CN114114627B

CN114114627B - Optical lens group

Info

Publication number: CN114114627B
Application number: CN202111464916.9A
Authority: CN
Inventors: 李洋; 王浩; 邢天祥; 黄林; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2024-04-19
Anticipated expiration: 2041-12-02
Also published as: CN114114627A

Abstract

The invention provides an optical lens group. The optical lens group includes: the first lens has negative focal power, and the surface of the first lens close to the incident side is a concave surface; the surface of the second lens close to the emergent side is a concave surface; a diaphragm; the fourth lens has negative focal power, and the surface of the fourth lens close to the incident side is a concave surface; the fifth lens has optical power, and the surface of the fifth lens close to the emergent side is a convex surface; the sixth lens has optical power; at least one lens of the first lens to the sixth lens is a glass aspheric lens; the on-axis distance SAG11 between the intersection point of the surface of the first lens close to the incident side and the optical axis and the effective radius vertex of the surface of the first lens close to the incident side and the on-axis distance SAG12 between the intersection point of the surface of the first lens close to the exit side and the optical axis and the effective radius vertex of the surface of the first lens close to the exit side satisfy: -5.0 < (SAG11+SAG12)/(SAG 11-SAG 12) < -2.5. The invention solves the problems that the optical lens group in the prior art has high image quality and the capability of adapting to high and low temperature environments is difficult to realize simultaneously.

Description

Optical lens group

Technical Field

The invention relates to the technical field of optical imaging equipment, in particular to an optical lens group.

Background

Currently, developments in the field of optical imaging are attracting more and more attention. Taking an optical lens group as an example, a traditional optical lens group is generally composed of plastic lenses in order to ensure light weight and low cost, but the plastic lenses have larger chromatic aberration due to less materials, so that the image quality of the final optical lens group is greatly affected, the plastic is easy to deform under high-temperature and low-temperature environments due to the self materials, and the condition of reducing the image quality easily occurs when a mobile phone camera made of the plastic lenses is used for photographing under high temperature or low temperature.

That is, the optical lens group in the prior art has the problem that the high image quality and the capability of adapting to the high and low temperature environment are difficult to realize simultaneously.

Disclosure of Invention

The invention mainly aims to provide an optical lens group so as to solve the problem that the optical lens group in the prior art has high image quality and difficult realization of adapting to high and low temperature environment.

In order to achieve the above object, according to one aspect of the present invention, there is provided an optical lens assembly comprising, in order from a light incident side to a light exit side along an optical axis: the first lens is provided with negative focal power, and the surface of the first lens close to the incident side is a concave surface; the second lens is provided with focal power, and the surface of the second lens close to the emergent side is a concave surface; a diaphragm; a third lens having optical power; the fourth lens is provided with negative focal power, and the surface of the fourth lens close to the incident side is a concave surface; the fifth lens is provided with focal power, and the surface of the fifth lens close to the emergent side is a convex surface; a sixth lens having optical power; wherein at least one of the first lens to the sixth lens is a glass aspheric lens; the on-axis distance SAG11 between the intersection point of the surface of the first lens close to the incident side and the optical axis and the effective radius vertex of the surface of the first lens close to the incident side and the on-axis distance SAG12 between the intersection point of the surface of the first lens close to the exit side and the optical axis and the effective radius vertex of the surface of the first lens close to the exit side satisfy: -5.0 < (SAG11+SAG12)/(SAG 11-SAG 12) < -2.5.

Further, the maximum field angle FOV of the optical lens group satisfies: FOV >120 °.

Further, the effective focal length f of the optical lens group and the entrance pupil diameter EPD of the optical lens group satisfy: f/EPD is less than or equal to 3.0.

Further, the on-axis distance TTL from the surface of the first lens near the incident side to the imaging surface and half of the diagonal length ImgH of the effective pixel region on the imaging surface satisfy: TTL/ImgH is less than or equal to 1.7.

Further, the on-axis distance SAG52 between the center thickness CT5 of the fifth lens on the optical axis and the intersection point of the surface of the fifth lens near the exit side and the optical axis to the effective radius vertex of the surface of the fifth lens near the exit side satisfies: -2.0 < CT5/SAG52 < -1.5.

Further, the curvature radius R11 of the surface of the sixth lens on the incident side and the curvature radius R12 of the surface of the sixth lens on the exit side satisfy: 4.0 < (R11+R12)/(R11-R12) < 7.0.

Further, the center thickness CT5 of the fifth lens on the optical axis and the center thickness CT6 of the sixth lens on the optical axis satisfy: CT5/CT6 is more than 1.0 and less than 2.0.

Further, the air space T12 on the optical axis of the first lens and the second lens, the air space T23 on the optical axis of the second lens and the third lens, the air space T34 on the optical axis of the third lens and the fourth lens, and the air space T45 on the optical axis of the fourth lens and the fifth lens satisfy: 1.5 < (T12+T23)/(T34+T45) < 3.0.

Further, the effective focal length f6 of the sixth lens and the radius of curvature R11 of the surface of the sixth lens near the incident side satisfy: -13.0 < f6/R11 < -5.5.

Further, the center thickness CT1 of the first lens on the optical axis and the center thickness CT3 of the third lens on the optical axis satisfy: CT3/CT1 is more than 1.5 and less than 2.5.

Further, an on-axis distance SAG61 between an intersection point of the edge thickness ET6 of the sixth lens and the surface of the sixth lens near the incident side and the optical axis to an effective radius vertex of the surface of the sixth lens near the incident side satisfies: -3.5 < ET6/SAG61 < -1.5.

According to another aspect of the present invention, there is provided an optical lens assembly comprising, in order from a light incident side to a light exit side along an optical axis: the first lens is provided with negative focal power, and the surface of the first lens close to the incident side is a concave surface; the second lens is provided with focal power, and the surface of the second lens close to the emergent side is a concave surface; a diaphragm; a third lens having optical power; the fourth lens is provided with negative focal power, and the surface of the fourth lens close to the incident side is a concave surface; the fifth lens is provided with focal power, and the surface of the fifth lens close to the emergent side is a convex surface; a sixth lens having optical power; wherein at least one of the first lens to the sixth lens is a glass aspheric lens; the effective focal length f of the optical lens group and the entrance pupil diameter EPD of the optical lens group satisfy: f/EPD is less than or equal to 3.0.

