Imaging optical lens

Abstract

The present invention relates to the field of optical lenses. Disclosed is an imaging optical lens. The imaging optical lens is provided, in sequence from an object side to an image side, with: a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a negative refractive power, a fourth lens having a negative refractive power, and a fifth lens having a positive refractive power, wherein the focal length of the imaging optical lens is defined as f, the total optical length of the imaging optical lens is defined as TTL, the axial distance from an image-side surface of the first lens to an object-side surface of the second lens is defined as d2, the focal length of the fourth lens is defined as f4, the central radius of curvature of the object-side surface of the fourth lens is defined as R7, and the central radius of curvature of the image-side surface of the fourth lens is defined as R8, satisfying the following relational expressions: 0.75≤TTL / f≤0.84; 2.99≤(d2 / f)*100≤15.00; and -0.40≤f4 / (R7-R8)≤-0.05.

Description

Camera optical lens 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, five-element lens structures are gradually appearing in lens designs. There is an urgent need for wide-angle 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, meets the design requirements of large aperture, ultra-thin design, and wide-angle capability.

[0004] To achieve the above objectives, the present invention provides a camera optical lens, wherein the camera optical lens comprises, from the object side to the image side, the following elements in sequence: 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 negative refractive power, and a fifth lens with positive refractive power; wherein the focal length of the camera optical lens is f, the total optical length of the camera optical lens is TTL, the axial distance from the image side of the first lens to the object side of the second lens is d2, the focal length of the fourth lens is f4, the central radius of curvature of the object side of the fourth lens is R7, and the central radius of curvature of the image side of the fourth lens is R8, and satisfying the following relationships: 0.75≤TTL / f≤0.84; 3≤(d2 / f)*100≤15.00; -0.4≤f4 / (R7-R8)≤-0.05.

[0005] Preferably, the image height of the camera optical lens is IH, and satisfies the following relationship: 5.5≤(43.25 / (2*IH))*f≤71.5.

[0006] Preferably, the focal length of the fifth lens is f5, and satisfies the following relationship: -1.05≤f4 / f5≤-0.40.

[0007] Preferably, -1.03≤f4 / f5≤-0.40.

[0008] Preferably, the object-side surface of the first lens is convex near the axis; the focal length of the first lens is f1, the central radius of curvature of the object-side surface of the first lens is R1, the central radius of curvature of the image-side surface of the first lens is R2, and the axial thickness of the first lens is d1, and the following relationships are satisfied: 0.44≤f1 / f≤0.49; -1.04≤(R1+R2) / (R1-R2)≤-0.77; 0.145≤d1 / TTL≤0.244.

[0009] 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 satisfies the following relationships: -1.43≤f2 / f≤-0.65; 1.53≤(R3+R4) / (R3-R4)≤2.82; 0.026≤d3 / TTL≤0.033.

[0010] Preferably, the image-side surface of the third lens is concave near the axis; the focal length of the third lens is f3, the central radius of curvature of the object-side surface of the third lens is R5, the central radius of curvature of the image-side surface of the third lens is R6, and the axial thickness of the third lens is d5, and satisfies the following relationships: -1.20≤f3 / f≤-0.83; 0.73≤(R5+R6) / (R5-R6)≤1.80; 0.028≤d5 / TTL≤0.039.

[0011] 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 axial thickness of the fourth lens is d7, and satisfies the following relationships: -0.76≤f4 / f≤-0.32; -1.37≤(R7+R8) / (R7-R8)≤-1.05; 0.026≤d7 / TTL≤0.038.

[0012] Preferably, the image-side surface of the fifth lens is convex 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 the following relationships are satisfied: 0.31≤f5 / f≤1.90; -0.34≤(R9+R10) / (R9-R10)≤1.98; 0.111≤d9 / TTL≤0.163.

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

[0014] The beneficial effects of the present invention are as follows: the camera optical lens according to the present invention has excellent optical characteristics, and has the characteristics of large aperture, wide angle and ultra-thinness, and is especially suitable for mobile phone camera optical lens assemblies and WEB camera optical 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:

[0016] Figure 1 is a schematic diagram of the structure of the camera optical lens according to the first embodiment of the present invention;

[0017] Figure 2 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 1;

[0018] Figure 3 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 1;

[0019] Figure 4 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 1;

[0020] Figure 5 is a schematic diagram of the structure of the camera optical lens according to the second embodiment of the present invention;

[0021] Figure 6 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 5;

[0022] Figure 7 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 5;

[0023] Figure 8 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 5;

[0024] Figure 9 is a schematic diagram of the structure of the camera optical lens according to the third embodiment of the present invention;

[0025] Figure 10 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 9;

[0026] Figure 11 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 9;

[0027] Figure 12 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 9;

[0028] Figure 13 is a schematic diagram of the structure of the camera optical lens according to the fourth embodiment of the present invention;

[0029] Figure 14 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 13;

[0030] Figure 15 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 13;

[0031] Figure 16 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 13. Detailed Implementation

[0032] 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.

