WO2020151251A1 - Optical lens assembly - Google Patents

Abstract

Provided is an optical lens assembly, said lens assembly comprising the following, in order from the object side to the image side along the optical axis: a first lens (E1), a second lens (E2), a third lens (E3), a fourth lens (E4), a fifth lens (E5), and a sixth lens (E6). The first lens (E1) has a negative focal power; the second lens (E2) has a focal power; the third lens (E3) has a focal power, and its image side surface (S6) is a convex surface; the fourth lens (E4) has a focal power, and its image side surface (S8) is a concave surface; the fifth lens (E5) has a positive focal power, and its image side surface (S10) is a convex surface; the sixth lens (E6) has a focal power, its object side surface (S11) is a convex surface, and its image side surface (S12) is a concave surface; the combined focal length f23 of the second lens (E2) and third lens (E3) and the total effective focal length f of the optical lens assembly satisfy 0.8 < f23/f < 1.3.

Description

Optical lens group

Cross references to related applications

This application claims the priority and rights of the Chinese patent application with patent application number 201910056968.9 filed with the China National Intellectual Property Office (CNIPA) on January 22, 2019, which is incorporated herein by reference in its entirety.

Technical field

The present application relates to an optical lens group, and more specifically, the present application relates to an optical lens group including six lenses.

Background technique

In recent years, with the development of technology, portable electronic products have gradually emerged. In particular, portable electronic products with high-performance camera functions have become increasingly popular in the market. The photosensitive elements of general optical systems are roughly divided into two types: photosensitive coupling element (CCD) or complementary metal oxide semiconductor element (CMOS). With the advancement of semiconductor manufacturing technology, the pixel size of the chip is getting smaller and smaller, which requires higher and higher imaging quality of the matching optical system.

A lens with a wide-angle feature can take clear shots of a wide range of scenes, and compared with other types of lenses, it has the advantage of obtaining more information under the same conditions (for example, the same focal length). At the same time, there has been increasing interest in lenses with small head sizes in the market.

Summary of the invention

The present application provides an optical lens group suitable for portable electronic products that can at least solve or partially solve at least one of the above-mentioned shortcomings in the prior art, for example, an optical lens group with wide-angle characteristics.

In one aspect, the present application provides such an optical lens group, which includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens in order from the object side to the image side along the optical axis. And the sixth lens. The first lens has negative refractive power; the second lens has refractive power; the third lens has refractive power and its image side is convex; the fourth lens has refractive power and its image side is concave; the fifth lens has positive light For power, the image side is convex; the sixth lens has power, the object side is convex, and the image side is concave. Wherein, the combined focal length f23 of the second lens and the third lens and the total effective focal length f of the optical lens group may satisfy 0.8<f23/f<1.3.

In an embodiment, the effective focal length f1 of the first lens and the total effective focal length f of the optical lens group may satisfy -5<f1/f<-2.5.

In one embodiment, half of the diagonal length of the effective pixel area ImgH on the imaging surface of the optical lens group and the total effective focal length f of the optical lens group can satisfy ImgH/f>1.1.

In one embodiment, the radius of curvature R10 of the image side surface of the fifth lens and the effective focal length f5 of the fifth lens may satisfy -0.7<R10/f5<-0.2.

In one embodiment, the radius of curvature R12 of the image side surface of the sixth lens and the central thickness CT6 of the sixth lens on the optical axis may satisfy 1<R12/CT6<1.5.

In one embodiment, the central thickness CT2 of the second lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis may satisfy 0.1<CT2/CT5<0.6.

In an embodiment, the effective radius DT11 of the object side surface of the first lens and the distance TTL between the object side surface of the first lens and the imaging surface of the optical lens group on the optical axis may satisfy DT11/TTL<0.3.

In one embodiment, the effective radius DT11 of the object side surface of the first lens and the effective radius DT32 of the image side surface of the third lens may satisfy 0.7<DT11/DT32<1.

In one embodiment, the effective radius DT11 of the object side surface of the first lens and the effective radius DT62 of the image side surface of the sixth lens may satisfy 0.2<DT11/DT62<0.5.

In one embodiment, the on-axis distance SAG52 between the intersection of the image side surface and the optical axis of the fifth lens and the maximum effective radius vertex of the image side surface of the fifth lens and the central thickness CT5 of the fifth lens on the optical axis satisfy − 0.8<SAG52/CT5<-0.5.

In one embodiment, the separation distance T23 between the second lens and the third lens on the optical axis, the separation distance T34 between the third lens and the fourth lens on the optical axis and the fourth lens and the fifth lens on the optical axis The separation distance T45 may satisfy 0<(T23+T34)/T45<0.5.

In an embodiment, the sum of the central thickness of the first lens to the sixth lens on the optical axis ΣCT and the separation distance TD from the object side surface of the first lens to the image side surface of the sixth lens on the optical axis may satisfy 0.5 ＜∑CT/TD＜0.9.

In one embodiment, the optical lens group further includes a diaphragm, and the distance SD between the diaphragm and the image side surface of the sixth lens on the optical axis is the same as the distance between the object side surface of the first lens and the imaging surface of the optical lens group on the optical axis. The distance between TTL can satisfy 0.5<SD/TTL<0.8.

In one embodiment, the separation distance Tr3r8 from the object side surface of the second lens to the image side surface of the fourth lens on the optical axis and the separation distance Tr9r12 from the object side surface of the fifth lens to the image side surface of the sixth lens on the optical axis may be It satisfies 0.5<Tr3r8/Tr9r12<1.

In one embodiment, the edge thickness ET2 of the second lens, the edge thickness ET3 of the third lens, the edge thickness ET4 of the fourth lens, and the edge thickness ET5 of the fifth lens may satisfy |ET2-(ET3+ET4+ET5)/ 3|<0.15mm.

On the other hand, the present application provides such an optical lens group, which includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens in order from the object side to the image side along the optical axis. Lens and sixth lens. The first lens has negative refractive power; the second lens has refractive power; the third lens has refractive power and its image side is convex; the fourth lens has refractive power and its image side is concave; the fifth lens has positive light For power, the image side is convex; the sixth lens has power, the object side is convex, and the image side is concave. Wherein, the curvature radius R12 of the image side surface of the sixth lens and the central thickness CT6 of the sixth lens on the optical axis may satisfy 1<R12/CT6<1.5.

This application uses multiple (for example, six) lenses, and the above-mentioned optical lens group has a wide angle by reasonably distributing the refractive power, surface shape, central thickness of each lens, and on-axis distance between each lens, etc. , Small size, small head size, etc. at least one beneficial effect.

Description of the drawings

With reference to the accompanying drawings, through the following detailed description of the non-limiting implementation manners, other features, purposes and advantages of the present application will become more apparent. In the attached picture:

1 shows a schematic diagram of the structure of the optical lens assembly according to Embodiment 1 of the present application; FIGS. 2A to 2D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and chromatic aberration of magnification of the optical lens assembly of Embodiment 1. curve;

3 shows a schematic diagram of the structure of the optical lens assembly according to Embodiment 2 of the present application; FIGS. 4A to 4D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and chromatic aberration of magnification of the optical lens assembly of Embodiment 2. curve;

5 shows a schematic diagram of the structure of the optical lens assembly according to Embodiment 3 of the present application; FIGS. 6A to 6D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and chromatic aberration of magnification of the optical lens assembly of Embodiment 3 curve;

7 shows a schematic diagram of the structure of the optical lens assembly according to Embodiment 4 of the present application; FIGS. 8A to 8D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and chromatic aberration of magnification of the optical lens assembly of Embodiment 4 curve;

9 shows a schematic diagram of the optical lens assembly according to Embodiment 5 of the present application; FIGS. 10A to 10D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and chromatic aberration of magnification of the optical lens assembly of Embodiment 5 curve;

11 shows a schematic diagram of the structure of an optical lens assembly according to Embodiment 6 of the present application; FIGS. 12A to 12D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and chromatic aberration of magnification of the optical lens assembly of Embodiment 6 curve;

FIG. 13 shows a schematic diagram of the structure of the optical lens assembly according to Embodiment 7 of the present application; FIGS. 14A to 14D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and chromatic aberration of magnification of the optical lens assembly of Embodiment 7 curve;

15 shows a schematic structural diagram of an optical lens assembly according to Embodiment 8 of the present application; FIGS. 16A to 16D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and chromatic aberration of magnification of the optical lens assembly of Embodiment 8. curve;

Fig. 17 shows a schematic structural diagram of an optical lens group according to Embodiment 9 of the present application; Figs. 18A to 18D show the axial chromatic aberration curve, astigmatism curve, distortion curve, and chromatic aberration of magnification of the optical lens group of embodiment 9 respectively curve;

FIG. 19 shows a schematic diagram of the structure of the optical lens assembly according to Embodiment 10 of the present application; FIGS. 20A to 20D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and chromatic aberration of magnification of the optical lens assembly of Embodiment 10 curve;

FIG. 21 shows a schematic diagram of the structure of an optical lens group according to Embodiment 11 of the present application; FIGS. 22A to 22D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and chromatic aberration of magnification of the optical lens group of Embodiment 11 curve.

detailed description

In order to better understand the application, various aspects of the application will be described in more detail with reference to the drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in this specification, expressions such as first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any restriction on the feature. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as a second lens or a third lens.

In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for ease of description. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or the aspheric surface is not limited to the shape of the spherical surface or the aspheric surface shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is at least in the paraxial region. Concave. The surface of each lens close to the object side is called the object side of the lens, and the surface of each lens close to the image side is called the image side of the lens.

It should also be understood that the terms "including", "including", "having", "including" and/or "including" when used in this specification mean that the stated features, elements and/or components are present , But does not exclude the presence or addition of one or more other features, elements, components and/or their combinations. In addition, when expressions such as "at least one of" appear after the list of listed features, the entire listed feature is modified instead of individual elements in the list. In addition, when describing the embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as commonly understood by those of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having meanings consistent with their meanings in the context of related technologies, and will not be interpreted in an idealized or excessively formal sense unless This is clearly defined in this article.

It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other if there is no conflict. Hereinafter, the present application will be described in detail with reference to the drawings and in conjunction with embodiments. The features, principles and other aspects of the application will be described in detail below.

