CN110609375A - Optical imaging lens - Google Patents

Abstract

The application discloses an optical imaging lens, which sequentially comprises a first lens with positive focal power from an object side to an image side along an optical axis; a second lens having a negative optical power; a third lens having optical power; a fourth lens with focal power, wherein the image side surface of the fourth lens is convex; and a fifth lens having a negative refractive power, an object-side surface of which is concave; wherein the total effective focal length f of the optical imaging lens satisfies: 12mm < f <20 mm.

Description

Optical imaging lens

Technical Field

The present disclosure relates to an optical imaging lens, and more particularly, to an optical imaging lens including five lenses.

Background

Along with the development of science and technology, electronic products with a camera shooting function are rapidly developed and are more and more applied to multi-scene camera shooting in different environments, wherein electronic products capable of being applied to remote high-definition camera shooting are favored by the market. For the image capturing function of electronic products, the optical imaging lens is the key to determine the image capturing effect of electronic products. The long-focus lens is very suitable for long-range shooting due to the characteristics of small depth of field, easy realization of background blurring and the like. Therefore, in order to achieve a good photographing effect when an electronic product performs long-distance photographing, an optical imaging lens in a photographing apparatus may be required to have a telephoto characteristic. However, the long focal length lens is usually very susceptible to the ambient temperature due to the long focal length, and the imaging quality is easily degraded due to the temperature change.

Disclosure of Invention

An aspect of the present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having optical power; a fourth lens with focal power, wherein the image side surface of the fourth lens is convex; and a fifth lens having a negative refractive power, an object side surface of which is concave.

In one embodiment, the total effective focal length f of the optical imaging lens satisfies: 12mm < f <20 mm.

In one 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 satisfy: ImgH/f < 0.3.

In one embodiment, the radius of curvature R1 of the object-side surface of the first lens, the radius of curvature R5 of the object-side surface of the third lens, the effective focal length f1 of the first lens, and the effective focal length f3 of the third lens satisfy: 0.2< (R1+ R5)/(f1+ f3) < 0.7.

In one embodiment, the effective focal length f2 of the second lens and the effective focal length f5 of the fifth lens satisfy: 0.2< f2/f5< 1.4.

In one embodiment, the maximum field angle FOV of the optical imaging lens satisfies: FOV < 25.

In one embodiment, the distance TTL between the object side surface of the first lens element and the imaging surface of the optical imaging lens on the optical axis and the total effective focal length f of the optical imaging lens satisfy: TTL/f < 1.1.

In one embodiment, the radius of curvature R4 of the image-side surface of the second lens, the radius of curvature R8 of the image-side surface of the fourth lens, and the radius of curvature R9 of the object-side surface of the fifth lens satisfy: -0.6< R4/(R8+ R9) < -0.1.

In one embodiment, the central thickness CT1 of the first lens on the optical axis and the distance TTL of the first lens from the object side surface to the imaging surface of the optical imaging lens on the optical axis satisfy: 1.8< CT1/TTL × 10< 2.3.

In one embodiment, the combined focal length f123 of the first lens, the second lens, and the third lens and the combined focal length f45 of the fourth lens and the fifth lens satisfy: -0.8< f123/f45< -0.3.

In one embodiment, a distance T34 between the third lens and the fourth lens on the optical axis and a distance BFL between the image side surface of the fifth lens and the imaging surface of the optical imaging lens on the optical axis satisfy: 0.2< T34/BFL < 0.6.

In one embodiment, an on-axis distance SAG31 from an intersection point 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 an on-axis distance SAG11 from an intersection point of an object-side surface of the first lens and the optical axis to an effective radius vertex of the object-side surface of the first lens satisfy: 0.5< SAG31/SAG11< 1.3.

