Optical camera lens and lens assembly

Abstract

The present invention relates to the field of optical lenses. Disclosed are an optical camera lens and a lens assembly. The optical camera lens sequentially comprises seven lenses in total from an object side to an image side: a first lens with a positive refractive power, a second lens with a negative refractive power, a third lens with a negative refractive power, a fourth lens with a positive refractive power, a fifth lens with a negative refractive power, a sixth lens with a positive refractive power, and a seventh lens with a negative refractive power; and the distortion of the optical camera lens at a 1.0 field of view is DIST1.0H, the distortion of the optical camera lens at a 0.8 field of view is DIST0.8H, the distortion of the optical camera lens at a 0.6 field of view is DIST0.6H, the distortion of the optical camera lens at a 0.5 field of view is DIST0.5H, and the distortion of the optical camera lens at a 0.3 field of view is DIST0.3H. The combined focal length of the first lens, the second lens, the third lens, the fourth lens and the fifth lens is f12345; and the combined focal length of the sixth lens and the seventh lens is f67. The following relational expressions are satisfied: 0.40≤(DIST0.8H-DIST0.5H) / (DIST0.5H-DIST0.3H)≤1.60; -0.13≤(DIST1.0H-DIST0.8H) / (DIST0.8H-DIST0.6H)≤2.50; and 0.25≤f12345 / f67≤2.40.

Description

Camera lens and lens assembly TECHNICAL FIELD

[0001] The present application relates to the field of optical lens, in particular to a camera lens and lens assembly suitable for smart phones, digital cameras and other portable terminal devices, as well as surveillance cameras, PC lenses, vehicle-mounted lenses and other camera devices. BACKGROUND

[0002] In recent years, with the rise of various intelligent devices, the demand for small camera lenses is increasing, and due to the reduction of the pixel size of the photosensitive device, combined with the current trend of electronic products being light and thin, the small camera lens with good imaging quality has become the mainstream in the market. In order to obtain better imaging quality, multi-piece lens structure is often used. With the development of technology and the increasing of user's diversified needs, under the condition of continuous reduction of the pixel area of the photosensitive device and the increasing requirement of the system for imaging quality, seven-piece lens structure gradually appears in the lens design. There is an urgent need for wide-angle camera lenses and lens assemblies with excellent optical characteristics, good processing properties and fully corrected aberrations. TECHNICAL PROBLEM

[0003] In view of the above problems, the purpose of the present application is to provide a camera lens which has good optical performance and meets the design requirements of small aberration, high image quality, easy processing and convenient post-image distortion adjustment. TECHNICAL SOLUTION

[0004] To achieve the above purpose, the technical scheme of the present application provides a camera lens, which comprises seven lenses, and the seven lenses are arranged in order from the object side to the image side as follows: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power.

[0005] The object side surface of the first lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the second lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the third lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the fourth lens is convex at the near axis, and the image side surface is convex at the near axis; the image side surface of the fifth lens is concave at the near axis; the object side surface of the sixth lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the seventh lens is convex at the near axis, and the image side surface is concave at the near axis.

[0006] Wherein, the distortion of the camera lens at 1.0 field of view is DIST1.0H the distortion at 0.8 field of view is DIST 0.8H the distortion at 0.6 field of view is DIST 0.6H the distortion at 0.5 field of view is DIST 0.5H the distortion at 0.3 field of view is DIST 0.3H a combined focal length of the first lens, the second lens, the third lens, the fourth lens, the fifth lens is f12345, a combined focal length of the sixth lens and the seventh lens is f67, a central radius of curvature of the object side surface of the seventh lens at the paraxial region is R13, a central radius of curvature of the image side surface of the seventh lens at the paraxial region is R14, an Abbe number of the first lens is v1, a central radius of curvature of the object side surface of the third lens at the paraxial region is R5, a central radius of curvature of the image side surface of the third lens at the paraxial region is R6, a focal length of the photographing optical lens is f, an entrance pupil diameter of the photographing optical lens is ENPD, a field of view at 1.0 field of view of the photographing optical lens is FOV, and the following relationships are met:

[0007] 0.40≤(DIST 0.8H -DIST 0.5H ) / (DIST 0.5H -DIST 0.3H )≤1.60;

[0008] -0.13≤(DIST 1.0H -DIST 0.8H ) / (DIST 0.8H -DIST 0.6H )≤2.50;

[0009] 0.25≤f12345 / f67≤2.40;

[0010] 1.60≤R13 / R14≤3.80;

[0011] 80.00≤v1≤82.00;

[0012] 4.00≤(R5+R6) / f≤9.00;

[0013] 0.05≤ENPD / FOV≤0.07.

[0014] Preferably, the following relationships are met:

[0015] 0.40≤(DIST 0.8H -DIST 0.5H ) / (DIST 0.5H -DIST 0.3H )≤1.40.

[0016] Preferably, the following relation is satisfied:

[0017] -0.12≤(DIST 1.0H -DIST 0.8H ) / (DIST 0.8H -DIST 0.6H )≤2.10.

[0018] Preferably, the following relation is satisfied: 0.25≤f12345 / f67≤2.10.

[0019] Preferably, the following relation is satisfied: 2.00≤R13 / R14≤3.20.

[0020] Preferably, the following relation is satisfied: 5.00≤(R5+R6) / f≤7.80.

[0021] Preferably, the maximum optical radius of the object side surface of the third lens is SD31, the sag at the maximum optical radius of the object side surface of the third lens is SAG31, the maximum optical radius of the object side surface of the first lens is SD11, the sag at the maximum optical radius of the object side surface of the first lens is SAG11, the central curvature radius of the object side surface of the first lens at the near axis is R1, the central curvature radius of the object side surface of the third lens at the near axis is R5, and the following relation is satisfied: -6.60≤(SAG31 / SD31*R5) / (SAG11 / SD11*R1)≤ -1.40.