The optical lens group according to an exemplary embodiment of the present application may include, for example, six lenses having refractive power, that is, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses are arranged in sequence from the object side to the image side along the optical axis, and each adjacent lens can have an air gap.

In an exemplary embodiment, the first lens may have negative refractive power; the second lens may have positive refractive power or negative refractive power; the third lens may have positive refractive power or negative refractive power, and its image side surface may be convex; The fourth lens has positive refractive power or negative refractive power, and its image side surface can be concave; the fifth lens can have positive refractive power and its image side surface is convex; the sixth lens has positive refractive power or negative refractive power. The side is convex, and the image side is concave. The optical power of the fifth lens is designed to be positive, and the image side surface is designed to be convex, which can effectively correct the aberrations generated by the first lens and improve the system performance.

In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional formula -5<f1/f<-2.5, where f1 is the effective focal length of the first lens, and f is the total effective focal length of the optical lens group. More specifically, f1 and f may further satisfy -4.24≤f1/f≤-2.54.

In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional formula ImgH/f>1.1, where ImgH is half the diagonal length of the effective pixel area on the imaging surface of the optical lens group, and f is the length of the optical lens group. Total effective focal length. More specifically, ImgH and f may further satisfy 1.1<ImgH/f<1.5, for example, 1.20≦ImgH/f≦1.24. Reasonable setting of the ratio of ImgH and f can ensure that the optical lens group has the characteristics of lightness, thinness and wide angle to meet the field of vision requirements of portable electronic products.

In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression 0.8<f23/f<1.3, where f23 is the combined focal length of the second lens and the third lens, and f is the total effective focal length of the optical lens group. More specifically, f23 and f may further satisfy 0.91≤f23/f≤1.21. Reasonably setting the combined focal length of the second lens and the third lens can effectively balance the field curvature of the optical lens group, and at the same time can effectively control the size of the optical lens group to achieve miniaturization.

In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression -0.7<R10/f5<-0.2, where R10 is the radius of curvature of the image side surface of the fifth lens, and f5 is the effective focal length of the fifth lens. More specifically, R10 and f5 may further satisfy -0.55≤R10/f5≤-0.31. Reasonably controlling the curvature radius of the image side surface of the fifth lens can effectively balance the astigmatism of the optical lens group, shorten the back focal length of the lens group, and further ensure the miniaturization of the optical lens group.

In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression 1<R12/CT6<1.5, where R12 is the radius of curvature of the image side surface of the sixth lens, and CT6 is the center of the sixth lens on the optical axis thickness. More specifically, R12 and CT6 may further satisfy 1.32≤R12/CT6≤1.45. Reasonable control of the ratio of the radius of curvature of the image side surface of the sixth lens to the center thickness of the sixth lens on the optical axis can effectively reduce the rear-end size of the lens group, avoid excessive volume of the optical lens group, and also help the lens The assembly and realization of higher space utilization.

In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression 0<(T23+T34)/T45<0.5, where T23 is the separation distance between the second lens and the third lens on the optical axis, and T34 is The distance between the third lens and the fourth lens on the optical axis. T45 is the distance between the fourth lens and the fifth lens on the optical axis. More specifically, T23, T34, and T45 may further satisfy 0.18≤(T23+T34)/T45≤0.45. A reasonable distribution of T23 is the separation distance between the second lens and the third lens on the optical axis plus T34 is the sum of the separation distance between the third lens and the fourth lens on the optical axis and T45 is the fourth lens and the fifth lens. The ratio of the separation distance on the axis provides enough space between the lenses, so that the lens surface changes more freedom, so as to improve the system's ability to correct astigmatism and field curvature.

In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression 0.5<ΣCT/TD<0.9, where ΣCT is the sum of the central thickness of the first lens to the sixth lens on the optical axis, and TD It is the distance between the object side of the first lens and the image side of the sixth lens on the optical axis. More specifically, ΣCT and TD can further satisfy 0.76≤ΣCT/TD≤0.81. Reasonable control of the ratio of ∑CT and TD can make the distance between the lenses in a relatively balanced state, and can improve the space utilization; at the same time, it can also improve the aberration correction ability of the system while ensuring the miniaturization of the lens.

In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional formula 0.1<CT2/CT5<0.6, where CT2 is the central thickness of the second lens on the optical axis, and CT5 is the thickness of the fifth lens on the optical axis. Center thickness. More specifically, CT2 and CT5 may further satisfy 0.20≤CT2/CT5≤0.52. A reasonable distribution of the center thickness of the second lens and the center thickness of the fifth lens can effectively reduce the rear-end size of the system to ensure the miniaturization of the lens, and also facilitate the assembly of the lens.

In an exemplary embodiment, the above-mentioned optical lens group may further include at least one diaphragm to improve the imaging quality of the lens. Alternatively, the diaphragm may be provided between the first lens and the second lens.

In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression 0.5<SD/TTL<0.8, where SD is the separation distance from the diaphragm to the image side surface of the sixth lens on the optical axis, and TTL is the first The distance on the optical axis from the object side of the lens to the imaging surface of the optical lens group. More specifically, SD and TTL can further satisfy 0.63≤SD/TTL≤0.70. Reasonable control of the ratio of SD to TTL helps to appropriately shorten the total length of the optical lens group and meet the requirements of light and thin.

In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression 0.5<Tr3r8/Tr9r12<1, where Tr3r8 is the distance on the optical axis from the object side surface of the second lens to the image side surface of the fourth lens, Tr9r12 is the distance from the object side of the fifth lens to the image side of the sixth lens on the optical axis. More specifically, Tr3r8 and Tr9r12 may further satisfy 0.58≦Tr3r8/Tr9r12≦0.88. Reasonable distribution of the center thickness and on-axis distance of each lens from the second lens to the sixth lens can provide sufficient space between adjacent lenses, thereby increasing the degree of freedom of lens surface changes, thereby improving the system to correct astigmatism And the ability of field music.

In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional formula DT11/TTL<0.3, where DT11 is the effective radius of the object side of the first lens, and TTL is the distance from the object side of the first lens to the optical lens group. The separation distance of the imaging surface on the optical axis. More specifically, DT11 and TTL may further satisfy 0.1<DT11/TTL<0.2, for example, 0.15≦DT11/TTL≦0.18. Reasonable control of the effective radius of the object side of the first lens can effectively reduce the front end size of the lens group, so that the optical lens group has the characteristics of a small head.

In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional formula |ET2-(ET3+ET4+ET5)/3|<0.15mm, where ET2 is the edge thickness of the second lens, and ET3 is the third lens ET4 is the edge thickness of the fourth lens, and ET5 is the edge thickness of the fifth lens. More specifically, ET2, ET3, ET4, and ET5 may further satisfy 0.00mm≦|ET2-(ET3+ET4+ET5)/3|≦0.13mm. Reasonable control of the edge thickness of the second lens, the edge thickness of the third lens, the edge thickness of the fourth lens, and the edge thickness of the fifth lens will help to effectively reduce the total length of the system under the premise of meeting the machinability of the lens. Make the system meet the characteristics of light and thin.

In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression 0.7<DT11/DT32<1, where DT11 is the effective radius of the object side of the first lens, and DT32 is the effective radius of the image side of the third lens . More specifically, DT11 and DT32 may further satisfy 0.79≤DT11/DT32≤0.96. Reasonable control of the ratio of the effective radius of the first lens object side to the effective radius of the third lens image side is helpful to improve the light convergence ability of the optical lens group, adjust the light focus position, shorten the total length of the system, and ensure the compactness of the optical lens group Characteristics.

In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression 0.2<DT11/DT62<0.5, where DT11 is the effective radius of the object side of the first lens, and DT62 is the effective radius of the image side of the sixth lens . More specifically, DT11 and DT62 may further satisfy 0.35≤DT11/DT62≤0.41. Reasonable control of the ratio of the effective radius of the object side surface of the first lens to the effective radius of the image side surface of the sixth lens is helpful to increase the field angle of the optical lens group and achieve wide-angle characteristics. It can also improve the light convergence ability, adjust the light focus position, and shorten the total length of the system.

In an exemplary embodiment, the optical lens group of the present application may satisfy the conditional expression -0.8<SAG52/CT5<-0.5, where SAG52 is the maximum value from the intersection of the image side surface of the fifth lens and the optical axis to the image side surface of the fifth lens. The on-axis distance between the vertices of the effective radius, CT5 is the center thickness of the fifth lens on the optical axis. More specifically, SAG52 and CT5 can further satisfy -0.76≤SAG52/CT5≤-0.61. Reasonable control of the ratio of SAG52 and CT5 can reasonably control the deflection angle of the chief ray, improve the matching degree with the chip, and help adjust the structure of the optical lens group.

Optionally, the above-mentioned optical lens group may further include a filter for correcting color deviation and/or a protective glass for protecting the photosensitive element located on the imaging surface.

The optical lens group according to the above-mentioned embodiment of the present application may use multiple lenses, for example, the above-mentioned six lenses. By reasonably distributing the focal power, surface shape, center thickness of each lens, and the on-axis distance between each lens, it can effectively reduce the size of the lens, reduce the sensitivity of the lens, and improve the workability of the lens. The optical lens group is more conducive to production and processing and can be applied to portable electronic products. The optical lens group configured as described above can also have beneficial effects such as wide-angle, small size, and small head size. In addition, the optical lens group configured above can not only obtain an ideal shooting field of view and a good imaging effect, but also make the subject in a cluttered environment stand out, and has a higher imaging quality than similar products in the shooting angle range. .

In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspheric mirror surface, that is, each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens At least one of the object side surface and the image side surface of the lens is an aspheric mirror surface. The characteristic of an aspheric lens is that the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspheric lens has better curvature radius characteristics, and has the advantages of improving distortion and astigmatism. After adopting an aspheric lens, it is possible to eliminate as much aberration as possible during imaging, thereby improving imaging quality. Optionally, the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are aspheric mirror surfaces.

