CN211905839U

CN211905839U - Optical imaging lens group

Info

Publication number: CN211905839U
Application number: CN202020552356.7U
Authority: CN
Inventors: 张佳莹; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2020-11-10
Anticipated expiration: 2030-04-14

Abstract

The application discloses an optical imaging lens assembly, which comprises, in order from an object side to an image side along an optical axis: a first prism having a first reflective surface; a first lens having a focal power, an object-side surface of which is convex; a second lens having an optical power; a third lens with focal power, wherein the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; a fourth lens having an optical power; a fifth lens having optical power; and a second prism having a second reflective surface. The optical distortion dist of the optical imaging lens group satisfies: the | < 0.1% Dist.

Description

Optical imaging lens group

Technical Field

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

Background

With the rapid development of electronic products, the application of the camera lens is more and more extensive. On one hand, with the trend of developing electronic products gradually toward lightness and thinness, the camera lens not only needs to have good image quality, but also needs to have lightness and thinness characteristics, so that the product cost can be effectively reduced and the humanized design can be more met. On the other hand, people have made higher demands on the image quality of objects captured by the imaging lens of electronic products. Meanwhile, with the advancement of semiconductor manufacturing technology, the pixel size of the photosensitive element is being reduced, so that the imaging lens mounted on the portable electronic product such as a mobile phone or a digital camera is gradually becoming smaller and higher in pixel area.

How to ensure that the camera lens has the characteristics of smaller total length, good imaging quality and smaller distortion on the basis of realizing the characteristics of lightness, thinness, miniaturization and the like of the camera lens is one of the problems to be solved by many lens designers at present.

SUMMERY OF THE UTILITY MODEL

An aspect of the present application provides an optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprising: a first prism having a first reflective surface; a first lens having a focal power, an object-side surface of which is convex; a second lens having an optical power; a third lens with focal power, wherein the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; a fourth lens having an optical power; a fifth lens having optical power; and a second prism having a second reflective surface; the optical distortion dist of the optical imaging lens group can satisfy: the | < 0.1% Dist.

In one embodiment, the object-side surface of the first lens element to the image-side surface of the fifth lens element has at least one aspherical mirror surface.

In one embodiment, the combined focal length f34 of the third and fourth lenses and half of the maximum field angle Semi-FOV of the optical imaging lens group may satisfy: -1.3mm < f34 Xtan (Semi-FOV) < -0.3 mm.

In one embodiment, the combined focal length f12 of the first and second lenses and the effective focal length f4 of the fourth lens may satisfy: -0.7 < f4/f12 < -0.2.

In one embodiment, the radius of curvature R1 of the object-side surface of the first lens and the total effective focal length f of the optical imaging lens group satisfy: r1/f is more than 0.2 and less than 0.7.

In one embodiment, the radius of curvature R9 of the object-side surface of the fifth lens, the radius of curvature R10 of the image-side surface of the fifth lens, and the effective focal length f5 of the fifth lens may satisfy: -0.7 < (R9+ R10)/f5 < -0.2.

In one embodiment, a distance SAG32 on the optical axis from the intersection point of the image-side surface of the third lens and the optical axis to the effective radius vertex of the image-side surface of the third lens and a distance SAG52 on the optical axis from the intersection point of the image-side surface of the fifth lens and the optical axis to the effective radius vertex of the image-side surface of the fifth lens may satisfy: -1.0 < SAG32/SAG52 < -0.5.

In one embodiment, the edge thickness ET1 of the first lens and the edge thickness ET3 of the third lens may satisfy: 0.3 < ET1/ET3 < 0.8.

In one embodiment, the edge thickness ET4 of the fourth lens and the edge thickness ET5 of the fifth lens may satisfy: 0.3 < ET5/(ET4+ ET5) < 0.8.

In one embodiment, the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R6 of the image-side surface of the third lens may satisfy: 0.5 < R5/R6 < 1.0.

In one embodiment, a central thickness CT1 of the first lens on the optical axis, a central thickness CT2 of the second lens on the optical axis, a central thickness CT3 of the third lens on the optical axis, a central thickness CT4 of the fourth lens on the optical axis, and a central thickness CT5 of the fifth lens on the optical axis may satisfy: 0.5 < (CT2+ CT4)/(CT1+ CT3+ CT5) < 1.5.

In one embodiment, the separation distance T12 between the first lens and the second lens on the optical axis and the separation distance T23 between the second lens and the third lens on the optical axis may satisfy: 0.2 < T12/T23 < 0.7.

In one embodiment, the fourth lens may have a positive optical power.

In one embodiment, the fifth lens element can have a negative power, and the object-side surface can be convex and the image-side surface can be concave.

The application further provides an optical imaging lens group. The optical imaging lens assembly sequentially comprises from an object side to an image side along an optical axis: a first prism having a first reflective surface; a first lens having an optical power; a second lens having an optical power; a third lens having optical power; a fourth lens having a positive optical power; a fifth lens element with negative refractive power having a convex object-side surface and a concave image-side surface; and a second prism having a second reflective surface. The optical distortion dist of the optical imaging lens group satisfies: the | < 0.1% Dist.