[0022] Preferably, the following relation is satisfied:

[0023] -5.80≤(SAG31 / SD31*R5) / (SAG11 / SD11*R1)≤-1.70.

[0024] Preferably, the on-axis thickness of the first lens is d1, the on-axis thickness of the second lens is d3, the on-axis thickness of the seventh lens is d13, and the following relation is satisfied: 1.45≤(d1+d3+d13) / d1≤2.25.

[0025] Preferably, the following relation is satisfied: 1.63≤(d1+d3+d13) / d1≤2.02.

[0026] Preferably, the first lens is made of glass.

[0027] The technical scheme of the present application also provides a camera optical lens, which comprises seven lenses in sequence from an object side to an image side, i.e., a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power.

[0028] The object side surface of the first lens is convex at a near axis, and the image side surface is concave at the near axis; the object side surface of the second lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the third lens is convex at the near axis, and the image side surface is concave at the near axis; the object side surface of the fourth lens is convex at the near axis, and the image side surface is convex at the near axis; the image side surface of the fifth lens is concave at the near axis; the object side surface of the sixth lens is convex at the near axis, and the image side surface is concave at the near axis; and the object side surface of the seventh lens is convex at the near axis, and the image side surface is concave at the near axis.

[0029] The distortion of the camera optical lens at 1.0 field of view is DIST 1.0H , the distortion at 0.8 field of view is DIST 0.8H , the distortion at 0.6 field of view is DIST 0.6H , the distortion at 0.5 field of view is DIST 0.5H , the distortion at 0.3 field of view is DIST 0.3H , the combined focal length of the first lens, the second lens, the third lens, the fourth lens and the fifth lens is f12345, the combined focal length of the sixth lens and the seventh lens is f67, the central curvature radius of the object side surface of the first lens at the near axis is R1, the central curvature radius of the image side surface of the first lens at the near axis is R2, the central curvature radius of the object side surface of the second lens at the near axis is R3, the central curvature radius of the image side surface of the second lens at the near axis is R4, the central curvature radius of the object side surface of the sixth lens at the near axis is R11, the central curvature radius of the image side surface of the sixth lens at the near axis is R12, and the following relationship is satisfied:

[0030] 0.40≤(DIST 0.8H -DIST 0.5H ) / (DIST 0.5H -DIST 0.3H )≤1.60;

[0031] -0.13≤(DIST 1.0H -DIST 0.8H ) / (DIST 0.8H -DIST 0.6H )≤2.50;

[0032] 0.25≤f12345 / f67≤2.40;

[0033] -2.50≤(R1+R2) / (R1-R2)≤-1.50;

[0034] 7.00≤(R3+R4) / (R3-R4)≤10.00;

[0035] 0.30≤R11 / R12≤0.40。

[0036] Preferably, the following relationship is satisfied:

[0037] 0.40≤(DIST 0.8H -DIST 0.5H ) / (DIST 0.5H -DIST 0.3H )≤1.40.

[0038] Preferably, the following relationship is satisfied:

[0039] -0.12≤(DIST 1.0H -DIST 0.8H ) / (DIST 0.8H -DIST 0.6H )≤2.10.

[0040] Preferably, the following relationship is satisfied: 0.25≤f12345 / f67≤2.10.

[0041] Preferably, the following relationship is satisfied: -2.10≤(R1+R2) / (R1-R2)≤-1.90.

[0042] Preferably, the following relationship is satisfied: 7.80≤(R3+R4) / (R3-R4)≤9.20.

[0043] Preferably, the sum of the lengths of the air gaps between any two adjacent lenses among the first lens to the seventh lens on the optical axis is ∑d, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.25≤∑d / TTL≤0.37.

[0044] Preferably, the following relationship is satisfied: 0.28≤∑d / TTL≤0.33.

[0045] Preferably, the first lens is made of glass.

[0046] The technical solution of the present application also provides a lens assembly, which comprises the camera optical lens as described above, and specifically comprises a first lens barrel accommodating the first lens and a second lens barrel accommodating the second lens to the seventh lens.

[0047] Preferably, the first lens barrel comprises a first top surface close to the object side, the second lens barrel comprises a second top surface close to the object side, the object side surface of the first lens protrudes towards the object side beyond the first top surface, the distance between the first top surface and the center of the object side surface of the first lens along the optical axis is B1, the distance between the second top surface and the center of the object side surface of the first lens along the optical axis is B2, the center curvature radius of the object side surface of the first lens at the near axis is R1, the focal length of the first lens is f1, and the following relationship is satisfied: 0.80≤(B1 / B2)*(f1 / R1)≤1.50. Advantages

[0048] The camera optical lens according to the present application has excellent optical characteristics, small aberration, high image quality, good processability, and the characteristics of being convenient for post-image distortion adjustment, and is especially suitable for mobile phone camera lens assemblies, WEB camera lenses, and vehicle-mounted lenses composed of high-pixel CCD, CMOS, and other camera elements. BRIEF DESCRIPTION OF DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0050] Fig. 1 is a structural schematic diagram of a camera optical lens according to a first embodiment of the present application;

[0051] Fig. 2 is an axial aberration schematic diagram of the camera optical lens shown in Fig. 1;

[0052] Fig. 3 is a magnification chromatic aberration schematic diagram of the camera optical lens shown in Fig. 1;

[0053] Fig. 4 is a field curvature and distortion schematic diagram of the camera optical lens shown in Fig. 1;

[0054] Fig. 5 is a structural schematic diagram of a camera optical lens according to a second embodiment of the present application;

[0055] Fig. 6 is an axial aberration schematic diagram of the camera optical lens shown in Fig. 5;

[0056] Fig. 7 is a magnification chromatic aberration schematic diagram of the camera optical lens shown in Fig. 5;

[0057] Fig. 8 is a field curvature and distortion schematic diagram of the camera optical lens shown in Fig. 5;