In one embodiment, an on-axis distance SAG51 from an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of an object-side surface of the fifth lens, an on-axis distance SAG52 from an intersection point of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of an image-side surface of the fifth lens, an on-axis distance SAG41 from an intersection point of an object-side surface of the fourth lens and the optical axis to an effective radius vertex of an image-side surface of the fourth lens and an on-axis distance SAG42 from an intersection point of an image-side surface of the fourth lens and the optical axis to an effective radius vertex of an image-side surface of the fourth lens satisfy: 0.2< (SAG51+ SAG52)/(SAG41+ SAG42) < 0.9.

In one embodiment, at least one of the first to fifth lenses is a glass lens.

In one embodiment, the object-side surface and the image-side surface of at least one of the first lens element to the fifth lens element are spherical surfaces.

The optical imaging lens provided by the application adopts a plurality of lens arrangements, including a first lens to a fifth lens. The total effective focal length of the optical imaging lens is reasonably set, and the focal power and the surface type of each lens are optimally set, so that the optical imaging lens has a long-focus characteristic and good imaging quality.

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 on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification 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 on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification 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 on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification 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 on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification 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;

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

fig. 11 is a schematic structural view showing an optical imaging lens according to embodiment 6 of the present application;

fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 6;

fig. 13 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application;

fig. 14A to 14D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of an optical imaging lens of embodiment 7;

fig. 15 is a schematic structural view showing an optical imaging lens according to embodiment 8 of the present application;

fig. 16A to 16D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 8.

Detailed Description

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

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

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

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

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

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

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

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

The optical imaging lens according to an exemplary embodiment of the present application may include, for example, 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 an exemplary embodiment, the first lens may have a positive optical power; the second lens may have a negative optical power; the third lens may have a positive optical power or a negative optical power; the fourth lens can have positive focal power or negative focal power, and the image side surface of the fourth lens is a convex surface; and the fifth lens element may have a negative power, and the object-side surface thereof may be concave. The imaging quality of the optical imaging lens can be improved by reasonably configuring the focal power and the surface type of each lens.

The total effective focal length f of the optical imaging lens can satisfy the following conditions: 12mm < f <20mm, e.g., 12mm < f <16 mm. The total effective focal length of the optical imaging lens is set to be between 12mm and 20mm, so that the optical imaging lens has a long-focus characteristic, and long-distance high-definition imaging of the optical imaging system 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 <0.3, e.g. 0.1< ImgH/f < 0.3. The proportional relation between the half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens and the total effective focal length of the optical imaging lens is reasonably set, so that the optical imaging system has a compact structure and a long-focus characteristic, and is favorable for long-distance high-definition imaging of the optical imaging system.

In an exemplary embodiment, the radius of curvature R1 of the object-side surface of the first lens, the radius of curvature R5 of the object-side surface of the third lens, the effective focal length f1 of the first lens, and the effective focal length f3 of the third lens may satisfy: 0.2< (R1+ R5)/(f1+ f3) <0.7, for example, 0.3< (R1+ R5)/(f1+ f3) < 0.6. The proportional relation between the sum of the curvature radius of the object side surface of the first lens and the curvature radius of the object side surface of the third lens and the sum of the effective focal length of the first lens and the effective focal length of the third lens is reasonably set, so that the optical path deflection in an optical system can be better realized, and the high-grade spherical aberration generated by the optical system can be balanced.

In an exemplary embodiment, the effective focal length f2 of the second lens and the effective focal length f5 of the fifth lens may satisfy: 0.2< f2/f5< 1.4. The proportional relation between the effective focal length of the second lens and the effective focal length of the fifth lens is reasonably set, so that the optical sensitivity of the second lens and the optical sensitivity of the fifth lens are reduced, and batch production is easy to realize.

In an exemplary embodiment, the maximum field angle FOV of the optical imaging lens may satisfy: FOV <25 °, e.g., 20 ° < FOV <25 °. The angle of the maximum field angle of the optical imaging lens is reasonably set, and the imaging range of the optical system is favorably controlled.

