WO2020024632A1 - Imaging lens assembly - Google Patents

Abstract

An imaging lens assembly. The lens assembly comprises, in order along the optical axis from an object side to an image side: a first lens (E1), a second lens (E2), a third lens (E3), a fourth lens (E4) and a fifth lens (E5). The first lens (E1) has a positive focal power, and an object-side surface (S1) thereof is a convex surface. The second lens (E2) has a focal power, and an image-side surface (S4) thereof is a convex surface. The third lens (E3) has a positive focal power, and an image-side surface (S6) thereof is a convex surface. The fourth lens (E4) has a focal power. The fifth lens (E5) has a focal power, and an object-side surface (S9) thereof is a concave surface. An air gap is arranged between any two adjacent lenses among the first lens (E1) through the fifth lens (E5). An effective focal length of the first lens (E1) f1, an effective focal length of the third lens (E3) f3 and a total effective focal length of the imaging lens assembly f satisfy 0 < (f1+f3)/f < 2.5.

Description

Imaging lens

Cross-reference to related applications

This application claims the priority and rights of a Chinese patent application filed with the Chinese National Intellectual Property Office (CNIPA) with a patent application number of 201810864104.5 on August 01, 2018, which is incorporated herein by reference in its entirety.

Technical field

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

Background technique

In recent years, with the trend of thinner and lighter portable electronic products, the requirements for the miniaturization of matching imaging lenses have been increasing. In addition, the photosensitive elements of general imaging lenses are mainly photosensitive coupling elements (CCD) or complementary metal oxide semiconductor devices (CMOS). With the advancement of semiconductor manufacturing technology, the number of pixels of a photosensitive element increases and the pixel size decreases. . The reduction in pixel size means that the amount of light passing through the lens will decrease during the same exposure time. This puts forward higher requirements on the aperture number of the imaging lens to be used, and the lens needs to have a large aperture number to meet the imaging requirements in the case of insufficient light (such as rainy days, dusk, etc.).

Summary of the invention

The present application provides an imaging lens that is applicable to portable electronic products and can at least solve or partially solve at least one of the above disadvantages in the prior art.

In one aspect, the present application provides an imaging lens that includes, 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, and a fifth lens. The first lens may have positive power and its object side may be convex; the second lens may have power and its image side may be convex; the third lens may have positive power and its image side may be convex; the fourth lens It has optical power; the fifth lens has optical power, and its object side may be concave; among the first lens to the fifth lens, any adjacent two lenses may have an air gap.

In one embodiment, the effective focal length f1 of the first lens, the effective focal length f3 of the third lens, and the total effective focal length f of the imaging lens may satisfy 0 <(f1 + f3) / f <2.5.

In one embodiment, the maximum effective half-aperture DT41 of the object side of the fourth lens and the maximum effective half-aperture DT42 of the image side of the fourth lens may satisfy 0.5 <DT41 / DT42 <1.5.

In one embodiment, the curvature radius R9 of the object side of the fifth lens and the total effective focal length f of the imaging lens may satisfy -1 <R9 / f <0.

In one embodiment, the image side of the first lens may be concave; the curvature radius R1 of the object side of the first lens and the curvature radius R2 of the image side of the first lens may satisfy 0 <| R1 / R2 | <0.5.

In one embodiment, the curvature radius R6 of the image side of the third lens and the curvature radius R4 of the image side of the second lens may satisfy 0 <R6 / R4 <1.

In one embodiment, the center thickness CT1 of the first lens on the optical axis and the center thickness CT4 of the fourth lens on the optical axis may satisfy 0 <CT4 / CT1 <0.4.

In one embodiment, the separation distance T12 on the optical axis of the first lens and the second lens and the separation distance T34 on the optical axis of the third lens and the fourth lens may satisfy 0 <T34 / T12 <0.5.

In one embodiment, the effective focal length f1 of the first lens and the total effective focal length f of the imaging lens may satisfy 0.5 ≦ | f / f1 | ≦ 1.5.

In one embodiment, the total effective focal length f of the imaging lens and the entrance pupil diameter EPD of the imaging lens may satisfy f / EPD <2.

In one embodiment, the distance TTL on the optical axis from the object side of the first lens to the imaging surface of the imaging lens on the optical axis and half the diagonal length of the effective pixel area ImgH on the imaging surface of the imaging lens may satisfy TTL / ImgH <1.6.

In one embodiment, the sum of the center thicknesses of the first lens to the fifth lens on the optical axis ΣCT and the distance TTL on the optical axis from the object side of the first lens to the imaging surface of the imaging lens may satisfy 0 <Σ CT / TTL <0.6.

In one embodiment, the sum of the separation distance on the optical axis of any two adjacent lenses from the first lens to the fifth lens ΣAT and the distance TTL on the optical axis from the object side of the first lens to the imaging surface of the imaging lens It can satisfy 0 <ΣAT / TTL <0.5.

In one embodiment, the fifth lens may have a negative power.

This application uses five lenses. By reasonably distributing the power, surface shape, center thickness of each lens, and the axial distance between each lens, the above imaging lenses have ultra-thin, large aperture, and excellent imaging. Quality etc. at least one beneficial effect.

BRIEF DESCRIPTION OF THE DRAWINGS

With reference to the 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:

FIG. 1 shows a schematic structural diagram of an imaging lens according to Embodiment 1 of the present application; FIGS. 2A to 2D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 1;

3 shows a schematic structural diagram of an imaging lens according to Embodiment 2 of the present application; and FIGS. 4A to 4D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 2;

5 shows a schematic structural diagram of an imaging lens according to Embodiment 3 of the present application; and FIGS. 6A to 6D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 3;

7 shows a schematic structural diagram of an imaging lens according to Embodiment 4 of the present application; FIGS. 8A to 8D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 4, respectively;

FIG. 9 shows a schematic structural diagram of an imaging lens according to Embodiment 5 of the present application; FIGS. 10A to 10D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 5;

FIG. 11 shows a schematic structural diagram of an imaging lens according to Embodiment 6 of the present application; FIGS. 12A to 12D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 6, respectively;

13 shows a schematic structural diagram of an imaging lens according to Embodiment 7 of the present application; and FIGS. 14A to 14D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 7;

15 shows a schematic structural diagram of an imaging lens according to Embodiment 8 of the present application; FIGS. 16A to 16D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 8;

FIG. 17 shows a schematic structural diagram of an imaging lens according to Embodiment 9 of the present application; FIGS. 18A to 18D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the imaging lens of Embodiment 9.

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 of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging plane 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 an embodiment 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.

