fig. 5 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction, in millimeters. As can be seen from fig. 5, in the present embodiment, the axial aberration is controlled within a small range, and the axial chromatic aberration of the optical lens 10 is well corrected.

Fig. 6 shows a chief ray incidence angle curve of the optical lens 10 according to the first embodiment. The abscissa thereof represents the Image Height (IH) in millimeters (mm); the ordinate thereof represents the principal ray incidence angle (CRA) in degrees (°). Fig. 6 is used to characterize the change in the profile of the chief ray angle at different image heights. As can be seen from the figure, in the first embodiment of the present application, the maximum chief ray incidence angle of the optical lens 10 reaches 38.4 °, and the optical lens 10 of the present embodiment can be adapted to a detector with a large chief ray incidence angle.

Fig. 7a is a temperature drift modulation contrast (MTF) curve at normal temperature (22 ℃) of the optical lens 10 of the first embodiment; FIG. 7b is a temperature drift modulation contrast curve of the optical lens 10 of the first embodiment at-30 ℃; fig. 7c is a temperature drift modulation contrast curve of the optical lens 10 of the first embodiment at +70 ℃. The abscissa is the spatial frequency, in units: lp/mm. The ordinate is the modulation contrast MTF. Each line in the graph represents the modulation contrast and spatial frequency relationship at different image height positions. As can be seen from fig. 7a, 7b, and 7c, the modulation contrast of the optical lens 10 is substantially the same at different temperatures, that is, the optical lens 10 of the present embodiment can clearly image under a wide temperature condition, that is, the temperature drift of the optical lens 10 is small in a large temperature variation range, so that the optical lens 10 of the present embodiment can have a good imaging effect at different temperatures.

Referring to fig. 8, fig. 8 is a schematic partial structure diagram of an optical lens 10 according to a second embodiment of the present application. In this embodiment, the optical lens 10 is a five-piece lens including five pieces of lenses, which are, in order from an object side to an image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15. The first lens 11 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is convex at the paraxial region; the second lens 12 is a positive power lens, and the object side surface and the image side surface of the second lens are convex surfaces at the paraxial positions; the third lens 13 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is concave at the paraxial region; a fourth lens 14, which is a positive power lens, and has a convex object-side surface and a convex image-side surface at paraxial positions; the fifth lens element 15 is an M-shaped lens element having at least one inflection point on both the object-side surface and the image-side surface, wherein the object-side surface is concave at the paraxial region and the image-side surface is concave at the paraxial region. The fourth lens 14 is a glass lens, and the other lenses (including the first lens 11, the second lens 12, the third lens 13, and the fifth lens 15) are all plastic lenses.

The design parameters of the second embodiment of the present application are as follows in table 4.

Table 4 basic parameters of the optical lens 10 of the second embodiment

Focal length EFFL	6.41mm
		F # value	2.0
FOV	94°
		IH	9.5mm
Total optical length TTL	11mm
		EFFL/TTL	0.583
EFFL/IH	0.675
		EFFL/(F#×TTL)	0.291
(IH×EFFL)/(F#×TTL2)	0.252
		f4/EFFL	0.73
\|v2-v3\|	35.6
		\|v4-v3\|	29.2
Design wavelength	650nm,610nm,555nm,510nm,470nm

In the above table, please refer to table 1 for the meaning of each symbol in the table.

In order to obtain the optical lens 10 having the optical basic parameters in table 4, parameters such as the curvature radius, thickness, refractive index, and abbe number of each lens and surface coefficients of the object-side surface and the image-side surface of each lens need to be able to be matched to obtain the optical lens 10 having the optical parameters in table 4. Referring to tables 5 and 6, table 5 shows parameters such as a curvature radius, a thickness, a refractive index, and an abbe number of each lens in the optical lens 10 according to the embodiment of the present application, and table 6 shows a surface coefficient of each lens in the optical lens 10 according to the embodiment of the present application.

Table 5 radius of curvature, thickness, refractive index, abbe number of each lens in the optical lens 10 according to the second embodiment

In the above table, please refer to table 2 for the meaning of each symbol in the table.

In the present embodiment, the object-side surface and the image-side surface of each lens are aspheric, and the surface coefficients thereof are aspheric coefficients. The surface coefficients of the respective lenses of the optical lens 10 in the present embodiment are shown in table 6.

Table 6 aspherical surface coefficients of optical lens 10 of the second embodiment

k

a4

a6

a8

a10

a12

a14

a16

a18

a20

R1

3.94E-02

5.30E-02

-1.73E-02

3.36E-03

-4.14E-04

3.34E-05

-1.74E-06

5.61E-08

-1.01E-09

7.72E-12

R2

-3.83E+01

6.12E-02

-2.19E-02

4.37E-03

-5.25E-04

4.19E-05

-2.34E-06

8.87E-08

-2.04E-09

2.10E-11

R3

-2.78E+00

3.14E-02

-1.76E-02

8.03E-03

-2.79E-03

6.91E-04

-1.10E-04

1.05E-05

-5.41E-07

1.17E-08

R4

5.00E+01

-8.26E-03

2.27E-03

-8.51E-04

3.64E-04

-9.87E-05

1.52E-05

-1.32E-06

5.91E-08

-1.08E-09

Stop

0.00E+00

R5

-2.88E+01

-1.10E-02

8.42E-03

-4.19E-03

1.90E-03

-6.61E-04

1.33E-04

-1.46E-05

8.17E-07

-1.82E-08

R6

1.91E+01

-2.11E-02

1.63E-02

-7.82E-03

3.50E-03

-1.20E-03

2.47E-04

-2.82E-05

1.65E-06

-3.88E-08

R7

-1.53E+01

-1.30E-02

7.80E-03

-3.79E-03

1.63E-03

-5.12E-04

9.60E-05

-1.01E-05

5.50E-07

-1.21E-08

R8

-8.15E-01

-4.34E-03

1.86E-04

-1.36E-05

-2.28E-06

5.55E-07

2.13E-09

-5.80E-09

3.24E-10

-1.18E-11

R9

5.00E+01

-7.65E-02

1.33E-02

-8.95E-04

-2.15E-04

8.77E-05

-1.50E-05

1.44E-06

-7.52E-08

1.65E-09

R10

-5.36E-01

-7.47E-02

1.93E-02

-4.26E-03

6.91E-04

-7.96E-05

6.24E-06

-3.15E-07

9.20E-09

-1.18E-10

In the above table, please refer to table 3 for the meaning of each symbol in the table.

in the present embodiment, it is preferred that,

wherein z is the rise of the aspheric surface, r is the radial coordinate of the aspheric surface, i.e. the distance from a point on the aspheric surface to the optical axis, c is the aspheric vertex spherical curvature, K is the conic constant, and a4, a6, a8, a10, a12, a14, a16, a18 and a20 are aspheric coefficients.

Fig. 9 to 11c are characteristic diagrams of the optical performance of the optical lens 10 of the second embodiment.

Specifically, fig. 9 is a schematic diagram of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens 10 according to the second embodiment. Which indicates the focal depth position on the image side of the optical lens 10 after light of different wavelengths passes through the optical lens 10. The ordinate of fig. 9 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction, in millimeters. As can be seen from fig. 9, in the present embodiment, the axial aberration is controlled within a small range, and the axial chromatic aberration of the optical lens 10 is well corrected.

Fig. 10 shows a chief ray incident angle curve of the optical lens 10 according to the second embodiment. The abscissa thereof represents the Image Height (IH) in millimeters (mm); the ordinate thereof represents the principal ray incidence angle (CRA) in degrees (°). Fig. 10 is used to characterize the change in the profile of the chief ray angle at different image heights. As can be seen from the figure, in the second embodiment of the present application, the maximum chief ray incidence angle of the optical lens 10 reaches 37.2 °, and the optical lens 10 of the present embodiment can be adapted to a detector with a large chief ray incidence angle.

FIG. 11a is a temperature drift modulation contrast curve at normal temperature (22 ℃) of the optical lens 10 according to the second embodiment; FIG. 11b is a temperature drift modulation contrast curve at-30 ℃ of the optical lens 10 of the second embodiment; fig. 11c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens 10 of the second embodiment. The abscissa is the spatial frequency, in units: lp/mm. The ordinate is the modulation contrast MTF. Each line in the graph represents the modulation contrast and spatial frequency relationship at different image height positions. As can be seen from fig. 11a, 11b, and 11c, the modulation contrast of the optical lens 10 is substantially the same at different temperatures, that is, the optical lens 10 of the present embodiment can clearly image under a wide temperature range, that is, the temperature drift of the optical lens 10 is small in a large temperature variation range, so that the optical lens 10 of the present embodiment can have a good imaging effect at different temperatures.

Referring to fig. 12, fig. 12 is a schematic partial structure diagram of an optical lens 10 according to a third embodiment of the present application. In this embodiment, the optical lens 10 is a five-piece lens including five pieces of lenses, which are, in order from an object side to an image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15. The first lens 11 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is concave at the paraxial region; the second lens 12 is a positive focal power lens, and the object side surface and the image side surface of the second lens are convex surfaces at paraxial positions; the third lens 13 is a negative power lens, and has a concave object-side surface at the paraxial region and a concave image-side surface at the paraxial region; a fourth lens 14, a positive power lens, wherein the object-side surface and the image-side surface are convex surfaces at paraxial positions; the fifth lens element 15 is an M-shaped lens element having at least one inflection point on both the object-side surface and the image-side surface, wherein the object-side surface is concave at the paraxial region and the image-side surface is concave at the paraxial region. The fourth lens 14 is a glass lens, and the other lenses (including the first lens 11, the second lens 12, the third lens 13, and the fifth lens 15) are all plastic lenses.

The design parameters of the third embodiment of the present application are as follows in table 7.

Table 7 basic parameters of the optical lens 10 of the third embodiment

In the above table, the meanings of the symbols in the table are as follows.

EFFL: the effective focal length of the optical lens 10.

FOV: the angle of view of the optical lens 10.

TTL: the total optical length of the optical lens 10, TTL, is the sum of the back focal length BFL of the optical lens 10 and the on-axis thickness TTL1 of the multi-piece lenses of the optical lens 10.

IH: the optical lens 10 has the maximum image height.

f₄: the focal length of the fourth lens 14.

v 2: abbe number of the second lens 12.

v 3: abbe number of the third lens 13.

v 4: abbe number of the fourth lens 14.

In the present application, TTL, EFFL, F #, FOV, IH, and F₄The notations v2, v3, v4 and the like have the same meanings, and are not described in detail again in the following.

From the above table, it can be seen that: the optical lens 10 provided in the present embodiment has an F # value of 2.0, an overall optical length TTL of 11.5mm, an IH of 9.5mm, and an FOV of 94 °, that is, the optical lens 10 of the present embodiment can simultaneously have characteristics of a large aperture, a large angle of view, a large image height (with high resolution), and a small optical length.

In order to obtain the optical lens 10 having the optical basic parameters in table 7, parameters such as the curvature radius, thickness, refractive index, and abbe number of each lens and surface coefficients of the object-side surface and the image-side surface of each lens need to be able to be matched to obtain the optical lens 10 having the optical parameters in table 7. Referring to tables 8 and 9, table 8 shows parameters such as a curvature radius, a thickness, a refractive index, and an abbe number of each lens in the optical lens 10 according to the embodiment of the present application, and table 9 shows a surface coefficient of each lens in the optical lens 10 according to the embodiment of the present application.

Table 8 radius of curvature, thickness, refractive index, and abbe number of each lens in the optical lens 10 according to the third embodiment

In the present embodiment, the object-side surface and the image-side surface of each lens are aspheric, and the surface coefficients thereof are aspheric coefficients. In the present embodiment, the surface coefficients of the respective lenses of the optical lens 10 are shown in table 9.

Table 9 aspherical surface coefficients of optical lens 10 of the third embodiment

k

a4

a6

a8

a10

a12

a14

a16

a18

a20

R1

1.11E+00

1.74E-02

-4.31E-03

6.70E-04

-6.97E-05

4.89E-06

-2.22E-07

6.12E-09

-9.27E-11

5.89E-13

R2

-1.06E+01

5.63E-03

1.95E-03

-1.33E-03

3.61E-04

-5.24E-05

4.38E-06

-2.12E-07

5.47E-09

-5.88E-11

R3

-4.24E+00

9.89E-04

2.32E-03

-3.51E-04

-1.77E-04

1.05E-04

-2.28E-05

2.51E-06

-1.39E-07

3.12E-09

R4

1.71E+01

-8.25E-03

3.30E-03

-9.24E-04

2.33E-04

-4.42E-05

5.53E-06

-4.18E-07

1.70E-08

-2.83E-10

Stop

0.00E+00

R5

4.17E+01

-3.38E-02

2.39E-02

-1.13E-02

4.20E-03

-1.22E-03

2.36E-04

-2.65E-05

1.57E-06

-3.79E-08

R6

2.06E+00

-4.32E-02

3.04E-02

-1.38E-02

5.05E-03

-1.47E-03

2.82E-04

-3.17E-05

1.88E-06

-4.53E-08

R7

-9.09E+00

-9.04E-03

5.62E-03

-2.03E-03

6.65E-04

-1.74E-04

2.80E-05

-2.52E-06

1.17E-07

-2.18E-09

R8

-1.74E+00

-3.15E-03

1.56E-04

-1.10E-05

-1.93E-06

5.39E-07

2.16E-09

-6.26E-09

4.38E-10

-1.53E-11

R9

-5.00E+01

-6.50E-02

1.20E-02

-1.14E-03

-1.14E-04

6.76E-05

-1.25E-05

1.25E-06

-6.71E-08

1.51E-09

R10

-4.94E-01

-6.54E-02

1.63E-02

-3.44E-03

5.34E-04

-5.89E-05

4.44E-06

-2.16E-07

6.09E-09

-7.58E-11

in the present embodiment, it is preferred that,

Fig. 13 to 15c are characteristic diagrams of the optical performance of the optical lens 10 of the third embodiment.

Specifically, fig. 13 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens 10 according to the third embodiment. Which indicates the focal depth position on the image side of the optical lens 10 after light of different wavelengths passes through the optical lens 10. The ordinate of fig. 13 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction in millimeters. As can be seen from fig. 13, in the present embodiment, the axial aberration is controlled within a small range, and the axial chromatic aberration of the optical lens 10 is well corrected.

Fig. 14 shows a chief ray incidence angle curve of the optical lens 10 according to the third embodiment. The abscissa thereof represents the Image Height (IH) in millimeters (mm); the ordinate thereof represents the principal ray incidence angle (CRA) in degrees (°). Fig. 14 is used to characterize the change in the profile of the chief ray angle at different image heights. As can be seen from the figure, in the third embodiment of the present application, the maximum chief ray incidence angle of the optical lens 10 reaches 38.2 °, and the optical lens 10 of the present embodiment can be adapted to a detector with a large chief ray incidence angle.

