CN111897104A

CN111897104A - Optical imaging lens

Info

Publication number: CN111897104A
Application number: CN202010980192.2A
Authority: CN
Inventors: 计云兵; 陈程; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2020-11-06
Anticipated expiration: 2040-09-17
Also published as: CN111897104B

Abstract

The application discloses an optical imaging lens, this optical imaging lens includes along the optical axis from the object side to the image side in proper order: a first lens having an optical power; a second lens having a refractive power, an object side surface of which is concave; a third lens having a refractive power, an object side surface of which is concave; a fourth lens having an optical power; and a fifth lens having a refractive power, an image-side surface of which is convex. Wherein, the focal power of the second lens and the focal power of the fourth lens are both negative or both positive; and the curvature radius R3 of the object side surface of the second lens and the total effective focal length f of the optical imaging lens meet the following conditions: r3/f is more than-1.5 and less than-1, so that the optical imaging lens has the characteristics of long focal length, light weight and the like.

Description

Optical imaging lens

Technical Field

The present application relates to the field of optical elements, and in particular, to an optical imaging lens including five lenses.

Background

Along with the continuous development of scientific technology, the camera module plays an increasingly important role in the work and life of people, such as camera modules of mobile phones, computers and telephone watches related to the entertainment field or the life field, and camera modules used in the safety field or the production field, for vehicle-mounted, security and monitoring, and the like. The long-focus camera module occupies a place among a plurality of camera modules because of the long-distance camera function.

Compare in the long burnt module of making a video recording, ordinary short burnt module of making a video recording can realize clear formation of image when closely taking the scenery, nevertheless can't form images clearly the scenery on the detector when long-distance shooting. The method of enlarging the image to make the shot scenery see more clearly can make the image appear more noise and smear. On the contrary, the long-focus camera module can realize long-distance clear shooting with natural advantages, and still can keep the imaging picture clear by amplifying the imaging picture by one time. Therefore, in order to realize a clearer imaging picture at the time of long-distance shooting, a telephoto imaging module having a longer focal length must be used.

Disclosure of Invention

The present application provides an optical imaging lens applicable to portable electronic products, for example, an optical imaging lens with ultra-long focus and light weight, which can at least solve or partially solve at least one of the above-mentioned disadvantages in the prior art.

An aspect of the present application provides an optical imaging lens, which may include, in order from an object side to an image side along an optical axis: a first lens having an optical power; a second lens having a refractive power, an object side surface of which is concave; a third lens having a refractive power, an object side surface of which is concave; a fourth lens having an optical power; and a fifth lens with a focal power, an image side surface of which is convex; wherein, the focal power of the second lens and the focal power of the fourth lens are both negative or both positive; and the curvature radius R3 of the object side surface of the second lens and the total effective focal length f of the optical imaging lens can satisfy the following conditions: -1.5 < R3/f < -1.

In one embodiment, no filter element may be disposed between the fifth lens and the imaging surface of the optical imaging lens.

In one embodiment, at least one of an object-side surface and an image-side surface of at least one of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens may be provided with an infrared cut film.

In one embodiment, the effective focal length f2 of the second lens and the effective focal length f4 of the fourth lens may satisfy: f2/f4 is more than 0.5 and less than 2.

In one embodiment, the distance TTL between the object side surface of the first lens element and the imaging surface on the optical axis and the total effective focal length f of the optical imaging lens can satisfy: TTL/f is less than 1.

In one embodiment, the half of the diagonal length ImgH of the effective pixel area on the imaging plane and the total effective focal length f of the optical imaging lens can satisfy: ImgH/f is less than 0.5.

In one embodiment, the effective focal length f1 of the first lens and the radius of curvature R1 of the object side of the first lens may satisfy: r1/f1 is more than 0.3 and less than 0.7.

In one embodiment, the radius of curvature R10 of the image-side surface of the fifth lens and the total effective focal length f of the optical imaging lens satisfy: -2 < R10/f < -1.

In one embodiment, the on-axis distance SAG31 from the intersection of the object-side surface of the third lens and the optical axis to the effective radius vertex of the object-side surface of the third lens and the central thickness CT3 of the third lens on the optical axis may satisfy: -0.5 < SAG31/CT3 < 0.

In one embodiment, the central thickness CT3 of the third lens on the optical axis and the air interval T34 of the third lens and the fourth lens on the optical axis may satisfy: 0.2 < CT3/T34 < 0.7.