An optical imaging lens according to an exemplary embodiment of the present application may include, for example, five lenses having optical power, that is, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. These five lenses are sequentially arranged along the optical axis from the object side to the image side, and each adjacent lens may have an air gap.

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 convex; the third lens may have a positive power Degrees, the image side may be convex; the fourth lens has positive or negative power; the fifth lens has positive or negative power, and the object side may be concave.

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

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

In an exemplary embodiment, the fifth lens may have a negative power.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression f / EPD <2, 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 1.88 ≦ f / EPD ≦ 1.90. The ratio of the total effective focal length of the imaging system to the entrance pupil diameter is the system's image-side aperture number Fno, which satisfies the conditional expression f / EPD <2, which is equivalent to ensuring that the system has a larger aperture.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression 0 <(f1 + f3) / f <2.5, where f1 is the effective focal length of the first lens, f3 is the effective focal length of the third lens, and f is The total effective focal length of the imaging lens. More specifically, f1, f3, and f can further satisfy 1.60 ≦ (f1 + f3) /f≦1.88. Reasonably distribute the power of the system and make the first lens and the third lens have positive power to achieve the function of converging light, and avoid problems such as divergence of light that easily occurs when the light beam passes through a large aperture.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression −1 <R9 / f <0, where f is the total effective focal length of the imaging lens and R9 is the radius of curvature of the object side of the fifth lens. More specifically, f and R9 can further satisfy -0.6≤R9 / f≤-0.1, for example, -0.44≤R9 / f≤-0.22. The fifth lens can play a part of the system's optical power and correct the light. Based on this, a reasonable control of the curvature radius of the object side of the fifth lens will help the optical system to meet the requirements of the sensor chip for the main light angle.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional TTL / ImgH <1.6, 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 Half of the diagonal of the effective pixel area on the imaging surface. More specifically, TTL and ImgH can further satisfy 1.3 ≦ TTL / ImgH ≦ 1.5, for example, TTL / ImgH = 1.40. Meet the conditional TTL / ImgH <1.6, which is conducive to the ultra-thin characteristics of imaging lenses.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression 0 <| R1 / R2 | <0.5, where R1 is the curvature radius of the object side of the first lens and R2 is the curvature of the image side of the first lens radius. More specifically, R1 and R2 can further satisfy 0 <| R1 / R2 | ≦ 0.39. Reasonably control the lens shape of the first lens so that it is shaped into a meniscus that is curved toward the diaphragm (that is, the side of the object is convex and the side of the image is concave). This arrangement is beneficial to the first lens while bearing positive power Correct astigmatism in the meridional direction and on-axis spherical aberration.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression 0.5 <DT41 / DT42 <1.5, where DT41 is the maximum effective half-diameter of the object side of the fourth lens and DT42 is the maximum of the image side of the fourth lens Effective half-caliber. More specifically, DT41 and DT42 can further satisfy 0.8 ≦ DT41 / DT42 ≦ 1.2, for example, 0.92 ≦ DT41 / DT42 ≦ 0.95. Reasonably control the shape of the fourth lens, so that the maximum effective half-aperture of the object side and the image side of the fourth lens are close, which is beneficial to reduce the bearing gap between the two sides of the lens during the lens assembly process and improve the assembly stability. .

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression 0 <R6 / R4 <1, where R4 is the radius of curvature of the image side of the second lens and R6 is the radius of curvature of the image side of the third lens. More specifically, R4 and R6 can further satisfy 0 <R6 / R4 ≦ 0.6, for example, 0.11 ≦ R6 / R4 ≦ 0.42. Reasonably control the range of the radius of curvature of the image side of the second lens and the image side of the third lens, so that the position of the ghost image generated by the even reflection of the two surfaces is moved outside the imaging effective surface to reduce the risk of ghost image generation.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression 0 <CT4 / CT1 <0.4, where CT1 is the center thickness of the first lens on the optical axis, and CT4 is the center of the fourth lens on the optical axis. thickness. More specifically, CT1 and CT4 can further satisfy 0.23 ≦ CT4 / CT1 ≦ 0.31. Reasonably controlling the center thickness of the first lens and the fourth lens is conducive to correcting the astigmatism in the Pittsval field curvature and arc misalignment direction.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression 0 <T34 / T12 <0.5, where T12 is the distance between the first lens and the second lens on the optical axis, and T34 is the third lens and the first lens. The distance between the four lenses on the optical axis. More specifically, T12 and T34 can further satisfy 0.03 ≦ T34 / T12 ≦ 0.21. A sufficient air gap must be ensured between the first lens and the second lens to place the diaphragm. The air gap between the third lens and the fourth lens can be as small as possible in order to ensure the feasibility of assembly, so as to shorten the total optical length of the imaging lens. Reasonably controlling the ratio of T12 to T34 will help reduce the spherical aberration on the shaft.

In an exemplary embodiment, the imaging lens of the present application can satisfy the conditional expression 0 <ΣCT / TTL <0.6, where ΣCT is the sum of the center thicknesses of the first lens to the fifth lens on the optical axis, and TTL is The distance from the object side of the first lens to the imaging surface of the imaging lens on the optical axis. More specifically, ΣCT and TTL can further satisfy 0.3 ≦ ΣCT / TTL <0.6, for example, 0.46 ≦ ΣCT / TTL ≦ 0.52. On the premise of ensuring that the total optical length of the system is small, the center thickness of the five lenses is within a reasonable processing range, and the air interval between adjacent lenses is within a certain range to adjust and correct the longitudinal chromatic aberration of the imaging lens.

In an exemplary embodiment, the imaging lens of the present application may satisfy a conditional expression 0.5 ≦ | f / f1 | ≦ 1.5, 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 0.8 ≦ | f / f1 | ≦ 1.2, for example, 0.98 ≦ | f / f1 | ≦ 1.04. Reasonably control the effective focal length of the first lens to balance the third-order distortion and the third-order astigmatism in the meridional direction while correcting the spherical aberration on the system axis.

In an exemplary embodiment, the imaging lens of the present application can satisfy a conditional expression of 0 <ΣAT / TTL <0.5, where ΣAT is an interval distance between any two adjacent lenses among the first lens to the fifth lens on the optical axis. Sum, TTL is the distance from the object side of the first lens to the imaging surface of the imaging lens on the optical axis. More specifically, ΣAT and TTL can further satisfy 0.25 ≦ ΣAT / TTL ≦ 0.45, for example, 0.35 ≦ ΣAT / TTL ≦ 0.39. Satisfying the conditional expression 0 <∑AT / TTL <0.5, can effectively reduce the size of the imaging lens, avoid the volume of the imaging lens being too large, at the same time reduce the assembly difficulty of the lens and achieve a higher space utilization rate.

