camera lens

Abstract

This invention relates to the field of optical lenses and discloses a camera lens. The camera lens, from the object side to the image side, is composed of a first lens with negative refractive power, a second lens with positive refractive power, a third lens, a fourth lens with negative refractive power, a fifth lens with positive refractive power, a sixth lens, and a seventh lens with negative refractive power whose image side is a freeform surface. The focal length of the camera lens is f, the focal length of the second lens is f2, the focal length of the third lens is f3, and the focal length of the fourth lens is f4. The axial distance from the object side of the first lens to the image side of the second lens is D12, and the axial distance from the object side of the second lens to the image side of the third lens is D23, satisfying the following relationships: |f2 / f3|≤0.07; -0.50≤f2 / f4≤-0.30; 0.58≤D12 / f≤0.64; 0.35≤D23 / f≤0.45. The present invention can provide a camera lens with |TV_D|<1.0%, good optical characteristics, 2ω>110° and wide angle, and composed of seven lenses.

Description

Technical Field

[0001] This invention relates to a camera lens. In particular, it relates to a camera lens that is suitable for camera components of smartphones, web cameras, etc., that use high-pixel CCD, CMOS, or other imaging elements, has a wide-angle field of view (hereinafter referred to as 2ω) of 110° or more, a |TV distortion (hereinafter referred to as |TV_D|) of less than 1.0%, has good optical characteristics, and is composed of seven lenses. Background Technology

[0002] In recent years, among various imaging devices using imaging elements such as CCD and CMOS, there has been a search for a wide-angle camera lens with a small TV_D and good optical characteristics.

[0003] The development of a camera lens is underway that has a |TV_D| < 1.0%, good optical characteristics, a wide angle, and is composed of seven lenses. Patent Document 1 discloses a lens that, from the object side, is composed of a first lens with negative refractive power, a second lens with positive refractive power, a third lens, a fourth lens with negative refractive power, a fifth lens with positive refractive power, a sixth lens, and a seventh lens with negative refractive power.

[0004] Because the ratio of the focal length of the second lens to the third lens, the ratio of the focal length of the second lens to the fourth lens, and the ratio of the on-axis distance from the object side of the first lens to the image side of the second lens to the focal length of the entire camera lens disclosed in embodiments 1, 2, 4, and 7 of Patent Document 1 are insufficient, the distortion correction becomes insufficient, and |TV_D|>1.0%.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Chinese Patent Publication No. CN110221402A Summary of the Invention

[0008] The problem that the invention aims to solve

[0009] The purpose of this invention is to provide a camera lens with |TV_D|<1.0%, good optical characteristics, 2ω>110° and wide angle, and composed of seven lenses.

[0010] Methods for solving problems

[0011] To achieve the above objectives, the inventors of this invention carefully studied the ratio of the focal lengths of the second lens to the third lens, the ratio of the focal lengths of the second lens to the fourth lens, the ratio of the axial distance from the object side of the first lens to the image side of the second lens to the focal length of the entire camera lens, and the ratio of the axial distance from the object side of the second lens to the image side of the third lens to the focal length of the entire camera lens. Furthermore, by setting the image side of the seventh lens as a freeform surface, it was found that a camera lens that improves the problems of the prior art could be obtained, thus leading to the invention of this invention.

[0012] To solve the above-mentioned technical problems, an embodiment of the present invention provides a camera lens, which is composed of a first lens having negative refractive power, a second lens having positive refractive power, a third lens, a fourth lens having negative refractive power, a fifth lens having positive refractive power, a sixth lens, and a seventh lens having negative refractive power and whose image side is set as a free-form surface, from the object side to the image side.

[0013] Wherein, the focal length of the camera lens is f, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the axial distance from the object-side surface of the first lens to the image-side surface of the second lens is D12, the axial distance from the object-side surface of the second lens to the image-side surface of the third lens is D23, and the following relationship is satisfied:

[0014] |f2 / f3|≤0.07

[0015] -0.50 ≤ f2 / f4 ≤ -0.30

[0016] 0.58≤D12 / f≤0.64

[0017] 0.35≤D23 / f≤0.45

[0018] Preferably, the focal length of the seventh lens is f7, and it satisfies the following relationship:

[0019] -4.50 ≤ f7 / f ≤ -1.90

[0020] Preferably, the Abbe number of the first lens is ν1, the Abbe number of the second lens is ν2, and they satisfy the following relationship:

[0021] 0.90≤ν1 / ν2≤1.10

[0022] Preferably, the Abbe number of the third lens is ν3, the Abbe number of the second lens is ν2, and they satisfy the following relationship:

[0023] 0.90≤ν3 / ν2≤1.10

[0024] Invention Effects

[0025] The beneficial effects of this invention are as follows.