Further, the maximum field angle FOV of the optical lens group satisfies: FOV >120 °; the on-axis distance SAG11 between the intersection point of the surface of the first lens close to the incident side and the optical axis and the effective radius vertex of the surface of the first lens close to the incident side and the on-axis distance SAG12 between the intersection point of the surface of the first lens close to the exit side and the optical axis and the effective radius vertex of the surface of the first lens close to the exit side satisfy: -5.0 < (SAG11+SAG12)/(SAG 11-SAG 12) < -2.5.

By applying the technical scheme of the invention, the optical lens group sequentially comprises a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens and a sixth lens from the light incidence side to the light emergence side along the optical axis, wherein the first lens has negative focal power, and the surface of the first lens close to the incidence side is a concave surface; the second lens has focal power, and the surface of the second lens close to the emergent side is a concave surface; the third lens has optical power; the fourth lens has negative focal power, and the surface of the fourth lens close to the incident side is a concave surface; the fifth lens has optical power, and the surface of the fifth lens close to the emergent side is a convex surface; the sixth lens has optical power; wherein at least one of the first lens to the sixth lens is a glass aspheric lens; the on-axis distance SAG11 between the intersection point of the surface of the first lens close to the incident side and the optical axis and the effective radius vertex of the surface of the first lens close to the incident side and the on-axis distance SAG12 between the intersection point of the surface of the first lens close to the exit side and the optical axis and the effective radius vertex of the surface of the first lens close to the exit side satisfy: -5.0 < (SAG11+SAG12)/(SAG 11-SAG 12) < -2.5.

Through the optical power of each lens of rational distribution, can realize the characteristic of wide angle to the rational distribution of optical power can reduce sensitivity, improves the image quality. At least one lens of the first lens to the sixth lens is a glass aspheric lens, so that the arrangement can reduce aberration, control temperature drift, improve image quality and improve the influence of high-temperature or low-temperature environment on the image quality. By restricting the relation between the on-axis distance SAG11 between the intersection point of the surface of the first lens close to the incident side and the optical axis and the effective radius vertex of the surface of the first lens close to the incident side and the on-axis distance SAG12 between the intersection point of the surface of the first lens close to the exit side and the optical axis and the effective radius vertex of the surface of the first lens close to the exit side to be within a reasonable range, the processing characteristics of the first lens can be ensured, and the assembly is facilitated.

In addition, the optical lens group has the characteristics of wide angle, adaptation to high and low temperature environments, large aperture and ultra-thin. The optical lens group has wider shooting range compared with the common lens due to the characteristic of wide angle; the optical lens group is added with the lenses made of glass materials, so that the imaging quality can be improved, and the optical lens group can adapt to high-low temperature environments; the large aperture can ensure better image quality in a darker environment; the ultrathin optical lens group has smaller overall volume, so that miniaturization is satisfied and the attractiveness is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 is a schematic view showing the structure of an optical lens group according to an example I of the present invention;

FIGS. 2 to 4 show on-axis chromatic aberration curves, astigmatism curves, and magnification chromatic aberration curves, respectively, of the optical lens group of FIG. 1;

FIG. 5 is a schematic view showing the structure of an optical lens assembly according to example II of the present invention;

FIGS. 6 to 8 show on-axis chromatic aberration curves, astigmatism curves, and magnification chromatic aberration curves, respectively, of the optical lens group of FIG. 5;

FIG. 9 is a schematic view showing the structure of an optical lens group according to example III of the present invention;

FIGS. 10 to 12 show on-axis chromatic aberration curves, astigmatism curves, and magnification chromatic aberration curves, respectively, of the optical lens group of FIG. 9;

FIG. 13 is a schematic view showing the structure of an optical lens group according to example IV of the present invention;

FIGS. 14 to 16 show on-axis chromatic aberration curves, astigmatism curves, and magnification chromatic aberration curves, respectively, of the optical lens group of FIG. 13;

FIG. 17 is a schematic view showing the structure of an optical lens group according to example five of the present invention;

fig. 18 to 20 show on-axis chromatic aberration curves, astigmatism curves, and magnification chromatic aberration curves, respectively, of the optical lens group in fig. 17;

FIG. 21 is a schematic view showing the structure of an optical lens group according to example six of the present invention;

Fig. 22 to 24 show on-axis chromatic aberration curves, astigmatism curves, and magnification chromatic aberration curves of the optical lens group in fig. 21, respectively.

Wherein the above figures include the following reference numerals:

E1, a first lens; s1, a surface, close to the incident side, of a first lens; s2, a surface, close to the emergent side, of the first lens; e2, a second lens; s3, a surface, close to the incident side, of the second lens; s4, a surface, close to the emergent side, of the second lens; STO and diaphragm; e3, a third lens; s5, a surface, close to the incident side, of the third lens; s6, a surface, close to the emergent side, of the third lens; e4, a fourth lens; s7, a surface, close to the incident side, of the fourth lens; s8, a surface, close to the emergent side, of the fourth lens; e5, a fifth lens; s9, a surface, close to the incident side, of the fifth lens; s10, a surface, close to the emergent side, of the fifth lens; e6, a sixth lens; s11, a surface, close to the incident side, of the sixth lens; s12, a surface, close to the emergent side, of the sixth lens; e7, an optical filter; s13, a surface of the optical filter, which is close to the incident side; s14, a surface, close to the emergent side, of the optical filter; s15, an imaging surface.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.

In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present invention.

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

In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for convenience of explanation. Specifically, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale.

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the light incident side becomes the surface of the lens close to the incident side, and the surface of each lens close to the light emitting side is called the surface of the lens close to the emitting side. The determination of the surface shape in the paraxial region can be performed by a determination method by a person skilled in the art by positive or negative determination of the concave-convex with R value (R means the radius of curvature of the paraxial region, and generally means the R value on a lens database (lens data) in optical software). The surface near the incident side is judged to be convex when the R value is positive, and is judged to be concave when the R value is negative; the surface near the emission side is determined to be concave when the R value is positive, and is determined to be convex when the R value is negative.

The invention provides an optical lens group, which aims to solve the problem that the optical lens group in the prior art has high image quality and difficult realization of the capability of adapting to high and low temperature environments.