In one embodiment, the on-axis distance SAG21 from the intersection of the object-side surface of the second lens and the optical axis to the effective radius vertex of the object-side surface of the second lens and the central thickness CT2 of the second lens on the optical axis may satisfy: i10 XSAG 21/CT 2I < 1.0.

In one embodiment, the maximum effective half aperture DT11 of the object-side surface of the first lens and the maximum effective half aperture DT42 of the image-side surface of the fourth lens satisfy: DT11/DT42 of more than 0.5 and less than or equal to 1.

In one embodiment, a vertical distance YC42 from an inflection point of an image-side surface of the fourth lens to an optical axis and a maximum effective radius DT42 of the image-side surface of the fourth lens may satisfy: YC42/DT42 < 1 is more than 0.2.

In one embodiment, the central thickness CT4 of the fourth lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis may satisfy: 0.5 < CT4/CT5 < 1.

In one embodiment, the image-side surface of the fourth lens may have at least one inflection point, and at least one convex portion may be provided from a center of the image-side surface of the fourth lens to an edge of the image-side surface of the fourth lens.

Another aspect of the present application provides an optical imaging lens, which may include, in order from an object side to an image side along an optical axis: a first lens having an optical power; a second lens having a refractive power, an object side surface of which is concave; a third lens having a refractive power, an object side surface of which is concave; a fourth lens having an optical power; and a fifth lens with a focal power, an image side surface of which is convex; wherein, the focal power of the second lens and the focal power of the fourth lens are both negative or both positive; the central thickness CT4 of the fourth lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis can satisfy: 0.5 < CT4/CT5 < 1; and the curvature radius R10 of the image side surface of the fifth lens and the total effective focal length f of the optical imaging lens can satisfy the following conditions: -2 < R10/f < -1.

In one embodiment, the half of the diagonal length ImgH of the effective pixel area on the imaging plane of the optical lens and the total effective focal length f of the optical imaging lens may satisfy: ImgH/f is less than 0.5.

In one embodiment, the radius of curvature R3 of the object-side surface of the second lens and the total effective focal length f of the optical imaging lens satisfy: -1.5 < R3/f < -1.

The optical imaging lens provided by the application adopts a plurality of lenses, such as the first lens to the fifth lens, the optical focal power of each lens in the optical imaging system and the correlation among the total optical length, the total effective focal length and half of the diagonal length of the effective pixel area on the imaging surface are reasonably controlled, and an infrared ray cut-off film is arranged on at least one surface of the object side surface and the image side surface of at least one lens in the first lens to the fifth lens, so that the optical imaging lens with long focal length, high image quality, light weight and low cost can be realized.

Drawings

Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:

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

fig. 2A to 2D show an astigmatism curve, a distortion curve, a chromatic aberration of magnification curve, and a relative illuminance curve, respectively, of the optical imaging lens of embodiment 1;

fig. 3 is a schematic structural view showing an optical imaging lens according to embodiment 2 of the present application;

fig. 4A to 4D show an astigmatism curve, a distortion curve, a chromatic aberration of magnification curve, and a relative illuminance curve, respectively, of the optical imaging lens of embodiment 2;

fig. 5 is a schematic structural view showing an optical imaging lens according to embodiment 3 of the present application;

fig. 6A to 6D show an astigmatism curve, a distortion curve, a chromatic aberration of magnification curve, and a relative illuminance curve, respectively, of the optical imaging lens of embodiment 3;

fig. 7 is a schematic structural view showing an optical imaging lens according to embodiment 4 of the present application;

fig. 8A to 8D show an astigmatism curve, a distortion curve, a chromatic aberration of magnification curve, and a relative illuminance curve, respectively, of the optical imaging lens of embodiment 4;

fig. 9 is a schematic structural view showing an optical imaging lens according to embodiment 5 of the present application; and

fig. 10A to 10D show an astigmatism curve, a distortion curve, a chromatic aberration of magnification curve, and a relative illuminance curve, respectively, of the optical imaging lens of embodiment 5.

Detailed Description

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

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

In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.

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

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

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

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

An optical imaging lens according to an exemplary embodiment of the present application may include five lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The five lenses are arranged in sequence from the object side to the image side along the optical axis. In the first to fifth lenses, each of adjacent two lenses may have an air space therebetween.

