An optical camera lens

Abstract

The present invention discloses an optical imaging lens. The optical imaging lens sequentially includes, from the object side to the image side along the optical axis: a first lens with positive optical power, the object side surface of which is convex; a second lens with negative optical power, the image side surface of which is concave; a third lens with positive optical power, the object side surface of which is convex and the image side surface of which is concave; at least one lens is a glass lens; wherein, the distance TTL from the object side surface of the first lens of the optical imaging lens to the imaging surface on the optical axis and the effective focal length f of the optical imaging lens satisfy: TTL / f < 0.9; the distance BFL from the image side surface of the last lens of the optical imaging lens to the imaging surface on the optical axis and the distance TTL from the object side surface of the first lens of the optical imaging lens to the imaging surface on the optical axis satisfy: 0.3 < BFL / TTL < 1.0. The optical imaging lens provided by the present invention can reasonably control the ratio of TTL and f, which can ensure better resolution when shooting at a long distance and can be better applied to a periscope structure to solve the conflict problem between the lens module and the thin and light body.

Description

Technical Field

[0001] The invention belongs to the field of optical imaging, and in particular relates to an optical camera lens comprising three lenses. Background Art

[0002] As we all know, telephoto shooting is more stable, but traditional telescopic lenses have the problem of unstable shooting. In addition, the beauty and thinness of smartphones are the major premise, and the use of telescopic zoom lenses will affect the thickness and reliability of the body, so internal zoom is the best way for mobile phones to achieve optical zoom. In order to achieve zoom in an ultra-thin body, telephoto lenses have gradually begun to adopt a periscope structure.

[0003] Compared with the traditional telescopic zoom lens, the advantage of the periscope telephoto lens is that it greatly increases the focal length to make up for the shortcomings of the internal zoom and achieve professional-level camera standards; it has obvious waterproof advantages, and the periscope lens can be completely enclosed in the body; it reduces the thickness of the body, which makes up for the problem of body thickening caused by optical zoom.

[0004] Therefore, in order to meet the requirements of smartphones for telephoto lenses, a three-piece telephoto lens is needed that can be better applied to the periscope structure to solve the conflict problem between the lens module and the thin and light body. Summary of the invention

[0005] The present invention aims to provide an optical camera lens composed of three lenses. The optical camera lens is a three-lens telephoto lens and can be well applied to a periscope structure to solve the conflict problem between a lens module and a thin and light body.

[0006] One aspect of the present invention provides an optical camera lens, which includes, in order from the object side to the image side along the optical axis: a first lens; a second lens; a third lens; at least one lens is a glass lens.

[0007] Wherein, the distance TTL from the object side of the first lens of the optical camera lens to the imaging plane on the optical axis and the effective focal length f of the optical camera lens satisfy: TTL / f<0.9; the distance BFL from the image side of the last lens of the optical camera lens to the imaging plane on the optical axis and the distance TTL from the object side of the first lens of the optical camera lens to the imaging plane on the optical axis satisfy: 0.3 <BFL / TTL<1.0。

[0008] According to one embodiment of the present invention, a maximum value Nmax among the refractive indices of the three lenses satisfies: Nmax>1.80.

[0009] According to one embodiment of the present invention, the dispersion coefficient V1 of the first lens and the dispersion coefficient V3 of the third lens satisfy: 30.0 <V1-V3<40.0。

[0010] According to one embodiment of the present invention, a refractive index N1 of the first lens, a refractive index N2 of the second lens, and a refractive index N3 of the third lens satisfy: 1.51<(N1+N2) / N3<2.05.

[0011] According to one embodiment of the present invention, the effective focal length f3 of the third lens and the effective focal length f2 of the second lens satisfy: 0.5<(f3+f2) / (f3-f2)<1.0.

[0012] According to one embodiment of the present invention, the curvature radius R1 of the object side surface of the first lens and the effective focal length f1 of the first lens satisfy: 0.3 <R1 / f1<0.8。

[0013] According to one embodiment of the present invention, the curvature radius R4 of the image side surface of the second lens, the curvature radius R5 of the object side surface of the third lens, and the curvature radius R6 of the image side surface of the third lens satisfy: <R4 / (R5+R6)<1.0。

[0014] According to one embodiment of the present invention, the center thickness CT2 of the second lens on the optical axis and the edge thickness ET2 of the second lens satisfy: 0.4 <CT2 / ET2<0.9。

[0015] According to one embodiment of the present invention, the edge thickness ET3 of the third lens and the center thickness CT3 of the third lens on the optical axis satisfy: 0.5 <ET3 / CT3<1.0。

[0016] According to one embodiment of the present invention, the on-axis distance SAG22 between the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens and the on-axis distance SAG11 between the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens satisfy: 0.3 <SAG22 / SAG11<0.8。

[0017] According to one embodiment of the present invention, the first lens has positive optical power, and its object side surface is convex; the second lens has negative optical power, and its image side surface is concave; the third lens has positive optical power, and its object side surface is convex and its image side surface is concave.

[0018] According to one embodiment of the present invention, the second lens is a glass lens, and both the object-side surface and the image-side surface thereof are aspherical surfaces.

[0019] According to one embodiment of the present invention, the third lens is a glass lens, and both the object-side surface and the image-side surface of the third lens are spherical surfaces.

[0020] Another aspect of the present invention provides an optical camera lens, which includes, in order from the object side to the image side along the optical axis: a first lens; a second lens; a third lens; at least one lens is a glass lens.