[0033] Referring to the accompanying drawings, the technical solution of the present invention provides a camera optical lens 10, 20, 30, and 40. Figures 1, 5, 9, and 13 show the camera optical lenses 10, 20, 30, and 40 of the present invention. The camera optical lens, from the object side to the image side, is configured with: an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5. An optical filter GF or other optical elements may be disposed between the fifth lens L5 and the image plane S1.

[0034] The focal length of the camera optical lenses 10, 20, 30, and 40 is defined as f, and the total optical length of the camera optical lenses 10, 20, 30, and 40 is defined as TTL, satisfying the following relationship: 0.75≤TTL / f≤0.84. This specifies the ratio of the total optical length of the camera optical lenses 10, 20, 30, and 40 to their focal lengths. Setting an upper limit for this conditional expression can control the total optical length of the camera optical lenses 10, 20, 30, and 40 to be relatively short, making it easier to achieve miniaturization of the camera optical lenses 10, 20, 30, and 40. Setting a lower limit for this conditional expression is beneficial for correcting distortion and on-axis chromatic aberration, and can also maintain good optical performance.

[0035] The axial distance from the image side of the first lens L1 to the object side of the second lens L2 is defined as d2, which satisfies the following relationship: 3≤(d2 / f)*100≤15. This specifies the ratio of the axial distance from the image side of the first lens L1 to the object side of the second lens L2 to the focal length. Within the range specified by the condition, aberrations can be effectively reduced, ensuring that the performance of the entire system reaches the optimal state.

[0036] The focal length of the fourth lens L4 is defined as f4, the central radius of curvature of the object-side surface of the fourth lens L4 is R7, and the central radius of curvature of the image-side surface of the fourth lens L4 is R8, satisfying the following relationship: -0.4≤f4 / (R7-R8)≤-0.05. This specifies the ratio of the focal length of the fourth lens L4 to the difference between the radii of the object-side and image-side surfaces of the fourth lens L4, thus defining the surface shape of the fourth lens L4. Within the range specified by the condition, the sensitivity of the system can be effectively reduced, stray light generated by the optical system can be reduced, and the imaging quality of the optical system can be improved, thereby improving the performance and reliability of the optical system; at the same time, the production difficulty and cost are reduced.

[0037] 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, wide angle, and ultra-thin design. Based on the characteristics of the camera optical lenses 10, 20, 30, and 40, they are particularly suitable for mobile phone camera optical lens assemblies and WEB camera optical lenses composed of high-pixel CCD, CMOS, and other camera elements.

[0038] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0039] The image height of the camera optical lens 10 is defined as IH, and satisfies the following relationship: 65.5≤(43.25 / (2*IH))*f≤71.5, which specifies that the optical imaging system can meet the golden focal length for shooting portraits within the range specified by the conditional formula, based on the equivalent focal length of the full-frame sensor.

[0040] The focal length of the fourth lens L4 is defined as f4, and the focal length of the fifth lens L5 is defined as f5, satisfying the following relationship: -1.05 ≤ f4 / f5 ≤ -0.4. This specifies the ratio of the focal length of the fourth lens L4 to the focal length of the fifth lens L5. By rationally allocating the optical focal length of the optical system, the optical system achieves better imaging quality and lower sensitivity. Preferably, -1.03 ≤ f4 / f5 ≤ -0.4.

[0041] The object-side surface of the first lens L1 is convex near the axis, and the image-side surface of the first lens L1 is either concave or convex near the axis. The first lens L1 has positive refractive power. The object-side surface of the first lens L1 can also be configured with other concave or convex distributions.

[0042] The focal lengths of the camera optical lenses 10, 20, 30, and 40 are defined as f, and the focal length of the first lens L1 is defined as f1, satisfying the following relationship: 0.44≤f1 / f≤0.49. By controlling the positive optical power of the first lens L1 within a reasonable range, the aberrations of the optical system can be effectively corrected and the imaging quality improved.