[0058] Fig. 9 is a structural schematic diagram of a camera optical lens according to a third embodiment of the present application;

[0059] Fig. 10 is a schematic diagram of axial aberration of the photographing optical lens shown in Fig. 9;

[0060] Fig. 11 is a schematic diagram of lateral chromatic aberration of the photographing optical lens shown in Fig. 9;

[0061] Fig. 12 is a schematic diagram of field curvature and distortion of the photographing optical lens shown in Fig. 9;

[0062] Fig. 13 is a schematic diagram of the structure of a photographing optical lens according to a fourth embodiment of the present application;

[0063] Fig. 14 is a schematic diagram of axial aberration of the photographing optical lens shown in Fig. 13;

[0064] Fig. 15 is a schematic diagram of lateral chromatic aberration of the photographing optical lens shown in Fig. 13;

[0065] Fig. 16 is a schematic diagram of field curvature and distortion of the photographing optical lens shown in Fig. 13;

[0066] Fig. 17 is a schematic diagram of the structure of a lens assembly according to the present application. Embodiments of the present application

[0067] In order to make the objects, technical solutions, and advantages of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art can understand that, in the embodiments of the present application, many technical details are presented in order to make the readers better understand the present application. However, the technical solutions claimed by the present application can be implemented even without these technical details and based on various changes and modifications of the following embodiments.

[0068] With reference to Figs. 1-16, the technical solutions of the present application provide a photographing optical lens 10, 20, 30, 40. Figs. 1, 5, 9, 13 show the photographing optical lens 10, 20, 30, 40 of the present application, which comprises seven lenses in total. Specifically, the photographing optical lens comprises, in order from the object side to the image side: an aperture S1, 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. An optical element such as a filter GF can be arranged between the seventh lens L7 and the image plane Si.

[0069] Referring to FIG. 17, the technical scheme of the present application further provides a lens assembly 100, which comprises a lens barrel 110 and any above-mentioned camera optical lens accommodated in the lens barrel 110, the lens barrel 110 comprising a first lens barrel 101 and a second lens barrel 102, which can be integrally formed or separately formed. Specifically, the first lens barrel 101 accommodates the first lens L1, and the second lens barrel 102 accommodates the second lens L2 to the seventh lens L7. The first lens barrel 101 comprises a first top surface 1011 close to the object side, the second lens barrel 102 comprises a second top surface 1021 close to the object side, the object side surface of the first lens L1 protrudes from the first top surface 1011 towards the object side, the distance between the first top surface 1011 and the center L1X of the object side surface of the first lens L1 along the optical axis X is B1, the distance between the second top surface 1021 and the center L1X of the object side surface of the first lens L1 along the optical axis X is B2, the center curvature radius of the object side surface of the first lens L1 at the near axis is R1, and the focal length of the first lens L1 is f1, which satisfy the following relationship: 0.80≤(B1 / B2)*(f1 / R1)≤1.50.

[0070] The first lens L1 is made of glass, the second lens L2 is made of plastic, the third lens L3 is made of plastic, the fourth lens L4 is made of plastic, the fifth lens L5 is made of plastic, the sixth lens L6 is made of plastic, and the seventh lens L7 is made of plastic. The combination of glass and resin lenses can reduce chromatic aberration and improve the performance of the optical camera lens. Each lens can also be made of other materials.

[0071] The object side surface and the image side surface of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 are aspherical surfaces.

[0072] The object side surface of the first lens L1 is convex at the near axis, the image side surface is concave at the near axis, and the first lens L1 has positive refractive power. The object side surface and the image side surface of the first lens L1 can also be arranged in other concave and convex distribution.

[0073] The object side surface of the second lens L2 is convex at the near axis, the image side surface is concave at the near axis, and the first lens L2 has negative refractive power. The object side surface and the image side surface of the first lens L2 can also be arranged in other concave and convex distribution.

[0074] The object side surface of the third lens L3 is convex at the near axis, the image side surface is convex at the near axis, and the third lens L3 has negative refractive power. The object side surface and the image side surface of the third lens L3 can also be arranged in other concave and convex distribution.

[0075] The object side surface of the fourth lens L4 is convex at the paraxial region, the image side surface of the fourth lens L4 is convex at the paraxial region, and the fourth lens L4 has positive refractive power. The object side surface and the image side surface of the fourth lens L4 can also be provided with other concave and convex distribution conditions.

[0076] The object side surface of the fifth lens L5 is convex or concave at the paraxial region, the image side surface of the fifth lens L5 is concave at the paraxial region, and the fifth lens L5 has negative refractive power. The object side surface and the image side surface of the fifth lens L5 can also be provided with other concave and convex distribution conditions.

[0077] The object side surface of the sixth lens L6 is convex at the paraxial region, the image side surface of the sixth lens L6 is concave at the paraxial region, and the sixth lens L6 has positive refractive power. The object side surface and the image side surface of the sixth lens L6 can also be provided with other concave and convex distribution conditions.

[0078] The object side surface of the seventh lens L7 is convex at the paraxial region, the image side surface of the seventh lens L7 is concave at the paraxial region, and the seventh lens L7 has negative refractive power. The object side surface and the image side surface of the seventh lens L7 can also be provided with other concave and convex distribution conditions.

[0079] The distortion of the camera optical lens at 0.8 field of view is defined as DIST 0.8H , the distortion at 0.3 field of view is defined as DIST 0.5H , and the distortion at 0.3 field of view is defined as DIST 0.3H , and the following relationship is satisfied: 0.40≤(DIST 0.8H -DIST 0.5H ) / (DIST 0.5H -DIST 0.3H )≤1.60, in the range of the relationship, the distortion curve is optimized, the distortion correction formula is easily matched in the later image processing, the distortion correction effect is improved, and the image distortion is reduced, wherein the distortion=(actual image height-ideal image height) / ideal image height*100%. Preferably, 0.40≤(DIST 0.8H -DIST 0.5H ) / (DIST 0.5H -DIST 0.3H )≤1.40.