[0021] Among them, each lens is independent of each other, and there is an air gap between each lens on the optical axis; the distance TTL from the object side of the first lens of the optical camera lens to the imaging plane on the optical axis and the effective focal length f of the optical camera lens satisfy: TTL / f<0.9; the maximum value Nmax among the refractive indices of the three lenses satisfies: Nmax>1.80.

[0022] Beneficial effects of the present invention:

[0023] The optical camera lens provided by the present invention includes multiple lenses, such as the first lens to the third lens. The optical camera lens reasonably controls the ratio of TTL and f, which is conducive to achieving a larger effective focal length while achieving a shorter optical total length TTL, and can ensure that there is still good resolution when shooting at a long distance. Reasonable control of the ratio of BFL and TTL is conducive to making the optical system structure more compact, improving the lens production yield, and can be well applied to the periscope structure to solve the conflict problem between the lens module and the thin and light body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 Schematic diagram of the structure of the lens group of the optical camera lens embodiment 1 of the present invention;

[0026] Figure 2a to Figure 2d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve and a magnification chromatic aberration curve of the optical camera lens embodiment 1 of the present invention;

[0027] Figure 3 Schematic diagram of the lens group structure of Embodiment 2 of the optical camera lens of the present invention;

[0028] Figures 4a to 4d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve and a magnification chromatic aberration curve of the optical camera lens embodiment 2 of the present invention;

[0029] Figure 5 Schematic diagram of the lens group structure of Embodiment 3 of the optical camera lens of the present invention;

[0030] Figures 6a to 6d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve and a magnification chromatic aberration curve of Embodiment 3 of the optical camera lens of the present invention;

[0031] Figure 7Schematic diagram of the structure of a lens group of an optical camera lens embodiment 4 of the present invention;

[0032] Figures 8a to 8d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve and a magnification chromatic aberration curve of the optical camera lens embodiment 4 of the present invention;

[0033] Fig. 9 Schematic diagram of the lens group structure of Embodiment 5 of the optical camera lens of the present invention;

[0034] Figures 10a to 10d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve and a magnification chromatic aberration curve of the optical camera lens embodiment 5 of the present invention;

[0035] Fig.11 Schematic diagram of the structure of a lens group of an optical camera lens embodiment 6 of the present invention;

[0036] Figures 12a to 12d They are respectively an axial chromatic aberration curve, an astigmatism curve, a distortion curve and a magnification chromatic aberration curve of the optical camera lens embodiment 6 of the present invention;

[0037] Fig.13 Schematic diagram of the structure of a lens group of an optical camera lens embodiment 7 of the present invention;

[0038] Figures 14a to 14d They are respectively the axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical camera lens embodiment 7 of the present invention. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present invention, the first lens discussed below may also be referred to as the second lens or the third lens.

[0041] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying 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". And, the term "exemplary" is intended to refer to an example or illustration.

[0042] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0043] In the description of the present invention, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region. If the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0044] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal way unless explicitly defined in this article.

[0045] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The features, principles and other aspects of the present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0046] Exemplary Embodiments

[0047] The optical camera lens of the exemplary embodiment of the present invention includes three lenses, which include: a first lens, a second lens and a third lens in order from the object side to the image side along the optical axis, wherein each lens is independent of each other and has an air gap between each lens on the optical axis.

[0048] In this exemplary embodiment, at least one of the first lens, the second lens, and the third lens is a glass lens.

[0049] In this exemplary embodiment, the conditional expression satisfied by the distance TTL from the object side surface of the first lens of the optical camera lens to the imaging surface on the optical axis and the effective focal length f of the optical camera lens is: TTL / f < 0.9. Reasonably controlling the ratio of TTL to f is beneficial to achieving a larger effective focal length while achieving a shorter overall optical length TTL, and can ensure better resolution when shooting at a long distance. More specifically, it satisfies: 0.8 < TTL / f < 0.9. For example, 0.85 ≤ TTL / f ≤ 0.89.

[0050] In this exemplary embodiment, the conditional expression satisfied by the distance BFL from the image side surface of the last lens of the optical camera lens to the imaging surface on the optical axis and the distance TTL from the object side surface of the first lens of the optical camera lens to the imaging surface on the optical axis is: 0.3 < BFL / TTL < 1.0. Reasonably controlling the ratio of BFL to TTL is beneficial to making the optical system structure more compact and improving the production yield of the lens. More specifically, it satisfies: 0.4 < BFL / TTL < 0.8. For example, 0.48 ≤ BFL / TTL ≤ 0.76.

[0051] In this exemplary embodiment, the conditional expression satisfied by the maximum value Nmax among the refractive indices of the three lenses is: Nmax > 1.80. Using a high refractive index material is beneficial to better balancing the aberration of the optical imaging lens group and is also beneficial to improving the resolution of the system. More specifically, it satisfies: 1.9 < Nmax < 2.1. For example, 1.93 ≤ Nmax ≤ 2.02.

[0052] In this exemplary embodiment, the conditional expression satisfied by the dispersion coefficient V1 of the first lens and the dispersion coefficient V3 of the third lens is: 30.0 < V1 - V3 < 40.0. Reasonably controlling the difference between the dispersion coefficients of the first lens and the third lens is beneficial to ensuring that the optical system has a small chromatic aberration. More specifically, it satisfies: 35.0 < V1 - V3 < 36.0. For example, 35.14 ≤ V1 - V3 ≤ 35.25.