In an exemplary embodiment, the above-mentioned imaging lens may further include a diaphragm to improve the imaging quality of the lens. The stop can be set at any position as needed, for example, the stop can be set between the first lens and the second 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 five 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. Making the imaging lens more conducive to production and processing and suitable for portable electronic products. The camera lens configured as described above can also have beneficial effects such as ultra-thin, large-caliber, excellent imaging quality, and low sensitivity.

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 spherical lenses, which have a constant curvature from the lens center to the periphery of the lens, aspheric lenses have better curvature radius characteristics, and have the advantages of improving distortion and astigmatic aberrations. 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 imaging lens may be changed to obtain various results and advantages described in this specification. For example, although five lenses have been described as an example in the embodiment, the imaging lens is not limited to including five lenses. If desired, the imaging lens may also include other numbers of lenses. Specific examples of the imaging lens applicable to the above-mentioned 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 2D. 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 E1, a diaphragm STO, a second lens E2, a third lens E3, and a fourth lens along the optical axis in order from the object side to the image side. The lens E4, the fifth lens E5, the filter E6, and the imaging surface S13.

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

Table 1 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 1, where 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 E1 to the fifth lens E5 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-S10 in Example 1. .

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	-1.2113E-02	1.5117E-02	-2.4439E-02	1.8441E-02	-5.8911E-03	0.0000E + 00	0.0000E + 00	0.0000E + 00	0.0000E + 00
S2	1.0084E-02	3.7437E-03	-2.2402E-02	1.0586E-01	-1.9079E-01	1.4947E-01	-4.2840E-02	0.0000E + 00	0.0000E + 00
S3	-8.2955E-02	-1.1329E-01	6.5173E-01	-1.8910E + 00	3.0420E + 00	-2.4347E + 00	8.2042E-01	0.0000E + 00	0.0000E + 00
S4	-1.2377E-01	7.6790E-02	-1.9339E-01	3.7591E-01	-4.0574E-01	2.5113E-01	-6.1651E-02	0.0000E + 00	0.0000E + 00
S5	-4.2727E-02	-2.6046E-02	4.5747E-02	-6.4594E-02	3.9003E-02	-9.8269E-03	8.7484E-04	0.0000E + 00	0.0000E + 00
S6	3.9225E-02	-5.7469E-02	5.4186E-02	-3.2246E-02	1.0277E-02	-1.5188E-03	7.6208E-05	0.0000E + 00	0.0000E + 00
S7	1.6807E-02	-7.2415E-03	-3.1623E-02	4.7269E-02	-2.8941E-02	9.5291E-03	-1.7712E-03	1.7559E-04	-7.2414E-06
S8	-5.3178E-03	2.6135E-02	-3.3577E-02	2.1036E-02	-7.6506E-03	1.6893E-03	-2.2306E-04	1.6193E-05	-4.9754E-07
S9	1.9245E-02	-2.2061E-02	2.4700E-02	-1.3444E-02	4.2321E-03	-8.1330E-04	9.4413E-05	-6.0915E-06	1.6765E-07
S10	-1.9973E-02	-1.2191E-02	1.2589E-02	-6.8544E-03	2.2997E-03	-4.7640E-04	5.8764E-05	-3.9205E-06	1.0819E-07

Table 2

Table 3 shows the half of the effective pixel area diagonal length ImgH on the imaging surface S13, the distance TTL on the optical axis from the object side S1 to the imaging surface S13 of the first lens E1, and the maximum half field angle HFOV , The aperture number Fno (ie, f / EPD), the total effective focal length f of the imaging lens, and the effective focal lengths f1 to f5 of each lens.

ImgH (mm)	3.28	f1 (mm)	3.87
TTL (mm)	4.59	f2 (mm)	-15.58
HFOV (°)	39.29	f3 (mm)	2.73
Fno	1.90	f4 (mm)	-13.46
f (mm)	3.96	f5 (mm)	-2.40

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 a 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 the light passes through the lens. It can be known from FIGS. 2A to 2D 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 4D. 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 E1, a diaphragm STO, a second lens E2, a third lens E3, and a fourth lens. The lens E4, the fifth lens E5, the filter E6, and the imaging surface S13.

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

Table 4 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 2, where the units of the radius of curvature and thickness are both millimeters (mm). As can be seen from Table 4, in Example 2, the object side and the image side of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. 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 half of the diagonal length of the effective pixel area on the imaging plane S13 in the second embodiment, ImgH, the distance TTL on the optical axis from the object side S1 of the first lens E1 to the imaging plane S13, and the maximum half field angle HFOV , The aperture number Fno, the total effective focal length f of the imaging lens, and the effective focal lengths f1 to f5 of each lens.

Table 4

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	-1.7531E-02	1.7854E-02	-3.4734E-02	2.5323E-02	-8.6406E-03	0.0000E + 00	0.0000E + 00	0.0000E + 00	0.0000E + 00
S2	1.8248E-02	-5.3337E-02	2.6334E-01	-6.0391E-01	8.0714E-01	-5.7200E-01	1.7867E-01	0.0000E + 00	0.0000E + 00
S3	-5.5968E-02	-8.7228E-02	1.1030E-01	3.0832E-02	-4.3473E-01	6.7405E-01	-3.3270E-01	0.0000E + 00	0.0000E + 00
S4	-3.5564E-02	-9.7381E-02	1.3049E-01	-6.6141E-02	-3.0505E-02	6.4784E-02	-2.1613E-02	0.0000E + 00	0.0000E + 00
S5	3.7865E-02	-1.4254E-01	1.0430E-01	-9.9561E-02	7.0245E-02	-2.2541E-02	2.6065E-03	0.0000E + 00	0.0000E + 00
S6	1.4331E-01	-2.4184E-01	1.5953E-01	-5.2908E-02	9.5527E-03	-8.8434E-04	2.8689E-05	0.0000E + 00	0.0000E + 00
S7	3.8153E-02	-7.6918E-02	7.6475E-02	-4.3654E-02	1.4816E-02	-2.9948E-03	3.5006E-04	-2.1489E-05	5.1844E-07
S8	-7.1719E-02	1.3828E-01	-1.1914E-01	5.6634E-02	-1.6341E-02	2.9148E-03	-3.1025E-04	1.7733E-05	-4.0741E-07
S9	3.8097E-02	-5.8659E-02	4.9709E-02	-2.1525E-02	5.3885E-03	-8.1152E-04	7.2220E-05	-3.4638E-06	6.7486E-08
S10	6.6411E-04	-4.3396E-02	3.6765E-02	-1.8739E-02	6.0217E-03	-1.2031E-03	1.4324E-04	-9.2239E-06	2.4580E-07

table 5

ImgH (mm)	3.28	f1 (mm)	4.02
TTL (mm)	4.59	f2 (mm)	217.12
HFOV (°)	39.10	f3 (mm)	3.60
Fno	1.88	f4 (mm)	-12.51
f (mm)	4.06	f5 (mm)	-2.41