FIG. 15a is a temperature drift modulation contrast curve at normal temperature (22 ℃) of the optical lens 10 according to the third embodiment; FIG. 15b is a temperature drift modulation contrast curve of the optical lens 10 of the third embodiment at-30 ℃; fig. 15c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens 10 of the third embodiment. The abscissa is the spatial frequency, in units: lp/mm. The ordinate is the modulation contrast MTF. Each line in the graph represents the modulation contrast and spatial frequency relationship at different image height positions. As can be seen from fig. 15a, 15b, and 15c, the modulation contrast of the optical lens 10 is substantially the same at different temperatures, that is, the optical lens 10 of the present embodiment can clearly image under a wide temperature range, that is, the temperature drift of the optical lens 10 is small in a large temperature variation range, so that the optical lens 10 of the present embodiment can have a good imaging effect at different temperatures.

Referring to fig. 16, fig. 16 is a schematic partial structure diagram of an optical lens 10 according to a fourth embodiment of the present application. In this embodiment, the optical lens 10 is a five-piece lens including five pieces of lenses, which are, in order from an object side to an image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15. The first lens 11 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is convex at the paraxial region; the second lens 12 is a positive focal power lens, and the object side surface and the image side surface of the second lens are convex surfaces at paraxial positions; the third lens 13 is a negative power lens, and has a concave object-side surface at the paraxial region and a concave image-side surface at the paraxial region; a fourth lens 14, a positive power lens, wherein the object-side surface and the image-side surface are convex surfaces at paraxial positions; the fifth lens element 15 is an M-shaped lens element having at least one inflection point on both the object-side surface and the image-side surface, wherein the object-side surface is concave at the paraxial region and the image-side surface is concave at the paraxial region. The fourth lens 14 is a glass lens, and the other lenses (including the first lens 11, the second lens 12, the third lens 13, and the fifth lens 15) are all plastic lenses.

The design parameters of the fourth embodiment of the present application are as follows in table 10.

Table 10 basic parameters of the optical lens 10 of the fourth embodiment

In the above table, the meanings of the symbols in the table are as follows.

EFFL: the effective focal length of the optical lens 10.

FOV: the angle of view of the optical lens 10.

IH: the optical lens 10 has the maximum image height.

f 4: the focal length of the fourth lens 14.

v 2: abbe number of the second lens 12.

v 3: abbe number of the third lens 13.

v 4: abbe number of the fourth lens 14.

From the above table, it can be seen that: the optical lens 10 provided in the present embodiment has an F # value of 2.0, an overall optical length TTL of 13.1mm, an IH of 9.5mm, and a FOV of 119 °, that is, the optical lens 10 of the present embodiment can simultaneously have characteristics of a large aperture, a large viewing angle, a large image height (with high resolution), and a small optical length. In the present embodiment, the optical total length of the optical lens 10 is increased by a proper amount as compared with the first embodiment, so that the field angle of the optical lens 10 of the present embodiment is increased, and a larger field range can be obtained by imaging.

In order to obtain the optical lens 10 having the optical basic parameters in table 10, parameters such as the curvature radius, thickness, refractive index, and abbe number of each lens and surface coefficients of the object-side surface and the image-side surface of each lens need to be able to be matched to obtain the optical lens 10 having the optical parameters in table 10. Referring to tables 11 and 12, table 11 shows parameters such as a curvature radius, a thickness, a refractive index, and an abbe number of each lens in the optical lens 10 according to the embodiment of the present application, and table 12 shows a surface coefficient of each lens in the optical lens 10 according to the embodiment of the present application.

Table 11 radius of curvature, thickness, refractive index, abbe number of each lens in optical lens 10 according to the fourth embodiment

In the present embodiment, the object-side surface and the image-side surface of each lens are aspheric, and the surface coefficients thereof are aspheric coefficients. The surface coefficients of the respective lenses of the optical lens 10 in the present embodiment are shown in table 12.

Table 12 aspherical surface coefficients of optical lens 10 of the fourth embodiment

k

a4

a6

a8

a10

a12

a14

a16

a18

a20

R1

-4.95E-01

1.36E-02

-1.71E-03

1.89E-04

-1.71E-05

1.12E-06

-4.79E-08

1.19E-09

-1.32E-11

8.07E-15

R2

-2.16E+01

2.08E-02

-2.32E-03

1.90E-04

1.67E-05

-1.14E-05

2.23E-06

-2.31E-07

1.26E-08

-2.85E-10

R3

-2.79E+00

1.46E-02

-2.61E-03

8.50E-04

-2.72E-04

8.36E-05

-2.17E-05

3.93E-06

-4.17E-07

1.88E-08

R4

3.82E+00

2.86E-03

-1.20E-03

1.04E-03

-5.79E-04

2.04E-04

-4.50E-05

5.67E-06

-3.44E-07

7.05E-09

Stop

0.00E+00

R5

-1.55E+01

-1.83E-02

2.27E-02

-5.09E-02

7.88E-02

-7.69E-02

4.66E-02

-1.71E-02

3.47E-03

-3.00E-04

R6

1.41E+00

-3.06E-02

3.89E-02

-7.42E-02

1.10E-01

-1.05E-01

6.29E-02

-2.30E-02

4.70E-03

-4.12E-04

R7

-5.23E+00

-1.05E-02

2.28E-02

-4.16E-02

5.34E-02

-4.26E-02

2.09E-02

-6.12E-03

9.77E-04

-6.52E-05

R8

-1.89E+00

-2.73E-03

2.29E-04

-6.83E-06

-1.14E-06

5.18E-07

-1.24E-08

-6.57E-09

6.61E-10

-2.05E-11

R9

-4.24E+01

-6.17E-02

1.07E-02

-2.37E-03

6.93E-04

-1.55E-04

2.27E-05

-2.04E-06

1.03E-07

-2.24E-09

R10

-5.37E-01

-6.11E-02

1.39E-02

-2.95E-03

4.92E-04

-6.02E-05

5.09E-06

-2.78E-07

8.75E-09

-1.21E-10

in the present embodiment, it is preferred that,

wherein z is the rise of the aspheric surface, r is the radial coordinate of the aspheric surface, i.e. the distance from one point on the aspheric surface to the optical axis, c is the aspheric vertex spherical curvature, K is the conic constant, and a4, a6, a8, a10, a12, a14, a16, a18, a20 are aspheric coefficients.

Fig. 17 to 19c are characteristic diagrams of the optical performance of the optical lens 10 of the fourth embodiment.

Specifically, fig. 17 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens 10 according to the fourth embodiment. Which indicates the focal depth position on the image side of the optical lens 10 after light of different wavelengths passes through the optical lens 10. The ordinate of fig. 17 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction in millimeters. As can be seen from fig. 17, in the present embodiment, the axial aberration is controlled within a small range, and the axial chromatic aberration of the optical lens 10 is corrected well.

Fig. 18 shows a chief ray incidence angle curve of the optical lens 10 according to the fourth embodiment. The abscissa thereof represents the Image Height (IH) in millimeters (mm); the ordinate thereof represents the principal ray incidence angle (CRA) in degrees (°). Fig. 18 is used to characterize the change in the profile of the chief ray angle at different image heights. As can be seen from the figure, in the fourth embodiment of the present application, the maximum chief ray incidence angle of the optical lens 10 reaches 42.3 °, and the optical lens 10 of the present embodiment can be adapted to a detector with a large chief ray incidence angle.

FIG. 19a is a temperature drift modulation contrast curve at normal temperature (22 ℃) of the optical lens 10 according to the fourth embodiment; FIG. 19b is a temperature drift modulation contrast curve of the optical lens 10 of the fourth embodiment at-30 ℃; fig. 19c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens 10 of the fourth embodiment. The abscissa is the spatial frequency, in units: lp/mm. The ordinate is the modulation contrast MTF. Each line in the graph represents the modulation contrast and spatial frequency relationship at different image height positions. As can be seen from fig. 19a, 19b, and 19c, the modulation contrast of the optical lens 10 is substantially the same at different temperatures, that is, the optical lens 10 of the present embodiment can clearly image under a wide temperature range, that is, the temperature drift of the optical lens 10 is small in a large temperature variation range, so that the optical lens 10 of the present embodiment can have a good imaging effect at different temperatures.

Referring to fig. 20, fig. 20 is a schematic partial structure diagram of an optical lens 10 according to a fifth embodiment of the present application. In this embodiment, the optical lens 10 is a five-piece lens including five pieces of lenses, which are, in order from an object side to an image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15. The first lens 11 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is convex at the paraxial region; the second lens 12 is a positive power lens, and the object side surface and the image side surface of the second lens are convex surfaces at the paraxial positions; the third lens 13 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is concave at the paraxial region; a fourth lens 14, which is a positive power lens, and has a convex object-side surface and a convex image-side surface at paraxial positions; the fifth lens element 15 is an M-shaped lens element having at least one inflection point on both the object-side surface and the image-side surface, wherein the object-side surface is concave at the paraxial region and the image-side surface is concave at the paraxial region. The fourth lens 14 is a glass lens, and the other lenses (including the first lens 11, the second lens 12, the third lens 13, and the fifth lens 15) are all plastic lenses.

The design parameters of the fifth embodiment of the present application are as follows in table 13.

Table 13 basic parameters of the optical lens 10 of the fifth embodiment

From the above table, it can be seen that: the optical lens 10 provided in the present embodiment has an F # value of 2.0, an overall optical length TTL of 7.0mm, an IH of 4.6mm, and a FOV of 40 °, that is, the optical lens 10 of the present embodiment can simultaneously have characteristics of a large aperture, a large angle of view, a large image height (with high resolution), and a small optical length. The present embodiment is smaller in the total optical length of the optical lens 10 than the first embodiment, and can be applied to a more compact electronic device.

In order to obtain the optical lens 10 having the optical basic parameters in table 13, parameters such as the curvature radius, thickness, refractive index, and abbe number of each lens and surface coefficients of the object-side surface and the image-side surface of each lens need to be able to be matched to obtain the optical lens 10 having the optical parameters in table 13. Referring to tables 14 and 15, table 14 shows parameters such as a curvature radius, a thickness, a refractive index, and an abbe number of each lens in the optical lens 10 according to the embodiment of the present application, and table 15 shows a surface coefficient of each lens in the optical lens 10 according to the embodiment of the present application.

Table 14 radius of curvature, thickness, refractive index, and abbe number of each lens in the optical lens 10 according to the fifth embodiment

In the present embodiment, the object-side surface and the image-side surface of each lens are aspheric, and the surface coefficients thereof are aspheric coefficients. In the optical lens 10 of the present embodiment, the surface coefficients of the respective lenses are shown in table 15.

Table 15 aspherical surface coefficients of optical lens 10 of the fifth embodiment

k

a4

a6

a8

a10

a12

a14

a16

a18

a20

R1

1.16E+01

-2.55E-02

1.07E-02

-1.62E-03

1.28E-04

-5.73E-06

1.40E-07

-1.55E-09

-3.11E-14

9.94E-14

R2

-1.02E+01

-4.23E-03

5.90E-03

-8.81E-04

4.53E-06

1.10E-05

-1.24E-06

6.22E-08

-1.54E-09

1.52E-11

R3

-4.12E+00

1.69E-02

-1.25E-02

1.01E-02

-4.18E-03

8.87E-04

-1.04E-04

6.93E-06

-2.44E-07

3.55E-09

R4

3.05E+01

8.11E-02

-1.25E-01

8.94E-02

-3.81E-02

9.94E-03

-1.58E-03

1.49E-04

-7.61E-06

1.63E-07

Stop

0.00E+00

R5

5.00E+01

1.49E-01

-1.61E-01

9.69E-02

-4.03E-02

1.09E-02

-1.81E-03

1.81E-04

-9.92E-06

2.29E-07

R6

-2.16E+00

5.36E-02

-5.85E-02

2.96E-02

-1.44E-02

4.79E-03

-9.28E-04

1.02E-04

-5.90E-06

1.42E-07

R7

-3.70E+01

-1.23E-02

-9.77E-03

9.71E-03

-9.28E-03

3.93E-03

-8.27E-04

9.27E-05

-5.33E-06

1.24E-07

R8

1.85E+01

-3.08E-02

2.09E-03

-4.57E-04

-3.02E-04

-5.08E-05

2.65E-05

2.73E-05

9.42E-06

-6.71E-06

R9

-5.00E+01

-7.09E-02

4.33E-03

-4.52E-03

1.56E-03

-5.71E-05

-4.31E-05

7.54E-06

-4.95E-07

1.18E-08

R10

-4.44E+01

-9.82E-03

-1.46E-02

7.05E-03

-1.94E-03

3.28E-04

-3.20E-05

1.75E-06

-5.00E-08

5.83E-10

in the present embodiment, it is preferred that,

Fig. 21 to 23c are characteristic diagrams of the optical performance of the optical lens 10 of the fifth embodiment.

Specifically, fig. 21 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens 10 according to the fifth embodiment. Which indicates the focal depth position on the image side of the optical lens 10 after light of different wavelengths passes through the optical lens 10. The ordinate of fig. 21 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction in millimeters. As can be seen from fig. 21, in the present embodiment, the axial aberration is controlled within a small range, and the axial chromatic aberration of the optical lens 10 is corrected well.

Fig. 22 shows a principal ray incidence angle curve of the optical lens 10 according to the fifth embodiment. The abscissa thereof represents the Image Height (IH) in millimeters (mm); the ordinate thereof represents the principal ray incidence angle (CRA) in degrees (°). Fig. 22 is used to characterize the change in the profile of chief ray incidence angles at different image heights. As can be seen from the figure, in the fifth embodiment of the present application, the maximum chief ray incidence angle of the optical lens 10 reaches 27.8 °, and the optical lens 10 of the present embodiment can be adapted to a detector with a large chief ray incidence angle.

FIG. 23a is a temperature drift modulation contrast curve at normal temperature (22 ℃) of the optical lens 10 of the fifth embodiment; fig. 23b is a temperature drift modulation contrast curve of the optical lens 10 of the fifth embodiment at-30 ℃; fig. 23c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens 10 of the fifth embodiment. The abscissa is the spatial frequency, in units: lp/mm. The ordinate is the modulation contrast MTF. Each line in the graph represents the modulation contrast and spatial frequency relationship at different image height positions. As can be seen from fig. 23a, 23b, and 23c, the modulation contrast of the optical lens 10 is substantially the same at different temperatures, that is, the optical lens 10 of the present embodiment can clearly image under a wide temperature range, that is, the temperature drift of the optical lens 10 is small in a large temperature variation range, so that the optical lens 10 of the present embodiment can have a good imaging effect at different temperatures.

