CN114114627A

CN114114627A - Optical lens group

Info

Publication number: CN114114627A
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: 2022-03-01
Anticipated expiration: 2041-12-02
Also published as: CN114114627B

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

At present, the development of the related field of optical imaging is receiving more and more attention. Taking an optical lens group as an example, a traditional optical lens group generally comprises plastic lenses in order to ensure light weight and low cost, but the plastic lenses are made of less materials, so that chromatic aberration is large, the image quality of the final optical lens group is greatly affected, and the plastic is easy to deform under high-temperature and low-temperature environments due to the self material, so that the condition of reducing the image quality is easy to occur when a mobile phone camera made of the plastic lenses is used for taking pictures at high temperature or low temperature.

That is to say, the optical lens assembly in the prior art has the problem that high image quality and the ability to adapt to high and low temperature environments are difficult to realize simultaneously.

Disclosure of Invention

The invention mainly aims to provide an optical lens group to solve the problem that the optical lens group in the prior art has high image quality and the capability of adapting to high and low temperature environments and is difficult to realize simultaneously.

In order to achieve the above object, according to one aspect of the present invention, there is provided an optical lens group comprising, in order from a light incident side to a light exiting side along an optical axis: the first lens has negative focal power, and the surface of the first lens close to 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; a diaphragm; a third lens having an 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 focal power, and the surface of the fifth lens close to the emergent side is a convex surface; a sixth lens having an optical power; at least one of the first lens to the sixth lens is a glass aspheric lens; an on-axis distance SAG11 between the intersection point of the surface close to the incident side of the first lens and the optical axis and the effective radius vertex of the surface close to the incident side of the first lens and an on-axis distance SAG12 between the intersection point of the surface close to the exit side of the first lens and the optical axis and the effective radius vertex of the surface close to the exit side of the first lens satisfy: -5.0 < (SAG11+ SAG12)/(SAG11-SAG12) < -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, an on-axis distance TTL from a surface of the first mirror closer to the incident side to the imaging surface and a half ImgH of a diagonal length of the effective pixel area on the imaging surface satisfy: TTL/ImgH is less than or equal to 1.7.

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

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

Further, 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: 1.0 < CT5/CT6 < 2.0.

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

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

Further, 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: 1.5 < CT3/CT1 < 2.5.

Further, the on-axis distance SAG61 from the intersection point of the edge thickness ET6 of the sixth lens and the optical axis to the effective radius vertex of the surface of the sixth lens close to 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 exiting side along an optical axis: the first lens has negative focal power, and the surface of the first lens close to 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; a diaphragm; a third lens having an 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 focal power, and the surface of the fifth lens close to the emergent side is a convex surface; a sixth lens having an optical power; 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 meet the following requirements: f/EPD is less than or equal to 3.0.

Further, the maximum field angle FOV of the optical lens group satisfies: FOV >120 °; an on-axis distance SAG11 between the intersection point of the surface close to the incident side of the first lens and the optical axis and the effective radius vertex of the surface close to the incident side of the first lens and an on-axis distance SAG12 between the intersection point of the surface close to the exit side of the first lens and the optical axis and the effective radius vertex of the surface close to the exit side of the first lens satisfy: -5.0 < (SAG11+ SAG12)/(SAG11-SAG12) < -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 a light incidence side to a light emergence side along an optical axis, 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 focal 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 focal power, and the surface of the fifth lens close to the emergent side is a convex surface; the sixth lens has focal power; at least one of the first lens to the sixth lens is a glass aspheric lens; an on-axis distance SAG11 between the intersection point of the surface close to the incident side of the first lens and the optical axis and the effective radius vertex of the surface close to the incident side of the first lens and an on-axis distance SAG12 between the intersection point of the surface close to the exit side of the first lens and the optical axis and the effective radius vertex of the surface close to the exit side of the first lens satisfy: -5.0 < (SAG11+ SAG12)/(SAG11-SAG12) < -2.5.

The wide-angle characteristic can be realized by reasonably distributing the focal power of each lens, and the reasonable distribution of the focal power can reduce the sensitivity and improve the image quality. At least one lens in first lens to the sixth lens is glass aspheric lens, and the setting can reduce the aberration like this, controls the temperature drift, promotes like quality, improves the influence of high temperature or low temperature environment to like quality. The processing characteristics of the first lens can be ensured and the assembly is facilitated by constraining the relational expression between the on-axis distance SAG11 from the intersection point of the surface close to the incident side of the first lens and the optical axis to the effective radius vertex of the surface close to the incident side of the first lens and the on-axis distance SAG12 from the intersection point of the surface close to the emergent side of the first lens and the optical axis to the effective radius vertex of the surface close to the emergent side of the first lens to be within a reasonable range.

