Camera lens

Abstract

The application relates to the field of optical lenses and discloses a camera optical lens which comprises seven lenses and is sequentially arranged from the object side to the image side as follows: a first lens with positive refractive power, a second lens with positive 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; wherein the focal length of the camera optical lens is f, the field angle of the 1.0 field of view of the camera optical lens is FOV, the image height of the 1.0 field of view of the camera optical lens is IH, the total optical length of the camera optical lens is TTL, the axial distance from the image side surface of the third lens to the object side surface of the fourth lens is d6, the central curvature radius of the object side surface of the third lens is R5, the central curvature radius of the image side surface of the third lens is R6, the combined focal length of the first lens and the second lens is f12, and the following relations are met: 50.00 <= (FOVf) / (2IH) <= 57.00; 0.15 <= d6 / TTL <= 0.26; 1.50 <= R5 / R6 <= 3.30; 0.55 <= f12 / f <= 1.00.

Description

Technical Field

[0001] This invention relates to the field of optical lenses, and in particular to a camera optical lens suitable for handheld terminal devices such as smartphones and digital cameras, as well as camera devices such as monitors and PC lenses. Background Technology

[0002] In recent years, with the rise of various smart devices, the demand for miniaturized camera lenses has been increasing. Due to the shrinking pixel size of image sensors and the current trend in electronic products towards high functionality and lightweight portability, miniaturized camera lenses with good image quality have become mainstream in the market. To achieve better image quality, multi-element lens structures are often used. Furthermore, with technological advancements and increasingly diverse user needs, as the pixel area of ​​image sensors continues to shrink and system requirements for image quality continue to rise, seven-element lens structures are gradually appearing in lens designs. There is an urgent need for telephoto camera lenses with excellent optical characteristics, small size, and adequate aberration correction. Summary of the Invention

[0003] To address the aforementioned problems, the main objective of this invention is to provide a camera optical lens that, while possessing excellent optical performance, also meets the design requirements of a large aperture and ultra-thin design.

[0004] To achieve the above objectives, the present invention provides a camera optical lens comprising seven lenses, which, from the object side to the image side, are sequentially: a first lens with positive refractive power, a second lens with positive 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; wherein the focal length of the camera optical lens is f, the field of view of the camera optical lens in 1.0 field of view is FOV, the image height of the camera optical lens in 1.0 field of view is IH, the total optical length of the camera optical lens is TTL, the axial distance from the image side of the third lens to the object side of the fourth lens is d6, the central radius of curvature of the object side of the third lens is R5, the central radius of curvature of the image side of the third lens is R6, and the combined focal length of the first lens and the second lens is f12, satisfying the following relationship: 50.00 ≤ (FOV) f) / (2 IH)≤57.00; 0.15≤d6 / TTL≤0.26; 1.50≤R5 / R6≤3.30; 0.55≤f12 / f≤1.00.

[0005] Preferably, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, and the focal length of the seventh lens is f7, and satisfies the following relationship: 0.80≤(f4-f5) / (f6-f7)≤1.80.

[0006] Preferably, the focal length of the first lens is f1, the object side of the first lens is convex at the paraxial position, and the image side of the first lens is concave at the paraxial position; the central radius of curvature of the object side of the first lens is R1, the central radius of curvature of the image side of the first lens is R2, and the axial thickness of the first lens is d1, and the following relationships are satisfied: 1.10≤f1 / f≤2.24; -2.00≤(R1+R2) / (R1-R2)≤-1.97; 0.056≤d1 / TTL≤0.099.

[0007] Preferably, the object-side surface of the second lens is convex near the axis, and the image-side surface of the second lens is concave near the axis; the focal length of the second lens is f2, the central radius of curvature of the object-side surface of the second lens is R3, the central radius of curvature of the image-side surface of the second lens is R4, and the on-axis thickness of the second lens is d3, and the following relationships are satisfied: 1.04≤f2 / f≤1.74; -3.16≤(R3+R4) / (R3-R4)≤-2.34; 0.056≤d3 / TTL≤0.107.

