WO2020001066A1 - Camera lens - Google Patents

Abstract

A camera lens, which comprises the following in sequence along the optical axis from an object side to an image side: a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), a fifth lens (L5), a sixth lens (L6), a seventh lens (L7), and an eighth lens (L8), wherein the first lens (L1) has positive focal power, and an object side surface (S1) thereof is a convex surface; the second lens (L2) has focal power, and an image side surface (S4) thereof is a convex surface; the third lens (L3) has a focal power; the fourth lens (L4) has a focal power; the fifth lens (L5) has a focal power; the sixth lens (L6) has a focal power; the seventh lens (L7) has a focal power; and the eighth lens (L8) has a focal power, an object side surface (S15) thereof is a convex surface, and an image side surface (S16) thereof is a concave surface. The distance TTL from the object side surface of the first lens (L1) to an imaging surface of the camera lens on the optical axis and half, labeled ImgH, of the length of a diagonal line of an effective pixel region of an electronic photosensor of the camera lens fulfill TTL/ImgH<1.65.

Description

Camera lens

Cross-reference to related applications

This application claims the priority and rights of a Chinese patent application filed with the Chinese Intellectual Property Office (CNIPA) on June 26, 2018, with a patent application number of 201810667822.3, which is incorporated herein by reference in its entirety.

Technical field

The present application relates to an imaging lens, and more particularly, the present application relates to an imaging lens including eight lenses.

Background technique

With the rapid development of portable electronic products such as smart phones, the market has increasingly higher requirements for shooting effects carried by mobile phones. Photosensitive elements commonly used in optical systems, such as image sensors such as electrically coupled devices (CCDs) and complementary metal oxide semiconductors (CMOS), are also moving toward large image planes and high pixel directions.

At present, conventional optical systems cannot meet the requirements of high pixelation, large aperture, and small size at the same time. In order to ensure that the handheld camera can obtain a small depth of field, a combination of virtual and real shooting, and can achieve clear shooting in dim light, the optical system configured on portable electronic products needs to have a large aperture, good imaging quality and high resolution.

Summary of the invention

The present application provides a camera lens that can at least partially or partially solve the above-mentioned at least one disadvantage in the prior art.

The present application provides such a camera lens, which may include, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, The seventh lens and the eighth lens. Among them, the first lens may have positive power and its object side may be convex; the second lens may have positive power or negative power and its image side may be convex; the third lens may have positive power or negative power ; The fourth lens has positive or negative power; the fifth lens has positive or negative power; the sixth lens has positive or negative power; the seventh lens has positive or negative power Power; the eighth lens has a positive power or a negative power, and the object side may be convex, and the image side may be concave.

In one embodiment, the distance TTL on the optical axis from the object side of the first lens to the imaging surface of the camera lens and half the diagonal length of the effective pixel area of the electronic light sensor element of the camera lens, ImgH, can satisfy TTL / ImgH <1.65 .

In one embodiment, the total effective focal length f of the camera lens and the entrance pupil diameter EPD of the camera lens may satisfy f / EPD <1.9.

In one embodiment, the total effective focal length f of the imaging lens and the effective focal length f1 of the first lens may satisfy f / f1 <0.7.

In one embodiment, the second lens may have a positive power, and the effective focal length f1 of the first lens and the effective focal length f2 of the second lens may satisfy 1 <f1 / f2 <1.5.

In one embodiment, the third lens may have a positive power, and the curvature radius R6 of the image side of the third lens and the effective focal length f3 of the third lens may satisfy -0.6 <R6 / f3 <0.

In one embodiment, the curvature radius R15 of the object side of the eighth lens and the curvature radius R16 of the image side of the eighth lens may satisfy 1 <R15 / R16 <1.5.

In one embodiment, the effective radius DT11 of the object side of the first lens and the effective radius DT82 of the image side of the eighth lens may satisfy 0.3 <DT11 / DT82 <0.8.

In one embodiment, the effective radius DT11 of the object side of the first lens and the effective radius DT52 of the image side of the fifth lens may satisfy 0.9 <DT11 / DT52 <1.3.

In one embodiment, the axial distance SAG42 between the intersection of the fourth lens image side and the optical axis to the effective radius vertex of the fourth lens image side and the center thickness CT4 of the fourth lens on the optical axis may satisfy 0.7 <SAG42 / CT4 <1.3.

In one embodiment, the object side of the sixth lens may be convex, and the image side may be concave.

In one embodiment, the on-axis distance SAG62 from the intersection of the sixth lens image side and the optical axis to the effective radius vertex of the sixth lens image side and the center thickness CT6 of the sixth lens on the optical axis may satisfy -0.5 <SAG62 / CT6 <0.

In one embodiment, the vertical distance YC62 from the critical point of the image side of the sixth lens to the optical axis and the effective radius DT62 of the image side of the sixth lens may satisfy 0.4 <YC62 / DT62 <0.9.

In one embodiment, the separation distance T34 on the optical axis of the third lens and the fourth lens and the separation distance T45 on the optical axis of the fourth lens and the fifth lens may satisfy 0 <T34 × 10 / T45 <0.5.

In one embodiment, the center thickness CT5 of the fifth lens on the optical axis, the center thickness CT6 of the sixth lens on the optical axis, the center thickness CT7 of the seventh lens on the optical axis, and the eighth lens on the optical axis. The center thickness CT8 can satisfy 0.5 <(CT5 + CT6) / (CT7 + CT8) <1.

In one embodiment, the sum ΣET of the edge thicknesses of the first lens to the eighth lens in a direction parallel to the optical axis and the sum of the center thicknesses of the first lens to the eighth lens on the optical axis ΣCT may satisfy 0.6 <ΣET / ΣCT≤1.

In one embodiment, the curvature radius R11 of the object side of the sixth lens and the curvature radius R12 of the image side of the sixth lens may satisfy 0 <| (R11-R12) / (R11 + R12) | <0.3.

In one embodiment, the curvature radius R11 of the object side of the sixth lens and the curvature radius R14 of the image side of the seventh lens may satisfy 0.7 <R11 / R14 <1.2.

This application uses eight lenses. By reasonably distributing the power, surface shape, center thickness of each lens, and the axial distance between each lens, the above-mentioned camera lens has a large aperture, high imaging quality, and small size. And at least one beneficial effect such as good processability.

BRIEF DESCRIPTION OF THE DRAWINGS

With reference to the accompanying drawings, other features, objects, and advantages of the present application will become more apparent through the following detailed description of the non-limiting embodiments. In the drawings:

1 is a schematic structural diagram of an imaging lens according to Embodiment 1 of the present application;

2A to 2E respectively show the on-axis chromatic aberration curve, astigmatism curve, distortion curve, magnification chromatic aberration curve, and contrast degree curve of the camera lens of Example 1;

3 is a schematic structural diagram of an imaging lens according to Embodiment 2 of the present application;

4A to 4E respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, magnification chromatic aberration curves, and contrast degree curves of the camera lens of Example 2;

5 is a schematic structural diagram of an imaging lens according to Embodiment 3 of the present application;

6A to 6E respectively show the on-axis chromatic aberration curve, astigmatism curve, distortion curve, magnification chromatic aberration curve, and contrast degree curve of the camera lens of Example 3;

7 is a schematic structural diagram of an imaging lens according to Embodiment 4 of the present application;

8A to 8E respectively show the on-axis chromatic aberration curve, astigmatism curve, distortion curve, magnification chromatic aberration curve, and contrast degree curve of the camera lens of Example 4;

9 is a schematic structural diagram of an imaging lens according to Embodiment 5 of the present application;

FIG. 10A to FIG. 10E respectively show the on-axis chromatic aberration curve, astigmatism curve, distortion curve, magnification chromatic aberration curve, and contrast degree curve of the imaging lens of Example 5;

11 is a schematic structural diagram of an imaging lens according to Embodiment 6 of the present application;

FIG. 12A to FIG. 12E respectively show the on-axis chromatic aberration curve, astigmatism curve, distortion curve, magnification chromatic aberration curve, and contrast degree curve of the camera lens of Example 6;

13 is a schematic structural diagram of an imaging lens according to Embodiment 7 of the present application;

14A to 14E respectively show the on-axis chromatic aberration curve, astigmatism curve, distortion curve, magnification chromatic aberration curve, and contrast degree curve of the imaging lens of Example 7.

FIG. 15 schematically shows a critical point L of the image side of the sixth lens and a vertical distance YC62 from the critical point L to the optical axis.

detailed description

In order to better understand 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 these detailed descriptions are merely descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the description, the same reference numerals refer to the same elements. 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 of the first, second, third, etc. are only used to distinguish one feature from another feature, and do not indicate any limitation on the feature. Therefore, without departing from the teachings of this application, a first lens discussed below may also be referred to as a second lens or a third lens.

In the drawings, for convenience of explanation, the thickness, size, and shape of the lens have been slightly exaggerated. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are only examples and are 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 area; if the lens surface is concave and the concave position is not defined, it means that the lens surface is at least in the paraxial area Concave. The surface closer to the object side of each lens is called the object side of the lens; the surface closer to the image side of each lens is called the image side of the lens.