The application provides an optical imaging lens group, which has at least one beneficial effect of miniaturization, ultra-small distortion, good imaging quality and the like.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

fig. 1 shows a schematic structural view of an optical imaging lens group according to embodiment 1 of the present application;

fig. 2 shows a schematic optical path diagram of an optical imaging lens group according to embodiment 1 of the present application;

fig. 3A to 3C show an astigmatism curve, a distortion curve, and an MTF (modulation transfer function) imaging curve, respectively, of the optical imaging lens group of example 1;

fig. 4 is a schematic view showing a structure of an optical imaging lens group according to embodiment 2 of the present application;

fig. 5A to 5C show an astigmatism curve, a distortion curve, and an MTF imaging curve, respectively, of the optical imaging lens group of embodiment 2;

fig. 6 is a schematic view showing a structure of an optical imaging lens group according to embodiment 3 of the present application;

fig. 7A to 7C show an astigmatism curve, a distortion curve, and an MTF imaging curve, respectively, of the optical imaging lens group of embodiment 3;

fig. 8 is a schematic view showing a structure of an optical imaging lens group according to embodiment 4 of the present application;

fig. 9A to 9C show an astigmatism curve, a distortion curve, and an MTF imaging curve, respectively, of the optical imaging lens group of embodiment 4;

fig. 10 is a schematic view showing a structure of an optical imaging lens group according to embodiment 5 of the present application;

fig. 11A to 11C show an astigmatism curve, a distortion curve, and an MTF imaging curve, respectively, of the optical imaging lens group of example 5;

fig. 12 is a schematic view showing a structure of an optical imaging lens group according to embodiment 6 of the present application;

fig. 13A to 13C show an astigmatism curve, a distortion curve, and an MTF imaging curve, respectively, of the optical imaging lens group of embodiment 6;

fig. 14 is a schematic view showing a structure of an optical imaging lens group according to embodiment 7 of the present application;

fig. 15A to 15C show an astigmatism curve, a distortion curve, and an MTF imaging curve, respectively, of the optical imaging lens group of embodiment 7;

fig. 16 is a schematic view showing a structure of an optical imaging lens group according to embodiment 8 of the present application; and

fig. 17A to 17C show an astigmatism curve, a distortion curve, and an MTF imaging curve, respectively, of the optical imaging lens group of embodiment 8.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in this specification, 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, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for 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 closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

Unless otherwise defined, all terms (including 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. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

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 application will be described in detail below with reference to the embodiments with reference to the attached drawings.

The features, principles, and other aspects of the present application are described in detail below.

The optical imaging lens group according to an exemplary embodiment of the present application may include two prisms and five lenses having optical power, respectively, a first prism, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a second prism. The two prisms and the five lenses are arranged in order from the object side to the image side along the optical axis. The first prism and the first lens may have a separation distance therebetween. Any adjacent two lenses of the first lens to the fifth lens can have a spacing distance therebetween. The fifth lens and the second prism may have a separation distance therebetween.

In an exemplary embodiment, the first prism may have a light incident surface, a first reflecting surface, and a light emitting surface; the first lens can have positive focal power or negative focal power, and the object side surface of the first lens can be a convex surface; the incident light can enter from the light incident surface of the first prism, is reflected by the first reflecting surface and is emitted to the object side surface of the first lens from the light emitting surface of the first prism; the second lens may have a positive or negative optical power; the third lens can have positive focal power or negative focal power, the object side surface of the third lens can be a concave surface, and the image side surface of the third lens can be a convex surface; the fourth lens may have a positive power or a negative power; the fifth lens may have a positive power or a negative power; and the second prism may have a light incident surface, a second reflecting surface, and a light emitting surface; incident light emitted from the image side surface of the fifth lens is incident on the light incident surface of the second prism, reflected by the second reflecting surface and emitted from the light emitting surface of the second prism. Through the control of the surface types of the first lens and the third lens, the ultra-small distortion characteristic of the optical imaging lens group is favorably realized, and the imaging quality of the lens is favorably improved.

In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: l Dist < 0.1%, wherein Dist is the optical distortion of the optical imaging lens group. More specifically, dist further can satisfy: the | < 0.02% Dist. The method meets the requirement that the absolute Dist < 0.1%, is favorable for meeting the requirement of ultra-small distortion of a lens, is favorable for reducing the aberration of a system, greatly improves the imaging quality of the system, and can furthest reduce the real appearance of an object by the ultra-small optical distortion.

In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: -1.3mm < f34 × tan (Semi-FOV) < -0.3mm, wherein f34 is the combined focal length of the third lens and the fourth lens, and the Semi-FOV is half of the maximum field angle of the optical imaging lens group. More specifically, f34 and Semi-FOV further satisfy: -1.2mm < f34 Xtan (Semi-FOV) < -0.5 mm. Satisfies the following conditions: -1.3mm < f34 Xtan (Semi-FOV) < -0.3mm, which contributes to the ultra-thin characteristic and ultra-small distortion characteristic of the system.

In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: -0.7 < f4/f12 < -0.2, wherein f12 is the combined focal length of the first and second lenses and f4 is the effective focal length of the fourth lens. Satisfying-0.7 < f4/f12 < -0.2, the optical power of the system can be reasonably distributed, so that the positive and negative spherical aberration of the front lens and the rear lens are mutually cancelled out.

In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.2 < R1/f < 0.7, wherein R1 is a radius of curvature of an object side surface of the first lens, and f is an overall effective focal length of the optical imaging lens group. More specifically, R1 and f further satisfy: r1/f is more than 0.2 and less than 0.6. The requirement that R1/f is more than 0.2 and less than 0.7 is met, focal power distribution is favorably adjusted, the total length of the system is shortened, the miniaturization of a module is realized, and meanwhile, the tolerance sensitivity of the system is favorably balanced.

