Shooting optical lens

Abstract

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens, which comprises five lenses, the five lenses are sequentially a first lens with negative refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power and a fifth lens with negative refractive power from the object side to the image side; wherein the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the curvature radius of the object side surface of the first lens is R1, the curvature radius of the image side surface of the first lens is R2, the curvature radius of the object side surface of the third lens is R5, and the curvature radius of the image side surface of the third lens is R6, the following relational expressions are satisfied:-1.00 < = f3 / (R5 + R6) < =-0.30; -0.65 < = (R1 + R2) / (R1-R2) < =-0.25; f1 / f2 is greater than or equal to-8.00 and less than or equal to-4.00.

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 user's diversified needs, 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 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 comprises a total of five lenses, and the five lenses are, from the object side to the image side, in order: a first lens with negative refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power; wherein, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the radius of curvature of the object side surface of the first lens is R1, the radius of curvature of the image side surface of the first lens is R2, the radius of curvature of the object side surface of the third lens is R5, and the radius of curvature of the image side surface of the third lens is R6, and the following relationship is satisfied: -1.00≤f3 / (R5+R6)≤-0.30; -0.65≤(R1+R2) / (R1-R2)≤-0.25; -8.00≤f1 / f2≤-4.00.

[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 camera optical lens is f, and the following relationship is satisfied: 1.40≤(f4-f5) / f≤2.40.

[0006] Preferably, the air interval between the first lens and the second lens is T12, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.09≤T12 / TTL≤0.14.

[0007] Preferably, the combined focal length of the second lens and the third lens is f23, the center thickness of the second lens on the optical axis is T2, the center thickness of the third lens on the optical axis is T3, the air interval between the second lens and the third lens is T23, and the following relationship is satisfied: 4.00≤f23 / (T2+T23+T3)≤6.00.

[0008] Preferably, the object side surface of the first lens is concave at the paraxial position, and the image side surface of the first lens is concave at the paraxial position; the focal length of the imaging optical lens is f, the axial thickness of the first lens is d1, the total optical length of the imaging optical lens is TTL, and the following relationships are satisfied: -9.59≤f1 / f≤-5.92; 0.06≤d1 / TTL≤0.07.

[0009] Preferably, the image side surface of the second lens is convex at the paraxial position; the focal length of the camera optical lens is f, the radius of curvature of the object side surface of the second lens is R3, the radius of curvature of the image side surface of the second lens is R4, the axial thickness of the second lens is d3, the total optical length of the camera optical lens is TTL, and the following relationships are satisfied: 1.20≤f2 / f≤1.48; 0.89≤(R3+R4) / (R3-R4)≤1.01; 0.12≤d3 / TTL≤0.16.

[0010] Preferably, 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 focal length of the imaging optical lens is f, the axial thickness of the third lens is d5, the total optical length of the imaging optical lens is TTL, and the following relationships are satisfied: -4.09≤f3 / f≤-2.86; 1.50≤(R5+R6) / (R5-R6)≤2.95; 0.05≤d5 / TTL≤0.06.

[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 focal length of the fourth lens is f4, the focal length of the camera optical lens is f, the radius of curvature of the object side surface of the fourth lens is R7, the radius of curvature of the image side surface of the fourth lens is R8, the axial thickness of the fourth lens is d7, the total optical length of the camera optical lens is TTL, and the following relationships are satisfied: 0.68≤f4 / f≤0.86; 1.48≤(R7+R8) / (R7-R8)≤1.85; 0.17≤d7 / TTL≤0.21.

[0012] Preferably, the object side surface of the fifth lens is convex at the paraxial position, and the image side surface of the fifth lens is concave at the paraxial position; the focal length of the fifth lens is f5, the focal length of the imaging optical lens is f, the radius of curvature of the object side surface of the fifth lens is R9, the radius of curvature of the image side surface of the fifth lens is R10, the axial thickness of the fifth lens is d9, the total optical length of the imaging optical lens is TTL, and the following relationships are satisfied: -1.53≤f5 / f≤-0.72; 1.75≤(R9+R10) / (R9-R10)≤3.28; 0.07≤d9 / TTL≤0.12.