In an exemplary embodiment, the first lens has a positive or negative power; the second lens has positive focal power or negative focal power, and the object side surface of the second lens is a concave surface; the third lens has positive focal power or negative focal power, and the object side surface of the third lens is a concave surface; the fourth lens has positive focal power or negative focal power; and the fifth lens has positive focal power or negative focal power, and the image side surface of the fifth lens is a convex surface. And the focal power of the second lens and the focal power of the fourth lens are both negative or both positive.

In an exemplary embodiment, the object side surface of the first lens may be convex.

In an exemplary embodiment, the object side surface of the second lens may be concave.

In an exemplary embodiment, the object side surface of the third lens may be concave.

In an exemplary embodiment, the image side surface of the fourth lens may be concave.

In an exemplary embodiment, an image side surface of the fifth lens may be convex.

In an exemplary embodiment, the radius of curvature R3 of the object side surface of the second lens and the total effective focal length f of the optical imaging lens may satisfy: -1.5 < R3/f < -1. For example, -1.3 < R3/f < -1.1. The ratio of the curvature radius of the object side surface of the second lens to the total effective focal length of the optical imaging lens is controlled within a reasonable numerical range, so that light rays entering the optical imaging lens can be prevented from being excessively bent, and the optical imaging lens can better balance aberration.

In an exemplary embodiment, at least one of an object-side surface and an image-side surface of at least one of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens may be provided with an infrared ray cut film. The color filter arranged in the existing optical imaging lens can be replaced by plating the infrared ray cut-off film on at least one surface of the object side surface and the image side surface of the first lens to the fifth lens, so that the manufacturing cost of the optical imaging lens is effectively reduced, and the light weight of the optical imaging lens is realized.

In an exemplary embodiment, the effective focal length f2 of the second lens and the effective focal length f4 of the fourth lens may satisfy: f2/f4 is more than 0.5 and less than 2. The ratio of the effective focal length of the second lens to the effective focal length of the fourth lens is controlled within a reasonable numerical range, so that the focal power of the second lens and the focal power of the fourth lens are prevented from being too large, the sensitivity of the second lens and the sensitivity of the fourth lens to the optical imaging lens are reduced, and the optical imaging lens is favorably balanced in aberration better.

In an exemplary embodiment, a distance TTL on an optical axis from an object side surface of the first lens to an imaging surface of the optical lens and a total effective focal length f of the optical imaging lens may satisfy: TTL/f is less than 1. For example 0.9 < TTL/f < 1. The mutual relation between the total optical length and the total effective focal length of the optical imaging lens is reasonably controlled, and the total optical length of the optical imaging lens can be controlled within a certain range on the premise of ensuring that the optical imaging lens has a long focal length; the optical imaging lens has the advantages that the compactness of the optical imaging lens is improved, meanwhile, the excessive increase of the aberration of the optical imaging lens is prevented, and the improvement of the imaging quality of the optical imaging lens is facilitated.

In an exemplary embodiment, the half ImgH of the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens and the total effective focal length f of the optical imaging lens may satisfy: ImgH/f is less than 0.5. For example, 0.3 < ImgH/f < 0.5. The ratio of half of the diagonal length of the effective pixel area on the imaging surface to the total effective focal length is controlled within a reasonable numerical range, so that the aberration of an optical imaging system is reduced, and the imaging quality of the optical imaging lens is ensured.

In an exemplary embodiment, the effective focal length f1 of the first lens and the radius of curvature R1 of the object side of the first lens may satisfy: r1/f1 is more than 0.3 and less than 0.7. For example, 0.4 < R1/f1 < 0.6. The mutual relation between the effective focal length of the first lens and the curvature radius of the object side surface of the first lens is reasonably controlled, so that light rays entering the optical imaging lens can be prevented from being excessively bent, and the optical imaging lens is favorable for balancing aberration better.

In an exemplary embodiment, the radius of curvature R10 of the image-side surface of the fifth lens and the total effective focal length f of the optical imaging lens may satisfy: -2 < R10/f < -1. For example, -1.4 < R10/f < -1. The ratio of the curvature radius of the image side surface of the fifth lens to the total effective focal length of the optical imaging lens is controlled within a reasonable numerical range, so that light rays entering the optical imaging lens can be prevented from being excessively bent, and the optical imaging lens can better balance aberration.