In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: -0.7 < (R9+ R10)/f5 < -0.2, wherein R9 is the radius of curvature of the object-side surface of the fifth lens, R10 is the radius of curvature of the image-side surface of the fifth lens, and f5 is the effective focal length of the fifth lens. More specifically, R9, R10, and f5 may further satisfy: -0.7 < (R9+ R10)/f5 < -0.3. Satisfy-0.7 < (R9+ R10)/f5 < -0.2, be favorable to correcting the chromatic aberration better, improve the imaging quality; while at the same time avoiding problems of increased sensitivity to system tolerances due to excessive concentration of optical power and excessive bending of the surface.

In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: -1.0 < SAG32/SAG52 < -0.5, wherein SAG32 is a distance on the optical axis from the intersection point of the image-side surface of the third lens and the optical axis to the vertex of the effective radius of the image-side surface of the third lens, and SAG52 is a distance on the optical axis from the intersection point of the image-side surface of the fifth lens and the optical axis to the vertex of the effective radius of the image-side surface of the fifth lens. Satisfy-1.0 < SAG32/SAG52 < -0.5, be favorable to the relation of better balanced module miniaturization and the relative illuminance of off-axis visual field.

In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.3 < ET1/ET3 < 0.8, wherein ET1 is the edge thickness of the first lens and ET3 is the edge thickness of the third lens. More specifically, ET1 and ET3 further satisfy: 0.4 < ET1/ET3 < 0.8. The space ratio of the first lens and the third lens can be reasonably controlled, the assembly process of the lens is favorably ensured, and the miniaturization of the optical imaging lens group is favorably realized.

In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.3 < ET5/(ET4+ ET5) < 0.8, wherein ET4 is the edge thickness of the fourth lens and ET5 is the edge thickness of the fifth lens. More specifically, ET4 and ET5 further satisfy: 0.3 < ET5/(ET4+ ET5) < 0.7. The condition that ET5/(ET4+ ET5) < 0.3 is satisfied, the field curvature of the optical imaging lens group can be effectively ensured, and the off-axis field of view of the optical imaging lens group can obtain good imaging quality.

In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.5 < R5/R6 < 1.0, wherein R5 is a radius of curvature of an object-side surface of the third lens, and R6 is a radius of curvature of an image-side surface of the third lens. More specifically, R5 and R6 may further satisfy: 0.6 < R5/R6 < 1.0. The requirement that R5/R6 is more than 0.5 and less than 1.0 is met, the deflection angle of light can be reduced, and the deflection of a light path of the system is better realized.

In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.5 < (CT2+ CT4)/(CT1+ CT3+ CT5) < 1.5, wherein CT1 is a central thickness of the first lens on the optical axis, CT2 is a central thickness of the second lens on the optical axis, CT3 is a central thickness of the third lens on the optical axis, CT4 is a central thickness of the fourth lens on the optical axis, and CT5 is a central thickness of the fifth lens on the optical axis. More specifically, CT2, CT4, CT1, CT3, and CT5 may further satisfy: 0.5 < (CT2+ CT4)/(CT1+ CT3+ CT5) < 1.3. The requirement of 0.5 < (CT2+ CT4)/(CT1+ CT3+ CT5) < 1.5 is met, the distortion contribution of each field of view of the system can be controlled within a reasonable range, and the imaging quality is improved.

In an exemplary embodiment, an optical imaging lens group according to the present application may satisfy: 0.2 < T12/T23 < 0.7, wherein T12 is the distance of the first lens and the second lens from each other on the optical axis, and T23 is the distance of the second lens and the third lens from each other on the optical axis. More specifically, T12 and T23 may further satisfy: 0.2 < T12/T23 < 0.5. The requirement that the T12/T23 is less than 0.2 and less than 0.7 can control the field curvature contribution of each field of view of the system within a reasonable range.

In an exemplary embodiment, the fourth lens may have a positive optical power. The optical power design of the fourth lens is beneficial to the optical imaging lens group to have ultrathin property.

In an exemplary embodiment, the fifth lens element may have a negative power, and the object-side surface thereof may be convex and the image-side surface thereof may be concave. The optical power and the surface type design of the fifth lens are beneficial to the optical imaging lens group to have ultrathin characteristics.

In an exemplary embodiment, an optical imaging lens group according to the present application further includes a stop disposed between the first prism and the first lens. Optionally, the optical imaging lens group may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on an imaging surface. The application provides an optical imaging lens group with characteristics of long focus, miniaturization, ultra-small distortion, ultra-thin and the like. The optical imaging lens group according to the above-described embodiment of the present application may employ a plurality of lenses, such as the five lenses and the two prisms described above. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the on-axis distance between each lens, the position of a reflecting surface, the spacing distance between a prism and each lens and the like, incident light can be effectively converged, the total length of the optical imaging lens group can be reduced, the processability of the optical imaging lens group can be improved, and the optical imaging lens group is more beneficial to production and processing.

In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object-side surface of the first lens to the image-side surface of the fifth lens is an aspherical mirror surface. The aspheric 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 better curvature radius characteristics, 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. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens is an aspheric mirror surface. Optionally, each of the first, second, third, fourth, and fifth lenses has an object-side surface and an image-side surface that are aspheric mirror surfaces.

However, it will be appreciated by those skilled in the art that the number of lenses constituting the optical imaging lens group can be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although five lenses are exemplified in the embodiment, the optical imaging lens group is not limited to include five lenses. The optical imaging lens group may also include other numbers of lenses, if desired.

Specific examples of the optical imaging lens group applicable to the above-described embodiments are further described below with reference to the drawings.

Example 1

An optical imaging lens group according to embodiment 1 of the present application is described below with reference to fig. 1 to 3C. Fig. 1 shows a schematic structural diagram of an optical imaging lens group according to embodiment 1 of the present application. Fig. 2 shows a schematic optical path diagram of an optical imaging lens group according to embodiment 1 of the present application.