[0013] Preferably, FN0 represents the aperture number of the camera optical lens and satisfies the following relationship:

[0014] FN0≤2.25.

[0015] 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 lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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:

[0017] Figure 1 is a schematic structural diagram of an imaging optical lens according to a first embodiment of the present invention;

[0018] Figure 2 yes Figure 1 Schematic diagram of axial aberration of the camera optical lens shown;

[0019] Figure 3 yes Figure 1 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0020] Figure 4 yes Figure 1 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0021] Figure 5 is a schematic structural diagram of an imaging optical lens according to a second embodiment of the present invention;

[0022] Figure 6 yes Figure 5Schematic diagram of axial aberration of the camera optical lens shown;

[0023] Figure 7 yes Figure 5 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0024] Figure 8 yes Figure 5 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0025] Fig. 9 is a schematic structural diagram of a camera optical lens according to a third embodiment of the present invention;

[0026] Fig.10 yes Fig. 9 Schematic diagram of axial aberration of the camera optical lens shown;

[0027] Fig.11 yes Fig. 9 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0028] Fig.12 yes Fig. 9 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0029] Fig.13 is a schematic structural diagram of a camera optical lens according to a fourth embodiment of the present invention;

[0030] Fig.14 yes Fig.13 Schematic diagram of axial aberration of the camera optical lens shown;

[0031] Fig.15 yes Fig.13 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0032] Fig.16 yes Fig.13 Schematic diagram of field curvature and distortion of the camera optical lens shown;

[0033] Fig.17 is a schematic structural diagram of a camera optical lens according to a comparative implementation mode;

[0034] Fig.18 yes Fig.17 Schematic diagram of axial aberration of the camera optical lens shown;

[0035] Fig.19 yes Fig.17 Schematic diagram of magnification chromatic aberration of the camera optical lens shown;

[0036] Fig. 20 yes Fig.17 Schematic diagram of field curvature and distortion of the camera optical lens shown. DETAILED DESCRIPTION

[0037] 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.

[0038] 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 camera optical lenses 10, 20, 30, and 40 of the present invention, which include five lenses in total. Specifically, the camera optical lenses include, from the object side to the image side, a first lens L1, an aperture S1, 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.

[0039] The first lens L1 is made of plastic material, the second lens L2 is made of plastic material, the third lens L3 is made of plastic material, the fourth lens L4 is made of plastic material, and the fifth lens L5 is made of plastic material. Each lens may also be made of other materials.

[0040] It is defined that the third lens L3 has negative refractive power, the focal length of the third lens L3 is f3, the radius of curvature of the object side surface of the third lens L3 is R5, and the radius of curvature of the image side surface of the third lens L3 is R6, which satisfy the following relationship: -1.00≤f3 / (R5+R6)≤-0.30, and the surface shape of the third lens L3 can be reasonably controlled. Within this range, the chromatic aberration can be effectively corrected to make the chromatic aberration |LC|≤4.0μm.

[0041] The curvature radius of the object side surface of the first lens L1 is defined as R1, and the curvature radius of the image side surface of the first lens L1 is defined as R2, which satisfy the following relationship: -0.65≤(R1+R2) / (R1-R2)≤-0.25. The surface shape of the first lens L1 can be reasonably controlled, which helps to reduce the sensitivity of the system and also can reduce the stray light generated by the lens and improve the imaging quality of the lens.

[0042] The focal length of the first lens L1 is defined as f1, and the focal length of the second lens L2 is defined as f2, satisfying the following relationship: -8.00≤f1 / f2≤-4.00, which specifies the ratio of the focal lengths of the first lens L1 and the second lens L2. By reasonably allocating the optical focal lengths of the system, the system has better imaging quality and lower sensitivity.