In addition, the optical lens group of this application has wide angle, adapts to high low temperature environment, big light ring and ultra-thin characteristics. The optical lens group has the characteristic of wide angle, so that the shooting range of the optical lens group is larger than that of a common lens; the optical lens group is added with the lens made of glass materials, so that the imaging quality can be improved, and the optical lens group can adapt to high and low temperature environments; the large aperture can ensure better image quality in a darker environment; the whole volume of ultra-thin optical lens group of guaranteeing is less to improve pleasing to the eye degree when satisfying the miniaturization.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of an optical lens assembly according to a first embodiment of the present invention;

fig. 2 to 4 respectively show an axial chromatic aberration curve, an astigmatism curve and a chromatic aberration of magnification curve of the optical lens set in fig. 1;

FIG. 5 is a schematic view of an optical lens assembly according to a second embodiment of the present invention;

fig. 6 to 8 show an axial chromatic aberration curve, an astigmatism curve and a chromatic aberration of magnification curve of the optical lens set in fig. 5, respectively;

FIG. 9 is a schematic structural diagram of an optical lens assembly according to a third example of the present invention;

fig. 10 to 12 show an axial chromatic aberration curve, an astigmatism curve and a chromatic aberration of magnification curve of the optical lens set in fig. 9, respectively;

FIG. 13 is a schematic view of an optical lens assembly according to example four of the present invention;

fig. 14 to 16 show an axial chromatic aberration curve, an astigmatism curve and a chromatic aberration of magnification curve of the optical lens group of fig. 13, respectively;

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

fig. 18 to 20 show an axial chromatic aberration curve, an astigmatic curve, and a chromatic aberration of magnification curve of the optical lens group of fig. 17, respectively;

FIG. 21 is a schematic structural diagram of an optical lens set according to example six of the present invention;

fig. 22 to 24 show an axial chromatic aberration curve, an astigmatism curve, and a chromatic aberration of magnification curve of the optical lens group of fig. 21, respectively.

Wherein the figures include the following reference numerals:

e1, a first lens; s1, the surface of the first lens close to the incident side; s2, the surface of the first lens close to the emergent side; e2, a second lens; s3, the surface of the second lens close to the incident side; s4, the surface of the second lens close to the emergent side; STO, stop; e3, third lens; s5, the surface of the third lens close to the incident side; s6, the surface of the third lens close to the emergent side; e4, fourth lens; s7, the surface of the fourth lens close to the incident side; s8, the surface of the fourth lens close to the emergent side; e5, fifth lens; s9, the surface of the fifth lens close to the incident side; s10, the surface of the fifth lens close to the emergent side; e6, sixth lens; s11, the surface of the sixth lens close to the incident side; s12, the surface of the sixth lens close to the emergent side; e7, optical filters; s13, the surface of the filter close to the incident side; s14, the surface of the filter close to the emergent side; and S15, imaging surface.

Detailed Description

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

It is noted that, unless otherwise indicated, 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.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, 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 the convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and 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, it means that 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 incidence side becomes the surface of the lens close to the incidence side, and the surface of each lens close to the light emergence side is called the surface of the lens close to the emergence side. The determination of the surface shape in the paraxial region can be made by determining whether or not the surface shape is concave or convex using an R value (R denotes a radius of curvature of the paraxial region, and usually denotes an R value in a lens database (lens data) in optical software) according to a determination method by a person ordinarily skilled in the art. On the surface close to the incident side, when the R value is positive, the surface is judged to be convex, and when the R value is negative, the surface is judged to be concave; the surface closer to 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, aiming at solving the problem that the optical lens group in the prior art has high image quality and the capability of adapting to high and low temperature environments and is difficult to realize simultaneously.

Example one

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

Preferably, -4.7 < (SAG11+ SAG12)/(SAG11-SAG12) < -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 restricted within a certain range, so that the characteristic of large field angle is favorably met, and the obtained object space information can be effectively expanded. Preferably, the FOV is >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 facilitated, and the optical lens group can have good imaging quality in a dark environment.