[0053] In this exemplary embodiment, the conditional expression satisfied by the refractive index N1 of the first lens, the refractive index N2 of the second lens, and the refractive index N3 of the third lens is: 1.51 < (N1 + N2) / N3 < 2.05. Reasonably controlling the ratio of the sum of the refractive indices of the first and second lenses to the refractive index of the third lens helps to adjust the chief ray angle of the optical system, can effectively improve the relative illumination of the optical system, and enhance the image plane clarity. More specifically, it satisfies: 1.6 < (N1 + N2) / N3 < 1.7. For example, 1.61 ≤ (N1 + N2) / N3 ≤ 1.68.

[0054] In this exemplary embodiment, the conditional expression satisfied by the effective focal length f3 of the third lens and the effective focal length f2 of the second lens is: 0.5 < (f3 + f2) / (f3 - f2) < 1.0. Reasonably distributing the optical powers of the second and third lenses can effectively improve the aberrations of the system. More specifically, it satisfies: 0.6 < (f3 + f2) / (f3 - f2) < 0.95. For example, 0.65 ≤ (f3 + f2) / (f3 - f2) ≤ 0.93.

[0055] In this exemplary embodiment, the conditional expression satisfied by the radius of curvature R1 of the object side surface of the first lens and the effective focal length f1 of the first lens is: 0.3 < R1 / f1 < 0.8. By constraining the ratio of the radius of curvature of the object side surface of the first lens to the effective focal length of the first lens within a certain range, the magnitude of optical distortion can be reduced to ensure good imaging quality. More specifically, it satisfies: 0.5 < R1 / f1 < 0.7. For example, 0.51 ≤ R1 / f1 ≤ 0.67.

[0056] In this exemplary embodiment, the conditional expression satisfied by the radius of curvature R4 of the image side surface of the second lens, the radius of curvature R5 of the object side surface of the third lens, and the radius of curvature R6 of the image side surface of the third lens is: 0 < R4 / (R5 + R6) < 1.0. By reasonably controlling the ratio of the radius of curvature of the image side surface of the second lens to the sum of the radii of curvature of the object side surface and the image side surface of the third lens within a certain interval, the axial aberrations generated by the imaging optical system can be effectively balanced. More specifically, it satisfies: 0.2 < R4 / (R5 + R6) < 0.8. For example, 0.27 ≤ R4 / (R5 + R6) ≤ 0.71.

[0057] In this exemplary embodiment, the conditional expression satisfied by the central thickness CT2 of the second lens on the optical axis and the edge thickness ET2 of the second lens is: 0.4 < CT2 / ET2 < 0.9. Reasonably controlling the ratio range of CT2 and ET2 can reduce the processing difficulty of the lens, and at the same time reduce the angle between the chief ray incident on the image plane and the optical axis, and improve the relative illumination of the image plane. More specifically, it satisfies: 0.5 < CT2 / ET2 < 0.8. For example, 0.52 ≤ CT2 / ET2 ≤ 0.76.

[0058] In this exemplary embodiment, the conditional expression satisfied by the edge thickness ET3 of the third lens and the central thickness CT3 of the third lens on the optical axis is: 0.5 < ET3 / CT3 < 1.0. Reasonably controlling the ratio range of CT3 and ET3 can reduce the processing and assembly difficulty. More specifically, it satisfies: 0.7 < ET3 / CT3 < 0.95. For example, 0.71 ≤ ET3 / CT3 ≤ 0.92.

[0059] In this exemplary embodiment, the conditional expression satisfied by the axial distance SAG22 between the intersection of the image side surface of the second lens and the optical axis and the vertex of the effective radius of the image side surface of the second lens and the axial distance SAG11 between the intersection of the object side surface of the first lens and the optical axis and the vertex of the effective radius of the object side surface of the first lens is: 0.3 < SAG22 / SAG11 < 0.8. Reasonably allocating the ratio of the axial distance between the intersection of the image side surface of the second lens and the optical axis and the vertex of the effective radius of the image side surface of the second lens to the axial distance between the intersection of the object side surface of the first lens and the optical axis and the vertex of the effective radius of the object side surface of the first lens can reasonably control the main ray deflection angle, improve the matching degree with the chip, and is beneficial to adjusting the structure of the optical system. More specifically, it satisfies: 0.4 < SAG22 / SAG11 < 0.7. For example, 0.47 ≤ SAG22 / SAG11 ≤ 0.64.

[0060] In this exemplary embodiment, the first lens has a positive optical power, and its object side surface is convex; the second lens has a negative optical power, and its image side surface is concave; the third lens has a positive optical power, and its object side surface is convex and its image side surface is concave. Reasonably allocating the optical power of the system helps to improve chromatic aberration and can adjust the light focusing position, enhancing the light converging ability of the lens.

[0061] In this exemplary embodiment, the second lens is a glass lens, and both its object side surface and image side surface are aspherical surfaces. This enables the optical system to have a better ability to balance chromatic aberration and distortion.

[0062] In this exemplary embodiment, the third lens is a glass lens, and both its object side surface and image side surface are spherical surfaces. This reduces the processing difficulty and at the same time makes the assembly of the optical system have higher stability.