[0008] Preferably, the object-side surface of the third lens is convex near the axis, and the image-side surface of the third lens is concave near the axis; the focal length of the third lens is f3, and the axial thickness of the third lens is d5, and the following relationships are satisfied: -1.21≤f3 / f≤-0.82; 1.87≤(R5+R6) / (R5-R6)≤4.83; 0.023≤d5 / TTL≤0.098.

[0009] Preferably, the object-side surface of the fourth lens is concave near the axis, and the image-side surface of the fourth lens is convex near the axis; the focal length of the fourth lens is f4, the central radius of curvature of the object-side surface of the fourth lens is R7, the central radius of curvature of the image-side surface of the fourth lens is R8, and the axial thickness of the fourth lens is d7, and the following relationships are satisfied: 0.65≤f4 / f≤0.73; 1.05≤(R7+R8) / (R7-R8)≤2.01; 0.095≤d7 / TTL≤0.182.

[0010] Preferably, the image-side surface of the fifth lens is concave near the axis; the focal length of the fifth lens is f5, the central radius of curvature of the object-side surface of the fifth lens is R9, the central radius of curvature of the image-side surface of the fifth lens is R10, and the axial thickness of the fifth lens is d9, and satisfies the following relationships: -1.63≤f5 / f≤-0.75; 0.90≤(R9+R10) / (R9-R10)≤1.18; 0.081≤d9 / TTL≤0.100.

[0011] Preferably, the object-side surface of the sixth lens is concave near the axis, and the image-side surface of the sixth lens is convex near the axis; the focal length of the sixth lens is f6, the central radius of curvature of the object-side surface of the sixth lens is R11, the central radius of curvature of the image-side surface of the sixth lens is R12, and the axial thickness of the sixth lens is d11, and satisfies the following relationships: 0.50≤f6 / f≤0.87; 2.77≤(R11+R12) / (R11-R12)≤6.11; 0.078≤d11 / TTL≤0.092.

[0012] Preferably, the object-side surface of the seventh lens is convex near the axis, and the image-side surface of the seventh lens is concave near the axis; the focal length of the seventh lens is f7, the central radius of curvature of the object-side surface of the seventh lens is R13, the central radius of curvature of the image-side surface of the seventh lens is R14, and the axial thickness of the seventh lens is d13, and satisfies the following relationships: -0.88≤f7 / f≤-0.47; 2.01≤(R13+R14) / (R13-R14)≤2.66; 0.045≤d13 / TTL≤0.049.

[0013] Preferably, the second lens is made of glass.

[0014] The beneficial effects of the present invention are as follows: the camera optical lens of the present invention has excellent optical characteristics, and has the characteristics of large aperture and ultra-thinness. It is a telephoto optical camera lens with good optical performance, and is especially suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used 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 those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic diagram of the structure of the camera optical lens according to the first embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of axial aberrations of the camera optical lens shown; Figure 3 yes Figure 1 A schematic diagram of chromatic aberration at magnification for a camera lens; Figure 4 yes Figure 1 A schematic diagram of field curvature and distortion of the camera optical lens shown; Figure 5 This is a schematic diagram of the structure of the camera optical lens according to the second embodiment of the present invention; Figure 6 yes Figure 5 A schematic diagram of axial aberrations of the camera optical lens shown; Figure 7 yes Figure 5 A schematic diagram of chromatic aberration at magnification for a camera lens; Figure 8 yes Figure 5 A schematic diagram of field curvature and distortion of the camera optical lens shown; Figure 9 This is a schematic diagram of the structure of the camera optical lens according to the third embodiment of the present invention; Figure 10 yes Figure 9 A schematic diagram of axial aberrations of the camera optical lens shown; Figure 11 yes Figure 9 A schematic diagram of chromatic aberration at magnification for a camera lens; Figure 12 yes Figure 9 A schematic diagram of field curvature and distortion of the camera optical lens shown; Figure 13 This is a schematic diagram of the structure of the camera optical lens according to the fourth embodiment of the present invention; Figure 14 yes Figure 13 A schematic diagram of axial aberrations of the camera optical lens shown; Figure 15 yes Figure 13 A schematic diagram of chromatic aberration at magnification for a camera lens; Figure 16 yes Figure 13 The diagram shows the field curvature and distortion of the camera lens. Detailed Implementation

[0016] 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.