[0043] 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 focal length of the camera optical lens is defined as f, satisfying the following relationship: 1.40≤(f4-f5) / f≤2.40. By reasonably allocating the optical focal length of the distribution system, the system has better imaging quality and lower sensitivity.

[0044] The air gap between the first lens L1 and the second lens L2 is defined as T12, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship: 0.09≤T12 / TTL≤0.14, which specifies the ratio of the air gap between the first lens L1 and the second lens L2 to the total length of the system, and reasonably allocates the proportion of the lens thickness, which helps to achieve ultra-thinness.

[0045] The combined focal length of the second lens L2 and the third lens L3 is defined as f23, the center thickness of the second lens L2 on the optical axis is T2, the center thickness of the third lens L3 on the optical axis is T3, the air interval between the second lens L2 and the third lens L3 is T23, and 4.00≤f23 / (T2+T23+T3)≤6.00. When the conditional expression satisfies the above conditions, it is helpful to maintain a sufficient refractive power to correct the off-axis aberration at the image side end, and at the same time, the total optical length can be effectively shortened to achieve the purpose of miniaturization, thereby expanding the application range of the product.

[0046] 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 lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.

[0047] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further detailed as follows.

[0048] The object side surface of the first lens L1 is concave at the paraxial position, and the image side surface is concave at the paraxial position, and the first lens L1 has negative refractive power. The object side surface and the image side surface of the first lens L1 can also be set to other concave or convex distributions.

[0049] The focal length of the camera optical lens is defined as f, which satisfies the following relationship: -9.59≤f1 / f≤-5.92, which specifies the ratio of the focal length of the first lens L1 to the overall focal length. Within the specified range, the first lens L1 has an appropriate negative refractive power, which is beneficial to reducing system aberrations and is also beneficial to the development of ultra-thin and wide-angle lenses.

[0050] The axial thickness of the first lens L1 is d1, and the total optical length of the camera optical lens is TTL, which satisfies the following relationship: 0.06≤d1 / TTL≤0.07, which is conducive to achieving ultra-thinness.

[0051] The second lens L2 has positive refractive power, the object side surface of the second lens L2 is concave or convex at the paraxial position, and the image side surface of the second lens L2 is convex at the paraxial position. The object side surface and image side surface of the second lens L2 can also be set to other concave or convex distributions.

[0052] The focal length of the camera optical lens 10 is defined as f, and the focal length of the second lens L2 is defined as f2, satisfying the following relationship: 1.20≤f2 / f≤1.48. By controlling the positive focal length of the second lens L2 within a reasonable range, it is beneficial to correct the aberration of the optical system. The central curvature radius of the object side of the second lens L2 is R3, and the central curvature radius of the image side of the second lens L2 is R4, satisfying the following relationship: 0.89≤(R3+R4) / (R3-R4)≤1.01, which specifies the shape of the second lens L2. When within the range, as the lens develops towards ultra-thin wide-angle, it is beneficial to correct the axial chromatic aberration problem. The axial thickness of the second lens L2 is d3, and the total optical length of the camera optical lens 10 is TTL, satisfying the following relationship: 0.12≤d3 / TTL≤0.16. Within the conditional range, it is beneficial to achieve ultra-thinness.

[0053] The object side surface of the third lens L3 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and the third lens L3 has negative refractive power. The object side surface and the image side surface of the third lens L3 can also be set to other concave and convex distributions.