Example 1

As shown in fig. 1 to 24, the optical lens group sequentially includes, along an optical axis, a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens, and a sixth lens from a light incident side to a light emergent side, where the first lens has negative optical power, and a surface of the first lens near the incident side is a concave surface; the second lens has focal power, and the surface of the second lens close to the emergent side is a concave surface; the third lens has optical power; the fourth lens has negative focal power, and the surface of the fourth lens close to the incident side is a concave surface; the fifth lens has optical power, and the surface of the fifth lens close to the emergent side is a convex surface; the sixth lens has optical power; wherein at least one of the first lens to the sixth lens is a glass aspheric lens; the on-axis distance SAG11 between the intersection point of the surface of the first lens close to the incident side and the optical axis and the effective radius vertex of the surface of the first lens close to the incident side and the on-axis distance SAG12 between the intersection point of the surface of the first lens close to the exit side and the optical axis and the effective radius vertex of the surface of the first lens close to the exit side satisfy: -5.0 < (SAG11+SAG12)/(SAG 11-SAG 12) < -2.5.

Preferably, -4.7 < (SAG11+SAG12)/(SAG 11-SAG 12) < -2.8.

In the present embodiment, the maximum field angle FOV of the optical lens group satisfies: FOV >120 °. The maximum field angle FOV of the optical lens group is reasonably restrained within a certain range, so that the characteristics of large field angle can be met, and the obtained object information can be effectively enlarged. Preferably, FOV >121 °.

In the present embodiment, the effective focal length f of the optical lens group and the entrance pupil diameter EPD of the optical lens group satisfy: f/EPD is less than or equal to 3.0. The ratio between the effective focal length f of the optical lens group and the entrance pupil diameter EPD of the optical lens group is controlled within a reasonable range, so that the characteristic of a large aperture is realized, and the optical lens group can have better imaging quality in a dark light environment.

In this embodiment, the on-axis distance TTL from the surface of the first lens near the incident side to the imaging surface and half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy: TTL/ImgH is less than or equal to 1.7. The ratio between the axial distance TTL from the surface of the first lens close to the incident side to the imaging surface and half of the diagonal line length of the effective pixel area on the imaging surface is controlled to be in a reasonable range, so that the volume of the optical lens group is favorably compressed, the miniaturization is ensured, and the appearance attractiveness of the mobile phone lens is favorably improved.

In the present embodiment, the on-axis distance SAG52 between the center thickness CT5 of the fifth lens on the optical axis and the intersection point of the surface of the fifth lens near the exit side and the optical axis to the effective radius vertex of the surface of the fifth lens near the exit side satisfies: -2.0 < CT5/SAG52 < -1.5. The center thickness of the fifth lens can be ensured to be in a reasonable range by meeting the conditional expression, and the molding and processing characteristics of the fifth lens can be effectively improved. Preferably, -1.9 < CT5/SAG52 < -1.5.

In the present embodiment, the curvature radius R11 of the surface of the sixth lens on the incident side and the curvature radius R12 of the surface of the sixth lens on the exit side satisfy: 4.0 < (R11+R12)/(R11-R12) < 7.0. The condition is satisfied, which is favorable for ensuring the curvature and focal power of the sixth lens, and is favorable for improving the processability of the sixth lens, and in addition, the aberration can be reduced. Preferably, 4.4 < (R11+R12)/(R11-R12) < 6.5.

In the present embodiment, the center thickness CT5 of the fifth lens on the optical axis and the center thickness CT6 of the sixth lens on the optical axis satisfy: CT5/CT6 is more than 1.0 and less than 2.0. The ratio between the center thickness CT5 of the fifth lens on the optical axis and the center thickness CT6 of the sixth lens on the optical axis is restrained within a reasonable range, so that the center thicknesses of the fifth lens and the sixth lens are reasonably distributed, aberration is reduced, and assemblability is improved. Preferably, 1.4 < CT5/CT6 < 1.9.

In the present embodiment, the air space T12 on the optical axis of the first lens and the second lens, the air space T23 on the optical axis of the second lens and the third lens, the air space T34 on the optical axis of the third lens and the fourth lens, and the air space T45 on the optical axis of the fourth lens and the fifth lens satisfy: 1.5 < (T12+T23)/(T34+T45) < 3.0. The method meets the condition, avoids overlarge deflection of light rays during transmission among lenses, and reduces the processing difficulty of the optical lens group. Preferably, 1.5 < (T12+T23)/(T34+T45) < 2.7.

In the present embodiment, the effective focal length f6 of the sixth lens and the radius of curvature R11 of the surface of the sixth lens near the incident side satisfy: -13.0 < f6/R11 < -5.5. The method meets the conditional expression, is favorable for reasonably controlling the bending degree of the sixth lens, and ensures that the sixth lens has better processing and forming characteristics. Preferably, -12.9 < f6/R11 < -5.6.

In the present embodiment, the central thickness CT1 of the first lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy: CT3/CT1 is more than 1.5 and less than 2.5. The method meets the conditional expression, is favorable for reasonably distributing the center thicknesses of the first lens and the third lens, and improves the assembly property of the lenses while reducing the aberration. Preferably, 1.8 < CT3/CT1 < 2.3.

In the present embodiment, the on-axis distance SAG61 between the intersection point of the edge thickness ET6 of the sixth lens and the plane of the sixth lens near the incident side and the optical axis to the effective radius vertex of the plane of the sixth lens near the incident side satisfies: -3.5 < ET6/SAG61 < -1.5. The ratio of the edge thickness ET6 of the sixth lens to the on-axis distance SAG61 between the intersection point of the surface of the sixth lens near the incident side and the optical axis and the effective radius vertex of the surface of the sixth lens near the incident side is constrained within a reasonable range, which is favorable for ensuring the edge thickness of the sixth lens, and can improve the molding processability of the sixth lens. Preferably, -3.1 < ET6/SAG61 < -1.9.

Example two

As shown in fig. 1 to 24, the optical lens group sequentially includes, along an optical axis, a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens, and a sixth lens from a light incident side to a light emergent side, where the first lens has negative optical power, and a surface of the first lens near the incident side is a concave surface; the second lens has focal power, and the surface of the second lens close to the emergent side is a concave surface; the third lens has optical power; the fourth lens has negative focal power, and the surface of the fourth lens close to the incident side is a concave surface; the fifth lens has optical power, and the surface of the fifth lens close to the emergent side is a convex surface; the sixth lens has optical power; wherein at least one of the first lens to the sixth lens is a glass aspheric lens; the effective focal length f of the optical lens group and the entrance pupil diameter EPD of the optical lens group satisfy: f/EPD is less than or equal to 3.0.