[0080] The distortion of the camera optical lens at 1.0 field of view is defined as DIST 1.0H , the distortion at 0.8 field of view is defined as DIST 0.8H , and the distortion at 0.6 field of view is defined as DIST 0.6H , and the following relationship is satisfied: -0.13≤(DIST 1.0H -DIST 0.8H ) / (DIST 0.8H -DIST 0.6H)≤2.50, within the range of the relationship, it is beneficial to optimize the distortion curve, and in the later image processing, it is easy to match the distortion correction formula, improve the distortion correction effect, and reduce the image distortion. Preferably, -0.12≤(DIST 1.0H -DIST 0.8H ) / (DIST 0.8H -DIST 0.6H )≤2.10.

[0081] The combined focal length of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens is defined as f12345, and the combined focal length of the sixth lens and the seventh lens is defined as f67, and the following relationship is met: 0.25≤f12345 / f67≤2.40, within the range of the relationship, the ratio of the combined focal length of the sixth lens and the seventh lens to the combined focal length of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens is reasonably set, which is beneficial to the reasonable distribution of the refractive power of each lens in space and reduces the optical system aberration. Preferably, 0.25≤f12345 / f67≤2.10.

[0082] The central curvature radius of the object side surface of the seventh lens at the near axis is defined as R13, and the central curvature radius of the image side surface of the seventh lens at the near axis is defined as R14, and the following relationship is met: 1.60≤R13 / R14≤3.80, by controlling the ratio of the central curvature radius of the object side surface of the seventh lens at the near axis to the central curvature radius of the image side surface of the seventh lens at the near axis within the range, the machinability of the seventh lens can be ensured, the system aberration is reduced, and the image quality is improved. Preferably, 2.00≤R13 / R14≤3.20.

[0083] The Abbe number of the first lens is defined as v1, and the following relationship is met: 80.00≤v1≤82.00, by controlling the Abbe number of the first lens within the range, the purpose of controlling the overall chromatic aberration of the system is achieved. The application of such low refractive index and high Abbe number material in the design can achieve better performance of the camera lens by utilizing the characteristics of the material, thereby better meeting the market demand.

[0084] The central curvature radius of the object side surface of the third lens at the near axis is defined as R5, the central curvature radius of the image side surface of the third lens at the near axis is defined as R6, and the focal length of the camera optical lens is defined as f, and the following relationship is met: 4.00≤(R5+R6) / f≤9.00, the ratio of the sum of the central curvature radii of the object side surface and the image side surface of the third lens to the effective focal length of the camera optical lens is reasonably configured, which can make the optical imaging lens have a small enough relative color aberration, and ensure that the optical imaging lens is not prone to phenomena such as purple edge and yellow edge when shooting. Preferably, 5.00≤(R5+R6) / f≤7.80.

[0085] The entrance pupil diameter of the photographing optical lens is defined as ENPD, and the field of view of 1.0 of the photographing optical lens is defined as FOV, and the following relationship is satisfied: 0.05≤ENPD / FOV≤0.07. By limiting the ratio of ENPD and FOV within a reasonable range, a small FNO lens can be realized, and the light quantity is increased while the wide-angle requirement is met.

[0086] The maximum optical radius of the object side surface of the third lens is defined as SD31, the sag of the maximum optical radius of the object side surface of the third lens is defined as SAG31, the maximum optical radius of the object side surface of the first lens is defined as SD11, the sag of the maximum optical radius of the object side surface of the first lens is defined as SAG11, the central curvature radius of the object side surface of the first lens at the near axis is defined as R1, and the central curvature radius of the object side surface of the third lens at the near axis is defined as R5, and the following relationship is satisfied: -6.60≤(SAG31 / SD31*R5) / (SAG11 / SD11*R1)≤-1.40. Within the range of the relationship, the object side surface of the first lens and the object side surface of the third lens both have a relatively gentle surface shape, and the assembly sensitivity of the photographing optical lens is reduced. Preferably, -5.80≤(SAG31 / SD31*R5) / (SAG11 / SD11*R1)≤-1.70. Wherein, the maximum optical radius refers to the maximum radius reached by the MIC field of view light on the lens surface; the sag refers to the distance of the point on the surface to the surface center point on the optical axis in the direction of the optical axis, which is positive on the right side of the center point and negative on the left side of the center point.

[0087] The on-axis thickness of the first lens is defined as d1, the on-axis thickness of the second lens is defined as d3, and the on-axis thickness of the seventh lens is defined as d13, and the following relationship is satisfied: 1.45≤(d1+d3+d13) / d1≤2.25. Reasonably controlling the on-axis thicknesses of the first lens, the second lens and the seventh lens is conducive to realizing ultra-thin. Preferably, 1.63≤(d1+d3+d13) / d1≤2.02.

[0088] The central curvature radius of the object side surface of the first lens at the near axis is defined as R1, and the central curvature radius of the image side surface of the first lens at the near axis is defined as R2, and the following relationship is satisfied: -2.50≤(R1+R2) / (R1-R2)≤-1.50. Reasonably controlling the shape of the first lens can adjust the face shape and refractive power of the first lens, which is helpful to receive light with a larger angle of view. Preferably, -2.10≤(R1+R2) / (R1-R2)≤-1.90.

[0089] The center curvature radius of the second lens object side at the near axis is defined as R3, the center curvature radius of the second lens image side at the near axis is defined as R4, and the following relationship is satisfied: 7.00≤(R3+R4) / (R3-R4)≤10.00, which can ensure the machinability of the shape of the second lens and effectively control the aberration generated by the mobile camera module at the second lens. Preferably, 7.80≤(R3+R4) / (R3-R4)≤9.20.