In the present embodiment, an on-axis distance TTL from a surface of the first mirror closer to the incident side to the imaging surface and a half ImgH of a diagonal length 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 the half ImgH of the diagonal length of the effective pixel area on the imaging surface is controlled within a reasonable range, so that the size 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 central thickness CT5 of the fifth lens on the optical axis and the intersection point of the surface of the fifth lens close to the exit side and the optical axis to the effective radius vertex of the surface of the fifth lens close to the exit side satisfies: 2.0 < CT5/SAG52 < -1.5. The condition is satisfied, the central thickness of the fifth lens can be ensured within a reasonable range, and the forming processing characteristic of the fifth lens is effectively improved. Preferably, -1.9 < CT5/SAG52 < -1.5.

In the present embodiment, a curvature radius R11 of a surface of the sixth lens on the incident side and a curvature radius R12 of a surface of the sixth lens on the exit side satisfy: 4.0 < (R11+ R12)/(R11-R12) < 7.0. The conditional expression is satisfied, the curvature and the focal power of the sixth lens are favorably ensured, the processability of the sixth lens is favorably improved, and aberration can be reduced. Preferably 4.4 < (R11+ R12)/(R11-R12) < 6.5.

In the present embodiment, 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: 1.0 < CT5/CT6 < 2.0. By restraining the ratio of the central thickness CT5 of the fifth lens on the optical axis to the central thickness CT6 of the sixth lens on the optical axis within a reasonable range, the central thicknesses of the fifth lens and the sixth lens are favorably and reasonably distributed, the aberration is reduced, and the assembly performance is improved. Preferably, 1.4 < CT5/CT6 < 1.9.

In the present embodiment, an air interval T12 of the first lens and the second lens on the optical axis, an air interval T23 of the second lens and the third lens on the optical axis, an air interval T34 of the third lens and the fourth lens on the optical axis, and an air interval T45 of the fourth lens and the fifth lens on the optical axis satisfy: 1.5 < (T12+ T23)/(T34+ T45) < 3.0. The condition is satisfied, the light is prevented from being deflected too much when being transmitted between the lenses, and the processing difficulty of the optical lens group is reduced. 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 condition is satisfied, which is beneficial to reasonably controlling the bending degree of the sixth lens, so 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: 1.5 < CT3/CT1 < 2.5. The condition is satisfied, the center thicknesses of the first lens and the third lens are favorably and reasonably distributed, and the assembling performance of the lenses is improved while the aberration is reduced. Preferably, 1.8 < CT3/CT1 < 2.3.

In the present embodiment, the on-axis distance SAG61 between the edge thickness ET6 of the sixth lens and the intersection point of the surface of the sixth lens close to the incident side and the optical axis to the effective radius vertex of the surface of the sixth lens close to the incident side satisfies: -3.5 < ET6/SAG61 < -1.5. The ratio of the edge thickness ET6 of the sixth lens to the axial distance SAG61 from the intersection point of the incident side surface and the optical axis of the sixth lens to the effective radius vertex of the incident side surface of the sixth lens is restrained within a reasonable range, so that the edge thickness of the sixth lens is guaranteed, and the forming processability of the sixth lens can be improved. Preferably, -3.1 < ET6/SAG61 < -1.9.

Example two

As shown in fig. 1 to 24, the optical lens assembly includes, in order from the light incident side to the light emergent side along the optical axis, a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens and a sixth lens, wherein the first lens has a negative focal power, and a surface of the first lens near the light 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 focal 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 focal power, and the surface of the fifth lens close to the emergent side is a convex surface; the sixth lens has focal power; 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 meet the following requirements: f/EPD is less than or equal to 3.0.

The wide-angle characteristic can be realized by reasonably distributing the focal power of each lens, and the reasonable distribution of the focal power can reduce the sensitivity and improve the image quality. At least one lens in first lens to the sixth lens is glass aspheric lens, and the setting can reduce the aberration like this, controls the temperature drift, promotes like quality, improves the influence of high temperature or low temperature environment to like 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 in a reasonable range, so that the characteristic of a large aperture is facilitated, and the optical lens group can have good imaging quality in a dark environment.