It should also be understood that the terms "including", "including", "having", "including" and / or "including" when used in this specification indicate the presence of stated features, elements and / or components But does not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when an expression such as "at least one of" appears after the list of listed features, the entire listed feature is modified, rather than the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to 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 should also be understood that terms (e.g. terms defined in commonly used dictionaries) should be interpreted to have a meaning consistent with their meaning in the context of the relevant technology and will not be interpreted in an idealized or overly formal sense unless This is clearly defined in this article.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The application will be described in detail below with reference to the drawings and embodiments. The features, principles, and other aspects of this application are described in detail below.

The imaging lens according to the exemplary embodiment of the present application may include, for example, eight lenses having optical power, that is, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, Lens and eighth lens. These eight lenses are arranged in order from the object side to the image side along the optical axis, and there can be an air gap between each adjacent lens.

In an exemplary embodiment, the first lens may have a positive power and its object side may be convex; the second lens may have a positive or negative power and its image side may be a convex; the third lens has a positive power Or negative power; fourth lens has positive or negative power; fifth lens has positive or negative power; sixth lens has positive or negative power; seventh lens has positive light Power or negative power; the eighth lens has positive power or negative power, and its object side can be convex, and its image side can be concave.

In an exemplary embodiment, the second lens may have a positive optical power, and an object side thereof may be a convex surface.

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

In an exemplary embodiment, the sixth lens may have a positive optical power, an object side thereof may be convex, and an image side thereof may be concave.

In an exemplary embodiment, the object-side surface of the seventh lens may be convex, and the image-side surface may be concave.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression f / EPD <1.9, where f is the total effective focal length of the imaging lens and EPD is the entrance pupil diameter of the imaging lens. More specifically, f and EPD can further satisfy 1.5 <f / EPD <1.9, such as 1.55 ≦ f / EPD ≦ 1.83. Satisfying the conditional f / EPD <1.9 can make the optical system have a large aperture advantage, enhance the imaging effect of the system in a weak light environment, and obtain the shooting effect of the virtual and real frame, highlighting the subject; at the same time, it can also reduce the edge view Field aberration.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional TTL / ImgH <1.65, where TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the imaging lens, and ImgH is the The diagonal length of the effective pixel area of the electronic light sensor is half. More specifically, TTL and ImgH can further satisfy 1.4 ≦ TTL / ImgH ≦ 1.6, such as 1.46 ≦ TTL / ImgH ≦ 1.55. Reasonably controlling the ratio between TTL and ImgH can effectively compress the system size while ensuring a large image surface, thereby meeting the compact size characteristics of the lens.

In an exemplary embodiment, the imaging lens of the present application may satisfy a conditional expression f / f1 <0.7, where f is a total effective focal length of the imaging lens and f1 is an effective focal length of the first lens. More specifically, f and f1 can further satisfy 0.4 ≦ f / f1 ≦ 0.6, for example, 0.47 ≦ f / f1 ≦ 0.51. Reasonably controlling the positive power of the first lens can effectively adjust the position of the light; at the same time, satisfying the conditional expression f / f1 <0.7 is also conducive to shortening the overall length of the camera lens.

In an exemplary embodiment, the second lens of the imaging lens of the present application may have positive power and may satisfy the conditional expression 1 <f1 / f2 <1.5, where f1 is an effective focal length of the first lens and f2 is a second Effective focal length of the lens. More specifically, f1 and f2 can further satisfy 1.15 ≦ f1 / f2 ≦ 1.34. Reasonably set the ratio of the effective focal length of the first lens to the effective focal length of the second lens, and ensure that the second lens also has a positive power when the power of the first lens is positive, which can improve the optical system's ability to converge light. Adjust the focus position of the light to shorten the total system length.

In an exemplary embodiment, the third lens of the imaging lens of the present application may have positive power and may satisfy a conditional expression of -0.6 <R6 / f3 <0, where R6 is a radius of curvature of the image side of the third lens, f3 is the effective focal length of the third lens. More specifically, R6 and f3 can further satisfy -0.55≤R6 / f3≤-0.30. The conditional expression -0.6 <R6 / f3 <0 is satisfied, which can effectively balance the astigmatism of the system and shorten the back focal length of the system, thereby further ensuring the miniaturization of the optical system.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression 1 <R15 / R16 <1.5, where R15 is the curvature radius of the object side of the eighth lens and R16 is the curvature radius of the image side of the eighth lens. More specifically, R15 and R16 can further satisfy 1.12 ≦ R15 / R16 ≦ 1.33. Reasonably setting the curvature radius of the object side and the image side of the eighth lens can make the optical system better match the main light angle of the chip.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression 0.3 <DT11 / DT82 <0.8, where DT11 is an effective radius of the object side of the first lens and DT82 is an effective radius of the image side of the eighth lens. More specifically, DT11 and DT82 can further satisfy 0.4 ≦ DT11 / DT82 ≦ 0.7, for example, 0.52 ≦ DT11 / DT82 ≦ 0.60. Reasonably controlling the ratio of the effective radius of the object side of the first lens to the effective radius of the image side of the eighth lens can make the optical system meet the structural characteristics of small size.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression 0.9 <DT11 / DT52 <1.3, where DT11 is an effective radius of the object side of the first lens and DT52 is an effective radius of the image side of the fifth lens. More specifically, DT11 and DT52 can further satisfy 0.98 ≦ DT11 / DT52 ≦ 1.21. Reasonably controlling the ratio of the effective radius of the object side of the first lens to the effective radius of the image side of the fifth lens is beneficial to the system assembly and to ensure the relative contrast of the lens.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression 0.7 <SAG42 / CT4 <1.3, where SAG42 is a distance between the intersection of the fourth lens image side and the optical axis to the effective radius vertex of the fourth lens image side. On-axis distance, CT4 is the center thickness of the fourth lens on the optical axis. More specifically, SAG42 and CT4 can further satisfy 0.77 ≦ SAG42 / CT4 ≦ 1.12. Satisfy the conditional expression 0.7 <SAG42 / CT4 <1.3, which can adjust the degree of matching with the chip's main light angle, and can increase the freedom of change of the lens, and improve the system's ability to correct astigmatism and field curvature.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression -0.5 <SAG62 / CT6 <0, where SAG62 is between the intersection of the sixth lens image side and the optical axis to the effective radius vertex of the sixth lens image side The distance on the axis, CT6 is the center thickness of the sixth lens on the optical axis. More specifically, SAG62 and CT6 can further satisfy -0.46≤SAG62 / CT6≤-0.22. Meet the conditional expression -0.5 <SAG62 / CT6 <0, which can reasonably adjust the system's main light angle and adjust the degree of matching with the chip's main light angle; at the same time, it can effectively improve the relative brightness of the system and the image surface clarity .

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression 0.4 <YC62 / DT62 <0.9, where YC62 is a critical point of the image side of the sixth lens (the critical point of the image side of the sixth lens refers to the sixth lens On the side of the mirror, except for the point of intersection with the optical axis, the point tangent to the tangent plane perpendicular to the optical axis, for example, the vertical distance from the critical point L) schematically shown in FIG. 15 to the optical axis, DT62 is the sixth transmission The effective radius of the mirrored side. More specifically, YC62 and DT62 can further satisfy 0.6 ≦ YC62 / DT62 ≦ 0.7, such as 0.66 ≦ YC62 / DT62 ≦ 0.68. Reasonably setting the ratio of YC62 to DT62 can effectively reduce the lens size of the optical system and avoid the excessive size of the camera lens, thereby meeting the requirements of a compact system.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression 0 <T34 × 10 / T45 <0.5, where T34 is the distance between the third lens and the fourth lens on the optical axis, and T45 is the fourth lens The distance from the fifth lens on the optical axis. More specifically, T34 and T45 can further satisfy 0.3 ≦ T34 × 10 / T45 ≦ 0.45, such as 0.32 ≦ T34 × 10 / T45 ≦ 0.41. Reasonably setting the ratio of T34 to T45 can ensure that the optical system has the characteristics of light, thin and compact, which can be widely used in high-performance portable electronic products.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression 0.5 <(CT5 + CT6) / (CT7 + CT8) <1, where CT5 is the center thickness of the fifth lens on the optical axis, and CT6 is the first The central thickness of the six lenses on the optical axis, CT7 is the central thickness of the seventh lens on the optical axis, and CT8 is the central thickness of the eighth lens on the optical axis. More specifically, CT5, CT6, CT7, and CT8 can further satisfy 0.68 ≦ (CT5 + CT6) / (CT7 + CT8) ≦ 0.92. Reasonably assigning the center thicknesses of the fifth lens, the sixth lens, the seventh lens, and the eighth lens on the optical axis can effectively reduce the size of the optical system, avoid the volume of the camera lens, and reduce the difficulty of lens assembly To achieve higher space utilization.