[0063] In this exemplary embodiment, the above optical imaging lens may further include a diaphragm. The diaphragm can be set at an appropriate position as needed. For example, the diaphragm can be set between the object side and the first lens. Optionally, the above optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0064] The optical imaging lens according to the above embodiment of the present invention can adopt multiple lenses, such as the three lenses described above. By reasonably allocating the optical power, surface type, central thickness of each lens, and the axial spacing between each lens, etc., the optical imaging lens has a large imaging image plane, has the characteristics of a wide imaging range and high imaging quality, and ensures the ultra-thinness of the mobile phone.

[0065] In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side surface of the first lens to the image side surface of the third lens is an aspherical mirror surface. The characteristics of an aspherical lens are: the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side surface and the image side surface of each lens in the first lens, the second lens and the third lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each lens in the first lens, the second lens and the third lens are all aspherical mirror surfaces.

[0066] 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 optical camera lens can be changed to obtain the various results and advantages described in this specification. For example, although three lenses are used as an example in the embodiments, the optical camera lens is not limited to including three lenses, and the optical camera lens may also include other numbers of lenses if necessary.

[0067] Specific embodiments of the optical camera lens applicable to the above embodiments will be further described below with reference to the accompanying drawings. Specific embodiment 1

[0069] Figure 1 Schematic diagram of the lens group structure of Embodiment 1 of the optical camera lens of the present invention. The optical camera lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a filter E4 and an imaging surface S9.

[0070] The first lens E1 has positive power, its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has negative power, its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has positive power, its object side surface S5 is convex, and its image side surface S6 is concave. The filter E4 has an object side surface S7 and an image side surface S8. The light from the object passes through each surface of the surface S1 to S8 in sequence and is finally imaged on the imaging surface S9.

[0071] As shown in Table 1, it is a basic parameter table of the optical camera lens of Example 1, wherein the units of the radius of curvature, thickness and focal length are all millimeters (mm).

[0072] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless S1(STO) Aspheric 4.2017 2.0951 6.94 1.55 56.1 -0.0189 S2 Aspheric -32.1504 0.1969 -17.1616 S3 Aspheric -67.8842 0.8500 -5.50 1.69 31.2 0.0000 S4 Aspheric 4.0625 2.0497 0.1567 S5 Spherical 6.5336 0.5739 28.29 1.93 20.9 S6 Spherical 8.3141 17.4376 S7 Spherical endless 0.2100 1.52 64.2 S8 Spherical endless 0.5839 S9 Spherical endless 0.0030 OBJ Spherical endless endless

[0073] Table 1

[0074] As shown in Table 2, in Example 1, the total effective focal length of the optical camera lens is f=27.10 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S9 is 24.00 mm, half of the diagonal length of the effective pixel area on the imaging surface S9 is ImgH=2.56 mm, and half of the maximum field of view of the optical imaging system is Semi-FOV=5.4°.

[0075]

[0076] Table 2

[0077] The optical camera lens in Example 1 satisfies:

[0078] TTL / f=0.89, where TTL is the distance from the object side of the first lens of the optical camera lens to the imaging surface on the optical axis, and f is the effective focal length of the optical camera lens;

[0079] BFL / TTL=0.76, where BFL is the distance from the image side of the last lens of the optical camera lens to the imaging plane on the optical axis, and TTL is the distance from the object side of the first lens of the optical camera lens to the imaging plane on the optical axis;

[0080] Nmax=1.93, where Nmax is the maximum value of the refractive index of the three lenses;

[0081] V1-V3=35.25, where V1 is the dispersion coefficient of the first lens and V3 is the dispersion coefficient of the third lens;

[0082] (N1+N2) / N3=1.68, where N1 is the refractive index of the first lens, N2 is the refractive index of the second lens, and N3 is the refractive index of the third lens;

[0083] (f3+f2) / (f3-f2)=0.67, where f3 is the effective focal length of the third lens, and f2 is the effective focal length of the second lens;

[0084] R1 / f1=0.61, where R1 is the radius of curvature of the object side of the first lens, and f1 is the effective focal length of the first lens;

[0085] R4 / (R5+R6)=0.27, where R4 is the radius of curvature of the image side of the second lens, R5 is the radius of curvature of the object side of the third lens, and R6 is the radius of curvature of the image side of the third lens;

[0086] CT2 / ET2=0.52, where CT2 is the center thickness of the second lens on the optical axis, and ET2 is the edge thickness of the second lens;

[0087] ET3 / CT3=0.78, where ET3 is the edge thickness of the third lens, and CT3 is the center thickness of the third lens on the optical axis;

[0088] SAG22 / SAG11=0.62, where SAG22 is the on-axis distance between the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens, and SAG11 is the on-axis distance between the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens.

[0089] In Embodiment 1, the object side surface and the image side surface of any lens among the first lens E1 to the second lens E2 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0090]

[0091] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1); k is the cone coefficient; Ai is the correction coefficient of the i-th order aspheric surface.

[0092] In Example 1, the object side surface and the image side surface of any one of the first lens E1 to the second lens E2 are aspherical surfaces. Table 3 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S4 that can be used in Example 1. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 and A 18 .