[0017] Referring to the accompanying drawings, the technical solution of the present invention provides a camera optical lens 10, 20, 30, 40. Figure 1 , 5 Figures 9 and 13 show the imaging optical lenses 10, 20, 30, and 40 of the present invention, which together comprise seven lenses. Specifically, the imaging optical lenses, from the object side to the image side, are as follows: first lens L1, aperture S1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, and seventh lens L7. An optical filter GF or other optical element may be disposed between the seventh lens L7 and the image plane Si.

[0018] The first lens L1 is made of plastic, the second lens L2 is made of glass, 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 first lens L1, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 can also be made of other materials.

[0019] Let the focal length of the camera lens be f, the field of view (FOV) of the camera lens in its 1.0 field of view be FOV, and the image height (IH) of the camera lens in its 1.0 field of view be IH. The following relationship must be satisfied: 50.00 ≤ (FOV) f) / (2 The condition IH)≤57.00 specifies the range of ratios between the field of view, focal length, and image height. Within this range, it helps to achieve telephoto imaging with a large image plane.

[0020] The axial distance from the image side of the third lens L3 to the object side of the fourth lens L4 is defined as d6, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.15≤d6 / TTL≤0.26. This specifies the range of the ratio of the distance between the third lens L3 and the fourth lens L4 to the total optical length. Within this range, a ratio higher than the lower limit helps the light to transition smoothly near the aperture stop, which is beneficial to improving image quality. A ratio lower than the upper limit helps control the total optical length of the system.

[0021] The central radius of curvature of the object side of the third lens L3 is defined as R5, and the central radius of curvature of the image side of the third lens L3 is defined as R6, satisfying the following relationship: 1.50≤R5 / R6≤3.30. This defines the shape of the third lens L3. Within the range of the condition, it can mitigate the degree of light deflection after passing through the lens, effectively correct chromatic aberration, and make the chromatic aberration |LC|≤2.0μm.

[0022] The combined focal length of the first lens L1 and the second lens L2 is defined as f12, satisfying the following relationship: 0.55≤f12 / f≤1.00. This specifies the ratio of the combined focal length of the first lens L1 and the second lens L2 to the total focal length of the system. Within the range of the condition, by reasonably allocating the optical focal length of the system, the system can achieve better imaging quality and lower sensitivity.

[0023] The focal lengths of the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are defined as f4, f5, f6, and f7, respectively, satisfying the following relationship: 0.80 ≤ (f4-f5) / (f6-f7) ≤ 1.80. This defines the ratio between the difference between the focal lengths f4 and f5 of the fourth lens L4 and the sixth lens L6 and the seventh lens L7. Within this condition, by reasonably allocating the optical focal lengths of the system, the system can achieve better imaging quality and lower sensitivity.

[0024] Under the above conditions, the camera optical lenses 10, 20, 30, and 40 have good optical performance while meeting the design requirements of large aperture and ultra-thin design. They are telephoto optical camera lenses with good optical performance. Based on the characteristics of the camera optical lenses 10, 20, 30, and 40, they are particularly suitable for mobile phone camera lens assemblies and web camera lenses composed of high-pixel CCD, CMOS and other camera elements.

[0025] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0026] The object-side surface of the first lens L1 is convex near the axis, and the image-side surface is concave near the axis. The first lens L1 has positive refractive power. The object-side surface and image-side surface of the first lens L1 can also be configured with other concave and convex distributions.

[0027] The focal length of the camera optical lens is defined as f, and the focal length of the first lens L1 is f1, satisfying the following relationship: 1.10≤f1 / f≤2.24. By controlling the optical power of the first lens L1 within a reasonable range, it is beneficial to correct the aberrations of the optical system.

[0028] Define the center radius of curvature of the object side of the first lens L1 as R1 and the center radius of curvature of the image side of the first lens L1 as R2, satisfying the following relationship: -2.00≤(R1+R2) / (R1-R2)≤-1.97. Reasonably control the shape of the first lens L1 so that the first lens L1 can effectively correct the spherical aberration of the system.