However, those skilled in the art should understand that without departing from the technical solution claimed in this application, the number of lenses constituting the optical lens group can be changed to obtain the various results and advantages described in this specification. For example, although six lenses have been described as an example in the embodiment, the optical lens group is not limited to including six lenses. If necessary, the optical lens group may also include other numbers of lenses. Specific examples of the optical lens group applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

Example 1

The optical lens assembly according to Embodiment 1 of the present application will be described below with reference to FIGS. 1 to 2D. Fig. 1 shows a schematic structural diagram of an optical lens group according to Embodiment 1 of the present application.

As shown in FIG. 1, the optical lens group according to the exemplary embodiment of the present application includes in order from the object side to the image side along the optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, and a second lens. Four lens E4, fifth lens E5, sixth lens E6, filter E7 and imaging surface S15.

The first lens E1 has a negative refractive power, the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface. The second lens E2 has a positive refractive power, the object side surface S3 is a convex surface, and the image side surface S4 is a convex surface. The third lens E3 has a positive refractive power, the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface. The fourth lens E4 has negative refractive power, the object side surface S7 is convex, and the image side surface S8 is concave. The fifth lens E5 has positive refractive power, the object side surface S9 is concave, and the image side surface S10 is convex. The sixth lens E6 has a negative refractive power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 1 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of Example 1, wherein the units of the radius of curvature and thickness are millimeters (mm).

Table 1

It can be seen from Table 1 that the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. In this embodiment, the surface shape x of each aspheric lens can be defined by but not limited to the following aspheric formula:

Among them, x is the distance vector height of the aspheric surface at a height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (that is, the paraxial curvature c is the above table The reciprocal of the radius of curvature R in 1); k is the conic coefficient (given in Table 1); Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below shows the high-order coefficients A ₄ , A ₆ , A ₈ , A ₁₀ , A ₁₂ , A ₁₄ , A ₁₆ , A ₁₈ and A ₂₀ that can be used for each aspheric mirror surface S1-S12 in Example 1. .

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	4.9080E-01	-8.5780E-01	5.9703E+00	-3.2457E+01	1.2359E+02	-3.0806E+02	4.8225E+02	-4.2792E+02	1.6403E+02
S2	9.6935E-01	-7.4008E+00	1.7051E+02	-2.3507E+03	2.0271E+04	-1.0870E+05	3.5320E+05	-6.3567E+05	4.8691E+05
S3	-3.3679E-03	-5.0008E-01	2.7562E+00	4.4602E+01	-9.4678E+02	7.0207E+03	-2.5523E+04	4.5887E+04	-3.2652E+04
S4	2.7665E-01	-5.6386E+00	4.7927E+01	-3.0542E+02	1.3570E+03	-4.0166E+03	7.5316E+03	-8.0107E+03	3.6432E+03
S5	2.9943E-01	-4.4126E+00	2.5876E+01	-1.0599E+02	3.0315E+02	-5.5955E+02	6.2694E+02	-3.8971E+02	1.0447E+02
S6	2.9190E-01	-2.7206E+00	1.4082E+01	-5.0877E+01	1.2757E+02	-2.0914E+02	2.0689E+02	-1.1007E+02	2.3881E+01
S7	-6.4568E-03	-1.9252E+00	1.1766E+01	-4.3585E+01	1.0630E+02	-1.6633E+02	1.5814E+02	-8.2493E+01	1.8045E+01
S8	-8.6431E-02	-7.3428E-02	1.5648E+00	-6.6710E+00	1.5257E+01	-2.0507E+01	1.6153E+01	-6.8821E+00	1.2212E+00
S9	1.0587E-02	1.6323E-02	-8.2107E-02	8.0422E-01	-2.7488E+00	4.4937E+00	-3.8765E+00	1.7283E+00	-3.1721E-01
S10	-2.8769E-01	5.6791E-01	-1.5992E+00	3.5572E+00	-5.4052E+00	5.4366E+00	-3.4563E+00	1.2542E+00	-1.9582E-01
S11	-1.0859E-01	1.5899E-02	-2.7274E-01	6.1309E-01	-6.9207E-01	4.5773E-01	-1.8062E-01	3.9430E-02	-3.6461E-03
S12	-7.8698E-02	-1.1416E-01	2.0426E-01	-1.7480E-01	9.1575E-02	-3.0600E-02	6.3695E-03	-7.5463E-04	3.8971E-05

Table 2

Table 3 shows the total optical length TTL of the optical lens group in Example 1 (that is, the distance from the center of the object side S1 of the first lens E1 to the imaging surface S15 on the optical axis) and the imaging surface S15 of the optical lens group The effective pixel area is half the diagonal length ImgH, the maximum half-field angle Semi-FOV, the total effective focal length f of the optical lens group, and the effective focal lengths f1 to f6 of each lens.

TTL(mm)	4.48	f2(mm)	2.47
ImgH(mm)	2.41	f3(mm)	7.79
Semi-FOV(°)	51.9	f4(mm)	-4.00
f(mm)	1.94	f5(mm)	1.36
f1(mm)	-8.25	f6(mm)	-1.86

table 3

FIG. 2A shows the axial chromatic aberration curve of the optical lens unit of Example 1, which indicates that the focus points of light of different wavelengths deviate after passing through the lens. 2B shows the astigmatism curve of the optical lens group of Example 1, which represents meridional field curvature and sagittal field curvature. Fig. 2C shows a distortion curve of the optical lens group of Example 1, which represents the magnitude of distortion corresponding to different field angles. FIG. 2D shows the chromatic aberration curve of magnification of the optical lens unit of Example 1, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIGS. 2A to 2D, it can be seen that the optical lens assembly provided in Embodiment 1 can achieve good imaging quality.

Example 2

Hereinafter, the optical lens group according to Embodiment 2 of the present application will be described with reference to FIGS. 3 to 4D. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to those in Embodiment 1 will be omitted. FIG. 3 shows a schematic structural diagram of an optical lens group according to Embodiment 2 of the present application.

As shown in FIG. 3, the optical lens group according to the exemplary embodiment of the present application includes in order from the object side to the image side along the optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, and a second lens. Four lens E4, fifth lens E5, sixth lens E6, filter E7 and imaging surface S15.

The first lens E1 has a negative refractive power, the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface. The second lens E2 has negative refractive power, the object side surface S3 is concave, and the image side surface S4 is convex. The third lens E3 has positive refractive power, the object side surface S5 is convex, and the image side surface S6 is convex. The fourth lens E4 has negative refractive power, the object side surface S7 is convex, and the image side surface S8 is concave. The fifth lens E5 has positive refractive power, the object side surface S9 is concave, and the image side surface S10 is convex. The sixth lens E6 has a negative refractive power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 4 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of Example 2, wherein the units of the radius of curvature and the thickness are millimeters (mm).

Table 4

It can be seen from Table 4 that in Example 2, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 5 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 2, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	5.4435E-01	-7.6902E-01	4.4887E+00	-2.3375E+01	8.5487E+01	-1.9711E+02	2.7343E+02	-2.0671E+02	6.4785E+01
S2	9.0867E-01	-3.1443E+00	4.5817E+01	-4.0839E+02	2.3283E+03	-8.1653E+03	1.6980E+04	-1.8837E+04	8.3864E+03

S3	-1.1352E-02	-8.4646E-01	2.6268E+00	-4.7747E+01	5.7529E+02	-3.5383E+03	1.1442E+04	-1.8250E+04	1.1301E+04
S4	2.0082E-01	-6.4434E+00	3.5422E+01	-1.6339E+02	6.2954E+02	-1.4978E+03	1.4806E+03	6.9119E+02	-1.7659E+03
S5	4.1001E-01	-5.9762E+00	3.1068E+01	-1.3937E+02	5.4351E+02	-1.4321E+03	2.2607E+03	-1.9341E+03	6.9136E+02
S6	2.4015E-01	-7.6926E-01	-6.5678E+00	4.6908E+01	-1.4427E+02	2.6767E+02	-3.0617E+02	1.9535E+02	-5.2494E+01
S7	3.6458E-02	-5.2828E-01	-3.7058E+00	2.0771E+01	-3.8891E+01	3.0573E+01	-3.0739E+00	-9.1068E+00	3.7496E+00
S8	-1.2516E-01	8.3790E-01	-5.2405E+00	1.6313E+01	-2.7884E+01	2.8407E+01	-1.7457E+01	6.0445E+00	-9.1860E-01
S9	4.1197E-02	-1.2020E-01	-1.2263E-01	1.8495E+00	-6.2113E+00	1.0459E+01	-9.3324E+00	4.2328E+00	-7.7343E-01
S10	-2.4302E-01	3.9499E-01	-1.1703E+00	2.8122E+00	-4.4827E+00	4.5693E+00	-2.8781E+00	1.0226E+00	-1.5541E-01
S11	-1.3085E-01	-1.0954E-01	5.5772E-02	2.4917E-01	-5.0760E-01	4.4187E-01	-2.0721E-01	5.1402E-02	-5.2889E-03
S12	-1.6712E-01	4.0358E-02	5.8398E-02	-8.6606E-02	5.6456E-02	-2.1456E-02	4.8842E-03	-6.2008E-04	3.3923E-05

table 5

Table 6 shows the total optical length TTL of the optical lens group in Example 2, the half of the diagonal length of the effective pixel area ImgH on the imaging surface S15 of the optical lens group, the maximum half-field angle Semi-FOV, and the total optical lens group The effective focal length f and the effective focal lengths f1 to f6 of each lens.

TTL(mm)	4.50	f2(mm)	-588.18
ImgH(mm)	2.41	f3(mm)	1.99
Semi-FOV(°)	52.3	f4(mm)	-4.83
f(mm)	1.99	f5(mm)	1.34
f1(mm)	-7.79	f6(mm)	-1.60

Table 6

FIG. 4A shows the axial chromatic aberration curve of the optical lens group of Embodiment 2, which indicates that the focus points of light of different wavelengths deviate after passing through the lens. 4B shows the astigmatism curve of the optical lens group of Example 2, which represents the meridional field curvature and the sagittal field curvature. FIG. 4C shows the distortion curve of the optical lens group of Embodiment 2, which represents the distortion magnitude values corresponding to different field angles. FIG. 4D shows the chromatic aberration curve of magnification of the optical lens unit of Example 2, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIGS. 4A to 4D, it can be seen that the optical lens assembly provided in Embodiment 2 can achieve good imaging quality.