Referring to fig. 24, fig. 24 is a schematic partial structure diagram of an optical lens 10 according to a sixth embodiment of the present application. In this embodiment, the optical lens 10 is a five-piece lens including five pieces of lenses, which are, in order from an object side to an image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, and a fifth lens 15. The first lens 11 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is convex at the paraxial region; the second lens 12 is a positive focal power lens, and the object side surface and the image side surface of the second lens are convex surfaces at paraxial positions; the third lens 13 is a negative power lens, and has a concave object-side surface at the paraxial region and a concave image-side surface at the paraxial region; a fourth lens 14, a positive power lens, wherein the object-side surface and the image-side surface are convex surfaces at paraxial positions; the fifth lens element 15 is an M-shaped lens element having at least one inflection point on both the object-side surface and the image-side surface, wherein the object-side surface is concave at the paraxial region and the image-side surface is concave at the paraxial region. The second lens 12 is a glass lens, and the other lenses (including the first lens 11, the fourth lens 14, the third lens 13, and the fifth lens 15) are all plastic lenses.

The design parameters of the sixth embodiment of the present application are as follows in table 16.

Table 16 basic parameters of the optical lens 10 of the sixth embodiment

Focal length EFFL	5.82mm
		F # value	2.0
FOV	94°
		IH	9.5mm
Total optical length TTL	10.5mm
		EFFL/TTL	0.554
EFFL/IH	0.613
		EFFL/(F#×TTL)	0.277
(IH×EFFL)/(F#×TTL2)	0.279
		f4/EFFL	0.877
\|v2-v3\|	29.2
		\|v4-v3\|	36.5
Design wavelength	650nm,610nm,555nm,510nm,470nm

From the above table, it can be seen that: the optical lens 10 provided in the present embodiment has an F # value of 2.0, an overall optical length TTL of 10.5mm, an IH of 9.5mm, and an FOV of 94 °, that is, the optical lens 10 of the present embodiment can simultaneously have characteristics of a large aperture, a large angle of view, a large image height (with high resolution), and a small optical length.

In order to obtain the optical lens 10 having the optical basic parameters in table 16, parameters such as the curvature radius, thickness, refractive index, and abbe number of each lens and surface coefficients of the object-side surface and the image-side surface of each lens need to be able to be matched to obtain the optical lens 10 having the optical parameters in table 16. Referring to tables 17 and 18, table 17 shows parameters such as a curvature radius, a thickness, a refractive index, and an abbe number of each lens in the optical lens 10 according to the embodiment of the present application, and table 18 shows a surface coefficient of each lens in the optical lens 10 according to the embodiment of the present application.

Table 17 radius of curvature, thickness, refractive index, and abbe number of each lens in optical lens 10 according to the sixth embodiment

In the present embodiment, the object-side surface and the image-side surface of each lens are aspheric, and the surface coefficients thereof are aspheric coefficients. In the present embodiment, the surface coefficients of the respective lenses of the optical lens 10 are shown in table 18.

Table 18 aspherical surface coefficients of optical lens 10 according to sixth embodiment

in the present embodiment, it is preferred that,

Fig. 25 to 27c are characteristic diagrams of the optical performance of the optical lens 10 of the sixth embodiment.

Specifically, fig. 25 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens 10 according to the sixth embodiment. Which indicates the focal depth position on the image side of the optical lens 10 after light of different wavelengths passes through the optical lens 10. The ordinate of fig. 25 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction in millimeters. As can be seen from fig. 25, in the present embodiment, the axial aberration is controlled within a small range, and the axial chromatic aberration of the optical lens 10 is corrected well.

Fig. 26 shows a chief ray incidence angle curve of the optical lens 10 according to the sixth embodiment. The abscissa thereof represents the Image Height (IH) in millimeters (mm); the ordinate thereof represents the principal ray incidence angle (CRA) in degrees (°). Fig. 26 is used to characterize the change in the profile of chief ray incidence angles at different image heights. As can be seen from the figure, in the sixth embodiment of the present application, the maximum chief ray incidence angle of the optical lens 10 reaches 27.8 °, and the optical lens 10 of the present embodiment can be adapted to a detector with a large chief ray incidence angle.

FIG. 27a is a temperature drift modulation contrast curve at normal temperature (22 ℃) of the optical lens 10 according to the sixth embodiment; FIG. 27b is a temperature drift modulation contrast curve at-30 ℃ for the optical lens 10 of the sixth embodiment; fig. 27c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens 10 of the sixth embodiment. The abscissa is the spatial frequency, in units: lp/mm. The ordinate is the modulation contrast MTF. Each line in the graph represents the modulation contrast and spatial frequency relationship at different image height positions. As can be seen from fig. 27a, 27b, and 27c, the modulation contrast of the optical lens 10 is substantially the same at different temperatures, that is, the optical lens 10 of the present embodiment can clearly image under a wide temperature range, that is, the temperature drift of the optical lens 10 is small in a large temperature variation range, so that the optical lens 10 of the present embodiment can have a good imaging effect at different temperatures.

Referring to fig. 28, fig. 28 is a schematic partial structure diagram of an optical lens 10 according to a seventh embodiment of the present application. In this embodiment, the optical lens 10 is a six-lens including six lenses, which are, in order from an object side to an image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a complementary lens 16, and a fifth lens 15. The first lens 11 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is convex at the paraxial region; the second lens 12 is a positive focal power lens, and the object side surface and the image side surface of the second lens are convex surfaces at paraxial positions; the third lens 13 is a negative focal power lens, the object side surface of which is convex at the paraxial region and the image side surface of which is concave at the paraxial region; a fourth lens 14, a positive power lens, wherein the object-side surface and the image-side surface are convex surfaces at paraxial positions; the supplementary lens 16 is a negative focal power lens, and the object side surface and the image side surface of the supplementary lens are both concave surfaces at the paraxial position; the fifth lens element 15 is an M-shaped lens element having at least one inflection point on both the object-side surface and the image-side surface, wherein the object-side surface is convex at the paraxial region and the image-side surface is concave at the paraxial region. The fourth lens 14 is a glass lens, and the other lenses (including the first lens 11, the second lens 12, the third lens 13, the supplementary lens 16, and the fifth lens 15) are all plastic lenses.

The design parameters of the seventh embodiment of the present application are as follows in table 19.

Table 19 basic parameters of the optical lens 10 of the seventh embodiment

Focal length EFFL	5.62mm
		F # value	1.5
FOV	94°
		IH	9.5mm
Total optical length TTL	14mm
		EFFL/TTL	0.40
EFFL/IH	0.592
		EFFL/(F#×TTL)	0.267
(IH×EFFL)/(F#×TTL2)	0.182
		f4/EFFL	0.95
\|v2-v3\|	35.6
		\|v4-v3\|	29.2
\|v4-v5\|	29.2
		Design wavelength	650nm,610nm,555nm,510nm,470nm

In this application, v5 represents the abbe number of the fifth lens from the object side to the image side of the optical lens 10. In this embodiment, since the optical lens 10 is a six-piece lens and the fifth lens from the object side to the image side of the optical lens 10 is a complementary lens, v5 represents the abbe number of the complementary lens 16 in this embodiment. For the meanings of the other symbols in the table, refer to table 1.

From the above table, it can be seen that: the optical lens 10 provided in the present embodiment has an F # value of 1.5, an overall optical length TTL of 14mm, an IH of 9.5mm, and an FOV of 94 °, i.e., the optical lens 10 of the present embodiment can simultaneously have characteristics of a large aperture, a large angle of view, a large image height (with high resolution), and a small optical length.

In order to obtain the optical lens 10 having the optical basic parameters in table 19, parameters such as the curvature radius, thickness, refractive index, and abbe number of each lens and surface coefficients of the object-side surface and the image-side surface of each lens need to be able to be matched to obtain the optical lens 10 having the optical parameters in table 19. Referring to tables 20 and 21, table 20 shows parameters such as a curvature radius, a thickness, a refractive index, and an abbe number of each lens in the optical lens 10 according to the embodiment of the present application, and table 21 shows a surface coefficient of each lens in the optical lens 10 according to the embodiment of the present application.

Table 20 radius of curvature, thickness, refractive index, and abbe number of each lens in optical lens 10 according to the seventh embodiment

In this application, R9 denotes a radius of curvature at the paraxial region of the object side surface of the fifth lens from the object side to the image side of the optical lens 10; r10 represents a curvature radius of the image-side surface of the fifth lens from the object side to the image side of the optical lens 10. In this embodiment, since the optical lens 10 is a six-piece lens and the fifth lens from the object side to the image side of the optical lens 10 is a complementary lens, in this embodiment, R9 represents the curvature radius at the paraxial region of the object side surface of the complementary lens 16, and R10 represents the curvature radius at the paraxial region of the image side surface of the complementary lens 16. R11 represents a radius of curvature at the paraxial region of the object side surface of the sixth lens from the object side to the image side of the optical lens 10; r12 represents a curvature radius at the paraxial region of the image-side surface of the sixth lens from the object side to the image side of the optical lens 10. In this embodiment, since the sixth lens element from the object side to the image side of the optical lens 10 is the fifth lens element 15, in this embodiment, R11 represents a curvature radius of the object side surface of the fifth lens element 15 at the paraxial region, and R12 represents a curvature radius of the image side surface of the fifth lens element 15 at the paraxial region.

In the present application, d5 represents the on-axis thickness of the fifth lens from the object side to the image side of the optical lens 10. In this embodiment, since the optical lens 10 is a six-piece lens and the fifth lens from the object side to the image side of the optical lens 10 is a complementary lens, d5 represents the on-axis thickness of the complementary lens 16 in this embodiment. In the present application, d65 represents the on-axis thickness of the sixth lens from the object side to the image side of the optical lens 10. In this embodiment, since the optical lens 10 is a six-piece lens and the sixth lens from the object side to the image side of the optical lens 10 is the fifth lens 15, d6 represents the on-axis thickness of the fifth lens 15 in this embodiment.

In the present application, a5 represents an on-axis distance from an image side surface of the fifth lens to an object side surface of a lens adjacent to the image side surface of the fifth lens or an object side surface of the infrared filter 30 in the optical lens 10 from the object side to the image side. In this embodiment, since the optical lens 10 is a six-piece lens, the fifth lens from the object side to the image side of the optical lens 10 is the complementary lens 16, and the image side surface of the complementary lens 16 is adjacent to the fifth lens 15, in this embodiment, a5 represents the on-axis distance between the image side surface of the on-axis lens and the object side surface of the fifth lens 15. a6 represents the on-axis distance from the image side surface of the sixth lens to the image side surface of the lens adjacent to the image side surface of the sixth lens or the object side surface of the infrared filter 30 in the optical lens 10. In this embodiment, since the optical lens 10 is a six-piece lens, the sixth lens from the object side to the image side of the optical lens 10 is the fifth lens 15, and the image side surface of the fifth lens 15 is adjacent to the infrared filter 30, in this embodiment, a6 represents the on-axis distance between the image side surface of the fifth lens 15 and the object side surface of the infrared filter 30.

n5 represents the refractive index of the fifth lens from the object side to the image side of the optical lens 10. In this embodiment, if the fifth lens element from the object side to the image side of the optical lens 10 is the complementary lens element 16, n6 represents the refractive index of the complementary lens element 16 in this embodiment; n6 represents the refractive index of the sixth lens element from the object side to the image side of the optical lens 10. In this embodiment, if the sixth lens element from the object side to the image side of the optical lens 10 is the complementary lens element 16, n6 represents the refractive index of the fifth lens element 15 in this embodiment.

v5 denotes the abbe number of the fifth lens from the object side to the image side of the optical lens 10. In this embodiment, when the fifth lens from the object side to the image side of the optical lens 10 is the complementary lens 16, v5 represents the abbe number of the complementary lens 16. v6 denotes the abbe number of the sixth lens from the object side to the image side of the optical lens 10. In this embodiment, when the sixth lens from the object side to the image side of the optical lens 10 is the complementary lens 16, v6 represents the abbe number of the fifth lens 15 in this embodiment.

It should be noted that, in the above table, except for R9, R10, R11, R12, d5, d6, a5, a6, n5, n6, v5, and v6, the meanings of the symbols are the same as those in table 2, and for the specific meanings of the symbols, reference is made to table 2, which is not repeated herein.

In the present embodiment, the object-side surface and the image-side surface of each lens are aspheric, and the surface coefficients thereof are aspheric coefficients. In the present embodiment, the surface coefficients of the respective lenses of the optical lens 10 are shown in table 21.

Table 21 aspherical surface coefficients of optical lens 10 according to the seventh embodiment

k

a4

a6

a8

a10

a12

a14

a16

a18

a20

R1

-3.12E-01

1.50E-02

-1.83E-03

1.87E-04

-1.47E-05

8.33E-07

-3.27E-08

8.27E-10

-1.20E-11

7.57E-14

R2

-5.00E+01

1.65E-02

-1.39E-03

2.59E-05

1.68E-05

-3.13E-06

2.85E-07

-1.48E-08

4.24E-10

-5.14E-12

R3

-4.40E+00

8.63E-03

-9.13E-04

2.19E-04

-7.01E-05

1.81E-05

-3.08E-06

3.15E-07

-1.75E-08

3.99E-10

R4

3.74E+00

6.14E-03

-2.38E-03

1.08E-03

-3.60E-04

7.95E-05

-1.13E-05

9.83E-07

-4.81E-08

1.01E-09

Stop

0.00E+00

R5

-1.47E+00

-9.52E-03

-1.29E-03

1.40E-03

-6.20E-04

1.65E-04

-2.65E-05

2.55E-06

-1.34E-07

2.94E-09

R6

3.00E-01

-1.77E-02

9.67E-04

8.02E-04

-5.47E-04

1.83E-04

-3.45E-05

3.73E-06

-2.14E-07

4.97E-09

R7

-4.34E+00

7.45E-05

-4.75E-04

3.18E-04

-2.38E-04

1.02E-04

-2.69E-05

4.33E-06

-3.85E-07

1.45E-08

R8

8.41E+00

-2.16E-03

-2.05E-04

3.86E-05

5.75E-06

2.68E-07

-4.46E-08

-1.08E-08

-1.10E-09

2.31E-10

R9

5.00E+01

-4.34E-03

1.34E-04

-8.50E-06

8.08E-06

1.63E-06

1.62E-07

-5.39E-08

-1.02E-08

1.41E-09

R10

-4.98E+01

9.83E-04

4.56E-04

2.62E-04

-2.50E-04

1.01E-04

-2.29E-05

3.02E-06

-2.13E-07

6.16E-09

R11

-2.84E+00

-2.51E-02

-5.08E-04

1.69E-03

-7.65E-04

1.96E-04

-3.03E-05

2.80E-06

-1.39E-07

2.84E-09

R12

-2.78E-01

-2.62E-02

1.94E-03

1.93E-04

-1.13E-04

2.03E-05

-2.05E-06

1.21E-07

-3.94E-09

5.46E-11

In the above table, R9 denotes the radius of curvature at the paraxial region of the object-side surface of the supplementary lens 16, and R10 denotes the radius of curvature at the paraxial region of the image-side surface of the supplementary lens 16; r11 denotes the radius of curvature at the paraxial region of the object-side surface of the fifth lens 15, and R12 denotes the radius of curvature at the paraxial region of the image-side surface of the fifth lens 15; for the meanings of the symbols in the table except for R9, R10, R11 and R12, refer to Table 3.

in the present embodiment, it is preferred that,

Fig. 29 to 31c are characteristic diagrams of the optical performance of the optical lens 10 of the seventh embodiment.