[0054] The focal length of the camera optical lens 10 is defined as f, and the focal length of the third lens L3 is defined as f3, which satisfies the following relationship: -4.09≤f3 / f≤-2.86. Through the reasonable distribution of the focal power, the system has better imaging quality and lower sensitivity. The central curvature radius of the object side of the third lens L3 is R5, and the central curvature radius of the image side of the third lens L3 is R6, which satisfies the following relationship: 1.50≤(R5+R6) / (R5-R6)≤2.95, which specifies the shape of the third lens L3, is conducive to the molding of the third lens L3, and within the range specified by the conditional formula, the degree of deflection of light passing through the lens can be alleviated, effectively reducing aberrations. The axial thickness of the third lens L3 is d5, and the total optical length of the camera optical lens 10 is TTL, which satisfies the following relationship: 0.05≤d5 / TTL≤0.06. Within the range of the conditional formula, it is conducive to achieving ultra-thinness.

[0055] The object side surface of the fourth lens L4 is concave at the paraxial position, and the image side surface 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.

[0056] The focal length of the camera optical lens 10 is defined as f, and the focal length of the fourth lens L4 is defined as f4, which satisfies the following relationship: 0.68≤f4 / f≤0.86. Through the reasonable distribution of the focal power, the system has better imaging quality and lower sensitivity. The central curvature radius of the object side of the fourth lens L4 is R7, and the central curvature radius of the image side of the fourth lens L4 is R8, and the following relationship is satisfied: 1.48≤(R7+R8) / (R7-R8)≤1.85, which specifies the shape of the fourth lens L4. When it is within the range, with the development of ultra-thin wide-angle, it is conducive to correcting the aberration of the off-axis picture angle and other problems. The on-axis thickness of the fourth lens L4 is d7, and the total optical length of the camera optical lens 10 is TTL, which satisfies the following relationship: 0.17≤d7 / TTL≤0.21. Within the conditional range, it is conducive to achieving ultra-thinness. The object side surface of the fifth lens L5 is convex at the paraxial position, and the image side surface is concave at the paraxial position, and the fifth lens L5 has negative refractive power. The object side surface and the image side surface of the fifth lens L5 can also be set to other concave and convex distributions.

[0057] The focal length of the camera optical lens 10 is defined as f, and the focal length of the fifth lens L5 is defined as f5, which satisfies the following relationship: -1.53≤f5 / f≤-0.72. The limitation of the fifth lens L5 can effectively make the light angle of the camera optical lens 10 smooth and reduce the tolerance sensitivity. The central curvature radius of the object side of the fifth lens L5 is R9, and the central curvature radius of the image side of the fifth lens L5 is R10, and the following relationship is satisfied: 1.75≤(R9+R10) / (R9-R10)≤3.28, which stipulates the shape of the fifth lens L5. When it is within the range, with the development of ultra-thin wide-angle, it is conducive to correcting the aberration of the off-axis picture angle and other problems. The on-axis thickness of the fifth lens L5 is d9, and the total optical length of the camera optical lens 10 is TTL, which satisfies the following relationship: 0.07≤d9 / TTL≤0.12. Within the conditional range, it is conducive to achieving ultra-thinness.

[0058] The aperture value FNO of the camera optical lens 10 is less than or equal to 2.25, thereby achieving a large aperture and good imaging performance of the camera optical lens.

[0059] 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.

[0060] TTL: total optical length (the axial distance from the object side of the first lens L1 to the image surface Si), in mm;

[0061] Aperture value FNO: refers to the ratio of the effective focal length of the camera optical lens to the entrance pupil diameter.

[0062] 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);

[0063] 1.0 Field of view FOV: the field of view angle corresponding to the effective pixels of the sensor;

[0064] Image height IHm of MIC field of view: the field of view height expanded beyond 1.0 to prevent assembly deviation;

[0065] FOVm: the field of view angle corresponding to the image height of the MIC field of view;

[0066] 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.

[0067] Next, the technical solution of the present invention is specifically described with four implementation modes. At the same time, a comparative implementation mode is provided as a reference. When the scope of the above conditional formula is exceeded, the technical effect of the present invention cannot be achieved.

[0068] (First Embodiment)

[0069] Table 1 and Table 2 show design data of the imaging optical lens 10 according to the first embodiment of the present invention.