Example 3

The optical lens group according to Embodiment 3 of the present application is described below with reference to FIGS. 5 to 6D. FIG. 5 shows a schematic structural diagram of an optical lens group according to Embodiment 3 of the present application.

As shown in FIG. 5, the optical lens group according to the exemplary embodiment of the present application includes in order from the object side to the image side along the optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, and a second lens. Four lens E4, fifth lens E5, sixth lens E6, filter E7 and imaging surface S15.

The first lens E1 has a negative refractive power, the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface. The second lens E2 has a positive refractive power, the object side surface S3 is a convex surface, and the image side surface S4 is a convex surface. The third lens E3 has negative refractive power, the object side surface S5 is concave, and the image side surface S6 is convex. The fourth lens E4 has negative refractive power, the object side surface S7 is convex, and the image side surface S8 is concave. The fifth lens E5 has positive refractive power, the object side surface S9 is concave, and the image side surface S10 is convex. The sixth lens E6 has a negative refractive power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of Example 3. The units of the radius of curvature and thickness are millimeters (mm).

Table 7

It can be seen from Table 7 that in Example 3, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 8 shows the coefficients of higher-order terms that can be used for each aspherical mirror surface in Embodiment 3, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	4.5692E-01	-2.2390E-01	-3.3064E-01	6.4406E+00	-3.0008E+01	7.8737E+01	-1.2130E+02	1.0389E+02	-3.9358E+01
S2	8.1730E-01	-2.4023E+00	4.9767E+01	-5.6709E+02	4.1736E+03	-1.8946E+04	5.1758E+04	-7.7072E+04	4.8064E+04
S3	-2.0830E-02	-1.1740E+00	2.3890E+01	-3.4175E+02	2.9962E+03	-1.6516E+04	5.5220E+04	-1.0205E+05	8.0309E+04
S4	9.6683E-02	-1.0748E+00	1.4183E+00	-2.8737E+01	3.1653E+02	-1.5396E+03	3.8832E+03	-5.0602E+03	2.7463E+03
S5	2.6893E-01	-1.0409E+00	-7.6131E+00	5.3704E+01	-1.1480E+02	-3.7305E+01	5.3751E+02	-7.8690E+02	3.6777E+02
S6	-9.5685E-02	2.7388E+00	-2.3848E+01	1.0199E+02	-2.4975E+02	3.6044E+02	-2.9824E+02	1.2674E+02	-1.9850E+01
S7	-1.0405E-01	-2.4986E-02	-3.8517E+00	2.2389E+01	-5.7310E+01	8.1943E+01	-6.8770E+01	3.2326E+01	-6.8616E+00
S8	-1.2869E-01	4.2753E-01	-2.1849E+00	7.5182E+00	-1.4812E+01	1.7539E+01	-1.2421E+01	4.8513E+00	-8.0562E-01
S9	5.0143E-02	-2.3685E-01	8.9591E-01	-2.5538E+00	5.0760E+00	-6.6336E+00	5.4303E+00	-2.4769E+00	4.7351E-01
S10	-2.5933E-01	2.6130E-01	-2.7831E-01	2.4627E-01	-1.9167E-01	1.3230E-01	-5.8436E-02	6.5903E-03	3.5647E-03
S11	-1.8737E-01	1.1285E-01	-2.5708E-01	4.6634E-01	-5.4579E-01	3.9930E-01	-1.7738E-01	4.3594E-02	-4.5007E-03
S12	-1.4827E-01	6.6642E-02	-1.0587E-02	-1.6257E-02	1.5505E-02	-6.8324E-03	1.6938E-03	-2.2751E-04	1.2964E-05

Table 8

Table 9 shows the total optical length TTL of the optical lens group in Example 3, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group, the maximum half-field angle Semi-FOV, and the total optical lens group The effective focal length f and the effective focal lengths f1 to f6 of each lens.

TTL(mm)	4.49	f2(mm)	1.87
ImgH(mm)	2.41	f3(mm)	-500.40
Semi-FOV(°)	52.1	f4(mm)	-5.58
f(mm)	1.98	f5(mm)	1.27

f1(mm)

-5.75

f6(mm)

-1.52

Table 9

FIG. 6A shows the axial chromatic aberration curve of the optical lens group of Example 3, which indicates the deviation of the focusing point of light of different wavelengths after passing through the lens. 6B shows the astigmatism curve of the optical lens group of Example 3, which represents meridional field curvature and sagittal field curvature. FIG. 6C shows the distortion curve of the optical lens group of Example 3, which represents the distortion magnitude values corresponding to different field angles. 6D shows the chromatic aberration curve of magnification of the optical lens group of Example 3, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIGS. 6A to 6D, it can be seen that the optical lens set provided in Embodiment 3 can achieve good imaging quality.

Example 4

The optical lens assembly according to Embodiment 4 of the present application is described below with reference to FIGS. 7 to 8D. FIG. 7 shows a schematic structural diagram of an optical lens group according to Embodiment 4 of the present application.

As shown in FIG. 7, the optical lens group according to the exemplary embodiment of the present application includes in order from the object side to the image side along the optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, and a second lens. Four lens E4, fifth lens E5, sixth lens E6, filter E7 and imaging surface S15.

The first lens E1 has a negative refractive power, the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface. The second lens E2 has a positive refractive power, the object side surface S3 is a convex surface, and the image side surface S4 is a convex surface. The third lens E3 has a positive refractive power, the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface. The fourth lens E4 has a positive refractive power, the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface. The fifth lens E5 has positive refractive power, the object side surface S9 is concave, and the image side surface S10 is convex. The sixth lens E6 has a negative refractive power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 10 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of Example 4. The units of the radius of curvature and thickness are millimeters (mm).

Table 10

It can be seen from Table 10 that in Example 4, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 11 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 4, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	3.9316E-01	-1.6422E-01	-4.0117E-01	4.6728E+00	-1.9018E+01	4.5626E+01	-6.5058E+01	5.1291E+01	-1.7305E+01
S2	7.5331E-01	-9.7313E-01	1.9083E+01	-1.3345E+02	2.8826E+02	2.7927E+03	-2.1522E+04	5.8897E+04	-5.8569E+04
S3	4.4726E-02	-2.4021E+00	5.3078E+01	-7.3798E+02	6.3042E+03	-3.3782E+04	1.0998E+05	-1.9792E+05	1.5080E+05
S4	-1.3088E-01	8.2034E-01	-7.7285E+00	1.3778E+01	4.8195E+00	-3.0387E+00	-1.5915E+02	3.4196E+02	-1.8455E+02
S5	2.4381E-02	1.8509E+00	-1.4386E+01	4.9013E+01	-1.5844E+02	4.7065E+02	-8.9711E+02	9.1044E+02	-3.7525E+02
S6	-1.2611E+00	1.0771E+01	-5.5623E+01	2.0727E+02	-5.7368E+02	1.1118E+03	-1.3755E+03	9.5414E+02	-2.7935E+02
S7	-4.1333E-02	-2.3427E+00	1.1972E+01	-3.4424E+01	5.9614E+01	-5.4628E+01	1.3403E+01	1.5443E+01	-9.6092E+00
S8	3.2079E-01	-3.2708E+00	1.2669E+01	-2.9817E+01	4.6455E+01	-4.7598E+01	3.0692E+01	-1.1286E+01	1.8039E+00
S9	-7.4686E-02	9.7234E-01	-4.5594E+00	1.1238E+01	-1.6044E+01	1.3717E+01	-6.6800E+00	1.5736E+00	-1.0405E-01
S10	-3.4933E-01	6.8566E-01	-1.6470E+00	3.0550E+00	-4.0165E+00	3.5008E+00	-1.8439E+00	5.1081E-01	-5.1912E-02
S11	-1.6067E-01	5.5390E-02	-3.9379E-01	9.4453E-01	-1.2447E+00	1.0036E+00	-4.8874E-01	1.3080E-01	-1.4628E-02
S12	-5.4392E-02	-1.1681E-01	1.9594E-01	-1.7160E-01	9.5232E-02	-3.4078E-02	7.5816E-03	-9.5307E-04	5.1774E-05

Table 11

Table 12 shows the total optical length TTL of the optical lens group in Example 4, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group, the maximum half-field angle Semi-FOV, and the total optical lens group The effective focal length f and the effective focal lengths f1 to f6 of each lens.

TTL(mm)	4.50	f2(mm)	2.27
ImgH(mm)	2.41	f3(mm)	1,841.82
Semi-FOV(°)	52.0	f4(mm)	500.01
f(mm)	1.95	f5(mm)	1.09
f1(mm)	-5.45	f6(mm)	-1.17

Table 12

FIG. 8A shows the axial chromatic aberration curve of the optical lens group of Embodiment 4, which indicates that the focus points of light rays of different wavelengths deviate after passing through the lens. FIG. 8B shows the astigmatism curve of the optical lens group of Example 4, which represents meridional field curvature and sagittal field curvature. FIG. 8C shows the distortion curve of the optical lens group of Embodiment 4, which represents the distortion magnitude values corresponding to different field angles. FIG. 8D shows the chromatic aberration curve of magnification of the optical lens group of Example 4, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIGS. 8A to 8D, it can be seen that the optical lens set provided in Embodiment 4 can achieve good imaging quality.

Example 5

The optical lens group according to Embodiment 5 of the present application is described below with reference to FIGS. 9 to 10D. FIG. 9 shows a schematic structural diagram of an optical lens group according to Embodiment 5 of the present application.

As shown in FIG. 9, the optical lens group according to the exemplary embodiment of the present application includes in order from the object side to the image side along the optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, and a second lens. Four lens E4, fifth lens E5, sixth lens E6, filter E7 and imaging surface S15.

The first lens E1 has a negative refractive power, the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface. The second lens E2 has a positive refractive power, the object side surface S3 is a convex surface, and the image side surface S4 is a convex surface. The third lens E3 has a positive refractive power, the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface. The fourth lens E4 has negative refractive power, the object side surface S7 is convex, and the image side surface S8 is concave. The fifth lens E5 has positive refractive power, the object side surface S9 is concave, and the image side surface S10 is convex. The sixth lens E6 has a positive refractive power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of Example 5, wherein the units of the radius of curvature and the thickness are millimeters (mm).