[0026] According to the present invention, a camera lens can be provided that is particularly suitable for camera components of smartphones, web cameras, etc., which use high-pixel CCD, CMOS and other imaging elements, has |TV_D|<1.0%, good optical characteristics, 2ω>110° and a wide angle, and is composed of seven lenses. Attached Figure Description

[0027] Figure 1 This is a diagram showing a schematic structure of the camera lens according to the first embodiment of the present invention.

[0028] Figure 2 This is a diagram showing the diameter of the RMS spot (RMS SPOT) within each image height of the camera lens according to the first embodiment of the present invention.

[0029] Figure 3 This is a diagram illustrating the distortion grid of a camera lens according to a first embodiment of the present invention.

[0030] Figure 4 This is a diagram showing a schematic structure of the camera lens according to the second embodiment of the present invention.

[0031] Figure 5 This is a diagram showing the RMS spot diameter within each image height of the camera lens according to the second embodiment of the present invention.

[0032] Figure 6 This is a diagram illustrating the distortion grid of a camera lens according to a second embodiment of the present invention.

[0033] Figure 7 This is a diagram showing a schematic structure of the camera lens according to the third embodiment of the present invention.

[0034] Figure 8 This is a diagram showing the RMS spot diameter within each image height of the camera lens according to the third embodiment of the present invention.

[0035] Figure 9 This is a diagram illustrating the distortion grid of a camera lens according to a third embodiment of the present invention.

[0036] Figure 10 This is a diagram illustrating TV distortion. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the various embodiments of this invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this invention to facilitate a better understanding of the invention. However, the technical solutions claimed in this invention can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0039] (First Implementation)

[0040] Please refer to the above. Figures 1 to 4 The present invention provides a camera lens 10 according to a first embodiment, in Figure 1 In the image sensor 10, the left side is the object side and the right side is the image side. The camera lens 10 has a seven-element lens system, in which the following lenses are arranged sequentially from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. A glass plate GF is disposed between the seventh lens L7 and the image plane Si. This glass plate GF can be assumed to include a glass cover and various filters. In this invention, the glass plate GF can be positioned in different locations or omitted entirely.

[0041] In this embodiment, the first lens L1 is a lens with negative refractive power, the second lens L2 is a lens with positive refractive power, the third lens L3 is a lens with refractive power, the fourth lens L4 is a lens with negative refractive power, the fifth lens L5 is a lens with positive refractive power, the sixth lens L6 is a lens with refractive power, and the seventh lens L7 is a lens with negative refractive power. To effectively correct each aberration, it is desirable that the entire surface of the object-side surface S1 of the first lens L1 to the object-side surface S13 of the seventh lens L7 be aspherical, and that the image-side surface S14 of the seventh lens L7 be a freeform surface.

[0042] The camera lens 10 satisfies the following relationship (1).

[0043] |f2 / f3|≤0.07 (1)

[0044] Equation (1) specifies the absolute value of the ratio of the focal length f2 of the second lens L2 to the focal length f3 of the third lens L3. Within the range of equation (1), it is easy to correct various aberrations and easy to achieve wide-angle conversion when |TV_D|<1.0%.

[0045] The camera lens 10 satisfies the following relationship (2).

[0046] -0.50≤f2 / f4≤-0.30 (2)

[0047] Equation (2) specifies the ratio of the focal length f2 of the second lens L2 to the focal length f4 of the fourth lens L4. Within the range of equation (2), it is easy to correct various aberrations and easy to achieve wide-angle conversion when |TV_D|<1.0%.

[0048] The camera lens 10 satisfies the following relationship (3).