In an exemplary embodiment, the imaging lens of the present application may satisfy a conditional expression 0.6 <ΣET / ΣCT≤1, where ΣET is an edge thickness of the first lens to the eighth lens in a direction parallel to the optical axis direction. The sum, ΣCT is the sum of the center thicknesses of the first to eighth lenses on the optical axis, respectively. More specifically, ΣET and ΣCT can further satisfy 0.78 ≦ ΣET / ΣCT ≦ 1.00. Satisfying the conditional expression 0.6 <∑ET / ΣCT≤1, which can make the lens edge thickness and lens center thickness balance and stability, improve space utilization, reduce lens processing and assembly difficulties; and while ensuring the miniaturization of the lens, Enhance the system's ability to correct aberrations.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression 0 <| (R11-R12) / (R11 + R12) | <0.3, where R11 is the radius of curvature of the object side of the sixth lens, and R12 is The radius of curvature of the image side of the sixth lens. More specifically, R11 and R12 can further satisfy 0 <| (R11-R12) / (R11 + R12) | <0.15, for example, 0.03 ≦ | (R11-R12) / (R11 + R12) | ≦ 0.12. The rational distribution of the curvature radii of the object side and the image side of the sixth lens helps to adjust the optical power on both sides of the sixth lens of the optical system, so that the optical system has a strong ability to balance astigmatism.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression 0.7 <R11 / R14 <1.2, where R11 is the curvature radius of the object side of the sixth lens and R14 is the curvature radius of the image side of the seventh lens. More specifically, R11 and R14 can further satisfy 0.85 ≦ R11 / R14 ≦ 1.03. The curvature radius of the object side of the sixth lens and the curvature radius of the image side of the seventh lens are reasonably allocated to ensure that the unevenness of the object side of the sixth lens and the image side of the seventh lens are consistent, and the distortion of the system can be effectively balanced.

In an exemplary embodiment, the above-mentioned imaging lens may further include at least one diaphragm to improve the imaging quality of the lens. Alternatively, the diaphragm may be disposed between the third lens and the fourth lens. Optionally, the above-mentioned imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element on the imaging surface.

The imaging lens according to the above embodiment of the present application may employ multiple lenses, such as the eight lenses described above. By rationally distributing the power, surface shape, center thickness of each lens, and the axial distance between each lens, the size of the lens can be effectively reduced, the sensitivity of the lens can be reduced, and the processability of the lens can be improved. This makes the camera lens more conducive to production and processing and is applicable to portable electronic products such as smart phones. At the same time, the imaging lens configured as described above can have beneficial effects such as a large aperture, high imaging quality, miniaturization, and good processability.

In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. Aspheric lenses are characterized by a curvature that varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the lens center to the periphery of the lens, an aspheric lens has better curvature radius characteristics, and has the advantages of improving distortion and astigmatic aberration. The use of aspheric lenses can eliminate as much aberrations as possible during imaging, thereby improving imaging quality.

However, those skilled in the art should understand that without departing from the technical solution claimed in the present application, the number of lenses constituting the camera lens can be changed to obtain various results and advantages described in this specification. For example, although eight lenses have been described as an example in the embodiment, the imaging lens is not limited to including eight lenses. If necessary, the camera lens may include other numbers of lenses. Specific examples of the imaging lens applicable to the above embodiments will be further described below with reference to the drawings.

Example 1

Hereinafter, an imaging lens according to Embodiment 1 of the present application will be described with reference to FIGS. 1 to 2E. FIG. 1 is a schematic structural diagram of an imaging lens according to Embodiment 1 of the present application.

As shown in FIG. 1, an imaging lens according to an exemplary embodiment of the present application includes: a first lens L1, a second lens L2, a third lens L3, an aperture STO, and a fourth lens in order from the object side to the image side along the optical axis. The lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the filter L9, and the imaging surface S19.

The first lens L1 has a positive refractive power, and an object side surface S1 thereof is a convex surface, and an image side surface S2 is a concave surface. The second lens L2 has a positive power, and the object side surface S3 is a convex surface, and the image side surface S4 is a convex surface. The third lens L3 has a positive power, and the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface. The fourth lens L4 has a negative power, and the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface. The fifth lens L5 has a positive power, and the object side surface S9 is a concave surface, and the image side surface S10 is a convex surface. The sixth lens L6 has a positive power, and the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The seventh lens L7 has a negative power, and the object side surface S13 is a convex surface, and the image side surface S14 is a concave surface. The eighth lens L8 has a negative power, and the object side surface S15 is a convex surface, and the image side surface S16 is a concave surface. The filter L9 has an object side surface S17 and an image side surface S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.

Table 1 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 1. The units of the radius of curvature and thickness are millimeters (mm).

Table 1

As can be seen from Table 1, the object side and the image side of any one of the first lens L1 to the eighth lens L8 are aspherical surfaces. In this embodiment, the surface type x of each aspheric lens can be defined using, but not limited to, the following aspheric formula:

Where x is the distance vector from the vertex of the aspheric surface when the aspheric surface is at the height h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R The inverse of the radius of curvature R in 1); k is the conic coefficient (given in Table 1); Ai is the correction coefficient of the aspherical i-th order. Table 2 below shows the higher-order coefficients A ₄ , A ₆ , A ₈ , A ₁₀ , A ₁₂ , A ₁₄ , A ₁₆ , A _18, and A ₂₀ that can be used for each aspherical mirror surface S1-S16 in Example 1. .

Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.8443E-02 1.3417E-01 -5.8304E-01 1.0874E + 00 -1.2225E + 00 8.4746E-01 -3.5262E-01 8.0849E-02 -7.8658E-03 S2 -1.5704E-02 -5.7637E-02 -1.8760E-01 6.4095E-01 -8.7566E-01 6.9431E-01 -3.3020E-01 8.7239E-02 -9.8362E-03 S3 -3.0419E-02 7.5150E-02 -6.4272E-01 1.6500E + 00 -2.1961E + 00 1.7637E + 00 -8.6092E-01 2.3462E-01 -2.7307E-02 S4 1.3419E-02 -1.8463E-02 -9.7519E-02 4.0147E-01 -7.0012E-01 6.9304E-01 -4.0160E-01 1.2670E-01 -1.6763E-02 S5 -1.2228E-02 5.4042E-02 -3.9273E-02 -1.7391E-01 4.5225E-01 -4.9556E-01 2.9413E-01 -9.2506E-02 1.2101E-02 S6 -1.3278E-01 7.6758E-01 -2.5392E + 00 4.8470E + 00 -5.7566E + 00 4.3228E + 00 -1.9941E + 00 5.1512E-01 -5.6993E-02 S7 -1.7843E-01 9.2051E-01 -3.4534E + 00 7.7551E + 00 -1.0932E + 01 9.8377E + 00 -5.4943E + 00 1.7368E + 00 -2.3759E-01 S8 -7.4856E-02 1.0810E-01 -3.1892E-01 7.0729E-01 -1.0700E + 00 1.1723E + 00 -8.8089E-01 3.9201E-01 -7.5483E-02 S9 -3.7457E-02 2.2812E-01 -9.8023E-01 2.1942E + 00 -3.0007E + 00 2.5726E + 00 -1.3561E + 00 4.0340E-01 -5.1936E-02 S10 -5.0299E-02 1.5177E-01 -5.7617E-01 1.0471E + 00 -1.1470E + 00 7.9607E-01 -3.4567E-01 8.6322E-02 -9.4456E-03 S11 1.0162E-01 -5.7223E-02 -1.4563E-01 3.1074E-01 -3.1646E-01 1.8983E-01 -6.8196E-02 1.3524E-02 -1.1293E-03 S12 -5.8966E-02 1.1933E-01 -1.7065E-01 1.3793E-01 -7.3067E-02 2.5216E-02 -5.3962E-03 6.4720E-04 -3.3153E-05 S13 -1.2443E-02 -1.2753E-01 1.8007E-01 -1.6753E-01 9.2634E-02 -3.0370E-02 5.8802E-03 -6.2534E-04 2.8247E-05 S14 -1.5540E-01 8.8377E-02 -4.5964E-02 1.0973E-02 1.6228E-04 -6.7227E-04 1.4945E-04 -1.4105E-05 5.0508E-07 S15 -4.8396E-01 2.7635E-01 -9.6443E-02 2.1298E-02 -2.9820E-03 2.6396E-04 -1.5182E-05 6.1435E-07 -1.5454E-08 S16 -3.3601E-01 2.1775E-01 -1.0397E-01 3.5616E-02 -8.3294E-03 1.2683E-03 -1.1892E-04 6.2027E-06 -1.3742E-07

Table 2

Table 3 shows the total optical length TTL (that is, the distance from the object side S1 to the imaging surface S19 of the first lens L1 on the optical axis) of the camera lens in Example 1, and the effective pixel region pair of the electronic light sensor element of the camera lens The half of the angular length is ImgH, the total effective focal length f of the camera lens, and the effective focal lengths f1 to f8 of each lens.