Table 13

It can be seen from Table 13 that in Example 5, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 14 shows the coefficients of the higher-order terms that can be used for each aspheric mirror surface in Embodiment 5, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	4.3966E-01	1.6563E-01	-4.6385E+00	3.4603E+01	-1.4569E+02	3.8448E+02	-6.2469E+02	5.7305E+02	-2.2687E+02
S2	7.7087E-01	1.2768E+00	-4.2513E+01	7.6885E+02	-7.7438E+03	4.7075E+04	-1.6887E+05	3.2881E+05	-2.6635E+05
S3	-2.2452E-02	-1.3409E+00	2.7023E+01	-3.9505E+02	3.6564E+03	-2.1246E+04	7.4438E+04	-1.4227E+05	1.1354E+05
S4	4.6176E-02	3.6141E-01	-1.7538E+01	1.2376E+02	-5.1567E+02	1.6023E+03	-3.7130E+03	5.2813E+03	-3.2051E+03
S5	7.7895E-02	2.8810E-01	-1.2787E+01	5.5281E+01	-2.2764E+01	-4.2139E+02	1.2224E+03	-1.3703E+03	5.5980E+02
S6	-4.5886E-02	1.7170E+00	-1.2028E+01	3.8543E+01	-6.6286E+01	6.3574E+01	-3.6634E+01	1.5811E+01	-4.7652E+00
S7	-2.1682E-01	8.1833E-01	-5.3498E+00	1.9757E+01	-4.1901E+01	5.4690E+01	-4.5061E+01	2.2148E+01	-5.0155E+00
S8	3.9247E-02	-8.9889E-01	3.5922E+00	-8.5300E+00	1.4004E+01	-1.5759E+01	1.1401E+01	-4.6969E+00	8.2418E-01
S9	7.1159E-02	1.4178E-01	-2.1057E+00	7.0498E+00	-1.2663E+01	1.3914E+01	-9.2441E+00	3.4017E+00	-5.3454E-01
S10	-8.7455E-01	3.8135E+00	-1.1040E+01	2.0666E+01	-2.5488E+01	2.0598E+01	-1.0486E+01	3.0511E+00	-3.8589E-01
S11	-2.2651E-01	9.2339E-01	-3.2165E+00	5.5826E+00	-5.7296E+00	3.6508E+00	-1.4211E+00	3.0940E-01	-2.8811E-02
S12	-1.5843E-02	-3.6022E-01	5.4411E-01	-4.3720E-01	2.1836E-01	-6.9746E-02	1.3881E-02	-1.5722E-03	7.7668E-05

Table 14

Table 15 shows the total optical length TTL of the optical lens group in Example 5, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group, the maximum half-field angle Semi-FOV, and the total optical lens group The effective focal length f and the effective focal lengths f1 to f6 of each lens.

TTL(mm)

4.53

f2(mm)

2.37

ImgH(mm)	2.41	f3(mm)	5.84
Semi-FOV(°)	52.0	f4(mm)	-4.52
f(mm)	1.98	f5(mm)	5.00
f1(mm)	-6.65	f6(mm)	31.63

Table 15

FIG. 10A shows the axial chromatic aberration curve of the optical lens group of Example 5, which indicates that the focus points of light rays of different wavelengths deviate after passing through the lens. 10B shows the astigmatism curve of the optical lens group of Example 5, which represents meridional field curvature and sagittal field curvature. FIG. 10C shows the distortion curve of the optical lens group of Embodiment 5, which represents the distortion magnitude values corresponding to different field angles. FIG. 10D shows a chromatic aberration curve of magnification of the optical lens group of Example 5, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIG. 10A to FIG. 10D, it can be seen that the optical lens assembly provided in Embodiment 5 can achieve good imaging quality.

Example 6

The optical lens group according to Embodiment 6 of the present application is described below with reference to FIGS. 11 to 12D. FIG. 11 shows a schematic structural diagram of an optical lens group according to Embodiment 6 of the present application.

As shown in FIG. 11, the optical lens group according to the exemplary embodiment of the present application includes in order from the object side to the image side along the optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, and a second lens. Four lens E4, fifth lens E5, sixth lens E6, filter E7 and imaging surface S15.

The first lens E1 has a negative refractive power, the object side S1 is a concave surface, and the image side S2 is a concave surface. The second lens E2 has a positive refractive power, the object side surface S3 is a convex surface, and the image side surface S4 is a convex surface. The third lens E3 has a positive refractive power, the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface. The fourth lens E4 has negative refractive power, the object side surface S7 is convex, and the image side surface S8 is concave. The fifth lens E5 has positive refractive power, the object side surface S9 is concave, and the image side surface S10 is convex. The sixth lens E6 has a negative refractive power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 16 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of Example 6, wherein the units of the radius of curvature and thickness are millimeters (mm).

Table 16

It can be seen from Table 16 that in Example 6, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 17 shows the coefficients of the higher-order terms that can be used for each aspheric mirror surface in Embodiment 6, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	5.9992E-01	-9.5822E-01	2.5070E+00	-6.1654E+00	1.1589E+01	-1.5353E+01	1.3607E+01	-7.6927E+00	2.1590E+00
S2	9.7462E-01	-2.2987E+00	2.7447E+01	-2.4720E+02	1.5696E+03	-6.4526E+03	1.6563E+04	-2.4093E+04	1.5261E+04
S3	-1.7575E-02	1.5808E-01	-1.1091E+01	1.6122E+02	-1.3192E+03	6.4008E+03	-1.8375E+04	2.8942E+04	-1.9148E+04
S4	1.3996E-01	-2.6731E+00	8.3937E+00	-3.0898E+01	2.4468E+02	-1.2103E+03	2.9661E+03	-3.5296E+03	1.6909E+03
S5	3.6667E-01	-3.1274E+00	5.3691E+00	1.6341E+01	-3.9170E+01	-1.8251E+02	7.2737E+02	-8.8329E+02	3.6112E+02
S6	1.0133E-02	9.9775E-01	-1.1952E+01	5.6504E+01	-1.2989E+02	1.4533E+02	-5.8517E+01	-2.1360E+01	1.9332E+01
S7	-1.1950E-01	1.6327E-01	-6.3292E+00	3.7577E+01	-1.0620E+02	1.7372E+02	-1.7234E+02	9.7942E+01	-2.4758E+01
S8	-1.3703E-01	7.0821E-01	-4.1748E+00	1.4753E+01	-3.0425E+01	3.8177E+01	-2.8910E+01	1.2268E+01	-2.2730E+00
S9	2.9733E-02	-4.7428E-01	2.7533E+00	-9.4603E+00	2.0533E+01	-2.8342E+01	2.4073E+01	-1.1334E+01	2.2415E+00
S10	-2.7120E-01	3.2256E-01	-6.4237E-01	1.3896E+00	-2.2672E+00	2.4107E+00	-1.5551E+00	5.4811E-01	-7.8798E-02
S11	-2.0839E-01	1.4351E-01	-3.5142E-01	7.1435E-01	-9.2703E-01	7.3637E-01	-3.4801E-01	8.9576E-02	-9.6022E-03
S12	-1.9242E-01	1.3054E-01	-6.7708E-02	1.6048E-02	4.2521E-03	-4.5533E-03	1.4760E-03	-2.2865E-04	1.4369E-05

Table 17

Table 18 shows the total optical length TTL of the optical lens group in Example 6, the half of the diagonal length of the effective pixel area ImgH on the imaging surface S15 of the optical lens group, the maximum half-field angle Semi-FOV, and the total optical lens group The effective focal length f and the effective focal lengths f1 to f6 of each lens.

TTL(mm)	4.49	f2(mm)	2.42
ImgH(mm)	2.41	f3(mm)	5.37
Semi-FOV(°)	52.1	f4(mm)	-5.31
f(mm)	1.98	f5(mm)	1.32
f1(mm)	-5.01	f6(mm)	-1.58

Table 18

FIG. 12A shows the axial chromatic aberration curve of the optical lens group of Example 6, which indicates that the focus points of light of different wavelengths deviate after passing through the lens. 12B shows the astigmatism curve of the optical lens group of Example 6, which represents meridional field curvature and sagittal field curvature. FIG. 12C shows the distortion curve of the optical lens group of Example 6, which represents the distortion magnitude values corresponding to different field angles. FIG. 12D shows the chromatic aberration curve of magnification of the optical lens group of Example 6, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIGS. 12A to 12D, it can be seen that the optical lens set provided in Embodiment 6 can achieve good imaging quality.

Example 7

The optical lens group according to Embodiment 7 of the present application is described below with reference to FIGS. 13 to 14D. FIG. 13 shows a schematic structural diagram of an optical lens group according to Embodiment 7 of the present application.

As shown in FIG. 13, the optical lens group according to the exemplary embodiment of the present application includes a first lens E1, a stop STO, a second lens E2, a third lens E3, and a second lens in order from the object side to the image side along the optical axis. Four lens E4, fifth lens E5, sixth lens E6, filter E7 and imaging surface S15.

The first lens E1 has negative refractive power, the object side S1 is concave, and the image side S2 is convex. The second lens E2 has a positive refractive power, the object side surface S3 is convex, and the image side surface S4 is convex. The third lens E3 has a positive refractive power, the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface. The fourth lens E4 has negative refractive power, the object side surface S7 is convex, and the image side surface S8 is concave. The fifth lens E5 has positive refractive power, the object side surface S9 is concave, and the image side surface S10 is convex. The sixth lens E6 has a negative refractive power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 19 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of Example 7, wherein the units of the radius of curvature and the thickness are millimeters (mm).