[0049] 0.58≤D12 / f≤0.64 (3)

[0050] Equation (3) specifies the ratio of the axial distance D12 from the object side surface S1 of the first lens L1 to the image side surface S4 of the second lens to the focal length f of the entire camera lens 10. Within the range of equation (3), it is easy to correct various aberrations and easy to achieve wide-angle coverage when |TV_D|<1.0%.

[0051] The camera lens 10 satisfies the following relationship (4).

[0052] 0.35≤D23 / f≤0.45 (4)

[0053] Equation (4) specifies the ratio of the on-axis distance D23 from the object side surface S3 of the second lens L2 to the image side surface S6 of the third lens to the overall focal length f of the camera lens 10. Within the range of equation (4), it is easy to correct various aberrations and easy to achieve wide-angle coverage when |TV_D|<1.0%.

[0054] The camera lens 10 satisfies the following relationship (5).

[0055] -4.50≤f7 / f≤-1.90 (5)

[0056] Equation (5) specifies the ratio of the focal length f7 of the seventh lens L7 to the focal length f of the entire camera lens 10. Within the range of equation (5), it is easy to correct various aberrations and easy to achieve wide-angle coverage when |TV_D|<1.0%.

[0057] The camera lens 10 satisfies the following relationship (6).

[0058] 0.90≤ν1 / ν2≤1.10 (6)

[0059] Equation (6) specifies the ratio of the Abbe number ν1 of the first lens L1 to the Abbe number ν2 of the second lens L2. Within the range of equation (6), it is easy to correct various aberrations and easy to achieve wide-angle conversion when |TV_D|<1.0%.

[0060] The camera lens 10 satisfies the following relationship (7).

[0061] 0.90≤ν3 / ν2≤1.10 (7)

[0062] Equation (7) specifies the ratio of the Abbe number ν3 of the third lens L3 to the Abbe number ν2 of the second lens L2. Within the range of equation (7), it is easy to correct various aberrations and easy to achieve wide-angle conversion when |TV_D|<1.0%.

[0063] By having the seven lenses constituting the camera lens 10 satisfy the above-mentioned structure and relation, a camera lens can be obtained that has |TV_D|<1.0%, good optical characteristics, 2ω>110° and wide angle, and is composed of seven lenses.

[0064] The following describes the camera lens 10 of the present invention using examples. The symbols used in each example are shown below. It should be noted that the units for distance, radius, and on-axis thickness are mm.

[0065] f: Overall focal length of the camera lens

[0066] f1: Focal length of the first lens L1

[0067] f2: Focal length of the second lens L2

[0068] f3: Focal length of the third lens L3

[0069] f4: Focal length of the fourth lens L4

[0070] f5: Focal length of the fifth lens L5

[0071] f6: Focal length of the sixth lens L6

[0072] f7: Focal length of the seventh lens L7

[0073] Aperture value FNO: The ratio of the effective focal length to the entrance pupil diameter of a camera lens.

[0074] 2ω: Full View

[0075] STOP: Aperture

[0076] IH: Image height of the camera lens

[0077] R: Radius of the center curvature of the optical surface

[0078] R1: The central radius of curvature of the object-side surface S1 of the first lens L1.

[0079] R2: The central radius of curvature of the image-side surface S2 of the first lens L1.

[0080] R3: The central radius of curvature of the object-side surface S3 of the second lens L2.

[0081] R4: The central radius of curvature of the image-side surface S4 of the second lens L2.

[0082] R5: The central radius of curvature of the object surface S5 of the third lens L3.

[0083] R6: The central radius of curvature of the image-side surface S6 of the third lens L3.

[0084] R7: The central radius of curvature of the object surface S7 of the fourth lens L4.

[0085] R8: The central radius of curvature of the image-side surface S8 of the fourth lens L4.

[0086] R9: The central radius of curvature of the object surface S9 of the fifth lens L5.

[0087] R10: The central radius of curvature of the image-side surface S10 of the fifth lens L5.

[0088] R11: The central radius of curvature of the object surface S11 of the sixth lens L6.

[0089] R12: The central radius of curvature of the image-side surface S12 of the sixth lens L6.

[0090] R13: The central radius of curvature of the object surface S13 of the seventh lens L7.

[0091] R14: The central radius of curvature of the image-side surface S14 of the seventh lens L7.

[0092] R15: Radius of curvature at the center of the surface S15 of the glass plate GF.

