CN217181315U

CN217181315U - Macro lens

Info

Publication number: CN217181315U
Application number: CN202220399363.7U
Authority: CN
Inventors: 娄琪琪; 黄林; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2022-08-12
Anticipated expiration: 2032-02-25

Abstract

The utility model provides a macro lens, include in order by the income light side of macro lens to light-emitting side: the first lens has refractive power, the surface of the first lens facing the light-in side is concave, and the surface of the first lens facing the light-out side is convex; a second lens element with positive refractive power; a third lens element with refractive power; the fourth lens has refractive power, the surface of the fourth lens facing the light-in side is in a convex shape, and the surface of the fourth lens facing the light-out side is in a convex shape; the fifth lens element with refractive power has a concave surface facing the light incident side; the macro lens has a first object distance state and a second object distance state. The utility model provides an among the prior art macro lens have the quality poor problem of taking the detail picture.

Description

Macro lens

Technical Field

The utility model relates to an optical imaging device technical field particularly, relates to a macro lens.

Background

With the development of electronic products, the requirements on the camera function of the mobile terminal are more and more, for example, the mobile terminal is required to be capable of shooting a long-distance object to realize long-focus shooting; the mobile terminal is required to be capable of shooting close-up objects and realizing close-up shooting. The quality of shooting close-range objects by the existing macro lens is poor.

That is, the macro lens in the prior art has a problem of poor quality of taking a detailed picture.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a macro lens, which solves the problem of poor quality of the macro lens in the prior art.

In order to achieve the above object, according to an aspect of the present invention, there is provided a macro lens, which comprises in order from an incident light side to an emergent light side of the macro lens: the first lens has refractive power, the surface of the first lens facing the light-in side is concave, and the surface of the first lens facing the light-out side is convex; a second lens element with positive refractive power; a third lens element with refractive power; the fourth lens has refractive power, the surface of the fourth lens facing the light-in side is in a convex shape, and the surface of the fourth lens facing the light-out side is in a convex shape; the fifth lens element with refractive power has a concave surface facing the light incident side; the macro lens has a first object distance state and a second object distance state.

Further, the diameter EPD of the entrance pupil of the macro lens and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the macro lens satisfy: EPD/ImgH < 0.8.

Further, an on-axis distance TTL1 from the surface of the first lens facing the light incident side to the imaging surface of the macro lens in the first object distance state and a minimum on-axis distance TOL1 from the object to the surface of the first lens facing the light incident side in the first object distance state satisfy: 1.3< TTL1/TOL1< 1.9.

Further, an on-axis distance TD2 between the surface of the first lens facing the light-in side to the surface of the fifth lens facing the light-out side in the second object distance state of the macro lens and an on-axis distance TTL2 between the surface of the first lens facing the light-in side to the imaging surface of the macro lens in the second object distance state satisfy: 0.6< TD2/TTL2< 1.2.

Further, the magnification M1 of the macro lens in the first object distance state satisfies: 0.6< M1< 1.4.

Further, when the macro lens is in the first object distance state, the effective focal length F1 of the macro lens, the effective focal length F3 of the third lens and the effective focal length F4 of the fourth lens satisfy the following conditions: -1.5< F1/(F3+ F4) < -0.5.

Further, the combined focal length F23 of the second lens and the third lens and the effective focal length F2 of the macro lens in the second object distance state satisfy the following conditions: 0.5< F23/F2< 1.2.

Further, the curvature radius R9 of the surface of the fifth lens facing the light-entering side and the effective focal length f5 of the fifth lens satisfy: 0.2< R9/f5< 1.2.

Further, the curvature radius R5 of the surface of the third lens facing the light inlet side and the curvature radius R3 of the surface of the second lens facing the light inlet side satisfy that: -1.3< R5/R3< -0.5.

Further, the curvature radius R1 of the surface of the first lens facing the light-in side and the curvature radius R2 of the surface of the first lens facing the light-out side satisfy that: -0.8< (R1-R2)/(R1+ R2) <0.

Further, the center thickness CT5 of the fifth lens on the optical axis of the macro lens and the center thickness CT2 of the second lens on the optical axis satisfy: CT5/CT2< 0.8.

Further, an on-axis distance SAG11 between an intersection point of the optical axis of the macro lens and the surface of the first lens facing the light entrance side and an effective radius vertex of the surface of the first lens facing the light entrance side and a central thickness CT1 of the first lens on the optical axis satisfy: -1.0< SAG11/CT1< 0.

Further, an on-axis distance SAG41 between an intersection point of a surface of the fourth lens facing the light-in side and the optical axis of the macro lens and an effective radius vertex of the surface of the fourth lens facing the light-in side and an on-axis distance SAG42 between an intersection point of a surface of the fourth lens facing the light-out side and the optical axis and an effective radius vertex of a surface of the fourth lens facing the light-out side satisfy: -1.2< SAG41/SAG42 <0.

Further, the edge thickness ET1 of the first lens and the effective half aperture DT11 of the surface of the first lens facing the light incidence side satisfy: 0.2< ET1/DT11< 1.0.

Further, the abbe number V5 of the fifth lens and the abbe number V4 of the fourth lens satisfy: 0.4< V5/V4< 1.2.

According to the utility model discloses an on the other hand provides a macro lens, includes in order by the income light side of macro lens to light-emitting side: the first lens has refractive power, and the surface of the first lens facing the light emergent side is in a convex shape; the second lens has positive refractive power, and the surface of the second lens facing the light incidence side is in a convex shape; the third lens has refractive power, and the surface of the third lens, facing the light emergent side, is in a convex shape; a fourth lens element with refractive power; a fifth lens element with refractive power; the macro lens has a first object distance state and a second object distance state; when the macro lens is in the first object distance state, the F number Fno1 of the macro lens meets the following conditions: fno1< 1.6.

Use the technical scheme of the utility model, incline to the light-emitting side by the income light of macro lens and include first lens, second lens, third lens, fourth lens, fifth lens in order. The first lens has refractive power, the surface of the first lens facing the light-in side is concave, and the surface of the first lens facing the light-out side is convex; the second lens element with positive refractive power; the third lens element with refractive power; the fourth lens has refractive power, the surface of the fourth lens facing the light incident side is convex, and the surface of the fourth lens facing the light emergent side is convex; the fifth lens element with refractive power has a concave surface facing the light incident side; the macro lens has a first object distance state and a second object distance state.

By reasonably controlling the positive and negative distribution of the refractive power of each lens of the macro lens, the low-order aberration of the macro lens can be effectively balanced, the tolerance sensitivity of the macro lens can be reduced, the miniaturization of the macro lens is kept, and the imaging quality of the macro lens is ensured.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, 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 structural diagram of a macro lens according to a first example of the present invention in a first object distance state;

fig. 2 is a schematic structural diagram of a macro lens according to a first example of the present invention in a second range state;

fig. 3 to 6 respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the macro lens in fig. 1;

fig. 7 to 10 respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the macro lens in fig. 2;

fig. 11 is a schematic structural diagram of a macro lens according to a second example of the present invention in a first object distance state;

fig. 12 is a schematic structural diagram of a macro lens according to a second example of the present invention;

fig. 13 to 16 respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the macro lens in fig. 11;

fig. 17 to 20 respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the macro lens in fig. 12;

fig. 21 is a schematic structural diagram of a macro lens according to a third example of the present invention in a first object distance state;

fig. 22 is a schematic structural diagram of a macro lens according to a third example of the present invention in a second object distance state;

fig. 23 to 26 respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the macro lens in fig. 21;

fig. 27 to 30 respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the macro lens in fig. 22;

fig. 31 is a schematic structural diagram of a macro lens according to a fourth example of the present invention in a first object distance state;

fig. 32 is a schematic structural diagram of a macro lens according to a fourth example of the present invention in a second object distance state;

fig. 33 to 36 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the macro lens in fig. 31;

fig. 37 to 40 respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the macro lens in fig. 32;

fig. 41 is a schematic structural diagram of a macro lens according to a fifth example of the present invention in a first object distance state;

fig. 42 is a schematic structural diagram of a macro lens according to a fifth example of the present invention in a second object distance state;

fig. 43 to 46 respectively show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the macro lens in fig. 41;

fig. 47 to 50 respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the macro lens in fig. 42;

fig. 51 is a schematic structural diagram of a macro lens according to a sixth example of the present invention in a first object distance state;

fig. 52 is a schematic structural diagram of a macro lens according to a sixth example of the present invention in a second object distance state;

fig. 53 to 56 respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the macro lens in fig. 51;

fig. 57 to 60 respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the macro lens in fig. 52;

fig. 61 is a schematic structural view of a macro lens according to a seventh example of the present invention in a first object distance state;

fig. 62 is a schematic structural diagram of a macro lens according to a seventh example of the present invention in a second object distance state;

fig. 63 to 66 respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the macro lens in fig. 61;

fig. 67 to 70 respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the macro lens in fig. 2;

fig. 71 is a schematic structural diagram of a macro lens according to example eight of the present invention in a first object distance state;

fig. 72 is a schematic structural view of a macro lens according to an example eight of the present invention in a second object distance state;

fig. 73 to 76 respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the macro lens in fig. 71;

fig. 77 to 80 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the macro lens in fig. 72.