[0093] Face number A4 A6 A8 A10 A12 A14 A16 A18 S1 -1.1009E-01 -1.8773E-02 -5.2634E-03 -1.9908E-03 -9.2361E-04 -4.9066E-04 -2.6722E-04 -8.4188E-05 S2 3.5512E-02 -4.8726E-03 -5.2950E-03 -4.6059E-04 -7.9763E-04 -2.2508E-04 -4.0540E-06 6.8681E-05 S3 1.4052E-01 -1.3116E-02 -6.1256E-05 -1.7809E-04 -1.9645E-04 -7.8860E-05 3.2213E-05 1.8344E-05 S4 1.0654E-01 -3.7456E-03 7.4563E-04 -8.5440E-05 4.1972E-06 -6.8243E-06 1.7046E-05 -1.0351E-05

[0094] Table 3

[0095] Figure 2a The axial chromatic aberration curve of the optical camera lens of Example 1 is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the lens. Figure 2b The astigmatism curve of the optical imaging lens of Example 1 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 2c The distortion curve of the optical camera lens of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 2d The chromatic aberration curve of the optical camera lens of Example 1 is shown, which indicates the deviation of different image heights on the imaging surface after the light passes through the lens. Figure 2a to Figure 2dIt can be seen from the figure that the optical camera lens provided in Example 1 can achieve good imaging quality. Specific embodiment 2

[0097] Figure 3 Schematic diagram of the lens group structure of the optical camera lens embodiment 2 of the present invention. The optical camera lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a filter E4 and an imaging surface S9.

[0098] The first lens E1 has positive power, its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has negative power, its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has positive power, its object side surface S5 is convex, and its image side surface S6 is concave. The filter E4 has an object side surface S7 and an image side surface S8. The light from the object passes through each surface of the surface S1 to S8 in sequence and is finally imaged on the imaging surface S9.

[0099] As shown in Table 4, it is a basic parameter table of the optical camera lens of Example 2, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0100] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless S1(STO) Aspheric 4.6923 2.2000 7.09 1.55 56.1 0.0546 S2 Aspheric -18.5623 0.2148 -21.3059 S3 Aspheric -14.8006 2.2000 -5.13 1.69 31.1 0.0000 S4 Aspheric 4.9768 1.6630 0.4241 S5 Spherical 5.5028 0.5063 24.76 2.02 21.0 S6 Spherical 6.7164 16.0523 S7 Spherical endless 0.2100 1.52 64.2 S8 Spherical endless 0.7506 S9 Spherical endless 0.0030 OBJ Spherical endless endless

[0101] Table 4

[0102] As shown in Table 5, in Example 2, the total effective focal length of the optical camera lens is f=27.30 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S9 on the optical axis is 23.80 mm, half of the diagonal length of the effective pixel area on the imaging surface S9 is ImgH=2.56 mm, and half of the maximum field angle of the optical imaging system is Semi-FOV=5.3°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0103]

[0104] Table 5

[0105] In Example 2, the object side surface and the image side surface of any one of the first lens E1 to the second lens E2 are aspherical surfaces. Table 6 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S4 that can be used in Example 2. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 and A 18 .

[0106] Face number A4 A6 A8 A10 A12 A14 A16 A18 S1 -7.9698E-02 -1.1680E-02 -1.9408E-03 -1.4173E-04 -9.0803E-06 -2.2263E-04 -6.5664E-05 -8.0569E-06 S2 4.1322E-02 -3.9683E-03 -8.1099E-06 7.0924E-04 -9.5306E-04 -6.9610E-04 4.6353E-04 -7.0740E-05 S3 1.5086E-01 -7.8135E-03 9.9166E-04 7.1528E-04 -3.0035E-04 -4.5158E-04 2.3466E-04 -2.9364E-05 S4 1.2041E-01 1.7019E-03 4.2445E-04 9.2615E-06 -4.4685E-05 3.1024E-06 2.8208E-05 3.2783E-06

[0107] Table 6

[0108] Figure 4a The axial chromatic aberration curve of the optical camera lens of Example 2 is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the lens. Figure 4b The astigmatism curve of the optical imaging lens of Example 2 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 4c The distortion curve of the optical camera lens of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 4d The chromatic aberration curve of the optical camera lens of Example 2 is shown, which indicates the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 4a to 4d It can be seen from the figure that the optical camera lens provided in Example 2 can achieve good imaging quality. Specific embodiment 3

[0110] Figure 5 Schematic diagram of the lens group structure of the optical camera lens embodiment 3 of the present invention. The optical camera lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a filter E4 and an imaging surface S9.

[0111] The first lens E1 has positive power, its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has negative power, its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has positive power, its object side surface S5 is convex, and its image side surface S6 is concave. The filter E4 has an object side surface S7 and an image side surface S8. The light from the object passes through each surface of the surface S1 to S8 in sequence and is finally imaged on the imaging surface S9.

[0112] As shown in Table 7, it is a basic parameter table of the optical camera lens of Example 3, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0113]

[0114]

[0115] Table 7

[0116] As shown in Table 8, in Example 3, the total effective focal length of the optical camera lens is f=27.30 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S9 on the optical axis is 23.80 mm, half of the diagonal length of the effective pixel area on the imaging surface S9 is ImgH=2.56 mm, and half of the maximum field angle of the optical imaging system is Semi-FOV=5.3°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0117]

[0118] Table 8

[0119] In Example 3, the object side surface and the image side surface of any one of the first lens E1 to the second lens E2 are both aspherical surfaces. Table 9 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S4 that can be used in Example 3. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 and A 18 .

