Shooting optical lens

Abstract

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens which is sequentially provided with a first lens with positive refraction power, a second lens with negative refraction power, a third lens with negative refraction power, a fourth lens with negative refraction power and a fifth lens with positive refraction power from the object side to the image side. Wherein the focal length of the shooting optical lens is f, the optical total length of the shooting 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 curvature radius of the object side surface of the fourth lens is R7, and the central curvature radius of the image side surface of the fourth lens is R8, the following relational expression is satisfied: TTL / f is more than or equal to 0.75 and less than or equal to 0.84; 2.99 < = (d2 / f) * 100 < = 15.00; -0.40 < = f4 / (R7-R8) < =-0.05.

Description

Technical Field

[0001] The present invention relates to the field of optical lenses, and in particular to a camera optical lens suitable for portable terminal devices such as smart phones and digital cameras, as well as camera devices such as monitors and PC lenses. Background Art

[0002] In recent years, with the rise of various smart devices, the demand for miniaturized camera optical lenses has been increasing. Due to the reduction in the pixel size of photosensitive devices and the trend of today's electronic products to have good functions and a thin and portable appearance, miniaturized camera optical lenses with good imaging quality have become the mainstream in the current market. In order to obtain better imaging quality, a multi-piece lens structure is often used. In addition, with the development of technology and the increase in the diversified needs of users, as the pixel area of ​​photosensitive devices continues to shrink and the system's requirements for imaging quality continue to increase, a five-piece lens structure has gradually appeared in lens design. There is an urgent need for wide-angle camera optical lenses with excellent optical characteristics, small size, and fully corrected aberrations. Summary of the invention

[0003] In view of the above problems, the main purpose of the present invention is to provide a camera optical lens, which has good optical performance and meets the design requirements of large aperture, ultra-thinness and wide angle.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention provides a camera optical lens, which is configured in sequence 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 curvature radius of the object side surface of the fourth lens is R7, the central curvature radius of the image side surface of the fourth lens is R8, and the following relationship is satisfied: 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 at the paraxial position; the focal length of the first lens is f1, the central curvature radius of the object side surface of the first lens is R1, the central curvature radius of the image side surface of the first lens is R2, 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 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 curvature radius of the object side surface of the second lens is R3, the central curvature radius of the image side surface of the second lens is R4, the axial thickness of the second lens is d3, and the following relationships are satisfied: -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 at the paraxial position; the focal length of the third lens is f3, 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 axial thickness of the third lens is d5, and the following relationships are satisfied: -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 at the paraxial position, and the image side surface of the fourth lens is convex at the paraxial position; the axial thickness of the fourth lens is 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.

[0012] Preferably, the image side surface of the fifth lens is convex at the paraxial position; the focal length of the fifth lens is f5, the central curvature radius of the object side surface of the fifth lens is R9, the central curvature radius of the image side surface of the fifth lens is R10, 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 properties, and has the characteristics of large aperture, wide angle, and ultra-thinness, and is particularly suitable for mobile phone camera optical lens assemblies and WEB camera optical lenses composed of high-pixel CCD, CMOS and other camera elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 work, among which:

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

[0017] Figure 2 yes Figure 1 Schematic diagram of axial aberration of the camera optical lens shown;

[0018] Figure 3 yes Figure 1 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0019] Figure 4 yes Figure 1 Schematic diagram of field curvature and distortion of the camera optical lens shown;

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

[0021] Figure 6 yes Figure 5 Schematic diagram of axial aberration of the camera optical lens shown;

[0022] Figure 7 yes Figure 5 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0023] Figure 8 yes Figure 5 Schematic diagram of field curvature and distortion of the camera optical lens shown;

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

[0025] Fig.10 yes Fig. 9 Schematic diagram of axial aberration of the camera optical lens shown;

[0026] Fig.11 yes Fig. 9Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0027] Fig.12 yes Fig. 9 Schematic diagram of field curvature and distortion of the camera optical lens shown;

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

[0029] Fig.14 yes Fig.13 Schematic diagram of axial aberration of the camera optical lens shown;

[0030] Fig.15 yes Fig.13 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0031] Fig.16 yes Fig.13 Schematic diagram of field curvature and distortion of the camera optical lens shown. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the embodiments of the present invention, many technical details are provided to enable readers to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present invention can be implemented.