As shown in fig. 1, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first prism L1, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a second prism L2, a filter E6, and an image forming surface S13.

The first prism L1 has a light incident surface P3, a first reflection surface P1, and a light exit surface P4. The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The second prism L2 has a light incident surface P5, a second reflection surface P2, and a light exit surface P6. Filter E6 has an object side S11 and an image side S12. As shown in fig. 2, light a1, a2, a3, and the like from the object sequentially passes through the respective surfaces P3 to S12 and is finally imaged on the imaging surface S13.

Table 1 shows a basic parameter table of the optical imaging lens group of embodiment 1, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).

TABLE 1

In the present example, the total effective focal length f of the optical imaging lens group is 7.02mm, half of the maximum field angle Semi-FOV of the optical imaging lens group is 10.6 °, half of the diagonal length ImgH of the effective pixel area on the imaging plane S13 of the optical imaging lens group is 1.31mm, and the ratio f/EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 3.95.

In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 to the fifth lens E5 are aspheric surfaces, and the surface shape x of each aspheric 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 shows the high-order coefficient A of each of the aspherical mirror surfaces S1 to S10 used in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-3.0325E-02

7.3497E-01

-6.0693E+00

2.6444E+01

-6.6073E+01

1.0237E+02

-9.7895E+01

5.3106E+01

-1.2536E+01

S2

-3.1196E-01

5.6990E+00

-4.3971E+01

1.7020E+02

-3.7122E+02

4.7850E+02

-3.5979E+02

1.4459E+02

-2.3728E+01

S3

4.1731E-02

3.8557E+00

-3.9664E+01

1.6919E+02

-3.9155E+02

5.2683E+02

-4.0901E+02

1.6808E+02

-2.7834E+01

S4

-1.2751E-01

1.8797E+00

-1.5758E+01

7.5587E+01

-2.0731E+02

3.3535E+02

-3.1764E+02

1.6358E+02

-3.5520E+01

S5

-2.0488E-01

6.2173E-01

-1.1820E+00

8.5673E+00

-4.1224E+01

9.6550E+01

-1.1904E+02

7.5197E+01

-1.9311E+01

S6

1.9240E-01

-2.3137E+00

1.3547E+01

-4.4692E+01

9.0182E+01

-1.1282E+02

8.4760E+01

-3.4769E+01

5.9179E+00

S7

1.6340E-01

-2.0125E+00

1.1130E+01

-3.7092E+01

7.9913E+01

-1.1072E+02

9.4503E+01

-4.5007E+01

9.1229E+00

S8

2.0712E-01

-1.3281E+00

4.8679E+00

-1.2363E+01

2.2309E+01

-2.8592E+01

2.4593E+01

-1.2434E+01

2.7351E+00

S9

5.1769E-01

-1.2895E+00

3.9397E+00

-9.2425E+00

1.5182E+01

-1.7621E+01

1.4379E+01

-7.3326E+00

1.6909E+00

S10

6.2424E-01

-8.5652E-01

7.5214E-01

9.6767E-01

-5.6520E+00

1.1201E+01

-1.1710E+01

6.3506E+00

-1.4105E+00

TABLE 2

Fig. 3A shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens group of embodiment 1. Fig. 3B shows a distortion curve of the optical imaging lens group of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 3C shows an MTF imaging curve of the optical imaging lens group of embodiment 1, which represents a case where the modulation degree of the optical imaging lens group varies with spatial frequency. As can be seen from fig. 3A to 3C, the optical imaging lens assembly according to embodiment 1 can achieve good imaging quality.

Example 2

An optical imaging lens group according to embodiment 2 of the present application is described below with reference to fig. 4 to 5C. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 4 shows a schematic structural diagram of an optical imaging lens group according to embodiment 2 of the present application.

As shown in fig. 4, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first prism L1, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a second prism L2, a filter E6, and an image forming surface S13.

The first prism L1 has a light incident surface P3, a first reflection surface P1, and a light exit surface P4. The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The second prism L2 has a light incident surface P5, a second reflection surface P2, and a light exit surface P6. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces P3 to S12 and is finally imaged on the imaging surface S13.

Table 3 shows a basic parameter table of the optical imaging lens group of embodiment 2, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 4 shows high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 3

TABLE 4

Fig. 5A shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens group of embodiment 2. Fig. 5B shows a distortion curve of the optical imaging lens group of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 5C shows an MTF imaging curve of the optical imaging lens group of embodiment 2, which represents a case where the modulation degree of the optical imaging lens group varies with spatial frequency. As can be seen from fig. 5A to 5C, the optical imaging lens assembly according to embodiment 2 can achieve good imaging quality.

Example 3

An optical imaging lens group according to embodiment 3 of the present application is described below with reference to fig. 6 to 7C. Fig. 6 shows a schematic structural view of an optical imaging lens group according to embodiment 3 of the present application.

As shown in fig. 6, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first prism L1, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a second prism L2, a filter E6, and an image forming surface S13.

The first prism L1 has a light incident surface P3, a first reflection surface P1, and a light exit surface P4. The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The second prism L2 has a light incident surface P5, a second reflection surface P2, and a light exit surface P6. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces P3 to S12 and is finally imaged on the imaging surface S13.

In the present example, the total effective focal length f of the optical imaging lens group is 7.00mm, half of the maximum field angle Semi-FOV of the optical imaging lens group is 10.6 °, half of the diagonal length ImgH of the effective pixel area on the imaging plane S13 of the optical imaging lens group is 1.31mm, and the ratio f/EPD of the total effective focal length f of the optical imaging lens group to the entrance pupil diameter EPD of the optical imaging lens group is 3.95.