Specifically, fig. 29 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens 10 according to the seventh embodiment. Which indicates the focal depth position on the image side of the optical lens 10 after light of different wavelengths passes through the optical lens 10. The ordinate of fig. 29 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction in millimeters. As can be seen from fig. 29, in the present embodiment, the axial aberration is controlled within a small range, and the axial chromatic aberration of the optical lens 10 is corrected well.

Fig. 30 shows a principal ray incidence angle curve of the optical lens 10 according to the seventh embodiment. The abscissa thereof represents the Image Height (IH) in millimeters (mm); the ordinate thereof represents the principal ray incidence angle (CRA) in degrees (°). Fig. 30 is used to characterize the change in the profile of chief ray incidence angles at different image heights. As can be seen from the figure, in the seventh embodiment of the present application, the maximum chief ray incidence angle of the optical lens 10 reaches 37.9 °, and the optical lens 10 of the present embodiment can be adapted to a detector with a large chief ray incidence angle.

FIG. 31a is a temperature drift modulation contrast curve at normal temperature (22 ℃) of the optical lens 10 according to the seventh embodiment; FIG. 31b is a temperature drift modulation contrast curve at-30 ℃ of the optical lens 10 of the seventh embodiment; fig. 31c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens 10 of the seventh embodiment. The abscissa is the spatial frequency, in units: lp/mm. The ordinate is the modulation contrast MTF. Each line in the graph represents the modulation contrast and spatial frequency relationship at different image height positions. As can be seen from fig. 31a, 31b, and 31c, the modulation contrast of the optical lens 10 is substantially the same at different temperatures, that is, the optical lens 10 of the present embodiment can clearly image under a wide temperature range, that is, the temperature drift of the optical lens 10 is small in a large temperature variation range, so that the optical lens 10 of the present embodiment can have a good imaging effect at different temperatures.

Referring to fig. 32, fig. 32 is a schematic partial structure diagram of an optical lens 10 according to an eighth embodiment of the present application. In this embodiment, the optical lens 10 is a six-lens including six lenses, which are, in order from an object side to an image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a complementary lens 16, and a fifth lens 15. The first lens 11 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is convex at the paraxial region; the second lens 12 is a positive focal power lens, and the object side surface and the image side surface of the second lens are convex surfaces at paraxial positions; the third lens 13 is a negative focal power lens, the object side surface of which is convex at the paraxial region and the image side surface of which is concave at the paraxial region; a fourth lens 14, a positive power lens, wherein the object-side surface and the image-side surface are convex surfaces at paraxial positions; the supplementary lens 16 is a negative focal power lens, and the object side surface and the image side surface of the supplementary lens are both concave surfaces at the paraxial position; the fifth lens element 15 is an M-shaped lens element having at least one inflection point on both the object-side surface and the image-side surface, wherein the object-side surface is convex at the paraxial region and the image-side surface is convex at the paraxial region. The fourth lens 14 is a glass lens, and the other lenses (including the first lens 11, the second lens 12, the third lens 13, the supplementary lens 16, and the fifth lens 15) are all plastic lenses.

The design parameters of the eighth embodiment of the present application are as follows in table 22.

Table 22 basic parameters of the optical lens 10 of the eighth embodiment

Focal length EFFL	5.62mm
		F # value	1.5
FOV	94°
		IH	9.5mm
Total optical length TTL	14mm
		EFFL/TTL	0.40
EFFL/IH	0.595
		EFFL/(F#×TTL)	0.269
(IH×EFFL)/(F#×TTL2)	0.183
		f4/EFFL	0.98
\|v2-v3\|	35.6
		\|v4-v3\|	29.2
\|v4-v5\|	29.2
		Design wavelength	650nm,610nm,555nm,510nm,470nm

In the above table, the meaning of each symbol in the table is referred to table 19.

In order to obtain the optical lens 10 having the optical basic parameters in table 22, parameters such as the curvature radius, thickness, refractive index, and abbe number of each lens and surface coefficients of the object-side surface and the image-side surface of each lens need to be able to be matched to obtain the optical lens 10 having the optical parameters in table 22. Referring to tables 23 and 24, table 23 shows parameters such as a curvature radius, a thickness, a refractive index, and an abbe number of each lens in the optical lens 10 according to the embodiment of the present application, and table 24 shows a surface coefficient of each lens in the optical lens 10 according to the embodiment of the present application.

Table 23 radius of curvature, thickness, refractive index, and abbe number of each lens in optical lens 10 according to the eighth embodiment

In the above table, the meaning of each symbol in the table is referred to table 20.

In the present embodiment, the object-side surface and the image-side surface of each lens are aspheric, and the surface coefficients thereof are aspheric coefficients. The surface coefficients of the respective lenses of the optical lens 10 in the present embodiment are shown in table 24.

Table 24 aspherical surface coefficients of optical lens 10 according to the eighth embodiment

k

a4

a6

a8

a10

a12

a14

a16

a18

a20

R1

-3.43E-01

1.39E-02

-1.54E-03

1.54E-04

-1.25E-05

7.63E-07

-3.26E-08

9.06E-10

-1.45E-11

1.00E-13

R2

-3.69E+01

1.53E-02

-1.18E-03

5.82E-05

3.17E-06

-1.05E-06

1.11E-07

-6.82E-09

2.41E-10

-3.64E-12

R3

-3.38E+00

8.04E-03

-7.02E-04

9.99E-05

-8.55E-06

-8.86E-07

4.18E-07

-6.16E-08

4.28E-09

-1.20E-10

R4

2.73E+00

7.03E-03

-2.81E-03

1.01E-03

-2.75E-04

5.30E-05

-6.89E-06

5.67E-07

-2.65E-08

5.32E-10

Stop

0.00E+00

R5

-1.82E+00

-1.50E-02

9.24E-04

1.04E-04

-3.82E-05

1.05E-05

-1.63E-06

1.20E-07

-2.79E-09

-5.16E-11

R6

4.37E-01

-2.41E-02

4.37E-03

-1.29E-03

4.36E-04

-1.05E-04

1.72E-05

-1.80E-06

1.05E-07

-2.64E-09

R7

-4.04E+00

5.06E-04

-5.97E-04

3.71E-04

-2.56E-04

1.05E-04

-2.59E-05

3.83E-06

-3.07E-07

1.01E-08

R8

7.90E+00

-3.01E-03

-1.79E-04

4.43E-05

4.90E-06

3.91E-08

-6.24E-08

-9.39E-09

-5.61E-10

2.69E-10

R9

-4.74E+01

-6.42E-03

9.90E-05

-2.70E-06

1.33E-05

1.94E-06

7.41E-08

-7.39E-08

-1.07E-08

1.87E-09

R10

-1.86E+01

6.44E-03

-1.22E-03

3.89E-04

-1.23E-04

3.95E-05

-8.21E-06

1.06E-06

-7.68E-08

2.34E-09

R11

-6.23E+00

-2.72E-02

5.93E-04

1.16E-03

-5.79E-04

1.54E-04

-2.42E-05

2.24E-06

-1.10E-07

2.14E-09

R12

-1.83E-01

-2.85E-02

3.07E-03

-1.71E-04

-3.65E-05

9.97E-06

-1.16E-06

7.46E-08

-2.60E-09

3.86E-11

In the above table, the meanings of the symbols in the table are referred to in table 21.

in the present embodiment, it is preferred that,

Fig. 33 to 35c are characteristic diagrams of the optical performance of the optical lens 10 of the eighth embodiment.

Specifically, fig. 33 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens 10 according to the eighth embodiment. Which indicates the focal depth position on the image side of the optical lens 10 after light of different wavelengths passes through the optical lens 10. The ordinate of fig. 33 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction in millimeters. As can be seen from fig. 33, in the present embodiment, the axial aberration is controlled within a small range, and the axial chromatic aberration of the optical lens 10 is corrected well.

Fig. 34 shows a principal ray incidence angle curve of the optical lens 10 according to the eighth embodiment. The abscissa thereof represents the Image Height (IH) in millimeters (mm); the ordinate thereof represents the principal ray incidence angle (CRA) in degrees (°). Fig. 34 is used to characterize the change in the profile of chief ray incidence angles at different image heights. As can be seen from the figure, in the eighth embodiment of the present application, the maximum chief ray incidence angle of the optical lens 10 reaches 38.8 °, and the optical lens 10 of the present embodiment can be adapted to a detector with a large chief ray incidence angle.

FIG. 35a is a temperature drift modulation contrast curve at normal temperature (22 ℃) of the optical lens 10 according to the eighth embodiment; FIG. 35b is a temperature drift modulation contrast curve at-30 ℃ of the optical lens 10 of the eighth embodiment; fig. 35c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens 10 of the eighth embodiment. The abscissa is the spatial frequency, in units: lp/mm. The ordinate is the modulation contrast MTF. Each line in the graph represents the modulation contrast and spatial frequency relationship at different image height positions. As can be seen from fig. 35a, 35b, and 35c, the modulation contrast of the optical lens 10 is substantially the same at different temperatures, that is, the optical lens 10 of the present embodiment can clearly image under a wide temperature range, that is, the temperature drift of the optical lens 10 is small in a large temperature variation range, so that the optical lens 10 of the present embodiment can have a good imaging effect at different temperatures.

Referring to fig. 36, fig. 36 is a schematic partial structure diagram of an optical lens 10 according to a ninth embodiment of the present application. In this embodiment, the optical lens 10 is a six-lens including six lenses, which are, in order from an object side to an image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a complementary lens 16, and a fifth lens 15. The first lens 11 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is convex at the paraxial region; the second lens 12 is a positive focal power lens, and the object side surface and the image side surface of the second lens are convex surfaces at paraxial positions; the third lens 13 is a negative focal power lens, the object side surface of which is convex at the paraxial region and the image side surface of which is concave at the paraxial region; a fourth lens 14, a positive power lens, wherein the object-side surface and the image-side surface are convex surfaces at paraxial positions; the supplementary lens 16 is a negative focal power lens, and the object side surface and the image side surface of the supplementary lens are both concave surfaces at the paraxial position; the fifth lens element 15 is an M-shaped lens element having at least one inflection point on both the object-side surface and the image-side surface, wherein the object-side surface is convex at the paraxial region and the image-side surface is convex at the paraxial region. The fourth lens 14 is a glass lens, and the other lenses (including the first lens 11, the second lens 12, the third lens 13, the supplementary lens 16, and the fifth lens 15) are all plastic lenses.

The design parameters of the ninth embodiment of the present application are as follows in table 25.

Table 25 basic parameters of the optical lens 10 of the ninth embodiment

Focal length EFFL	5.67mm
		F # value	1.5
FOV	94°
		IH	9.5mm
Total optical length TTL	14mm
		EFFL/TTL	0.41
EFFL/IH	0.597
		EFFL/(F#×TTL)	0.270
(IH×EFFL)/(F#×TTL2)	0.183
		f4/EFFL	0.94
\|v2-v3\|	35.6
		\|v4-v3\|	29.2
\|v4-v5\|	29.2
		Design wavelength	650nm,610nm,555nm,510nm,470nm

In order to obtain the optical lens 10 having the optical basic parameters in table 25, parameters such as the curvature radius, thickness, refractive index, and abbe number of each lens and surface coefficients of the object-side surface and the image-side surface of each lens need to be able to be matched to obtain the optical lens 10 having the optical parameters in table 25. Referring to tables 26 and 27, table 26 shows parameters such as a curvature radius, a thickness, a refractive index, and an abbe number of each lens in the optical lens 10 according to the embodiment of the present application, and table 27 shows a surface coefficient of each lens in the optical lens 10 according to the embodiment of the present application.

Table 26 radius of curvature, thickness, refractive index, and abbe number of each lens in the optical lens 10 according to the ninth embodiment

In the present embodiment, the object-side surface and the image-side surface of each lens are aspheric, and the surface coefficients thereof are aspheric coefficients. In the optical lens 10 of the present embodiment, the surface coefficients of the respective lenses are shown in table 27.

Table 27 aspherical surface coefficients of optical lens 10 according to ninth embodiment

k

a4

a6

a8

a10

a12

a14

a16

a18

a20

R1

-3.80E-01

1.50E-02

-1.67E-03

1.66E-04

-1.35E-05

8.38E-07

-3.64E-08

1.03E-09

-1.67E-11

1.17E-13

R2

-4.18E+01

1.64E-02

-1.15E-03

1.35E-05

1.23E-05

-2.36E-06

2.37E-07

-1.39E-08

4.51E-10

-6.16E-12

R3

-3.30E+00

1.02E-02

-8.83E-04

-9.11E-05

1.21E-04

-4.16E-05

7.95E-06

-8.90E-07

5.44E-08

-1.41E-09

R4

1.99E+00

4.52E-03

-3.20E-04

1.18E-04

-7.79E-05

2.65E-05

-5.15E-06

5.78E-07

-3.49E-08

8.73E-10

Stop

0.00E+00

R5

-2.40E+00

-2.05E-02

3.19E-03

1.36E-04

-3.10E-04

1.05E-04

-1.85E-05

1.87E-06

-1.04E-07

2.46E-09

R6

4.94E-01

-2.78E-02

3.58E-03

1.04E-03

-1.03E-03

3.97E-04

-8.77E-05

1.15E-05

-8.28E-07

2.49E-08

R7

-3.55E+00

-5.95E-04

2.59E-04

-2.77E-04

1.19E-04

-3.11E-05

4.47E-06

-2.82E-07

1.92E-09

3.27E-10

R8

8.79E+00

-1.63E-03

-2.99E-04

5.26E-05

8.66E-06

6.32E-07

-4.21E-08

-2.27E-08

-3.03E-09

8.70E-10

R9

-1.86E+01

-6.64E-03

3.87E-04

-9.04E-06

9.59E-06

1.44E-06

6.95E-08

-5.67E-08

-7.15E-09

1.32E-09

R10

-5.00E+01

2.28E-03

-2.42E-05

4.00E-04

-2.39E-04

8.01E-05

-1.59E-05

1.88E-06

-1.19E-07

3.11E-09

R11

-4.29E+01

-3.54E-02

2.60E-03

2.76E-04

-1.91E-04

4.55E-05

-6.18E-06

4.80E-07

-1.68E-08

9.16E-11

R12

-4.05E-01

-4.19E-02

6.53E-03

-8.96E-04

7.86E-05

-3.38E-06

-9.17E-08

2.00E-08

-9.79E-10

1.70E-11

in the present embodiment, it is preferred that,

Fig. 37 to 39c are characteristic diagrams of the optical performance of the optical lens 10 of the ninth embodiment.