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 imaging lens and a total effective focal length f of the optical imaging lens may satisfy: TTL/f <1.1, e.g., 0.8< TTL/f < 1.1. The proportional relation between the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the total effective focal length of the optical imaging lens is reasonably set, so that the optical imaging system can meet the long-focus characteristic, and the total length of the optical system is ensured within a reasonable range to realize the lightness and thinness of the lens.

In an exemplary embodiment, the radius of curvature R4 of the image-side surface of the second lens, the radius of curvature R8 of the image-side surface of the fourth lens, and the radius of curvature R9 of the object-side surface of the fifth lens may satisfy: -0.6< R4/(R8+ R9) < -0.1. The proportional relation between the curvature radius of the image side surface of the second lens and the sum of the curvature radius of the image side surface of the fourth lens and the curvature radius of the object side surface of the fifth lens is reasonably set, so that the control of the deflection angle of marginal rays of an optical system is facilitated, and the sensitivity of the optical system is reduced.

In an exemplary embodiment, the central thickness CT1 of the first lens on the optical axis and the distance TTL of the first lens from the object side surface to the imaging surface of the optical imaging lens on the optical axis may satisfy: 1.8< CT1/TTL × 10< 2.3. The proportion relation between the central thickness of the first lens on the optical axis and the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis is reasonably set, so that the optical imaging lens has good processing characteristics, and the incident light cannot be too large at the refraction angle of the first lens, and the imaging quality of an optical system is improved.

In an exemplary embodiment, a combined focal length f123 of the first lens, the second lens, and the third lens and a combined focal length f45 of the fourth lens and the fifth lens may satisfy: -0.8< f123/f45< -0.3. The proportion relation between the combined focal length of the first lens, the second lens and the third lens and the combined focal length of the fourth lens and the fifth lens is reasonably set, so that off-axis aberration of the optical system can be balanced, and the aberration correcting capability of the system can be improved.

In an exemplary embodiment, a distance T34 between the third lens and the fourth lens on the optical axis and a distance BFL between the image side surface of the fifth lens and the imaging surface of the optical imaging lens on the optical axis may satisfy: 0.2< T34/BFL < 0.6. The ratio of the distance between the third lens and the fourth lens on the optical axis to the distance between the image side surface of the fifth lens and the imaging surface of the optical imaging lens on the optical axis is set within a reasonable numerical range, so that the field curvature among the lenses in the optical system is effectively balanced, and the optical system has reasonable field curvature.

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 an on-axis distance SAG11 from an intersection of an object-side surface of the first lens and the optical axis to an effective radius vertex of the object-side surface of the first lens may satisfy: 0.5< SAG31/SAG11< 1.3. The proportional relation between the axial distance from the intersection point of the object side surface of the third lens and the optical axis to the effective radius peak of the object side surface of the third lens and the axial distance from the intersection point of the object side surface of the first lens and the optical axis to the effective radius peak of the object side surface of the first lens is reasonably set, the adjustment of the chief ray angle of the optical imaging lens is facilitated, the relative brightness of the lens group in the optical imaging lens is improved, and the image plane definition is improved.

In an exemplary embodiment, an on-axis distance SAG51 from an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens, an on-axis distance SAG52 from an intersection point of an image-side surface of the fifth lens and the optical axis to an effective radius vertex of the image-side surface of the fifth lens, an on-axis distance SAG41 from an intersection point of an object-side surface of the fourth lens and the optical axis to an effective radius vertex of the image-side surface of the fourth lens and an on-axis distance SAG42 from an intersection point of an object-side surface of the fourth lens and the optical axis to an effective radius vertex of the image-side surface of the fourth lens may satisfy: 0.2< (SAG51+ SAG52)/(SAG41+ SAG42) < 0.9. The proportion relation between the sum of the object side rise of the fifth lens and the image side rise of the fifth lens and the sum of the object side rise of the fourth lens and the image side rise of the fourth lens is reasonably set, so that the shapes and processing of the fourth lens and the fifth lens are favorably ensured to be in a better level, and spherical aberration, coma aberration and astigmatism generated by an optical system are favorably balanced.