[0033] With reference to the accompanying drawings, the technical solution of the present invention provides an imaging optical lens 10 , 20 , 30 , 40 . Figure 1 , 5 , 9, and 13 show the imaging optical lenses 10, 20, 30, and 40 of the present invention, which are sequentially configured 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, and a fifth lens L5. An optical element such as an optical filter GF may be provided between the fifth lens L5 and the image plane Si.

[0034] The focal length of the camera optical lens 10, 20, 30, 40 is defined as f, and the total optical length of the camera optical lens 10, 20, 30, 40 is TTL, satisfying the following relationship: 0.75≤TTL / f≤0.84, which specifies the ratio of the total optical length of the camera optical lens 10, 20, 30, 40 to the focal length of the camera optical lens 10, 20, 30, 40. By setting the upper limit of the conditional expression, the total optical length of the camera optical lens 10, 20, 30, 40 can be controlled to be shorter, and the miniaturization of the camera optical lens 10, 20, 30, 40 can be easily realized; by setting the lower limit of the conditional expression, it is beneficial to correct distortion and axial chromatic aberration, and can also maintain good optical performance.

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

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

[0037] When the above conditions are met, the camera optical lenses 10, 20, 30, 40 have good optical performance and can meet the design requirements of large aperture, wide angle and ultra-thinness. According to the characteristics of the camera optical lenses 10, 20, 30, 40, the camera optical lenses 10, 20, 30, 40 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 stipulates that the equivalent focal length of the optical imaging system for a full-frame sensor can meet the golden focal length for shooting portraits within the range specified by the conditional expression.

[0040] The focal length of the fourth lens L4 is defined as f4, the focal length of the fifth lens L5 is defined as f5, and the following relationship is satisfied: -1.05≤f4 / f5≤-0.4, which specifies the ratio of the focal length of the fourth lens L4 to the focal length of the fifth lens L5. By reasonably allocating the optical focal length of the optical system, the optical system has 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 at the paraxial position, the image side surface of the first lens L1 is concave or convex at the paraxial position, and the first lens L1 has positive refractive power. The object side surface of the first lens L1 can also be set to other concave or convex distributions.

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

[0043] The central curvature radius of the object side surface of the first lens L1 is defined as R1, and the central curvature radius of the image side surface of the first lens L1 is defined as R2, which satisfy the following relationship: -1.04≤(R1+R2) / (R1-R2)≤-0.77, which specifies the ratio of the sum of the central curvature radius R1 of the object side surface of the first lens L1 and the central curvature radius R2 of the image side surface of the first lens L1 to the difference between the central curvature radius R1 of the object side surface of the first lens L1 and the central curvature radius R2 of the image side surface of the first lens L1, and limits the shape of the first lens L1. Within the range specified by the conditional expression, the first lens L1 can effectively correct the system spherical aberration.

[0044] The axial thickness of the first lens L1 is d1, and the total optical length of the camera optical lenses 10, 20, 30, and 40 is TTL, which satisfies the following relationship: 0.145≤d1 / TTL≤0.244. Within the conditional range, it is conducive to achieving ultra-thinness.

[0045] The object side surface of the second lens L2 is convex at the paraxial position, the image side surface of the second lens L2 is concave at the paraxial position, and the second lens L2 has positive refractive power. The object side surface and the image side surface of the second lens L2 can also be set to other concave and convex distributions.

[0046] The focal length of the imaging optical lenses 10, 20, 30, and 40 is 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, which specifies the ratio of the focal length of the second lens L2 to the focal length of the imaging optical lenses 10, 20, 30, and 40. By controlling the positive focal power of the second lens L2 within a reasonable range, it is beneficial to correct the aberration of the optical system.

[0047] The central curvature radius of the object side surface of the second lens L2 is R3, and the central curvature radius of the image side surface of the second lens L2 is R4, which satisfy the following relationship: 1.53≤(R3+R4) / (R3-R4)≤2.82, which specifies the ratio of the sum of the central curvature radius R3 of the object side surface of the second lens L2 and the central curvature radius R4 of the image side surface of the second lens L2 to the difference between the central curvature radius R3 of the object side surface of the second lens L2 and the central curvature radius R4 of the image side surface of the second lens L2, and limits the shape of the second lens L2. Within the range specified by the conditional expression, it is beneficial to correct the axial chromatic aberration problem, improve image clarity, reduce image color distortion, and improve imaging quality.