[0093] R16: Radius of curvature at the center of the image-side surface S16 of the glass plate GF.

[0094] d: Axial thickness of the lens, or axial distance between lenses

[0095] d1: On-axis thickness of the first lens L1

[0096] d2: The axial distance from the image-side surface S2 of the first lens L1 to the aperture STOP.

[0097] d3: The axial distance from the aperture stop to the object-side surface S3 of the second lens L2.

[0098] d4: On-axis thickness of the second lens L2

[0099] d5: The axial distance from the image-side surface S4 of the second lens L2 to the object-side surface S5 of the third lens L3.

[0100] d6: On-axis thickness of the third lens L3

[0101] d7: The axial distance from the image-side surface S6 of the third lens L3 to the object-side surface S7 of the fourth lens L4.

[0102] d8: On-axis thickness of the fourth lens L4

[0103] d9: The axial distance from the image-side surface S8 of the fourth lens L4 to the object-side surface S9 of the fifth lens L5.

[0104] d10: On-axis thickness of the fifth lens L5

[0105] d11: The axial distance from the image-side surface S10 of the fifth lens L5 to the object-side surface S11 of the sixth lens L6.

[0106] d12: On-axis thickness of the sixth lens L6

[0107] d13: The axial distance from the image-side surface S12 of the sixth lens L6 to the object-side surface S13 of the seventh lens L7.

[0108] d14: On-axis thickness of the seventh lens L7

[0109] d15: The axial distance from the image-side surface S14 of the seventh lens L7 to the object-side surface S15 of the glass plate GF.

[0110] d16: Axial thickness of the glass plate GF

[0111] d17: The axial distance from the image-side surface S16 of the glass plate GF to the image plane.

[0112] D12: The axial distance from the object-side surface S1 of the first lens L1 to the image-side surface S4 of the second lens L2.

[0113] D23: The axial distance from the object-side surface S3 of the second lens L2 to the image-side surface S6 of the third lens L3.

[0114] nd: Refractive index of d-line

[0115] nd1: Refractive index of the d-line of the first lens L1

[0116] nd2: Refractive index of the d-line of the second lens L2

[0117] nd3: Refractive index of the d-line of the third lens L3

[0118] nd4: Refractive index of the d-line of the fourth lens L4

[0119] nd5: The refractive index of the d-line of the fifth lens L5

[0120] nd6: Refractive index of the d-line of the sixth lens L6

[0121] nd7: Refractive index of the d-line of the seventh lens L7

[0122] ndg: The refractive index of the d-line of the glass plate GF

[0123] νd: Abbe number

[0124] ν1: Abbe number of the first lens L1

[0125] ν2: Abbe number of the second lens L2

[0126] ν3: Abbe number of the third lens L3

[0127] ν4: Abbe number of the fourth lens L4

[0128] ν5: Abbe number of the fifth lens L5

[0129] ν6: Abbe number of the sixth lens L6

[0130] ν7: Abbe number of the seventh lens L7

[0131] νg: Abbe number of the glass plate GF

[0132] TTL: Total optical length (the on-axis distance from the object plane S1 of the first lens L1 to the image plane Si)

[0133] Figure 1 This is a structural diagram showing the configuration of the camera lens 10 according to the first embodiment. Table 1 shows the central radius of curvature R, lens axial thickness or inter-lens axial distance d, refractive index nd, and Abbe number ν of each object side and image side of the first lens L1 to the seventh lens L7 constituting the camera lens 10 of the first embodiment. Table 2 shows the conic coefficient k and aspherical coefficient of lens surfaces S1 to S13. Table 3 shows the conic coefficient k and freeform surface coefficient of lens surface S14. Table 4 shows 2ω, Fno, f, f1, f2, f3, f4, f5, f6, f7, TTL, and TV_D.

[0134] Table 1 shows the design data of the camera lens 10 according to the first embodiment of the present invention.

[0135] Table 1

[0136]

[0137]

[0138] Reference wavelength = 587.5618nm

[0139] Table 2 shows the aspherical data of the object-side and image-side surfaces of each of the first lens L1 to the sixth lens L6 of the camera lens 10 according to the first embodiment of the present invention, as well as the object-side surface of the seventh lens L7.