In an exemplary embodiment, at least one of the first to fifth lenses may be a glass lens. The use of glass lenses in optical imaging lenses may have at least one of the following benefits: the glass has wider refractive index distribution, wider material selection sources, lower thermal expansion coefficient of the glass and the like. Meanwhile, because the thermal expansion coefficient of the glass is low, the glass lens applied to the optical imaging system can optimize the adverse effect caused by the environmental temperature and improve the thermal stability of the optical system. Alternatively, the third lens may be a glass lens.

In an exemplary embodiment, the object-side surface and the image-side surface of at least one of the first lens to the fifth lens are spherical surfaces. Compared with an aspheric surface profile, the spherical surface profile can effectively reduce the processing cost of the lens and the influence of the profile sensitivity, thereby improving the production yield of the lens in the optical system. Optionally, both the object-side surface and the image-side surface of the third lens are spherical.

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 stop is disposed between the object side and the first lens, near the object side of the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface.

In an exemplary embodiment, an object side surface and/or an image side surface of a partial lens in an optical imaging lens according to the present application may be 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. Alternatively, either or both of the object-side surface and the image-side surface of at least one of the first lens, the second lens, the fourth lens, and the fifth lens may be an aspherical mirror surface. Alternatively, the object-side surface and the image-side surface of each of the first lens, the second lens, the fourth lens, and the fifth lens may be aspherical mirror surfaces.

An optical imaging lens according to the present application may have a long focal length. The depth of field is small, so that background blurring is easy to realize, and the method is very suitable for long-range shooting. Meanwhile, the lens part in the lens system is made of glass and the part is made of plastic, so that the adaptability of the optical imaging lens to the ambient temperature and the thermal stability of the optical system can be enhanced.

Exemplary embodiments of the present application also provide an image pickup apparatus including the optical imaging lens described above.

Exemplary embodiments of the present application also provide an electronic apparatus including the image pickup device 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, a filter E6, and an image forming surface S13.

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

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 14.44mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging plane S13 is 12.69mm, the half ImgH of the diagonal length of the effective pixel area on the imaging plane S13 is 2.70mm, and the maximum field angle FOV of the optical imaging lens is 21.0 °.

In embodiment 1, the object-side surface and the image-side surface of the first lens E1, the second lens E2, the fourth lens E4, and the fifth lens E5 are aspheric, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric 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 coefficients A of the high-order terms which can be used for the aspherical mirror surfaces S1 to S4 and S7 to S10 in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

TABLE 2

Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 1. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different angles of view. Fig. 2D 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. 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, a filter E6, and an image forming surface S13.

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

In the present embodiment, the total effective focal length f of the optical imaging lens is 14.35mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 12.69mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 2.70mm, and the maximum field angle FOV of the optical imaging lens is 21.2 °.

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 4 shows the coefficients of high-order terms that can be used for each aspherical mirror surface in example 2.