TTL (mm) 5.38 f4 (mm) -7.90 ImgH (mm) 3.50 f5 (mm) 243.82 f (mm) 4.20 f6 (mm) 28.32 f1 (mm) 8.42 f7 (mm) -14.54 f2 (mm) 6.41 f8 (mm) -60.86 f3 (mm) 27.13 Zh Zh

table 3

FIG. 2A shows an on-axis chromatic aberration curve of the imaging lens of Example 1, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens. FIG. 2B shows an astigmatism curve of the imaging lens of Example 1, which represents a meridional image plane curvature and a sagittal image plane curvature. FIG. 2C shows the distortion curve of the imaging lens of Example 1, which represents the value of the distortion magnitude corresponding to different image heights. FIG. 2D shows the magnification chromatic aberration curve of the imaging lens of Example 1, which represents the deviation of different image heights on the imaging plane after light passes through the lens. FIG. 2E shows the contrast degree curve of the imaging lens of Example 1, which represents the contrast degree corresponding to different image heights on the imaging surface. It can be known from FIG. 2A to FIG. 2E that the imaging lens provided in Embodiment 1 can achieve good imaging quality.

Example 2

Hereinafter, an imaging lens according to Embodiment 2 of the present application will be described with reference to FIGS. 3 to 4E. In this embodiment and the following embodiments, for the sake of brevity, a description similar to that in Embodiment 1 will be omitted. FIG. 3 is a schematic structural diagram of an imaging lens according to Embodiment 2 of the present application.

As shown in FIG. 3, the imaging lens according to the exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, an aperture STO, and a fourth lens. The lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the filter L9, and the imaging surface S19.

The first lens L1 has a positive refractive power, and an object side surface S1 thereof is a convex surface, and an image side surface S2 is a concave surface. The second lens L2 has a positive power, and the object side surface S3 is a convex surface, and the image side surface S4 is a convex surface. The third lens L3 has a negative power, and the object side surface S5 is a concave surface, and the image side surface S6 is a concave surface. The fourth lens L4 has a positive power, and the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface. The fifth lens L5 has a negative power, and the object side surface S9 is a concave surface, and the image side surface S10 is a convex surface. The sixth lens L6 has a positive power, and the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The seventh lens L7 has a negative power, and the object side surface S13 is a convex surface, and the image side surface S14 is a concave surface. The eighth lens L8 has a negative power, and the object side surface S15 is a convex surface, and the image side surface S16 is a concave surface. The filter L9 has an object side surface S17 and an image side surface S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.

Table 4 shows the surface type, the radius of curvature, the thickness, the material, and the conic coefficient of each lens of the imaging lens of Example 2. The units of the radius of curvature and thickness are millimeters (mm). Table 5 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 2, where each aspheric surface type can be defined by the formula (1) given in the above Embodiment 1. Table 6 shows the total optical length TTL of the camera lens in Example 2, the half of the diagonal length of the effective pixel area of the electronic light sensor element of the camera lens, ImgH, the total effective focal length f of the camera lens, and the effective focal lengths f1 to f8 of each lens .

Table 4

Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.8401E-02 1.9961E-01 -7.8604E-01 1.4566E + 00 -1.6361E + 00 1.1367E + 00 -4.7584E-01 1.1012E-01 -1.0840E-02 S2 -7.3500E-03 -8.7970E-02 -8.7580E-02 3.4661E-01 -3.6316E-01 1.8765E-01 -4.6210E-02 2.7890E-03 5.3300E-04 S3 -9.1230E-02 5.6202E-01 -2.4765E + 00 5.5936E + 00 -7.3554E + 00 5.9529E + 00 -2.9261E + 00 8.0156E-01 -9.3870E-02 S4 3.5200E-02 -2.6496E-01 8.6460E-01 -1.6134E + 00 1.8554E + 00 -1.3380E + 00 5.8576E-01 -1.4050E-01 1.3879E-02 S5 -2.6500E-02 2.6665E-01 -1.0741E + 00 2.5316E + 00 -3.7858E + 00 3.5940E + 00 -2.0839E + 00 6.7118E-01 -9.1910E-02 S6 -1.5052E-01 6.8083E-01 -1.6282E + 00 1.6754E + 00 5.1766E-02 -1.8310E + 00 1.8048E + 00 -7.5683E-01 1.2189E-01 S7 -2.2572E-01 1.2524E + 00 -4.5058E + 00 9.8413E + 00 -1.3848E + 01 1.2727E + 01 -7.3925E + 00 2.4617E + 00 -3.5754E-01 S8 -1.6970E-02 -3.5718E-01 2.0912E + 00 -6.5087E + 00 1.1874E + 01 -1.3115E + 01 8.6527E + 00 -3.1400E + 00 4.8265E-01 S9 -3.1500E-02 1.9952E-01 -9.8735E-01 2.4262E + 00 -3.5963E + 00 3.3134E + 00 -1.8627E + 00 5.8675E-01 -7.9520E-02 S10 -3.4800E-02 8.8086E-02 -4.1005E-01 7.5573E-01 -8.0628E-01 5.3662E-01 -2.2091E-01 5.1838E-02 -5.3000E-03 S11 7.7659E-02 2.0260E-02 -2.6749E-01 4.2047E-01 -3.7626E-01 2.0928E-01 -7.1440E-02 1.3637E-02 -1.1000E-03 S12 -7.2510E-02 1.6346E-01 -2.1655E-01 1.5842E-01 -7.4230E-02 2.2556E-02 -4.2900E-03 4.6500E-04 -2.2000E-05 S13 -2.6580E-02 -1.5695E-01 2.4619E-01 -2.3125E-01 1.2786E-01 -4.2140E-02 8.2420E-03 -8.9000E-04 4.0800E-05 S14 -1.2756E-01 2.8757E-02 1.4040E-02 -2.3080E-02 1.1798E-02 -3.1000E-03 4.5300E-04 -3.5000E-05 1.1200E-06 S15 -4.8173E-01 2.7129E-01 -9.0670E-02 1.7687E-02 -1.6800E-03 -1.4000E-05 1.9600E-05 -1.7000E-06 5.1600E-08 S16 -3.8187E-01 2.6673E-01 -1.3583E-01 4.8680E-02 -1.1700E-02 1.8120E-03 -1.7000E-04 9.1000E-06 -2.0000E-07

table 5

TTL (mm) 5.43 f4 (mm) 499.90 ImgH (mm) 3.50 f5 (mm) -69.40 f (mm) 4.04 f6 (mm) 22.68 f1 (mm) 8.67 f7 (mm) -14.13 f2 (mm) 7.54 f8 (mm) -19.53 f3 (mm) -44.29 Zh Zh

Table 6

FIG. 4A shows an on-axis chromatic aberration curve of the imaging lens of Example 2, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens. FIG. 4B shows the astigmatism curve of the imaging lens of Example 2, which represents a meridional image plane curvature and a sagittal image plane curvature. FIG. 4C shows a distortion curve of the imaging lens of Example 2, which represents the value of the distortion magnitude corresponding to different image heights. FIG. 4D shows a magnification chromatic aberration curve of the imaging lens of Example 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. FIG. 4E shows a contrast degree curve of the imaging lens of Example 2, which represents the contrast degree corresponding to different image heights on the imaging surface. As can be seen from FIGS. 4A to 4E, the imaging lens provided in Embodiment 2 can achieve good imaging quality.

Example 3

An imaging lens according to Embodiment 3 of the present application is described below with reference to FIGS. 5 to 6E. FIG. 5 is a schematic structural diagram of an imaging lens according to Embodiment 3 of the present application.

As shown in FIG. 5, the imaging lens according to the exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, an aperture STO, and a fourth lens. The lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the filter L9, and the imaging surface S19.

The first lens L1 has a positive refractive power, and an object side surface S1 thereof is a convex surface, and an image side surface S2 is a concave surface. The second lens L2 has a positive power, and the object side surface S3 is a convex surface, and the image side surface S4 is a convex surface. The third lens L3 has a positive power, and the object side surface S5 is a convex surface, and the image side surface S6 is a convex surface. The fourth lens L4 has a negative power, and the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface. The fifth lens L5 has a positive power, and its object side surface S9 is a concave surface, and its image side surface S10 is a convex surface. The sixth lens L6 has a positive power, and the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The seventh lens L7 has a negative power, and the object side surface S13 is a convex surface, and the image side surface S14 is a concave surface. The eighth lens L8 has a negative power, and the object side surface S15 is a convex surface, and the image side surface S16 is a concave surface. The filter L9 has an object side surface S17 and an image side surface S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.

Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 3. The units of the radius of curvature and thickness are millimeters (mm). Table 8 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 3, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above. Table 9 shows the total optical length TTL of the camera lens in Example 3, half the diagonal length of the effective pixel area of the electronic light sensor element of the camera lens, ImgH, the total effective focal length f of the camera lens, and the effective focal lengths f1 to f8 of each lens. .