[0140] Table 2

[0141]

[0142]

[0143] z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A16r 16 +A18r 18 +A20r 20 (8)

[0144] Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, and A20 are aspheric coefficients, c is the curvature of the center of the optical surface, r is the perpendicular distance between a point on the aspheric curve and the optical axis, and z is the aspheric depth (the perpendicular distance between a point on the aspheric surface at a distance r from the optical axis and a tangent plane at the vertex of the aspheric optical axis).

[0145] For convenience, the aspherical surfaces of each lens surface are those shown in formula (8) above. However, the present invention is not particularly limited to the aspherical polynomial form represented by formula (8).

[0146] Table 3 shows the freeform surface data of the image side of the seventh lens L7 of the camera lens 10 according to the first embodiment of the present invention.

[0147] Table 3

[0148]

[0149]

[0150]

[0151] Where k is the conic coefficient, B i is the freeform surface coefficient, c is the curvature of the center of the optical surface, r is the perpendicular distance between a point on the freeform surface and the optical axis, x is the x-component of r, y is the y-component of r, and z is the aspherical depth (the perpendicular distance between a point on the aspherical surface at a distance r from the optical axis and the tangent plane tangent to the vertex on the aspherical optical axis).

[0152] For convenience, the freeform surface of the image-side surface S14 of the seventh lens L7 is the freeform surface shown in the above formula (9). However, the present invention is not particularly limited to the polynomial form represented by formula (9).

[0153] Table 4 shows the data of 2ω, Fno, f, f1, f2, f3, f4, f5, f6, f7, TTL, and TV_D of the camera lens 10 according to the first embodiment of the present invention.

[0154] Table 4

[0155]

[0156]

[0157] Table 13, which appears later, shows the values ​​corresponding to the various numerical values ​​and parameters specified in formulas (1) to (7) in each of the three implementation methods.

[0158] As shown in Table 13, the first embodiment satisfies the relations (1) to (7).

[0159] Figure 2 The diagram shows the RMS spot diameter within each image height of the camera lens 10 according to the first embodiment. Figure 3 The distorted grid is shown in the figure. It can be seen that the camera lens 10 of the first embodiment satisfies |TV_D|<1.0%, has good optical characteristics, and has a wide angle. It should be noted that... Figure 10 The diagram illustrates the method for calculating TV_D.

[0160] (Second Implementation)

[0161] Figure 4 This is a structural diagram showing the configuration of the camera lens 20 according to the second embodiment. The second embodiment is basically the same as the first embodiment, and the symbols have the same meanings as in the first embodiment. Only the differences are listed below.

[0162] Tables 5 and 6 show the design data of the camera lens 20 according to the second embodiment of the present invention.

[0163] Table 5 shows the central radius of curvature R, lens axial thickness or inter-lens axial distance d, refractive index nd, and Abbe number νd of each object side and image side of the camera lens 20 constituting the second embodiment. Table 6 shows the conic coefficient k and aspherical coefficient of lens surfaces S1 to S13. Table 7 shows the conic coefficient k and freeform surface coefficient of lens surface S14. Table 8 shows 2ω, Fno, f, f1, f2, f3, f4, f5, f6, f7, TTL, and TV_D.

[0164] Table 5

[0165]

[0166]

[0167] Reference wavelength = 587.5618nm

[0168] Table 6 shows the aspherical data of each lens in the camera lens 20 of the second embodiment of the present invention.

[0169] Table 6

[0170]

[0171]

[0172] Table 7 shows the freeform surface data of the image side of the seventh lens L7 of the camera lens 20 according to the second embodiment of the present invention.

[0173] Table 7

[0174]

[0175] Table 8 shows the data of 2ω, Fno, f, f1, f2, f3, f4, f5, f6, f7, TTL, and TV_D of the camera lens 20 according to the second embodiment of the present invention.

[0176] Table 8

[0177]

[0178]

[0179] As shown in Table 13, the second embodiment satisfies the relations (1) to (7).

[0180] Figure 5 The diagram shows the RMS spot diameter within each image height of the camera lens according to the second embodiment. Figure 6 The distortion grid is shown in the figure. It can be seen that the camera lens of the second embodiment satisfies |TV_D|<1.0%, has good optical characteristics, and has a wide angle.

