Camera lens

Abstract

The application relates to the field of optical lenses, and discloses a camera optical lens, which comprises five lenses in total, and the five lenses are sequentially arranged from the object side to the image side as follows: a first lens with positive refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power; wherein the camera optical lens satisfies the following relationship: 3.00<=f2 / f<=12.00; 1.10<=(R9+R10) / (R9-R10)<=1.90; 1.00<=d1 / d2<=4.00; and 2.00<=R6 / R5<=15.00. The camera optical lens provided by the application can meet the design requirements of large aperture, ultra-thin, and wide-angle.

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 shrinking pixel size of photosensitive devices and the trend towards lightweight, portable electronic products with high functionality, miniaturized camera optical lenses with excellent imaging quality have become the mainstream in the market. To achieve optimal imaging quality, multi-element lens structures are often used. Furthermore, with technological advancements and increasing user demands, as the pixel size of photosensitive devices continues to shrink and the system's requirements for imaging quality continue to increase, five-element lens structures are gradually emerging in lens designs. There is an urgent need for wide-angle camera lenses with excellent optical characteristics, a compact size, and sufficient aberration compensation. 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 that has good optical performance while meeting the design requirements of large aperture, ultra-thinness and wide angle.

[0004] To achieve the above-mentioned object, the technical solution of the present invention provides a camera optical lens, which comprises a total of five lenses, wherein the five lenses are, in order from the object side to the image side: a first lens with positive refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power; wherein the focal length of the camera optical lens is f, the focal length of the second lens is f2, the central curvature radius of the object side surface of the fifth lens is R9, and the image side surface of the fifth lens is R1. The central curvature radius is R10, the axial thickness of the first lens is d1, the axial distance from the image side surface of the first lens to the object side surface of the second lens is d2, 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, and the following relationship is satisfied: 3.00≤f2 / f≤12.00; 1.10≤(R9+R10) / (R9-R10)≤1.90; 1.00≤d1 / d2≤4.00; 2.00≤R6 / R5≤15.00.

[0005] Preferably, the on-axis distance from the image side surface of the third lens to the object side surface of the fourth lens is d6, and the on-axis distance from the image side surface of the fourth lens to the object side surface of the fifth lens is d8, and the following relationship is satisfied: 1.00≤d6 / d8≤3.00.

[0006] Preferably, the focal length of the third lens is f3, and the following relationship is satisfied: -4.00≤f3 / f≤-1.20.

[0007] Preferably, the object side surface of the first lens is convex at the paraxial region, the image side surface of the first lens is concave at the paraxial region; 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, the total track length of the camera optical lens is TTL, and the following relationships are satisfied: 0.68≤f1 / f≤2.31; -3.87≤(R1+R2) / (R1-R2)≤-1.13; 0.04≤d1 / TTL≤0.25.

[0008] Preferably, the object side surface of the second lens is convex at the paraxial region; 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, the on-axis thickness of the second lens is d3, the total track length of the camera optical lens is TTL, and the following relationships are satisfied: -2.65≤(R3+R4) / (R3-R4)≤-0.38; 0.04≤d3 / TTL≤0.15.

[0009] Preferably, the object side surface of the third lens is concave at the paraxial region, the image side surface of the third lens is convex at the paraxial region; the on-axis thickness of the third lens is d5, the total track length of the camera optical lens is TTL, and the following relationships are satisfied: -5.98≤(R5+R6) / (R5-R6)≤-0.76; 0.03≤d5 / TTL≤0.12.

[0010] Preferably, the image side surface of the fourth lens is convex at the paraxial region; the focal length of the fourth lens is f4, the central radius of curvature of the object side surface of the fourth lens is R7, the central radius of curvature of the image side surface of the fourth lens is R8, the on-axis thickness of the fourth lens is d7, the total track length of the camera optical lens is TTL, and the following relationships are satisfied: 0.28≤f4 / f≤1.32; 0.43≤(R7+R8) / (R7-R8)≤2.45; 0.05≤d7 / TTL≤0.24.

[0011] Preferably, the object side surface of the fifth lens is convex at the paraxial region, the image side surface of the fifth lens is concave at the paraxial region; the focal length of the fifth lens is f5, the on-axis thickness of the fifth lens is d9, the total track length of the camera optical lens is TTL, and the following relationships are satisfied: -2.42≤f5 / f≤-0.39; 0.07≤d9 / TTL≤0.29.

[0012] Preferably, the total optical length of the camera optical lens is TTL, the maximum image height of the camera optical lens is IH, and the following relationship is satisfied: TTL / IH≤1.40.

[0013] Preferably, the focal length of the camera optical lens is f, the combined focal length of the first lens and the second lens is f12, and the following relationship is satisfied: 0.50≤f12 / f≤1.94.