Table 7

Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.8572E-02 1.3440E-01 -5.8395E-01 1.0854E + 00 -1.2149E + 00 8.3872E-01 -3.4772E-01 7.9476E-02 -7.7117E-03 S2 -1.5497E-02 -5.4624E-02 -1.9917E-01 6.6277E-01 -8.9965E-01 7.0995E-01 -3.3604E-01 8.8340E-02 -9.9096E-03 S3 -3.6357E-02 1.1573E-01 -7.7052E-01 1.8760E + 00 -2.4382E + 00 1.9241E + 00 -9.2520E-01 2.4893E-01 -2.8665E-02 S4 1.4198E-02 -2.7460E-02 -5.7126E-02 3.1017E-01 -5.8431E-01 6.0910E-01 -3.6889E-01 1.2120E-01 -1.6671E-02 S5 -1.3018E-02 6.2701E-02 -8.4126E-02 -4.9824E-02 2.4544E-01 -2.8220E-01 1.6088E-01 -4.6278E-02 5.2484E-03 S6 -1.3330E-01 7.8273E-01 -2.6056E + 00 4.9928E + 00 -5.9516E + 00 4.4893E + 00 -2.0830E + 00 5.4247E-01 -6.0744E-02 S7 -2.0437E-01 1.1916E + 00 -4.7650E + 00 1.1381E + 01 -1.7063E + 01 1.6284E + 01 -9.6063E + 00 3.1944E + 00 -4.5796E-01 S8 -6.7900E-02 1.6709E-02 1.7130E-01 -7.8254E-01 1.7149E + 00 -2.0971E + 00 1.4664E + 00 -5.4779E-01 8.4913E-02 S9 -3.7403E-02 2.4340E-01 -1.0917E + 00 2.5536E + 00 -3.6510E + 00 3.2727E + 00 -1.7999E + 00 5.5628E-01 -7.4005E-02 S10 -4.6485E-02 1.2702E-01 -5.0121E-01 9.2081E-01 -1.0219E + 00 7.2206E-01 -3.1985E-01 8.1322E-02 -9.0167E-03 S11 9.8508E-02 -5.0609E-02 -1.4611E-01 3.0050E-01 -3.0329E-01 1.8180E-01 -6.5436E-02 1.3004E-02 -1.0875E-03 S12 -5.7322E-02 1.1014E-01 -1.4946E-01 1.1329E-01 -5.6828E-02 1.8845E-02 -3.9247E-03 4.6275E-04 -2.3486E-05

S13 -1.4005E-02 -1.1884E-01 1.6365E-01 -1.5136E-01 8.3371E-02 -2.7153E-02 5.2102E-03 -5.4822E-04 2.4478E-05 S14 -1.5840E-01 9.7860E-02 -5.7930E-02 1.9380E-02 -3.4224E-03 2.6871E-04 1.6784E-06 -1.4196E-06 4.8679E-08 S15 -4.8143E-01 2.7157E-01 -9.1473E-02 1.8297E-02 -1.9094E-03 3.3810E-05 1.3916E-05 -1.3829E-06 4.1943E-08 S16 -3.2956E-01 2.0834E-01 -9.7506E-02 3.3089E-02 -7.7312E-03 1.1820E-03 -1.1162E-04 5.8775E-06 -1.3171E-07

Table 8

TTL (mm) 5.40 f4 (mm) -7.87 ImgH (mm) 3.50 f5 (mm) 321.42 f (mm) 4.17 f6 (mm) 28.47 f1 (mm) 8.42 f7 (mm) -14.65 f2 (mm) 6.70 f8 (mm) -65.91 f3 (mm) 22.43 Zh Zh

Table 9

FIG. 6A illustrates an on-axis chromatic aberration curve of the imaging lens of Example 3, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens. FIG. 6B shows the astigmatism curve of the imaging lens of Example 3, which represents a meridional image plane curvature and a sagittal image plane curvature. FIG. 6C illustrates a distortion curve of the imaging lens of Example 3, which represents the magnitude of distortion corresponding to different image heights. FIG. 6D shows the magnification chromatic aberration curve of the imaging lens of Example 3, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 6E shows the contrast degree curve of the imaging lens of Example 3, which represents the contrast degree corresponding to different image heights on the imaging surface. It can be seen from FIGS. 6A to 6E that the imaging lens provided in Embodiment 3 can achieve good imaging quality.

Example 4

An imaging lens according to Embodiment 4 of the present application is described below with reference to FIGS. 7 to 8E. FIG. 7 is a schematic structural diagram of an imaging lens according to Embodiment 4 of the present application.

As shown in FIG. 7, the imaging lens according to the exemplary embodiment of the present application includes: a first lens L1, a second lens L2, a third lens L3, an aperture STO, and a fourth The lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the filter L9, and the imaging surface S19.

The first lens L1 has a positive refractive power, and an object side surface S1 thereof is a convex surface, and an image side surface S2 is a concave surface. The second lens L2 has a positive power, and the object side surface S3 is a convex surface, and the image side surface S4 is a convex surface. The third lens L3 has a positive power, and the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface. The fourth lens L4 has a negative power, and the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface. The fifth lens L5 has a negative power, and the object side surface S9 is a concave surface, and the image side surface S10 is a convex surface. The sixth lens L6 has a positive power, and the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The seventh lens L7 has a positive power, and the object side surface S13 is a convex surface, and the image side surface S14 is a concave surface. The eighth lens L8 has a negative power, and the object side surface S15 is a convex surface, and the image side surface S16 is a concave surface. The filter L9 has an object side surface S17 and an image side surface S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.

Table 10 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 4, where the units of the radius of curvature and thickness are millimeters (mm). Table 11 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 4, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above. Table 12 shows the total optical length TTL of the camera lens in Example 4, half the diagonal length of the effective pixel area of the electronic light sensor element of the camera lens, ImgH, the total effective focal length f of the camera lens, and the effective focal lengths f1 to f8 of each lens. .

Table 10

Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 3.1409E-02 1.0438E-01 -4.8039E-01 8.9938E-01 -1.0163E + 00 7.0857E-01 -2.9637E-01 6.8241E-02 -6.6600E-03 S2 -2.0604E-02 -2.9340E-02 -2.7862E-01 8.4657E-01 -1.1768E + 00 9.6528E-01 -4.7384E-01 1.2825E-01 -1.4690E-02 S3 -2.3751E-02 1.7939E-02 -4.4019E-01 1.2863E + 00 -1.8384E + 00 1.5720E + 00 -8.1235E-01 2.3258E-01 -2.8203E-02 S4 2.2590E-02 -1.2684E-01 4.4732E-01 -1.0288E + 00 1.4657E + 00 -1.2824E + 00 6.7485E-01 -1.9711E-01 2.4689E-02 S5 -6.3138E-03 -3.5997E-03 2.6452E-01 -1.0287E + 00 1.8251E + 00 -1.8136E + 00 1.0478E + 00 -3.3029E-01 4.4041E-02 S6 -1.4261E-01 8.4381E-01 -2.8603E + 00 5.6604E + 00 -7.0269E + 00 5.5497E + 00 -2.7066E + 00 7.4323E-01 -8.7955E-02 S7 -1.8538E-01 9.7239E-01 -3.6476E + 00 8.2904E + 00 -1.1954E + 01 1.1101E + 01 -6.4567E + 00 2.1463E + 00 -3.1174E-01 S8 -7.0092E-02 -3.1173E-03 5.3843E-01 -2.6257E + 00 6.4224E + 00 -8.9644E + 00 7.2472E + 00 -3.1639E + 00 5.7836E-01 S9 -3.7490E-02 2.1029E-01 -9.2601E-01 2.0421E + 00 -2.6662E + 00 2.1243E + 00 -1.0131E + 00 2.6489E-01 -2.9004E-02 S10 -2.9440E-02 9.8546E-02 -5.1575E-01 9.9389E-01 -1.0766E + 00 7.1183E-01 -2.8742E-01 6.5836E-02 -6.5795E-03 S11 1.0220E-01 -6.1945E-02 -1.1699E-01 2.5022E-01 -2.5217E-01 1.5126E-01 -5.4798E-02 1.0995E-02 -9.2837E-04 S12 -8.7056E-02 1.8106E-01 -2.3864E-01 1.8228E-01 -9.0810E-02 2.9493E-02 -5.9759E-03 6.8389E-04 -3.3689E-05 S13 -4.0470E-02 -7.0776E-02 1.0331E-01 -9.8002E-02 5.3603E-02 -1.7038E-02 3.1707E-03 -3.2344E-04 1.4037E-05 S14 -1.0082E-01 2.1127E-02 6.1200E-03 -1.4448E-02 8.1488E-03 -2.2912E-03 3.5514E-04 -2.9064E-05 9.8213E-07 S15 -4.2567E-01 2.0154E-01 -4.0682E-02 -3.9792E-03 4.1403E-03 -9.8704E-04 1.1795E-04 -7.2388E-06 1.8156E-07 S16 -3.4804E-01 2.2707E-01 -1.0811E-01 3.6925E-02 -8.6293E-03 1.3142E-03 -1.2317E-04 6.4122E-06 -1.4139E-07

Table 11

TTL (mm) 5.40 f4 (mm) -7.79 ImgH (mm) 3.70 f5 (mm) -3057.68 f (mm) 4.26 f6 (mm) 55.46 f1 (mm) 8.46 f7 (mm) 1276.36 f2 (mm) 6.39 f8 (mm) -14.84 f3 (mm) 26.36 Zh Zh

Table 12

FIG. 8A shows an on-axis chromatic aberration curve of the imaging lens of Example 4, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens. FIG. 8B shows the astigmatism curve of the imaging lens of Example 4, which represents a meridional image plane curvature and a sagittal image plane curvature. FIG. 8C shows the distortion curve of the imaging lens of Example 4, which represents the value of the distortion magnitude corresponding to different image heights. FIG. 8D shows a magnification chromatic aberration curve of the imaging lens of Example 4, which represents deviations of different image heights on the imaging plane after light passes through the lens. FIG. 8E shows the contrast degree curve of the imaging lens of Example 4, which represents the contrast degree corresponding to different image heights on the imaging surface. 8A to 8E, it can be known that the imaging lens provided in Embodiment 4 can achieve good imaging quality.