Table 5 shows a basic parameter table of the optical imaging lens group of embodiment 3, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 6 shows high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 5

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-2.8308E-04

1.5224E-01

-1.0581E+00

5.6522E+00

-1.6905E+01

3.1116E+01

-3.4634E+01

2.1335E+01

-5.5992E+00

S2

-1.0905E-01

1.2194E+00

-8.8020E+00

3.5863E+01

-8.3531E+01

1.1461E+02

-9.0325E+01

3.7040E+01

-5.9858E+00

S3

-3.9756E-02

1.2042E+00

-1.0086E+01

4.1913E+01

-9.8890E+01

1.3527E+02

-1.0370E+02

3.9630E+01

-5.3609E+00

S4

-1.5536E-01

1.5916E+00

-7.8106E+00

2.7805E+01

-6.5665E+01

9.7004E+01

-8.5785E+01

4.1739E+01

-8.6619E+00

S5

-2.0868E-01

1.1988E+00

-5.3131E+00

1.9343E+01

-4.8766E+01

7.9304E+01

-7.9286E+01

4.4440E+01

-1.0727E+01

S6

-1.2471E-02

-2.6749E-02

-5.3574E-01

4.0398E+00

-1.0669E+01

1.5117E+01

-1.2760E+01

6.1675E+00

-1.3304E+00

S7

1.7188E-04

-7.8741E-02

4.9278E-02

6.0897E-01

-1.2519E-01

-3.4535E+00

6.1986E+00

-4.2588E+00

1.0638E+00

S8

1.4966E-01

-4.6927E-01

-1.4358E-01

3.4938E+00

-8.3075E+00

9.2208E+00

-4.9827E+00

9.7485E-01

5.6845E-02

S9

3.5504E-01

-2.1869E-01

-2.2518E+00

1.1352E+01

-2.6402E+01

3.5316E+01

-2.7649E+01

1.1784E+01

-2.1158E+00

S10

5.1070E-01

-4.8540E-01

-9.4123E-01

6.8666E+00

-1.8608E+01

2.8977E+01

-2.6705E+01

1.3524E+01

-2.9056E+00

TABLE 6

Fig. 7A shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens group of embodiment 3. Fig. 7B shows a distortion curve of the optical imaging lens group of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 7C shows an MTF imaging curve of the optical imaging lens group of embodiment 3, which represents a case where the modulation degree of the optical imaging lens group varies with spatial frequency. As can be seen from fig. 7A to 7C, the optical imaging lens assembly according to embodiment 3 can achieve good imaging quality.

Example 4

An optical imaging lens group according to embodiment 4 of the present application is described below with reference to fig. 8 to 9C. Fig. 8 shows a schematic structural view of an optical imaging lens group according to embodiment 4 of the present application.

As shown in fig. 8, the optical imaging lens assembly, in order from an object side to an image side, comprises: the optical imaging lens group comprises the following components in order from an object side to an image side: a first prism L1, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a second prism L2, a filter E6, and an image forming surface S13.

The first prism L1 has a light incident surface P3, a first reflection surface P1, and a light exit surface P4. The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The second prism L2 has a light incident surface P5, a second reflection surface P2, and a light exit surface P6. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces P3 to S12 and is finally imaged on the imaging surface S13.

Table 7 shows a basic parameter table of the optical imaging lens group of embodiment 4, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 8 shows high-order term coefficients that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 7

TABLE 8

Fig. 9A shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens group of embodiment 4. Fig. 9B shows a distortion curve of the optical imaging lens group of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 9C shows an MTF imaging curve of the optical imaging lens group of embodiment 4, which represents a case where the modulation degree of the optical imaging lens group varies with spatial frequency. As can be seen from fig. 9A to 9C, the optical imaging lens group according to embodiment 4 can achieve good imaging quality.

Example 5

An optical imaging lens group according to embodiment 5 of the present application is described below with reference to fig. 10 to 11C. Fig. 10 shows a schematic structural view of an optical imaging lens group according to embodiment 5 of the present application.

As shown in fig. 10, the optical imaging lens assembly, in order from an object side to an image side, comprises: the optical imaging lens group comprises the following components in order from an object side to an image side: a first prism L1, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a second prism L2, a filter E6, and an image forming surface S13.

The first prism L1 has a light incident surface P3, a first reflection surface P1, and a light exit surface P4. The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The second prism L2 has a light incident surface P5, a second reflection surface P2, and a light exit surface P6. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces P3 to S12 and is finally imaged on the imaging surface S13.

Table 9 shows a basic parameter table of the optical imaging lens group of embodiment 5, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 10 shows high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 9