Specifically, fig. 37 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens 10 according to the ninth embodiment. Which indicates the focal depth position on the image side of the optical lens 10 after light of different wavelengths passes through the optical lens 10. The ordinate of fig. 37 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction in millimeters. As can be seen from fig. 37, in the present embodiment, the axial aberration is controlled within a small range, and the axial chromatic aberration of the optical lens 10 is corrected well.

Fig. 38 shows a chief ray incidence angle curve of the optical lens 10 according to the ninth embodiment. The abscissa thereof represents the Image Height (IH) in millimeters (mm); the ordinate thereof represents the principal ray incidence angle (CRA) in degrees (°). Fig. 38 is used to characterize the change in the profile of chief ray incidence angles at different image heights. As can be seen from the figure, in the ninth embodiment of the present application, the maximum chief ray incidence angle of the optical lens 10 reaches 42.5 °, and the optical lens 10 of the present embodiment can be adapted to a detector with a large chief ray incidence angle.

FIG. 39a is a temperature drift modulation contrast curve at normal temperature (22 ℃) of the optical lens 10 according to the ninth embodiment; FIG. 39b is a temperature drift modulation contrast curve of the optical lens 10 of the ninth embodiment at-30 ℃; fig. 39c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens 10 of the ninth embodiment. The abscissa is the spatial frequency, in units: lp/mm. The ordinate is the modulation contrast MTF. Each line in the graph represents the modulation contrast and spatial frequency relationship at different image height positions. As can be seen from fig. 39a, 39b, and 39c, the modulation contrast of the optical lens 10 is substantially the same at different temperatures, that is, the optical lens 10 of the present embodiment can clearly image under a wide temperature range, that is, the temperature drift of the optical lens 10 is small in a large temperature variation range, so that the optical lens 10 of the present embodiment can have a good imaging effect at different temperatures.

Referring to fig. 40, fig. 40 is a schematic partial structure diagram of an optical lens 10 according to a tenth embodiment of the present application. In this embodiment, the optical lens 10 is a six-lens including six lenses, which are, in order from an object side to an image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a complementary lens 16, and a fifth lens 15. The first lens 11 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is concave at the paraxial region; the second lens 12 is a positive focal power lens, and the object side surface and the image side surface of the second lens are convex surfaces at paraxial positions; the third lens 13 is a negative focal power lens, the object side surface of which is convex at the paraxial region and the image side surface of which is concave at the paraxial region; a fourth lens 14, a positive power lens, wherein the object-side surface and the image-side surface are convex surfaces at paraxial positions; the supplementary lens 16 is a negative focal power lens, and the object side surface and the image side surface of the supplementary lens are both concave surfaces at the paraxial position; the fifth lens element 15 is an M-shaped lens element having at least one inflection point on both the object-side surface and the image-side surface, wherein the object-side surface is convex at the paraxial region and the image-side surface is convex at the paraxial region. The fourth lens 14 is a glass lens, and the other lenses (including the first lens 11, the second lens 12, the third lens 13, the supplementary lens 16, and the fifth lens 15) are all plastic lenses.

The design parameters of the tenth embodiment of the present application are as follows in table 28.

Table 28 basic parameters of the optical lens 10 of the tenth embodiment

Focal length EFFL	5.77mm
		F # value	1.5
FOV	94°
		IH	9.5mm
Total optical length TTL	14mm
		EFFL/TTL	0.41
EFFL/IH	0.607
		EFFL/(F#×TTL)	0.275
(IH×EFFL)/(F#×TTL2)	0.186
		f4/EFFL	0.97
\|v2-v3\|	35.6
		\|v4-v3\|	29.2
\|v4-v5\|	29.2
		Design wavelength	650nm,610nm,555nm,510nm,470nm

In order to obtain the optical lens 10 having the optical basic parameters in table 28, parameters such as the curvature radius, thickness, refractive index, and abbe number of each lens and surface coefficients of the object-side surface and the image-side surface of each lens need to be able to be matched to obtain the optical lens 10 having the optical parameters in table 28. Referring to tables 29 and 30, table 29 shows parameters such as the radius of curvature, the thickness, the refractive index, and the abbe number of each lens in the optical lens 10 according to the embodiment of the present application, and table 30 shows the surface coefficient of each lens in the optical lens 10 according to the embodiment of the present application.

Table 29 radius of curvature, thickness, refractive index, and abbe number of each lens in the optical lens 10 according to the tenth embodiment

In the present embodiment, the object-side surface and the image-side surface of each lens are aspheric, and the surface coefficients thereof are aspheric coefficients. In the present embodiment, the surface coefficients of the respective lenses of the optical lens 10 are shown in table 30.

Table 30 aspherical surface coefficients of optical lens 10 according to the tenth embodiment

k

a4

a6

a8

a10

a12

a14

a16

a18

a20

R1

-1.31E-01

7.69E-03

-7.86E-04

8.28E-05

-7.17E-06

4.50E-07

-1.89E-08

5.01E-10

-7.47E-12

4.72E-14

R2

-3.97E-01

4.14E-03

-2.49E-04

1.27E-05

2.47E-06

-7.23E-07

7.42E-08

-3.79E-09

9.67E-11

-9.86E-13

R3

-3.99E+00

7.47E-03

-5.08E-04

-3.20E-05

4.01E-05

-1.16E-05

1.84E-06

-1.74E-07

9.09E-09

-2.02E-10

R4

2.92E+00

4.79E-03

-1.24E-03

3.37E-04

-7.60E-05

1.27E-05

-1.48E-06

1.13E-07

-5.09E-09

1.00E-10

Stop

0.00E+00

R5

-2.09E+00

-1.47E-02

5.20E-04

1.11E-04

-2.99E-05

9.57E-06

-1.45E-06

1.05E-07

-3.54E-09

3.59E-11

R6

4.70E-01

-2.26E-02

2.11E-03

-8.92E-05

-7.26E-05

5.26E-05

-1.52E-05

2.41E-06

-1.99E-07

6.54E-09

R7

-2.53E+00

1.70E-04

-2.16E-04

2.10E-05

-2.06E-06

-5.17E-07

4.04E-07

-6.64E-08

4.19E-09

-9.16E-11

R8

7.94E+00

-2.17E-03

-2.44E-04

4.99E-05

6.45E-06

1.75E-07

-6.31E-08

-9.72E-09

-4.45E-10

1.78E-10

R9

5.00E+01

-6.53E-03

1.88E-04

-1.40E-05

8.47E-06

1.44E-06

1.29E-07

-5.04E-08

-9.37E-09

1.35E-09

R10

-2.48E+01

-2.03E-04

4.21E-04

2.39E-04

-1.94E-04

7.14E-05

-1.48E-05

1.77E-06

-1.14E-07

2.96E-09

R11

-2.84E+00

-2.22E-02

1.43E-03

1.56E-04

-1.35E-04

3.70E-05

-5.58E-06

4.82E-07

-2.14E-08

3.65E-10

R12

-2.38E-01

-2.43E-02

2.54E-03

-2.01E-04

-6.47E-06

3.81E-06

-4.73E-07

3.04E-08

-1.03E-09

1.46E-11

in the present embodiment, it is preferred that,

Fig. 41 to 43c are characteristic diagrams of the optical performance of the optical lens 10 of the tenth embodiment.

Specifically, fig. 41 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens 10 according to the tenth embodiment. Which indicates the focal depth position on the image side of the optical lens 10 after light of different wavelengths passes through the optical lens 10. The ordinate of fig. 41 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction in millimeters. As can be seen from fig. 41, in the present embodiment, the axial aberration is controlled within a small range, and the axial chromatic aberration of the optical lens 10 is corrected well.

Fig. 42 shows a chief ray incidence angle curve of the optical lens 10 according to the tenth embodiment. The abscissa thereof represents the Image Height (IH) in millimeters (mm); the ordinate thereof represents the principal ray incidence angle (CRA) in degrees (°). Fig. 42 is a graph representing the variation of the chief ray incident angle at different image heights. As can be seen from the figure, in the tenth embodiment of the present application, the maximum chief ray incidence angle of the optical lens 10 reaches 40.6 °, and the optical lens 10 of the present embodiment can be adapted to a detector with a large chief ray incidence angle.

FIG. 43a is a temperature drift modulation contrast curve at normal temperature (22 ℃) of the optical lens 10 according to the tenth embodiment; FIG. 43b is a temperature drift modulation contrast curve at-30 ℃ of the optical lens 10 according to the tenth embodiment; fig. 43c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens 10 of the tenth embodiment. The abscissa is the spatial frequency, in units: lp/mm. The ordinate is the modulation contrast MTF. Each line in the graph represents the modulation contrast and spatial frequency relationship at different image height positions. As can be seen from fig. 43a, 43b, and 43c, the modulation contrast of the optical lens 10 is substantially the same at different temperatures, that is, the optical lens 10 of the present embodiment can clearly image under a wide temperature range, that is, the temperature drift of the optical lens 10 is small in a large temperature variation range, so that the optical lens 10 of the present embodiment can have a good imaging effect at different temperatures.

Referring to fig. 44, fig. 44 is a schematic partial structure diagram of an optical lens 10 according to an eleventh embodiment of the present application. In this embodiment, the optical lens 10 is a six-lens including six lenses, which are, in order from an object side to an image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a complementary lens 16, and a fifth lens 15. The first lens 11 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is concave at the paraxial region; the second lens 12 is a positive focal power lens, and the object side surface and the image side surface of the second lens are convex surfaces at paraxial positions; the third lens 13 is a positive focal power lens, the object side surface of which is convex at the paraxial region and the image side surface of which is concave at the paraxial region; a fourth lens 14, a positive power lens, wherein the object-side surface and the image-side surface are convex surfaces at paraxial positions; the supplementary lens 16 is a negative focal power lens, and the object side surface and the image side surface of the supplementary lens are both concave surfaces at the paraxial position; the fifth lens element 15 is an M-shaped lens element having at least one inflection point on both the object-side surface and the image-side surface, wherein the object-side surface is convex at the paraxial region and the image-side surface is convex at the paraxial region. The fourth lens 14 is a glass lens, and the other lenses (including the first lens 11, the second lens 12, the third lens 13, the supplementary lens 16, and the fifth lens 15) are all plastic lenses.

The design parameters of the eleventh embodiment of the present application are as follows in table 31.

Table 31 basic parameters of the optical lens 10 of the eleventh embodiment

Focal length EFFL	5.62mm
		F # value	1.5
FOV	94°
		IH	9.5mm
Total optical length TTL	15mm
		EFFL/TTL	0.375
EFFL/IH	0.592
		EFFL/(F#×TTL)	0.250
(IH×EFFL)/(F#×TTL2)	0.158
		f4/EFFL	0.99
\|v2-v3\|	35.6
		\|v4-v3\|	29.2
\|v4-v5\|	29.2
		Design wavelength	650nm,610nm,555nm,510nm,470nm

In order to obtain the optical lens 10 having the optical basic parameters in table 31, parameters such as the curvature radius, thickness, refractive index, and abbe number of each lens and surface coefficients of the object-side surface and the image-side surface of each lens need to be able to be matched to obtain the optical lens 10 having the optical parameters in table 31. Referring to tables 32 and 33, table 32 shows parameters such as curvature radius, thickness, refractive index, and abbe number of each lens in the optical lens 10 according to the embodiment of the present disclosure, and table 33 shows surface coefficients of each lens in the optical lens 10 according to the embodiment of the present disclosure.

Table 32 radius of curvature, thickness, refractive index, and abbe number of each lens in optical lens 10 according to the eleventh embodiment

In the present embodiment, the object-side surface and the image-side surface of each lens are aspheric, and the surface coefficients thereof are aspheric coefficients. In the present embodiment, the surface coefficients of the respective lenses of the optical lens 10 are shown in table 33.

Table 33 aspherical surface coefficients of the optical lens 10 according to the eleventh embodiment

k

a4

a6

a8

a10

a12

a14

a16

a18

a20

R1

-3.45E-01

1.26E-02

-1.59E-03

1.72E-04

-1.41E-05

8.37E-07

-3.40E-08

8.87E-10

-1.32E-11

8.44E-14

R2

-5.00E+01

1.78E-02

-1.74E-03

4.55E-05

2.41E-05

-5.16E-06

5.27E-07

-2.97E-08

8.77E-10

-1.06E-11

R3

-2.97E+00

1.04E-02

-1.58E-03

2.69E-04

-3.81E-05

4.26E-06

-3.58E-07

1.89E-08

-4.20E-10

-4.09E-12

R4

7.63E+00

-7.19E-03

4.43E-03

-1.46E-03

3.22E-04

-4.80E-05

4.68E-06

-2.80E-07

9.16E-09

-1.22E-10

Stop

0.00E+00

R5

-3.59E+00

-1.81E-02

1.41E-03

5.64E-04

-4.19E-04

1.33E-04

-2.42E-05

2.63E-06

-1.59E-07

4.09E-09

R6

-5.85E-02

-1.55E-02

-3.39E-03

3.29E-03

-1.44E-03

3.96E-04

-6.89E-05

7.35E-06

-4.36E-07

1.09E-08

R7

-1.81E+00

6.56E-04

-5.97E-05

-1.73E-04

1.04E-04

-3.46E-05

6.78E-06

-7.40E-07

4.12E-08

-9.11E-10

R8

8.26E+00

-1.61E-03

-2.43E-04

3.25E-05

6.12E-06

4.38E-07

-2.60E-08

-1.11E-08

-1.42E-09

2.27E-10

R9

2.21E+01

-5.96E-03

2.44E-04

-4.06E-06

5.05E-06

1.04E-06

1.41E-07

-4.22E-08

-8.11E-09

1.14E-09

R10

-5.00E+01

-1.00E-03

6.70E-04

9.49E-05

-8.97E-05

2.96E-05

-5.23E-06

5.16E-07

-2.65E-08

5.47E-10

R11

6.42E+00

-1.97E-02

1.76E-03

-5.42E-04

2.20E-04

-5.73E-05

9.40E-06

-9.25E-07

4.95E-08

-1.10E-09

R12

-4.32E-01

-1.31E-02

4.11E-04

1.63E-04

-4.76E-05

6.71E-06

-5.67E-07

2.90E-08

-8.29E-10

1.01E-11

in the present embodiment, it is preferred that,

Fig. 45 to 47c are characteristic diagrams of optical performance of the optical lens 10 of the eleventh embodiment.

Specifically, fig. 45 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens 10 according to the tenth embodiment. Which indicates the focal depth position on the image side of the optical lens 10 after light of different wavelengths passes through the optical lens 10. The ordinate of fig. 45 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction in millimeters. As can be seen from fig. 45, in the present embodiment, the axial aberration is controlled within a small range, and the axial chromatic aberration of the optical lens 10 is corrected well.