Wherein the figures include the following reference numerals:

e1, first lens; s1, the surface of the first lens facing the light incidence side; s2, the surface of the first lens facing the light-emitting side; e2, second lens; s3, the surface of the second lens facing the light incidence side; s4, the surface of the second lens facing the light-emitting side; e3, third lens; s5, the surface of the third lens facing the light incidence side; s6, the surface of the third lens facing the light-emitting side; e4, fourth lens; s7, the surface of the fourth lens facing the light incidence side; s8, the surface of the fourth lens facing the light-emitting side; e5, fifth lens; s9, the surface of the fifth lens facing the light incidence side; s10, the surface of the fifth lens facing the light-emitting side; e6, a filter plate; s11, the surface of the filter plate facing to the light incident side; s12, the surface of the filter plate facing the light-emitting side; s13, imaging surface; p, plane glass; p1, the surface of the plane glass facing to the light incidence side; p2, the surface of the planar glass facing the light exit side.

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 accompanying drawings in conjunction with embodiments.

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 application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; 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, 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 determination of the surface shape in the paraxial region can be performed by determining whether the surface shape is concave or convex based on the R value (R denotes the radius of curvature of the paraxial region, and usually denotes the R value in the lens database (lens data) in the optical software) according to the determination method of a person ordinarily skilled in the art. With respect to the surface facing the light incident side, a convex shape is determined when the R value is positive, and a concave shape is determined when the R value is negative; the surface facing the light exit side is determined to be concave when the R value is positive, and convex when the R value is negative.

The utility model provides a macro lens has solved among the prior art problem that macro lens exists high image quality and miniaturization unable compromise.

Example one

As shown in fig. 1 to 80, the macro lens includes, in order from the light-in side to the light-out side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens has refractive power, the surface of the first lens facing the light-in side is concave, and the surface of the first lens facing the light-out side is convex; the second lens element with positive refractive power; the third lens element with refractive power; the fourth lens has refractive power, the surface of the fourth lens facing the light-in side is convex, and the surface of the fourth lens facing the light-out side is convex; the fifth lens element with refractive power has a concave surface facing the light incident side; the macro lens has a first object distance state and a second object distance state.

The application provides a five-piece type ultra-micro-distance zooming macro lens, which can realize clear imaging from a macro 30mm to an ultra-micro distance 3mm, and when the ultra-micro distance is 3mm, the magnification of an object image reaches 1, and the amplification of the details of a shot object can be realized.

It should be noted that the first object distance state is a minimum object distance state of the macro lens, and the second object distance state is a maximum object distance state of the macro lens.

In the present embodiment, the diameter EPD of the entrance pupil of the macro lens and the half ImgH of the diagonal length of the effective pixel area on the imaging plane of the macro lens satisfy: EPD/ImgH < 0.8. By limiting EPD/ImgH to a reasonable range, the entrance pupil diameter can be limited, contributing to better MTF performance while achieving a zoom function. Preferably 0.3< EPD/ImgH < 0.7.

In the present embodiment, the on-axis distance TTL1 from the surface of the first lens facing the light incident side to the imaging surface of the macro lens in the first object distance state and the minimum on-axis distance TOL1 from the object to the surface of the first lens facing the light incident side in the first object distance state satisfy: 1.3< TTL1/TOL1< 1.9. By limiting TTL1/TOL1 within a reasonable range, the back focus compensation effect is better realized during zooming, and the shooting quality is improved. Preferably, 1.5< TTL1/TOL1< 1.8.

In the present embodiment, an on-axis distance TD2 between the surface of the first lens facing the light-entering side to the surface of the fifth lens facing the light-exiting side in the second object distance state of the macro lens and an on-axis distance TTL2 between the surface of the first lens facing the light-entering side to the imaging surface of the macro lens in the second object distance state satisfy: 0.6< TD2/TTL2< 1.2. By limiting TD2/TTL2 within a reasonable range, the micro-lens is helped to realize the refractive power characteristic when the object distance is 30mm, and clear imaging of the micro-lens at 30mm is guaranteed. Preferably 0.7< TD2/TTL2< 1.1.

In the present embodiment, the magnification M1 of the macro lens in the first object distance state satisfies: 0.6< M1< 1.4. By limiting M1 to a reasonable range, a high magnification in the ultramicro range is achieved. Preferably 0.8< M1< 1.2.

In the present embodiment, when the macro lens is in the first object distance state, the effective focal length F1 of the macro lens, the effective focal length F3 of the third lens, and the effective focal length F4 of the fourth lens satisfy: -1.5< F1/(F3+ F4) < -0.5. By limiting F1/(F3+ F4) within a reasonable range, the focal lengths of the third lens and the fourth lens can be limited, which helps to better correct system aberration and improve MTF performance. Preferably, -1.2< F1/(F3+ F4) < -0.7.

In the present embodiment, the combined focal length F23 of the second lens and the third lens, and the effective focal length F2 of the macro lens in the second object distance state satisfy: 0.5< F23/F2< 1.2. By limiting F23/F2 within a reasonable range, the matching of the refractive power of each lens is facilitated, so that the zoom state is better realized, and better imaging performance is realized. Preferably 0.6< F23/F2< 1.1.

In the present embodiment, the radius of curvature R9 of the surface of the fifth lens facing the light entrance side and the effective focal length f5 of the fifth lens satisfy: 0.2< R9/f5< 1.2. By limiting the R9/f5 within a reasonable range, the curvature radius of the fifth lens can be limited, so that the field curvature and astigmatism in two object distance states can be corrected better, and the imaging quality of the macro lens is ensured. Preferably, 0.4< R9/f5< 1.1.

In the present embodiment, the radius of curvature R5 of the surface of the third lens facing the light incident side and the radius of curvature R3 of the surface of the second lens facing the light incident side satisfy: -1.3< R5/R3< -0.5. By limiting R5/R3 in a reasonable range, the curvature radius of the surface of the third lens facing the light incident side and the curvature radius of the light emergent side can be limited, so that the axial chromatic aberration and the spherical aberration of the macro lens are better corrected, and the imaging quality of the macro lens is ensured. Preferably, -1.1< R5/R3< -0.6.

In the present embodiment, the radius of curvature R1 of the surface of the first lens facing the light-entering side and the radius of curvature R2 of the surface of the first lens facing the light-exiting side satisfy: -0.8< (R1-R2)/(R1+ R2) <0. By limiting (R1-R2)/(R1+ R2) within a reasonable range, the curvature radius of the surface of the first lens facing the light inlet side and the curvature radius of the light outlet side can be limited, and light rays with different object distances can be better distributed. Preferably, -0.7< (R1-R2)/(R1+ R2) < -0.1.

In the present embodiment, the center thickness CT5 of the fifth lens on the optical axis of the macro lens and the center thickness CT2 of the second lens on the optical axis satisfy: CT5/CT2< 0.8. By limiting the CT5/CT2 within a reasonable range, the distribution of the refractive power can be better realized, the axial chromatic aberration and the chromatic spherical aberration under different object distances can be better corrected, and the imaging quality under different object distances can be ensured. Preferably, 0.1< CT5/CT2< 0.6.

In the embodiment, an on-axis distance SAG11 between an intersection point of the optical axis of the macro lens and the surface of the first lens facing the light incident side and an effective radius vertex of the surface of the first lens facing the light incident side and a central thickness CT1 of the first lens on the optical axis satisfy: -1.0< SAG11/CT1< 0. By limiting the SAG11/CT1 within a reasonable range, the refractive power of the first lens can be better distributed, and the imaging performance of the macro lens is ensured. Preferably, -0.8< SAG11/CT1< -0.2.

In the present embodiment, an on-axis distance SAG41 between an intersection point of a surface of the fourth lens facing the light-entering side and the optical axis of the macro lens and an effective radius vertex of the surface of the fourth lens facing the light-entering side and an on-axis distance SAG42 between an intersection point of a surface of the fourth lens facing the light-exiting side and the optical axis and an effective radius vertex of a surface of the fourth lens facing the light-exiting side satisfy: -1.2< SAG41/SAG42 <0. By controlling SAG41/SAG42 within a reasonable range, chromatic aberration correction and focal length distribution of the macro lens are facilitated. Preferably, -1.0< SAG41/SAG42< -0.2.