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.5252E-02

3.1560E-01

-2.5785E+00

1.2677E+01

-3.4996E+01

5.9017E+01

-6.0553E+01

3.4813E+01

-8.6303E+00

S2

-1.6658E-01

2.5593E+00

-2.0267E+01

8.3747E+01

-1.9395E+02

2.6175E+02

-2.0172E+02

8.0447E+01

-1.2408E+01

S3

-6.1420E-02

2.3983E+00

-2.1457E+01

9.0351E+01

-2.1151E+02

2.8674E+02

-2.2001E+02

8.6053E+01

-1.2560E+01

S4

-5.1540E-02

1.4220E+00

-9.8831E+00

4.1538E+01

-1.0634E+02

1.6611E+02

-1.5483E+02

7.9521E+01

-1.7430E+01

S5

-1.8617E-01

1.2766E+00

-6.6641E+00

2.6991E+01

-7.4101E+01

1.3005E+02

-1.3902E+02

8.2418E+01

-2.0798E+01

S6

-1.3985E-02

-4.2868E-01

2.7598E+00

-7.7614E+00

1.2920E+01

-1.3088E+01

7.3009E+00

8.2418E+01

-5.6459E-02

S7

8.3150E-02

-9.7341E-01

5.0193E+00

-1.5604E+01

3.3395E+01

-4.8063E+01

4.3115E+01

-2.1477E+01

4.5102E+00

S8

1.6549E-01

-7.0129E-01

1.5406E+00

-2.6837E+00

5.1893E+00

-9.2138E+00

1.0408E+01

-6.2076E+00

1.4944E+00

S9

2.9056E-01

6.3786E-02

-1.9682E+00

7.8986E+00

-1.7844E+01

2.4870E+01

-2.0959E+01

9.7683E+00

-1.9272E+00

S10

5.3605E-01

-6.2239E-01

9.6584E-02

2.4559E+00

-7.8748E+00

1.3396E+01

-1.3401E+01

7.3692E+00

-1.7132E+00

Watch 10

Fig. 11A shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens group of embodiment 5. Fig. 11B shows a distortion curve of the optical imaging lens group of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 11C shows an MTF imaging curve of the optical imaging lens group of embodiment 5, which represents a case where the modulation degree of the optical imaging lens group varies with spatial frequency. As can be seen from fig. 11A to 11C, the optical imaging lens assembly according to embodiment 5 can achieve good imaging quality.

Example 6

An optical imaging lens group according to embodiment 6 of the present application is described below with reference to fig. 12 to 13C. Fig. 12 is a schematic view showing a structure of an optical imaging lens group according to embodiment 6 of the present application.

As shown in fig. 12, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first prism L1, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a second prism L2, a filter E6, and an image forming surface S13.

The first prism L1 has a light incident surface P3, a first reflection surface P1, and a light exit surface P4. The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The second prism L2 has a light incident surface P5, a second reflection surface P2, and a light exit surface P6. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces P3 to S12 and is finally imaged on the imaging surface S13.

Table 11 shows a basic parameter table of the optical imaging lens group of example 6, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 12 shows high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 11

TABLE 12

Fig. 13A shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens group of embodiment 6. Fig. 13B shows a distortion curve of the optical imaging lens group of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 13C shows an MTF imaging curve of the optical imaging lens group of embodiment 6, which represents a case where the modulation degree of the optical imaging lens group varies with spatial frequency. As can be seen from fig. 13A to 13C, the optical imaging lens group according to embodiment 6 can achieve good imaging quality.

Example 7

An optical imaging lens group according to embodiment 7 of the present application is described below with reference to fig. 14 to 15C. Fig. 14 shows a schematic structural view of an optical imaging lens group according to embodiment 7 of the present application.

As shown in fig. 14, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first prism L1, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a second prism L2, a filter E6, and an image forming surface S13.

The first prism L1 has a light incident surface P3, a first reflection surface P1, and a light exit surface P4. The first lens element E1 has positive and negative powers, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The second prism L2 has a light incident surface P5, a second reflection surface P2, and a light exit surface P6. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces P3 to S12 and is finally imaged on the imaging surface S13.

Table 13 shows a basic parameter table of the optical imaging lens group of example 7, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 14 shows high-order term coefficients that can be used for each aspherical mirror surface in example 7, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

Watch 13

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

2.3756E-02

6.3146E-02

-6.4686E-01

4.3844E+00

-1.3801E+01

2.5306E+01

-2.7906E+01

1.7156E+01

-4.5181E+00

S2

-7.8369E-02

7.4357E-01

-7.0502E+00

3.3702E+01

-8.5434E+01

1.2421E+02

-1.0363E+02

4.5837E+01

-8.3073E+00

S3

7.9488E-02

1.8670E-01

-5.5856E+00

2.9191E+01

-7.5763E+01

1.0989E+02

-8.8930E+01

3.6627E+01

-5.7434E+00

S4

1.8459E-02

4.9692E-01

-2.7593E+00

1.0811E+01

-2.8823E+01

4.7906E+01

-4.6941E+01

2.4964E+01

-5.6050E+00

S5

-1.6609E-01

8.6788E-01

-3.3424E+00

1.0499E+01

-2.4256E+01

3.8467E+01

-3.8867E+01

2.2331E+01

-5.5409E+00

S6

1.1221E-02

-1.1801E-01

2.5903E-04

2.2855E+00

-7.7022E+00

1.2085E+01

-1.0578E+01

5.0525E+00

-1.0419E+00

S7

3.7069E-03

-1.1759E-01

1.3131E-01

1.5306E+00

-5.5379E+00

8.2120E+00

-6.1984E+00

2.3032E+00

-3.2474E-01

S8

9.2994E-02

-2.0318E-01

-4.2460E-01

3.0276E+00

-7.6045E+00

1.0769E+01

-8.8146E+00

3.8432E+00

-6.8611E-01

S9

3.4684E-01

-1.7308E-01

-1.2399E+00

5.4470E+00

-1.2248E+01

1.7564E+01

-1.5623E+01

7.7033E+00

-1.5913E+00

S10

4.8738E-01

-4.8072E-01

-2.2615E-01

2.3905E+00

-5.8312E+00

9.0369E+00

-9.2144E+00

5.4095E+00

-1.3469E+00

TABLE 14

Fig. 15A shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens group of embodiment 7. Fig. 15B shows a distortion curve of the optical imaging lens group of embodiment 7, which represents distortion magnitude values corresponding to different image heights. Fig. 15C shows an MTF imaging curve of the optical imaging lens group of embodiment 7, which represents a case where the modulation degree of the optical imaging lens group varies with spatial frequency. As can be seen from fig. 15A to 15C, the optical imaging lens group according to embodiment 7 can achieve good imaging quality.