[0029] The on-axis thickness of the first lens L1 is d1, and the total optical length of the camera lens is TTL. The following relationship is satisfied: 0.056≤d1 / TTL≤0.099. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0030] The object-side surface of the second lens L2 is convex near the axis, and the image-side surface is concave near the axis. The second lens L2 has positive refractive power. The object-side and image-side surfaces of the second lens L2 can also be configured with other concave and convex distributions.

[0031] Define the focal length of the camera lens as f and the focal length of the second lens L2 as f2, satisfying the following relationship: 1.04≤f2 / f≤1.74. By controlling the positive optical power of the second lens L2 within a reasonable range, it is beneficial to correct the aberrations of the optical system.

[0032] The center radius of curvature of the object side of the second lens L2 is R3, and the center radius of curvature of the image side of the second lens L2 is R4, satisfying the following relationship: -3.16≤(R3+R4) / (R3-R4)≤-2.34, which defines the shape of the second lens L2. When within this range, as lenses develop towards ultra-thinness, it is beneficial to correct on-axis chromatic aberration.

[0033] The on-axis thickness of the second lens L2 is d3, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.056≤d3 / TTL≤0.107. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0034] The object-side surface of the third lens L3 is convex near the axis, and the image-side surface is concave near the axis. The third lens L3 has negative refractive power. The object-side and image-side surfaces of the third lens L3 can also be configured with other concave and convex distributions.

[0035] The focal length of the camera lens is defined as f, and the focal length of the third lens L3 is defined as f3, satisfying the following relationship: -1.21≤f3 / f≤-0.82. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0036] The central radius of curvature of the object side of the third lens L3 is R5, and the central radius of curvature of the image side of the third lens L3 is R6, satisfying the following relationship: 1.87≤(R5+R6) / (R5-R6)≤4.83. This defines the shape of the third lens L3, which is beneficial to the shaping of the third lens L3. Within the range specified by the condition, it can mitigate the degree of light deflection after passing through the lens and effectively reduce aberrations.

[0037] The on-axis thickness of the third lens L3 is d5, and the total optical length of the camera lens is TTL. The following relationship is satisfied: 0.023≤d5 / TTL≤0.098. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0038] The object-side surface of the fourth lens L4 is concave near the axis, while the image-side surface is convex near the axis. The fourth lens L4 has positive refractive power. The object-side and image-side surfaces of the fourth lens L4 can also be configured with other concave and convex distributions.

[0039] The focal length of the camera lens is defined as f, and the focal length of the fourth lens L4 is f4, satisfying the following relationship: 0.65≤f4 / f≤0.73. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0040] The center radius of curvature of the object side of the fourth lens L4 is R7, and the center radius of curvature of the image side of the fourth lens L4 is R8, and the following relationship is satisfied: 1.05≤(R7+R8) / (R7-R8)≤2.01, which defines the shape of the fourth lens L4. When within the range, with the development of ultra-thinness, it is beneficial to correct aberrations and other problems in off-axis drawing angles.

[0041] The on-axis thickness of the fourth lens L4 is d7, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.095≤d7 / TTL≤0.182. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0042] The object-side surface of the fifth lens L5 is either concave or convex near the axis, while the image-side surface is concave near the axis. The fifth lens L5 has negative refractive power. The image-side surface of the fifth lens L5 can also be configured with other concave or convex distributions.

[0043] The focal length of the camera optical lens is defined as f, and the focal length of the fifth lens L5 is f5, satisfying the following relationship: -1.63≤f5 / f≤-0.75. This limitation on the fifth lens L5 can effectively make the light angle of the camera optical lens smoother and reduce tolerance sensitivity.

[0044] The central radius of curvature of the object side of the fifth lens L5 is R9, and the central radius of curvature of the image side of the fifth lens L5 is R10, and they satisfy the following relationship: 0.90≤(R9+R10) / (R9-R10)≤1.18, which defines the shape of the fifth lens L5. When within this range, with the development of ultra-thinness, it is beneficial to correct aberrations and other problems in off-axis drawing angles.

[0045] The on-axis thickness of the fifth lens L5 is d9, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.081≤d9 / TTL≤0.100. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0046] The object-side surface of the sixth lens L6 is concave near the axis, while the image-side surface is convex near the axis. The sixth lens L6 has positive refractive power. The object-side and image-side surfaces of the sixth lens L6 can also be configured with other concave and convex distributions.