[0090] The sum of the lengths of the air gaps between any two adjacent lenses among the first to seventh lenses on the optical axis is defined as ∑d, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.25≤∑d / TTL≤0.37, which can reasonably control the ratio of the sum of the air gaps between any two adjacent lenses on the optical axis to the total optical length, so as to realize the ultra-thin design. Preferably, 0.28≤∑d / TTL≤0.33.

[0091] Compared with the prior art, the camera optical lens provided by the application can realize the ultra-thin design by configuring 0.40≤(DIST 0.8H -DIST 0.5H ) / (DIST 0.5H -DIST 0.3H )≤1.60; -0.13≤(DIST 1.0H -DIST 0.8H ) / (DIST 0.8H -DIST 0.6H )≤2.50; 0.25≤f12345 / f67≤2.40; 1.60≤R13 / R14≤3.80; 80.00≤v1≤82.00; 4.00≤(R5+R6) / f≤9.00; 0.05≤ENPD / FOV≤0.07, which can optimize the distortion curve, easily match the distortion correction formula in the later image processing, improve the distortion correction effect, reduce the image distortion, facilitate the reasonable distribution of the refractive power of each lens in space, reduce the optical system aberration, ensure the machinability of the seventh lens, reduce the system aberration, and improve the image quality. In addition, the overall chromatic aberration of the system can be controlled, the performance of the camera lens can be further improved by using the characteristics of the material, the optical imaging lens can have a small enough magnification chromatic aberration, the optical imaging lens is not prone to have purple edges, yellow edges and other phenomena during shooting, a small FNO lens can be realized, the light amount is increased, and the wide-angle requirement is met.

[0092] In addition, compared with the prior art, the camera optical lens provided by the application can also realize the ultra-thin design by configuring 0.40≤(DIST 0.8H -DIST 0.5H ) / (DIST 0.5H -DIST 0.3H)≤1.60; -0.13≤(DIST 1.0H -DIST 0.8H ) / (DIST 0.8H -DIST 0.6H )≤2.50; 0.25≤f12345 / f67≤2.40; -2.50≤(R1+R2) / (R1-R2)≤-1.50; 7.00≤(R3+R4) / (R3-R4)≤10.00; 0.30≤R11 / R12≤0.40, the distortion curve can be optimized, in the later image processing, the distortion correction formula is easy to match, the distortion correction effect is improved, the image distortion is reduced; it is beneficial to the reasonable distribution of the refractive power of each lens in space, reduces the optical system aberration; can ensure the processability of the seventh lens, reduce the system aberration, and improve the image quality. In addition, it is also helpful to receive more large angle of view light; can ensure the processability of the shape of the second lens, can effectively control the aberration generated by the mobile camera module at the second lens; the sixth lens surface shape can cooperate with the fifth lens to correct off-axis aberration, while avoiding stray light at the image side, thereby improving the imaging surface illumination and imaging quality.

[0093] The camera optical lens of the present application will be described below with examples. The symbols described in each example are shown below. The units of focal length, on-axis distance, central curvature radius, and on-axis thickness are mm.

[0094] TTL: total optical length (on-axis distance from the object side of the first lens L1 to the image plane Si), unit: mm;

[0095] FNO: aperture value, which refers to the ratio of the effective focal length of the camera optical lens to the entrance pupil diameter.

[0096] Next, the technical solutions of the present application will be specifically described in four embodiments.

[0097] (First embodiment)

[0098] Table 1 and Table 2 show the design data of the camera optical lens 10 of the first embodiment of the present application.

[0099] [Table 1]

[0100] Wherein, the meanings of each symbol are as follows.

[0101] S1: aperture;

[0102] R: radius of curvature at the center of the optical surface;

[0103] R1: central radius of curvature of the object side of the first lens L1 at the near axis;

[0104] R2: central radius of curvature of the image side of the first lens L1 at the near axis;

[0105] R3: central radius of curvature of the object side surface of the second lens L2 at the paraxial region;

[0106] R4: central radius of curvature of the image side surface of the second lens L2 at the paraxial region;

[0107] R5: central radius of curvature of the object side surface of the third lens L3 at the paraxial region;

[0108] R6: central radius of curvature of the image side surface of the third lens L3 at the paraxial region;

[0109] R7: central radius of curvature of the object side surface of the fourth lens L4 at the paraxial region;

[0110] R8: central radius of curvature of the image side surface of the fourth lens L4 at the paraxial region;

[0111] R9: central radius of curvature of the object side surface of the fifth lens L5 at the paraxial region;

[0112] R10: central radius of curvature of the image side surface of the fifth lens L5 at the paraxial region;

[0113] R11: central radius of curvature of the object side surface of the sixth lens L6 at the paraxial region;

[0114] R12: central radius of curvature of the image side surface of the sixth lens L6 at the paraxial region;

[0115] R13: central radius of curvature of the object side surface of the seventh lens L7 at the paraxial region;

[0116] R14: central radius of curvature of the image side surface of the seventh lens L7 at the paraxial region;

[0117] R15: central radius of curvature of the object side surface of the optical filter GF at the paraxial region;

[0118] R16: central radius of curvature of the image side surface of the optical filter GF at the paraxial region;

[0119] d: on-axis thickness of the lens, on-axis distance between the lenses;

[0120] d0: on-axis distance from the stop S1 to the object side surface of the first lens L1;

[0121] d1: on-axis thickness of the first lens L1;

[0122] d2: on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

[0123] d3: on-axis thickness of the second lens L2;

[0124] d4: an on-axis distance from an image-side surface of the second lens L2 to an object-side surface of the third lens L3;

[0125] d5: an on-axis thickness of the third lens L3;

[0126] d6: an on-axis distance from an image-side surface of the third lens L3 to an object-side surface of the fourth lens L4;

[0127] d7: an on-axis thickness of the fourth lens L4;