[0120] Face number A4 A6 A8 A10 A12 A14 A16 A18 S1 -8.0565E-02 -1.2266E-02 -2.1605E-03 -2.0897E-04 -4.7287E-05 -2.5878E-04 -7.2180E-05 -2.0520E-06 S2 3.9691E-02 -4.4833E-03 -2.5223E-04 6.1394E-04 -9.5658E-04 -6.8900E-04 4.8328E-04 -7.6651E-05 S3 1.5195E-01 -7.6967E-03 9.3549E-04 6.6511E-04 -3.1594E-04 -4.3960E-04 2.4204E-04 -3.1517E-05 S4 1.1980E-01 1.6730E-03 3.9393E-04 2.2467E-05 -3.8544E-05 1.3321E-05 2.4323E-05 6.1694E-06

[0121] Table 9

[0122] Figure 6a The axial chromatic aberration curve of the optical camera lens of Example 3 is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the lens. Figure 6b The astigmatism curve of the optical imaging lens of Example 3 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 6c The distortion curve of the optical camera lens of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 6d The chromatic aberration curve of the optical camera lens of Example 3 is shown, which indicates the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 6a to 6d It can be seen from the figure that the optical camera lens provided in Example 3 can achieve good imaging quality. Specific embodiment 4

[0124] Figure 7 Schematic diagram of the lens group structure of the optical camera lens embodiment 4 of the present invention. The optical camera lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a filter E4 and an imaging surface S9.

[0125] The first lens E1 has positive power, its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has positive power, its object side surface S5 is convex, and its image side surface S6 is concave. The filter E4 has an object side surface S7 and an image side surface S8. The light from the object passes through each surface of the surface S1 to S8 in sequence and is finally imaged on the imaging surface S9.

[0126] As shown in Table 10, it is a basic parameter table of the optical camera lens of Example 4, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0127] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless S1(STO) Aspheric 4.4903 1.9414 8.79 1.55 56.1 0.0451 S2 Aspheric 58.6199 0.2648 -99.0000 S3 Aspheric -60.9440 1.9281 -8.54 1.69 31.2 0.0000 S4 Aspheric 6.6529 7.0705 1.1833 S5 Spherical 4.7508 0.5637 151.21 1.93 20.9 S6 Spherical 4.6348 11.7714 S7 Spherical endless 0.2100 1.52 64.2 S8 Spherical endless 0.0470 S9 Spherical endless 0.0030 OBJ Spherical endless endless

[0128] Table 10

[0129] As shown in Table 11, in Example 4, the total effective focal length of the optical camera lens is f=27.30 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S9 on the optical axis is 23.80 mm, half of the diagonal length of the effective pixel area on the imaging surface S9 is ImgH=2.56 mm, and half of the maximum field angle of the optical imaging system is Semi-FOV=5.3°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0130]

[0131] Table 11

[0132] In Example 4, the object side surface and the image side surface of any one of the first lens E1 to the second lens E2 are aspherical surfaces. Table 12 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S4 that can be used in Example 4. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 and A 18 .

[0133]

[0134]

[0135] Table 12

[0136] Figure 8a The axial chromatic aberration curve of the optical camera lens of Example 4 is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the lens. Figure 8b The astigmatism curve of the optical imaging lens of Example 4 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 8c The distortion curve of the optical camera lens of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 8d The chromatic aberration curve of the optical camera lens of Example 4 is shown, which indicates the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 8a to 8d It can be seen from the figure that the optical camera lens provided in Example 4 can achieve good imaging quality. Specific embodiment 5

[0138] Fig. 9 Schematic diagram of the lens group structure of the optical camera lens embodiment 5 of the present invention. The optical camera lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a filter E4 and an imaging surface S9.

[0139] The first lens E1 has positive power, its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, its object side surface S5 is convex, and its image side surface S6 is concave. The filter E4 has an object side surface S7 and an image side surface S8. The light from the object passes through each surface S1 to S8 in sequence and is finally imaged on the imaging surface S9.

[0140] As shown in Table 13, it is a basic parameter table of the optical camera lens of Example 5, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0141] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless S1(STO) Aspheric 4.4105 1.7272 8.73 1.55 56.1 0.0400 S2 Aspheric 50.7290 0.1176 -73.1911 S3 Aspheric 55.6759 1.7598 -8.65 1.69 31.2 0.0000 S4 Aspheric 5.3502 7.9401 0.3537 S5 Spherical 5.4976 0.8566 222.43 1.93 20.9 S6 Spherical 5.2224 10.9962 S7 Spherical endless 0.2100 1.52 64.2 S8 Spherical endless 0.1897 S9 Spherical endless 0.0030 OBJ Spherical endless endless

[0142] Table 13

[0143] As shown in Table 14, in Example 5, the total effective focal length of the optical camera lens is f=27.30 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S9 on the optical axis is 23.80 mm, half of the diagonal length of the effective pixel area on the imaging surface S9 is ImgH=2.56 mm, and half of the maximum field angle of the optical imaging system is Semi-FOV=5.3°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0144]

[0145] Table 14

[0146] In Example 5, the object side surface and the image side surface of any one of the first lens E1 to the second lens E2 are aspherical surfaces. Table 15 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S4 that can be used in Example 5. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 and A 18 .