[0047] The focal length of the camera lens is defined as f, and the focal length of the sixth lens L6 is f6, satisfying the following relationship: 0.50≤f6 / f≤0.87. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0048] The central radius of curvature of the object side of the sixth lens L6 is R11, and the central radius of curvature of the image side of the sixth lens L6 is R12, satisfying the following relationship: 2.77≤(R11+R12) / (R11-R12)≤6.11, which defines the shape of the sixth lens. Within the specified range, with the development of ultra-thin lenses, this is beneficial for correcting aberrations and other problems at off-axis drawing angles.

[0049] The on-axis thickness of the sixth lens L6 is d11, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.078≤d11 / TTL≤0.092. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0050] The object-side surface of the seventh lens L7 is convex near the axis, while the image-side surface is concave near the axis. The seventh lens L7 has negative refractive power. The object-side and image-side surfaces of the seventh lens L7 can also be configured with other concave and convex distributions.

[0051] The focal length of the camera lens is defined as f, and the focal length of the seventh lens L7 is f7, satisfying the following relationship: -0.88≤f7 / f≤-0.47. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.

[0052] The central radius of curvature of the object side of the seventh lens L7 is R13, and the central radius of curvature of the image side of the seventh lens L7 is R14, satisfying the following relationship: 2.01≤(R13+R14) / (R13-R14)≤2.66, which defines the shape of the seventh lens. Within the specified range, with the development of ultra-thin lenses, this is beneficial for correcting aberrations and other problems at off-axis drawing angles.

[0053] The on-axis thickness of the seventh lens L7 is d13, and the total optical length of the camera lens is TTL, satisfying the following relationship: 0.045≤d13 / TTL≤0.049. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0054] The camera optical lens of the present invention will be described below with examples. The symbols described in each example are as follows. The units for focal length, on-axis distance, center radius of curvature, on-axis thickness, inversion point position, and stagnation point position are mm.

[0055] TTL: Total optical length (axial distance from the object surface of the first lens L1 to the image plane Si), in mm; Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens.

[0056] Image height IH of 1.0 field of view: The field of view height corresponding to the effective pixel of the sensor (i.e., half the diagonal length of the effective pixel area of ​​the sensor). 1.0 Field of View (FOV): The field of view angle corresponding to the effective pixel of the sensor; Image height IHm of MIC field of view: The field of view height extended beyond 1.0 to prevent assembly deviation; FOVm: The field of view angle corresponding to the image height of the MIC field of view; Preferably, the object-side and / or image-side surfaces of the lens may also be provided with inflection points and / or stagnation points to meet the requirements of high-quality imaging.

[0057] The technical solution of the present invention will be described in detail below with four embodiments. The technical effects of the present invention cannot be achieved when the above-described conditions are not met.

[0058] (First Implementation) Tables 1 and 2 show the design data of the camera optical lens 10 according to the first embodiment of the present invention.

[0059] Table 1

[0060] The meanings of each symbol are as follows.