[0128] d8: an on-axis distance from an image-side surface of the fourth lens L4 to an object-side surface of the fifth lens L5;

[0129] d9: an on-axis thickness of the fifth lens L5;

[0130] d10: an on-axis distance from an image-side surface of the fifth lens L5 to an object-side surface of the sixth lens L6;

[0131] d11: an on-axis thickness of the sixth lens L6;

[0132] d12: an on-axis distance from an image-side surface of the sixth lens L6 to an object-side surface of the seventh lens L7;

[0133] d13: an on-axis thickness of the seventh lens L7;

[0134] d14: an on-axis distance from an image-side surface of the seventh lens L7 to an object-side surface of the optical filter GF;

[0135] d15: an on-axis thickness of the optical filter GF;

[0136] d16: an on-axis distance from an image-side surface of the optical filter GF to an image plane Si;

[0137] nd: a refractive index of a d-line (the d-line is green light having a wavelength of 550 nm);

[0138] nd1: a refractive index of a d-line of the first lens L1;

[0139] nd2: a refractive index of a d-line of the second lens L2;

[0140] nd3: a refractive index of a d-line of the third lens L3;

[0141] nd4: a refractive index of a d-line of the fourth lens L4;

[0142] nd5: a refractive index of a d-line of the fifth lens L5;

[0143] nd6: a refractive index of a d-line of the sixth lens L6;

[0144] nd7: a refractive index of a d-line of the seventh lens L7;

[0145] ndg: Abbe number of the d-line of the optical filter GF;

[0146] vd: Abbe number;

[0147] v1: Abbe number of the first lens L1;

[0148] v2: Abbe number of the second lens L2;

[0149] v3: Abbe number of the third lens L3;

[0150] v4: Abbe number of the fourth lens L4;

[0151] v5: Abbe number of the fifth lens L5;

[0152] v6: Abbe number of the sixth lens L6;

[0153] v7: Abbe number of the seventh lens L7;

[0154] vg: Abbe number of the optical filter GF.

[0155] Table 2 shows aspherical surface data of each lens in the imaging optical lens 10 of the first embodiment of the present application.

[0156] [Table 2]

[0157] For convenience, the aspherical surface of each lens surface uses the aspherical surface shown in the following formula (1). However, the present application is not limited to the aspherical polynomial form represented by the formula (1). z = (cr 2 ) / {1 + [1 - (k + 1)(c 2 r 2 )] 1 / 2} + A4r 4 + A6r 6 + A8r 8 + A10r 10 + A12r 12 + A14 r 14 + A16r 16 + A18r 18 + A20r 20 + A22r 22 + A24r 24 + A26r 26 + A28r 28 + A30r 30 (1)

[0158] where k is a conic constant, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 are aspherical coefficients, c is a curvature at the center of the optical surface, r is a perpendicular distance of a point on the aspherical curve from the optical axis, and z is an aspherical depth (a perpendicular distance between a point on the aspherical curve at a distance r from the optical axis and a tangent plane at the vertex of the aspherical surface on the optical axis).

[0159] Fig. 2 and Fig. 3 respectively show axial chromatic aberration and lateral chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the camera optical lens 10 of the first embodiment. Fig. 4 shows field curvature and distortion of light with a wavelength of 555 nm after passing through the camera optical lens 10 of the first embodiment. The field curvature S of Fig. 4 is the sagittal field curvature, and the field curvature T is the tangential field curvature.

[0160] In the present embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 5.136 mm, the full field (1.0 field) image height IH is 8.000 mm, the full field (1.0 field) angle of view FOV in the diagonal direction is 85.58°, the MIC field image height IH is 8.250 mm, and the MIC field angle of view FOV in the diagonal direction is 87.71°. The camera optical lens 10 satisfies the design requirements of small aberration, high image quality, easy processing and convenient post-image distortion adjustment, and has excellent optical characteristics.

[0161] It can be understood that the 1.0 field image height refers to half the diagonal length of the effective pixel area of the sensor; the MIC field image height refers to the field height that is expanded outward than the 1.0 field image height for preventing assembly deviation; the 1.0 field angle of view in the diagonal direction refers to the field angle corresponding to the effective pixel area of the sensor; and the MIC field angle of view in the diagonal direction refers to the field angle corresponding to the MIC field image height.

[0162] (Second Embodiment)

[0163] The symbol meanings of the second embodiment are the same as those of the first embodiment.

[0164] Fig. 5 shows the camera optical lens 20 of the second embodiment of the present application.

[0165] Table 3 and Table 4 show the design data of the camera optical lens 20 of the second embodiment of the present application.

[0166]

Table 3

[0167] Table 4 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present application.

[0168] Table 4

[0169] Fig. 6, Fig. 7 respectively show the axial aberration and the lateral chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the imaging optical lens 20 of the second embodiment. Fig. 8 shows the field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 20 of the second embodiment. The field curvature S of Fig. 8 is the sagittal field curvature, and T is the tangential field curvature.

[0170] In the present embodiment, the entrance pupil diameter ENPD of the imaging optical lens 20 is 5.077 mm, the full field (1.0 field) image height IH is 8.000 mm, the full field (1.0 field) angle of view FOV in the diagonal direction is 83.00°, the MIC field image height IH is 8.290 mm, the MIC field angle of view FOV in the diagonal direction is 84.97°, the imaging optical lens 20 meets the design requirements of small aberration, high image quality, easy processing and convenient post-image distortion adjustment, the on-axis and off-axis chromatic aberration is fully corrected, and has excellent optical characteristics.

[0171] (third embodiment)

[0172] The symbol meanings of the third embodiment are the same as those of the first embodiment.

[0173] Fig. 9 shows the imaging optical lens 30 of the third embodiment of the present application.

[0174] Table 5, Table 6 show the design data of the imaging optical lens 30 of the third embodiment of the present application.