In the embodiment, the edge thickness ET1 of the first lens and the effective half aperture DT11 of the surface of the first lens facing the light incidence side satisfy: 0.2< ET1/DT11< 1.0. By limiting the ET1/DT11 within a reasonable range, the thickness and caliber of the first lens can be controlled, and the macro lens at different object distances can be better designed. Preferably 0.4< ET1/DT11< 0.9.

In the present embodiment, the abbe number V5 of the fifth lens and the abbe number V4 of the fourth lens satisfy: 0.4< V5/V4< 1.2. By limiting V5/V4 to a reasonable range, it helps to better eliminate axial chromatic aberration and chromatic spherical aberration. Preferably 0.5< V5/V4< 1.1.

Example two

As shown in fig. 1 to 80, the macro lens includes, in order from the light incident side to the light emergent side, a first lens, a second lens, a third transparent lens, a fourth lens, and a fifth lens. The first lens has refractive power, and the surface of the first lens facing the light emergent side is in a convex shape; the second lens has positive refractive power, and the surface of the second lens facing the light incident side is convex; the third lens has refractive power, and the surface of the third lens, which faces the light emitting side, is convex; the fourth lens element with refractive power; the fifth lens element with refractive power; the macro lens has a first object distance state and a second object distance state; when the macro lens is in the first object distance state, the F number Fno1 of the macro lens meets the following conditions: fno1< 1.6.

By reasonably controlling the positive and negative distribution of the refractive power of each lens of the macro lens, the low-order aberration of the macro lens can be effectively balanced, the tolerance sensitivity of the macro lens can be reduced, the miniaturization of the macro lens is kept, and the imaging quality of the macro lens is ensured. By limiting the Fno1 within a reasonable range, the macro lens can realize a larger aperture and obtain a larger luminous flux.

The application provides a five formula super micro-range zoom macro lens, this macro lens can realize that the macro is 30mm to super micro-range 3 mm's clear formation of image, and when super micro-range 3mm, object image magnification has reached 1, can realize the enlargeing to being shot the thing detail.

Preferably, the F-number Fno1 of the macro lens in the first object distance state satisfies: 1.0< Fno1< 1.4.

In the present embodiment, the on-axis distance TTL1 from the surface of the first lens facing the light incident side to the imaging surface of the macro lens in the first object distance state and the minimum on-axis distance TOL1 from the object to the surface of the first lens facing the light incident side in the first object distance state satisfy: 1.3< TTL1/TOL1< 1.9. By limiting TTL1/TOL1 within a reasonable range, the compensation effect of back focus is better realized during zooming, and the shooting quality is improved. Preferably, 1.5< TTL1/TOL1< 1.8.

In the present embodiment, a radius of curvature R9 of a surface of the fifth lens facing the light incident side and an effective focal length f5 of the fifth lens satisfy: 0.2< R9/f5< 1.2. By limiting R9/f5 within a reasonable range, the curvature radius of the fifth lens can be limited, which is beneficial to better correcting curvature of field and astigmatism in two object distance states and ensuring the imaging quality of the macro lens. Preferably, 0.4< R9/f5< 1.1.

In this embodiment, an on-axis distance SAG41 between an intersection point of a surface of the fourth lens facing the light entrance side and the optical axis of the macro lens and an effective radius vertex of the surface of the fourth lens facing the light entrance side and an on-axis distance SAG42 between an intersection point of the surface of the fourth lens facing the light exit side and the optical axis and an effective radius vertex of the surface of the fourth lens facing the light exit side satisfy: -1.2< SAG41/SAG42 <0. By controlling SAG41/SAG42 within a reasonable range, chromatic aberration correction and focal length distribution of the macro lens are facilitated. Preferably, -1.0< SAG41/SAG42< -0.2.

Optionally, the macro lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on an image forming surface.

The macro lens in the present application may employ a plurality of lenses, for example, the above-mentioned five lenses. By reasonably distributing the refractive power, the surface shape, the center thickness of each lens, the on-axis distance between the lenses and the like of each lens, the imaging quality of the macro lens can be effectively improved, the sensitivity of the macro lens is reduced, and the machinability of the macro lens is improved, so that the macro lens is more beneficial to production and processing and is applicable to portable electronic equipment such as smart phones.

In the present application, at least one of the mirror surfaces of each 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.

However, it will be understood by those skilled in the art that the number of lenses constituting the macro lens may be varied to obtain the respective results and advantages described in the present specification without departing from the technical solutions claimed in the present application. For example, although five lenses are exemplified in the embodiment, the macro lens is not limited to include five lenses. The macro lens may also include other numbers of lenses, as desired.

Examples of specific surface types and parameters of the macro lens that can be applied 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 eight is applicable to all embodiments of the present application.

Example one

As shown in fig. 1 to 10, a macro lens according to example one of the present application is described. Fig. 1 shows a schematic structural diagram of a macro lens of a first example in a first object distance state, and fig. 2 shows a schematic structural diagram of the macro lens of the first example in a second object distance state.

As shown in fig. 1 and fig. 2, the macro lens sequentially includes, from the light incident side to the light emitting side: the lens comprises a piece of plane glass P, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an image forming surface S13. The distance between the plane glass P and the first lens E1 is too far in the second distance state, which is not shown in the figure.

The first lens element E1 has negative refractive power, and has a concave surface S1 facing the light-incident side and a convex surface S2 facing the light-exit side. The second lens element E2 has positive refractive power, and has a convex surface S3 facing the light-incident side and a convex surface S4 facing the light-exit side. The third lens element E3 has negative refractive power, and has a concave surface S5 facing the light-incident side and a convex surface S6 facing the light-exit side. The fourth lens element E4 has positive refractive power, and a surface S7 of the fourth lens element facing the light-in side is convex, and a surface S8 of the fourth lens element facing the light-out side is convex. The fifth lens element E5 with negative refractive power has a concave surface S9 facing the light-in side and a concave surface S10 facing the light-out side. The filter E6 has a surface S11 facing the light entrance side of the filter and a surface S12 facing the light exit side of the filter. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13. The plane glass P protects the lens, and has a surface P1 facing the light incident side and a surface P2 facing the light exit side, both of which are planar.

In this example, the image height ImgH of the macro lens is 1.94 mm. In the first object distance state, the total effective focal length F1 of the macro lens is 1.40mm, and the total length TTL1 of the macro lens is 5.45 mm. In the second object distance state, the total effective focal length F2 of the macro lens is 2.56mm, and the total length TTL2 of the macro lens is 4.39 mm.

Table 1 shows a basic structural parameter table of the macro lens of example one, in which the unit of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).

TABLE 1

It should be noted that the a/B type parameter in the thickness column in table 1 indicates the value in the first object distance state/the second object distance state, and the absence of this type indicates the same in both object distance states.

In the first example, the surface of any one of the first lens E1 to the fifth lens E5 facing the light incident side and the light emergent side are aspheric surfaces, and the surface shape 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 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.

Surface type

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

4.8517E-01

-3.0217E-01

5.9508E-01

-6.0620E-01

2.9022E-01

1.4893E-02

0.0000E+00

S2

3.0976E-01

-3.2532E-01

1.8955E+00

-5.3895E+00

8.2813E+00

-5.2141E+00

0.0000E+00

S3

-9.1479E-02

-1.1586E-01

8.4727E-01

-7.6469E-01

-5.0596E+00

1.5697E+01

-1.3503E+01

0.0000E+00

S4

-1.1559E-01

2.6309E-01

-2.1556E+00

1.6191E+01

-7.5563E+01

2.2020E+02

-3.8799E+02

3.7847E+02

-1.5698E+02

S5

2.1499E-01

1.1085E+00

-1.3057E+01

8.0532E+01

-2.8520E+02

6.2059E+02

-8.2507E+02

6.1754E+02

-2.0028E+02

S6

2.5833E-01

-3.0273E-01

-3.0866E+00

2.5650E+01

-8.1460E+01

1.4176E+02

-1.4301E+02

7.8780E+01

-1.8445E+01

S7

6.4068E-02

-9.4087E-01

3.1351E+00

-4.8661E+00

3.3222E+00

5.4965E-01

-2.4476E+00

1.5007E+00

-3.1304E-01

S8

4.6519E-02

-7.1305E-02

3.4558E-01

-1.3754E+00

3.3631E+00

-4.6545E+00

3.6177E+00

-1.4453E+00

2.2769E-01

S9

1.1446E-01

-7.1127E-01

3.3597E-01

3.6306E+00

-1.0515E+01

1.3934E+01

-1.0134E+01

3.9061E+00

-6.2459E-01

S10

2.1854E-01

-1.0595E+00

2.0408E+00

-2.3765E+00

1.7821E+00

-8.6554E-01

2.6337E-01

-4.5702E-02

3.4566E-03

TABLE 2

Fig. 3 shows an on-axis aberration curve of the macro lens of example one in the first object distance state, which shows the convergent focus deviation of light rays of different wavelengths after passing through the macro lens. Fig. 4 shows astigmatism curves of the macro lens of example one in the first object distance state, which represent meridional field curvature and sagittal field curvature. Fig. 5 shows a distortion curve of the macro lens of example one in the first object distance state, which represents distortion magnitude values corresponding to different angles of view. Fig. 6 shows a chromatic aberration of magnification curve of the macro lens of the first example in the first object distance state, which represents the deviation of different image heights on the imaging surface after the light passes through the macro lens.