[0061] S1: Aperture; R: Radius of curvature at the center of the optical surface; R1: The central radius of curvature of the object-side surface of the first lens L1; R2: The central radius of curvature of the image-side surface of the first lens L1; R3: The central radius of curvature of the object-side surface of the second lens L2; R4: The central radius of curvature of the image-side surface of the second lens L2; R5: The central radius of curvature of the object-side surface of the third lens L3; R6: The central radius of curvature of the image-side surface of the third lens L3; R7: The central radius of curvature of the object side surface of the fourth lens L4; R8: The central radius of curvature of the image-side surface of the fourth lens L4; R9: The central radius of curvature of the object-side surface of the fifth lens L5; R10: The central radius of curvature of the image-side surface of the fifth lens L5; R11: The central radius of curvature of the object-side surface of the sixth lens L6; R12: The central radius of curvature of the image-side surface of the sixth lens L6; R13: The central radius of curvature of the object-side surface of the seventh lens L7; R14: The central radius of curvature of the image-side surface of the seventh lens L7; R15: The center radius of curvature of the object side surface of the optical filter GF; R16: Radius of curvature of the center of the image side of the optical filter GF; d: Axial thickness of the lens, axial distance between lenses; d0: The on-axis distance from aperture S1 to the object-side surface of the first lens L1; d1: On-axis thickness of the first lens L1; d2: The on-axis distance from the image-side surface of the first lens L1 to the object-side surface of the second lens L2; d3: On-axis thickness of the second lens L2; d4: The axial distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3; d5: On-axis thickness of the third lens L3; d6: The on-axis distance from the image-side surface of the third lens L3 to the object-side surface of the fourth lens L4; d7: On-axis thickness of the fourth lens L4; d8: The on-axis distance from the image-side surface of the fourth lens L4 to the object-side surface of the fifth lens L5; d9: On-axis thickness of the fifth lens L5; d10: The axial distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6; d11: On-axis thickness of the sixth lens L6; d12: The axial distance from the image-side surface of the sixth lens L6 to the object-side surface of the seventh lens L7; d13: On-axis thickness of the seventh lens L7; d14: The on-axis distance from the image side of the seventh lens L7 to the object side of the optical filter GF; d15: On-axis thickness of the optical filter GF; d16: The axial distance from the image-side surface of the optical filter GF to the image plane Si; nd: Refractive index of the d-line (wavelength of the d-line is 587.56 nm); nd1: The refractive index of the d-line of the first lens L1; nd2: The refractive index of the d-line of the second lens L2; nd3: The refractive index of the d-line of the third lens L3; nd4: The refractive index of the d-line of the fourth lens L4; nd5: The refractive index of the d-line of the fifth lens L5; nd6: The refractive index of the d-line of the sixth lens L6; nd7: The refractive index of the d-line of the seventh lens L7; ndg: The refractive index of the d-line of the optical filter GF; vd: Abbe number; v1: Abbe number of the first lens L1; v2: Abbe number of the second lens L2; v3: Abbe number of the third lens L3; v4: Abbe number of the fourth lens L4; v5: Abbe number of the fifth lens L5; v6: Abbe number of the sixth lens L6; v7: Abbe number of the seventh lens L7; vg: Abbe number of the optical filter GF.

[0062] Table 2 shows the aspherical data of each lens in the camera optical lens 10 of the first embodiment of the present invention.

[0063] Table 2

[0064] For convenience, the aspherical surfaces of each lens surface are as shown in the following formula (1). However, the present invention is not limited to the aspherical polynomial form represented by formula (1).

[0065] z=(cr 2 ) / {1+[1-(k+1)(c 2 r2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1) Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 are aspheric coefficients, c is the curvature at 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).

[0066] Tables 3 and 4 show the inflection point and stagnation point design data of each lens in the camera optical lens 10 of the first embodiment of the present invention. P1R1 and P1R2 represent the object-side and image-side surfaces of the first lens L1, respectively; P2R1 and P2R2 represent the object-side and image-side surfaces of the second lens L2, respectively; P3R1 and P3R2 represent the object-side and image-side surfaces of the third lens L3, respectively; P4R1 and P4R2 represent the object-side and image-side surfaces of the fourth lens L4, respectively; P5R1 and P5R2 represent the object-side and image-side surfaces of the fifth lens L5, respectively; P6R1 and P6R2 represent the object-side and image-side surfaces of the sixth lens L6, respectively; and P7R1 and P7R2 represent the object-side and image-side surfaces of the seventh lens L7, respectively. The data corresponding to the "Inflection Point Position" column is the vertical distance from the inflection point set on the surface of each lens to the optical axis of the camera optical lens 10. The data in the "Station Point Position" field corresponds to the vertical distance from the station point set on each lens surface to the optical axis of the camera optical lens 10.

[0067] Table 3

[0068] Table 4

[0069] Figure 2 , Figure 3Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm passes through the camera optical lens 10 of the first embodiment. Figure 4 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 10 of the first embodiment. Figure 4 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0070] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 8.056 mm, the image height IH of the 1.0 field of view is 6.247 mm, the field of view FOV of the 1.0 field of view is 46.52°, the image height IHm of the MIC field of view is 6.300 mm, and the field of view FOVm of the MIC field of view is 46.88°.

[0071] The camera optical lens 10 meets the design requirements of large aperture and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0072] (Second Implementation) The symbols in the second embodiment have the same meanings as those in the first embodiment.