In an exemplary embodiment, an on-axis distance SAG31 from an intersection of an object-side surface of the third lens and the optical axis to an effective radius vertex of the object-side surface of the third lens and a center thickness CT3 of the third lens on the optical axis may satisfy: -0.5 < SAG31/CT3 < 0. The interrelation between the rise of the object side surface of the third lens and the central thickness CT3 of the third lens on the optical axis is reasonably controlled, the third lens can be prevented from being bent too much, the processing difficulty of the third lens is reduced, and meanwhile, the optical imaging lens has better capability of balancing chromatic aberration and distortion.

In an exemplary embodiment, the central thickness CT3 of the third lens on the optical axis and the air interval T34 of the third lens and the fourth lens on the optical axis may satisfy: 0.2 < CT3/T34 < 0.7. Through controlling the central thickness of the third lens on the optical axis and the ratio of the third lens to the air space of the fourth lens on the optical axis within a reasonable numerical range, the size of the optical imaging lens can be effectively reduced, the overlarge volume of the optical imaging lens is avoided, the assembly difficulty of the third lens is reduced, and the high space utilization rate of the optical imaging system is realized.

In an exemplary embodiment, an on-axis distance SAG21 from an intersection of an object-side surface of the second lens and the optical axis to an effective radius vertex of the object-side surface of the second lens and a center thickness CT2 of the second lens on the optical axis may satisfy: i10 XSAG 21/CT 2I < 1.0. For example, 0.4 < |10 × SAG21/CT2| < 1.0. The interrelation between the rise of the object side surface of the second lens and the central thickness of the second lens on the optical axis is reasonably controlled, the second lens can be prevented from being excessively bent, the processing difficulty of the second lens is reduced, and meanwhile, the optical imaging lens has better capability of balancing chromatic aberration and distortion.

In an exemplary embodiment, the maximum effective half aperture DT11 of the object side surface of the first lens and the maximum effective half aperture DT42 of the image side surface of the fourth lens may satisfy: DT11/DT42 of more than 0.5 and less than or equal to 1. The ratio of the maximum effective semi-aperture of the object side surface of one lens to the maximum effective semi-aperture of the image side surface of the fourth lens is controlled within a reasonable numerical range, so that smooth convergence of light rays entering an optical imaging system can be guaranteed, the light rays entering the optical imaging system are effectively prevented from being excessively bent, and the optical imaging lens is guaranteed to have high imaging quality.

In an exemplary embodiment, a vertical distance YC42 from an inflection point of an image-side surface of the fourth lens to the optical axis and a maximum effective radius DT42 of the image-side surface of the fourth lens may satisfy: YC42/DT42 < 1 is more than 0.2. The maximum effective radius of the image side surface of the fourth lens and the vertical distance between the inflection point and the optical axis are reasonably controlled, the field curvature of the optical imaging system can be effectively controlled, and the off-axis chromatic aberration of the optical imaging lens is balanced to obtain higher imaging quality.

In an exemplary embodiment, the central thickness CT4 of the fourth lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis may satisfy: 0.5 < CT4/CT5 < 1. For example, 0.7 < CT4/CT5 < 1. The ratio of the central thickness of the fourth lens and the central thickness of the fifth lens on the optical axis is controlled within a reasonable numerical range, so that the size of the optical imaging lens can be effectively reduced, the optical imaging lens is prevented from being too large in size, the assembly difficulty of the fourth lens and the fifth lens is reduced, and the space utilization rate of the optical imaging system is improved.

In an exemplary embodiment, the optical imaging lens may further include a diaphragm. The diaphragm may be disposed at an appropriate position as required. For example, a diaphragm may be disposed between the object side and the first lens. Optionally, the optical imaging lens may further include a protective glass for protecting the photosensitive element on the imaging surface.

The application provides an optical imaging lens with characteristics of ultra-long focus, ultra-light weight and the like. The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, five lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, the incident light can be effectively converged, the optical total length of the imaging lens is reduced, the machinability of the imaging lens is improved, and the optical imaging lens is more favorable for production and processing. In addition, the optical imaging lens according to the present application does not use a filter, thereby ensuring lightweight and low cost of the imaging system.

In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspheric mirror surface, i.e., at least one of the object side surface of the first lens to the image side surface of the fifth lens is an aspheric mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens is an aspheric mirror surface. Optionally, each of the first, second, third, fourth, and fifth lenses has an object-side surface and an image-side surface that are aspheric mirror surfaces.

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

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

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

Example 1

An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 is a schematic view showing a structure of an optical imaging lens according to embodiment 1 of the present application.

As shown in fig. 1, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and an image plane S11.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The light from the object sequentially passes through the respective surfaces S1 to S10 and is finally imaged on the imaging surface S11.