Fig. 7 shows an on-axis aberration curve of the macro lens of example one in the second object distance state, which indicates that the converging focal points of the light rays of different wavelengths are deviated after passing through the macro lens. Fig. 8 shows astigmatism curves of the macro lens of example one in the second object distance state, which represent meridional field curvature and sagittal field curvature. Fig. 9 shows distortion curves of the macro lens of example one in the second object distance state, which represent distortion magnitude values corresponding to different angles of view. Fig. 10 shows a chromatic aberration of magnification curve of the macro lens in the first example in the second object distance state, which represents the deviation of different image heights on the imaging surface after the light passes through the macro lens.

As can be seen from fig. 3 to 10, the macro lens according to the first example can achieve good imaging quality.

Example two

As shown in fig. 11 to 20, a macro lens of example two of the present application is described. In this example and the following examples, descriptions of parts similar to example one will be omitted for the sake of brevity. Fig. 11 shows a schematic structural diagram of the macro lens of the second example in the first object distance state, and fig. 12 shows a schematic structural diagram of the macro lens of the second example in the second object distance state.

As shown in fig. 11 and 12, the macro lens sequentially includes, from the light incident side to the light emitting side: the lens comprises a piece of plane glass P, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6 and an image forming surface S13. The distance between the plane glass P and the first lens E1 is too far in the second distance state, which is not shown in the figure.

The first lens element E1 has negative refractive power, and has a concave surface S1 facing the light-incident side and a convex surface S2 facing the light-exit side. The second lens element E2 has positive refractive power, and has a convex surface S3 facing the light-incident side and a convex surface S4 facing the light-exit side. The third lens element E3 has negative refractive power, and has a concave surface S5 facing the light-incident side and a convex surface S6 facing the light-exit side. The fourth lens element E4 has positive refractive power, and has a convex surface S7 facing the light-incident side and a convex surface S8 facing the light-exit side. The fifth lens element E5 with negative refractive power has a concave surface S9 facing the light-in side and a concave surface S10 facing the light-out side. The filter E6 has a surface S11 facing the light entrance side of the filter and a surface S12 facing the light exit side of the filter. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13. The plane glass P protects the lens, and has a surface P1 facing the light incident side and a surface P2 facing the light exit side, both of which are planar.

In this example, the image height ImgH of the macro lens is 1.94 mm. In the first object distance state, the total effective focal length F1 of the macro lens is 1.28mm, and the total length TTL1 of the macro lens is 5.38 mm. In the second object distance state, the total effective focal length F2 of the macro lens is 2.49mm, and the total length TTL2 of the macro lens is 4.36 mm.

Table 3 shows a basic structural parameter table of the macro lens of example two, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).

TABLE 3

It should be noted that the a/B type parameter in the thickness column in table 3 indicates the value in the first object distance state/the second object distance state, and the absence of this type indicates the same in both object distance states.

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.

TABLE 4

Fig. 13 shows an on-axis aberration curve of the macro lens of example two in the first object distance state, which indicates the deviation of the convergent focus of light rays of different wavelengths after passing through the macro lens. Fig. 14 shows astigmatism curves of the macro lens of example two in the first object distance state, which represent meridional field curvature and sagittal field curvature. Fig. 15 shows a distortion curve of the macro lens of example two in the first object distance state, which represents distortion magnitude values corresponding to different angles of view. Fig. 16 shows a chromatic aberration of magnification curve of the macro lens of example two in the first object distance state, which represents the deviation of different image heights on the imaging surface after the light passes through the macro lens.

Fig. 17 shows an on-axis aberration curve in the second object distance state of the macro lens of example two, which indicates that the converging focal points of the light rays of different wavelengths are deviated after passing through the macro lens. Fig. 18 shows astigmatism curves of the macro lens of example two in the second object distance state, which represent meridional field curvature and sagittal field curvature. Fig. 19 shows distortion curves of the macro lens of example two in the second object distance state, which indicate distortion magnitude values corresponding to different angles of view. Fig. 20 shows a chromatic aberration of magnification curve of the macro lens of example two in the second object distance state, which represents the deviation of different image heights on the imaging surface after the light passes through the macro lens.

As can be seen from fig. 13 to 20, the macro lens according to example two can achieve good imaging quality.

Example III

As shown in fig. 21 to 30, a macro lens of example three of the present application is described. In this example and the following examples, descriptions of parts similar to example one will be omitted for the sake of brevity. Fig. 21 shows a schematic structural diagram of a macro lens of example three in a first object distance state, and fig. 22 shows a schematic structural diagram of a macro lens of example three in a second object distance state.

As shown in fig. 21 and 22, the macro lens includes, in order from the light incident side to the light emergent side, a planar glass P, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane S13. The distance between the plane glass P and the first lens E1 is too far in the second distance state, which is not shown in the figure.

The first lens element E1 has negative refractive power, and has a concave surface S1 facing the light-incident side and a convex surface S2 facing the light-exit side. The second lens element E2 has positive refractive power, and has a convex surface S3 facing the light-incident side and a convex surface S4 facing the light-exit side. The third lens element E3 has negative refractive power, and has a concave surface S5 facing the light-incident side and a convex surface S6 facing the light-exit side. The fourth lens element E4 has positive refractive power, and has a convex surface S7 facing the light-incident side and a convex surface S8 facing the light-exit side. The fifth lens element E5 with negative refractive power has a concave surface S9 facing the light-in side and a concave surface S10 facing the light-out side. The filter E6 has a surface S11 facing the light entrance side of the filter and a surface S12 facing the light exit side of the filter. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13. The plane glass P protects the lens, and has a surface P1 facing the light entrance side of the plane glass and a surface P2 facing the light exit side of the plane glass, both of which are planar.

In this example, the image height ImgH of the macro lens is 1.94 mm. In the first object distance state, the total effective focal length F1 of the macro lens is 1.26mm, and the total length TTL1 of the macro lens is 5.27 mm. In the second object distance state, the total effective focal length F2 of the macro lens is 2.46mm, and the total length TTL2 of the macro lens is 4.27 mm.

Table 5 shows a basic structural parameter table of the macro lens of example three, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).

TABLE 5

It should be noted that the a/B type parameter in the thickness column in table 5 indicates the value in the first object distance state/the second object distance state, and the absence of this type indicates the same in both object distance states.

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.

TABLE 6

Fig. 23 shows an on-axis aberration curve in the first object distance state for the macro lens of example three, which represents the convergent focus deviation of light rays of different wavelengths after passing through the macro lens. Fig. 24 shows astigmatism curves of the macro lens of example three in the first object distance state, which represent meridional field curvature and sagittal field curvature. Fig. 25 shows a distortion curve of the macro lens of example three in the first object distance state, which represents distortion magnitude values corresponding to different angles of view. Fig. 26 shows a chromatic aberration of magnification curve of the macro lens of example three in the first object distance state, which represents the deviation of different image heights on the imaging surface after the light passes through the macro lens.

Fig. 27 shows an on-axis aberration curve in the second object distance state for the macro lens of example three, which indicates that the converging focal points of light rays of different wavelengths are deviated after passing through the macro lens. Fig. 28 shows astigmatism curves of the macro lens of example three in the second object distance state, which represent meridional field curvature and sagittal field curvature. Fig. 29 shows distortion curves of the macro lens of example three in the second object distance state, which represent distortion magnitude values corresponding to different angles of view. Fig. 30 shows a chromatic aberration of magnification curve of the macro lens of example three in the second object distance state, which represents the deviation of different image heights on the imaging surface after the light passes through the macro lens.

As can be seen from fig. 23 to 30, the macro lens according to the third example can achieve good imaging quality.