Through the optical power of each lens of rational distribution, can realize the characteristic of wide angle to the rational distribution of optical power can reduce sensitivity, improves the image quality. At least one lens of the first lens to the sixth lens is a glass aspheric lens, so that the arrangement can reduce aberration, control temperature drift, improve image quality and improve the influence of high-temperature or low-temperature environment on the image quality. The ratio between the effective focal length f of the optical lens group and the entrance pupil diameter EPD of the optical lens group is limited in a reasonable range, so that the characteristic of a large aperture is realized, and the optical lens group can have better imaging quality in a dark light environment.

In the present embodiment, an on-axis distance SAG11 between an intersection point of a face of the first lens near the incident side and the optical axis to an effective radius vertex of the face of the first lens near the incident side and an on-axis distance SAG12 between an intersection point of a face of the first lens near the exit side and the optical axis to an effective radius vertex of the face of the first lens near the exit side satisfy: -5.0 < (SAG11+SAG12)/(SAG 11-SAG 12) < -2.5. By restricting the relation between the on-axis distance SAG11 between the intersection point of the surface of the first lens close to the incident side and the optical axis and the effective radius vertex of the surface of the first lens close to the incident side and the on-axis distance SAG12 between the intersection point of the surface of the first lens close to the exit side and the optical axis and the effective radius vertex of the surface of the first lens close to the exit side to be within a reasonable range, the processing characteristics of the first lens can be ensured, and the assembly is facilitated. Preferably, -4.7 < (SAG11+SAG12)/(SAG 11-SAG 12) < -2.8.

The optical lens set may optionally further include a filter for correcting color deviation or a protective glass for protecting a photosensitive element located on the imaging surface.

The optical lens group in the present application may employ a plurality of lenses, for example, the six lenses described above. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial distance between each lens and the like of each lens, the sensitivity of the lens can be effectively reduced, the machinability of the lens can be improved, and the optical lens group is more beneficial to production and machining and can be suitable for portable electronic equipment such as smart phones and the like. The left side is the light incident side, and the right side is the light emergent side.

In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspherical lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality.

However, those skilled in the art will appreciate that the number of lenses making up an optical lens set can be varied to achieve the various results and advantages described in this specification without departing from the scope of the application as claimed. For example, although six lenses are described as an example in the embodiment, the optical lens group is not limited to include six lenses. The optical lens set may also include other numbers of lenses, if desired.

Examples of specific surface patterns and parameters applicable to the optical lens group of the above embodiment are further described below with reference to the drawings.

Any of the following examples one to six is applicable to all embodiments of the present application.

Example one

As shown in fig. 1 to 4, an optical lens group according to an example one of the present application is described. Fig. 1 is a schematic view showing the structure of an optical lens group of example one.

As shown in fig. 1, the optical lens assembly sequentially includes, from a light incident side to a light emitting side: the optical system comprises a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, an optical filter E7 and an imaging surface S15.

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

In this example, the total effective focal length f of the optical lens group is 2.05mm, the half of the maximum field angle Semi-FOV of the optical lens group is 61.8 °, the total length TTL of the optical lens group is 5.05mm and the image height ImgH is 3.03mm.

Table 1 shows the basic structural parameters of the optical lens group of example one, in which the units of radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 1

In the first example, the surface of any one of the first lens E1 to the sixth lens E6 near the incident side and the surface near the exit side are both aspheric, and the surface shape of each aspheric lens can be defined by, but not limited to, the following aspheric formula:

Wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the aspherical i-th order. The following Table 2 shows the higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 that can be used for each of the aspherical mirrors S1-S12 in example one.

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

8.9364E-01

-1.4797E-01

2.8872E-02

-9.6501E-03

3.0961E-03

-1.0959E-03

3.2739E-04

-9.9057E-05

2.1387E-05

S2

5.0096E-01

-8.9718E-02

-1.1365E-03

-6.9407E-04

2.2205E-03

-8.8698E-05

-1.9926E-04

-3.4722E-05

2.7548E-05

S3

4.3689E-02

-2.1987E-02

2.0803E-03

6.3655E-05

4.5246E-04

-1.5062E-04

1.8019E-05

0.0000E+00

S4

1.4852E-02

1.3232E-04

7.5030E-04

1.6690E-04

6.2853E-05

-7.1882E-06

1.0186E-05

0.0000E+00

S5

-2.1849E-03

-2.3466E-03

-5.1875E-04

-1.5021E-04

-3.8812E-05

-1.0345E-05

-1.4429E-06

-1.6421E-07

9.4738E-08

S6

-1.1314E-01

-6.3511E-03

-2.3092E-03

-1.1127E-03

-5.2427E-04

-8.7458E-05

-2.1781E-05

1.8572E-06

-1.4335E-06

S7

-1.9114E-01

1.5111E-02

2.8279E-03

1.6281E-03

-3.0246E-04

2.0062E-04

5.5698E-05

3.9308E-05

-1.2865E-05

S8

-1.4158E-01

3.2242E-02

-2.5426E-03

2.6445E-03

-6.1386E-04

2.2286E-04

-2.7028E-05

4.2223E-05

3.6270E-06

S9

-3.0123E-02

1.0808E-02

-1.1387E-02

5.5626E-04

-7.9652E-04

-2.9533E-04

-6.4998E-05

-3.7445E-05

-2.8253E-05

S10

5.3446E-01

1.3221E-01

-3.3027E-02

6.0594E-04

8.4229E-04

1.8121E-03

-1.2245E-03

6.2759E-04

-6.8633E-05

S11

-1.0012E+00

2.2638E-01

-7.6365E-03

-2.9300E-03

-7.5628E-03

-1.2911E-03

1.6446E-03

6.1984E-04

-9.9036E-04

S12

-1.5391E+00

2.1308E-01

-7.4379E-02

3.7212E-02

-8.5156E-03

-6.7627E-07

-2.1883E-03

-9.6249E-04

-5.3389E-04

TABLE 2

Fig. 2 shows an on-axis chromatic aberration curve for an optical lens set of example one, which represents the deviation of the converging focus of light rays of different wavelengths after passing through the optical lens set. Fig. 3 shows an astigmatism curve of the optical lens group of example one, which represents meridional image surface curvature and sagittal image surface curvature. Fig. 4 shows a chromatic aberration of magnification curve of an optical lens group of example one, which represents the deviation of different image heights on an imaging plane after light passes through the optical lens group.