[0043] The central radius of curvature of the object side of the first lens L1 is defined as R1, and the central radius of curvature of the image side of the first lens L1 is defined as R2, satisfying the following relationship: -1.04≤(R1+R2) / (R1-R2)≤-0.77. This defines the ratio of the sum of the central radius of curvature R1 of the object side and the central radius of curvature R2 of the image side of the first lens L1 to the difference between the central radius of curvature R1 of the object side and the central radius of curvature R2 of the image side of the first lens L1. This defines the shape of the first lens L1, and within the range specified by the condition, enables the first lens L1 to effectively correct the spherical aberration of the system.

[0044] The on-axis thickness of the first lens L1 is d1, and the total optical length of the imaging optical lenses 10, 20, 30, and 40 is TTL, satisfying the following relationship: 0.145≤d1 / TTL≤0.244. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0045] The object-side surface of the second lens L2 is convex near the axis, and the image-side surface of the second lens L2 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.

[0046] The focal lengths of the camera optical lenses 10, 20, 30, and 40 are defined as f, and the focal length of the second lens L2 is defined as f2, satisfying the following relationship: -1.43≤f2 / f≤-0.65. This specifies the ratio of the focal length of the second lens L2 to the focal lengths of the camera optical lenses 10, 20, 30, and 40. 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.

[0047] The central radius of curvature of the object side of the second lens L2 is R3, and the central radius of curvature of the image side of the second lens L2 is R4, satisfying the following relationship: 1.53≤(R3+R4) / (R3-R4)≤2.82. This specifies the ratio of the sum of the central radius of curvature R3 of the object side and R4 of the image side of the second lens L2 to the difference between the central radius of curvature R3 of the object side and R4 of the image side of the second lens L2. This defines the shape of the second lens L2. Within the range specified by the condition, it is beneficial to correct on-axis chromatic aberration, improve image sharpness, reduce image color distortion, and thus improve imaging quality.

[0048] The on-axis thickness of the second lens L2 is d3, and the total optical length of the imaging optical lenses 10, 20, 30, and 40 is TTL, satisfying the following relationship: 0.026≤d3 / TTL≤0.033. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0049] The object-side surface of the third lens L3 is either convex or concave near the axis, and the image-side surface of the third lens L3 is concave near the axis. The third lens L3 has negative refractive power. The image-side surface of the third lens L3 can also be configured with other concave or convex distributions.

[0050] The focal lengths of the imaging optical lenses 10, 20, 30, and 40 are defined as f, and the focal length of the third lens L3 is defined as f3, satisfying the following relationship: -1.20≤f3 / f≤-0.83. This specifies the ratio of the focal length of the third lens L3 to the focal lengths of the imaging optical lenses 10, 20, 30, and 40. Within the range specified by the condition, the imaging quality of the system can be improved and the sensitivity of the system can be reduced.

[0051] 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: 0.73≤(R5+R6) / (R5-R6)≤1.80. This defines the ratio of the sum of the central radius of curvature R5 of the object side and R6 of the image side of the third lens L3 to the difference between the central radius of curvature R5 of the object side and R6 of the image side of the third lens L3. This defines the shape of the third lens L3. Within the range specified by the condition, it effectively mitigates the degree of light refraction after passing through the lens, reduces aberrations, and improves the imaging quality of the ultra-thin wide-angle lens.

[0052] The on-axis thickness of the third lens L3 is d5, and the total optical length of the camera optical lenses 10, 20, 30, and 40 is TTL, satisfying the following relationship: 0.028≤d5 / TTL≤0.039. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0053] The object-side surface of the fourth lens L4 is concave near the axis, and the image-side surface of the fourth lens L4 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.

[0054] The focal lengths of the camera optical lenses 10, 20, 30, and 40 are defined as f, and the focal length of the fourth lens L4 is defined as f4, satisfying the following relationship: -0.76≤f4 / f≤-0.32. This specifies the ratio of the focal length of the fourth lens L4 to the focal lengths of the camera optical lenses 10, 20, 30, and 40. Within the range specified by the condition, the light angle of the camera optical lens can be effectively made smoother, reducing tolerance sensitivity.