TABLE 3

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-3.0000E-04

4.0300E-05

-8.6000E-05

4.8700E-05

-1.4000E-05

1.8600E-06

4.2200E-08

-3.9000E-08

3.1700E-09

S2

1.2444E-02

-1.4200E-03

-5.8700E-03

7.8880E-03

-4.9200E-03

1.6330E-03

-2.5000E-04

-4.2000E-07

3.2300E-06

S3

2.0096E-02

-1.2220E-02

7.0000E-05

7.0390E-03

-6.5300E-03

3.0670E-03

-8.2000E-04

1.2000E-04

-7.3000E-06

S4

3.2025E-02

-1.4210E-02

4.8620E-03

2.5410E-03

-5.1600E-03

3.7090E-03

-1.4900E-03

3.2700E-04

-3.1000E-05

S7

-1.9520E-02

-1.0670E-02

3.1920E-03

-4.9900E-03

9.3580E-03

-9.6300E-03

5.8090E-03

-1.9300E-03

2.7700E-04

S8

-6.4910E-02

8.9658E-02

-2.6721E-01

4.2568E-01

-3.9836E-01

2.2699E-01

-7.7530E-02

1.4578E-02

-1.1600E-03

S9

-1.0052E-01

1.7137E-01

-4.1283E-01

6.3337E-01

-5.8909E-01

3.3549E-01

-1.1472E-01

2.1650E-02

-1.7300E-03

S10

-4.1200E-02

3.5834E-02

-5.2470E-02

6.3270E-02

-5.1530E-02

2.6276E-02

-8.0600E-03

1.3600E-03

-9.7000E-05

TABLE 4

Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 2. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different angles of view. Fig. 4D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. 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, a filter E6, and an image forming surface S13.

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

In the present embodiment, the total effective focal length f of the optical imaging lens is 13.50mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 12.63mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 2.52mm, and the maximum field angle FOV of the optical imaging lens is 21.0 °.

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 6 shows the coefficients of high-order terms that can be used for each aspherical mirror surface in example 3.

TABLE 5

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-3.9000E-04

1.1400E-04

-2.3000E-04

2.3100E-04

-1.4000E-04

5.2200E-05

-1.2000E-05

1.4400E-06

-7.5000E-08

S2

9.3160E-03

-1.3100E-03

3.1500E-04

1.7400E-04

-1.1100E-03

1.3890E-03

-7.4000E-04

1.7600E-04

-1.5000E-05

S3

3.5780E-03

-5.2700E-03

6.5960E-03

-9.1100E-03

7.8510E-03

-3.8600E-03

1.0400E-03

-1.4000E-04

7.7500E-06

S4

2.2071E-02

-1.2350E-02

1.3345E-02

-1.8200E-02

1.7759E-02

-1.0940E-02

4.0410E-03

-8.2000E-04

7.0700E-05

S7

-3.4440E-02

1.0654E-02

-4.0400E-02

5.0931E-02

-2.7960E-02

-6.9000E-03

1.8497E-02

-9.5000E-03

1.6790E-03

S8

-1.2443E-01

3.0056E-01

-6.5961E-01

8.9679E-01

-7.7977E-01

4.3237E-01

-1.4709E-01

2.7800E-02

-2.2200E-03

S9

-1.4904E-01

4.1018E-01

-8.7566E-01

1.1810E+00

-1.0236E+00

5.6725E-01

-1.9359E-01

3.6924E-02

-3.0000E-03

S10

-3.8280E-02

4.5390E-02

-7.8070E-02

8.9695E-02

-6.7300E-02

3.2146E-02

-9.3900E-03

1.5240E-03

-1.1000E-04

TABLE 6

Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 3. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different angles of view. Fig. 6D 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. 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, a filter E6, and an image forming surface S13.

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

In the present embodiment, the total effective focal length f of the optical imaging lens is 13.30mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 12.99mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 2.70mm, and the maximum field angle FOV of the optical imaging lens is 22.9 °.

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 8 shows the coefficients of high-order terms that can be used for each aspherical mirror surface in example 4.