Example four

As shown in fig. 31 to 40, a macro lens of example four of the present application is described. In this example and the following examples, descriptions of parts similar to example one will be omitted for the sake of brevity. Fig. 31 shows a schematic structural diagram of a macro lens of example four in a first object distance state, and fig. 32 shows a schematic structural diagram of the macro lens of example four in a second object distance state.

As shown in fig. 31 and 32, the macro lens includes, in order from the light incident side to the light exiting side, a planar glass P, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane S13. The distance between the plane glass P and the first lens E1 is too far in the second distance state, which is not shown in the figure.

The first lens element E1 has negative refractive power, and has a concave surface S1 facing the light-incident side and a convex surface S2 facing the light-exit side. The second lens element E2 has positive refractive power, and has a convex surface S3 facing the light-incident side and a convex surface S4 facing the light-exit side. The third lens element E3 has negative refractive power, and has a concave surface S5 facing the light-incident side and a convex surface S6 facing the light-exit side. The fourth lens element E4 has positive refractive power, and has a convex surface S7 facing the light-incident side and a convex surface S8 facing the light-exit side. The fifth lens element E5 with negative refractive power has a concave surface S9 facing the light-in side and a concave surface S10 facing the light-out side. The filter E6 has a surface S11 facing the light entrance side of the filter and a surface S12 facing the light exit side of the filter. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13. The plane glass P protects the lens, and has a surface P1 facing the light incident side and a surface P2 facing the light exit side, both of which are planar.

In this example, the image height ImgH of the macro lens is 1.94 mm. In the first object distance state, the total effective focal length F1 of the macro lens is 1.28mm, and the total length TTL1 of the macro lens is 5.49 mm. In the second object distance state, the total effective focal length F2 of the macro lens is 2.63mm, and the total length TTL2 of the macro lens is 4.33 mm.

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

TABLE 7

It should be noted that the a/B type parameter in the thickness column in table 7 indicates the value in the first object distance state/the second object distance state, and the absence of this type indicates that the values are the same in both object distance states.

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.

Surface type

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

6.4526E-01

-8.6795E-01

1.9050E+00

-2.8445E+00

2.3901E+00

-8.1697E-01

0.0000E+00

S2

3.9089E-01

-5.7358E-01

2.5772E+00

-6.7828E+00

1.0023E+01

-6.2283E+00

0.0000E+00

S3

-1.6849E-01

1.6146E-01

-5.2715E-01

5.8246E+00

-2.4972E+01

4.8357E+01

-3.5646E+01

0.0000E+00

S4

-1.0749E-01

1.1037E-01

-7.0147E-01

9.7696E+00

-6.5786E+01

2.4673E+02

-5.2228E+02

5.8606E+02

-2.7142E+02

S5

2.6805E-01

8.7412E-01

-1.1108E+01

7.2554E+01

-2.8496E+02

7.0921E+02

-1.0904E+03

9.3931E+02

-3.4582E+02

S6

1.9804E-01

3.6045E-01

-4.4606E+00

2.3118E+01

-6.6274E+01

1.1768E+02

-1.2963E+02

8.0804E+01

-2.1717E+01

S7

-8.0411E-02

1.5760E-01

-1.0609E+00

4.9756E+00

-1.1911E+01

1.6512E+01

-1.3395E+01

5.9083E+00

-1.0958E+00

S8

4.0925E-02

-1.6323E-01

1.0551E+00

-3.9113E+00

8.8597E+00

-1.2179E+01

9.9143E+00

-4.3240E+00

7.6997E-01

S9

-2.8263E-01

4.7151E-01

-2.3923E+00

9.2499E+00

-2.0101E+01

2.5331E+01

-1.8518E+01

7.2871E+00

-1.1915E+00

S10

-1.0059E-02

-4.6556E-01

1.2728E+00

-1.8300E+00

1.6135E+00

-9.0239E-01

3.1332E-01

-6.1804E-02

5.3060E-03

TABLE 8

Fig. 33 shows an on-axis aberration curve in the first object distance state for the macro lens of example four, which represents the convergent focus deviation of light rays of different wavelengths after passing through the macro lens. Fig. 34 shows astigmatism curves of the macro lens of example four in the first object distance state, which represent meridional field curvature and sagittal field curvature. Fig. 35 shows a distortion curve of the macro lens of example four in the first object distance state, which represents distortion magnitude values corresponding to different angles of view. Fig. 36 shows a chromatic aberration of magnification curve in the first object distance state for the macro lens of example four, which represents the deviation of different image heights on the imaging plane after the light passes through the macro lens.

Fig. 37 shows an on-axis aberration curve in the second object distance state for the macro lens of example four, which indicates that the converging focal points of the light rays of different wavelengths are deviated after passing through the macro lens. Fig. 38 shows astigmatism curves of the macro lens of example four in the second object distance state, which represent meridional field curvature and sagittal field curvature. Fig. 39 shows a distortion curve of the macro lens of example four in the second object distance state, which represents distortion magnitude values corresponding to different angles of view. Fig. 40 shows a chromatic aberration of magnification curve of the macro lens of example four in the second object distance state, which represents the deviation of different image heights on the imaging surface after the light passes through the macro lens.

As can be seen from fig. 33 to 40, the macro lens according to example four can achieve good imaging quality.

Example five

As shown in fig. 41 to 50, a macro lens of example five of the present application is described. In this example and the following examples, descriptions of parts similar to example one will be omitted for the sake of brevity. Fig. 41 shows a schematic structural diagram of the macro lens of example five in the first object distance state, and fig. 42 shows a schematic structural diagram of the macro lens of example five in the second object distance state.

As shown in fig. 41 and 42, the macro lens includes, in order from the light incident side to the light exiting side, a planar glass P, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane S13. The distance between the plane glass P and the first lens E1 is too far in the second distance state, which is not shown in the figure.

The first lens element E1 has negative refractive power, and has a concave surface S1 facing the light-incident side and a convex surface S2 facing the light-exit side. The second lens element E2 has positive refractive power, and has a convex surface S3 facing the light-incident side and a convex surface S4 facing the light-exit side. The third lens element E3 has negative refractive power, and has a concave surface S5 facing the light-incident side and a convex surface S6 facing the light-exit side. The fourth lens element E4 has positive refractive power, and has a convex surface S7 facing the light-incident side and a convex surface S8 facing the light-exit side. The fifth lens element E5 has negative refractive power, and its surface facing the light-entering side S9 is concave, and its surface facing the light-exiting side S10 is convex. The filter E6 has a surface S11 facing the light entrance side of the filter and a surface S12 facing the light exit side of the filter. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13. The plane glass P protects the lens, and has a surface P1 facing the light incident side and a surface P2 facing the light exit side, both of which are planar.

In this example, the image height ImgH of the macro lens is 1.94 mm. In the first object distance state, the total effective focal length F1 of the macro lens is 1.37mm, and the total length TTL1 of the macro lens is 5.45 mm. In the second object distance state, the total effective focal length F2 of the macro lens is 2.60mm, and the total length TTL2 of the macro lens is 4.33 mm.

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

TABLE 9

It should be noted that the parameter in the form of a/B in the thickness column in table 9 indicates the value in the first object distance state/the second object distance state, and the absence of this form indicates that the values are the same in both object distance states.

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.

Surface type

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

5.4015E-01

-4.6880E-01

1.0449E+00

-1.3852E+00

9.9557E-01

-2.4560E-01

0.0000E+00

S2

3.0912E-01

-1.3320E-01

7.7250E-01

-1.8614E+00

2.5562E+00

-1.4745E+00

0.0000E+00

S3

-1.5217E-01

3.0718E-01

-1.2617E+00

6.1540E+00

-1.8300E+01

2.8496E+01

-1.7813E+01

0.0000E+00

S4

-1.0743E-01

1.5402E-01

-9.3611E-01

7.0970E+00

-3.2898E+01

9.5624E+01

-1.6811E+02

1.6395E+02

-6.8114E+01

S5

2.5033E-01

7.6447E-01

-1.0112E+01

6.3713E+01

-2.2363E+02

4.7509E+02

-6.0959E+02

4.3681E+02

-1.3521E+02

S6

2.3540E-01

-2.1267E-01

-2.4085E+00

1.9911E+01

-6.2960E+01

1.0767E+02

-1.0469E+02

5.4317E+01

-1.1690E+01

S7

6.0397E-03

-5.6763E-01

2.0881E+00

-3.1547E+00

1.4289E+00

2.1420E+00

-3.4665E+00

1.9282E+00

-3.9731E-01

S8

4.1191E-02

-5.3272E-02

2.7608E-01

-9.5693E-01

2.1325E+00

-2.6716E+00

1.7636E+00

-4.8164E-01

1.1738E-02

S9

2.3430E-01

-1.0399E+00

1.5814E+00

7.8717E-01

-6.6194E+00

1.0652E+01

-8.4423E+00

3.4000E+00

-5.5302E-01

S10

3.0011E-01

-1.2268E+00

2.4434E+00

-3.0214E+00

2.4225E+00

-1.2617E+00

4.1244E-01

-7.6957E-02

6.2599E-03

Watch 10

Fig. 43 shows an on-axis aberration curve in the first object distance state for the macro lens of example five, which represents the convergent focus deviation of light rays of different wavelengths after passing through the macro lens. Fig. 44 shows astigmatism curves of the macro lens of example five in the first object distance state, which represent meridional field curvature and sagittal field curvature. Fig. 45 shows a distortion curve of the macro lens of example five in the first object distance state, which represents distortion magnitude values corresponding to different angles of view. Fig. 46 shows a chromatic aberration of magnification curve in the first object distance state for the macro lens of example five, which represents the deviation of different image heights on the imaging plane after the light passes through the macro lens.