[0048] The axial thickness of the second lens L2 is d3, and the total optical length of the camera optical lenses 10, 20, 30, 40 is TTL, which satisfies the following relationship: 0.026≤d3 / TTL≤0.033. Within the range of the conditional expression, it is conducive to achieving ultra-thinness.

[0049] The object side surface of the third lens L3 is convex or concave at the paraxial position, the image side surface of the third lens L3 is concave at the paraxial position, and the third lens L3 has negative refractive power. The image side surface of the third lens L3 can also be set to other concave or convex distributions.

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

[0051] The central curvature radius of the object side surface of the third lens L3 is R5, and the central curvature radius of the image side surface of the third lens L3 is R6, which satisfy the following relationship: 0.73≤(R5+R6) / (R5-R6)≤1.80, which specifies the ratio of the sum of the central curvature radius R5 of the object side surface of the third lens L3 and the central curvature radius R6 of the image side surface of the third lens L3 to the difference between the central curvature radius R5 of the object side surface of the third lens L3 and the central curvature radius R6 of the image side surface of the third lens L3, and limits the shape of the third lens L3. Within the range specified by the conditional expression, the degree of deflection of light passing through the lens is effectively alleviated, aberrations are reduced, and the imaging quality of the ultra-thin wide-angle lens is improved.

[0052] The axial 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, which satisfies the following relationship: 0.028≤d5 / TTL≤0.039. Within the range of the conditional expression, it is conducive to achieving ultra-thinness.

[0053] The object side surface of the fourth lens L4 is concave at the paraxial position, the image side surface of the fourth lens L4 is convex at the paraxial position, 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 set to other concave and convex distributions.

[0054] The focal length of the camera optical lenses 10, 20, 30, and 40 is defined as f, and the focal length of the fourth lens L4 is defined as f4, which satisfies the following relationship: -0.76≤f4 / f≤-0.32, which specifies the ratio of the focal length of the fourth lens L4 to the focal length of the camera optical lenses 10, 20, 30, and 40. Within the range specified by the conditional expression, the light angle of the camera optical lens can be effectively smoothed, thereby reducing the tolerance sensitivity.

[0055] The central curvature radius of the object side surface of the fourth lens L4 is R7, and the central curvature radius of the image side surface of the fourth lens L4 is R8, and the following relationship is satisfied: -1.37≤(R7+R8) / (R7-R8)≤-1.05, which specifies the ratio of the sum of the central curvature radius R7 of the object side surface of the fourth lens L4 and the central curvature radius R8 of the image side surface of the fourth lens L4 to the difference between the central curvature radius R7 of the object side surface of the fourth lens L4 and the central curvature radius R8 of the image side surface of the fourth lens L4, and limits the shape of the fourth lens L4. Within the range specified by the conditional expression, it is beneficial to correct the axial chromatic aberration problem, improve image clarity, reduce image color distortion, and improve imaging quality.

[0056] The axial 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, which satisfies the following relationship: 0.026≤d7 / TTL≤0.038. Within the range of the conditional expression, it is conducive to achieving ultra-thinness.

[0057] The object side surface of the fifth lens L5 is concave or convex at the paraxial position, the image side surface of the fifth lens L5 is convex at the paraxial position, and the fifth lens L5 has negative refractive power. The image side surface of the fifth lens L5 can also be set to other concave or convex distributions.

[0058] The focal length of the imaging optical lenses 10, 20, 30, and 40 is defined as f, and the focal length of the fifth lens L5 is defined as f5, which satisfies the following relationship: 0.31≤f5 / f≤1.90, which specifies the ratio of the focal length of the fifth lens L5 to the focal length of the imaging optical lenses 10, 20, 30, and 40. Within the range specified by the conditional expression, it helps to improve the optical system performance.