TABLE 7

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-7.8000E-04

5.5100E-05

-1.0000E-04

9.4000E-05

-5.7000E-05

2.2000E-05

-5.0000E-06

6.2700E-07

-3.2567E-08

S2

2.2790E-03

2.6330E-03

-8.5000E-04

-7.4000E-04

6.8400E-04

1.0600E-04

-2.6000E-04

8.5700E-05

-8.5046E-06

S3

-1.4090E-02

1.1362E-02

-3.9700E-03

-2.7000E-03

4.6020E-03

-2.6800E-03

7.6500E-04

-1.1000E-04

5.7710E-06

S4

1.3747E-02

-1.5000E-03

3.8860E-03

-9.6200E-03

1.0794E-02

-6.8600E-03

2.5010E-03

-4.9000E-04

3.9665E-05

S7

-2.8800E-02

1.6207E-02

-5.2540E-02

9.5071E-02

-1.0695E-01

7.0830E-02

-2.5080E-02

3.6540E-03

1.1650E-05

S8

-1.9296E-01

3.9520E-01

-6.5644E-01

8.4967E-01

-7.9408E-01

4.8722E-01

-1.8208E-01

3.7315E-02

-3.2053E-03

S9

-2.5242E-01

5.5200E-01

-8.9598E-01

1.1428E+00

-1.0597E+00

6.4697E-01

-2.4075E-01

4.9126E-02

-4.2010E-03

S10

-4.5760E-02

7.3470E-02

-1.0720E-01

1.2243E-01

-1.0223E-01

5.6491E-02

-1.9090E-02

3.5430E-03

-2.7585E-04

TABLE 8

Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different angles of view. Fig. 8D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. 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, a filter E6, and an image forming surface S13.

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 convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.

In the present embodiment, the total effective focal length f of the optical imaging lens is 13.13mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 12.76mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 2.68mm, and the maximum field angle FOV of the optical imaging lens is 22.9 °.

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 10 shows the high-order coefficient which can be used for each aspherical mirror surface in example 5.

TABLE 9

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.3900E-03

1.5300E-04

-5.7000E-04

5.9000E-04

-3.6194E-04

1.3600E-04

-3.1000E-05

3.8900E-06

-2.1000E-07

S2

5.4193E-02

-1.3271E-01

1.7255E-01

-1.4127E-01

7.5481E-02

-2.6290E-02

5.7570E-03

-7.2000E-04

3.9800E-05

S3

4.9914E-02

-1.2653E-01

1.6338E-01

-1.3116E-01

6.7787E-02

-2.2450E-02

4.5600E-03

-5.1000E-04

2.4300E-05

S4

3.0966E-02

-3.2260E-02

3.0205E-02

-2.0980E-02

9.2311E-03

-2.2700E-03

1.8900E-04

3.1900E-05

-5.8000E-06

S7

-1.6430E-02

-8.4000E-03

-3.0040E-02

8.2736E-02

-1.0491E-01

7.5475E-02

-3.0830E-02

6.5160E-03

-5.2000E-04

S8

5.4450E-03

-2.3295E-01

4.3709E-01

-4.7152E-01

3.1392E-01

-1.3000E-01

3.2327E-02

-4.3700E-03

2.4500E-04

S9

3.1820E-02

-3.4271E-01

6.5385E-01

-7.1413E-01

4.8539E-01

-2.0729E-01

5.3754E-02

-7.6600E-03

4.5500E-04

S10

-2.2310E-02

-3.2080E-02

6.7837E-02

-6.9530E-02

4.3263E-02

-1.6840E-02

3.9780E-03

-5.1000E-04

2.7000E-05

Watch 10

Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 5. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different angles of view. Fig. 10D 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. As can be seen from fig. 10A to 10D, the optical imaging lens according to embodiment 5 can achieve good imaging quality.

Example 6

An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 6 of the present application.

As shown in fig. 11, 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, a filter E6, and an image forming surface S13.

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

In the present embodiment, the total effective focal length f of the optical imaging lens is 13.23mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 12.89mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 2.65mm, and the maximum field angle FOV of the optical imaging lens is 22.5 °.