[0070]

Table 1

[0071]

[0072] The meaning of each symbol is as follows.

[0073] S1: aperture;

[0074] R: radius of curvature at the center of the optical surface;

[0075] R1: the central curvature radius of the object side of the first lens L1;

[0076] R2: the central curvature radius of the image side surface of the first lens L1;

[0077] R3: the central curvature radius of the object side surface of the second lens L2;

[0078] R4: the central curvature radius of the image side surface of the second lens L2;

[0079] R5: the central curvature radius of the object side surface of the third lens L3;

[0080] R6: the central curvature radius of the image side surface of the third lens L3;

[0081] R7: the central curvature radius of the object side surface of the fourth lens L4;

[0082] R8: the central curvature radius of the image side surface of the fourth lens L4;

[0083] R9: the central curvature radius of the object side surface of the fifth lens L5;

[0084] R10: the central curvature radius of the image side surface of the fifth lens L5;

[0085] R11: radius of curvature of the object side of the optical filter GF;

[0086] R12: radius of curvature of the image side of the optical filter GF;

[0087] d: the axial thickness of the lens, the axial distance between lenses;

[0088] d0: the axial distance from the aperture S1 to the object side of the first lens L1;

[0089] d1: axial thickness of the first lens L1;

[0090] d2: the axial distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

[0091] d3: axial thickness of the second lens L2;

[0092] d4: the axial distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

[0093] d5: axial thickness of the third lens L3;

[0094] d6: the axial distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

[0095] d7: axial thickness of the fourth lens L4;

[0096] d8: the axial distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

[0097] d9: axial thickness of the fifth lens L5;

[0098] d10: the axial distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;

[0099] d11: axial thickness of the optical filter GF;

[0100] d12: the axial distance from the image side of the optical filter GF to the image surface Si;

[0101] nd: refractive index of d-line (d-line is green light with a wavelength of 550nm);

[0102] nd1: refractive index of the first lens L1 at the d-line;

[0103] nd2: refractive index of the d-line of the second lens L2;

[0104] nd3: refractive index of the third lens L3 at the d-line;

[0105] nd4: refractive index of the d-line of the fourth lens L4;

[0106] nd5: the refractive index of the fifth lens L5 at the d-line;

[0107] ndg: refractive index of the d-line of the optical filter GF;

[0108] vd: Abbe number;

[0109] vd1: Abbe number of the first lens L1;

[0110] vd2: Abbe number of the second lens L2;

[0111] vd3: Abbe number of the third lens L3;

[0112] vd4: Abbe number of the fourth lens L4;

[0113] vd5: Abbe number of the fifth lens L5;

[0114] vdg: Abbe number of the optical filter GF.

[0115] Table 2 shows aspherical surface data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention.

[0116]

Table 2

[0117]

[0118]

[0119] 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).

[0120] z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r6 +A8r 8 +A10r 10 +A12r 12 +A14r

[0121] 14 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 ; (1)

[0122] 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).

[0123] Figure 2 , Figure 3 Schematic diagrams showing axial aberration and magnification chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the imaging optical lens 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 555 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.

[0124] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 0.713 mm, the image height IH of the 1.0 field of view is 2.285 mm, the field angle FOV of the 1.0 field of view is 115.43°, the image height IHm of the MIC field of view is 2.397 mm, and the field angle FOVm of the MIC field of view is 120.60°. 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.

[0125] (Second Embodiment)

[0126] The meanings of the symbols in the second embodiment are the same as those in the first embodiment.

[0127] The difference from the first embodiment is that the object-side surface of the second lens L2 is convex at the paraxial position.

[0128] Figure 5 FIG. 2 shows an imaging optical lens 20 according to a second embodiment of the present invention.

[0129] Tables 3 and 4 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.