As can be seen from fig. 2 to fig. 4, the optical lens set of example one can achieve good imaging quality.

Example two

As shown in fig. 5 to 8, an optical lens group of example two of the present application is described. In this example and the following examples, a description of portions similar to those of example one will be omitted for the sake of brevity. Fig. 5 shows a schematic diagram of the structure of an optical lens group of example two.

As shown in fig. 5, the optical lens assembly sequentially includes, from a light incident side to a light emitting side: the optical system comprises a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, an optical filter E7 and an imaging surface S15.

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

In this example, the total effective focal length f of the optical lens group is 1.89mm, the half of the maximum field angle Semi-FOV of the optical lens group is 63.0 °, the total length TTL of the optical lens group is 5.00mm and the image height ImgH is 3.03mm.

Table 3 shows the basic structural parameters of the optical lens group of example two, in which the units of radius of curvature, thickness/distance, focal length and effective radius are all millimeters (mm).

TABLE 3 Table 3

Table 4 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example two, where each of the aspherical surface types can be defined by equation (1) given in example one above.

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

7.6870E-01

-1.4949E-01

3.5253E-02

-1.0898E-02

3.6350E-03

-1.3642E-03

5.0568E-04

-1.6864E-04

3.1443E-05

S2

4.0583E-01

-8.4718E-02

6.5820E-03

1.3765E-03

1.3878E-03

-4.9671E-04

-1.4918E-04

0.0000E+00

S3

6.0465E-02

-1.0973E-03

9.5028E-03

3.1635E-03

2.3497E-04

-4.8000E-04

-1.2786E-04

0.0000E+00

S4

4.9092E-02

7.2094E-03

2.7388E-03

7.7402E-04

1.3346E-04

0.0000E+00

S5

7.9844E-03

-8.9730E-04

-4.5019E-06

1.2363E-04

6.9901E-05

2.7761E-05

5.0166E-06

9.8979E-08

0.0000E+00

S6

-1.3913E-01

-4.6447E-03

1.6452E-03

4.1007E-04

0.0000E+00

S7

-1.9618E-01

7.9981E-03

5.4612E-03

1.3756E-03

-2.1123E-04

-1.2981E-04

-4.7877E-05

-2.8323E-05

-2.7969E-05

S8

-1.0153E-01

1.7318E-02

3.4440E-03

9.5679E-05

5.7083E-04

-2.4553E-04

1.0731E-04

0.0000E+00

S9

5.1254E-02

-1.3431E-02

1.5587E-03

-2.6962E-03

1.1420E-03

-7.3380E-04

1.7772E-04

-5.1087E-05

0.0000E+00

S10

3.2825E-01

1.3216E-01

3.3157E-03

4.2236E-03

3.7922E-03

2.5635E-03

6.8429E-04

4.8281E-04

4.0578E-04

S11

-1.7923E+00

2.7423E-01

-1.4763E-02

1.4442E-02

-8.6275E-03

-4.4520E-03

1.0145E-03

2.5858E-03

9.7260E-04

S12

-3.2034E+00

4.4622E-01

-1.4578E-01

4.9956E-02

-7.2614E-03

4.8050E-03

-1.1089E-04

1.5935E-04

-9.8034E-05

TABLE 4 Table 4

Fig. 6 shows an on-axis chromatic aberration curve for an optical lens set of example two, which represents the deviation of the converging focus of light rays of different wavelengths after passing through the optical lens set. Fig. 7 shows an astigmatism curve of the optical lens group of example two, which represents meridional image surface curvature and sagittal image surface curvature. Fig. 8 shows a chromatic aberration of magnification curve of the optical lens group of example two, which represents the deviation of different image heights on the imaging plane after the light passes through the optical lens group.

As can be seen from fig. 6 to 8, the optical lens set of example two can achieve good imaging quality.

Example three

As shown in fig. 9 to 12, an optical lens group of example three of the present application is described. Fig. 9 shows a schematic diagram of the structure of an optical lens group of example three.

As shown in fig. 9, the optical lens assembly sequentially includes, from a light incident side to a light emitting side: the optical system comprises a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, an optical filter E7 and an imaging surface S15.

In this example, the total effective focal length f of the optical lens group is 1.87mm, the half of the maximum field angle Semi-FOV of the optical lens group is 63.5 °, the total length TTL of the optical lens group is 5.05mm and the image height ImgH is 3.03mm.

Table 5 shows the basic structural parameters of the optical lens group of example three, in which the units of radius of curvature, thickness/distance, focal length, and effective radius are millimeters (mm).

TABLE 5

Table 6 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example three, where each of the aspherical surface types can be defined by the formula (1) given in example one above.