[0055] The central radius of curvature of the object side of the fourth lens L4 is R7, and the central radius of curvature of the image side of the fourth lens L4 is R8, satisfying the following relationship: -1.37≤(R7+R8) / (R7-R8)≤-1.05. This defines the ratio of the sum of the central radius of curvature R7 of the object side and R8 of the image side of the fourth lens L4 to the difference between the central radius of curvature R7 of the object side and R8 of the image side of the fourth lens L4. This defines the shape of the fourth lens L4. Within the range specified by the condition, it is beneficial to correct on-axis chromatic aberration, improve image sharpness, reduce image color distortion, and thus improve imaging quality.

[0056] The on-axis thickness of the fourth lens L4 is d7, and the total optical length of the camera optical lenses 10, 20, 30, and 40 is TTL, satisfying the following relationship: 0.026≤d7 / TTL≤0.038. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0057] The object-side surface of the fifth lens L5 is either concave or convex near the axis, and the image-side surface of the fifth lens L5 is convex 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.

[0058] The focal lengths of the camera optical lenses 10, 20, 30, and 40 are defined as f, and the focal length of the fifth lens L5 is defined as f5, satisfying the following relationship: 0.31≤f5 / f≤1.90. This specifies the ratio of the focal length of the fifth lens L5 to the focal lengths of the camera optical lenses 10, 20, 30, and 40. Within the range specified by the condition, this helps to improve the system performance of the optical system.

[0059] 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, satisfying the following relationship: -0.34≤(R9+R10) / (R9-R10)≤1.98. This defines the ratio of the sum of the central radii of curvature R9 and R10 of the object side of the fifth lens L5 to the difference between the central radii of curvature R9 and R10 of the image side of the fifth lens L5. This defines the shape of the fifth lens L5. Within the range specified by the condition, it is beneficial to correct on-axis chromatic aberration, improve image sharpness, reduce image color distortion, and thus improve imaging quality.

[0060] The on-axis thickness of the fifth lens L5 is d9, and the total optical length of the camera lenses 10, 20, 30, and 40 is TTL, satisfying the following relationship: 0.111≤d9 / TTL≤0.163. Within the range of the condition, it is beneficial to achieve ultra-thinness.

[0061] The first lens L1 is made of glass or plastic, the second lens L2 is made of plastic, the third lens L3 is made of plastic, the fourth lens L4 is made of plastic, and the fifth lens L5 is made of plastic. Other materials may also be used for the lenses.

[0062] The image height of the 1.0 field of view of the camera optical lenses 10, 20, 30, and 40 is IH, and the total optical length of the camera optical lens 10 is TTL, satisfying the following relationship: TTL / IH≤3.96, which is beneficial for achieving ultra-thinness. Preferably, TTL / IH≤3.17 is satisfied.

[0063] The field of view (FOV) of the camera optical lenses 10, 20, 30, and 40 is greater than or equal to 32.29°, thereby achieving wide-angle viewing.

[0064] The aperture values ​​(FNO) of the camera optical lenses 10, 20, 30, and 40 are less than or equal to 2.57, thereby achieving a large aperture and good imaging performance. Preferably, the aperture values ​​(FNO) of the camera optical lenses 10, 20, 30, and 40 are less than or equal to 2.52.

[0065] 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.

[0066] TTL: Total optical length (axial distance from the object surface of the first lens L1 to the image surface Si), in mm;

[0067] Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of a camera lens.

[0068] 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);

[0069] 1.0 Field of View (FOV): The field of view angle corresponding to the effective pixel of the sensor;

[0070] Image height IHm of MIC field of view: The field of view height extended beyond 1.0 to prevent assembly deviation;

[0071] FOVm: The field of view angle corresponding to the image height of the MIC field of view;

[0072] 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.

[0073] The technical solution of the present invention will be described in detail below with four implementation methods.

[0074] (First Implementation)

[0075] The first lens L1 has positive refractive power and is made of glass. Its object side is convex at the paraxial position, and its image side is convex at the paraxial position.

[0076] The second lens L2 has negative refractive power and is made of plastic. Its object side is convex near the axis, and its image side is concave near the axis.

[0077] The third lens L3 has negative refractive power and is made of plastic. Its object side is convex near the axis, and its image side is concave near the axis.

[0078] The fourth lens L4 has negative refractive power and is made of plastic. Its object side is concave near the axis, and its image side is convex near the axis.

[0079] The fifth lens L5 has positive refractive power and is made of plastic. Its object side is convex near the axis, and its image side is also convex near the axis.

[0080] Table 1 shows the design data of the camera optical lens 10 according to the first embodiment of the present invention.