[0059] The central curvature radius of the object side surface of the fifth lens L5 is R9, the central curvature radius of the image side surface of the fifth lens L5 is R10, and the following relationship is satisfied: -0.34≤(R9+R10) / (R9-R10)≤1.98, which specifies the ratio of the sum of the central curvature radius R9 of the object side surface of the fifth lens L5 and the central curvature radius R10 of the image side surface of the fifth lens L5 to the difference between the central curvature radius R9 of the object side surface of the fifth lens L5 and the central curvature radius R10 of the image side surface of the fifth lens L5, and limits the shape of the fifth lens L5. Within the range specified by the conditional expression, it is beneficial to correct the axial chromatic aberration problem, improve image clarity, reduce image color distortion, and improve imaging quality.

[0060] The axial thickness of the fifth lens L5 is d9, and the total optical length of the camera optical lenses 10, 20, 30, and 40 is TTL, which satisfies the following relationship: 0.111≤d9 / TTL≤0.163. Within the range of the conditional expression, it is conducive to achieving 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. Each lens may also be made of other materials.

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

[0063] The field of view angle FOV of the camera optical lenses 10, 20, 30, 40 at 1.0 field of view is greater than or equal to 32.29°, thereby achieving a wide angle.

[0064] The aperture value FNO of the camera optical lens 10, 20, 30, 40 is less than or equal to 2.57, thereby achieving a large aperture and good imaging performance of the camera optical lens. Preferably, the aperture value FNO of the camera optical lens 10, 20, 30, 40 is less than or equal to 2.52.

[0065] The following examples are used to illustrate the camera optical lens of the present invention. The symbols recorded in each example are as follows. The focal length, on-axis distance, central curvature radius, on-axis thickness, inflection point position, and stationary point position are in units of mm.

[0066] TTL: total optical length (the axial distance from the object side 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 of the camera optical lens to the entrance pupil diameter.

[0068] 1.0 Image height IH of the field of view: the height of the field of view corresponding to the effective pixel of the sensor (that is, half of 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 pixels of the sensor;

[0070] Image height IHm of MIC field of view: the field of view height expanded 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, an inflection point and / or a stagnation point may be provided on the object side and / or the image side of the lens to meet high-quality imaging requirements.

[0073] Next, the technical solution of the present invention is specifically described with four implementation modes.

[0074] (First Embodiment)

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

[0076] The second lens L2 has negative refractive power and is made of plastic, with its object side surface being convex at the near axis and its image side surface being concave at the near axis;

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

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

[0079] The fifth lens L5 has positive refractive power and is made of plastic. Its object-side surface is convex at the paraxial position, and its image-side surface is convex at the paraxial position.

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

[0081]

Table 1

[0082]

[0083]

[0084] The meaning of each symbol is as follows.

[0085] S1: aperture;

[0086] R: radius of curvature at the center of the optical surface;

[0087] R1: the central curvature radius of the object side of the first lens L1;

[0088] R2: the central curvature radius of the image side surface of the first lens L1;

[0089] R3: the central curvature radius of the object side surface of the second lens L2;

[0090] R4: the central curvature radius of the image side surface of the second lens L2;

[0091] R5: the central curvature radius of the object side surface of the third lens L3;

[0092] R6: the central curvature radius of the image side surface of the third lens L3;

[0093] R7: the central curvature radius of the object side surface of the fourth lens L4;

[0094] R8: the central curvature radius of the image side surface of the fourth lens L4;

[0095] R9: the central curvature radius of the object side surface of the fifth lens L5;

[0096] R10: the central curvature radius of the image side surface of the fifth lens L5;

[0097] R11: the central curvature radius of the object side of the optical filter GF;

[0098] R12: the central curvature radius of the image side of the optical filter GF;

[0099] d: the axial thickness of the lens, the axial distance between lenses;

[0100] d0: the axial distance from the aperture S1 to the object side of the first lens L1;

[0101] d1: axial thickness of the first lens L1;

[0102] d2: the axial distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

[0103] d3: axial thickness of the second lens L2;

[0104] d4: the axial distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

[0105] d5: axial thickness of the third lens L3;

[0106] d6: the axial distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

[0107] d7: axial thickness of the fourth lens L4;

[0108] d8: the axial distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

[0109] d9: axial thickness of the fifth lens L5;