[0130]

Table 3

[0131]

[0132] Table 4 shows aspherical surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[0133]

Table 4

[0134]

[0135]

[0136] Figure 6 , Figure 7 Schematic diagrams showing axial aberration and magnification chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the imaging optical lens 20 of the second embodiment are shown respectively. Figure 8 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 20 of the second embodiment. Figure 8 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0137] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 0.613 mm, the image height IH of the 1.0 field of view is 2.276 mm, the field angle FOV of the 1.0 field of view is 122.97°, the image height IHm of the MIC field of view is 2.390 mm, and the field angle FOVm of the MIC field of view is 127.67°. 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.

[0138] (Third Embodiment)

[0139] The meanings of the symbols in the third embodiment are the same as those in the first embodiment.

[0140] The difference from the first embodiment is that the object-side surface of the second lens L2 is convex at the paraxial position.

[0141] Fig. 9 FIG. 1 shows an imaging optical lens 30 according to a third embodiment of the present invention.

[0142] Tables 5 and 6 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.

[0143]

Table 5

[0144]

[0145] Table 6 shows aspherical surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.

[0146]

Table 6

[0147]

[0148]

[0149] Fig.10 , Fig.11 Schematic diagrams showing axial aberration and magnification chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the imaging optical lens 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 555 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.

[0150] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 0.680 mm, the image height IH of the 1.0 field of view is 2.233 mm, the field angle FOV of the 1.0 field of view is 117.81°, the image height IHm of the MIC field of view is 2.370 mm, and the field angle FOVm of the MIC field of view is 122.90°. 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.

[0151] (Fourth Embodiment)

[0152] The meanings of symbols in the fourth embodiment are the same as those in the first embodiment.

[0153] The difference from the first embodiment is that the object-side surface of the second lens L2 is convex at the paraxial position.

[0154] Fig.13 FIG. 4 shows an imaging optical lens 40 according to a fourth embodiment of the present invention.

[0155] Tables 7 and 8 show design data of the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0156]

Table 7

[0157]

[0158] Table 8 shows aspherical surface data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0159]

Table 8

[0160]

[0161] Fig.14 , Fig.15 Schematic diagrams showing axial aberration and magnification chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the imaging optical lens 40 of the fourth embodiment are shown respectively. Fig.16 FIG. 4 is a schematic diagram showing the field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 40 of the fourth embodiment. Fig.16 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0162] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 0.668 mm, the image height IH of the 1.0 field of view is 2.246 mm, the field angle FOV of the 1.0 field of view is 118.76°, the image height IHm of the MIC field of view is 2.370 mm, and the field angle FOVm of the MIC field of view is 123.77°. 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.

[0163] Table 21 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.

[0164] (Comparative Implementation)

[0165] The meanings of the symbols in the comparative embodiment are the same as those in the first embodiment.

[0166] Fig.17 Shown is a camera optical lens 50 according to a comparative embodiment.

[0167] Tables 9 and 10 show design data of the imaging optical lens 50 according to the comparative embodiment.

[0168]

Table 9

[0169]

[0170]

[0171] Table 10 shows aspherical surface data of each lens in the imaging optical lens 50 of the comparative embodiment.

[0172]

Table 10

[0173]

[0174] Fig.18 , Fig.19 Schematic diagrams of axial aberration and magnification chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and 470 nm after passing through the camera optical lens 50 of the comparative embodiment are respectively shown. Fig. 20 FIG. 4 is a schematic diagram showing the field curvature and distortion of light having a wavelength of 555 nm after passing through the camera optical lens 50 of the comparative embodiment. Fig. 20 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0175] Table 11 below lists the values ​​corresponding to the various conditional expressions in the comparative embodiment according to the above conditional expressions. Obviously, the imaging optical lens 50 of the comparative embodiment does not satisfy the above conditional expression -1.00≤f3 / (R5+R6)≤-0.30.