[0175] Table 5

[0176] Table 6 shows the aspheric surface data of each lens in the imaging optical lens 30 of the third embodiment of the present application.

[0177] Table 6

[0178] Fig. 10, Fig. 11 respectively show the axial aberration and the lateral chromatic aberration of light with wavelengths of 655 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm after passing through the imaging optical lens 30 of the third embodiment. Fig. 12 shows the field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 30 of the third embodiment. The field curvature S of Fig. 12 is the sagittal field curvature, and T is the tangential field curvature.

[0179] In the embodiment, the entrance pupil diameter ENPD of the photographing optical lens 30 is 5.140 mm, the full field (1.0 field) image height IH is 8.000 mm, the full field (1.0 field) diagonal direction field of view FOV is 85.10°, the MIC field image height IH is 8.290 mm, the MIC field diagonal direction field of view FOV is 87.14°, the photographing optical lens 30 meets the design requirements of small aberration, high image quality, easy processing and convenient post-image distortion adjustment, the on-axis and off-axis chromatic aberrations are fully corrected, and excellent optical characteristics are achieved.

[0180] (Fourth Embodiment)

[0181] The symbol meanings of the fourth embodiment are the same as those of the first embodiment.

[0182] FIG. 13 shows the photographing optical lens 40 of the fourth embodiment of the present application.

[0183] Tables 7 and 8 show the design data of the photographing optical lens 40 of the fourth embodiment of the present application.

[0184] [Table 7]

[0185] Table 8 shows the aspheric surface data of each lens in the photographing optical lens 40 of the fourth embodiment of the present application.

[0186] [Table 8]

[0187] FIGS. 14 and 15 respectively show the axial aberration and the magnification chromatic aberration diagrams of light with wavelengths of 655 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm after passing through the photographing optical lens 40 of the fourth embodiment. FIG. 16 shows the field curvature and distortion diagrams of light with a wavelength of 555 nm after passing through the photographing optical lens 40 of the fourth embodiment. The field curvature S of FIG. 16 is the sagittal direction field curvature, and T is the tangential direction field curvature.

[0188] In the embodiment, the entrance pupil diameter ENPD of the photographing optical lens 40 is 5.069 mm, the full field (1.0 field) image height IH is 8.000 mm, the full field (1.0 field) diagonal direction field of view FOV is 85.79°, the MIC field image height IH is 8.290 mm, the MIC field diagonal direction field of view FOV is 87.91°, the photographing optical lens 40 meets the design requirements of small aberration, high image quality, easy processing and convenient post-image distortion adjustment, the on-axis and off-axis chromatic aberrations are fully corrected, and excellent optical characteristics are achieved.

[0189] Table 9

[0190] It will be appreciated by those skilled in the art that the above embodiments are merely illustrative of the principles of the application and that various modifications can be made by those skilled in the art without departing from the spirit and scope of the application.

Claims

1. A camera optical lens, characterized in that: The camera optical lens comprises a total of seven lenses, and the seven lenses are, in order from the object side to the image side: a first lens having positive refractive power, a second lens having negative refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power, and a seventh lens having negative refractive power; The object side surface of the first lens is convex at the paraxial position, and the image side surface is concave at the paraxial position; the object side surface of the second lens is convex at the paraxial position, and the image side surface is concave at the paraxial position; the object side surface of the third lens is convex at the paraxial position, and the image side surface is concave at the paraxial position; the object side surface of the fourth lens is convex at the paraxial position, and the image side surface is convex at the paraxial position; the image side surface of the fifth lens is concave at the paraxial position; the object side surface of the sixth lens is convex at the paraxial position, and the image side surface is concave at the paraxial position; the object side surface of the seventh lens is convex at the paraxial position, and the image side surface is concave at the paraxial position; The distortion of the camera optical lens at 1.0 field of view is DIST 1.0H , the distortion at 0.8 field of view is DIST 0.8H , the distortion at 0.6 field of view is DIST 0.6H , the distortion at 0.5 field of view is DIST 0.5H , the distortion at 0.3 field of view is DIST 0.3H The combined focal length of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens is f12345, the combined focal length of the sixth lens and the seventh lens is f67, the central curvature radius of the object side of the seventh lens at the paraxial position is R13, the central curvature radius of the image side of the seventh lens at the paraxial position is R14, the Abbe number of the first lens is v1, the central curvature radius of the object side of the third lens at the paraxial position is R5, the central curvature radius of the image side of the third lens at the paraxial position is R6, and the imaging light The focal length of the optical lens is f, the entrance pupil diameter of the camera optical lens is ENPD, the field of view angle of 1.0 field of view of the camera optical lens is FOV, and the following relationship is satisfied: 0.40≤(DIST 0.8H -DIST 0.5H ) / (DIST 0.5H -DIST 0.3H )≤1.60; -0.13≤(DIST 1.0H -DIST 0.8H ) / (DIST 0.8H -DIST 0.6H )≤2.50; 0.25≤f12345 / f67≤2.40; 1.60≤R13 / R14≤3.80; 80.00≤v1≤82.00； 4.00≤(R5+R6) / f≤9.00; 0.05≤ENPD / FOV≤0.

07.

2. The imaging optical lens according to claim 1, wherein: Satisfy the following relationship: 0.40≤(DIST 0.8H -DIST 0.5H ) / (DIST 0.5H -DIST 0.3H )≤1.

40.

3. The imaging optical lens according to claim 1, wherein: The following relationship is satisfied: -0.12≤(DIST 1.0H -DIST 0.8H ) / (DIST 0.8H -DIST 0.6H )≤2.

10.

4. The imaging optical lens according to claim 1, wherein: The following relationship is satisfied: 0.25≤f12345 / f67≤2.

10.

5. The imaging optical lens according to claim 1, wherein: The following relationship is satisfied: 2.00≤R13 / R14≤3.

20.