[0110] d10: the axial distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;

[0111] d11: axial thickness of the optical filter GF;

[0112] d12: the axial distance from the image side of the optical filter GF to the image surface Si;

[0113] nd: refractive index of d-line (d-line is green light with a wavelength of 550nm);

[0114] nd1: refractive index of the first lens L1 at the d-line;

[0115] nd2: refractive index of the d-line of the second lens L2;

[0116] nd3: refractive index of the third lens L3 at the d-line;

[0117] nd4: refractive index of the d-line of the fourth lens L4;

[0118] nd5: the refractive index of the fifth lens L5 at the d-line;

[0119] ndg: refractive index of the d-line of the optical filter GF;

[0120] vd: Abbe number;

[0121] v1: Abbe number of the first lens L1;

[0122] v2: Abbe number of the second lens L2;

[0123] v3: Abbe number of the third lens L3;

[0124] v4: Abbe number of the fourth lens L4;

[0125] v5: Abbe number of the fifth lens L5;

[0126] vg: Abbe number of the optical filter GF.

[0127] Table 2 shows aspherical surface data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention.

[0128]

Table 2

[0129]

[0130] For convenience, the aspheric surface of each lens surface uses the aspheric surface shown in the following formula (1). However, the present invention is not limited to the aspheric surface polynomial form represented by the formula (1).

[0131] z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r

[0132] 14 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0133] Where, k is the cone coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 are aspheric coefficients, c is the curvature at the center of the optical surface, r is the vertical distance between the point on the aspheric curve and the optical axis, and z is the aspheric depth (the vertical distance between the point on the aspheric surface that is r away from the optical axis and the tangent plane tangent to the vertex on the aspheric optical axis).

[0134] Figure 2 , Figure 3Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 656 nm, 587 nm, 546 nm, 486 nm, and 436 nm after passing through the imaging optical lens 10 of the first embodiment are shown respectively. Figure 4 FIG. 4 shows a schematic diagram of field curvature and distortion of light having a wavelength of 546 nm after passing 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.

[0135] 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 angle 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 angle 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-thinness, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0136] (Second Embodiment)

[0137] The meanings of the symbols in the second embodiment are the same as those in the first embodiment.

[0138] Different from the first embodiment, in this embodiment, the object-side surface of the third lens L3 is a concave surface at the paraxial position; and the object-side surface of the fifth lens L5 is a concave surface at the paraxial position.

[0139] Figure 5 FIG. 2 shows an imaging optical lens 20 according to a second embodiment of the present invention.

[0140] Table 3 shows design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0141]

Table 3

[0142]

[0143] Table 4 shows aspherical surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[0144]

Table 4

[0145]

[0146]

[0147] Figure 6 , Figure 7 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 656 nm, 587 nm, 546 nm, 486 nm, and 436 nm after passing through the imaging optical lens 20 of the second embodiment are shown respectively. Figure 8 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging 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.

[0148] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 3.035 mm, the image height IH of the 1.0 field of view is 2.500 mm, the field angle FOV of the 1.0 field of view is 35.53°, the image height IHm of the MIC field of view is 2.650 mm, and the field angle 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-thinness, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0149] (Third Embodiment)

[0150] The meanings of the symbols in the third embodiment are the same as those in the first embodiment.

[0151] Different from the first embodiment, in this embodiment, the image side surface of the first lens L1 is a concave surface at the paraxial position.

[0152] Fig. 9 FIG. 1 shows an imaging optical lens 30 according to a third embodiment of the present invention.

[0153] Table 5 shows design data of the imaging optical lens 30 according to the third embodiment of the present invention.

[0154]

Table 5

[0155]

[0156] Table 6 shows aspherical surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.

[0157]

Table 6

[0158]

[0159]

[0160] Fig.10 , Fig.11 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 656 nm, 587 nm, 546 nm, 486 nm, and 436 nm after passing through the imaging optical lens 30 of the third embodiment are shown respectively. Fig.12 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 30 of the third embodiment. Fig.12 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0161] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 3.197 mm, the image height IH of the 1.0 field of view is 2.420 mm, the field angle FOV of the 1.0 field of view is 33.91°, the image height IHm of the MIC field of view is 2.570 mm, and the field angle 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-thinness, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0162] (Fourth Embodiment)

[0163] The meanings of symbols in the fourth embodiment are the same as those in the first embodiment.