Fig. 46 shows a chief ray incidence angle curve of the optical lens 10 according to the eleventh embodiment. The abscissa thereof represents the Image Height (IH) in millimeters (mm); the ordinate thereof represents the principal ray incidence angle (CRA) in degrees (°). Fig. 46 is used to characterize the change in the profile of chief ray incidence angles at different image heights. As can be seen from the figure, in the eleventh embodiment of the present application, the maximum chief ray incidence angle of the optical lens 10 reaches 36.5 °, and the optical lens 10 of the present embodiment can be adapted to a detector with a large chief ray incidence angle.

FIG. 47a is a temperature drift modulation contrast curve at normal temperature (22 ℃) of the optical lens 10 according to the eleventh embodiment; FIG. 47b is a temperature drift modulation contrast curve at-30 ℃ of the optical lens 10 according to the eleventh embodiment; fig. 47c is a temperature drift modulation contrast curve of the optical lens 10 of the tenth embodiment at +70 ℃. The abscissa is the spatial frequency, in units: lp/mm. The ordinate is the modulation contrast MTF. Each line in the graph represents the modulation contrast and spatial frequency relationship at different image height positions. As can be seen from fig. 47a, 47b, and 47c, the modulation contrast of the optical lens 10 is substantially the same at different temperatures, that is, the optical lens 10 of the present embodiment can clearly image under a wide temperature range, that is, the temperature drift of the optical lens 10 is small in a large temperature variation range, so that the optical lens 10 of the present embodiment can have a good imaging effect at different temperatures.

Referring to fig. 48, fig. 48 is a schematic partial structure view of an optical lens 10 according to a twelfth embodiment of the present disclosure. In this embodiment, the optical lens 10 is a six-lens including six lenses, which are, in order from an object side to an image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a complementary lens 16, and a fifth lens 15. The first lens 11 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is concave at the paraxial region; the second lens 12 is a positive focal power lens, and the object side surface and the image side surface of the second lens are convex surfaces at paraxial positions; the third lens 13 is a negative focal power lens, the object side surface of which is convex at the paraxial region and the image side surface of which is concave at the paraxial region; a fourth lens 14, a positive power lens, wherein the object-side surface and the image-side surface are convex surfaces at paraxial positions; the supplementary lens 16 is a negative focal power lens, and the object side surface and the image side surface of the supplementary lens are both concave surfaces at the paraxial position; the fifth lens element 15 is an M-shaped lens element having at least one inflection point on both the object-side surface and the image-side surface, wherein the object-side surface is convex at the paraxial region and the image-side surface is convex at the paraxial region. The second lens 12 is a glass lens, and the other lenses (including the first lens 11, the third lens 13, the fourth lens 14, the supplementary lens 16, and the fifth lens 15) are all plastic lenses.

The design parameters for the twelfth embodiment of the present application are set forth in table 34 below.

Table 34 basic parameters of the optical lens 10 of the twelfth embodiment

In order to obtain the optical lens 10 having the optical basic parameters in table 34, parameters such as the curvature radius, thickness, refractive index, and abbe number of each lens and surface coefficients of the object-side surface and the image-side surface of each lens need to be able to be matched to obtain the optical lens 10 having the optical parameters in table 34. Referring to tables 35 and 36, table 35 shows parameters such as a curvature radius, a thickness, a refractive index, and an abbe number of each lens in the optical lens 10 according to the embodiment of the present application, and table 36 shows a surface coefficient of each lens in the optical lens 10 according to the embodiment of the present application.

Table 35 radius of curvature, thickness, refractive index, and abbe number of each lens in the optical lens 10 according to the twelfth embodiment

In the present embodiment, the object-side surface and the image-side surface of each lens are aspheric, and the surface coefficients thereof are aspheric coefficients. In the present embodiment, the surface coefficients of the respective lenses of the optical lens 10 are shown in table 36.

Table 36 aspherical surface coefficients of optical lens 10 according to twelfth embodiment

k

a4

a6

a8

a10

a12

a14

a16

a18

a20

R1

-5.27E+00

8.30E-03

-6.65E-04

3.83E-05

-1.39E-06

3.33E-09

1.96E-09

-7.96E-11

1.34E-12

-8.51E-15

R2

-4.68E+01

9.46E-03

2.38E-04

-1.00E-04

1.22E-05

-2.27E-07

-8.75E-08

8.13E-09

-2.79E-10

3.45E-12

Stop

0.00E+00

R3

-5.00E+01

4.77E-03

-9.14E-04

1.05E-04

3.23E-05

-1.91E-05

4.24E-06

-5.01E-07

3.05E-08

-7.41E-10

R4

-9.76E+00

1.90E-04

-3.63E-05

-9.94E-06

-1.42E-06

7.56E-08

4.28E-19

-4.01E-22

-1.09E-23

-3.77E-25

R5

-5.18E+00

-7.80E-03

2.59E-03

-9.65E-04

2.98E-04

-9.37E-05

2.15E-05

-3.05E-06

2.35E-07

-7.47E-09

R6

-5.86E-01

-1.52E-02

4.10E-03

-1.48E-03

4.71E-04

-1.53E-04

3.67E-05

-5.43E-06

4.34E-07

-1.42E-08

R7

-7.01E-01

-2.49E-03

8.70E-04

-2.73E-05

-5.73E-05

1.80E-05

-2.48E-06

1.77E-07

-6.37E-09

9.11E-11

R8

5.79E-01

-2.72E-02

2.12E-02

-1.04E-02

3.56E-03

-8.29E-04

1.28E-04

-1.25E-05

6.86E-07

-1.61E-08

R9

-8.47E+00

-3.54E-02

2.04E-02

-8.16E-03

2.11E-03

-3.01E-04

3.46E-06

6.57E-06

-1.02E-06

5.10E-08

R10

4.29E-01

-1.52E-02

4.96E-03

-2.29E-04

-5.50E-04

2.91E-04

-7.63E-05

1.16E-05

-9.69E-07

3.34E-08

R11

2.97E+00

-2.58E-02

1.53E-03

-5.96E-05

-5.63E-06

-5.72E-06

2.65E-06

-4.56E-07

3.77E-08

-1.21E-09

R12

-2.97E-01

-2.73E-02

3.04E-03

-2.93E-04

1.11E-05

1.19E-06

-2.16E-07

1.47E-08

-4.99E-10

7.00E-12

in the present embodiment, it is preferred that,

Fig. 49 to 51c are characteristic diagrams of optical performance of the optical lens 10 of the twelfth embodiment.

Specifically, fig. 49 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens 10 according to the twelfth embodiment. Which indicates the focal depth position on the image side of the optical lens 10 after light of different wavelengths passes through the optical lens 10. The ordinate of fig. 49 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction in millimeters. As can be seen from fig. 49, in the present embodiment, the axial aberration is controlled within a small range, and the axial chromatic aberration of the optical lens 10 is corrected well.

Fig. 50 shows a chief ray incidence angle curve of the optical lens 10 according to the twelfth embodiment. The abscissa thereof represents the Image Height (IH) in millimeters (mm); the ordinate thereof represents the principal ray incidence angle (CRA) in degrees (°). Fig. 50 is used to characterize the change in the profile of chief ray incidence angles at different image heights. As can be seen from the figure, in the twelfth embodiment of the present application, the maximum chief ray incidence angle of the optical lens 10 reaches 38.7 °, and the optical lens 10 of the present embodiment can be adapted to a detector with a large chief ray incidence angle.

FIG. 51a is a temperature drift modulation contrast curve at normal temperature (22 ℃) of the optical lens 10 according to the twelfth embodiment; FIG. 51b is a temperature drift modulation contrast curve at-30 ℃ of the optical lens 10 according to the twelfth embodiment; fig. 51c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens 10 of the twelfth embodiment. The abscissa is the spatial frequency, in units: lp/mm. The ordinate is the modulation contrast MTF. Each line in the graph represents the modulation contrast and spatial frequency relationship at different image height positions. As can be seen from fig. 51a, 51b, and 51c, the modulation contrast of the optical lens 10 is substantially the same at different temperatures, that is, the optical lens 10 of the present embodiment can clearly image under a wide temperature range, that is, the temperature drift of the optical lens 10 is small in a large temperature variation range, so that the optical lens 10 of the present embodiment can have a good imaging effect at different temperatures.

Referring to fig. 52, fig. 52 is a schematic partial structure view of an optical lens 10 according to a thirteenth embodiment of the present application. In this embodiment, the optical lens 10 is a six-lens including six lenses, which are, in order from an object side to an image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a complementary lens 16, and a fifth lens 15. The first lens 11 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is concave at the paraxial region; the second lens 12 is a positive focal power lens, and the object side surface and the image side surface of the second lens are convex surfaces at paraxial positions; the third lens 13 is a negative focal power lens, the object side surface of which is convex at the paraxial region and the image side surface of which is concave at the paraxial region; a fourth lens 14, a positive power lens, wherein the object-side surface and the image-side surface are convex surfaces at paraxial positions; the supplementary lens 16 is a positive focal power lens, and the object side surface and the image side surface of the supplementary lens are both concave surfaces at the paraxial position; the fifth lens element 15 is an M-shaped lens element having at least one inflection point on both the object-side surface and the image-side surface, wherein the object-side surface is convex at the paraxial region and the image-side surface is convex at the paraxial region. The second lens 12 is a glass lens, and the other lenses (including the first lens 11, the third lens 13, the fourth lens 14, the supplementary lens 16, and the fifth lens 15) are all plastic lenses.

The design parameters of the thirteenth embodiment of the present application are as follows in table 37.

Table 37 basic parameters of the optical lens 10 of the thirteenth embodiment

In order to obtain the optical lens 10 having the optical basic parameters in table 37, parameters such as the curvature radius, thickness, refractive index, and abbe number of each lens and surface coefficients of the object-side surface and the image-side surface of each lens need to be able to be matched to obtain the optical lens 10 having the optical parameters in table 37. Referring to tables 38 and 39, table 38 shows parameters such as a curvature radius, a thickness, a refractive index, and an abbe number of each lens in the optical lens 10 according to the embodiment of the present application, and table 39 shows a surface coefficient of each lens in the optical lens 10 according to the embodiment of the present application.

Table 38 radius of curvature, thickness, refractive index, and abbe number of each lens in the optical lens 10 according to the thirteenth embodiment

In the present embodiment, the object-side surface and the image-side surface of each lens are aspheric, and the surface coefficients thereof are aspheric coefficients. In the optical lens 10 of the present embodiment, the surface coefficients of the respective lenses are shown in table 39.

Table 39 aspherical surface coefficients of optical lens 10 according to the thirteenth embodiment

in the present embodiment, it is preferred that,

Fig. 53 to 55c are characteristic diagrams of the optical performance of the optical lens 10 of the thirteenth embodiment.

Specifically, fig. 53 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens 10 according to the thirteenth embodiment. Which indicates the focal depth position on the image side of the optical lens 10 after light of different wavelengths passes through the optical lens 10. The ordinate of fig. 53 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction in millimeters. As can be seen from fig. 53, in the present embodiment, the axial aberration is controlled within a small range, and the axial chromatic aberration of the optical lens 10 is corrected well.

Fig. 54 shows a principal ray incidence angle curve of the optical lens 10 according to the thirteenth embodiment. The abscissa thereof represents the Image Height (IH) in millimeters (mm); the ordinate thereof represents the principal ray incidence angle (CRA) in degrees (°). Fig. 54 is used to characterize the change in the profile of chief ray incidence angles at different image heights. As can be seen from the figure, in the thirteenth embodiment of the present application, the maximum chief ray incidence angle of the optical lens 10 reaches 38.8 °, and the optical lens 10 of the present embodiment can be adapted to a detector with a large chief ray incidence angle.

FIG. 55a is a temperature drift modulation contrast curve at normal temperature (22 ℃) of the optical lens 10 according to the thirteenth embodiment; fig. 55b is a temperature drift modulation contrast curve at-30 ℃ of the optical lens 10 of the thirteenth embodiment; fig. 55c is a temperature drift modulation contrast curve of the optical lens 10 of the thirteenth embodiment at +70 ℃. The abscissa is the spatial frequency, in units: lp/mm. The ordinate is the modulation contrast MTF. Each line in the graph represents the modulation contrast and spatial frequency relationship at different image height positions. As can be seen from fig. 55a, 55b, and 55c, the modulation contrast of the optical lens 10 is substantially the same at different temperatures, that is, the optical lens 10 of the present embodiment can clearly image under a wide temperature range, that is, the temperature drift of the optical lens 10 is small in a large temperature variation range, so that the optical lens 10 of the present embodiment can have a good imaging effect at different temperatures.

Referring to fig. 56, fig. 56 is a schematic partial structure view of an optical lens 10 according to a fourteenth embodiment of the present application. In this embodiment, the optical lens 10 is a six-lens including six lenses, which are, in order from an object side to an image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a complementary lens 16, and a fifth lens 15. The first lens 11 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is concave at the paraxial region; the second lens 12 is a positive focal power lens, and the object side surface and the image side surface of the second lens are convex surfaces at paraxial positions; the third lens 13 is a negative focal power lens, the object side surface of which is convex at the paraxial region and the image side surface of which is concave at the paraxial region; a fourth lens 14, a positive power lens, wherein the object-side surface and the image-side surface are convex surfaces at paraxial positions; the supplementary lens 16 is a negative focal power lens, and the object side surface and the image side surface of the supplementary lens are both concave surfaces at the paraxial position; the fifth lens element 15 is an M-shaped lens element, the object-side surface of which has no inflection points, the object-side surface of which is concave at the paraxial region, the image-side surfaces of which have at least one inflection point, and the image-side surface of which is convex at the paraxial region. The second lens 12 is a glass lens, and the other lenses (including the first lens 11, the third lens 13, the fourth lens 14, the supplementary lens 16, and the fifth lens 15) are all plastic lenses.

The design parameters of the fourteenth embodiment of the present application are as follows in table 40.

Table 40 basic parameters of the optical lens 10 of the fourteenth embodiment

Focal length EFFL	5.79mm
		F # value	1.5
FOV	94°
		IH	9.5mm
Total optical length TTL	14mm
		EFFL/TTL	0.41
EFFL/IH	0.609
		EFFL/(F#×TTL)	0.276
(IH×EFFL)/(F#×TTL2)	0.187
		f4/EFFL	0.879
\|v2-v3\|	29.2
		\|v4-v3\|	35.6
\|v4-v5\|	35.6
		Design wavelength	650nm,610nm,555nm,510nm,470nm

In order to obtain the optical lens 10 having the optical basic parameters in table 40, parameters such as the curvature radius, thickness, refractive index, and abbe number of each lens and surface coefficients of the object-side surface and the image-side surface of each lens need to be able to be matched to obtain the optical lens 10 having the optical parameters in table 40. Referring to tables 41 and 42, table 41 shows parameters such as a curvature radius, a thickness, a refractive index, and an abbe number of each lens in the optical lens 10 according to the embodiment of the present application, and table 42 shows a surface coefficient of each lens in the optical lens 10 according to the embodiment of the present application.