6. The imaging optical lens according to claim 1, wherein: The following relationship is satisfied: 5.00≤(R5+R6) / f≤7.

80.

7. The imaging optical lens according to claim 1, wherein: The maximum optical radius of the objective side of the third lens is SD31, the sag at the maximum optical radius of the objective side of the third lens is SAG31, the maximum optical radius of the objective side of the first lens is SD11, the sag at the maximum optical radius of the objective side of the first lens is SAG11, the central curvature radius of the objective side of the first lens at the paraxial position is R1, and the central curvature radius of the objective side of the third lens at the paraxial position is R5, satisfying the following relationship: -6.60≤(SAG31 / SD31*R5) / (SAG11 / SD11*R1)≤-1.

40.

8. The imaging optical lens according to claim 7, wherein: The following relationship is satisfied: -5.80≤(SAG31 / SD31*R5) / (SAG11 / SD11*R1)≤-1.

70.

9. The imaging optical lens according to claim 1, wherein: The on-axis thickness of the first lens is d1, the on-axis thickness of the second lens is d3, and the on-axis thickness of the seventh lens is d13, and the following relationship is satisfied: 1.45≤(d1+d3+d13) / d1≤2.

25.

10. The imaging optical lens according to claim 9, wherein: The following relationship is satisfied: 1.63≤(d1+d3+d13) / d1≤2.

02.

11. The imaging optical lens according to claim 1, wherein: The first lens is made of glass.

12. A camera optical lens, characterized in that: The camera optical lens comprises a total of seven lenses, and the seven lenses are, in order from the object side to the image side: a first lens having positive refractive power, a second lens having negative refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power, and a seventh lens having negative refractive power; The object side surface of the first lens is convex at the paraxial position, and the image side surface is concave at the paraxial position; the object side surface of the second lens is convex at the paraxial position, and the image side surface is concave at the paraxial position; the object side surface of the third lens is convex at the paraxial position, and the image side surface is concave at the paraxial position; the object side surface of the fourth lens is convex at the paraxial position, and the image side surface is convex at the paraxial position; the image side surface of the fifth lens is concave at the paraxial position; the object side surface of the sixth lens is convex at the paraxial position, and the image side surface is concave at the paraxial position; the object side surface of the seventh lens is convex at the paraxial position, and the image side surface is concave at the paraxial position; The distortion of the camera optical lens at 1.0 field of view is DIST 1.0H , the distortion at 0.8 field of view is DIST 0.8H , the distortion at 0.6 field of view is DIST 0.6H , the distortion at 0.5 field of view is DIST 0.5H , the distortion at 0.3 field of view is DIST 0.3H , the combined focal length of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens is f12345, the combined focal length of the sixth lens and the seventh lens is f67, the central curvature radius of the object side surface of the first lens at the paraxial position is R1, the central curvature radius of the image side surface of the first lens at the paraxial position is R2, the central curvature radius of the object side surface of the second lens at the paraxial position is R3, the central curvature radius of the image side surface of the second lens at the paraxial position is R4, the central curvature radius of the object side surface of the sixth lens at the paraxial position is R11, and the central curvature radius of the image side surface of the sixth lens at the paraxial position is R12, and the following relationship is satisfied: 0.40≤(DIST 0.8H -DIST 0.5H ) / (DIST 0.5H -DIST 0.3H )≤1.60; -0.13≤(DIST 1.0H -DIST 0.8H ) / (DIST 0.8H -DIST 0.6H )≤2.50; 0.25≤f12345 / f67≤2.40; -2.50≤(R1+R2) / (R1-R2)≤-1.50; 7.00≤(R3+R4) / (R3-R4)≤10.00; 0.30≤R11 / R12≤0.

40.

13. The imaging optical lens according to claim 12, wherein: Satisfy the following relationship: 0.40≤(DIST 0.8H -DIST 0.5H ) / (DIST 0.5H -DIST 0.3H )≤1.

40.

14. The imaging optical lens according to claim 12, wherein: The following relationship is satisfied: -0.12≤(DIST 1.0H -DIST 0.8H ) / (DIST 0.8H -DIST 0.6H )≤2.

10.

15. The imaging optical lens according to claim 12, wherein: The following relationship is satisfied: 0.25≤f12345 / f67≤2.

10.

16. The imaging optical lens according to claim 12, wherein: The following relationship is satisfied: -2.10≤(R1+R2) / (R1-R2)≤-1.

90.

17. The imaging optical lens according to claim 12, wherein: The following relationship is satisfied: 7.80≤(R3+R4) / (R3-R4)≤9.

20.

18. The imaging optical lens according to claim 12, wherein: The sum of the lengths of the air spaces between any two adjacent lenses from the first lens to the seventh lens on the optical axis is ∑d, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.25≤∑d / TTL≤0.

37.

19. The imaging optical lens according to claim 18, wherein: The following relationship is satisfied: 0.28≤∑d / TTL≤0.

33.

20. The imaging optical lens according to claim 12, wherein: The first lens is made of glass.

21. A lens assembly comprising the camera optical lens according to any one of claims 1 to 20, characterized in that: The invention comprises a first lens barrel for accommodating the first lens and a second lens barrel for accommodating the second lens to the seventh lens.

22. The lens assembly according to claim 21, wherein: The first lens barrel includes a first surface near the object side, the second lens barrel includes a second surface near the object side, the object side surface of the first lens partially protrudes beyond the first surface toward the object side, the distance between the first surface and the center of the object side surface of the first lens along the optical axis is B1, the distance between the second surface and the center of the object side surface of the first lens along the optical axis is B2, the central curvature radius of the object side surface of the first lens at the paraxial position is R1, the focal length of the first lens is f1, and the following relationship is satisfied: 0.80≤(B1 / B2)*(f1 / R1)≤1.50.

Images