In the present embodiment, an on-axis distance SAG11 between an intersection point of the surface of the first lens on the incident side and the optical axis to an effective radius vertex of the surface of the first lens on the incident side and an on-axis distance SAG12 between an intersection point of the surface of the first lens on the exit side and the optical axis to an effective radius vertex of the surface of the first lens on the exit side satisfy: -5.0 < (SAG11+ SAG12)/(SAG11-SAG12) < -2.5. The processing characteristics of the first lens can be ensured and the assembly is facilitated by constraining the relational expression between the on-axis distance SAG11 from the intersection point of the surface close to the incident side of the first lens and the optical axis to the effective radius vertex of the surface close to the incident side of the first lens and the on-axis distance SAG12 from the intersection point of the surface close to the emergent side of the first lens and the optical axis to the effective radius vertex of the surface close to the emergent side of the first lens to be within a reasonable range. Preferably, -4.7 < (SAG11+ SAG12)/(SAG11-SAG12) < -2.8.

Optionally, the optical lens group may further include a filter for correcting color deviation or a protective glass for protecting a photosensitive element on the image plane.

The optical lens assembly in the present application may employ a plurality of lenses, such as the six lenses described above. The optical lens group is more beneficial to production and processing and is applicable to portable electronic equipment such as smart phones and the like by reasonably distributing the focal power, the surface shape, the center thickness of each lens, the on-axis distance between each lens and the like, so that the sensitivity of the lens can be effectively reduced and the processability of the lens can be improved. 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 aspheric lens has the characteristics 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 lens center to the lens periphery, an aspherical lens has a better curvature radius characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality.

However, it is understood by those skilled in the art that the number of lenses constituting the optical lens group may be varied to obtain the various results and advantages described in the present description without departing from the technical solutions claimed in the present application. For example, although six lenses are exemplified in the embodiments, the optical lens group is not limited to include six lenses. The optical lens set can also include other numbers of lenses, if necessary.

Examples of specific surface types and parameters of the optical lens set applicable to the above embodiments are further described below with reference to the drawings.

It should be noted that any one of the following examples one to six is applicable to all embodiments of the present application.

Example one

Fig. 1 to 4 show an optical lens assembly according to a first example of the present application. Fig. 1 is a schematic diagram illustrating a structure of an optical lens set according to an example one.

As shown in fig. 1, the optical lens assembly sequentially includes, from the light incident side to the light emergent side: 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, a filter E7 and an imaging surface S15.

The first lens E1 has negative power, and the surface S1 of the first lens near the incident side is a concave surface, and the surface S2 of the first lens near the exit side is a convex surface. The second lens E2 has negative power, the surface S3 of the second lens near the incident side is convex, and the surface S4 of the second lens near the exit side is concave. The third lens E3 has positive power, and the surface S5 of the third lens near the incident side is a convex surface, and the surface S6 of the third lens near the exit side is a convex surface. The fourth lens E4 has negative power, and the surface S7 of the fourth lens near the incident side is a concave surface, and the surface S8 of the fourth lens near the exit side is a concave surface. The fifth lens E5 has positive power, and the surface S9 of the fifth lens near the incident side is a convex surface, and the surface S10 of the fifth lens near the exit side is a convex surface. The sixth lens E6 has negative power, and the surface S11 of the sixth lens on the incident side is a convex surface, and the surface S12 of the sixth lens on the exit side is a concave surface. The filter E7 has a face S13 on the incident side of the filter and a face S14 on the emission side of the filter. The 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 3.03 mm.

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

TABLE 1

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

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 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 i-th order of the aspherical surface. Table 2 below gives the high-order coefficient A4, A6, A8, A10, A12, A14, A16, A18, A20 that can be used for each of the aspherical mirrors S1-S12 in example one.

Flour mark

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 axial chromatic aberration curve of the optical lens assembly of the first example, which shows the deviation of the convergent focus of light rays with different wavelengths after passing through the optical lens assembly. FIG. 3 shows astigmatism curves for the first example set of optical lenses representing meridional field curvature and sagittal field curvature. Fig. 4 shows a chromatic aberration of magnification curve of the optical lens assembly of the first example, which shows the deviation of different image heights of the light passing through the optical lens assembly on the image plane.

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

Example two

Fig. 5 to 8 show an optical lens assembly according to the second embodiment of the present application. In this example and the following examples, descriptions of parts similar to example one will be omitted for the sake of brevity. Fig. 5 is a schematic diagram illustrating a structure of an optical lens set of example two.