Fig. 47 shows an on-axis chromatic aberration curve in the second object distance state for the macro lens of example five, which represents the convergent focus deviation of light rays of different wavelengths after passing through the macro lens. Fig. 48 shows astigmatism curves of the macro lens of example five in the second object distance state, which represent meridional field curvature and sagittal field curvature. Fig. 49 shows distortion curves of the macro lens of example five in the second object distance state, which represent distortion magnitude values corresponding to different angles of view. Fig. 50 shows a chromatic aberration of magnification curve of the macro lens of example five in the second object distance state, which represents the deviation of different image heights on the imaging surface after the light passes through the macro lens.

As can be seen from fig. 43 to 50, the macro lens according to example five can achieve good imaging quality.

Example six

As shown in fig. 51 to 60, a macro lens of example six of the present application is described. Fig. 51 shows a schematic structural diagram of a macro lens of example six in a first object distance state, and fig. 52 shows a schematic structural diagram of a macro lens of example six in a second object distance state.

As shown in fig. 51 and 52, the macro lens includes, in order from the light incident side to the light emergent side, a planar glass P, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane S13. The distance between the plane glass P and the first lens E1 is too far in the second distance state, which is not shown in the figure.

The first lens element E1 has negative refractive power, and has a concave surface S1 facing the light-incident side and a convex surface S2 facing the light-exit side. The second lens element E2 has positive refractive power, and has a convex surface S3 facing the light-incident side and a convex surface S4 facing the light-exit side. The third lens element E3 has negative refractive power, and its surface S5 facing the light incident side is concave, and its surface S6 facing the light emergent side is convex. The fourth lens element E4 has positive refractive power, and has a convex surface S7 facing the light-incident side and a convex surface S8 facing the light-exit side. The fifth lens element E5 with negative refractive power has a concave surface S9 facing the light-in side and a concave surface S10 facing the light-out side. The filter E6 has a surface S11 facing the light entrance side of the filter and a surface S12 facing the light exit side of the filter. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13. The plane glass P protects the lens, and has a surface P1 facing the light incident side and a surface P2 facing the light exit side, both of which are planar.

In this example, the image height ImgH of the macro lens is 1.94 mm. In the first object distance state, the total effective focal length F1 of the macro lens is 1.39mm, and the total length TTL1 of the macro lens is 5.44 mm. In the second object distance state, the total effective focal length F2 of the macro lens is 2.59mm, and the total length TTL2 of the macro lens is 4.36 mm.

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

TABLE 11

It should be noted that the a/B type parameter in the thickness column in table 11 indicates the value in the first object distance state/the second object distance state, and the absence of this type indicates the same in both object distance states.

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.

Surface type

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

5.8149E-01

-5.6633E-01

1.2366E+00

-1.6420E+00

1.2203E+00

-3.3296E-01

0.0000E+00

S2

3.0961E-01

-1.0596E-01

5.7007E-01

-1.3565E+00

1.9333E+00

-1.1764E+00

0.0000E+00

S3

-1.7489E-01

3.9316E-01

-1.4575E+00

6.0668E+00

-1.6507E+01

2.4525E+01

-1.4922E+01

0.0000E+00

S4

-1.1060E-01

2.8746E-01

-2.7505E+00

2.1858E+01

-1.0438E+02

3.0620E+02

-5.3797E+02

5.1979E+02

-2.1230E+02

S5

2.7057E-01

6.5819E-01

-9.5158E+00

6.0879E+01

-2.1352E+02

4.5037E+02

-5.7258E+02

4.0674E+02

-1.2497E+02

S6

2.4862E-01

-3.1874E-01

-1.8883E+00

1.8755E+01

-6.2297E+01

1.1004E+02

-1.1073E+02

6.0034E+01

-1.3686E+01

S7

1.2468E-04

-6.2957E-01

2.5973E+00

-4.8792E+00

4.9368E+00

-2.3324E+00

-2.0943E-03

4.4038E-01

-1.2405E-01

S8

4.1196E-02

-7.1349E-02

3.7123E-01

-1.2465E+00

2.7489E+00

-3.5535E+00

2.5959E+00

-9.4900E-01

1.2685E-01

S9

2.1451E-01

-9.0755E-01

1.0100E+00

2.1012E+00

-8.3743E+00

1.2067E+01

-9.1378E+00

3.6045E+00

-5.8369E-01

S10

2.8604E-01

-1.1473E+00

2.1951E+00

-2.5971E+00

1.9906E+00

-9.9124E-01

3.0993E-01

-5.5359E-02

4.3158E-03

TABLE 12

Fig. 53 shows an on-axis aberration curve in the first object distance state for the macro lens of example six, which represents the convergent focus deviation of light rays of different wavelengths after passing through the macro lens. Fig. 54 shows astigmatism curves of the macro lens of example six in the first object distance state, which represent meridional field curvature and sagittal field curvature. Fig. 55 shows distortion curves of the macro lens of example six in the first object distance state, which represent distortion magnitude values corresponding to different angles of view. Fig. 56 shows a chromatic aberration of magnification curve in the first object distance state for the macro lens of example six, which represents the deviation of different image heights on the imaging surface after the light passes through the macro lens.

Fig. 57 shows an on-axis aberration curve in the second object distance state for the macro lens of example six, which represents the convergent focus deviation of light rays of different wavelengths after passing through the macro lens. Fig. 58 shows astigmatism curves of the macro lens of example six in the second object distance state, which represent meridional field curvature and sagittal field curvature. Fig. 59 shows distortion curves of the macro lens of example six in the second object distance state, which represent distortion magnitude values corresponding to different angles of view. Fig. 60 shows a chromatic aberration of magnification curve in the second object distance state for the macro lens of example six, which represents the deviation of different image heights on the imaging surface after the light passes through the macro lens.

As can be seen from fig. 53 to 60, the macro lens according to the sixth example can achieve good imaging quality.

Example seven

As shown in fig. 61 to 70, a macro lens of example seven of the present application is described. Fig. 61 shows a schematic structural diagram of the macro lens of example seven in the first object distance state, and fig. 62 shows a schematic structural diagram of the macro lens of example seven in the second object distance state.

As shown in fig. 61 and 62, the macro lens includes, in order from the light incident side to the light exiting side, a planar glass P, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane S13. The distance between the plane glass P and the first lens E1 is too far in the second distance state, which is not shown in the figure.

The first lens element E1 has negative refractive power, and has a concave surface S1 facing the light-incident side and a convex surface S2 facing the light-exit side. The second lens element E2 has positive refractive power, and has a convex surface S3 facing the light-incident side and a convex surface S4 facing the light-exit side. The third lens element E3 has negative refractive power, and has a concave surface S5 facing the light-incident side and a convex surface S6 facing the light-exit side. The fourth lens element E4 has positive refractive power, and a surface S7 of the fourth lens element facing the light-in side is convex, and a surface S8 of the fourth lens element facing the light-out side is convex. The fifth lens element E5 with negative refractive power has a concave surface S9 facing the light-in side and a concave surface S10 facing the light-out side. The filter E6 has a surface S11 facing the light entrance side of the filter and a surface S12 facing the light exit side of the filter. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13. The plane glass P protects the lens, and has a surface P1 facing the light incident side and a surface P2 facing the light exit side, both of which are planar.

In this example, the image height ImgH of the macro lens is 1.94 mm. In the first object distance state, the total effective focal length F1 of the macro lens is 1.42mm, and the total length TTL1 of the macro lens is 5.45 mm. In the second object distance state, the total effective focal length F2 of the macro lens is 2.55mm, and the total length TTL2 of the macro lens is 4.38 mm.