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 the magnification chromatic aberration curve of the imaging lens of Example 2, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. According to FIG. 4A to FIG. 4D, it can be known that 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 6D. 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 E1, a diaphragm STO, a second lens E2, a third lens E3, and a fourth lens. The lens E4, the fifth lens E5, the filter E6, and the imaging surface S13.

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

Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 3, where the units of the radius of curvature and thickness are millimeters (mm). As can be seen from Table 7, in Example 3, the object side and the image side of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 8 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 3, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above. Table 9 shows the half of the effective pixel region diagonal length ImgH on the imaging surface S13 in Example 3, the distance TTL on the optical axis from the object side S1 to the imaging surface S13 of the first lens E1, and the maximum half field angle HFOV , The aperture number Fno, the total effective focal length f of the imaging lens, and the effective focal lengths f1 to f5 of each lens.

Table 7

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	-2.1105E-02	3.2365E-02	-5.8452E-02	4.3959E-02	-1.4845E-02	0.0000E + 00	0.0000E + 00	0.0000E + 00	0.0000E + 00
S2	6.3249E-03	2.4820E-02	-1.7915E-01	5.2565E-01	-7.8737E-01	5.7588E-01	-1.6494E-01	0.0000E + 00	0.0000E + 00
S3	-8.4146E-02	-1.8606E-01	4.9041E-01	-7.3218E-01	4.5440E-01	5.7647E-02	-1.2174E-01	0.0000E + 00	0.0000E + 00
S4	-8.5205E-02	-5.7962E-02	-2.4817E-02	2.0288E-01	-2.7077E-01	1.7234E-01	-4.0305E-02	0.0000E + 00	0.0000E + 00
S5	1.0275E-01	-2.7746E-01	3.0316E-01	-2.6202E-01	1.3616E-01	-3.5050E-02	3.4637E-03	0.0000E + 00	0.0000E + 00
S6	1.7460E-01	-3.7936E-01	3.7403E-01	-2.0822E-01	6.6158E-02	-1.1054E-02	7.4766E-04	0.0000E + 00	0.0000E + 00
S7	8.6024E-02	-2.4880E-01	2.8497E-01	-1.7607E-01	6.4683E-02	-1.4615E-02	2.0080E-03	-1.5512E-04	5.2054E-06
S8	-2.9909E-02	8.5617E-02	-7.8489E-02	3.6580E-02	-1.0174E-02	1.7561E-03	-1.8158E-04	9.9941E-06	-2.1298E-07
S9	2.1879E-02	-3.4882E-02	3.2630E-02	-1.2697E-02	2.1179E-03	-1.3562E-05	-4.6360E-05	6.1884E-06	-2.6178E-07
S10	-3.3617E-02	-1.1904E-03	2.4703E-03	-6.0130E-04	3.3560E-05	2.7520E-05	-1.0243E-05	1.3970E-06	-6.6231E-08

Table 8

ImgH (mm)	3.28	f1 (mm)	4.06
TTL (mm)	4.59	f2 (mm)	-16.24
HFOV (°)	39.17	f3 (mm)	3.46
Fno	1.89	f4 (mm)	119.98
f (mm)	4.02	f5 (mm)	-2.28

Table 9

FIG. 6A shows an on-axis chromatic aberration curve of the imaging lens of Embodiment 3, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens. FIG. 6B shows an 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 a magnification chromatic aberration curve of the imaging lens of Example 3, which represents deviations of different image heights on the imaging plane after light passes through the lens. According to FIG. 6A to FIG. 6D, it can be known 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 8D. 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 E1, a diaphragm STO, a second lens E2, a third lens E3, and a fourth lens in order from the object side to the image side along the optical axis. The lens E4, the fifth lens E5, the filter E6, and the imaging surface S13.

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

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). As can be seen from Table 10, in Example 4, the object side and the image side of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 11 shows the high-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 the above Embodiment 1. Table 12 shows the half of the diagonal length of the effective pixel area ImgH on the imaging surface S13 in Example 4, the distance TTL on the optical axis from the object side S1 to the imaging surface S13 of the first lens E1, and the maximum half field angle HFOV. , The aperture number Fno, the total effective focal length f of the imaging lens, and the effective focal lengths f1 to f5 of each lens.

Table 10

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	-1.5904E-02	1.4296E-02	-2.5737E-02	1.8047E-02	-6.5702E-03	0.0000E + 00	0.0000E + 00	0.0000E + 00	0.0000E + 00
S2	1.5783E-02	-2.9969E-02	1.3461E-01	-2.9547E-01	3.8911E-01	-2.7698E-01	8.5697E-02	0.0000E + 00	0.0000E + 00
S3	-6.4999E-02	-1.0015E-01	1.4380E-01	1.4991E-01	-9.4463E-01	1.4051E + 00	-6.8934E-01	0.0000E + 00	0.0000E + 00
S4	-8.6487E-02	1.9971E-02	-1.3846E-01	3.0961E-01	-3.2689E-01	1.9569E-01	-4.6929E-02	0.0000E + 00	0.0000E + 00
S5	-3.8753E-03	-7.2063E-02	4.1779E-02	-4.4093E-02	3.3800E-02	-1.0601E-02	1.1459E-03	0.0000E + 00	0.0000E + 00
S6	8.9627E-02	-1.3365E-01	8.4894E-02	-2.9517E-02	6.0226E-03	-6.3034E-04	1.9246E-05	0.0000E + 00	0.0000E + 00
S7	1.5765E-02	-6.2000E-03	-1.6014E-02	2.0524E-02	-1.1052E-02	3.3158E-03	-5.7613E-04	5.4346E-05	-2.1600E-06
S8	-5.6201E-02	1.2420E-01	-1.1724E-01	6.1440E-02	-1.9766E-02	4.0183E-03	-5.0539E-04	3.6004E-05	-1.1133E-06
S9	2.5824E-02	-3.2368E-02	3.1434E-02	-1.5791E-02	4.6983E-03	-8.6326E-04	9.6404E-05	-6.0044E-06	1.5989E-07
S10	-1.4350E-02	-2.0333E-02	1.7300E-02	-8.4870E-03	2.7028E-03	-5.5480E-04	6.9654E-05	-4.7938E-06	1.3730E-07