Table 19

It can be seen from Table 19 that in Example 7, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 20 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 7, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	5.3048E-01	-7.1472E-01	2.2485E+00	-8.5448E+00	2.4285E+01	-4.5497E+01	5.3180E+01	-3.4977E+01	9.7801E+00
S2	1.0891E+00	-2.3090E+00	2.5243E+01	-2.5950E+02	1.8584E+03	-8.3811E+03	2.2954E+04	-3.4838E+04	2.2626E+04
S3	1.1699E-01	-1.3202E+00	1.4846E+01	-1.5564E+02	1.0679E+03	-4.5308E+03	1.1443E+04	-1.5416E+04	8.3652E+03
S4	2.1241E-01	-4.2898E+00	2.5844E+01	-1.4913E+02	7.0278E+02	-2.0397E+03	3.0393E+03	-1.6632E+03	-1.7074E+02
S5	3.9190E-01	-4.2337E+00	1.9353E+01	-7.4139E+01	3.0423E+02	-9.3059E+02	1.6120E+03	-1.3838E+03	4.5238E+02
S6	3.3878E-02	-8.0039E-01	8.2329E+00	-4.7142E+01	1.7432E+02	-3.9312E+02	5.1244E+02	-3.5795E+02	1.0469E+02
S7	-5.3530E-02	-1.3531E+00	7.4530E+00	-2.4403E+01	5.5956E+01	-8.6606E+01	8.2250E+01	-4.2326E+01	8.9778E+00
S8	-4.2073E-02	-3.8335E-01	2.1469E+00	-6.5560E+00	1.3445E+01	-1.8258E+01	1.5482E+01	-7.3124E+00	1.4552E+00
S9	-4.5727E-03	6.2959E-02	-5.1118E-01	2.2841E+00	-5.0686E+00	6.1544E+00	-4.0651E+00	1.3570E+00	-1.7693E-01
S10	-2.3659E-01	1.4054E-01	1.4196E-01	-7.6271E-01	1.3860E+00	-1.3684E+00	7.6401E-01	-2.2485E-01	2.8353E-02
S11	-2.6522E-01	4.2771E-01	-1.0781E+00	1.8015E+00	-1.9163E+00	1.2883E+00	-5.3168E-01	1.2276E-01	-1.2077E-02
S12	-1.2381E-01	9.5903E-03	5.6139E-02	-5.9324E-02	3.1204E-02	-9.6597E-03	1.7608E-03	-1.7333E-04	7.0524E-06

Table 20

Table 21 shows the total optical length TTL of the optical lens group in Example 7, the half of the diagonal length of the effective pixel area ImgH on the imaging surface S15 of the optical lens group, the maximum half-field angle Semi-FOV, and the total optical lens group The effective focal length f and the effective focal lengths f1 to f6 of each lens.

TTL(mm)	4.50	f2(mm)	3.57
ImgH(mm)	2.41	f3(mm)	3.71
Semi-FOV(°)	52.0	f4(mm)	-5.84
f(mm)	2.00	f5(mm)	1.35
f1(mm)	-6.43	f6(mm)	-1.63

Table 21

FIG. 14A shows the axial chromatic aberration curve of the optical lens group of Example 7, which represents the deviation of the focusing point of light of different wavelengths after passing through the lens. 14B shows the astigmatism curve of the optical lens group of Example 7, which represents meridional field curvature and sagittal field curvature. FIG. 14C shows the distortion curve of the optical lens group of Example 7, which represents the distortion magnitude values corresponding to different field angles. FIG. 14D shows the chromatic aberration curve of magnification of the optical lens group of Example 7, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIGS. 14A to 14D, it can be seen that the optical lens set provided in Example 7 can achieve good imaging quality.

Example 8

The optical lens group according to Embodiment 8 of the present application is described below with reference to FIGS. 15 to 16D. FIG. 15 shows a schematic structural diagram of an optical lens group according to Embodiment 8 of the present application.

As shown in FIG. 15, the optical lens group according to the exemplary embodiment of the present application includes a first lens E1, a stop STO, a second lens E2, a third lens E3, and a second lens in order from the object side to the image side along the optical axis. Four lens E4, fifth lens E5, sixth lens E6, filter E7 and imaging surface S15.

The first lens E1 has a negative refractive power, the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface. The second lens E2 has a positive refractive power, the object side surface S3 is a concave surface, and the image side surface S4 is a convex surface. The third lens E3 has a positive refractive power, the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface. The fourth lens E4 has negative refractive power, the object side surface S7 is convex, and the image side surface S8 is concave. The fifth lens E5 has positive refractive power, the object side surface S9 is concave, and the image side surface S10 is convex. The sixth lens E6 has a negative refractive power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 22 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of Example 8, wherein the units of the radius of curvature and thickness are millimeters (mm).

Table 22

It can be seen from Table 22 that in Example 8, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are both aspherical. Table 23 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 8, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	4.1615E-01	2.4126E-01	-4.7755E+00	3.4241E+01	-1.4072E+02	3.6143E+02	-5.6933E+02	5.0591E+02	-1.9516E+02
S2	7.3681E-01	1.4577E+00	-3.7134E+01	6.0089E+02	-5.6268E+03	3.2879E+04	-1.1575E+05	2.2472E+05	-1.8341E+05
S3	-3.2269E-02	-5.2262E-01	6.7307E+00	-1.0274E+02	1.1173E+03	-7.8208E+03	3.1943E+04	-6.8074E+04	5.8625E+04
S4	6.4026E-02	-1.8840E-01	-1.5252E+01	1.5501E+02	-9.0980E+02	3.4557E+03	-8.2532E+03	1.1065E+04	-6.2212E+03
S5	1.7343E-01	-1.3005E+00	3.1560E+00	-3.1892E+01	2.6935E+02	-1.0896E+03	2.2619E+03	-2.3350E+03	9.5093E+02
S6	1.2247E-01	-2.2088E-01	-2.4567E+00	1.0507E+01	-5.1172E+00	-4.5458E+01	1.0308E+02	-8.8093E+01	2.7689E+01
S7	-1.3515E-01	3.0320E-01	-4.3552E+00	1.9690E+01	-4.2573E+01	5.0181E+01	-3.2542E+01	1.0576E+01	-1.2831E+00
S8	-9.5894E-02	3.5422E-01	-1.9099E+00	5.6721E+00	-9.0440E+00	8.0863E+00	-3.8613E+00	7.9428E-01	-1.9033E-02
S9	3.7295E-02	-1.5893E-01	7.1458E-01	-2.3849E+00	4.9487E+00	-6.1818E+00	4.6499E+00	-1.9409E+00	3.4322E-01
S10	-2.2122E-01	1.2934E-01	4.5154E-02	-3.1956E-01	4.7282E-01	-3.6172E-01	1.5549E-01	-3.5568E-02	4.5645E-03
S11	-1.6553E-01	1.8504E-01	-6.1683E-01	1.1201E+00	-1.2202E+00	8.2431E-01	-3.3839E-01	7.7071E-02	-7.4239E-03
S12	-9.9113E-02	-5.3348E-02	1.3082E-01	-1.2121E-01	6.6771E-02	-2.3207E-02	4.9836E-03	-6.0543E-04	3.1950E-05

Table 23

Table 24 shows the total optical length TTL of the optical lens group in Example 8, the half of the diagonal length of the effective pixel area ImgH on the imaging surface S15 of the optical lens group, the maximum half-field angle Semi-FOV, and the total optical lens group The effective focal length f and the effective focal lengths f1 to f6 of each lens.

TTL(mm)	4.50	f2(mm)	2.31
ImgH(mm)	2.41	f3(mm)	8.76
Semi-FOV(°)	52.1	f4(mm)	-4.67
f(mm)	1.97	f5(mm)	1.28
f1(mm)	-7.07	f6(mm)	-1.61

Table 24

FIG. 16A shows the axial chromatic aberration curve of the optical lens group of Example 8, which represents the deviation of the focal point of light rays of different wavelengths after passing through the lens. 16B shows the astigmatism curve of the optical lens group of Example 8, which represents meridional field curvature and sagittal field curvature. FIG. 16C shows the distortion curve of the optical lens group of Example 8, which represents the distortion magnitude values corresponding to different field angles. FIG. 16D shows the chromatic aberration curve of magnification of the optical lens group of Example 8, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIGS. 16A to 16D, it can be seen that the optical lens set provided in Embodiment 8 can achieve good imaging quality.

Example 9

The optical lens group according to Embodiment 9 of the present application is described below with reference to FIGS. 17 to 18D. FIG. 17 shows a schematic structural diagram of an optical lens group according to Embodiment 9 of the present application.

As shown in FIG. 17, the optical lens group according to the exemplary embodiment of the present application includes in order from the object side to the image side along the optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, and a second lens. Four lens E4, fifth lens E5, sixth lens E6, filter E7 and imaging surface S15.

The first lens E1 has a negative refractive power, the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface. The second lens E2 has a positive refractive power, the object side surface S3 is a convex surface, and the image side surface S4 is a concave surface. The third lens E3 has positive refractive power, the object side surface S5 is convex, and the image side surface S6 is convex. The fourth lens E4 has negative refractive power, the object side surface S7 is convex, and the image side surface S8 is concave. The fifth lens E5 has positive refractive power, the object side surface S9 is concave, and the image side surface S10 is convex. The sixth lens E6 has a negative refractive power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 25 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of Example 9, wherein the units of the radius of curvature and the thickness are millimeters (mm).