Further, an infrared cut film is provided on the image side surface S2 of the first lens E1.

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

TABLE 1

In the present embodiment, the total effective focal length f of the optical imaging lens is 7.04mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S11 is 6.89mm, and the half ImgH of the diagonal length of the effective pixel area on the imaging surface S11 is 2.29 mm.

In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 to the fifth lens E5 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1 to S10 used in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

2.6136E-03

-1.1721E-02

4.3470E-02

-9.6490E-02

1.2609E-01

-9.6784E-02

4.1884E-02

-9.1267E-03

7.2276E-04

S2

-7.7885E-02

3.7423E-02

-1.4354E-02

8.0097E-03

3.6008E-02

-7.8572E-02

7.9019E-02

-3.8992E-02

6.9371E-03

S3

-2.9879E-02

8.4221E-02

-1.3759E-01

3.0839E-01

-6.0656E-01

8.3776E-01

-6.8743E-01

3.0175E-01

-5.5553E-02

S4

9.8658E-02

-1.3131E-01

1.0163E+00

-4.3405E+00

1.0567E+01

-1.5586E+01

1.3777E+01

-6.6705E+00

1.3610E+00

S5

-1.7159E-02

1.4064E-02

-2.6248E-01

5.4994E-01

-7.1992E-01

6.1574E-01

-2.4987E-01

3.6618E-02

1.2609E-04

S6

-6.8009E-02

-2.7799E-02

1.0707E-01

-6.4446E-01

1.7782E+00

-2.6282E+00

2.2598E+00

-1.0709E+00

2.1680E-01

S7

-9.0252E-02

-1.2799E-02

-4.7234E-02

1.0150E-02

8.6695E-03

-1.5702E-02

9.9476E-03

-4.8523E-03

2.4518E-03

S8

-8.7964E-02

4.4606E-02

-4.7255E-02

1.2239E-02

7.6093E-04

-1.2612E-03

-3.9370E-05

-9.6209E-05

1.4889E-04

S9

-2.0835E-01

1.4971E-01

-1.0227E-01

5.5058E-02

-2.1183E-02

2.7261E-03

-1.5498E-04

2.6089E-04

1.1538E-05

S10

-8.0768E-02

3.3406E-02

-1.1486E-02

2.5005E-03

-9.4515E-05

-5.6654E-05

-5.0923E-07

-1.8307E-06

1.0745E-06

TABLE 2

Fig. 2A shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 1. Fig. 2B shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2C shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 1, which represents a deviation of different image heights on the imaging plane after light passes through the lens. Fig. 2D shows a relative illuminance curve of the optical imaging lens of embodiment 1, which represents relative illuminance values corresponding to different image heights. As can be seen from fig. 2A to 2D, the optical imaging lens according to embodiment 1 can achieve good imaging quality.

Example 2

An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. Fig. 3 shows a schematic structural diagram of an optical imaging lens according to embodiment 2 of the present application.

As shown in fig. 3, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and an image plane S11.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The light from the object sequentially passes through the respective surfaces S1 to S10 and is finally imaged on the imaging surface S11.

In the present embodiment, the total effective focal length f of the optical imaging lens is 7.03mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S11 is 6.62mm, and the half ImgH of the diagonal length of the effective pixel area on the imaging surface S11 is 2.29 mm.

Table 3 shows a basic parameter table of the optical imaging lens of embodiment 2, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).

TABLE 3

In embodiment 2, both the object-side surface and the image-side surface of any one of the first lens E1 through the fifth lens E5 are aspheric. Table 4 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1-S10 used in example 2₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

TABLE 4

Fig. 4A shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 2. Fig. 4B shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4C shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents a deviation of different image heights on the imaging plane after light passes through the lens. Fig. 4D shows a relative illuminance curve of the optical imaging lens of embodiment 2, which represents relative illuminance values corresponding to different image heights. As can be seen from fig. 4A to 4D, the optical imaging lens according to embodiment 2 can achieve good imaging quality.

Example 3

An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic structural diagram of an optical imaging lens according to embodiment 3 of the present application.

As shown in fig. 5, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and an image plane S11.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The light from the object sequentially passes through the respective surfaces S1 to S10 and is finally imaged on the imaging surface S11.

In the present embodiment, the total effective focal length f of the optical imaging lens is 7.04mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S11 is 6.45mm, and the half ImgH of the diagonal length of the effective pixel area on the imaging surface S11 is 2.29 mm.