Example 5

An imaging lens according to Embodiment 5 of the present application is described below with reference to FIGS. 9 to 10E. FIG. 9 is a schematic structural diagram of an imaging lens according to Embodiment 5 of the present application.

As shown in FIG. 9, the imaging lens according to the exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, an aperture STO, and a fourth lens. The lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the filter L9, and the imaging surface S19.

The first lens L1 has a positive refractive power, and an object side surface S1 thereof is a convex surface, and an image side surface S2 is a concave surface. The second lens L2 has a positive power, and the object side surface S3 is a convex surface, and the image side surface S4 is a convex surface. The third lens L3 has a positive power, and the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface. The fourth lens L4 has a negative power, and the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface. The fifth lens L5 has a positive power, and the object side surface S9 is a concave surface, and the image side surface S10 is a convex surface. The sixth lens L6 has a positive power, and the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The seventh lens L7 has a negative power, and the object side surface S13 is a convex surface, and the image side surface S14 is a concave surface. The eighth lens L8 has a positive power, and the object side surface S15 is a convex surface and the image side surface S16 is a concave surface. The filter L9 has an object side surface S17 and an image side surface S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.

Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 5, where the units of the radius of curvature and thickness are millimeters (mm). Table 14 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 5, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above. Table 15 shows the total optical length TTL of the camera lens in Example 5, the half of the diagonal length of the effective pixel area of the electronic light sensor element of the camera lens, ImgH, the total effective focal length f of the camera lens, and the effective focal lengths f1 to f8 of each lens .

Table 13

Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 3.0132E-02 1.1697E-01 -5.2335E-01 9.7477E-01 -1.0920E + 00 7.5272E-01 -3.1070E-01 7.0531E-02 -6.7848E-03 S2 -1.5913E-02 -5.8419E-02 -1.7539E-01 6.0654E-01 -8.2658E-01 6.5145E-01 -3.0681E-01 7.9964E-02 -8.8670E-03 S3 -2.8327E-02 5.4631E-02 -5.4823E-01 1.4216E + 00 -1.8739E + 00 1.4847E + 00 -7.1385E-01 1.9128E-01 -2.1836E-02 S4 1.5931E-02 -3.5842E-02 -3.0188E-02 2.4573E-01 -4.8074E-01 5.0121E-01 -2.9934E-01 9.6190E-02 -1.2856E-02 S5 -1.2950E-02 6.0660E-02 -6.8628E-02 -9.5543E-02 3.2202E-01 -3.6189E-01 2.1186E-01 -6.4668E-02 8.1255E-03 S6 -1.3678E-01 7.8991E-01 -2.5898E + 00 4.9009E + 00 -5.7651E + 00 4.2837E + 00 -1.9544E + 00 4.9956E-01 -5.4769E-02 S7 -1.6879E-01 7.7881E-01 -2.6168E + 00 5.1690E + 00 -6.2718E + 00 4.7635E + 00 -2.2052E + 00 5.6820E-01 -6.2300E-02 S8 -7.8321E-02 1.5230E-01 -5.5230E-01 1.3759E + 00 -2.2272E + 00 2.4108E + 00 -1.6797E + 00 6.7547E-01 -1.1780E-01 S9 -5.1780E-02 3.9304E-01 -1.7421E + 00 4.0539E + 00 -5.6713E + 00 4.9079E + 00 -2.5785E + 00 7.5509E-01 -9.4622E-02 S10 -5.4434E-02 1.8177E-01 -6.8864E-01 1.2866E + 00 -1.4511E + 00 1.0305E + 00 -4.5287E-01 1.1296E-01 -1.2203E-02 S11 1.0174E-01 -6.7171E-02 -1.0874E-01 2.4996E-01 -2.6029E-01 1.5875E-01 -5.7882E-02 1.1622E-02 -9.7938E-04 S12 -5.4327E-02 1.0412E-01 -1.4540E-01 1.1366E-01 -5.9030E-02 2.0253E-02 -4.3471E-03 5.2552E-04 -2.7200E-05 S13 -1.3244E-02 -1.1536E-01 1.5714E-01 -1.4543E-01 8.0407E-02 -2.6320E-02 5.0794E-03 -5.3757E-04 2.4127E-05 S14 -1.4977E-01 7.6681E-02 -3.4525E-02 4.3979E-03 2.5729E-03 -1.2410E-03 2.3246E-04 -2.0890E-05 7.4203E-07 S15 -4.7162E-01 2.6447E-01 -8.9760E-02 1.8919E-02 -2.4312E-03 1.7975E-04 -6.8262E-06 1.2170E-07 -2.3616E-09 S16 -3.1516E-01 1.9314E-01 -8.7811E-02 2.9148E-02 -6.7042E-03 1.0114E-03 -9.4208E-05 4.8857E-06 -1.0764E-07

Table 14

TTL (mm) 5.40 f4 (mm) -7.90 ImgH (mm) 3.70 f5 (mm) 311.81 f (mm) 4.17 f6 (mm) 27.92 f1 (mm) 8.44 f7 (mm) -14.36 f2 (mm) 6.39 f8 (mm) 764.14 f3 (mm) 27.80 Zh Zh

Table 15

FIG. 10A shows an on-axis chromatic aberration curve of the imaging lens of Example 5, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens. FIG. 10B shows the astigmatism curve of the imaging lens of Example 5, which represents a meridional image plane curvature and a sagittal image plane curvature. FIG. 10C shows a distortion curve of the imaging lens of Example 5, which represents the magnitude of distortion corresponding to different image heights. FIG. 10D shows a magnification chromatic aberration curve of the imaging lens of Example 5, which represents deviations of different image heights on the imaging plane after light passes through the lens. FIG. 10E shows the contrast degree curve of the imaging lens of Example 5, which represents the contrast degree corresponding to different image heights on the imaging surface. As can be seen from FIGS. 10A to 10E, the imaging lens provided in Embodiment 5 can achieve good imaging quality.

Example 6

An imaging lens according to Embodiment 6 of the present application is described below with reference to FIGS. 11 to 12E. FIG. 11 is a schematic structural diagram of an imaging lens according to Embodiment 6 of the present application.

As shown in FIG. 11, the imaging lens according to the exemplary embodiment of the present application includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, an aperture STO, and a fourth lens. The lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the filter L9, and the imaging surface S19.

The first lens L1 has a positive refractive power, and an object side surface S1 thereof is a convex surface, and an image side surface S2 is a concave surface. The second lens L2 has a positive power, and the object side surface S3 is a convex surface, and the image side surface S4 is a convex surface. The third lens L3 has a positive power, and the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface. The fourth lens L4 has a negative power, and the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface. The fifth lens L5 has a positive power, and the object side surface S9 is a convex surface, and the image side surface S10 is a convex surface. The sixth lens L6 has a positive power, and the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The seventh lens L7 has a negative power, and the object side surface S13 is a convex surface, and the image side surface S14 is a concave surface. The eighth lens L8 has a negative power, and the object side surface S15 is a convex surface, and the image side surface S16 is a concave surface. The filter L9 has an object side surface S17 and an image side surface S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.

Table 16 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 6, where the units of the radius of curvature and thickness are both millimeters (mm). Table 17 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 6, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above. Table 18 shows the total optical length TTL of the camera lens in Example 6, half the diagonal length of the effective pixel area of the electronic light sensor element of the camera lens, ImgH, the total effective focal length f of the camera lens, and the effective focal lengths f1 to f8 of each lens. .