[0164] Fig. 9 FIG. 4 shows an imaging optical lens 40 according to a fourth embodiment of the present invention.

[0165] Table 7 shows design data of the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0166]

Table 7

[0167]

[0168]

[0169] Table 8 shows aspherical surface data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0170]

Table 8

[0171]

[0172]

[0173] Fig.10 , Fig.11 Schematic diagrams showing axial aberration and chromatic aberration of magnification of light with wavelengths of 656 nm, 587 nm, 546 nm, 486 nm, and 436 nm after passing through the imaging optical lens 40 of the fourth embodiment are shown respectively. Fig.12 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 40 of the fourth embodiment. Fig.12 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0174] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 3.197 mm, the image height IH of the 1.0 field of view is 2.500 mm, the field angle FOV of the 1.0 field of view is 32.29°, the image height IHm of the MIC field of view is 2.590 mm, and the field angle 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-thinness, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0175] Table 9 that appears later shows the values ​​corresponding to the parameters specified in the conditional expressions and various numerical values ​​in each of the first, second, third, and fourth embodiments.

[0176]

Table 9

[0177] Parameters and Conditionals Implementation Method 1 Implementation Method 2 Implementation 3 Implementation 4 TTL / f 0.82 0.84 0.77 0.83 f4 / (R7-R8) -0.16 -0.40 -0.05 -0.05 (d2 / f)*100 9.22 3.00 12.54 14.72 (43.25 / (2*IH))*f 65.57 65.50 71.28 68.99 f4 / f5 -0.79 -0.40 -0.84 -1.02 f 7.580 7.572 7.977 7.976 f1 3.489 3.499 3.533 3.855 f2 -7.144 -10.757 -5.229 -6.178 f3 -7.725 -6.297 -8.875 -9.508 f4 -4.572 -5.747 -4.214 -2.562 f5 5.767 14.367 5.000 2.502 FNO 2.495 2.495 2.495 2.495 TTL 6.200 6.360 6.143 6.600 IH 2.500 2.500 2.420 2.500 FOV 36.10° 35.53° 33.91° 32.29°

[0178] Those skilled in the art will appreciate that the above-mentioned embodiments are specific embodiments for implementing the present invention, and in actual applications, various changes may be made thereto 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 sequentially configured 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; Among them, 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 curvature radius of the object side surface of the fourth lens is R7, the central curvature radius 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 imaging 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 imaging optical lens according to claim 1, characterized in that: The focal length of the fifth lens is f5, and satisfies the following relationship: -1.05≤f4 / f5≤-0.

40.

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

40.

5. The imaging optical lens according to claim 1, wherein: The object side surface of the first lens is convex at the paraxial position; The focal length of the first lens is f1, the central curvature radius of the object side of the first lens is R1, the central curvature radius of the image side of the first lens is R2, 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 imaging 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 curvature radius of the object side of the second lens is R3, the central curvature radius of the image side of the second lens is R4, the axial thickness of the second lens is d3, and the following relationship is satisfied: -1.43≤f2 / f≤-0.65; 1.53≤(R3+R4) / (R3-R4)≤2.82; 0.026≤d3 / TTL≤0.

033.

7. The imaging 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 curvature radius of the object side of the third lens is R5, the central curvature radius of the image side of the third lens is R6, 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 imaging optical lens according to claim 1, characterized in that: The object side surface of the fourth lens is concave at the paraxial position, and the image side surface of the fourth lens is convex at the paraxial position; The axial thickness of the fourth lens is 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 imaging optical lens according to claim 1, characterized in that: The image side surface of the fifth lens is convex at the paraxial position; The focal length of the fifth lens is f5, the central curvature radius of the object side of the fifth lens is R9, the central curvature radius of the image side of the fifth lens is R10, the axial thickness of the fifth lens is d9, and the following relationship is satisfied: 0.31≤f5 / f≤1.90; -0.34≤(R9+R10) / (R9-R10)≤1.98; 0.111≤d9 / TTL≤0.

163.

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

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