[0147] Face number A4 A6 A8 A10 A12 A14 A16 A18 S1 -8.5783E-02 -1.3656E-02 -2.8775E-03 -5.4925E-04 -2.6622E-04 -3.5279E-04 -1.2809E-04 -1.2624E-05 S2 3.3186E-03 -3.0691E-03 1.0331E-03 3.8195E-04 -1.1971E-03 -6.6907E-04 5.2113E-04 -8.7909E-05 S3 8.9557E-02 -4.9832E-03 1.4278E-03 7.8568E-04 -2.9042E-04 -4.7431E-04 2.3795E-04 -2.8281E-05 S4 1.2021E-01 3.8493E-03 7.0546E-04 6.2747E-05 -3.4641E-05 4.7560E-07 1.4576E-05 -3.2611E-06

[0148] Table 15

[0149] Fig.10a The axial chromatic aberration curve of the optical camera lens of Example 5 is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the lens. Fig.10b The astigmatism curve of the optical imaging lens of Example 5 is shown, which indicates the meridional field curvature and the sagittal field curvature. Fig.10c The distortion curve of the optical camera lens of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.10d The magnification chromatic aberration curve of the optical camera lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 10a to 10d It can be seen from the figure that the optical camera lens provided in Example 5 can achieve good imaging quality. Specific embodiment 6

[0151] Fig.11 Schematic diagram of the lens group structure of the optical camera lens embodiment 6 of the present invention. The optical camera lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a filter E4 and an imaging surface S9.

[0152] The first lens E1 has positive power, its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, its object side surface S5 is convex, and its image side surface S6 is concave. The filter E4 has an object side surface S7 and an image side surface S8. The light from the object passes through each surface S1 to S8 in sequence and is finally imaged on the imaging surface S9.

[0153] As shown in Table 16, it is a basic parameter table of the optical camera lens of Example 6, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0154] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless S1(STO) Aspheric 4.2604 1.6875 8.40 1.55 56.1 -0.0013 S2 Aspheric 51.0244 0.1042 -29.6845 S3 Aspheric 50.2647 1.8462 -7.80 1.69 31.2 -99.0000 S4 Aspheric 4.8119 6.0657 0.3201 S5 Spherical 5.0334 0.8125 129.48 1.93 20.9 S6 Spherical 4.8429 13.0239 S7 Spherical endless 0.2100 1.52 64.2 S8 Spherical endless 0.2470 S9 Spherical endless 0.0030 OBJ Spherical endless endless

[0155] Table 16

[0156] As shown in Table 17, in Example 6, the total effective focal length of the optical camera lens is f=28.20 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S9 on the optical axis is 24.00 mm, half of the diagonal length of the effective pixel area on the imaging surface S9 is ImgH=2.56 mm, and half of the maximum field angle of the optical imaging system is Semi-FOV=5.2°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0157]

[0158] Table 17

[0159] In Example 6, the object side surface and the image side surface of any one of the first lens E1 to the second lens E2 are both aspherical surfaces. Table 18 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S4 that can be used in Example 6. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 and A 18 .

[0160] Face number A4 A6 A8 A10 A12 A14 A16 A18 S1 -9.1773E-02 -1.8150E-02 -5.4206E-03 -1.9470E-03 -6.8714E-04 -3.9586E-04 -1.3013E-04 -2.3646E-05 S2 -1.6119E-02 -2.3886E-03 -2.9973E-03 1.3536E-04 -2.1535E-04 -5.8307E-04 3.6495E-04 -7.1008E-05 S3 1.0982E-01 -3.5667E-03 8.3512E-05 8.0222E-04 3.3250E-06 -2.2740E-04 3.5485E-04 -7.2348E-05 S4 1.1810E-01 4.8921E-03 6.8910E-04 1.1327E-04 -1.9290E-06 4.5472E-06 2.2909E-06 -5.3079E-07

[0161] Table 18

[0162] Fig.12a The axial chromatic aberration curve of the optical camera lens of Example 6 is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the lens. Figure 12b The astigmatism curve of the optical imaging lens of Example 6 is shown, which indicates the meridional field curvature and the sagittal field curvature. Fig.12c The distortion curve of the optical camera lens of Example 6 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.12d The magnification chromatic aberration curve of the optical camera lens of Example 6 is shown, which indicates the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 12a to 12d It can be seen from the figure that the optical camera lens provided in Example 6 can achieve good imaging quality. Specific embodiment 7

[0164] Fig.13 Schematic diagram of the lens group structure of Embodiment 7 of the optical camera lens of the present invention. The optical camera lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a filter E4 and an imaging surface S9.

[0165] The first lens E1 has positive power, its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has negative power, its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, its object side surface S5 is convex, and its image side surface S6 is concave. The filter E4 has an object side surface S7 and an image side surface S8. The light from the object passes through each surface S1 to S8 in sequence and is finally imaged on the imaging surface S9.

[0166] As shown in Table 19, it is a basic parameter table of the optical camera lens of Example 7, wherein the units of the radius of curvature, thickness, and focal length are all millimeters (mm).