Table 16

Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 5.0230E-02 -1.8396E-03 -1.7820E-01 3.7949E-01 -4.5629E-01 3.3077E-01 -1.4179E-01 3.3267E-02 -3.3090E-03 S2 -2.2155E-03 -1.3767E-01 2.1146E-02 3.2218E-01 -5.5862E-01 4.8571E-01 -2.4400E-01 6.7362E-02 -7.9176E-03

S3 -1.1956E-02 -2.5918E-02 -3.8894E-01 1.3057E + 00 -1.9247E + 00 1.6437E + 00 -8.4126E-01 2.3968E-01 -2.9213E-02 S4 4.0654E-02 -2.3448E-01 7.3986E-01 -1.4429E + 00 1.7624E + 00 -1.3537E + 00 6.3690E-01 -1.6777E-01 1.8966E-02 S5 -6.6448E-03 -1.5646E-02 3.0892E-01 -1.0407E + 00 1.6525E + 00 -1.4784E + 00 7.7538E-01 -2.2519E-01 2.8231E-02 S6 -1.7106E-01 1.0781E + 00 -3.6875E + 00 7.3278E + 00 -9.1442E + 00 7.2975E + 00 -3.6225E + 00 1.0195E + 00 -1.2424E-01 S7 -2.1036E-01 1.1957E + 00 -4.6597E + 00 1.1040E + 01 -1.6768E + 01 1.6597E + 01 -1.0389E + 01 3.7375E + 00 -5.8843E-01 S8 -7.3241E-02 1.9066E-02 2.7466E-01 -1.3418E + 00 3.0804E + 00 -3.9095E + 00 2.8092E + 00 -1.0663E + 00 1.6564E-01 S9 -2.8396E-02 1.3062E-01 -6.0765E-01 1.3873E + 00 -1.9212E + 00 1.6621E + 00 -8.8318E-01 2.6467E-01 -3.4211E-02 S10 -4.8926E-02 1.0614E-01 -4.0138E-01 7.3148E-01 -8.1064E-01 5.7158E-01 -2.5240E-01 6.3981E-02 -7.0694E-03 S11 1.1431E-01 -1.2778E-01 1.8479E-02 9.7610E-02 -1.4732E-01 1.0562E-01 -4.2398E-02 9.0647E-03 -7.9628E-04 S12 -5.3812E-02 9.0258E-02 -1.1412E-01 8.0343E-02 -3.8539E-02 1.2700E-02 -2.7097E-03 3.3350E-04 -1.7815E-05 S13 -1.3812E-02 -1.2700E-01 1.7951E-01 -1.6492E-01 9.0400E-02 -2.9538E-02 5.7162E-03 -6.0790E-04 2.7431E-05 S14 -1.3843E-01 5.8853E-02 -1.6764E-02 -6.5591E-03 6.8988E-03 -2.3259E-03 3.9843E-04 -3.4944E-05 1.2457E-06 S15 -4.6385E-01 2.5128E-01 -7.7622E-02 1.2568E-02 -3.9495E-04 -2.2720E-04 4.2313E-05 -3.1407E-06 8.8737E-08 S16 -3.3850E-01 2.2127E-01 -1.0683E-01 3.7210E-02 -8.8982E-03 1.3920E-03 -1.3474E-04 7.2907E-06 -1.6832E-07

Table 17

TTL (mm) 5.40 f4 (mm) -7.94 ImgH (mm) 3.70 f5 (mm) 427.81 f (mm) 4.30 f6 (mm) 28.03 f1 (mm) 8.52 f7 (mm) -16.19 f2 (mm) 6.36 f8 (mm) -31.60 f3 (mm) 28.23 Zh Zh

Table 18

FIG. 12A shows an on-axis chromatic aberration curve of the imaging lens of Example 6, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens. FIG. 12B shows the astigmatism curve of the imaging lens of Example 6, which represents a meridional image plane curvature and a sagittal image plane curvature. FIG. 12C shows the distortion curve of the imaging lens of Example 6, which represents the magnitude of distortion corresponding to different image heights. FIG. 12D shows a magnification chromatic aberration curve of the imaging lens of Example 6, which represents deviations of different image heights on the imaging plane after light passes through the lens. FIG. 12E shows the contrast degree curve of the imaging lens of Example 6, which represents the contrast degree corresponding to different image heights on the imaging surface. 12A to 12E, it can be known that the imaging lens provided in Embodiment 6 can achieve good imaging quality.

Example 7

An imaging lens according to Embodiment 7 of the present application is described below with reference to FIGS. 13 to 14E. FIG. 13 is a schematic structural diagram of an imaging lens according to Embodiment 7 of the present application.

As shown in FIG. 13, the imaging lens according to the exemplary embodiment of the present application includes: a first lens L1, a second lens L2, a third lens L3, an aperture STO, and a fourth The lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the filter L9, and the imaging surface S19.

The first lens L1 has a positive refractive power, and an object side surface S1 thereof is a convex surface, and an image side surface S2 is a concave surface. The second lens L2 has a positive power, and the object side surface S3 is a convex surface, and the image side surface S4 is a convex surface. The third lens L3 has a positive power, and the object side surface S5 is a concave surface, and the image side surface S6 is a convex surface. The fourth lens L4 has a negative power, and the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface. The fifth lens L5 has a negative power, and the object side surface S9 is a concave surface, and the image side surface S10 is a concave surface. The sixth lens L6 has a positive power, and the object side surface S11 is a convex surface, and the image side surface S12 is a concave surface. The seventh lens L7 has a negative power, and the object side surface S13 is a convex surface, and the image side surface S14 is a concave surface. The eighth lens L8 has a negative power, and the object side surface S15 is a convex surface, and the image side surface S16 is a concave surface. The filter L9 has an object side surface S17 and an image side surface S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.

Table 19 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 7, where the units of the radius of curvature and thickness are millimeters (mm). Table 20 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 7, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above. Table 21 shows the total optical length TTL of the camera lens in Example 7, half the diagonal length of the effective pixel area of the electronic light sensor element of the camera lens, ImgH, the total effective focal length f of the camera lens, and the effective focal lengths f1 to f8 of each lens .

Table 19

Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 4.8972E-02 1.3476E-03 -1.7102E-01 3.3127E-01 -3.5961E-01 2.3254E-01 -8.7177E-02 1.7433E-02 -1.4354E-03 S2 -6.8501E-03 -9.7884E-02 -1.6260E-01 7.6402E-01 -1.1500E + 00 9.4557E-01 -4.5022E-01 1.1667E-01 -1.2765E-02 S3 -1.3965E-02 1.5232E-02 -6.6079E-01 2.0937E + 00 -3.1358E + 00 2.7061E + 00 -1.3756E + 00 3.8303E-01 -4.5122E-02 S4 4.4401E-02 -2.5900E-01 6.7007E-01 -8.0077E-01 2.2655E-01 4.2843E-01 -4.6358E-01 1.7771E-01 -2.4073E-02 S5 -2.1115E-03 -6.5747E-02 4.0861E-01 -8.5934E-01 7.6475E-01 -1.9960E-01 -1.1120E-01 7.4246E-02 -1.0780E-02 S6 -1.9032E-01 1.2482E + 00 -4.4081E + 00 9.1514E + 00 -1.2045E + 01 1.0204E + 01 -5.3919E + 00 1.6149E + 00 -2.0883E-01 S7 -2.1102E-01 1.1912E + 00 -4.4339E + 00 9.7341E + 00 -1.3296E + 01 1.1509E + 01 -6.1518E + 00 1.8582E + 00 -2.4357E-01 S8 -6.4582E-02 -8.3919E-02 9.9668E-01 -4.1852E + 00 9.6611E + 00 -1.3072E + 01 1.0349E + 01 -4.4425E + 00 7.9930E-01 S9 -2.2826E-02 9.8577E-02 -5.0936E-01 1.2007E + 00 -1.6849E + 00 1.4594E + 00 -7.6981E-01 2.2772E-01 -2.8988E-02 S10 -4.7581E-02 8.9371E-02 -3.5280E-01 6.4386E-01 -7.0246E-01 4.8303E-01 -2.0741E-01 5.1338E-02 -5.5833E-03 S11 1.1865E-01 -1.4372E-01 5.0855E-02 5.8343E-02 -1.1771E-01 9.1838E-02 -3.8655E-02 8.5410E-03 -7.6894E-04 S12 -5.7954E-02 9.7736E-02 -1.2094E-01 8.4492E-02 -4.0320E-02 1.3217E-02 -2.8008E-03 3.4176E-04 -1.8081E-05 S13 -1.3696E-02 -1.2510E-01 1.7314E-01 -1.5616E-01 8.4179E-02 -2.7064E-02 5.1593E-03 -5.4144E-04 2.4161E-05 S14 -1.3727E-01 5.6237E-02 -1.5150E-02 -6.6821E-03 6.6187E-03 -2.1911E-03 3.7082E-04 -3.2207E-05 1.1383E-06 S15 -4.6156E-01 2.4562E-01 -7.3786E-02 1.1157E-02 -7.7746E-05 -2.7058E-04 4.5678E-05 -3.2669E-06 9.0148E-08 S16 -3.3574E-01 2.1718E-01 -1.0344E-01 3.5457E-02 -8.3373E-03 1.2820E-03 -1.2190E-04 6.4739E-06 -1.4655E-07

Table 20

TTL (mm) 5.41 f4 (mm) -8.09 ImgH (mm) 3.70 f5 (mm) -306.28 f (mm) 4.30 f6 (mm) 25.69 f1 (mm) 8.51 f7 (mm) -16.70 f2 (mm) 6.38 f8 (mm) -34.17 f3 (mm) 29.56 Zh Zh

Table 21

FIG. 14A shows an on-axis chromatic aberration curve of the imaging lens of Example 7, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens. FIG. 14B shows the astigmatism curve of the imaging lens of Example 7, which represents a meridional image plane curvature and a sagittal image plane curvature. FIG. 14C shows the distortion curve of the imaging lens of Example 7, which represents the value of the distortion magnitude corresponding to different image heights. FIG. 14D shows the magnification chromatic aberration curve of the imaging lens of Example 7, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. FIG. 14E shows a contrast degree curve of the imaging lens of Example 7, which represents the contrast degree corresponding to different image heights on the imaging surface. As can be seen from FIGS. 14A to 14E, the imaging lens provided in Embodiment 7 can achieve good imaging quality.