Table 5 shows a basic parameter table of the optical imaging lens of embodiment 3, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).

TABLE 5

In embodiment 3, both the object-side surface and the image-side surface of any one of the first lens E1 to the fifth lens E5 are aspheric. Table 6 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1-S10 used in example 3₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

7.1312E-03

-9.0763E-03

4.4302E-02

-9.6581E-02

1.2608E-01

-9.6684E-02

4.1977E-02

-9.1045E-03

6.8294E-04

S2

5.5369E-03

1.7166E-02

-1.7549E-02

6.3401E-03

3.5024E-02

-7.8895E-02

7.9025E-02

-3.8818E-02

7.2910E-03

S3

-3.0640E-02

1.0715E-01

-1.4009E-01

3.0600E-01

-6.0849E-01

8.3616E-01

-6.8809E-01

3.0205E-01

-5.4748E-02

S4

-3.9779E-02

1.8676E-01

-6.2835E-01

2.6893E+00

-7.3866E+00

1.2588E+01

-1.2712E+01

6.9714E+00

-1.5939E+00

S5

-1.4497E-01

1.4123E-01

-1.4454E-01

5.0578E-01

-8.0218E-01

6.0684E-01

-1.8038E-01

1.1240E-11

-2.8499E-12

S6

-1.0401E-01

9.0760E-02

1.4878E-01

-6.7559E-01

1.7426E+00

-2.6319E+00

2.2857E+00

-1.0532E+00

1.9893E-01

S7

-1.3360E-01

5.6693E-02

-3.8512E-02

1.9463E-02

1.0837E-02

-1.8688E-02

9.3919E-03

-2.1974E-03

2.0864E-04

S8

-5.4431E-02

4.7552E-02

-3.5187E-02

1.1809E-02

-2.0449E-04

-1.0467E-03

3.1143E-04

-3.7764E-05

1.6591E-06

S9

-1.2973E-01

1.5938E-01

-1.2140E-01

5.7925E-02

-1.7708E-02

3.4531E-03

-4.2024E-04

2.8931E-05

-8.2319E-07

S10

-7.3044E-02

4.2154E-02

-1.2432E-02

2.0406E-03

-1.3743E-04

-3.5627E-05

8.6466E-06

-6.2634E-07

3.8017E-08

TABLE 6

Fig. 6A shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 3. Fig. 6B shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6C shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 3, which represents a deviation of different image heights on the imaging plane after light passes through the lens. Fig. 6D shows a relative illuminance curve of the optical imaging lens of embodiment 3, which represents relative illuminance values corresponding to different image heights. As can be seen from fig. 6A to 6D, the optical imaging lens according to embodiment 3 can achieve good imaging quality.

Example 4

An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic structural diagram of an optical imaging lens according to embodiment 4 of the present application.

As shown in fig. 7, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and an image plane S11.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The light from the object sequentially passes through the respective surfaces S1 to S10 and is finally imaged on the imaging surface S11.

Further, an infrared cut film is provided on the image side surface S6 of the third lens E3.

In the present embodiment, the total effective focal length f of the optical imaging lens is 7.04mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S11 is 6.60mm, and the half ImgH of the diagonal length of the effective pixel area on the imaging surface S11 is 2.29 mm.

Table 7 shows a basic parameter table of the optical imaging lens of embodiment 4, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).

TABLE 7

In embodiment 4, both the object-side surface and the image-side surface of any one of the first lens E1 to the fifth lens E5 are aspheric. Table 8 below gives the higher order polynomials that can be used for each of the aspherical mirror surfaces S1-S10 in example 4Number A₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