[0014] The beneficial effects of the present invention are that 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

[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. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0016] Figure 1 1 is a schematic structural diagram of a camera 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 2 is a schematic structural diagram of a second embodiment of an imaging optical lens according to 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] Figure 9 is a structural diagram of a camera optical lens of a third embodiment of the present application;

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

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

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

[0028] Figure 13 is a structural diagram of a camera optical lens of a fourth embodiment of the present application;

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

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

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

[0032] Figure 17 is a structural diagram of a camera optical lens of a comparative embodiment;

[0033] Figure 18 is an axial aberration diagram of the camera optical lens shown in Figure 17

[0034] Figure 19 is a lateral chromatic aberration diagram of the camera optical lens shown in Figure 17

[0035] Figure 20 is a field curvature and distortion diagram of the camera optical lens shown in Figure 17 DETAILED DESCRIPTION

[0036] In order to make the objects, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in detail below with reference to the drawings. However, those skilled in the art can understand that, in the embodiments of the present application, many technical details are presented in order to make the readers better understand the present application. However, the technical solutions claimed by the present application can be realized even without these technical details and based on various changes and modifications of the following embodiments.​​​​​​​​​

[0037] With reference to the drawings, the technical scheme of the present application provides a camera optical lens 10, 20, 30, 40. Figure 1 、 5 , 9, 13 respectively are the camera optical lens 10, 20, 30, 40 of the present application, and the camera optical lens 10, 20, 30, 40 comprises five lenses. Specifically, the camera optical lens, from the object side to the image side, is in order: aperture S1, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5. An optical filter (filter) GF and other optical elements can be arranged between the fifth lens L5 and the image plane Si.

[0038] The first lens L1 is made of 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 can also be made of other materials.

[0039] The focal length of the camera optical lens is defined as f, and the focal length of the second lens L2 is defined as f2, which satisfies the following relationship: 3.00≤f2 / f≤12.00, which defines the ratio of the focal length of the second lens L2 to the focal length f of the camera optical lens. Within the range of the relationship, the focal length of the camera optical lens is reasonably distributed, so that the camera optical lens has better imaging quality and lower sensitivity.

[0040] 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, which satisfies the following relationship: 1.10≤(R9+R10) / (R9-R10)≤1.90, which defines the shape of the fifth lens L5, which is beneficial to correcting the astigmatism and distortion of the camera optical lens, so that the distortion |Distortion|≤2.7%, and reduces the possibility of dark corner.

[0041] The on-axis thickness of the first lens L1 is defined as d1, and the on-axis 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: 1.00≤d1 / d2≤4.00, which defines the ratio of the on-axis thickness d1 of the first lens L1 to the on-axis distance d2 from the image side of the first lens L1 to the object side of the second lens L2. Within the range of the relationship, it is helpful to compress the total optical length of the camera optical lens.

[0042] The center curvature radius of the object side surface of the third lens L3 is defined as R5, and the center curvature radius of the image side surface of the third lens L3 is defined as R6, and the following relationship is satisfied: 2.00≤R6 / R5≤15.00. This relationship defines the shape of the third lens L3, and within the conditional range, the degree of light deviation through the lens can be mitigated, and chromatic aberration can be effectively corrected, so that the chromatic aberration |LC|≤5.0 μm.

[0043] Under the conditions of satisfying the above several conditional expressions, the imaging optical lens 10, 20, 30, 40 has good optical performance while meeting the design requirements of large aperture, wide angle, and ultra-thin. According to the characteristics of the imaging optical lens 10, 20, 30, 40, the imaging optical lens 10, 20, 30, 40 is particularly suitable for mobile phone camera lens assemblies and WEB cameras composed of high-pixel CCD, CMOS, and other imaging elements.

[0044] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.

[0045] The on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4 is defined as d6, and the on-axis distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5 is defined as d8, and the following relationship is satisfied: 1.00≤d6 / d8≤3.00. This relationship defines the ratio of the air gap between the third lens L3 and the fourth lens L4 and the air gap between the fourth lens L4 and the fifth lens L5. Within the relationship range, it is helpful to compress the total optical length of the imaging optical lens.

[0046] The focal length of the third lens L3 is defined as f3, and the following relationship is satisfied: -4.00≤f3 / f≤-1.20. This relationship defines the ratio of the focal length of the third lens L3 to the focal length f of the imaging optical lens. Within the relationship range, by reasonably allocating the focal length of the imaging optical lens, the imaging optical lens has better imaging quality and lower sensitivity.

[0047] The object side surface of the first lens L1 is convex at the near-axis, and the image side surface is concave at the near-axis, and the first lens L1 has positive refractive power. The object side surface and the image side surface of the first lens L1 can also be provided with other concave and convex distribution conditions.