In summary, Examples 1 to 7 satisfy the relationships shown in Table 22, respectively.

Table 22

The present application also provides an imaging device, whose electronic photosensitive element may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be an independent 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 imaging lens described above.

The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solution of the specific combination of the above technical features, but also covers the above technical features without departing from the inventive concept. Or other equivalent solutions formed by any combination of features. For example, a technical solution formed by replacing the above features with technical features disclosed in the present application (but not limited to) having similar functions.

Claims (33)

The imaging lens includes the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens in this order from the object side to the image side along the optical axis. Lies in The first lens has positive power, and an object side of the first lens is convex; The second lens has optical power, and an image side thereof is convex; The third lens has a power; The fourth lens has an optical power; The fifth lens has a power; The sixth lens has a power; The seventh lens has a power; The eighth lens has optical power, the object side is convex, and the image side is concave; and The distance TTL from the object side of the first lens to the imaging surface of the camera lens on the optical axis and half the diagonal length of the effective pixel area of the electronic light sensor element of the camera lens ImgH satisfies TTL / ImgH < 1.65. The imaging lens according to claim 1, wherein a total effective focal length f of the imaging lens and an entrance pupil diameter EPD of the imaging lens satisfy f / EPD <1.9. The imaging lens according to claim 1, wherein a total effective focal length f of the imaging lens and an effective focal length f1 of the first lens satisfy f / f1 <0.7. The imaging lens according to claim 3, wherein the second lens has a positive power, and an effective focal length f1 of the first lens and an effective focal length f2 of the second lens satisfy 1 <f1 / f2 <1.5. The imaging lens according to claim 1, wherein the third lens has a positive power, and a curvature radius R6 of an image side of the third lens and an effective focal length f3 of the third lens satisfy -0.6. <R6 / f3 <0. The imaging lens according to claim 1, wherein the curvature radius R15 of the object side of the eighth lens and the curvature radius R16 of the image side of the eighth lens satisfy 1 <R15 / R16 <1.5. The imaging lens according to claim 1, wherein the effective radius DT11 of the object side of the first lens and the effective radius DT82 of the image side of the eighth lens satisfy 0.3 <DT11 / DT82 <0.8. The imaging lens according to claim 1, wherein the effective radius DT11 of the object side of the first lens and the effective radius DT52 of the image side of the fifth lens satisfy 0.9 <DT11 / DT52 <1.3. The imaging lens according to claim 1, wherein an on-axis distance SAG42 between the intersection of the image side of the fourth lens and the optical axis and the vertex of the effective radius of the image side of the fourth lens is between the SAG42 and the The center thickness CT4 of the fourth lens on the optical axis satisfies 0.7 <SAG42 / CT4 <1.3. The imaging lens according to claim 1, wherein an object side surface of the sixth lens is convex, and an image side surface is concave. The imaging lens according to claim 10, wherein an on-axis distance SAG62 from the intersection of the image side of the sixth lens and the optical axis to the effective radius vertex of the image side of the sixth lens is between the SAG62 and the The center thickness CT6 of the sixth lens on the optical axis satisfies -0.5 <SAG62 / CT6 <0. The imaging lens according to claim 11, wherein the vertical distance YC62 from the critical point of the image side of the sixth lens to the optical axis and the effective radius DT62 of the image side of the sixth lens satisfy 0.4 <YC62 / DT62 <0.9. The imaging lens according to claim 1, wherein the curvature radius R11 of the object side of the sixth lens and the curvature radius R12 of the image side of the sixth lens satisfy 0 <| (R11-R12) / ( R11 + R12) | <0.3. The imaging lens according to claim 1, wherein the curvature radius R11 of the object side of the sixth lens and the curvature radius R14 of the image side of the seventh lens satisfy 0.7 <R11 / R14 <1.2. The imaging lens according to any one of claims 1 to 14, wherein an interval distance T34 between the third lens and the fourth lens on the optical axis, and the fourth lens and the fourth lens An interval distance T45 of the fifth lens on the optical axis satisfies 0 <T34 × 10 / T45 <0.5. The imaging lens according to any one of claims 1 to 14, wherein a center thickness of the fifth lens on the optical axis CT5 and a center thickness of the sixth lens on the optical axis CT6, the center thickness CT7 of the seventh lens on the optical axis and the center thickness CT8 of the eighth lens on the optical axis satisfy 0.5 <(CT5 + CT6) / (CT7 + CT8) <1. The imaging lens according to any one of claims 1 to 14, wherein the sum of the edge thicknesses of the first lens to the eighth lens in a direction parallel to the optical axis, ΣET, and The sum ΣCT of the center thicknesses of the first lens to the eighth lens on the optical axis satisfies 0.6 <ΣET / ΣCT ≦ 1. The imaging lens includes the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens in this order from the object side to the image side along the optical axis. Lies in The first lens has positive power, and an object side of the first lens is convex; The second lens has a positive power, and an image side thereof is convex; The third lens has a power; The fourth lens has an optical power; The fifth lens has a power; The sixth lens has a power; The seventh lens has a power; The eighth lens has optical power, the object side is convex, and the image side is concave; and The effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy 1 <f1 / f2 <1.5. The imaging lens according to claim 18, wherein a total effective focal length f of the imaging lens and an entrance pupil diameter EPD of the imaging lens satisfy f / EPD <1.9. The imaging lens according to claim 18, wherein the distance TTL on the optical axis from the object side of the first lens to the imaging surface of the imaging lens is effective with the electronic optical sensor of the imaging lens The half of the diagonal length of the pixel region ImgH satisfies TTL / ImgH <1.65. The imaging lens according to claim 18, wherein a total effective focal length f of the imaging lens and an effective focal length f1 of the first lens satisfy f / f1 <0.7. The imaging lens according to claim 18, wherein the third lens has a positive power, and a curvature radius R6 of an image side of the third lens and an effective focal length f3 of the third lens satisfy -0.6. <R6 / f3 <0. The imaging lens according to claim 18, wherein a separation distance T34 between the third lens and the fourth lens on the optical axis, and the fourth lens and the fifth lens are between the fourth lens and the fifth lens. The separation distance T45 on the optical axis satisfies 0 <T34 × 10 / T45 <0.5. The imaging lens according to claim 18, wherein a center thickness CT5 of the fifth lens on the optical axis, a center thickness CT6 of the sixth lens on the optical axis, and the seventh The center thickness CT7 of the lens on the optical axis and the center thickness CT8 of the eighth lens on the optical axis satisfy 0.5 <(CT5 + CT6) / (CT7 + CT8) <1. The imaging lens according to claim 18, wherein the sum of the edge thicknesses of the first lens to the eighth lens in a direction parallel to the optical axis ΣET and the first lens to the The sum of the center thicknesses of the eighth lens on the optical axis ΣCT satisfies 0.6 <ΣET / ΣCT ≦ 1. The imaging lens according to any one of claims 18 to 25, wherein a curvature radius R15 of an object side of the eighth lens and a curvature radius R16 of an image side of the eighth lens satisfy 1 <R15 / R16 <1.5. The imaging lens according to any one of claims 18 to 25, wherein the effective radius DT11 of the object side of the first lens and the effective radius DT82 of the image side of the eighth lens satisfy 0.3 <DT11 / DT82 <0.8. The imaging lens according to any one of claims 18 to 25, wherein the effective radius DT11 of the object side of the first lens and the effective radius DT52 of the image side of the fifth lens satisfy 0.9 <DT11 / DT52 <1.3. The imaging lens according to any one of claims 18 to 25, wherein an axis between an intersection point of the fourth lens image side surface and the optical axis to an effective radius vertex of the fourth lens image side surface The upper distance SAG42 and the center thickness CT4 of the fourth lens on the optical axis satisfy 0.7 <SAG42 / CT4 <1.3. The imaging lens according to any one of claims 18 to 25, wherein an axis between an intersection point of the sixth lens image side surface and the optical axis to an effective radius vertex of the sixth lens image side surface The upper distance SAG62 and the center thickness CT6 of the sixth lens on the optical axis satisfy -0.5 <SAG62 / CT6 <0. The imaging lens according to any one of claims 18 to 25, wherein the vertical distance YC62 from the critical point of the image side of the sixth lens to the optical axis and the effective radius of the image side of the sixth lens DT62 satisfies 0.4 <YC62 / DT62 <0.9. The imaging lens according to any one of claims 18 to 25, wherein a curvature radius R11 of an object side of the sixth lens and a curvature radius R12 of an image side of the sixth lens satisfy 0 <| ( R11-R12) / (R11 + R12) | <0.3. The imaging lens according to any one of claims 18 to 25, wherein a curvature radius R11 of the object side of the sixth lens and a curvature radius R14 of the image side of the seventh lens satisfy 0.7 <R11 / R14 <1.2.

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