Table 25

It can be seen from Table 25 that in Example 9, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 26 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 9, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	5.4092E-01	-7.6735E-01	3.5457E+00	-1.6312E+01	5.7838E+01	-1.3754E+02	2.0380E+02	-1.6819E+02	5.8518E+01
S2	9.1047E-01	-2.6208E+00	4.2354E+01	-4.5937E+02	3.3963E+03	-1.6098E+04	4.6982E+04	-7.6608E+04	5.3694E+04
S3	-1.0860E-01	4.5551E+00	-1.3652E+02	2.0929E+03	-1.9655E+04	1.1575E+05	-4.1601E+05	8.3364E+05	-7.1322E+05
S4	4.0279E-02	-3.6035E+00	9.1187E+00	2.4481E+01	-3.9153E+02	2.3398E+03	-7.5038E+03	1.2393E+04	-8.2903E+03
S5	3.1061E-01	-4.5479E+00	2.5724E+01	-1.4304E+02	6.2461E+02	-1.6629E+03	2.5363E+03	-2.0535E+03	6.8491E+02
S6	5.2455E-02	9.1412E-02	-7.8620E+00	4.9737E+01	-1.6698E+02	3.4480E+02	-4.2628E+02	2.8450E+02	-7.8174E+01
S7	1.1109E-01	-1.4733E+00	2.1835E+00	1.4691E+00	-4.7399E+00	-8.1494E-01	8.0064E+00	-6.5237E+00	1.5943E+00
S8	-4.0239E-02	2.0675E-01	-3.0119E+00	1.1967E+01	-2.3956E+01	2.8979E+01	-2.1833E+01	9.4807E+00	-1.8120E+00
S9	-8.9510E-02	9.8217E-01	-4.7690E+00	1.4035E+01	-2.7336E+01	3.4610E+01	-2.6635E+01	1.1204E+01	-1.9725E+00
S10	-2.9264E-01	8.6216E-01	-2.9832E+00	6.9790E+00	-1.0702E+01	1.0594E+01	-6.5154E+00	2.2627E+00	-3.3696E-01
S11	2.0503E-01	-9.0081E-01	1.3357E+00	-1.3622E+00	9.2739E-01	-3.9678E-01	9.3097E-02	-7.2579E-03	-5.9924E-04
S12	6.2277E-02	-2.9122E-01	3.4287E-01	-2.4482E-01	1.1440E-01	-3.5104E-02	6.8176E-03	-7.6120E-04	3.7334E-05

Table 26

Table 27 shows the total optical length TTL of the optical lens group in Example 9, the half of the diagonal length of the effective pixel area ImgH on the imaging surface S15 of the optical lens group, the maximum half-field angle Semi-FOV, and the total optical lens group The effective focal length f and the effective focal lengths f1 to f6 of each lens.

TTL(mm)	4.49	f2(mm)	56.18
ImgH(mm)	2.41	f3(mm)	2.04
Semi-FOV(°)	52.4	f4(mm)	-6.19
f(mm)	2.00	f5(mm)	0.97
f1(mm)	-6.64	f6(mm)	-1.01

Table 27

FIG. 18A shows the axial chromatic aberration curve of the optical lens group of Example 9, which indicates the deviation of the focal point of light rays of different wavelengths after passing through the lens. 18B shows the astigmatism curve of the optical lens group of Example 9, which represents meridional field curvature and sagittal field curvature. FIG. 18C shows the distortion curve of the optical lens group of Example 9, which represents the distortion magnitude values corresponding to different field angles. FIG. 18D shows the chromatic aberration curve of magnification of the optical lens group of Example 9, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIGS. 18A to 18D, it can be seen that the optical lens set provided in Example 9 can achieve good imaging quality.

Example 10

The optical lens group according to Embodiment 10 of the present application is described below with reference to FIGS. 19 to 20D. FIG. 19 shows a schematic structural diagram of an optical lens group according to Embodiment 10 of the present application.

As shown in FIG. 19, the optical lens group according to the exemplary embodiment of the present application includes in order from the object side to the image side along the optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, and a second lens. Four lens E4, fifth lens E5, sixth lens E6, filter E7 and imaging surface S15.

The first lens E1 has a negative refractive power, the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface. The second lens E2 has a positive refractive power, the object side surface S3 is a convex surface, and the image side surface S4 is a convex surface. The third lens E3 has a positive refractive power, the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface. The fourth lens E4 has negative refractive power, the object side surface S7 is concave, and the image side surface S8 is concave. The fifth lens E5 has positive refractive power, the object side surface S9 is concave, and the image side surface S10 is convex. The sixth lens E6 has a negative refractive power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 28 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of Example 10, wherein the units of the radius of curvature and the thickness are millimeters (mm).

Table 28

It can be seen from Table 28 that in Example 10, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 29 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 10, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	4.3888E-01	2.7101E-03	-2.5808E+00	2.2128E+01	-9.8363E+01	2.6634E+02	-4.3445E+02	3.9456E+02	-1.5443E+02
S2	7.7779E-01	-4.7312E-01	4.9049E+00	6.8430E+01	-1.3903E+03	1.1544E+04	-4.9606E+04	1.0977E+05	-9.8054E+04
S3	-3.0676E-02	-2.2171E+00	5.1676E+01	-7.6222E+02	6.8246E+03	-3.7974E+04	1.2756E+05	-2.3639E+05	1.8592E+05
S4	2.8314E-01	-4.7654E+00	3.3428E+01	-1.9441E+02	8.6218E+02	-2.7272E+03	5.5979E+03	-6.6409E+03	3.5054E+03
S5	4.3193E-01	-5.1991E+00	2.9437E+01	-1.3368E+02	4.8631E+02	-1.2770E+03	2.1290E+03	-1.9467E+03	7.3484E+02
S6	5.9260E-01	-4.8579E+00	1.9186E+01	-5.5971E+01	1.4425E+02	-2.9302E+02	3.8542E+02	-2.8008E+02	8.4930E+01
S7	2.5498E-01	-3.2608E+00	1.1197E+01	-2.3163E+01	3.9934E+01	-6.2773E+01	7.2324E+01	-4.7858E+01	1.3203E+01
S8	-4.5088E-02	-1.1833E-01	-3.5237E-01	2.8426E+00	-6.0552E+00	6.5669E+00	-3.9578E+00	1.2629E+00	-1.6956E-01
S9	6.8284E-02	-4.3012E-01	1.6421E+00	-4.7226E+00	9.0143E+00	-1.0656E+01	7.5967E+00	-2.9935E+00	4.9858E-01
S10	-2.2569E-01	1.3707E-01	-7.3124E-02	6.6876E-02	-1.8875E-01	2.8823E-01	-2.0971E-01	7.2466E-02	-7.9489E-03
S11	-1.9145E-01	1.4029E-01	-3.4965E-01	6.4268E-01	-7.5344E-01	5.5124E-01	-2.4358E-01	5.9136E-02	-6.0049E-03
S12	-1.6598E-01	8.4484E-02	-2.4533E-02	-8.5599E-03	1.2826E-02	-6.2140E-03	1.5908E-03	-2.1549E-04	1.2252E-05

Table 29

Table 30 shows the total optical length TTL of the optical lens group in Example 10, the half of the diagonal length of the effective pixel area ImgH on the imaging surface S15 of the optical lens group, the maximum half-field angle Semi-FOV, and the total optical lens group The effective focal length f and the effective focal lengths f1 to f6 of each lens.

TTL(mm)	4.49	f2(mm)	2.16
ImgH(mm)	2.41	f3(mm)	8.26
Semi-FOV(°)	52.2	f4(mm)	-4.01
f(mm)	1.97	f5(mm)	1.31
f1(mm)	-6.21	f6(mm)	-1.65

Table 30

FIG. 20A shows the axial chromatic aberration curve of the optical lens group of Example 10, which indicates the deviation of the focal point of light rays of different wavelengths after passing through the lens. 20B shows the astigmatism curve of the optical lens group of Example 10, which represents meridional field curvature and sagittal field curvature. FIG. 20C shows the distortion curve of the optical lens group of Example 10, which represents the distortion magnitude values corresponding to different field angles. 20D shows the chromatic aberration curve of magnification of the optical lens group of Example 10, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIGS. 20A to 20D, it can be seen that the optical lens set provided in Embodiment 10 can achieve good imaging quality.

Example 11

The optical lens group according to Embodiment 11 of the present application is described below with reference to FIGS. 21 to 22D. FIG. 21 shows a schematic structural diagram of an optical lens group according to Embodiment 11 of the present application.

As shown in FIG. 21, the optical lens group according to the exemplary embodiment of the present application includes in order from the object side to the image side along the optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, and a second lens. Four lens E4, fifth lens E5, sixth lens E6, filter E7 and imaging surface S15.

The first lens E1 has a negative refractive power, the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface. The second lens E2 has a positive refractive power, the object side surface S3 is a convex surface, and the image side surface S4 is a convex surface. The third lens E3 has a positive refractive power, the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface. The fourth lens E4 has negative refractive power, the object side surface S7 is convex, and the image side surface S8 is concave. The fifth lens E5 has a positive refractive power, the object side surface S9 is a convex surface, and the image side surface S10 is a convex surface. The sixth lens E6 has a negative refractive power, the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 31 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical lens group of Example 11. The units of the radius of curvature and thickness are millimeters (mm).

Table 31

It can be seen from Table 31 that in Example 11, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 32 shows the coefficients of the higher-order terms that can be used for each aspheric mirror surface in Embodiment 11, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	4.7699E-01	-2.8968E-01	2.1283E-01	3.9947E+00	-2.2606E+01	6.6854E+01	-1.1493E+02	1.1063E+02	-4.7355E+01
S2	8.0823E-01	-2.1694E+00	3.7499E+01	-3.4840E+02	2.0170E+03	-6.5698E+03	1.0323E+04	-2.0283E+03	-9.4736E+03
S3	-6.9256E-02	-1.4000E+00	3.4329E+01	-5.8480E+02	5.9242E+03	-3.7106E+04	1.3963E+05	-2.8986E+05	2.5542E+05
S4	6.0315E-02	-2.3979E+00	2.0019E+01	-1.7528E+02	1.0874E+03	-4.2732E+03	9.9727E+03	-1.2677E+04	6.8005E+03
S5	3.3151E-01	-2.7611E+00	8.7580E+00	-2.9975E+01	1.5567E+02	-6.0050E+02	1.2249E+03	-1.1843E+03	4.2325E+02
S6	3.9931E-01	-2.2648E+00	3.8831E+00	-5.4934E+00	4.6363E+01	-1.8830E+02	3.3483E+02	-2.7905E+02	9.0197E+01
S7	-3.3913E-03	-9.2136E-01	1.0531E+00	1.9272E+00	1.5130E+00	-2.3921E+01	4.2886E+01	-3.0010E+01	7.0286E+00
S8	-2.1571E-01	1.1922E+00	-5.4226E+00	1.5910E+01	-2.8984E+01	3.3464E+01	-2.4139E+01	9.9998E+00	-1.8271E+00

S9	2.1005E-02	-1.6497E-01	6.0488E-01	-1.0981E+00	1.1983E+00	-7.8407E-01	3.0544E-01	-6.7557E-02	6.8308E-03
S10	-2.5115E-01	3.4672E-01	-6.7062E-01	1.2348E+00	-1.6732E+00	1.5529E+00	-9.1669E-01	3.0699E-01	-4.3645E-02
S11	-2.1510E-01	8.5096E-02	-1.7462E-01	3.8670E-01	-4.9890E-01	3.8000E-01	-1.7181E-01	4.2580E-02	-4.4142E-03
S12	-1.8388E-01	9.5633E-02	-2.0276E-02	-1.7706E-02	1.8435E-02	-8.1525E-03	1.9999E-03	-2.6464E-04	1.4811E-05

Table 32

Table 33 shows the total optical length TTL of the optical lens group in Example 11, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical lens group, the maximum half-field angle Semi-FOV, and the total optical lens group The effective focal length f and the effective focal lengths f1 to f6 of each lens.