Table 13 shows a basic structural parameter table of the macro lens of example seven, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).

Watch 13

It should be noted that the parameter in the form of a/B in the thickness column in table 13 indicates the value in the first object distance state/the second object distance state, and the absence of this form indicates that the values are the same in both object distance states.

Table 14 shows the high-order term coefficients that can be used for each of the aspherical mirror surfaces in example seven, wherein each of the aspherical mirror surface types can be defined by formula (1) given in example one above.

Surface type

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

5.1735E-01

-3.7722E-01

7.1283E-01

-7.2755E-01

3.4552E-01

1.3611E-02

0.0000E+00

S2

3.3001E-01

-4.3939E-01

2.4275E+00

-6.9317E+00

1.0700E+01

-6.7827E+00

0.0000E+00

S3

-9.3374E-02

-1.9340E-01

1.3951E+00

-2.8547E+00

-2.5356E-02

8.6927E+00

-9.2001E+00

0.0000E+00

S4

-1.1806E-01

2.1817E-01

-1.6618E+00

1.3678E+01

-6.7719E+01

2.0561E+02

-3.7270E+02

3.7094E+02

-1.5605E+02

S5

2.4055E-01

1.1320E+00

-1.4717E+01

9.4401E+01

-3.4524E+02

7.7459E+02

-1.0607E+03

8.1647E+02

-2.7168E+02

S6

2.8111E-01

-4.3208E-01

-3.0587E+00

2.8043E+01

-9.2413E+01

1.6570E+02

-1.7194E+02

9.7308E+01

-2.3362E+01

S7

6.3699E-02

-1.0391E+00

3.6405E+00

-6.1254E+00

5.1787E+00

-1.0712E+00

-1.6563E+00

1.3170E+00

-3.0144E-01

S8

4.8295E-02

-7.7942E-02

4.1846E-01

-1.7141E+00

4.2709E+00

-6.0429E+00

4.8300E+00

-1.9941E+00

3.2568E-01

S9

2.5253E-01

-1.0933E+00

1.2849E+00

2.1804E+00

-9.3402E+00

1.3649E+01

-1.0389E+01

4.1058E+00

-6.6537E-01

S10

3.4670E-01

-1.3700E+00

2.6191E+00

-3.1037E+00

2.3819E+00

-1.1858E+00

3.7010E-01

-6.5906E-02

5.1169E-03

TABLE 14

Fig. 63 shows an on-axis aberration curve in the first object distance state for the macro lens of example seven, which represents the convergent focus deviation of light rays of different wavelengths after passing through the macro lens. Fig. 64 shows an astigmatism curve in the first object distance state, which represents meridional field curvature and sagittal field curvature, of the macro lens of example seven. Fig. 65 shows a distortion curve of the macro lens of example seven in the first object distance state, which represents distortion magnitude values corresponding to different angles of view. Fig. 66 shows a chromatic aberration of magnification curve in the first object distance state for the macro lens of example seven, which represents the deviation of different image heights on the imaging plane after the light passes through the macro lens.

Fig. 67 shows an on-axis chromatic aberration curve in the second object distance state for the macro lens of example seven, which indicates that the convergent focal points of light rays of different wavelengths deviate after passing through the macro lens. Fig. 68 shows astigmatism curves of the macro lens of example seven in the second object distance state, which represent meridional field curvature and sagittal field curvature. Fig. 69 shows a distortion curve in the second object distance state of the macro lens of example seven, which represents distortion magnitude values corresponding to different angles of view. Fig. 70 shows a chromatic aberration of magnification curve in the second object distance state for the macro lens of example seven, which represents the deviation of different image heights on the imaging surface after the light passes through the macro lens.

As can be seen from fig. 63 to 70, the macro lens according to example seven can achieve good imaging quality.

Example eight

As shown in fig. 71 to 80, a macro lens of example eight of the present application is described. Fig. 71 shows a schematic structural diagram of the macro lens of example eight in the first object distance state, and fig. 72 shows a schematic structural diagram of the macro lens of example eight in the second object distance state.

As shown in fig. 71 and 72, the macro lens includes, in order from the light incident side to the light emitting side, a planar glass P, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image plane S13. The distance between the plane glass P and the first lens E1 is too far in the second distance state, which is not shown in the figure.

The first lens element E1 has negative refractive power, and has a concave surface S1 facing the light-incident side and a convex surface S2 facing the light-exit side. The second lens element E2 has positive refractive power, and has a convex surface S3 facing the light-incident side and a convex surface S4 facing the light-exit side. The third lens element E3 has negative refractive power, and has a concave surface S5 facing the light-incident side and a convex surface S6 facing the light-exit side. The fourth lens element E4 has positive refractive power, and has a convex surface S7 facing the light-incident side and a convex surface S8 facing the light-exit side. The fifth lens element E5 has negative refractive power, and a surface S9 of the fifth lens element facing the light-in side is concave, and a surface S10 of the fifth lens element facing the light-out side is concave. The filter E6 has a surface S11 facing the light entrance side of the filter and a surface S12 facing the light exit side of the filter. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging surface S13. The plane glass P protects the lens, and has a surface P1 facing the light incident side and a surface P2 facing the light exit side, both of which are planar.

In this example, the image height ImgH of the macro lens is 1.94 mm. In the first object distance state, the total effective focal length F1 of the macro lens is 1.42mm, and the total length TTL1 of the macro lens is 5.45 mm. In the second object distance state, the total effective focal length F2 of the macro lens is 2.54mm, and the total length TTL2 of the macro lens is 4.38 mm.

Table 15 shows a basic structural parameter table of the macro lens of example eight, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).

Watch 15

It should be noted that the parameter in the form of a/B in the thickness column in table 15 indicates the value in the first object distance state/the second object distance state, and the absence of this form indicates that the values are the same in both object distance states.

Table 16 shows the high-order term coefficients that can be used for each aspherical mirror surface in example eight, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.

TABLE 16

Fig. 73 shows an on-axis aberration curve in the first object distance state for the macro lens of example eight, which represents the convergent focus deviation of light rays of different wavelengths after passing through the macro lens. Fig. 74 shows astigmatism curves of the macro lens of example eight in the first object distance state, which represent meridional field curvature and sagittal field curvature. Fig. 75 shows a distortion curve of the macro lens of example eight in the first object distance state, which represents distortion magnitude values corresponding to different angles of view. Fig. 76 shows a chromatic aberration of magnification curve in the first object distance state for the macro lens of example eight, which represents the deviation of different image heights on the imaging surface after the light passes through the macro lens.

Fig. 77 shows an axial chromatic aberration curve in the second object distance state of the macro lens of example eight, which represents the deviation of the convergence focal point of light rays of different wavelengths after passing through the macro lens. Fig. 78 shows astigmatism curves in the second object distance state of the macro lens of example eight, which represent meridional field curvature and sagittal field curvature. Fig. 79 shows distortion curves of the macro lens of example eight in the second object distance state, which represent distortion magnitude values corresponding to different angles of view. Fig. 80 shows a chromatic aberration of magnification curve in the second object distance state for the macro lens of example eight, which represents the deviation of different image heights on the imaging surface after the light passes through the macro lens.

As can be seen from fig. 73 to 80, the macro lens according to example eight can achieve good imaging quality.

To sum up, examples one to eight satisfy the relationships shown in table 17, respectively.

Conditional expressions/examples	1	2	3	4	5	6	7	8
									Fno1	1.31	1.37	1.36	1.24	1.26	1.28	1.32	1.37
EPD/ImgH	0.55	0.48	0.48	0.53	0.56	0.56	0.55	0.54
									TTL1/TOL1	1.68	1.69	1.66	1.71	1.68	1.67	1.68	1.68
TD2/TTL2	0.95	0.96	0.96	0.95	0.96	0.96	0.83	0.96
									M1	0.98	0.98	0.98	1.08	1.04	1.01	0.98	0.98
F1/(f3+f4)	-0.87	-1.01	-0.96	-0.98	-0.86	-0.90	-0.98	-0.98
									f23/F2	0.83	0.74	0.73	0.87	0.95	0.94	0.84	0.97
R9/f5	0.66	0.85	0.87	0.90	0.55	0.57	0.55	0.54
									R5/R3	-0.74	-0.95	-0.98	-0.86	-0.74	-0.76	-0.76	-0.76
(R1-R2)/(R1+R2)	-0.25	-0.47	-0.48	-0.30	-0.24	-0.25	-0.27	-0.27
									CT5/CT2	0.40	0.28	0.28	0.38	0.40	0.39	0.41	0.41
SAG11/CT1	-0.57	-0.35	-0.34	-0.56	-0.68	-0.69	-0.56	-0.56
									SAG41/SAG42	-0.57	-0.38	-0.35	-0.83	-0.69	-0.77	-0.76	-0.77
ET1/DT11	0.61	0.73	0.70	0.53	0.51	0.52	0.62	0.62
									V5/V4	0.76	0.61	0.62	0.71	0.78	0.77	1.01	1.01

Table 17 table 18 gives effective focal lengths f1 to f5 of respective lenses of the macro lenses of example one to example eight.