Example 8

An optical imaging lens group according to embodiment 8 of the present application is described below with reference to fig. 16 to 17C. Fig. 16 is a schematic view showing a structure of an optical imaging lens group according to embodiment 8 of the present application.

As shown in fig. 16, the optical imaging lens assembly, in order from an object side to an image side, comprises: a first prism L1, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a second prism L2, a filter E6, and an image forming surface S13.

The first prism L1 has a light incident surface P3, a first reflection surface P1, and a light exit surface P4. The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The second prism L2 has a light incident surface P5, a second reflection surface P2, and a light exit surface P6. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces P3 to S12 and is finally imaged on the imaging surface S13.

Table 15 shows a basic parameter table of the optical imaging lens group of embodiment 8, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 16 shows high-order term coefficients that can be used for each aspherical mirror surface in example 8, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

Watch 15

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.3460E-02

1.8469E-01

-1.0586E+00

5.0352E+00

-1.4446E+01

2.6174E+01

-2.9048E+01

1.7963E+01

-4.7418E+00

S2

-1.1942E-01

1.3085E+00

-9.2304E+00

3.7042E+01

-8.5352E+01

1.1647E+02

-9.1996E+01

3.8152E+01

-6.2831E+00

S3

-1.4747E-02

1.2511E+00

-1.2266E+01

5.4717E+01

-1.3625E+02

1.9905E+02

-1.6846E+02

7.5782E+01

-1.3865E+01

S4

6.3713E-02

5.3590E-01

-6.7143E+00

3.5652E+01

-1.0159E+02

1.6769E+02

-1.6118E+02

8.4076E+01

-1.8467E+01

S5

-9.1310E-02

1.5652E-01

-1.8271E+00

1.4296E+01

-4.9670E+01

9.4541E+01

-1.0323E+02

6.0956E+01

-1.5151E+01

S6

-9.0162E-04

1.0734E-01

-1.2110E+00

4.9425E+00

-9.6533E+00

1.0566E+01

-7.1522E+00

3.0989E+00

-7.0812E-01

S7

-4.6420E-02

4.5496E-01

-2.2523E+00

5.7066E+00

-6.2889E+00

-1.4292E-01

6.8024E+00

-5.8077E+00

1.5757E+00

S8

1.0139E-01

-1.2705E-01

-1.2042E+00

5.3857E+00

-1.0398E+01

1.0630E+01

-5.4625E+00

9.9380E-01

7.8897E-02

S9

3.5891E-01

-8.3569E-02

-2.6217E+00

1.1707E+01

-2.6074E+01

3.4050E+01

-2.6167E+01

1.0960E+01

-1.9355E+00

S10

4.8984E-01

-4.3353E-01

-1.0574E+00

7.2722E+00

-1.9853E+01

3.1257E+01

-2.9036E+01

1.4778E+01

-3.1866E+00

TABLE 16

Fig. 17A shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens group of embodiment 8. Fig. 17B shows a distortion curve of the optical imaging lens group of embodiment 8, which represents distortion magnitude values corresponding to different image heights. Fig. 17C shows an MTF imaging curve of the optical imaging lens group of embodiment 8, which represents a case where the modulation degree of the optical imaging lens group varies with spatial frequency. As can be seen from fig. 17A to 17C, the optical imaging lens group according to embodiment 8 can achieve good imaging quality.

In summary, examples 1 to 8 each satisfy the relationship shown in table 17.

Conditions/examples	1	2	3	4	5	6	7	8
									\|Dist.\|	0.011	0.011	0.007	0.010	0.007	0.002	0.005	0.008
f34×tan(Semi-FOV)(mm)	-0.71	-0.73	-0.79	-0.59	-0.89	-1.16	-0.85	-0.82
									f4/f12	-0.23	-0.23	-0.41	-0.22	-0.57	-0.62	-0.48	-0.36
R1/f	0.31	0.30	0.45	0.35	0.35	0.48	0.44	0.38
									(R9+R10)/f5	-0.50	-0.49	-0.57	-0.66	-0.47	-0.34	-0.52	-0.50
SAG32/SAG52	-0.62	-0.62	-0.75	-0.80	-0.87	-0.97	-0.70	-0.57
									ET1/ET3	0.71	0.70	0.57	0.66	0.50	0.45	0.63	0.72
ET5/(ET4+ET5)	0.37	0.41	0.41	0.46	0.66	0.45	0.44	0.38
									R5/R6	0.82	0.77	0.70	0.96	0.81	0.71	0.66	0.68
(CT2+CT4)/(CT1+CT3+CT5)	1.26	1.13	1.02	1.01	0.60	0.92	1.05	1.06
									T12/T23	0.38	0.34	0.31	0.30	0.28	0.29	0.30	0.46

TABLE 17

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 imaging lens group described above.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:

a first prism having a first reflective surface;

a first lens having a focal power, an object-side surface of which is convex;

a second lens having an optical power;

a third lens with focal power, wherein the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface;

a fourth lens having an optical power;

a fifth lens having optical power; and

a second prism having a second reflective surface;

the optical distortion Dist of the optical imaging lens group satisfies: the | < 0.1% Dist.