Table 41 radius of curvature, thickness, refractive index, abbe number of each lens in optical lens 10 according to the fourteenth embodiment

In the present embodiment, the object-side surface and the image-side surface of each lens are aspheric, and the surface coefficients thereof are aspheric coefficients. The surface coefficients of the respective lenses in the optical lens 10 in the present embodiment are shown in table 42.

Table 42 aspherical surface coefficients of optical lens 10 of the fourteenth embodiment

in the present embodiment, it is preferred that,

Fig. 57 to fig. 59c are characteristic diagrams of optical performance of the optical lens 10 of the fourteenth embodiment.

Specifically, fig. 57 is a schematic view of axial chromatic aberration after light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm passes through the optical lens 10 according to the fourteenth embodiment. Which indicates the focal depth position on the image side of the optical lens 10 after light of different wavelengths passes through the optical lens 10. The ordinate of fig. 57 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction in millimeters. As can be seen from fig. 57, in the present embodiment, the axial aberration is controlled within a small range, and the axial chromatic aberration of the optical lens 10 is corrected well.

Fig. 58 shows a chief ray incident angle curve of the optical lens 10 according to the fourteenth embodiment. The abscissa thereof represents the Image Height (IH) in millimeters (mm); the ordinate thereof represents the principal ray incidence angle (CRA) in degrees (°). Fig. 58 is used to characterize the change in the profile of chief ray incidence angles at different image heights. As can be seen from the figure, in the fourteenth embodiment of the present application, the maximum chief ray incidence angle of the optical lens 10 reaches 38.8 °, and the optical lens 10 of the present embodiment can be adapted to a detector with a large chief ray incidence angle.

FIG. 59a is a temperature drift modulation contrast curve at normal temperature (22 ℃) of the optical lens 10 according to the fourteenth embodiment; FIG. 59b is a temperature-drift modulation contrast curve at-30 ℃ of the optical lens 10 according to the fourteenth embodiment; fig. 59c is a temperature drift modulation contrast curve of the optical lens 10 of the fourteenth embodiment at +70 ℃. The abscissa is the spatial frequency, in units: lp/mm. The ordinate is the modulation contrast MTF. Each line in the graph represents the modulation contrast and spatial frequency relationship at different image height positions. As can be seen from fig. 59a, 59b, and 59c, the modulation contrast of the optical lens 10 is substantially the same at different temperatures, that is, the optical lens 10 of the present embodiment can clearly image under a wide temperature range, that is, the temperature drift of the optical lens 10 is small in a large temperature variation range, so that the optical lens 10 of the present embodiment can have a good imaging effect at different temperatures.

Referring to fig. 60, fig. 60 is a schematic partial structure view of an optical lens 10 according to a fifteenth embodiment of the present application. In this embodiment, the optical lens 10 is a six-lens including six lenses, which are, in order from an object side to an image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a complementary lens 16, and a fifth lens 15. The first lens 11 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is concave at the paraxial region; the second lens 12 is a positive focal power lens, and the object side surface and the image side surface of the second lens are convex surfaces at paraxial positions; the third lens 13 is a negative focal power lens, the object side surface of which is convex at the paraxial region and the image side surface of which is concave at the paraxial region; a fourth lens 14, a positive power lens, wherein the object-side surface and the image-side surface are convex surfaces at paraxial positions; the supplementary lens 16 is a negative focal power lens, and the object side surface and the image side surface of the supplementary lens are both concave surfaces at the paraxial position; the fifth lens element 15 is an M-shaped lens element, the object-side surface of which has no inflection points, the object-side surface of which is concave at the paraxial region, the image-side surfaces of which have at least one inflection point, and the image-side surface of which is convex at the paraxial region. The second lens 12 is a glass lens, and the other lenses (including the first lens 11, the third lens 13, the fourth lens 14, the supplementary lens 16, and the fifth lens 15) are all plastic lenses.

The design parameters of the fifteenth embodiment of the present application are as follows in table 43.

Table 43 basic parameters of the optical lens 10 of the fifteenth embodiment

Focal length EFFL	6.0mm
		F # value	2.0
FOV	94°
		IH	9.5mm
Total optical length TTL	10mm
		EFFL/TTL	0.62
EFFL/IH	0.633
		EFFL/(F#×TTL)	0.301
(IH×EFFL)/(F#×TTL2)	0.286
		f4/EFFL	0.96
\|v2-v3\|	35.6
		\|v4-v3\|	29.2
\|v4-v5\|	29.2
		Design wavelength	650nm,610nm,555nm,510nm,470nm

From the above table, it can be seen that: the optical lens 10 provided in the present embodiment has an F # value of 2.0, an overall optical length TTL of 10mm, an IH of 9.5mm, and an FOV of 94 °, i.e., the optical lens 10 of the present embodiment can simultaneously have characteristics of a large aperture, a large angle of view, a large image height (with high resolution), and a small optical length. The optical lens 10 of the present embodiment has a smaller total optical length than that of the seventh embodiment, and can be applied to a smaller electronic device.

In order to obtain the optical lens 10 having the optical basic parameters in table 43, parameters such as the radius of curvature, thickness, refractive index, and abbe number of each lens, and surface coefficients of the object-side surface and the image-side surface of each lens need to be able to be matched to obtain the optical lens 10 having the optical parameters in table 43. Referring to tables 44 and 45, table 44 shows parameters such as a curvature radius, a thickness, a refractive index, and an abbe number of each lens in the optical lens 10 according to the embodiment of the present application, and table 45 shows a surface coefficient of each lens in the optical lens 10 according to the embodiment of the present application.

Table 44 radius of curvature, thickness, refractive index, and abbe number of each lens in the optical lens 10 according to the fifteenth embodiment

In the present embodiment, the object-side surface and the image-side surface of each lens are aspheric, and the surface coefficients thereof are aspheric coefficients. In the optical lens 10 of the present embodiment, the surface coefficients of the respective lenses are shown in table 45.

Table 45 aspherical surface coefficients of optical lens 10 according to the fifteenth embodiment

in the present embodiment, it is preferred that,

Fig. 61 to 63c are characteristic diagrams of optical performance of the optical lens 10 according to the fifteenth embodiment.

Specifically, fig. 61 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens 10 according to the tenth fifth embodiment. Which indicates the focal depth position on the image side of the optical lens 10 after light of different wavelengths passes through the optical lens 10. The ordinate of fig. 61 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction in millimeters. As can be seen from fig. 61, in the present embodiment, the axial aberration is controlled within a small range, and the axial chromatic aberration of the optical lens 10 is corrected well.

Fig. 62 shows a chief ray incidence angle curve of the optical lens 10 according to the fifteenth embodiment. The abscissa thereof represents the Image Height (IH) in millimeters (mm); the ordinate thereof represents the principal ray incidence angle (CRA) in degrees (°). Fig. 62 is used to characterize the change in the profile of chief ray incidence angles at different image heights. As can be seen from the figure, in the fifteenth embodiment of the present application, the maximum chief ray incidence angle of the optical lens 10 reaches 39.0 °, and the optical lens 10 of the present embodiment can be adapted to a detector with a large chief ray incidence angle.

Fig. 63a is a temperature drift modulation contrast curve at normal temperature (22 ℃) of the optical lens 10 according to the fifteenth embodiment; FIG. 63b is a temperature-drift modulation contrast curve of the optical lens 10 of the fifteenth embodiment at-30 ℃; fig. 63c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens 10 of the tenth fifth embodiment. The abscissa is the spatial frequency, in units: lp/mm. The ordinate is the modulation contrast MTF. Each line in the graph represents the modulation contrast and spatial frequency relationship at different image height positions. As can be seen from fig. 63a, 63b, and 63c, the modulation contrast of the optical lens 10 is substantially the same at different temperatures, that is, the optical lens 10 of the present embodiment can clearly image under a wide temperature range, that is, the temperature drift of the optical lens 10 is small in a large temperature variation range, so that the optical lens 10 of the present embodiment can have a good imaging effect at different temperatures.

Referring to fig. 64, fig. 64 is a schematic partial structure view of an optical lens 10 according to a sixteenth embodiment of the present application. In this embodiment, the optical lens 10 is a six-lens including six lenses, which are, in order from an object side to an image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a complementary lens 16, and a fifth lens 15. The first lens 11 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is concave at the paraxial region; the second lens 12 is a positive focal power lens, and the object side surface and the image side surface of the second lens are convex surfaces at paraxial positions; the third lens 13 is a negative focal power lens, the object side surface of which is convex at the paraxial region and the image side surface of which is concave at the paraxial region; a fourth lens 14, a positive power lens, wherein the object-side surface and the image-side surface are convex surfaces at paraxial positions; the supplementary lens 16 is a negative focal power lens, and the object side surface and the image side surface of the supplementary lens are both concave surfaces at the paraxial position; the fifth lens element 15 is an M-shaped lens element, the object-side surface of which has no inflection points, the object-side surface of which is concave at the paraxial region, the image-side surfaces of which have at least one inflection point, and the image-side surface of which is convex at the paraxial region. The second lens 12 is a glass lens, and the other lenses (including the first lens 11, the third lens 13, the fourth lens 14, the supplementary lens 16, and the fifth lens 15) are all plastic lenses.

The design parameters of the sixteenth embodiment of the present application are as follows in table 46.

Table 46 basic parameters of the optical lens 10 of the sixteenth embodiment

Focal length EFFL	5.82mm
		F # value	2.0
FOV	44°
		IH	4.6mm
Total optical length TTL	7mm
		EFFL/TTL	0.83
EFFL/IH	1.26
		EFFL/(F#×TTL)	0.417
(IH×EFFL)/(F#×TTL2)	0.27
		f4/EFFL	0.96
\|v2-v3\|	35.6
		\|v4-v3\|	29.2
\|v4-v5\|	29.2
		Design wavelength	650nm,610nm,555nm,510nm,470nm

From the above table, it can be seen that: the optical lens 10 provided in the present embodiment has an F # value of 2.0, an overall optical length TTL of 7mm, an IH of 4.6mm, and an FOV of 44 °, that is, the optical lens 10 of the present embodiment can simultaneously have characteristics of a large aperture, a large angle of view, a large image height (with high resolution), and a small optical length. The optical lens 10 of the present embodiment has a smaller total optical length than that of the seventh embodiment, and can be applied to a small-sized electronic device.

In order to obtain the optical lens 10 having the optical basic parameters in table 46, parameters such as the curvature radius, thickness, refractive index, and abbe number of each lens, and surface coefficients of the object-side surface and the image-side surface of each lens need to be able to be matched to obtain the optical lens 10 having the optical parameters in table 46. Referring to tables 47 and 48, table 47 shows parameters such as a curvature radius, a thickness, a refractive index, and an abbe number of each lens in the optical lens 10 according to the embodiment of the present disclosure, and table 48 shows a surface coefficient of each lens in the optical lens 10 according to the embodiment of the present disclosure.

Table 47 radius of curvature, thickness, refractive index, and abbe number of each lens in the optical lens 10 according to the sixteenth embodiment

In the present embodiment, the object-side surface and the image-side surface of each lens are aspheric, and the surface coefficients thereof are aspheric coefficients. The surface coefficients of the respective lenses of the optical lens 10 in the present embodiment are shown in table 48.

Table 48 aspherical surface coefficients of optical lens 10 of the sixteenth embodiment

in the present embodiment, it is preferred that,

Fig. 65 to 67c are characteristic diagrams of optical performance of the optical lens 10 according to the sixteenth embodiment.

Specifically, fig. 65 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens 10 according to the sixteenth embodiment. Which indicates the focal depth position on the image side of the optical lens 10 after light of different wavelengths passes through the optical lens 10. The ordinate of fig. 65 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction in millimeters. As can be seen from fig. 65, in the present embodiment, the axial aberration is controlled within a small range, and the axial chromatic aberration of the optical lens 10 is corrected well.

Fig. 66 shows a chief ray incidence angle curve of the optical lens 10 according to the sixteenth embodiment. The abscissa thereof represents the Image Height (IH) in millimeters (mm); the ordinate thereof represents the principal ray incidence angle (CRA) in degrees (°). Fig. 66 is used to characterize the change in the profile of chief ray incidence angles at different image heights. As can be seen from the figure, in the sixteenth embodiment of the present application, the maximum chief ray incidence angle of the optical lens 10 reaches 27.4 °, and the optical lens 10 of the present embodiment can be adapted to a detector with a large chief ray incidence angle.

FIG. 67a is a temperature drift modulation contrast curve at room temperature (22 ℃) of the optical lens 10 according to the sixteenth embodiment; FIG. 67b is a temperature-drift modulation contrast curve at-30 ℃ of the optical lens 10 according to the sixteenth embodiment; fig. 67c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens 10 of the sixteenth embodiment. The abscissa is the spatial frequency, in units: lp/mm. The ordinate is the modulation contrast MTF. Each line in the graph represents the modulation contrast and spatial frequency relationship at different image height positions. As can be seen from fig. 67a, 67b, and 67c, the modulation contrast of the optical lens 10 is substantially the same at different temperatures, that is, the optical lens 10 of the present embodiment can clearly image under a wide temperature range, that is, the temperature drift of the optical lens 10 is small in a large temperature variation range, so that the optical lens 10 of the present embodiment can have a good imaging effect at different temperatures.

Referring to fig. 68, fig. 68 is a schematic partial structural view of an optical lens 10 according to a seventeenth embodiment of the present application. In this embodiment, the optical lens 10 is a six-lens including six lenses, which are, in order from an object side to an image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a complementary lens 16, and a fifth lens 15. The first lens 11 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is concave at the paraxial region; the second lens 12 is a positive focal power lens, and the object side surface and the image side surface of the second lens are convex surfaces at paraxial positions; the third lens 13 is a negative focal power lens, the object side surface of which is convex at the paraxial region and the image side surface of which is concave at the paraxial region; a fourth lens 14, a positive power lens, wherein the object-side surface and the image-side surface are convex surfaces at paraxial positions; the supplementary lens 16 is a negative focal power lens, and the object side surface and the image side surface of the supplementary lens are both concave surfaces at the paraxial position; the fifth lens element 15 is an M-shaped lens element, the object-side surface of which has no inflection points, the object-side surface of which is concave at the paraxial region, the image-side surfaces of which have at least one inflection point, and the image-side surface of which is convex at the paraxial region. The second lens 12 is a glass lens, and the other lenses (including the first lens 11, the third lens 13, the fourth lens 14, the supplementary lens 16, and the fifth lens 15) are all plastic lenses.

The design parameters of the seventeenth embodiment of the present application are as follows in table 49.