[0081] Table 1

[0082] The symbols have the following meanings: S1: Aperture; R: Radius of curvature at the center of the optical surface; R1: Central radius of curvature of the object-side surface of the first lens L1; R2: Central radius of curvature of the image-side surface of the first lens L1; R3: Central radius of curvature of the object-side surface of the second lens L2; ​​R4: Central radius of curvature of the image-side surface of the second lens L2; ​​R5: Central radius of curvature of the object-side surface of the third lens L3; R6: Central radius of curvature of the image-side surface of the third lens L3; R7: Central radius of curvature of the object-side surface of the fourth lens L4; R8: Central radius of curvature of the image-side surface of the fourth lens L4; R9: Central radius of curvature of the object-side surface of the fifth lens L5; R10: Central radius of curvature of the image-side surface of the fifth lens L5; R11: Central radius of curvature of the object-side surface of the optical filter GF; R12: Central radius of curvature of the image-side surface of the optical filter GF; d: Axial thickness of the lens, axial distance between lenses; d0: Axial distance from aperture S1 to the object-side surface of the first lens L1; d1: On-axis thickness of the first lens L1; d2: 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: On-axis 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: 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: 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: On-axis 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 optical filter GF; d12: On-axis distance from the image-side surface of the optical filter GF to the image plane Si; nd: Refractive index of the d-line (the d-line represents green light with a wavelength of 550 nm); nd1: Refractive index of the d-line of the first lens L1; nd2: Refractive index of the d-line of the second lens L2; ​​nd3: Refractive index of the d-line of the third lens L3; nd4: Refractive index of the d-line of the fourth lens L4; nd5: Refractive index of the d-line of the fifth lens L5; ndg: 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; vg: Abbe number of the optical filter GF.

[0083] Table 2 shows the aspherical data of each lens in the camera optical lens 10 of the first embodiment of the present invention.

[0084] Table 2

[0085] For convenience, the aspherical surfaces of each lens surface are those shown in formula (1) below. However, the present invention is not limited to the aspherical polynomial form represented by 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 +A14r 14 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0086] 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).

[0087] Figures 2 and 3 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656nm, 587nm, 546nm, 486nm, and 436nm passes through the camera optical lens 10 of the first embodiment, respectively. Figure 4 shows schematic diagrams of field curvature and distortion after light with a wavelength of 546nm passes through the camera optical lens 10 of the first embodiment. In Figure 4, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0088] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 3.038 mm, the image height IH of the 1.0 field of view is 2.500 mm, the field of view FOV of the 1.0 field of view is 36.10°, the image height IHm of the MIC field of view is 2.650 mm, and the field of view FOVm of the MIC field of view is 38.36°. The camera optical lens 10 meets the design requirements of large aperture, wide angle, and ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0089] (Second Implementation)

[0090] The symbols in the second embodiment have the same meanings as those in the first embodiment.

[0091] Unlike the first embodiment, in this embodiment, the object-side surface of the third lens L3 is concave near the axis; the object-side surface of the fifth lens L5 is concave near the axis.

[0092] Figure 5 shows the camera optical lens 20 of the second embodiment of the present invention.

[0093] Table 3 shows the design data of the camera optical lens 20 according to the second embodiment of the present invention.

[0094] Table 3

[0095] Table 4 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present invention.

[0096] Table 4

[0097] Figures 6 and 7 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656 nm, 587 nm, 546 nm, 486 nm, and 436 nm passes through the camera optical lens 20 of the second embodiment, respectively. Figure 8 shows schematic diagrams of field curvature and distortion after light with a wavelength of 546 nm passes through the camera optical lens 20 of the second embodiment. In Figure 8, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0098] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 3.035mm, the image height IH of the 1.0 field of view is 2.500mm, the field of view FOV of the 1.0 field of view is 35.53°, the image height IHm of the MIC field of view is 2.650mm, and the field of view FOVm of the MIC field of view is 37.77°. The camera optical lens 20 meets the design requirements of large aperture, wide angle, and ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0099] (Third Implementation)

[0100] The symbols in the third embodiment have the same meanings as those in the first embodiment.

[0101] Unlike the first embodiment, in this embodiment, the image-side surface of the first lens L1 is concave at the paraxial position.

[0102] Figure 9 shows the camera optical lens 30 of the third embodiment of the present invention.

[0103] Table 5 shows the design data of the camera optical lens 30 according to the third embodiment of the present invention.

[0104] Table 5

[0105] Table 6 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.