Table 11

ImgH (mm)	3.28	f1 (mm)	3.92
TTL (mm)	4.59	f2 (mm)	-28.21
HFOV (°)	39.10	f3 (mm)	3.20
Fno	1.90	f4 (mm)	-16.38

f (mm)

4.06

f5 (mm)

-2.41

Table 12

FIG. 8A shows the 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 an astigmatism curve of the imaging lens of Example 4, which represents a meridional image plane curvature and a sagittal image plane curvature. FIG. 8C illustrates a 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. 8A to 8D, 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 10D. 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 E1, a diaphragm STO, a second lens E2, a third lens E3, and a fourth lens. The lens E4, the fifth lens E5, the filter E6, and the imaging surface S13.

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

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). As can be seen from Table 13, in Example 5, the object side and the image side of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. 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 the above Embodiment 1. Table 15 shows the half of the effective pixel region diagonal length ImgH on the imaging surface S13, the distance TTL on the optical axis from the object side S1 to the imaging surface S13 of the first lens E1, and the maximum half field angle HFOV in Example 5. , The aperture number Fno, the total effective focal length f of the imaging lens, and the effective focal lengths f1 to f5 of each lens.

Table 13

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	-1.6539E-02	1.2068E-02	-2.5512E-02	1.8631E-02	-7.1541E-03	0.0000E + 00	0.0000E + 00	0.0000E + 00	0.0000E + 00
S2	1.3173E-02	-3.1866E-03	1.6618E-02	2.4095E-02	-8.2255E-02	8.4430E-02	-2.2679E-02	0.0000E + 00	0.0000E + 00
S3	-7.6971E-02	-6.2150E-02	-2.1933E-02	4.9208E-01	-1.2912E + 00	1.4446E + 00	-6.0231E-01	0.0000E + 00	0.0000E + 00
S4	-8.0821E-02	1.8394E-04	-1.1329E-01	2.7228E-01	-2.8951E-01	1.6580E-01	-3.7227E-02	0.0000E + 00	0.0000E + 00
S5	1.7735E-02	-9.9502E-02	6.0760E-02	-6.3203E-02	4.6227E-02	-1.4226E-02	1.5259E-03	0.0000E + 00	0.0000E + 00
S6	1.1673E-01	-1.9002E-01	1.3130E-01	-4.8652E-02	1.0202E-02	-1.0815E-03	3.6986E-05	0.0000E + 00	0.0000E + 00
S7	3.6738E-02	-6.8501E-02	6.0050E-02	-2.9253E-02	8.1946E-03	-1.2554E-03	8.4414E-05	6.5939E-07	-2.6671E-07
S8	-5.8450E-02	1.2139E-01	-1.1090E-01	5.5692E-02	-1.7112E-02	3.3053E-03	-3.9098E-04	2.5824E-05	-7.2886E-07
S9	2.9826E-02	-4.6945E-02	4.6325E-02	-2.3043E-02	6.6573E-03	-1.1729E-03	1.2487E-04	-7.4202E-06	1.8969E-07
S10	-7.2948E-03	-3.1591E-02	2.8207E-02	-1.4916E-02	4.9799E-03	-1.0384E-03	1.2971E-04	-8.8067E-06	2.4871E-07

Table 14

ImgH (mm)	3.28	f1 (mm)	4.00
TTL (mm)	4.59	f2 (mm)	-22.72
HFOV (°)	39.10	f3 (mm)	3.18
Fno	1.89	f4 (mm)	-12.62
f (mm)	4.06	f5 (mm)	-2.48

Table 15

FIG. 10A shows an on-axis chromatic aberration curve of the imaging lens of Embodiment 5, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens. FIG. 10B shows an 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 the distortion curve of the imaging lens of Example 5, which represents the value of the distortion magnitude corresponding to different image heights. FIG. 10D shows the magnification chromatic aberration curve of the imaging lens of Example 5, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. 10A to 10D, it can be known that 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 12D. 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 E1, a diaphragm STO, a second lens E2, a third lens E3, and a fourth lens. The lens E4, the fifth lens E5, the filter E6, and the imaging surface S13.

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

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 millimeters (mm). As can be seen from Table 16, in Example 6, the object side and the image side of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. 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 the above Embodiment 1. Table 18 shows the half of the effective pixel area diagonal length ImgH on the imaging surface S13, the distance TTL on the optical axis from the object side S1 of the first lens E1 to the imaging surface S13 in Example 6, and the maximum half field angle HFOV , The aperture number Fno, the total effective focal length f of the imaging lens, and the effective focal lengths f1 to f5 of each lens.

Table 16

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	-1.1906E-02	6.9771E-03	-9.8129E-03	3.7798E-03	-7.4356E-04	0.0000E + 00	0.0000E + 00	0.0000E + 00	0.0000E + 00
S2	2.1325E-02	-8.2544E-02	3.9490E-01	-9.8189E-01	1.4093E + 00	-1.0763E + 00	3.4082E-01	0.0000E + 00	0.0000E + 00
S3	-1.0999E-01	1.6214E-01	-7.5355E-01	2.0973E + 00	-3.4182E + 00	3.0975E + 00	-1.1449E + 00	0.0000E + 00	0.0000E + 00
S4	-1.2805E-01	8.8052E-02	-2.1308E-01	3.8187E-01	-3.8842E-01	2.2680E-01	-5.3285E-02	0.0000E + 00	0.0000E + 00
S5	-3.3838E-02	-3.2152E-02	4.8516E-02	-5.6532E-02	3.1017E-02	-7.4190E-03	6.4350E-04	0.0000E + 00	0.0000E + 00
S6	3.7379E-02	-5.2825E-02	5.1006E-02	-3.1983E-02	1.0919E-02	-1.7993E-03	1.1159E-04	0.0000E + 00	0.0000E + 00
S7	9.3955E-03	4.5443E-03	-3.3489E-02	3.8172E-02	-2.0792E-02	6.3744E-03	-1.1254E-03	1.0696E-04	-4.2450E-06
S8	6.4871E-04	1.1695E-02	-1.8420E-02	1.1181E-02	-3.8018E-03	7.9660E-04	-1.0264E-04	7.4779E-06	-2.3639E-07
S9	1.7458E-02	-1.8899E-02	2.0576E-02	-1.0533E-02	3.0409E-03	-5.2063E-04	5.1783E-05	-2.6970E-06	5.3845E-08
S10	-4.0419E-03	-1.1757E-02	7.7347E-03	-3.4535E-03	9.8762E-04	-1.7342E-04	1.7650E-05	-9.0903E-07	1.6509E-08