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

7.5422E-01

-1.4799E-01

3.5595E-02

-1.0780E-02

3.6754E-03

-1.3637E-03

5.1201E-04

-1.6263E-04

2.8617E-05

S2

3.8843E-01

-8.1717E-02

6.2027E-03

9.7975E-04

1.3512E-03

-3.5288E-04

-6.5528E-05

0.0000E+00

S3

5.7529E-02

5.0897E-04

9.3156E-03

3.2521E-03

2.3439E-04

-4.7217E-04

-1.5190E-04

0.0000E+00

S4

5.0383E-02

7.1057E-03

2.6809E-03

7.6341E-04

1.4074E-04

0.0000E+00

S5

8.1951E-03

-9.1092E-04

-2.0977E-05

1.2527E-04

7.3131E-05

2.9920E-05

5.7042E-06

7.0178E-07

0.0000E+00

S6

-1.4334E-01

-5.0004E-03

1.6152E-03

4.1796E-04

0.0000E+00

S7

-2.0058E-01

7.2121E-03

5.6134E-03

1.4799E-03

-1.5088E-04

-1.4946E-04

-5.9061E-05

-3.7889E-05

-3.0561E-05

S8

-9.7913E-02

1.5132E-02

4.0462E-03

-1.2882E-04

7.0131E-04

-2.8392E-04

1.2677E-04

0.0000E+00

S9

6.4714E-02

-1.7253E-02

2.9471E-03

-3.1585E-03

1.3569E-03

-8.1811E-04

2.0373E-04

-5.8145E-05

0.0000E+00

S10

6.2669E-02

5.9957E-02

-1.3546E-02

-6.0952E-03

4.9443E-04

7.3739E-05

-3.5310E-04

-1.7607E-04

1.1139E-04

S11

-1.7046E+00

2.4767E-01

-5.4356E-03

1.0546E-02

-6.1029E-03

-6.1088E-03

1.4805E-03

2.4458E-03

1.2275E-03

S12

-3.1379E+00

4.2968E-01

-1.4023E-01

4.6006E-02

-4.7315E-03

3.6110E-03

6.5200E-04

-3.2073E-04

1.1388E-04

TABLE 6

Fig. 10 shows an on-axis chromatic aberration curve for the optical lens set of example three, which represents the deviation of the converging focus of light rays of different wavelengths after passing through the optical lens set. Fig. 11 shows an astigmatism curve of the optical lens group of example three, which represents meridional image surface curvature and sagittal image surface curvature. Fig. 12 shows a chromatic aberration of magnification curve of the optical lens group of example three, which represents the deviation of different image heights on the imaging plane after light passes through the optical lens group.

As can be seen from fig. 10 to 12, the optical lens set of example three can achieve good imaging quality.

Example four

As shown in fig. 13 to 16, an optical lens group of example four of the present application is described. Fig. 13 shows a schematic view of the structure of an optical lens group of example four.

As shown in fig. 13, the optical lens assembly sequentially includes, from a light incident side to a light emitting side: the optical system comprises a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, an optical filter E7 and an imaging surface S15.

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

In this example, the total effective focal length f of the optical lens group is 1.91mm, the half of the maximum field angle Semi-FOV of the optical lens group is 61.4 °, the total length TTL of the optical lens group is 5.20mm and the image height ImgH is 3.09mm.

Table 7 shows a basic structural parameter table of the optical lens group of example four, in which the units of radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 7

Table 8 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example four, where each of the aspherical surface types can be defined by the formula (1) given in example one above.

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

4.3124E-01

-8.2836E-02

1.7448E-02

-4.7424E-03

1.3856E-03

-3.6909E-04

6.7245E-05

0.0000E+00

S2

3.3608E-01

-5.0667E-02

4.5524E-04

-1.4715E-03

7.3346E-04

1.5185E-04

4.6469E-05

0.0000E+00

S3

1.9105E-02

-8.5336E-03

-1.0715E-03

-3.6293E-04

1.6024E-04

5.6848E-05

2.3396E-05

0.0000E+00

S4

2.1363E-02

-7.3760E-05

-1.3226E-04

-5.1112E-05

1.9953E-05

1.7040E-06

2.8736E-06

0.0000E+00

S5

2.4834E-03

-9.2070E-04

-2.2049E-04

-4.9656E-05

-1.2211E-05

-3.8656E-06

-1.3039E-06

-4.1163E-07

1.0117E-06

S6

-1.0080E-01

-1.0715E-02

-1.3727E-03

-5.6573E-05

-1.4385E-04

-2.9935E-05

1.2464E-05

-2.6805E-05

5.4145E-06

S7

-1.8066E-01

-1.3518E-03

-3.9137E-03

1.4306E-03

-2.2318E-04

1.4196E-04

2.3425E-05

2.9128E-05

-1.0894E-05

S8

-1.6093E-01

2.4767E-02

-4.6600E-03

2.5519E-03

-5.2481E-04

1.2313E-04

4.5023E-05

-6.7785E-06

-5.3668E-06

S9

-6.4988E-02

1.5157E-02

-1.0374E-02

1.5664E-03

-6.3780E-04

1.2186E-04

1.5929E-04

-3.9417E-05

1.8547E-05

S10

5.3056E-01

1.2420E-01

-2.6061E-02

3.2971E-03

-6.1746E-04

2.5628E-03

-1.0217E-03

6.0661E-04

-2.9701E-04

S11

-1.0212E+00

2.1086E-01

1.7445E-03

3.0577E-04

-9.0651E-03

-1.2936E-03

1.7953E-03

1.0516E-03

-8.2950E-04

S12

-1.6074E+00

2.2398E-01

-8.1497E-02

3.6109E-02

-8.4041E-03

3.6673E-03

-1.7608E-03

2.1229E-04

-1.0424E-03

TABLE 8

Fig. 14 shows an on-axis chromatic aberration curve for the optical lens set of example four, which represents the deviation of the converging focus of light rays of different wavelengths after passing through the optical lens set. Fig. 15 shows an astigmatism curve of the optical lens group of example four, which represents meridional image surface curvature and sagittal image surface curvature. Fig. 16 shows a magnification chromatic aberration curve of the optical lens group of example four, which represents the deviation of different image heights on the imaging plane after light passes through the optical lens group.

As can be seen from fig. 14 to 16, the optical lens set provided in example four can achieve good imaging quality.

Example five

As shown in fig. 17 to 20, an optical lens group of example five of the present application is described. Fig. 17 shows a schematic diagram of the structure of an optical lens group of example five.

As shown in fig. 17, the optical lens assembly sequentially includes, from a light incident side to a light emitting side: the optical system comprises a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, an optical filter E7 and an imaging surface S15.

In this example, the total effective focal length f of the optical lens group is 2.01mm, the half of the maximum field angle Semi-FOV of the optical lens group is 62.5 °, the total length TTL of the optical lens group is 5.10mm and the image height ImgH is 3.03mm.

Table 9 shows a basic structural parameter table of the optical lens group of example five, in which the units of radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 9

Table 10 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example five, where each of the aspherical surface types can be defined by equation (1) given in example one above.