TTL(mm)	4.50	f2(mm)	2.23
ImgH(mm)	2.41	f3(mm)	22.96
Semi-FOV(°)	52.0	f4(mm)	-4.78
f(mm)	1.96	f5(mm)	1.25
f1(mm)	-5.74	f6(mm)	-1.52

Table 33

FIG. 22A shows the axial chromatic aberration curve of the optical lens group of Example 11, which represents the deviation of the focal point of light rays of different wavelengths after passing through the lens. 22B shows the astigmatism curve of the optical lens group of Example 11, which represents meridional field curvature and sagittal field curvature. FIG. 22C shows the distortion curve of the optical lens group of Example 11, which represents the distortion magnitude values corresponding to different field angles. 22D shows the chromatic aberration curve of magnification of the optical lens group of Example 11, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIGS. 22A to 22D, it can be seen that the optical lens set provided in Embodiment 11 can achieve good imaging quality.

In summary, Example 1 to Example 11 satisfy the relationships shown in Table 34, respectively.

Table 34

The present application also provides an imaging device, the electronic photosensitive element of which can be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The camera device can be an independent camera device such as a digital camera, or a camera module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the above-described optical lens group.

The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover the technical solutions described above without departing from the inventive concept. Other technical solutions formed by any combination of its equivalent features. For example, the above-mentioned features and the technical features disclosed in this application (but not limited to) with similar functions are mutually replaced to form a technical solution.

Claims (30)

1. The optical lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens in order from the object side to the image side along the optical axis, and is characterized in that:

   The first lens has a negative refractive power;

   The second lens has optical power;

   The third lens has refractive power, and its image side surface is convex;

   The fourth lens has refractive power, and its image side surface is concave;

   The fifth lens has a positive refractive power, and its image side surface is convex;

   The sixth lens has refractive power, the object side surface is convex, and the image side surface is concave; and

   The combined focal length f23 of the second lens and the third lens and the total effective focal length f of the optical lens group satisfy 0.8<f23/f<1.3.
2. The optical lens group according to claim 1, wherein the effective focal length f1 of the first lens and the total effective focal length f of the optical lens group satisfy -5<f1/f<-2.5.
3. The optical lens group according to claim 1, wherein the effective pixel area on the imaging surface of the optical lens group is half of the diagonal length ImgH and the total effective focal length f of the optical lens group satisfies ImgH/f> 1.1.
4. The optical lens assembly of claim 1, wherein the radius of curvature R10 of the image side surface of the fifth lens and the effective focal length f5 of the fifth lens satisfy -0.7<R10/f5<-0.2.
5. The optical lens group according to claim 1, wherein the radius of curvature R12 of the image side surface of the sixth lens and the central thickness CT6 of the sixth lens on the optical axis satisfy 1<R12/CT6< 1.5.
6. The optical lens group according to claim 1, wherein the central thickness CT2 of the second lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis satisfy 0.1<CT2 /CT5<0.6.
7. The optical lens group according to claim 1, wherein the effective radius DT11 of the object side surface of the first lens and the object side surface of the first lens to the imaging surface of the optical lens group are on the optical axis The above separation distance TTL satisfies DT11/TTL<0.3.
8. The optical lens assembly according to claim 1, wherein the effective radius DT11 of the object side surface of the first lens and the effective radius DT32 of the image side surface of the third lens satisfy 0.7<DT11/DT32<1.
9. The optical lens assembly of claim 1, wherein the effective radius DT11 of the object side surface of the first lens and the effective radius DT62 of the image side surface of the sixth lens satisfy 0.2<DT11/DT62<0.5.
10. The optical lens group according to claim 1, wherein the on-axis distance between the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the maximum effective radius of the image side surface of the fifth lens The center thickness CT5 of the SAG52 and the fifth lens on the optical axis satisfies -0.8<SAG52/CT5<-0.5.
11. The optical lens group according to any one of claims 1 to 10, wherein the separation distance T23 between the second lens and the third lens on the optical axis, the third lens and the The separation distance T34 between the fourth lens on the optical axis and the separation distance T45 between the fourth lens and the fifth lens on the optical axis satisfy 0<(T23+T34)/T45<0.5.
12. The optical lens group according to any one of claims 1 to 10, wherein the sum of the central thickness ΣCT of the first lens to the sixth lens on the optical axis and the first lens The distance TD from the object side surface of one lens to the image side surface of the sixth lens on the optical axis satisfies 0.5<ΣCT/TD<0.9.
13. The optical lens group according to any one of claims 1 to 10, wherein the optical lens group further comprises a diaphragm, and the diaphragm to the image side surface of the sixth lens is on the optical axis The separation distance SD and the distance TTL from the object side surface of the first lens to the imaging surface of the optical lens group on the optical axis satisfies 0.5<SD/TTL<0.8.
14. The optical lens assembly according to any one of claims 1 to 10, wherein the separation distance Tr3r8 from the object side surface of the second lens to the image side surface of the fourth lens on the optical axis is equal to the distance Tr3r8 on the optical axis. The separation distance Tr9r12 from the object side surface of the fifth lens to the image side surface of the sixth lens on the optical axis satisfies 0.5<Tr3r8/Tr9r12<1.
15. The optical lens assembly according to any one of claims 1 to 10, wherein the edge thickness ET2 of the second lens, the edge thickness ET3 of the third lens, and the edge thickness ET4 of the fourth lens The edge thickness ET5 of the fifth lens satisfies |ET2-(ET3+ET4+ET5)/3|<0.15mm.
16. The optical lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens in order from the object side to the image side along the optical axis, and is characterized in that:

    The first lens has a negative refractive power;

    The second lens has optical power;

    The third lens has refractive power, and its image side surface is convex;

    The fourth lens has refractive power, and its image side surface is concave;

    The fifth lens has a positive refractive power, and its image side surface is convex;

    The sixth lens has refractive power, the object side surface is convex, and the image side surface is concave; and

    The curvature radius R12 of the image side surface of the sixth lens and the central thickness CT6 of the sixth lens on the optical axis satisfy 1<R12/CT6<1.5.
17. The optical lens group according to claim 16, wherein the effective focal length f1 of the first lens and the total effective focal length f of the optical lens group satisfy -5<f1/f<-2.5.
18. The optical lens group according to claim 17, wherein the combined focal length f23 of the second lens and the third lens and the total effective focal length f of the optical lens group satisfy 0.8<f23/f<1.3.
19. The optical lens group according to claim 16, wherein the effective pixel area on the imaging surface of the optical lens group is half of the diagonal length ImgH and the total effective focal length f of the optical lens group satisfies ImgH/f> 1.1.
20. The optical lens assembly according to claim 16, wherein the radius of curvature R10 of the image side surface of the fifth lens and the effective focal length f5 of the fifth lens satisfy -0.7<R10/f5<-0.2.
21. The optical lens group according to claim 16, wherein the central thickness CT2 of the second lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis satisfy 0.1<CT2 /CT5<0.6.
22. The optical lens group according to claim 16, wherein the effective radius DT11 of the object side surface of the first lens and the object side surface of the first lens to the imaging surface of the optical lens group are on the optical axis The above separation distance TTL satisfies DT11/TTL<0.3.
23. 15. The optical lens assembly of claim 16, wherein the effective radius DT11 of the object side surface of the first lens and the effective radius DT32 of the image side surface of the third lens satisfy 0.7<DT11/DT32<1.
24. The optical lens assembly of claim 16, wherein the effective radius DT11 of the object side surface of the first lens and the effective radius DT62 of the image side surface of the sixth lens satisfy 0.2<DT11/DT62<0.5.
25. The optical lens group according to claim 16, wherein the on-axis distance from the intersection of the image side surface of the fifth lens and the optical axis to the vertex of the maximum effective radius of the image side surface of the fifth lens The center thickness CT5 of the SAG52 and the fifth lens on the optical axis satisfies -0.8<SAG52/CT5<-0.5.
26. The optical lens group according to any one of claims 16 to 25, wherein the separation distance T23 between the second lens and the third lens on the optical axis, the third lens and the The separation distance T34 between the fourth lens on the optical axis and the separation distance T45 between the fourth lens and the fifth lens on the optical axis satisfy 0<(T23+T34)/T45<0.5.
27. The optical lens group according to any one of claims 16 to 25, wherein the sum of the central thickness ΣCT of the first lens to the sixth lens on the optical axis and the first lens The distance TD from the object side surface of one lens to the image side surface of the sixth lens on the optical axis satisfies 0.5<ΣCT/TD<0.9.
28. The optical lens group according to any one of claims 16 to 25, wherein the optical lens group further comprises an aperture, and the image side surface of the aperture to the sixth lens is on the optical axis The separation distance SD and the distance TTL from the object side surface of the first lens to the imaging surface of the optical lens group on the optical axis satisfies 0.5<SD/TTL<0.8.
29. The optical lens group according to any one of claims 16 to 25, wherein the separation distance Tr3r8 from the object side surface of the second lens to the image side surface of the fourth lens on the optical axis is equal to the The separation distance Tr9r12 from the object side surface of the fifth lens to the image side surface of the sixth lens on the optical axis satisfies 0.5<Tr3r8/Tr9r12<1.
30. The optical lens assembly according to any one of claims 16 to 25, wherein the edge thickness ET2 of the second lens, the edge thickness ET3 of the third lens, and the edge thickness ET4 of the fourth lens The edge thickness ET5 of the fifth lens satisfies |ET2-(ET3+ET4+ET5)/3|<0.15mm.

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