As shown in fig. 5, the optical lens assembly sequentially includes, from the light incident side to the light exiting side: 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, a filter E7 and an imaging surface S15.

The first lens E1 has negative power, and the surface S1 of the first lens near the incident side is a concave surface, and the surface S2 of the first lens near the exit side is a concave surface. The second lens E2 has positive power, the surface S3 of the second lens near the incident side is convex, and the surface S4 of the second lens near the exit side is concave. The third lens E3 has positive power, and the surface S5 of the third lens near the incident side is a convex surface, and the surface S6 of the third lens near the exit side is a convex surface. The fourth lens E4 has negative power, and the surface S7 of the fourth lens near the incident side is a concave surface, and the surface S8 of the fourth lens near the exit side is a concave surface. The fifth lens E5 has positive optical power, and the surface S9 of the fifth lens near the incident side is a concave surface, and the surface S10 of the fifth lens near the exit side is a convex surface. The sixth lens E6 has negative power, and the surface S11 of the sixth lens on the incident side is a convex surface, and the surface S12 of the sixth lens on the exit side is a concave surface. The filter E7 has a face S13 on the incident side of the filter and a face S14 on the emission side of the filter. The 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 Semi-FOV of the maximum field angle 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 3.03 mm.

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

TABLE 3

Table 4 shows the high-order term coefficients that can be used for each aspherical mirror surface in example two, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark

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

Fig. 6 shows an axial chromatic aberration curve of the optical lens assembly of example two, which shows the deviation of the convergent focus of light rays with different wavelengths after passing through the optical lens assembly. FIG. 7 shows astigmatism curves of the second set of optical lenses, representing meridional field curvature and sagittal field curvature. Fig. 8 shows a chromatic aberration of magnification curve of the optical lens assembly of the second example, which shows the deviation of different image heights of the light passing through the optical lens assembly on the image plane.

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

Example III

Fig. 9 to 12 show an optical lens assembly according to example three of the present application. Fig. 9 is a schematic diagram illustrating a structure of an optical lens group in example three.

As shown in fig. 9, the optical lens assembly sequentially includes, from the light incident side to the light exiting side: 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, a 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 Semi-FOV of the maximum field angle 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 3.03 mm.

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

TABLE 5

Table 6 shows the high-order term coefficients that can be used for each aspherical mirror surface in example three, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark

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 axial chromatic aberration curve of the optical lens assembly of example three, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the optical lens assembly. FIG. 11 shows astigmatism curves for the optical lens group of example three, which represent meridional field curvature and sagittal field curvature. Fig. 12 shows a chromatic aberration of magnification curve of the optical lens assembly of example three, which shows the deviation of different image heights of the light passing through the optical lens assembly on the image plane.

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

Example four

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

As shown in fig. 13, the optical lens assembly sequentially includes, from the light incident side to the light exiting side: 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, a filter E7 and an imaging surface S15.

The first lens E1 has negative power, and the surface S1 of the first lens near the incident side is a concave surface, and the surface S2 of the first lens near the exit side is a concave surface. The second lens E2 has positive power, the surface S3 of the second lens near the incident side is convex, and the surface S4 of the second lens near the exit side is concave. The third lens E3 has positive power, and the surface S5 of the third lens near the incident side is a convex surface, and the surface S6 of the third lens near the exit side is a convex surface. The fourth lens E4 has negative power, and the surface S7 of the fourth lens near the incident side is a concave surface, and the surface S8 of the fourth lens near the exit side is a concave surface. The fifth lens E5 has positive power, and the surface S9 of the fifth lens near the incident side is a convex surface, and the surface S10 of the fifth lens near the exit side is a convex surface. The sixth lens E6 has negative power, and the surface S11 of the sixth lens on the incident side is a convex surface, and the surface S12 of the sixth lens on the exit side is a concave surface. The filter E7 has a face S13 on the incident side of the filter and a face S14 on the emission side of the filter. The 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 3.09 mm.

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

TABLE 7

Table 8 shows the high-order term coefficients that can be used for each aspherical mirror surface in example four, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark

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 axial chromatic aberration curve of the optical lens assembly of example four, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the optical lens assembly. FIG. 15 shows astigmatism curves for the optical lens group of example four, which represent meridional field curvature and sagittal field curvature. Fig. 16 shows a chromatic aberration of magnification curve of the optical lens assembly of example four, which shows the deviation of different image heights of the light beam on the image plane after passing through the optical lens assembly.