Table 49 basic parameters of the optical lens 10 of the seventeenth embodiment

Focal length EFFL	3.96mm
		F # value	2.0
FOV	128°
		IH	9.5mm
Total optical length TTL	15.58mm
		EFFL/TTL	0.254
EFFL/IH	0.417
		EFFL/(F#×TTL)	0.127
(IH×EFFL)/(F#×TTL2)	0.077
		f4/EFFL	1.20
\|v2-v3\|	35.6
		\|v4-v3\|	29.2
\|v4-v5\|	29.2
		Design wavelength	650nm,610nm,555nm,510nm,470nm

In order to obtain the optical lens 10 having the optical basic parameters in table 49, the parameters such as the curvature radius, thickness, refractive index, and abbe number of each lens and the surface coefficients of the object-side surface and the image-side surface of each lens need to be able to be matched to obtain the optical lens 10 having the optical parameters in table 49. Referring to tables 50 and 51, table 50 shows parameters such as curvature radius, thickness, refractive index, and abbe number of each lens in the optical lens 10 according to the embodiment of the present disclosure, and table 51 shows surface coefficients of each lens in the optical lens 10 according to the embodiment of the present disclosure.

Table 50 radius of curvature, thickness, refractive index, and abbe number of each lens in optical lens 10 according to the seventeenth embodiment

In the present embodiment, the object-side surface and the image-side surface of each lens are aspheric, and the surface coefficients thereof are aspheric coefficients. In the present embodiment, the surface coefficients of the respective lenses of the optical lens 10 are shown in table 51.

Table 51 aspherical surface coefficients of optical lens 10 according to the seventeenth embodiment

in the present embodiment, it is preferred that,

Fig. 69 to 71c are characteristic diagrams of the optical performance of the optical lens 10 of the seventeenth embodiment.

Specifically, fig. 69 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens 10 according to the seventeenth embodiment. Which indicates the focal depth position on the image side of the optical lens 10 after light of different wavelengths passes through the optical lens 10. The ordinate of fig. 69 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction in millimeters. As can be seen from fig. 69, in the present embodiment, the axial aberration is controlled within a small range, and the axial chromatic aberration of the optical lens 10 is corrected well.

Fig. 70 shows a principal ray incidence angle curve of the optical lens 10 according to the seventeenth embodiment. The abscissa thereof represents the Image Height (IH) in millimeters (mm); the ordinate thereof represents the principal ray incidence angle (CRA) in degrees (°). The graph 70 is used to characterize the change in the profile of chief ray incidence angles at different image heights. As can be seen from the figure, in the seventeenth embodiment of the present application, the maximum chief ray incidence angle of the optical lens 10 reaches 37.6 °, and the optical lens 10 of the present embodiment can be adapted to a detector with a large chief ray incidence angle.

FIG. 71a is a temperature drift modulation contrast curve at room temperature (22 ℃) of the optical lens 10 according to the seventeenth embodiment; FIG. 71b is a temperature drift modulation contrast curve at-30 ℃ for the optical lens 10 of the seventeenth embodiment; fig. 71c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens 10 of the seventeenth embodiment. The abscissa is the spatial frequency, in units: lp/mm. The ordinate is the modulation contrast MTF. Each line in the graph represents the modulation contrast and spatial frequency relationship at different image height positions. As can be seen from fig. 71a, 71b, and 71c, the modulation contrast of the optical lens 10 is substantially the same at different temperatures, that is, the optical lens 10 of the present embodiment can clearly image under a wide temperature range, that is, the temperature drift of the optical lens 10 is small in a large temperature variation range, so that the optical lens 10 of the present embodiment can have a good imaging effect at different temperatures.

Referring to fig. 72, fig. 72 is a schematic partial structure view of an optical lens 10 according to an eighteenth embodiment of the present application. In this embodiment, the optical lens 10 is a six-lens including six lenses, which are, in order from an object side to an image side, a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a complementary lens 16, and a fifth lens 15. The first lens 11 is a negative focal power lens, the object side surface of which is concave at the paraxial region and the image side surface of which is concave at the paraxial region; the second lens 12 is a positive focal power lens, and the object side surface and the image side surface of the second lens are convex surfaces at paraxial positions; the third lens 13 is a negative focal power lens, the object side surface of which is convex at the paraxial region and the image side surface of which is concave at the paraxial region; a fourth lens 14, a positive power lens, wherein the object-side surface and the image-side surface are convex surfaces at paraxial positions; the supplementary lens 16 is a negative focal power lens, and the object side surface and the image side surface of the supplementary lens are both concave surfaces at the paraxial position; the fifth lens element 15 is an M-shaped lens element, the object-side surface of which has no inflection points, the object-side surface of which is concave at the paraxial region, the image-side surfaces of which have at least one inflection point, and the image-side surface of which is convex at the paraxial region. The second lens 12 is a glass lens, and the other lenses (including the first lens 11, the third lens 13, the fourth lens 14, the supplementary lens 16, and the fifth lens 15) are all plastic lenses.

The design parameters of the eighteenth embodiment of the present application are as follows in table 52.

Table 52 basic parameters of the optical lens 10 of the eighteenth embodiment

Focal length EFFL	4.0mm
		F # value	1.0
FOV	44°
		IH	3.52mm
Total optical length TTL	15.58mm
		EFFL/TTL	0.241
EFFL/IH	1.14
		EFFL/(F#×TTL)	0.241
(IH×EFFL)/(F#×TTL2)	0.05
		f4/EFFL	1.06
\|v2-v3\|	35.6
		\|v4-v3\|	29.2
\|v4-v5\|	29.2
		Design wavelength	650nm,610nm,555nm,510nm,470nm

In order to obtain the optical lens 10 having the optical basic parameters in table 52, parameters such as the curvature radius, thickness, refractive index, and abbe number of each lens, and surface coefficients of the object-side surface and the image-side surface of each lens need to be able to be matched to obtain the optical lens 10 having the optical parameters in table 52. Referring to tables 53 and 54, table 53 shows parameters such as a curvature radius, a thickness, a refractive index, and an abbe number of each lens in the optical lens 10 according to the embodiment of the present application, and table 54 shows a surface coefficient of each lens in the optical lens 10 according to the embodiment of the present application.

Table 53 radius of curvature, thickness, refractive index, and abbe number of each lens in optical lens 10 according to the eighteenth embodiment

In the present embodiment, the object-side surface and the image-side surface of each lens are aspheric, and the surface coefficients thereof are aspheric coefficients. In the optical lens 10 of the present embodiment, the surface coefficients of the respective lenses are shown in table 54.

Table 54 aspherical surface coefficients of optical lens 10 according to the eighteenth embodiment

k

a4

a6

a8

a10

a12

a14

a16

a18

a20

R1

-7.44E-01

1.28E-02

-1.08E-03

9.66E-05

-8.47E-06

5.93E-07

-2.78E-08

7.92E-10

-1.23E-11

8.02E-14

R2

-3.01E+01

8.56E-03

5.05E-05

-9.61E-05

2.38E-05

-4.06E-06

4.30E-07

-2.57E-08

7.91E-10

-9.73E-12

R3

-4.81E+00

6.70E-03

-2.95E-04

-4.87E-05

3.17E-05

-8.66E-06

1.35E-06

-1.22E-07

5.83E-09

-1.17E-10

R4

4.03E+00

7.65E-03

-2.72E-03

6.03E-04

-4.63E-05

-6.47E-06

1.68E-06

-1.47E-07

6.06E-09

-9.92E-11

Stop

0.00E+00

R5

-3.17E+00

-2.25E-03

-2.73E-03

-1.77E-03

1.45E-03

-4.23E-04

6.57E-05

-5.79E-06

2.73E-07

-5.40E-09

R6

3.21E-01

-4.31E-03

-6.19E-04

-4.10E-03

2.76E-03

-8.50E-04

1.50E-04

-1.55E-05

8.95E-07

-2.23E-08

R7

-1.37E+00

4.68E-03

-8.94E-04

1.81E-04

-2.35E-04

1.31E-04

-3.72E-05

5.66E-06

-4.42E-07

1.40E-08

R8

7.88E+00

-7.02E-04

-1.16E-04

3.91E-05

4.89E-06

9.75E-08

-6.60E-08

-1.22E-08

-8.78E-10

3.54E-10

R9

-5.00E+01

-3.15E-03

4.93E-04

4.06E-05

1.23E-05

1.71E-06

1.15E-07

-6.34E-08

-1.17E-08

8.41E-10

R10

-3.69E+01

-9.32E-03

2.83E-03

-9.10E-04

3.05E-04

-6.62E-05

8.51E-06

-6.25E-07

2.41E-08

-3.81E-10

R11

-5.57E+00

-7.00E-03

-3.00E-02

2.45E-03

3.36E-03

-1.29E-03

2.14E-04

-1.84E-05

7.87E-07

-1.31E-08

R12

-1.00E+00

-2.27E-02

-3.59E-02

2.00E-02

-4.88E-03

6.62E-04

-5.32E-05

2.53E-06

-6.62E-08

7.34E-10

in the present embodiment, it is preferred that,

Fig. 73 to 75c are characteristic diagrams of optical performance of the optical lens 10 of the eighteenth embodiment.

Specifically, fig. 73 is a schematic view of axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm after passing through the optical lens 10 according to the eighteenth embodiment. Which indicates the focal depth position on the image side of the optical lens 10 after light of different wavelengths passes through the optical lens 10. The ordinate of fig. 73 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction in millimeters. As can be seen from fig. 73, in the present embodiment, the axial aberration is controlled within a small range, and the axial chromatic aberration of the optical lens 10 is corrected well.

Fig. 74 shows a chief ray incident angle curve of the optical lens 10 according to the eighteenth embodiment. The abscissa thereof represents the Image Height (IH) in millimeters (mm); the ordinate thereof represents the principal ray incidence angle (CRA) in degrees (°). Fig. 74 is used to characterize the change in the profile of chief ray incidence angles at different image heights. As can be seen from the figure, in the eighteenth embodiment of the present application, the maximum chief ray incidence angle of the optical lens 10 reaches 28.1 °, and the optical lens 10 of the present embodiment can be adapted to a detector with a large chief ray incidence angle.

FIG. 75a is a temperature drift modulation contrast curve at room temperature (22 ℃) of the optical lens 10 according to the eighteenth embodiment; FIG. 75b is a temperature drift modulation contrast curve of the optical lens 10 of the eighteenth embodiment at-30 ℃; fig. 75c is a temperature drift modulation contrast curve at +70 ℃ of the optical lens 10 of the eighteenth embodiment. The abscissa is the spatial frequency, in units: lp/mm. The ordinate is the modulation contrast MTF. Each line in the graph represents the modulation contrast and spatial frequency relationship at different image height positions. As can be seen from fig. 75a, 75b, and 75c, the modulation contrast of the optical lens 10 is substantially the same at different temperatures, that is, the optical lens 10 of the present embodiment can clearly image under a wide temperature range, that is, the temperature drift of the optical lens 10 is small in a large temperature variation range, so that the optical lens 10 of the present embodiment can have a good imaging effect at different temperatures.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An optical lens is characterized by comprising five lenses or six lenses, wherein when the optical lens comprises five lenses, the five lenses are respectively a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged from an object side to an image side; when the optical lens has six lenses, the six lenses are respectively a first lens, a second lens, a third lens, a fourth lens, a supplementary lens and a fifth lens which are sequentially arranged from an object side to an image side, and the first lens, the second lens, the third lens, the fourth lens and the fifth lens all comprise an object side surface facing the object side and an image side surface facing the image side;

the first lens has negative focal power, the second lens has positive focal power, the third lens has positive focal power, the fourth lens has positive focal power, the fifth lens has negative focal power, the fifth lens is an M-shaped lens, and at least one inflection point exists on at least one of the object side surface and the image side surface of the fifth lens;

the aperture value F # of the optical lens satisfies: f # is more than or equal to 0.8 and less than or equal to 2.8;

the relation between the effective focal length EFFL of the optical lens and the total optical length TTL of the optical lens meets the following requirements: EFFL/TTL is more than or equal to 0.2 and less than or equal to 0.9.

2. An optical lens according to claim 1, wherein at least one of the second lens and the fourth lens is a glass lens and the other lenses of the optical lens are plastic lenses.

3. The optical lens of claim 2, wherein the object-side surface and the image-side surface of the second lens are convex at the paraxial region, and the object-side surface and the image-side surface of the fourth lens are convex at the paraxial region.

4. An optical lens element according to any one of claims 1 to 3, characterized in that the object side surface of the first lens element is concave at the paraxial region.

5. An optical lens element according to any one of claims 1 to 4, characterized in that the object-side surface of the third lens element is convex at the paraxial region and the image-side surface of the third lens element is concave at the paraxial region.

6. An optical lens according to any one of claims 1 to 5, characterized in that the focal length f of the fourth lens element₄A relationship with a focal length EFFL of the optical lens satisfies: f is not less than 0.5₄/EFFL≤2.0。

7. An optical lens according to any one of claims 1 to 6, characterized in that the relationship between the effective focal length EFFL of the optical lens and the maximum image height IH of the optical lens satisfies: EFFL/IH is more than or equal to 0.4 and less than or equal to 2.0.

8. An optical lens according to any one of claims 1 to 7, wherein the relationship between the effective focal length EFFL, the aperture value F # and the total optical length TTL of the optical lens satisfies: EFFL/(F #. times TTL) is more than or equal to 0.1 and less than or equal to 0.5.

9. An optical lens unit according to any one of claims 1 to 8, wherein the relationship among the effective focal length EFFL, total optical length TTL, maximum image height IH, and F # of the optical lens unit satisfies: (IH multiplied by EFFL)/(F # × TTL2) is less than or equal to 0.3.

10. An optical lens according to any one of claims 1 to 9, characterized in that the field angle FOV of the optical lens satisfies 40 ° ≦ FOV ≦ 140 °.

11. An optical lens according to any one of claims 1 to 9, characterized in that the abbe number v2 of the second optic and the abbe number v3 of the third optic satisfy the relationship: and | v2-v3| ≧ 15.

12. An optical lens according to any one of claims 1 to 11, characterized in that the abbe number v4 of the fourth lens element and the abbe number v3 of the third lens element satisfy the relationship: and | v4-v3| ≧ 15.

13. An optical lens according to any one of claims 1 to 12, characterized in that the supplementary lens has an optical power and the abbe number v5 of the supplementary lens and the abbe number v4 of the fourth lens satisfy the relationship: and | v4-v5| ≧ 15.

14. A camera module, comprising an optical lens according to any one of claims 1 to 13 and a photosensitive element, wherein the photosensitive element is located on an image side of the optical lens, and the photosensitive element is configured to convert an optical signal transmitted through the optical lens into an electrical signal.

15. An electronic device comprising an image processor and the camera module of claim 14, the image processor communicatively coupled to the camera module, the camera module configured to obtain image data and input the image data to the image processor, the image processor configured to process the image data output therefrom.