Table 17

ImgH (mm)	3.28	f1 (mm)	3.93
TTL (mm)	4.59	f2 (mm)	-19.72
HFOV (°)	39.68	f3 (mm)	2.82
Fno	1.90	f4 (mm)	-10.36
f (mm)	3.90	f5 (mm)	-2.56

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 shows the meridional image plane curvature and sagittal image plane curvature. FIG. 12C shows the distortion curve of the imaging lens of Example 6, which represents the value of the distortion magnitude corresponding to different image heights. FIG. 12D shows the magnification chromatic aberration curve of the imaging lens of Example 6, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. According to FIG. 12A to FIG. 12D, 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 14D. 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, in order from the object side to the image side along the optical axis, a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a fourth The lens E4, the fifth lens E5, the filter E6, and the imaging surface S13.

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

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 both millimeters (mm). As can be seen from Table 19, in Example 7, the object side and the image side of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. 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 half of the effective pixel area diagonal length ImgH on the imaging surface S13, the distance TTL on the optical axis from the object side S1 of the first lens E1 to the imaging surface S13 in Example 7, and the maximum half field angle HFOV , The aperture number Fno, the total effective focal length f of the imaging lens, and the effective focal lengths f1 to f5 of each lens.

Table 19

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1	-1.5968E-02	-4.6582E-03	-3.1733E-03	-6.4862E-04	-3.5023E-04	0.0000E + 00	0.0000E + 00	0.0000E + 00	0.0000E + 00
S2	7.9713E-03	-2.0253E-01	6.3334E-01	-1.1972E + 00	1.2958E + 00	-7.4381E-01	1.7520E-01	0.0000E + 00	0.0000E + 00
S3	-5.2950E-02	-1.0924E-01	5.6624E-01	-1.4221E + 00	2.0356E + 00	-1.3735E + 00	3.5195E-01	0.0000E + 00	0.0000E + 00
S4	-1.4121E-01	7.7958E-02	-1.0849E-01	1.1191E-01	-5.6875E-02	4.5352E-02	-1.6386E-02	0.0000E + 00	0.0000E + 00
S5	-1.0324E-02	-5.4241E-02	6.2664E-03	-9.6842E-03	1.2164E-02	-5.6204E-03	9.2732E-04	0.0000E + 00	0.0000E + 00
S6	1.1214E-01	-1.7375E-01	1.2327E-01	-4.4254E-02	7.0641E-03	-1.2882E-04	-6.0330E-05	0.0000E + 00	0.0000E + 00
S7	2.1890E-02	-2.8576E-02	-5.1795E-03	2.6310E-02	-1.7059E-02	5.1603E-03	-8.2574E-04	6.7356E-05	-2.2008E-06
S8	-3.6555E-02	1.6009E-01	-1.9305E-01	1.2067E-01	-4.6141E-02	1.1265E-02	-1.7204E-03	1.4970E-04	-5.6483E-06
S9	8.7134E-04	1.0272E-02	-4.0735E-03	1.4455E-03	-4.3606E-04	8.7431E-05	-1.0388E-05	6.6289E-07	-1.7691E-08
S10	-1.1432E-02	-2.2455E-02	1.9299E-02	-9.6213E-03	3.0062E-03	-5.8454E-04	6.8145E-05	-4.3305E-06	1.1470E-07

Table 20

ImgH (mm)	3.26	f1 (mm)	3.89
TTL (mm)	4.58	f2 (mm)	-29.07
HFOV (°)	40.10	f3 (mm)	3.08
Fno	1.90	f4 (mm)	-9.22
f (mm)	3.83	f5 (mm)	-2.33

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 an 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 a 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. 14A to 14D, it can be known that the imaging lens provided in Embodiment 7 can achieve good imaging quality.

Example 8

An imaging lens according to Embodiment 8 of the present application is described below with reference to FIGS. 15 to 16D. FIG. 15 is a schematic structural diagram of an imaging lens according to Embodiment 8 of the present application.

As shown in FIG. 15, 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 E1, a diaphragm STO, a second lens E2, a third lens E3, and a fourth lens. The lens E4, the fifth lens E5, the filter E6, and the imaging surface S13.

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

Table 22 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 8, where the units of the radius of curvature and thickness are millimeters (mm). As can be seen from Table 22, in Example 8, the object side and the image side of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 23 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 8, where each aspheric surface type can be defined by the formula (1) given in the above Embodiment 1. Table 24 shows the half of the diagonal length of the effective pixel area ImgH on the imaging surface S13 in Example 8, the distance TTL on the optical axis from the object side S1 of the first lens E1 to the imaging surface S13, and the maximum half field angle HFOV. , The aperture number Fno, the total effective focal length f of the imaging lens, and the effective focal lengths f1 to f5 of each lens.

Table 22

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	-1.4804E-02	6.0700E-03	-1.6180E-02	1.1640E-02	-5.3912E-03	0.0000E + 00	0.0000E + 00	0.0000E + 00	0.0000E + 00
S2	1.3040E-02	1.6096E-03	-1.2894E-02	1.0702E-01	-2.0667E-01	1.8082E-01	-5.3780E-02	0.0000E + 00	0.0000E + 00
S3	-1.0370E-01	5.6191E-02	-4.6302E-01	1.5458E + 00	-2.7760E + 00	2.5659E + 00	-9.6486E-01	0.0000E + 00	0.0000E + 00
S4	-1.3225E-01	1.2430E-01	-3.3284E-01	4.8310E-01	-3.7847E-01	1.6615E-01	-3.0858E-02	0.0000E + 00	0.0000E + 00
S5	-2.4088E-02	3.6384E-02	-1.3210E-01	9.5562E-02	-2.6063E-02	2.3680E-03	3.0653E-05	0.0000E + 00	0.0000E + 00
S6	9.3415E-02	-1.5623E-01	1.3608E-01	-7.3526E-02	2.3981E-02	-4.1713E-03	2.9219E-04	0.0000E + 00	0.0000E + 00
S7	5.8725E-02	-1.4209E-01	1.4807E-01	-8.5937E-02	2.9835E-02	-6.3313E-03	8.0592E-04	-5.6588E-05	1.6856E-06
S8	-3.7880E-02	7.9742E-02	-7.4629E-02	3.9062E-02	-1.2646E-02	2.5868E-03	-3.2461E-04	2.2762E-05	-6.8283E-07
S9	5.4313E-03	1.4076E-02	-1.2118E-02	7.2176E-03	-2.5981E-03	5.5110E-04	-6.7789E-05	4.4810E-06	-1.2329E-07
S10	-1.0715E-02	-7.5197E-03	5.6199E-03	-3.4021E-03	1.3486E-03	-3.0922E-04	3.9728E-05	-2.6541E-06	7.1717E-08