8.5655E-03

-8.5198E-03

4.4684E-02

-9.6410E-02

1.2612E-01

-9.6684E-02

4.1967E-02

-9.1113E-03

6.8071E-04

S2

-2.6774E-03

1.8221E-02

-1.6035E-02

7.3275E-03

3.5469E-02

-7.8760E-02

7.9014E-02

-3.8901E-02

7.1584E-03

S3

-3.1984E-02

1.0659E-01

-1.3880E-01

3.0784E-01

-6.0695E-01

8.3705E-01

-6.8779E-01

3.0201E-01

-5.4873E-02

S4

-2.5967E-02

1.5171E-01

-4.4751E-01

1.8245E+00

-4.7716E+00

7.6176E+00

-7.0323E+00

3.4339E+00

-6.7027E-01

S5

-1.2813E-01

1.3975E-01

-1.7968E-01

4.9632E-01

-7.7786E-01

6.3229E-01

-2.0020E-01

-4.5019E-12

-7.5315E-12

S6

-8.0823E-02

6.7933E-02

1.3157E-01

-6.7712E-01

1.7484E+00

-2.6277E+00

2.2835E+00

-1.0520E+00

1.9893E-01

S7

-1.1150E-01

1.8888E-02

-4.6513E-02

1.8802E-02

1.1630E-02

-1.8223E-02

9.4328E-03

-2.2724E-03

2.4134E-04

S8

-5.2897E-02

3.7147E-02

-3.4072E-02

1.2118E-02

-2.0005E-04

-1.0557E-03

3.0948E-04

-3.7823E-05

1.8139E-06

S9

-1.1494E-01

1.6446E-01

-1.2182E-01

5.7772E-02

-1.7715E-02

3.4591E-03

-4.1790E-04

2.9238E-05

-1.0002E-06

S10

-6.5708E-02

3.7859E-02

-1.1639E-02

2.1972E-03

-1.2959E-04

-3.8642E-05

7.7008E-06

-7.6080E-07

5.9338E-08

TABLE 8

Fig. 8A shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 8B shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8C shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents a deviation of different image heights on the imaging plane after light passes through the lens. Fig. 8D shows a relative illuminance curve of the optical imaging lens of embodiment 4, which represents relative illuminance values corresponding to different image heights. As can be seen from fig. 8A to 8D, the optical imaging lens according to embodiment 4 can achieve good imaging quality.

Example 5

An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic structural diagram of an optical imaging lens according to embodiment 5 of the present application.

As shown in fig. 9, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and an image plane S11.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The light from the object sequentially passes through the respective surfaces S1 to S10 and is finally imaged on the imaging surface S11.

In the present embodiment, the total effective focal length f of the optical imaging lens is 7.02mm, the distance TTL on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S11 is 6.63mm, and the half ImgH of the diagonal length of the effective pixel area on the imaging surface S11 is 2.29 mm.

Table 9 shows a basic parameter table of the optical imaging lens of embodiment 5, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).

TABLE 9

In embodiment 5, both the object-side surface and the image-side surface of any one of the first lens E1 to the fifth lens E5 are aspheric. Table 10 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1-S10 used in example 5₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

7.5875E-03

-8.9255E-03

4.4391E-02

-9.6455E-02

1.2614E-01

-9.6672E-02

4.1971E-02

-9.1093E-03

6.8361E-04

S2

-1.9200E-03

1.7958E-02

-1.5220E-02

8.0851E-03

3.5795E-02

-7.8713E-02

7.8957E-02

-3.8973E-02

7.0950E-03

S3

-2.8965E-02

1.0700E-01

-1.3998E-01

3.0719E-01

-6.0693E-01

8.3728E-01

-6.8768E-01

3.0193E-01

-5.5090E-02

S4

-2.1999E-02

1.4930E-01

-4.5353E-01

1.8173E+00

-4.7407E+00

7.6073E+00

-7.1440E+00

3.6031E+00

-7.4674E-01

S5

-1.4592E-01

1.1691E-01

-1.7500E-01

5.0597E-01

-7.8243E-01

6.1956E-01

-1.9153E-01

1.5937E-12

-5.5315E-12

S6

-7.7523E-02

4.6646E-02

1.3273E-01

-6.6474E-01

1.7521E+00

-2.6346E+00

2.2760E+00

-1.0476E+00

1.9996E-01

S7

-1.3636E-01

3.2897E-02

-4.3060E-02

1.9766E-02

1.2110E-02

-1.8012E-02

9.4852E-03

-2.2974E-03

1.9869E-04

S8

-5.4670E-02

3.9170E-02

-3.2463E-02

1.1961E-02

-2.9517E-04

-1.0677E-03

3.1219E-04

-3.6348E-05

2.0783E-06

S9

-9.7046E-02

1.6098E-01

-1.2187E-01

5.7860E-02

-1.7710E-02

3.4549E-03

-4.1904E-04

2.9214E-05

-8.8751E-07

S10

-5.2961E-02

3.5893E-02

-1.1073E-02

2.1863E-03

-1.4514E-04

-4.1439E-05

7.5088E-06

-7.0169E-07

8.1220E-08

Watch 10

Fig. 10A shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 5. Fig. 10B shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10C shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 5, which represents a deviation of different image heights on the imaging surface after light passes through the lens. Fig. 10D shows a relative illuminance curve of the optical imaging lens of embodiment 5, which represents relative illuminance values corresponding to different image heights. As can be seen from fig. 10A to 10D, the optical imaging lens according to embodiment 5 can achieve good imaging quality.