[0073] Figure 5 The image shows the camera optical lens 20 according to the second embodiment of the present invention.

[0074] Tables 5 and 6 show the design data of the camera optical lens 20 according to the second embodiment of the present invention.

[0075] Table 5

[0076] Table 6 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0077] Table 6

[0078] Tables 7 and 8 show the inflection point and stagnation point design data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0079] Table 7

[0080] Table 8

[0081] Figure 6 , Figure 7Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm passes through the camera optical lens 20 of the second embodiment. Figure 8 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 20 of the second embodiment. Figure 8 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0082] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 8.906 mm, the image height IH of the 1.0 field of view is 6.247 mm, the field of view FOV of the 1.0 field of view is 44.09°, the image height IHm of the MIC field of view is 6.300 mm, and the field of view FOVm of the MIC field of view is 44.51°.

[0083] The camera optical lens 20 meets the design requirements of large aperture and ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0084] (Third Implementation) The symbols in the third embodiment have the same meanings as those in the first embodiment.

[0085] Figure 9 The image shown is the camera optical lens 30 according to the third embodiment of the present invention.

[0086] Tables 9 and 10 show the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0087] Table 9

[0088] Table 10 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0089] Table 10

[0090] Tables 11 and 12 show the inflection point and stagnation point design data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0091] Table 11

[0092] Table 12

[0093] Figure 10 , Figure 11Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm passes through the camera optical lens 30 of the third embodiment. Figure 12 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 30 of the third embodiment. Figure 12 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0094] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 6.035 mm, the image height IH of the 1.0 field of view is 6.247 mm, the field of view FOV of the 1.0 field of view is 57.93°, the image height IHm of the MIC field of view is 6.300 mm, and the field of view FOVm of the MIC field of view is 58.42°.

[0095] The camera optical lens 30 meets the design requirements of large aperture and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0096] (Fourth Implementation) The symbols in the fourth embodiment have the same meanings as those in the first embodiment.

[0097] Figure 13 The image shown is the camera optical lens 40 according to the fourth embodiment of the present invention.

[0098] Tables 13 and 14 show the design data of the camera optical lens 40 according to the fourth embodiment of the present invention.

[0099] Table 13

[0100] Table 13 shows the aspherical data of each lens in the camera optical lens 40 of the fourth embodiment of the present invention.

[0101] Table 14

[0102] Tables 15 and 16 show the inflection point and stagnation point design data of each lens in the camera optical lens 40 of the fourth embodiment of the present invention.

[0103] Table 15

[0104] Table 16

[0105] Figure 14 , Figure 15Axial aberration and magnification chromatic aberration are shown respectively after light with wavelengths of 650nm, 610nm, 555nm, 510nm and 470nm passes through the camera optical lens 40 of the fourth embodiment. Figure 16 This shows a schematic diagram of field curvature and distortion after light with a wavelength of 555nm passes through the camera optical lens 40 of the fourth embodiment. Figure 16 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0106] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 9.059 mm, the image height IH of the 1.0 field of view is 6.247 mm, the field of view FOV of the 1.0 field of view is 43.64°, the image height IHm of the MIC field of view is 6.300 mm, and the field of view FOVm of the MIC field of view is 44.13°.

[0107] The camera optical lens 40 meets the design requirements of large aperture and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0108] Table 17 shows the values ​​corresponding to various numerical values ​​and parameters specified in the conditional expressions for each of the four implementation methods.

[0109] Table 17

[0110] 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. A camera optical lens, characterized in that, The camera optical lens comprises seven lenses, which are arranged in the following order from the object side to the image side: a first lens with positive refractive power, a second lens with positive 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. Wherein, the focal length of the camera optical lens is f, the field of view of the camera optical lens in 1.0 field of view is FOV, the image height of the camera optical lens in 1.0 field of view is IH, the total optical length of the camera optical lens is TTL, the axial distance from the image side of the third lens to the object side of the fourth lens is d6, the central radius of curvature of the object side of the third lens is R5, the central radius of curvature of the image side of the third lens is R6, and the combined focal length of the first lens and the second lens is f12, and the following relationship is satisfied: 50.00≤(FOV f) / (2 IH)≤57.00; 0.15≤d6 / TTL≤0.26; 1.50≤R5 / R6≤3.30; 0.55≤f12 / f≤1.