Table 23

ImgH (mm)	3.28	f1 (mm)	3.98
TTL (mm)	4.59	f2 (mm)	-11.78
HFOV (°)	39.09	f3 (mm)	3.29
Fno	1.89	f4 (mm)	-20.47
f (mm)	3.99	f5 (mm)	-2.56

Table 24

FIG. 16A shows an on-axis chromatic aberration curve of the imaging lens of Example 8, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens. FIG. 16B shows an astigmatism curve of the imaging lens of Example 8, which represents a meridional image plane curvature and a sagittal image plane curvature. FIG. 16C shows the distortion curve of the imaging lens of Example 8, which represents the value of the distortion magnitude corresponding to different image heights. FIG. 16D shows the magnification chromatic aberration curve of the imaging lens of Example 8, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. According to FIG. 16A to FIG. 16D, it can be known that the imaging lens provided in Embodiment 8 can achieve good imaging quality.

Example 9

The imaging lens according to Embodiment 9 of the present application is described below with reference to FIGS. FIG. 17 is a schematic structural diagram of an imaging lens according to Embodiment 9 of the present application.

As shown in FIG. 17, 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 E1, a diaphragm STO, a second lens E2, a third lens E3, a fourth The lens E4, the fifth lens E5, the filter E6, and the imaging surface S13.

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

Table 25 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of Example 9, where the units of the radius of curvature and thickness are millimeters (mm). As can be seen from Table 25, in Example 9, the object side and the image side of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces. Table 26 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 9, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above. Table 27 shows half of the effective pixel area diagonal length ImgH on the imaging surface S13, the distance TTL on the optical axis from the object side S1 to the imaging surface S13 of the first lens E1, and the maximum half field angle HFOV , The aperture number Fno, the total effective focal length f of the imaging lens, and the effective focal lengths f1 to f5 of each lens.

Table 25

Face number	A4	A6	A8	A10	A12	A14	A16	A18	A20
S1	-1.6066E-02	1.5681E-02	-1.6990E-02	5.9746E-03	-9.1351E-04	0.0000E + 00	0.0000E + 00	0.0000E + 00	0.0000E + 00
S2	5.4397E-02	-3.5477E-01	1.5527E + 00	-3.7357E + 00	5.0924E + 00	-3.6688E + 00	1.0871E + 00	0.0000E + 00	0.0000E + 00
S3	-8.1438E-02	-5.2207E-01	2.4170E + 00	-6.0390E + 00	8.3694E + 00	-5.7729E + 00	1.5902E + 00	0.0000E + 00	0.0000E + 00
S4	-1.3787E-01	-3.1989E-01	1.0940E + 00	-1.8262E + 00	1.6467E + 00	-6.8948E-01	1.0207E-01	0.0000E + 00	0.0000E + 00
S5	-3.2583E-02	-6.4175E-02	8.3603E-02	-9.6719E-02	5.7406E-02	-1.4951E-02	1.3923E-03	0.0000E + 00	0.0000E + 00
S6	1.0031E-02	-4.6244E-03	2.3251E-02	-2.8223E-02	1.2971E-02	-2.5711E-03	1.8487E-04	0.0000E + 00	0.0000E + 00

S7	2.5333E-02	-6.2031E-02	6.7515E-02	-3.5032E-02	8.9864E-03	-8.5322E-04	-8.1529E-05	2.3807E-05	-1.4218E-06
S8	2.2294E-03	-5.4585E-03	-2.6575E-03	2.2620E-03	-4.7849E-04	-2.6317E-07	1.2683E-05	-1.4779E-06	4.3049E-08
S9	1.9329E-02	-2.9731E-02	3.3996E-02	-1.9345E-02	6.4052E-03	-1.2943E-03	1.5727E-04	-1.0547E-05	2.9952E-07
S10	1.2400E-02	4.0552E-02	-6.2673E-02	3.6734E-02	-1.1909E-02	2.3047E-03	-2.6487E-04	1.6703E-05	-4.4577E-07

Table 26

ImgH (mm)	3.28	f1 (mm)	3.86
TTL (mm)	4.58	f2 (mm)	-9.72
HFOV (°)	39.58	f3 (mm)	2.35
Fno	1.90	f4 (mm)	-4.68
f (mm)	3.87	f5 (mm)	-85672.34

Table 27

FIG. 18A shows an on-axis chromatic aberration curve of the imaging lens of Example 9, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens. FIG. 18B shows an astigmatism curve of the imaging lens of Example 9, which represents a meridional image plane curvature and a sagittal image plane curvature. FIG. 18C shows a distortion curve of the imaging lens of Example 9, which represents the magnitude of the distortion corresponding to different image heights. FIG. 18D shows the magnification chromatic aberration curve of the imaging lens of Example 9, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. It can be known from FIG. 18A to FIG. 18D that the imaging lens provided in Embodiment 9 can achieve good imaging quality.

In summary, Examples 1 to 9 satisfy the relationships shown in Table 28 respectively.

Conditional expression / example	1	2	3	4	5	6	7	8	9
f / EPD	1.90	1.88	1.89	1.90	1.89	1.90	1.90	1.89	1.90
R9 / f	-0.36	-0.36	-0.44	-0.36	-0.37	-0.35	-0.37	-0.39	-0.22
TTL / ImgH	1.40	1.40	1.40	1.40	1.40	1.40	1.40	1.40	1.40
| R1 / R2 |	0.35	0.38	0.32	0.37	0.37	0.37	0.00	0.37	0.39
DT41 / DT42	0.94	0.94	0.94	0.94	0.93	0.94	0.92	0.95	0.92
R6 / R4	0.36	0.37	0.11	0.36	0.24	0.42	0.42	0.15	0.26
CT4 / CT1	0.28	0.23	0.26	0.27	0.24	0.25	0.23	0.28	0.31
T34 / T12	0.04	0.05	0.11	0.06	0.04	0.05	0.03	0.04	0.21
∑CT / TTL	0.48	0.50	0.46	0.48	0.48	0.49	0.48	0.48	0.52
(f1 + f3) / f	1.67	1.88	1.87	1.76	1.77	1.73	1.82	1.82	1.60
| f / f1 |	1.02	1.01	0.99	1.04	1.01	0.99	0.98	1.00	1.00
∑AT / TTL	0.35	0.36	0.37	0.36	0.37	0.36	0.39	0.39	0.39

Table 28

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 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 should also cover the above technical features without departing from the inventive concept. Or other technical solutions formed by any combination of equivalent features. For example, a technical solution formed by replacing the above features with technical features disclosed in the present application (but not limited to) with similar functions.