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

4.0500E-01

-8.9712E-02

1.6081E-02

-4.1737E-03

1.3935E-03

-3.7990E-04

4.1459E-05

0.0000E+00

S2

3.5604E-01

-7.1925E-02

2.6294E-03

1.7073E-03

1.4429E-03

-2.0535E-04

-2.3260E-04

0.0000E+00

S3

1.7327E-02

-4.7392E-03

6.7416E-03

2.9736E-03

2.7353E-04

-4.3626E-04

-2.6093E-04

0.0000E+00

S4

3.7093E-02

6.5656E-03

2.7048E-03

9.6276E-04

2.4201E-04

2.7869E-05

-1.1722E-05

0.0000E+00

S5

2.0151E-03

-1.1068E-03

5.5806E-05

1.2200E-04

7.8309E-05

3.5533E-05

1.4583E-05

4.7009E-06

8.8943E-07

S6

-1.0347E-01

-5.4007E-05

1.0921E-03

4.6589E-04

7.8549E-05

7.5255E-05

3.4445E-05

9.5075E-06

2.9664E-06

S7

-1.8667E-01

1.6401E-02

3.0721E-03

1.3886E-03

-2.3402E-04

6.4227E-05

-2.0353E-05

1.2553E-05

-1.5565E-05

S8

-1.3671E-01

3.1864E-02

-1.5753E-03

2.2198E-03

-1.5774E-04

1.2360E-04

1.6567E-05

-1.2698E-06

-6.9436E-06

S9

-3.2818E-02

7.9073E-03

-6.1863E-03

3.1667E-04

-2.9014E-04

-2.0889E-04

5.0510E-05

-3.1866E-05

-3.6161E-07

S10

2.6340E-01

1.1203E-01

-1.4371E-02

6.1395E-04

-1.3426E-03

1.0017E-03

-1.0550E-04

1.8090E-04

2.5050E-06

S11

-1.7293E+00

2.8114E-01

-1.9053E-02

1.7787E-02

-1.4144E-02

-8.7338E-04

1.6300E-03

2.3956E-03

5.7803E-04

S12

-3.3687E+00

5.0016E-01

-1.6547E-01

6.4562E-02

-1.8302E-02

9.9106E-03

-2.9278E-03

1.5853E-03

-7.8640E-04

Table 10

Fig. 18 shows an on-axis chromatic aberration curve for the optical lens set of example five, which represents the deviation of the converging focus of light rays of different wavelengths after passing through the optical lens set. Fig. 19 shows an astigmatism curve of the optical lens group of example five, which represents meridional image surface curvature and sagittal image surface curvature. Fig. 20 shows a magnification chromatic aberration curve of the optical lens group of example five, which represents the deviation of different image heights on the imaging plane after light passes through the optical lens group.

As can be seen from fig. 18 to 20, the optical lens set provided in example five can achieve good imaging quality.

Example six

As shown in fig. 21 to 24, an optical lens group of example six of the present application is described. Fig. 21 shows a schematic view of the structure of an optical lens group of example six.

As shown in fig. 21, the optical lens assembly sequentially includes, from a light incident side to a light emitting side: the optical system comprises a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, an optical filter E7 and an imaging surface S15.

In this example, the total effective focal length f of the optical lens group is 2.16mm, the half of the maximum field angle Semi-FOV of the optical lens group is 60.8 °, the total length TTL of the optical lens group is 5.10mm and the image height ImgH is 3.03mm.

Table 11 shows a basic structural parameter table of the optical lens group of example six, in which the units of radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

/>

TABLE 11

Table 12 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example six, where each of the aspherical surface types can be defined by equation (1) given in example one above.

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

4.0242E-01

-9.0430E-02

1.5741E-02

-4.4180E-03

1.3923E-03

-2.1166E-04

2.1262E-04

0.0000E+00

S2

3.5299E-01

-7.3112E-02

5.2409E-03

1.7044E-03

1.4411E-03

-1.0947E-04

-2.4392E-05

0.0000E+00

S3

1.5144E-02

-3.8848E-03

6.8778E-03

2.2254E-03

2.5090E-04

-2.5084E-04

-4.4000E-05

0.0000E+00

S4

3.8479E-02

7.4600E-03

2.6062E-03

8.3834E-04

1.7961E-04

2.4697E-05

1.4913E-06

0.0000E+00

S5

3.4147E-03

-1.5386E-03

-5.1311E-05

9.4114E-05

6.8152E-05

4.4609E-05

2.7227E-05

1.1130E-05

3.0989E-06

S6

-1.0398E-01

-1.5720E-03

8.1341E-04

5.3711E-04

-1.9271E-05

3.8322E-05

-5.2413E-05

-2.4179E-05

-1.9429E-05

S7

-1.8763E-01

1.5705E-02

3.7119E-03

1.3759E-03

-5.1140E-04

-9.0995E-05

-6.0691E-05

-2.8073E-06

-4.8501E-06

S8

-1.3804E-01

3.2357E-02

-1.1912E-03

1.9031E-03

-3.9970E-04

5.2827E-05

2.1723E-06

-7.7520E-06

1.0134E-05

S9

-3.6402E-02

8.4019E-03

-6.0009E-03

3.3559E-04

-2.5818E-04

-1.6664E-04

7.4121E-05

-4.2276E-05

7.1003E-06

S10

1.8473E-01

1.0572E-01

-2.1391E-02

1.3394E-04

-2.2904E-03

9.2445E-04

-2.7808E-04

2.5594E-04

-3.6781E-05

S11

-1.9018E+00

3.4186E-01

-4.2728E-02

2.2334E-02

-1.6372E-02

1.3762E-04

1.9260E-03

2.5554E-03

1.5868E-04

S12

-3.9059E+00

6.5429E-01

-2.2555E-01

9.2353E-02

-3.1424E-02

1.4492E-02

-6.0923E-03

2.6728E-03

-1.9397E-03

Table 12

Fig. 22 shows an on-axis chromatic aberration curve of the optical lens group of example six, which indicates the convergent focus deviation of light rays of different wavelengths after passing through the optical lens group. Fig. 23 shows an astigmatism curve of the optical lens group of example six, which represents meridional image surface curvature and sagittal image surface curvature. Fig. 24 shows a magnification chromatic aberration curve of the optical lens group of example six, which represents the deviation of different image heights on the imaging plane after light passes through the optical lens group.

As can be seen from fig. 22 to 24, the optical lens group given in example six can achieve good imaging quality.

In summary, examples one to six satisfy the relationships shown in table 13, respectively.

Table 13 table 14 shows the effective focal lengths f of the optical lens groups of examples one to six, the effective focal lengths f1 to f6 of the respective lenses, and the like.