[0181] (Third Implementation)

[0182] Figure 7 This is a structural diagram showing the configuration of the camera lens 30 according to the third embodiment. The third embodiment is basically the same as the first embodiment, and the symbols have the same meanings as in the first embodiment. Only the differences are listed below.

[0183] Tables 9 and 10 show the design data of the camera lens 30 according to the third embodiment of the present invention.

[0184] Table 9 shows the central radius of curvature R, lens axial thickness or inter-lens axial distance d, refractive index nd, and Abbe number νd of each object side and image side of the camera lens 30 constituting the third embodiment. Table 10 shows the conic coefficient k and aspherical coefficient of lens surfaces S1 to S13. Table 11 shows the conic coefficient k and freeform surface coefficient of lens surface S14. Table 12 shows 2ω, Fno, f, f1, f2, f3, f4, f5, f6, f7, TTL, and TV_D.

[0185] Table 9

[0186]

[0187] Reference wavelength = 587.5618nm

[0188] Table 10 shows the aspherical data of each lens in the camera lens 30 of the third embodiment of the present invention.

[0189] Table 10

[0190]

[0191]

[0192] Table 11 shows the freeform surface data of the image side of the seventh lens L7 of the camera lens 30 according to the third embodiment of the present invention.

[0193] Table 11

[0194]

[0195] Table 12 shows the data of 2ω, Fno, f, f1, f2, f3, f4, f5, f6, f7, TTL, and TV_D of the camera lens 30 according to the third embodiment of the present invention.

[0196] Table 12

[0197] 2ω(°) 112.6 Fno 2.24 f(mm) 3.461 f1(mm) -20.589 f2 (mm) 4.336 f3 (mm) 540.032 f4 (mm) -13.946 f5 (mm) 6.462 f6 (mm) 17.429 f7 (mm) -6.839 TTL(mm) 7.284 IH(mm) 5.200 TV_D(%) 0.89％

[0198] As shown in Table 13, the third embodiment satisfies the relations (1) to (7).

[0199] Figure 8 The diagram shows the RMS spot diameter within each image height of the camera lens 30 according to the third embodiment. Figure 9 The distortion grid is shown in the figure. It can be seen that the camera lens 30 of the third embodiment satisfies |TV_D|<1.0%, has good optical characteristics, and has a wide angle.

[0200] Table 13 shows the values ​​corresponding to the various numerical values ​​and parameters specified in equations (1) to (7) in each of the three implementation methods.

[0201] Table 13

[0202] First Implementation Method Second Implementation Method Third Implementation Method |f2 / f3| 0.008 0.065 0.008 f2 / f4 -0.311 -0.495 -0.311 D12 / f 0.633 0.590 0.616 D23 / f 0.442 0.372 0.414 f7 / f -2.944 -4.432 -1.976 ν1 / ν2 1.000 0.994 1.006 ν3 / ν2 1.000 0.994 1.006

[0203] Those skilled in the art will understand that the above embodiments are specific implementations of the present invention, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of the present invention.

Claims

1. An image capturing lens, characterized by, The camera lens is composed of, from the object side to the image side, a first lens with negative refractive power, a second lens with positive refractive power, a third lens, a fourth lens with negative refractive power, a fifth lens with positive refractive power, a sixth lens, and a seventh lens with negative refractive power and whose image side is a free-form surface. Wherein, the focal length of the camera lens is f, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the axial distance from the object-side surface of the first lens to the image-side surface of the second lens is D12, the axial distance from the object-side surface of the second lens to the image-side surface of the third lens is D23, and the following relationship is satisfied: |f2 / f3|≤0.07; -0.50≤f2 / f4≤-0.30; 0.58≤D12 / f≤0.64; 0.35≤D23 / f≤0.

45.

2. The camera lens according to claim 1, characterized in that, The seventh lens has a focal length of f7 and satisfies the following relationship: -4.50≤f7 / f≤-1.

90.

3. The camera lens according to claim 1, characterized in that, The Abbe number of the first lens is ν1, and the Abbe number of the second lens is ν2, and they satisfy the following relationship: 0.90≤ν1 / ν2≤1.

10.

4. The camera lens according to claim 1, characterized in that, The Abbe number of the third lens is ν3, and the Abbe number of the second lens is ν2, and they satisfy the following relationship: 0.90≤ν3 / ν2≤1.10.

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