Claims (24)

1. The imaging lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens in order from the object side to the image side along the optical axis, and is characterized in that:

   The first lens has positive power and its object side is convex; the second lens has power and its image side is convex; the third lens has positive power and its image side is convex; the The fourth lens has optical power; the fifth lens has optical power, and its object side is concave; among the first lens to the fifth lens, there is an air gap between any two adjacent lenses; And the effective focal length f1 of the first lens, the effective focal length f3 of the third lens, and the total effective focal length f of the imaging lens satisfy 0 <(f1 + f3) / f <2.5.
2. The imaging lens according to claim 1, wherein the maximum effective half-aperture DT41 of the object side of the fourth lens and the maximum effective half-aperture DT42 of the image side of the fourth lens satisfy 0.5 <DT41 / DT42 < 1.5.
3. The imaging lens according to claim 1, wherein a curvature radius R9 of the object side of the fifth lens and a total effective focal length f of the imaging lens satisfy -1 <R9 / f <0.
4. The imaging lens according to claim 1, wherein the image side of the first lens is concave; the curvature radius R1 of the object side of the first lens and the curvature radius R2 of the image side of the first lens Satisfy 0 <| R1 / R2 | <0.5.
5. The imaging lens according to claim 1, wherein the curvature radius R6 of the image side of the third lens and the curvature radius R4 of the image side of the second lens satisfy 0 <R6 / R4 <1.
6. The imaging lens according to claim 1, wherein a center thickness CT1 of the first lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy 0 <CT4 / CT1 <0.4.
7. The imaging lens according to claim 1, wherein a separation distance T12 between the first lens and the second lens on the optical axis, and the third lens and the fourth lens are in the optical axis. The separation distance T34 on the optical axis satisfies 0 <T34 / T12 <0.5.
8. The imaging lens according to claim 1, wherein an effective focal length f1 of the first lens and a total effective focal length f of the imaging lens satisfy 0.5 ≦ | f / f1 | ≦ 1.5.
9. 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 <2.
10. The imaging lens according to any one of claims 1 to 8, wherein a distance TTL from the object side of the first lens to an imaging surface of the imaging lens on the optical axis is equal to the imaging lens. The half of the diagonal length of the effective pixel area on the imaging surface of ImgH satisfies TTL / ImgH <1.6.
11. The imaging lens according to any one of claims 1 to 8, wherein the sum of the center thicknesses of the first lens to the fifth lens on the optical axis ΣCT and the first The distance TTL on the optical axis from the object side of the lens to the imaging surface of the imaging lens satisfies 0 <ΣCT / TTL <0.6.
12. The imaging lens according to any one of claims 1 to 8, wherein the sum of the separation distances of any two adjacent lenses on the optical axis from the first lens to the fifth lens ΣAT A distance TTL from the object side surface of the first lens to the imaging surface of the imaging lens on the optical axis satisfies 0 <ΣAT / TTL <0.5.
13. The imaging lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens in order from the object side to the image side along the optical axis, and is characterized in that:

    The first lens has positive power and its object side is convex; the second lens has power and its image side is convex; the third lens has positive power and its image side is convex; the The fourth lens has a power; the fifth lens has a negative power, and the object side is concave; among the first lens to the fifth lens, there is an air gap between any two adjacent lenses ; And the effective focal length f1 of the first lens and the total effective focal length f of the imaging lens satisfy 0.5 ≦ | f / f1 | ≦ 1.5.
14. The imaging lens according to claim 13, wherein the image side of the first lens is concave; the curvature radius R1 of the object side of the first lens and the curvature radius R2 of the image side of the first lens Satisfy 0 <| R1 / R2 | <0.5.
15. The imaging lens according to claim 14, wherein an effective focal length f1 of the first lens, an effective focal length f3 of the third lens, and a total effective focal length f of the imaging lens satisfy 0 <(f1 + f3 ) / f <2.5.
16. The imaging lens according to claim 13, wherein the curvature radius R6 of the image side of the third lens and the curvature radius R4 of the image side of the second lens satisfy 0 <R6 / R4 <1.
17. The imaging lens according to claim 13, wherein a curvature radius R9 of the object side of the fifth lens and a total effective focal length f of the imaging lens satisfy −1 <R9 / f <0.
18. The imaging lens according to claim 13, wherein the sum of the center thicknesses of the first lens to the fifth lens on the optical axis ΣCT and the object side of the first lens to The distance TTL of the imaging surface of the imaging lens on the optical axis satisfies 0 <ΣCT / TTL <0.6.
19. The imaging lens according to claim 18, wherein a center thickness CT1 of the first lens on the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy 0 <CT4 / CT1 <0.4.
20. The imaging lens according to claim 19, wherein the maximum effective half-diameter DT41 of the object side of the fourth lens and the maximum effective half-diameter DT42 of the image side of the fourth lens satisfy 0.5 <DT41 / DT42 < 1.5.
21. The imaging lens according to claim 13, wherein the sum of the separation distance of any two adjacent lenses on the optical axis from the first lens to the fifth lens ΣAT and the first lens The distance TTL on the optical axis from the object side to the imaging surface of the imaging lens satisfies 0 <ΣAT / TTL <0.5.
22. The imaging lens according to claim 21, wherein a separation distance T12 on the optical axis of the first lens and the second lens is between the third lens and the fourth lens on the optical axis. The separation distance T34 on the optical axis satisfies 0 <T34 / T12 <0.5.
23. The imaging lens according to claim 13, wherein a distance TTL on the optical axis from the object side of the first lens to an imaging surface of the imaging lens and an effective pixel on the imaging surface of the imaging lens Half the diagonal length of the area ImgH satisfies TTL / ImgH <1.6.
24. The imaging lens according to claim 13, wherein a total effective focal length f of the imaging lens and an entrance pupil diameter EPD of the imaging lens satisfy f / EPD <2.

Images