[0176] In a comparative embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 0.677 mm, the image height IH of the 1.0 field of view is 2.160 mm, the field angle FOV of the 1.0 field of view is 118.04°, the image height IHm of the MIC field of view is 2.360 mm, and the field angle FOVm of the MIC field of view is 123.10°. The camera optical lens 50 does not meet the design requirements of large aperture, wide angle and ultra-thinness.

[0177]

Table 11

[0178]

[0179] 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 comprises five lenses in total, and the five lenses are, from the object side to the image side, in order: a first lens with negative refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power; The focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the radius of curvature of the object side surface of the first lens is R1, the radius of curvature of the image side surface of the first lens is R2, the radius of curvature of the object side surface of the third lens is R5, and the radius of curvature of the image side surface of the third lens is R6, and the following relationship is satisfied: -1.00≤f3 / (R5+R6)≤-0.30; -0.65≤(R1+R2) / (R1-R2)≤-0.25; -8.00≤f1 / f2≤-4.

00.

2. The imaging optical lens according to claim 1, characterized in that: The focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the camera optical lens is f, and the following relationship is satisfied: 1.40≤(f4-f5) / f≤2.

40.

3. The imaging optical lens according to claim 1, characterized in that: The air interval between the first lens and the second lens is T12, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.09≤T12 / TTL≤0.

14.

4. The imaging optical lens according to claim 1, wherein: The combined focal length of the second lens and the third lens is f23, the center thickness of the second lens on the optical axis is T2, the center thickness of the third lens on the optical axis is T3, the air interval between the second lens and the third lens is T23, and the following relationship is satisfied: 4.00≤f23 / (T2+T23+T3)≤6.

00.

5. The imaging optical lens according to claim 1, wherein: The object side surface of the first lens is concave at the paraxial position, and the image side surface of the first lens is concave at the paraxial position; The focal length of the camera optical lens is f, the axial thickness of the first lens is d1, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -9.59≤f1 / f≤-5.92; 0.06≤d1 / TTL≤0.

07.

6. The imaging optical lens according to claim 1, characterized in that: The image side surface of the second lens is convex at the paraxial position; The focal length of the camera optical lens is f, the radius of curvature of the object side of the second lens is R3, the radius of curvature of the image side of the second lens is R4, the axial thickness of the second lens is d3, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 1.20≤f2 / f≤1.48; 0.89≤(R3+R4) / (R3-R4)≤1.01; 0.12≤d3 / TTL≤0.

16.

7. The imaging 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 focal length of the camera optical lens is f, the axial thickness of the third lens is d5, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -4.09≤f3 / f≤-2.86; 1.50≤(R5+R6) / (R5-R6)≤2.95; 0.05≤d5 / TTL≤0.

06.

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 focal length of the fourth lens is f4, the focal length of the camera optical lens is f, the radius of curvature of the object side of the fourth lens is R7, the radius of curvature of the image side of the fourth lens is R8, the axial thickness of the fourth lens is d7, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: 0.68≤f4 / f≤0.86; 1.48≤(R7+R8) / (R7-R8)≤1.85; 0.17≤d7 / TTL≤0.

21.

9. The imaging optical lens according to claim 1, characterized in that: The object side surface of the fifth lens is convex at the paraxial position, and the image side surface of the fifth lens is concave at the paraxial position; The focal length of the fifth lens is f5, the focal length of the camera optical lens is f, the radius of curvature of the object side of the fifth lens is R9, the radius of curvature of the image side of the fifth lens is R10, the axial thickness of the fifth lens is d9, the total optical length of the camera optical lens is TTL, and the following relationship is satisfied: -1.53≤f5 / f≤-0.72; 1.75≤(R9+R10) / (R9-R10)≤3.28; 0.07≤d9 / TTL≤0.

12.

10. The imaging optical lens according to claim 1, characterized in that: FN0 represents the aperture number of the camera optical lens and satisfies the following relationship: FN0≤2.25 。

Images