Parameters/examples	1	2	3	4	5	6
							f(mm)	2.05	1.89	1.87	1.91	2.01	2.16
f1(mm)	-5.53	-3.03	-2.91	-2.98	-3.24	-3.25
							f2(mm)	-100.00	5.38	5.15	4.75	6.69	6.76
f3(mm)	2.24	2.71	2.66	2.65	2.68	2.48
							f4(mm)	-4.38	-6.60	-6.64	-2.72	-4.91	-4.20
f5(mm)	2.25	2.75	2.68	1.94	2.36	2.48
							f6(mm)	-6.27	-16.17	-12.93	-10.68	-8.04	-7.17
TTL(mm)	5.05	5.00	5.05	5.20	5.10	5.10
							ImgH(mm)	3.03	3.03	3.03	3.09	3.03	3.03
Semi-FOV(°)	61.8	63.0	63.5	61.4	62.5	60.8

TABLE 14

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

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical lens assembly, comprising, in order from a light incident side to a light emergent side along an optical axis:

a first lens having negative optical power, a surface of the first lens near an incident side being a concave surface;

The second lens is provided with optical power, and the surface of the second lens close to the emergent side is a concave surface;

A diaphragm;

A third lens having positive optical power;

a fourth lens having negative optical power, a surface of the fourth lens near the incident side being a concave surface;

a fifth lens having positive optical power, a surface of the fifth lens near the exit side being a convex surface;

A sixth lens having negative optical power;

Wherein at least one of the first lens to the sixth lens is a glass aspheric lens; an on-axis distance SAG11 between an intersection point of the optical axis and a surface of the first lens close to the incident side and an effective radius vertex of the surface of the first lens close to the incident side, and an on-axis distance SAG12 between an intersection point of the optical axis and a surface of the first lens close to the exit side and an effective radius vertex of the surface of the first lens close to the exit side are: -5.0 < (sag11+sag12)/(SAG 11-SAG 12) < -2.5; the maximum field angle FOV of the optical lens group satisfies: FOV >120 °; an on-axis distance TTL from a surface of the first lens near the incident side to the imaging surface and a half of a diagonal length ImgH of the effective pixel area on the imaging surface satisfy: TTL/ImgH is less than or equal to 1.7; the effective focal length f6 of the sixth lens and the radius of curvature R11 of the surface of the sixth lens near the incident side satisfy: -13.0 < f6/R11 < -5.5; the radius of curvature R11 of the surface of the sixth lens close to the incident side and the radius of curvature R12 of the surface of the sixth lens close to the exit side satisfy: 4.0 < (R11+R12)/(R11-R12) < 7.0.

2. The optical lens set according to claim 1, characterized in that between the effective focal length f of the optical lens set and the entrance pupil diameter EPD of the optical lens set: f/EPD is less than or equal to 3.0.

3. The optical lens set according to claim 1, wherein an on-axis distance SAG52 between a center thickness CT5 of the fifth lens on the optical axis and an intersection point of a face of the fifth lens near the exit side and the optical axis to an effective radius vertex of the face of the fifth lens near the exit side satisfies: -2.0 < CT5/SAG52 < -1.5.

4. The optical lens set according to claim 1, wherein a center thickness CT5 of the fifth lens on the optical axis and a center thickness CT6 of the sixth lens on the optical axis satisfy: CT5/CT6 is more than 1.0 and less than 2.0.

5. The optical lens set according to claim 1, wherein an air space T12 on the optical axis of the first lens and the second lens, an air space T23 on the optical axis of the second lens and the third lens, an air space T34 on the optical axis of the third lens and the fourth lens, and an air space T45 on the optical axis of the fourth lens and the fifth lens satisfy: 1.5 < (T12+T23)/(T34+T45) < 3.0.

6. The set of optical lenses according to claim 1, in which the central thickness CT1 of the first lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy: CT3/CT1 is more than 1.5 and less than 2.5.

7. The optical lens set according to claim 1, wherein an on-axis distance SAG61 between an intersection point of an edge thickness ET6 of the sixth lens and a plane of the sixth lens near the incident side and the optical axis to an effective radius vertex of the plane of the sixth lens near the incident side is: -3.5 < ET6/SAG61 < -1.5.

8. An optical lens assembly, comprising, in order from a light incident side to a light emergent side along an optical axis:

A diaphragm;

A third lens having positive optical power;

A sixth lens having negative optical power;

Wherein at least one of the first lens to the sixth lens is a glass aspheric lens; the effective focal length f of the optical lens group and the entrance pupil diameter EPD of the optical lens group satisfy: f/EPD is less than or equal to 3.0; the maximum field angle FOV of the optical lens group satisfies: FOV >120 °; an on-axis distance TTL from a surface of the first lens near the incident side to the imaging surface and a half of a diagonal length ImgH of the effective pixel area on the imaging surface satisfy: TTL/ImgH is less than or equal to 1.7; the effective focal length f6 of the sixth lens and the radius of curvature R11 of the surface of the sixth lens near the incident side satisfy: -13.0 < f6/R11 < -5.5; the radius of curvature R11 of the surface of the sixth lens close to the incident side and the radius of curvature R12 of the surface of the sixth lens close to the exit side satisfy: 4.0 < (R11+R12)/(R11-R12) < 7.0.

9. The optical lens set according to claim 8, wherein an on-axis distance SAG52 between a center thickness CT5 of the fifth lens on the optical axis and an intersection point of a face of the fifth lens near the exit side and the optical axis to an effective radius vertex of the face of the fifth lens near the exit side satisfies: -2.0 < CT5/SAG52 < -1.5.

10. The set of optical lenses according to claim 8, in which the central thickness CT5 of the fifth lens on the optical axis and the central thickness CT6 of the sixth lens on the optical axis satisfy: CT5/CT6 is more than 1.0 and less than 2.0.

11. The optical lens set according to claim 8, wherein an air space T12 on the optical axis of the first lens and the second lens, an air space T23 on the optical axis of the second lens and the third lens, an air space T34 on the optical axis of the third lens and the fourth lens, and an air space T45 on the optical axis of the fourth lens and the fifth lens satisfy: 1.5 < (T12+T23)/(T34+T45) < 3.0.

12. The set of optical lenses of claim 8, in which a central thickness CT1 of the first lens on the optical axis and a central thickness CT3 of the third lens on the optical axis satisfy: CT3/CT1 is more than 1.5 and less than 2.5.

13. The optical lens set according to claim 8, wherein an on-axis distance SAG61 between an intersection point of the edge thickness ET6 of the sixth lens and the plane of the sixth lens near the incident side and the optical axis to an effective radius vertex of the plane of the sixth lens near the incident side is: -3.5 < ET6/SAG61 < -1.5.