2. The optical imaging lens group of claim 1 wherein the combined focal length f34 of the third and fourth lenses and half the Semi-FOV of the maximum field angle of the optical imaging lens group satisfy: -1.3mm < f34 Xtan (Semi-FOV) < -0.3 mm.

3. The optical imaging lens group of claim 1 wherein the combined focal length f12 of the first and second lenses and the effective focal length f4 of the fourth lens satisfy: -0.7 < f4/f12 < -0.2.

4. The optical imaging lens group of claim 1 wherein the radius of curvature R1 of the object side surface of the first lens and the total effective focal length f of the optical imaging lens group satisfy: r1/f is more than 0.2 and less than 0.7.

5. The optical imaging lens group of claim 1, wherein the radius of curvature of the object-side surface of the fifth lens, R9, the radius of curvature of the image-side surface of the fifth lens, R10, and the effective focal length f5 of the fifth lens satisfy: -0.7 < (R9+ R10)/f5 < -0.2.

6. The optical imaging lens group of claim 1, wherein a distance SAG32 on the optical axis from an intersection point of an image-side surface of the third lens and the optical axis to an effective radius vertex of the image-side surface of the third lens to a distance SAG52 on the optical axis from an intersection point of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens satisfies: -1.0 < SAG32/SAG52 < -0.5.

7. The optical imaging lens group of claim 1 wherein the first lens edge thickness ET1 and the third lens edge thickness ET3 satisfy: 0.3 < ET1/ET3 < 0.8.

8. The optical imaging lens group of claim 1, wherein the edge thickness ET4 of the fourth lens and the edge thickness ET5 of the fifth lens satisfy: 0.3 < ET5/(ET4+ ET5) < 0.8.

9. The optical imaging lens group of claim 1, wherein the radius of curvature of the object-side surface of the third lens, R5, and the radius of curvature of the image-side surface of the third lens, R6, satisfy: 0.5 < R5/R6 < 1.0.

10. The optical imaging lens group of claim 1, wherein a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, and a center thickness CT5 of the fifth lens on the optical axis satisfy: 0.5 < (CT2+ CT4)/(CT1+ CT3+ CT5) < 1.5.

11. The optical imaging lens group of claim 1 wherein a separation distance T12 on the optical axis between the first lens and the second lens and a separation distance T23 on the optical axis between the second lens and the third lens satisfy: 0.2 < T12/T23 < 0.7.

12. The optical imaging lens group of any of claims 1-11, wherein the fourth lens has positive optical power.

13. The optical imaging lens group of any of claims 1-11, wherein the fifth lens element has a negative power and has a convex object-side surface and a concave image-side surface.

14. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:

a first prism having a first reflective surface;

a first lens having an optical power;

a second lens having an optical power;

a third lens having optical power;

a fourth lens having a positive optical power;

a fifth lens element with negative refractive power having a convex object-side surface and a concave image-side surface; and

a second prism having a second reflective surface;

15. The optical imaging lens group of claim 14 wherein the combined focal length f34 of the third and fourth lenses and half the Semi-FOV of the maximum field angle of the optical imaging lens group satisfy: -1.3mm < f34 Xtan (Semi-FOV) < -0.3 mm.

16. The optical imaging lens group of claim 14 wherein the combined focal length f12 of the first and second lenses and the effective focal length f4 of the fourth lens satisfy: -0.7 < f4/f12 < -0.2.

17. The optical imaging lens group of claim 14 wherein the radius of curvature R1 of the object side surface of the first lens and the total effective focal length f of the optical imaging lens group satisfy: r1/f is more than 0.2 and less than 0.7.

18. The optical imaging lens group of claim 14, wherein the radius of curvature of the object-side surface of the fifth lens, R9, the radius of curvature of the image-side surface of the fifth lens, R10, and the effective focal length f5 of the fifth lens satisfy: -0.7 < (R9+ R10)/f5 < -0.2.

19. The optical imaging lens group of claim 14, wherein a distance SAG32 on the optical axis from an intersection point of the image-side surface of the third lens and the optical axis to an effective radius vertex of the image-side surface of the third lens to a distance SAG52 on the optical axis from an intersection point of the image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens satisfies: -1.0 < SAG32/SAG52 < -0.5.

20. The optical imaging lens group of claim 14 wherein the first lens edge thickness ET1 and the third lens edge thickness ET3 satisfy: 0.3 < ET1/ET3 < 0.8.

21. The optical imaging lens group of claim 14, wherein the edge thickness ET4 of the fourth lens and the edge thickness ET5 of the fifth lens satisfy: 0.3 < ET5/(ET4+ ET5) < 0.8.

22. The optical imaging lens group of claim 14 wherein the radius of curvature of the object-side surface of the third lens, R5, and the radius of curvature of the image-side surface of the third lens, R6, satisfy: 0.5 < R5/R6 < 1.0.

23. The optical imaging lens group of claim 14 wherein the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, the central thickness CT4 of the fourth lens on the optical axis, and the central thickness CT5 of the fifth lens on the optical axis satisfy: 0.5 < (CT2+ CT4)/(CT1+ CT3+ CT5) < 1.5.

24. The optical imaging lens group of claim 14 wherein a separation distance T12 on the optical axis between the first lens and the second lens and a separation distance T23 on the optical axis between the second lens and the third lens satisfy: 0.2 < T12/T23 < 0.7.

25. The optical imaging lens group of any of claims 14-24, wherein the object side surface of the first lens is convex.

26. The optical imaging lens group of any one of claims 14-24, wherein the third lens element has a concave object-side surface and a convex image-side surface.