[0167] Face number Surface type Radius of curvature Thickness / distance focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless S1(STO) Aspheric 4.2404 2.2000 7.37 1.55 56.1 -0.0210 S2 Aspheric -66.2121 0.1285 99.0000 S3 Aspheric 51.5126 0.8661 -6.34 1.69 31.2 -99.0000 S4 Aspheric 4.0293 3.7597 0.1413 S5 Spherical 6.3616 1.1935 50.24 1.93 20.9 S6 Spherical 6.6938 15.3926 S7 Spherical endless 0.2100 1.52 64.2 S8 Spherical endless 0.2465 S9 Spherical endless 0.0030 OBJ Spherical endless endless

[0168] Table 22

[0169] As shown in Table 20, in Example 7, the total effective focal length of the optical camera lens is f=27.60 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S9 on the optical axis is 24.00 mm, half of the diagonal length of the effective pixel area on the imaging surface S9 is ImgH=2.56 mm, and half of the maximum field angle of the optical imaging system is Semi-FOV=5.3°. The parameters of each relational expression are as explained in the first embodiment, and the values ​​of each relational expression are listed in the following table.

[0170]

[0171]

[0172] Table 20

[0173] In Example 7, the object side surface and the image side surface of any one of the first lens E1 to the second lens E2 are both aspherical surfaces. Table 21 shows the high-order coefficients A of the aspherical mirror surfaces S1 to S4 that can be used in Example 7. 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 and A 18 .

[0174] Face number A4 A6 A8 A10 A12 A14 A16 A18 S1 -1.1053E-01 -2.0085E-02 -4.9542E-03 -1.2358E-03 -4.1274E-04 -2.7865E-04 -1.6151E-04 -3.8218E-05 S2 2.2957E-02 -9.4865E-03 -2.4016E-03 -5.5322E-04 -8.9814E-04 -6.3264E-04 4.7002E-04 -6.0175E-05 S3 1.3100E-01 -1.2965E-02 9.6194E-04 -1.0222E-03 -6.2960E-04 -3.8676E-04 5.7321E-04 -5.2803E-05 S4 1.0223E-01 -4.5785E-04 1.0165E-03 -1.3913E-04 -3.1454E-05 -1.1156E-04 4.2880E-05 8.2393E-06

[0175] Table 21

[0176] Fig.14a The axial chromatic aberration curve of the optical camera lens of Example 7 is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the lens. Fig.14b The astigmatism curve of the optical imaging lens of Example 7 is shown, which indicates the meridional field curvature and the sagittal field curvature. Fig.14c The distortion curve of the optical camera lens of Example 7 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.14d The magnification chromatic aberration curve of the optical camera lens of Example 7 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 14a to 14d It can be seen from the figure that the optical camera lens provided in Example 7 can achieve good imaging quality.

[0177] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, improvements, equivalent substitutions, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical camera lens, It is characterized in that The optical camera lens has three lenses with optical power, and the optical camera lens includes, in order from the object side to the image side along the optical axis: A first lens having positive optical power, whose object side surface is convex; A second lens having negative optical power, whose image side surface is concave; The third lens has positive power, its object side surface is convex and its image side surface is concave; At least one lens is a glass lens; Among them, the distance TTL from the object side of the first lens of the optical camera lens to the imaging plane on the optical axis and the effective focal length f of the optical camera lens satisfy: 0.85≤TTL / f<0.9; the distance BFL from the image side of the last lens of the optical camera lens to the imaging plane on the optical axis and the distance TTL from the object side of the first lens of the optical camera lens to the imaging plane on the optical axis satisfy: 0.48≤BFL / TTL≤0.

76.

2. The optical camera lens according to claim 1, Features: The maximum value Nmax among the refractive indices of the three lenses satisfies: 1.93≤Nmax≤2.

02.

3. The optical camera lens according to claim 1, Features: The dispersion coefficient V1 of the first lens and the dispersion coefficient V3 of the third lens satisfy: 35.14≤V1-V3≤35.

25.

4. The optical camera lens according to claim 1, Features: A refractive index N1 of the first lens, a refractive index N2 of the second lens, and a refractive index N3 of the third lens satisfy: 1.61≤(N1+N2) / N3≤1.

68.

5. The optical camera lens according to claim 1, Features: The effective focal length f3 of the third lens and the effective focal length f2 of the second lens satisfy: 0.65≤(f3+f2) / (f3-f2)≤0.

93.

6. The optical camera lens according to claim 1, Features: The curvature radius R1 of the object side surface of the first lens and the effective focal length f1 of the first lens satisfy: 0.51≤R1 / f1≤0.

67.

7. The optical camera lens according to claim 1, Features: The curvature radius R4 of the image side surface of the second lens, the curvature radius R5 of the object side surface of the third lens, and the curvature radius R6 of the image side surface of the third lens satisfy: 0.27≤R4 / (R5+R6)≤0.

71.

8. The optical camera lens according to claim 1, Features: A center thickness CT2 of the second lens on the optical axis and an edge thickness ET2 of the second lens satisfy: 0.52≤CT2 / ET2≤0.

76.

9. The optical camera lens according to claim 1, Features: The edge thickness ET3 of the third lens and the center thickness CT3 of the third lens on the optical axis satisfy: 0.71≤ET3 / CT3≤0.

92.

10. The optical camera lens according to claim 1, Features: The on-axis distance SAG22 between the intersection of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens and the on-axis distance SAG11 between the intersection of the object side surface of the first lens and the optical axis to the effective radius vertex of the object side surface of the first lens satisfy: 0.47≤SAG22 / SAG11≤0.

64.

11. The optical camera lens according to claim 1, Features: The second lens is a glass lens, and both the object side surface and the image side surface thereof are aspherical surfaces.

12. The optical camera lens according to claim 1, Features: The third lens is a glass lens, and both the object side surface and the image side surface thereof are spherical surfaces.

Images