Watch 18

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

It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to 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. A macro lens, comprising, in order from an incident side to an outgoing side of the macro lens:

the first lens has refractive power, the surface of the first lens facing the light-in side is concave, and the surface of the first lens facing the light-out side is convex;

a second lens element with positive refractive power;

a third lens element with refractive power;

the fourth lens element with refractive power has a convex surface facing the light incident side, and a convex surface facing the light emergent side;

the fifth lens element with refractive power has a concave surface facing the light incident side;

the macro lens has a first object distance state and a second object distance state.

2. The macro lens of claim 1, wherein an entrance pupil diameter EPD of the macro lens and an ImgH of a half of a diagonal length of an effective pixel area on an imaging surface of the macro lens satisfy: EPD/ImgH < 0.8.

3. The macro lens of claim 1, wherein an on-axis distance TTL1 from a light-entry-side surface of the first lens to an imaging surface of the macro lens in the first object distance state of the macro lens and a minimum on-axis distance TOL1 from a subject to the light-entry-side surface of the first lens in the first object distance state of the macro lens satisfy: 1.3< TTL1/TOL1< 1.9.

4. The macro lens of claim 1, wherein an on-axis distance TD2 between the surface of the first lens facing the light-entering side to the surface of the fifth lens facing the light-exiting side in the second object distance state of the macro lens and an on-axis distance TTL2 between the surface of the first lens facing the light-entering side to the imaging plane of the macro lens in the second object distance state satisfy: 0.6< TD2/TTL2< 1.2.

5. The macro lens according to claim 1, wherein a magnification M1 of the macro lens in the first object distance state satisfies: 0.6< M1< 1.4.

6. The macro lens according to claim 1, wherein the effective focal length of the macro lens F1, F3 and F4 in the first object distance state satisfy: -1.5< F1/(F3+ F4) < -0.5.

7. The macro lens according to claim 1, wherein a combined focal length F23 of the second and third lenses, an effective focal length F2 of the macro lens when the macro lens is in a second object state, satisfy: 0.5< F23/F2< 1.2.

8. The macro lens of claim 1, wherein a curvature radius R9 of a surface of the fifth lens facing the light incident side and an effective focal length f5 of the fifth lens satisfy: 0.2< R9/f5< 1.2.

9. The macro lens according to claim 1, wherein the radius of curvature R5 of the surface of the third lens facing the light incident side and the radius of curvature R3 of the surface of the second lens facing the light incident side satisfy: -1.3< R5/R3< -0.5.

10. The macro lens according to claim 1, wherein a radius of curvature R1 of a surface of the first lens facing the light incident side and a radius of curvature R2 of a surface of the first lens facing the light exit side satisfy: -0.8< (R1-R2)/(R1+ R2) <0.

11. The macro lens according to claim 1, wherein a center thickness CT5 of the fifth lens on an optical axis of the macro lens and a center thickness CT2 of the second lens on the optical axis satisfy: CT5/CT2< 0.8.

12. The macro-lens of claim 1, wherein an on-axis distance SAG11 between an intersection point of an optical axis of the macro-lens and a surface of the first lens facing the light entrance side and an effective radius vertex of the surface of the first lens facing the light entrance side satisfies a central thickness CT1 of the first lens on the optical axis: -1.0< SAG11/CT1< 0.

13. The macro-lens of claim 1, wherein an on-axis distance SAG41 between an intersection point of a surface of the fourth lens facing the light-entering side and an optical axis of the macro-lens and an effective radius vertex of the surface of the fourth lens facing the light-entering side and an on-axis distance SAG42 between an intersection point of a surface of the fourth lens facing the light-exiting side and the optical axis and an effective radius vertex of a surface of the fourth lens facing the light-exiting side satisfy: -1.2< SAG41/SAG42 <0.

14. The macro lens according to claim 1, wherein the edge thickness ET1 of the first lens and the effective half aperture DT11 of the surface of the first lens facing the light incident side satisfy: 0.2< ET1/DT11< 1.0.

15. The macro lens according to claim 1, wherein an abbe number V5 of the fifth lens and an abbe number V4 of the fourth lens satisfy: 0.4< V5/V4< 1.2.

16. A macro lens, comprising, in order from an incident side to an outgoing side of the macro lens:

the first lens has refractive power, and the surface of the first lens facing the light emitting side is in a convex shape;

the second lens has positive refractive power, and the surface of the second lens facing the light incidence side is in a convex shape;

the third lens element with refractive power has a convex surface facing the light exit side;

a fourth lens element with refractive power;

a fifth lens element with refractive power;

the macro lens has a first object distance state and a second object distance state;

when the macro lens is in the first object distance state, the F number Fno1 of the macro lens meets the following conditions: fno1< 1.6.

17. The macro lens of claim 16, wherein an entrance pupil diameter EPD of the macro lens and ImgH, which is half of a diagonal length of an effective pixel area on an imaging surface of the macro lens, satisfy: EPD/ImgH < 0.8.

18. The macro lens of claim 16, wherein an on-axis distance TTL1 from a light-entry-side surface of the first lens to an imaging surface of the macro lens in the first object distance state thereof and a minimum on-axis distance TOL1 from an object to the light-entry-side surface of the first lens in the first object distance state thereof satisfy: 1.3< TTL1/TOL1< 1.9.

19. The macro lens of claim 16, wherein an on-axis distance TD2 from the surface of the first lens facing the light-in side to the surface of the fifth lens facing the light-out side in the second object distance state of the macro lens is satisfied with an on-axis distance TTL2 from the surface of the first lens facing the light-in side to the image plane of the macro lens in the second object distance state: 0.6< TD2/TTL2< 1.2.

20. The macro lens according to claim 16, wherein a magnification M1 of the macro lens in the first object distance state satisfies: 0.6< M1< 1.4.

21. The macro lens of claim 16, wherein in the first object distance state, the effective focal length F1 of the macro lens, the effective focal length F3 of the third lens and the effective focal length F4 of the fourth lens satisfy: -1.5< F1/(F3+ F4) < -0.5.

22. The macro lens of claim 16, wherein a combined focal length F23 of the second and third lenses, an effective focal length F2 of the macro lens when the macro lens is in the second object state, satisfy: 0.5< F23/F2< 1.2.

23. The macro-lens of claim 16, wherein a radius of curvature R9 of a surface of the fifth lens facing the light entrance side and an effective focal length f5 of the fifth lens satisfy: 0.2< R9/f5< 1.2.

24. The macro lens of claim 16, wherein the radius of curvature R5 of the surface of the third lens facing the light incident side and the radius of curvature R3 of the surface of the second lens facing the light incident side satisfy: -1.3< R5/R3< -0.5.

25. The macro lens according to claim 16, wherein a radius of curvature R1 of a surface of the first lens facing the light incident side and a radius of curvature R2 of a surface of the first lens facing the light exit side satisfy: -0.8< (R1-R2)/(R1+ R2) <0.

26. The macro lens according to claim 16, wherein a center thickness CT5 of the fifth lens on an optical axis of the macro lens and a center thickness CT2 of the second lens on the optical axis satisfy: CT5/CT2< 0.8.

27. The macro-lens of claim 16, wherein an on-axis distance SAG11 between an intersection point of the first lens light-entering-side surface and the optical axis of the macro-lens and an effective radius vertex of the first lens light-entering-side surface satisfies, with a central thickness CT1 of the first lens on the optical axis: -1.0< SAG11/CT1< 0.

28. The macro-lens of claim 16, wherein an on-axis distance SAG41 from an intersection point of a light-entering side surface of the fourth lens and an optical axis of the macro-lens to an effective radius vertex of the light-entering side surface of the fourth lens to an on-axis distance SAG42 from an intersection point of a light-exiting side surface of the fourth lens and the optical axis to an effective radius vertex of a light-exiting side surface of the fourth lens satisfies: -1.2< SAG41/SAG42 <0.

29. The macro lens of claim 16, wherein an effective half aperture DT11 of a surface of the first lens facing the light entrance side satisfies an edge thickness ET1 of the first lens: 0.2< ET1/DT11< 1.0.

30. The macro lens according to claim 16, wherein an abbe number V5 of the fifth lens and an abbe number V4 of the fourth lens satisfy: 0.4< V5/V4< 1.2.