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

TABLE 11

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-1.7000E-04

1.9500E-04

-3.5962E-04

3.8000E-04

-2.4000E-04

9.3400E-05

-2.2000E-05

2.8100E-06

-1.5000E-07

S2

1.0976E-02

-3.8900E-03

9.0891E-03

-1.4040E-02

1.1781E-02

-5.3000E-03

1.0930E-03

-4.5000E-05

-9.2000E-06

S3

-6.5200E-03

-3.7300E-03

9.3646E-03

-1.6670E-02

1.6337E-02

-9.1700E-03

2.8490E-03

-4.5000E-04

2.7900E-05

S4

4.4983E-02

-4.3360E-02

4.3923E-02

-4.8900E-02

4.5607E-02

-3.0090E-02

1.2675E-02

-3.0300E-03

3.1100E-04

S7

-1.6570E-02

1.4297E-02

-5.7964E-02

9.7634E-02

-1.0076E-01

6.4113E-02

-2.4420E-02

5.0520E-03

-4.3000E-04

S8

-8.3430E-02

1.3747E-01

-2.9592E-01

4.1771E-01

-3.8203E-01

2.2231E-01

-7.9030E-02

1.5582E-02

-1.3000E-03

S9

-1.1371E-01

1.7595E-01

-3.3566E-01

4.5776E-01

-4.1451E-01

2.4169E-01

-8.6680E-02

1.7337E-02

-1.4800E-03

S10

-5.0090E-02

3.3686E-02

-2.3450E-02

1.1235E-02

-2.5800E-03

-4.3000E-04

4.5600E-04

-1.1000E-04

9.8900E-06

TABLE 12

Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 6. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different angles of view. Fig. 12D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 6, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens according to embodiment 6 can achieve good imaging quality.

Example 7

An optical imaging lens according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application.

As shown in fig. 13, 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, a filter E6, and an image forming surface S13.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. Filter E8 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.

In the present embodiment, the total effective focal length f of the optical imaging lens is 12.80mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 12.95mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 2.61mm, and the maximum field angle FOV of the optical imaging lens is 22.8 °.

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

Watch 13

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

1.7200E-04

2.2006E-04

-3.7000E-04

4.1700E-04

-2.9000E-04

1.2100E-04

-3.1000E-05

4.3000E-06

-2.6000E-07

S2

4.4380E-03

5.6027E-03

-8.5700E-03

1.1417E-02

-9.5800E-03

4.6240E-03

-1.1400E-03

8.2500E-05

9.5000E-06

S3

-1.9980E-02

9.2087E-03

-1.5170E-02

2.3884E-02

-2.4580E-02

1.5407E-02

-5.7300E-03

1.1420E-03

-9.2000E-05

S4

5.6395E-02

-7.8682E-02

8.6997E-02

-8.0380E-02

5.6312E-02

-2.8070E-02

9.2620E-03

-1.8100E-03

1.5800E-04

S7

-4.5150E-02

4.7352E-02

-1.0076E-01

1.3606E-01

-1.1963E-01

6.7288E-02

-2.3180E-02

4.3830E-03

-3.4000E-04

S8

-1.0976E-01

2.2091E-01

-3.6592E-01

3.9648E-01

-2.9231E-01

1.4488E-01

-4.5770E-02

8.2400E-03

-6.4000E-04

S9

-1.2904E-01

3.0762E-01

-4.9331E-01

4.9690E-01

-3.3481E-01

1.5166E-01

-4.4180E-02

7.4480E-03

-5.5000E-04

S10

-8.9000E-03

5.9413E-02

-1.1105E-01

1.0686E-01

-6.3230E-02

2.3661E-02

-5.4200E-03

6.8900E-04

-3.7000E-05

TABLE 14

Fig. 14A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 7, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 14B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 7. Fig. 14C shows a distortion curve of the optical imaging lens of embodiment 7, which represents distortion magnitude values corresponding to different angles of view. Fig. 14D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 7, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 14A to 14D, the optical imaging lens according to embodiment 7 can achieve good imaging quality.

Example 8

An optical imaging lens according to embodiment 8 of the present application is described below with reference to fig. 15 to 16D. Fig. 15 shows a schematic structural diagram of an optical imaging lens according to embodiment 8 of the present application.

As shown in fig. 15, 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, a filter E6, and an image forming surface S13.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. Filter E8 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.

In the present embodiment, the total effective focal length f of the optical imaging lens is 13.06mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 12.90mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 2.65mm, and the maximum field angle FOV of the optical imaging lens is 22.7 °.