In summary, examples 1 to 5 satisfy the relationships shown in table 11, respectively.

Conditions/examples	1	2	3	4	5
						R3/f	-1.23	-1.23	-1.36	-1.13	-1.16
f2/f4	1.00	0.83	1.76	0.63	0.76
						TTL/f	0.98	0.94	0.92	0.94	0.94
ImgH/f	0.33	0.33	0.33	0.33	0.33
						R1/f1	0.52	0.55	0.55	0.56	0.56
R10/f	-1.14	-1.14	-1.28	-1.14	-1.14
						SAG31/CT3	-0.32	-0.29	-0.14	-0.27	-0.18
CT3/T34	0.54	0.43	0.39	0.32	0.49
						\|10×SAG21/CT2\|	0.80	0.52	0.67	0.84	0.70
DT11/DT42	1.00	0.73	0.68	0.75	0.75
						CT4/CT5	0.87	0.88	0.99	0.88	0.88
YC42/DT42	0.35	0.56	0.74	0.53	0.99

TABLE 11

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

Claims

1. An optical imaging lens, characterized in that, from the object side to the image side along the optical axis, comprising:

a first lens having optical power;

a second lens having optical power, and its object side surface is concave;

a third lens having optical power, and its object side is concave;

a fourth lens having optical power; and

a fifth lens having optical power, and its image side is convex;

wherein, the refractive power of the second lens and the refractive power of the fourth lens are both negative, or both are positive; and

The curvature radius R3 of the object side surface of the second lens and the total effective focal length f of the optical imaging lens satisfy:

-1.5<R3/f<-1.

2 . The optical imaging lens according to claim 1 , wherein no filter element is provided between the fifth lens and the imaging surface of the optical imaging lens. 3 .

3. The optical imaging lens of claim 2, wherein at least one of the first lens, the second lens, the third lens, the fourth lens and the fifth lens At least one of the object side and the image side of the lens is provided with an infrared cut-off film.

4. The optical imaging lens according to claim 1, wherein the effective focal length f2 of the second lens and the effective focal length f4 of the fourth lens satisfy:

0.5<f2/f4<2.

5 . The optical imaging lens according to claim 1 , wherein the distance TTL from the object side of the first lens to the imaging surface on the optical axis is the total effective focal length f of the optical imaging lens. 6 . Satisfy:

TTL/f<1.

6. The optical imaging lens according to claim 1, wherein the half ImgH of the diagonal length of the effective pixel area on the imaging surface and the total effective focal length f of the optical imaging lens satisfy:

ImgH/f<0.5.

7. The optical imaging lens according to claim 1, wherein the effective focal length f1 of the first lens and the curvature radius R1 of the object side surface of the first lens satisfy:

0.3<R1/f1<0.7.

8. The optical imaging lens according to claim 1, wherein the curvature radius R10 of the image side surface of the fifth lens and the total effective focal length f of the optical imaging lens satisfy:

-2<R10/f<-1.

9 . The optical imaging lens according to claim 1 , wherein the on-axis distance SAG31 from the intersection of the object side surface of the third lens and the optical axis to the vertex of the effective radius of the object side surface of the third lens is SAG31 . And the center thickness CT3 of the third lens on the optical axis satisfies:

-0.5<SAG31/CT3<0.

10. An optical imaging lens, characterized in that, along the optical axis from the object side to the image side sequentially comprising:

a first lens having optical power;

a second lens having optical power, and its object side surface is concave;

a third lens having optical power, and its object side is concave;

a fourth lens having optical power; and

a fifth lens having optical power, and its image side is convex;

Wherein, the refractive power of the second lens and the refractive power of the fourth lens are both negative, or both are positive;

0.5 < CT4/CT5 < 1; and

-2<R10/f<-1,

Wherein, CT4 is the central thickness of the fourth lens on the optical axis;

CT5 is the central thickness of the fifth lens on the optical axis;

R10 is the radius of curvature of the image side of the fifth lens; and

f is the total effective focal length of the optical imaging lens.