00.

2. The camera optical lens according to claim 1, characterized in that, The fourth lens has a focal length of f4, the fifth lens has a focal length of f5, the sixth lens has a focal length of f6, and the seventh lens has a focal length of f7, and they satisfy the following relationship: 0.80≤(f4-f5) / (f6-f7)≤1.

80.

3. The camera optical lens according to claim 1, characterized in that, The object-side surface of the first lens is convex at the paraxial position, and the image-side surface of the first lens is concave at the paraxial position. The focal length of the first lens is f1, the central radius of curvature of the object side of the first lens is R1, the central radius of curvature of the image side of the first lens is R2, and the axial thickness of the first lens is d1, and the following relationship is satisfied: 1.10≤f1 / f≤2.24; -2.00≤(R1+R2) / (R1-R2)≤-1.97; 0.056≤d1 / TTL≤0.

099.

4. The camera optical lens according to claim 1, characterized in that, The object-side surface of the second lens is convex at the paraxial position, and the image-side surface of the second lens is concave at the paraxial position. The focal length of the second lens is f2, the central radius of curvature of the object side of the second lens is R3, the central radius of curvature of the image side of the second lens is R4, and the axial thickness of the second lens is d3, satisfying the following relationship: 1.04 ≤ f² / f ≤ 1.74; -3.16≤(R3+R4) / (R3-R4)≤-2.34; 0.056≤d3 / TTL≤0.

107.

5. The camera optical lens according to claim 1, characterized in that, The object-side surface of the third lens is convex at the paraxial position, and the image-side surface of the third lens is concave at the paraxial position. The third lens has a focal length of f3 and an on-axis thickness of d5, and satisfies the following relationship: -1.21≤f3 / f≤-0.82; 1.87≤(R5+R6) / (R5-R6)≤4.83; 0.023≤d5 / TTL≤0.

098.

6. The camera optical lens according to claim 1, characterized in that, The object-side surface of the fourth lens is concave near the axis, and the image-side surface of the fourth lens is convex near the axis. The fourth lens has a focal length of f4, a central radius of curvature of the object side of the fourth lens of R7, a central radius of curvature of the image side of the fourth lens of R8, and an axial thickness of d7, and satisfies the following relationship: 0.65≤f4 / f≤0.73; 1.05≤(R7+R8) / (R7-R8)≤2.01; 0.095≤d7 / TTL≤0.

182.

7. The camera optical lens according to claim 1, characterized in that, The image-side surface of the fifth lens is concave at the paraxial position; The fifth lens has a focal length of f5, a central radius of curvature of the object side of the fifth lens of R9, a central radius of curvature of the image side of the fifth lens of R10, and an axial thickness of d9, and satisfies the following relationship: -1.63≤f5 / f≤-0.75; 0.90≤(R9+R10) / (R9-R10)≤1.18; 0.081≤d9 / TTL≤0.

100.

8. The camera optical lens according to claim 1, characterized in that, The object-side surface of the sixth lens is concave near the axis, and the image-side surface of the sixth lens is convex near the axis. The sixth lens has a focal length of f6, a central radius of curvature of the object-side surface of the sixth lens of R11, a central radius of curvature of the image-side surface of the sixth lens of R12, and an axial thickness of d11, and satisfies the following relationship: 0.50≤f6 / f≤0.87; 2.77≤(R11+R12) / (R11-R12)≤6.11; 0.078≤d11 / TTL≤0.

092.

9. The camera optical lens according to claim 1, characterized in that, The object-side surface of the seventh lens is convex at the paraxial position, and the image-side surface of the seventh lens is concave at the paraxial position. The seventh lens has a focal length of f7, a central radius of curvature of the object-side surface of the seventh lens of R13, a central radius of curvature of the image-side surface of the seventh lens of R14, and an axial thickness of d13, and satisfies the following relationship: -0.88≤f7 / f≤-0.47; 2.01≤(R13+R14) / (R13-R14)≤2.66; 0.045≤d13 / TTL≤0.

049.

10. The camera optical lens according to claim 1, characterized in that, The second lens is made of glass.

Images