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

Example five

Fig. 17 to 20 show an optical lens assembly according to example five of the present application. Fig. 17 is a schematic diagram illustrating a structure of an optical lens group in example five.

As shown in fig. 17, the optical lens assembly sequentially includes, from the light incident side to the light exiting side: 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, a 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 Semi-FOV of the maximum field angle 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 3.03 mm.

Table 9 shows a table of basic structural parameters for the optical lens set of example five, wherein the radius of curvature, thickness/distance, focal length, and effective radius are all in millimeters (mm).

TABLE 9

Table 10 shows the high-order term coefficients that can be used for each aspherical mirror surface in example five, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark

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

Watch 10

Fig. 18 shows an axial chromatic aberration curve of the optical lens group of example five, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the optical lens group. FIG. 19 shows astigmatism curves for the optical lens group of example five, representing meridional and sagittal image planes curvature. Fig. 20 shows a chromatic aberration of magnification curve of the optical lens assembly of example five, which shows the deviation of different image heights of light rays passing through the optical lens assembly on the image plane.

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

Example six

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

As shown in fig. 21, the optical lens assembly sequentially includes, from the light incident side to the light exiting side: 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, a 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 Semi-FOV of the maximum field angle 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 3.03 mm.

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

TABLE 11

Table 12 shows the high-order term coefficients that can be used for each of the aspherical mirror surfaces in example six, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

Flour mark

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 axial chromatic aberration curve of the optical lens group of example six, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the optical lens group. FIG. 23 shows astigmatism curves for the optical lens group of example six, which represent meridional field curvature and sagittal field curvature. Fig. 24 shows a chromatic aberration of magnification curve of the optical lens assembly of example six, which shows the deviation of different image heights of light rays passing through the optical lens assembly on the image plane.

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

To sum up, 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 sets of examples one to six, the effective focal lengths f1 to f6 of the respective lenses, and so on.

Parameter/example	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 present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical lens set described above.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection 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 example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of 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 claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement 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 exiting side along an optical axis:

the first lens has negative focal power, and the surface of the first lens close to 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;

a diaphragm;

a third lens having an 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 focal power, and the surface of the fifth lens close to the emergent side is a convex surface;

a sixth lens having an optical power;

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 surface of the first lens close to the incident side and the optical axis to 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 surface of the first lens close to the exit side and the optical axis to an effective radius vertex of the surface of the first lens close to the exit side satisfy: -5.0 < (SAG11+ SAG12)/(SAG11-SAG12) < -2.5.

2. The set of optical lenses of claim 1, wherein the maximum field angle FOV of the set of optical lenses satisfies: FOV > 120.

3. The optical lens group of claim 1, wherein an effective focal length f of the optical lens group and an entrance pupil diameter EPD of the optical lens group satisfy: f/EPD is less than or equal to 3.0.

4. The optical lens assembly of claim 1, wherein an on-axis distance TTL from a surface of the first lens element near the incident side to the imaging surface to a half ImgH of a diagonal length of an effective pixel area on the imaging surface satisfies: TTL/ImgH is less than or equal to 1.7.

5. The set of optical lenses of claim 1, wherein a center thickness CT5 of the fifth lens on the optical axis and an on-axis distance SAG52 from an intersection of the exit-side surface of the fifth lens and the optical axis to an effective radius vertex of the exit-side surface of the fifth lens satisfy: 2.0 < CT5/SAG52 < -1.5.

6. The set of optical lenses of claim 1, wherein a radius of curvature R11 of the surface of the sixth lens closer to the entrance side and a radius of curvature R12 of the surface of the sixth lens closer to the exit side satisfy: 4.0 < (R11+ R12)/(R11-R12) < 7.0.

7. The optical lens set of 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: 1.0 < CT5/CT6 < 2.0.

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

9. The set of optical lenses of claim 1, wherein an effective focal length f6 of the sixth lens element and a radius of curvature R11 of a face of the sixth lens element near the entrance side satisfy: 13.0 < f6/R11 < -5.5.

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

a diaphragm;

a third lens having an optical power;

a sixth lens having an optical power;

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 meet the following requirements: f/EPD is less than or equal to 3.0.