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

Watch 15

TABLE 16

Fig. 16A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 8, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 16B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 8. Fig. 16C shows a distortion curve of the optical imaging lens of embodiment 8, which represents distortion magnitude values corresponding to different angles of view. Fig. 16D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 8, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 16A to 16D, the optical imaging lens according to embodiment 8 can achieve good imaging quality.

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

Conditions/examples	1	2	3	4	5	6	7	8
									ImgH/f	0.19	0.19	0.19	0.20	0.20	0.20	0.20	0.20
f(mm)	14.44	14.35	13.50	13.30	13.13	13.23	12.80	13.06
									(R1+R5)/(f1+f3)	0.38	0.37	0.36	0.32	0.49	0.47	0.57	0.50
f2/f5	0.92	0.90	0.70	0.29	1.31	0.69	0.66	0.68
									FOV(°)	21.0	21.2	21.0	22.9	22.9	22.5	22.8	22.7
TTL/f	0.88	0.88	0.94	0.98	0.97	0.97	1.01	0.99
									R4/(R8+R9)	-0.50	-0.55	-0.48	-0.25	-0.22	-0.38	-0.14	-0.35
CT1/TTL×10	2.00	2.02	2.07	1.96	2.23	2.20	2.08	2.25
									f123/f45	-0.55	-0.53	-0.39	-0.39	-0.78	-0.48	-0.57	-0.52
T34/BFL	0.50	0.51	0.30	0.24	0.34	0.30	0.26	0.28
									SAG31/SAG11	0.55	0.60	0.64	0.74	1.20	0.56	0.52	0.59
(SAG51+SAG52)/(SAG41+SAG42)	0.73	0.73	0.62	0.68	0.29	0.84	0.76	0.83

TABLE 17

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 (10)

1. An optical imaging lens, in order from an object side to an image side along an optical axis, comprising:

a first lens having a positive optical power;

a second lens having a negative optical power;

a third lens having optical power;

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

a fifth lens element having a negative refractive power, the object-side surface of which is concave;

wherein the total effective focal length f of the optical imaging lens satisfies: 12mm < f <20 mm.

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

ImgH/f<0.3。

3. the optical imaging lens of claim 1, wherein the radius of curvature of the object-side surface of the first lens R1, the radius of curvature of the object-side surface of the third lens R5, the effective focal length of the first lens f1, and the effective focal length of the third lens f3 satisfy:

0.2<(R1+R5)/(f1+f3)<0.7。

4. the optical imaging lens of claim 1, wherein the effective focal length f2 of the second lens and the effective focal length f5 of the fifth lens satisfy:

0.2<f2/f5<1.4。

5. the optical imaging lens of claim 1, wherein the maximum field angle FOV of the optical imaging lens satisfies:

FOV<25°。

6. the optical imaging lens of claim 1, wherein a distance TTL between an object side surface of the first lens element and an imaging surface of the optical imaging lens on the optical axis and a total effective focal length f of the optical imaging lens satisfy:

TTL/f<1.1。

7. the optical imaging lens of claim 1, wherein the radius of curvature R4 of the image-side surface of the second lens, the radius of curvature R8 of the image-side surface of the fourth lens, and the radius of curvature R9 of the object-side surface of the fifth lens satisfy:

-0.6<R4/(R8+R9)<-0.1。

8. the optical imaging lens of claim 1, wherein the central thickness CT1 of the first lens on the optical axis and the distance TTL between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis satisfy:

1.8<CT1/TTL×10<2.3。

9. the optical imaging lens according to claim 1, wherein a combined focal length f123 of the first lens, the second lens, and the third lens and a combined focal length f45 of the fourth lens and the fifth lens satisfy:

-0.8<f123/f45<-0.3。

10. an optical imaging lens, in order from an object side to an image side along an optical axis, comprising:

a first lens having a positive optical power;

a second lens having a negative optical power;

a third lens having optical power;

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

a fifth lens element having a negative refractive power, the object-side surface of which is concave;

wherein the maximum field angle FOV of the optical imaging lens satisfies: FOV < 25.