[0106] Table 6

[0107] Figures 10 and 11 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656 nm, 587 nm, 546 nm, 486 nm, and 436 nm passes through the camera optical lens 30 of the third embodiment, respectively. Figure 12 shows schematic diagrams of field curvature and distortion after light with a wavelength of 546 nm passes through the camera optical lens 30 of the third embodiment. In Figure 12, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0108] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 3.197mm, the image height IH of the 1.0 field of view is 2.420mm, the field of view FOV of the 1.0 field of view is 33.91°, the image height IHm of the MIC field of view is 2.570mm, and the field of view FOVm of the MIC field of view is 36.18°. The camera optical lens 30 meets the design requirements of large aperture, wide angle, and ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0109] (Fourth Implementation)

[0110] The symbols in the fourth embodiment have the same meanings as those in the first embodiment.

[0111] Figure 9 shows the camera optical lens 40 of the fourth embodiment of the present invention.

[0112] Table 7 shows the design data of the camera optical lens 40 according to the fourth embodiment of the present invention.

[0113] Table 7

[0114] Table 8 shows the aspherical data of each lens in the camera optical lens 40 of the fourth embodiment of the present invention.

[0115] Table 8

[0116] Figures 10 and 11 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656 nm, 587 nm, 546 nm, 486 nm, and 436 nm passes through the camera optical lens 40 of the fourth embodiment, respectively. Figure 12 shows schematic diagrams of field curvature and distortion after light with a wavelength of 546 nm passes through the camera optical lens 40 of the fourth embodiment. In Figure 12, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0117] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 3.197mm, the image height IH of the 1.0 field of view is 2.500mm, the field of view FOV of the 1.0 field of view is 32.29°, the image height IHm of the MIC field of view is 2.590mm, and the field of view FOVm of the MIC field of view is 33.47°. The camera optical lens 40 meets the design requirements of large aperture, wide angle, and ultra-thin design. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0118] Table 9, which appears later, shows the values ​​corresponding to the various numerical values ​​and parameters specified in the conditional expressions in each of the first, second, third, and fourth implementation methods.

[0119] Table 9

[0120] 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 is arranged in the following order from the object side to the image side: 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 negative refractive power, and a fifth lens with positive refractive power. Wherein, the focal length of the camera optical lens is f, the total optical length of the camera optical lens is TTL, the axial distance from the image-side surface of the first lens to the object-side surface of the second lens is d2, 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, and the central radius of curvature of the image-side surface of the fourth lens is R8, and the following relationship is satisfied: 0.75≤TTL / f≤0.84; 2.99≤(d² / f)*100≤15.00; -0.40≤f4 / (R7-R8)≤-0.

05.

2. The camera optical lens according to claim 1, characterized in that, The image height of the camera optical lens is IH, and satisfies the following relationship: 65.49≤(43.25 / (2*IH))*f≤71.

5.

3. The camera optical lens according to claim 1, wherein, The focal length of the fifth lens is f5, and it satisfies the following relationship: -1.05≤f4 / f5≤-0.

40.

4. The camera optical lens according to claim 3, characterized in that, -1.03≤f4 / f5≤-0.

40.

5. The camera optical lens according to claim 1, characterized in that, The object-side surface of the first lens is convex near the axis; 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: 0.44≤f1 / f≤0.49; -1.04≤(R1+R2) / (R1-R2)≤-0.77; 0.145≤d1 / TTL≤0.

244.

6. 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: -1.43≤f² / f≤-0.65; 1.53≤(R3+R4) / (R3-R4)≤2.82; 0.026≤d3 / TTL≤0.

033.

7. The camera optical lens according to claim 1, characterized in that, The image-side surface of the third lens is concave at the paraxial position; The focal length of the third lens is f3, 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 axial thickness of the third lens is d5, and the following relationship is satisfied: -1.20≤f3 / f≤-0.83; 0.73≤(R5+R6) / (R5-R6)≤1.80; 0.028≤d5 / TTL≤0.

039.

8. 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 an on-axis thickness of d7 and satisfies the following relationship: -0.76≤f4 / f≤-0.32; -1.37≤(R7+R8) / (R7-R8)≤-1.05; 0.026≤d7 / TTL≤0.

038.

9. The camera optical lens according to claim 1, characterized in that, The image-side surface of the fifth lens is convex 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: 0.31≤f5 / f≤1.90; -0.34≤(R9+R10) / (R9-R10)≤1.98; 0.111≤d9 / TTL≤0.

163.

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

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