[0048] The focal length of the first lens L1 is defined as f1, and the following relationship is satisfied: 0.68≤f1 / f≤2.31, which defines the ratio of the positive refractive power of the first lens L1 to the overall focal length. Within the specified range, the first lens L1 has appropriate positive refractive power, which is beneficial to reducing system aberration, and is also beneficial to the development of the lens towards ultra-thin and wide angle.

[0049] 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, and the following relationship is satisfied: -3.87≤(R1+R2) / (R1-R2)≤-1.13. By reasonably controlling the shape of the first lens L1, the first lens L1 can effectively correct the system spherical aberration. Preferably, -2.42≤(R1+R2) / (R1-R2)≤-1.41 is satisfied.

[0050] The on-axis thickness of the first lens L1 is d1, and the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 0.04≤d1 / TTL≤0.25. Within the range of the relationship, it is beneficial to realize the ultra-thinning. Preferably, 0.07≤d1 / TTL≤0.20 is satisfied.

[0051] The object side surface of the second lens L2 is convex at the near axis, and the image side surface of the second lens L2 is concave or convex at the near axis. The second lens L2 has a positive refractive power. The object side surface of the second lens L2 can also be provided with other concave and convex distribution conditions.

[0052] 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, and the following relationship is satisfied: -2.65≤(R3+R4) / (R3-R4)≤-0.38. This relationship specifies the shape of the second lens L2. When within the range, it is beneficial to correct the on-axis chromatic aberration problem as the lens develops towards ultra-thinning and wide-angle. Preferably, -1.65≤(R3+R4) / (R3-R4)≤-0.47 is satisfied.

[0053] The on-axis thickness of the second lens L2 is d3, and the following relationship is satisfied: 0.04≤d3 / TTL≤0.15. Within the range of the relationship, it is beneficial to realize the ultra-thinning. Preferably, 0.06≤d3 / TTL≤0.12 is satisfied.

[0054] The object side surface of the third lens L3 is concave at the near axis, and the image side surface of the third lens L3 is convex at the near axis. The third lens L3 has a negative refractive power. The object side surface and the image side surface of the third lens L3 can also be provided with other concave and convex distribution conditions.

[0055] The imaging optical lens also satisfies the following relationship: -5.98≤(R5+R6) / (R5-R6)≤-0.76, which specifies the shape of the third lens L3, is beneficial to the molding of the third lens L3. Within the range specified by the relationship, the degree of deflection of light passing through the lens can be eased, and aberration can be effectively reduced. Preferably, -3.74≤(R5+R6) / (R5-R6)≤-0.95 is satisfied.

[0056] The on-axis thickness of the third lens L3 is d5, which satisfies the following relationship: 0.03≤d5 / TTL≤0.12. Within the range of the relationship, the ultra-thinning is facilitated. Preferably, 0.05≤d5 / TTL≤0.10 is satisfied.

[0057] The object side surface of the fourth lens L4 is concave or convex at the paraxial region, the image side surface is convex at the paraxial region, and the fourth lens L4 has positive refractive power. The image side surface of the fourth lens L4 can also be provided with other concave or convex distribution.

[0058] The focal length of the fourth lens L4 is f4, which satisfies the following relationship: 0.28≤f4 / f≤1.32. Through reasonable distribution of optical power, the system has better imaging quality and lower sensitivity. Preferably, 0.44≤f4 / f≤1.06 is satisfied.

[0059] 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: 0.43≤(R7+R8) / (R7-R8)≤2.45. The shape of the fourth lens L4 is specified. When within the range, with the development of ultra-thin wide-angle, it is beneficial to correct the aberration of the off-axis angle and other problems. Preferably, 0.68≤(R7+R8) / (R7-R8)≤1.96 is satisfied.

[0060] The on-axis thickness of the fourth lens L4 is d7, which satisfies the following relationship: 0.05≤d7 / TTL≤0.24. Within the range of the relationship, the ultra-thinning is facilitated. Preferably, 0.09≤d7 / TTL≤0.19 is satisfied.

[0061] The object side surface of the fifth lens L5 is convex at the paraxial region, and the image side surface is concave at the paraxial region. The fifth lens L5 has negative refractive power. The object side surface and the image side surface of the fifth lens L5 can also be provided with other concave or convex distribution.

[0062] The focal length of the fifth lens L5 is f5, which satisfies the following relationship: -2.42≤f5 / f≤-0.39. The limitation of the fifth lens L5 can effectively make the light angle of the imaging optical lens gentle, and reduce the tolerance sensitivity. Preferably, -1.51≤f5 / f≤-0.49 is satisfied.

[0063] The on-axis thickness of the fifth lens L5 is d9, which satisfies the following relationship: 0.07≤d9 / TTL≤0.29. Within the range of the relationship, the ultra-thinning is facilitated. Preferably, 0.10≤d9 / TTL≤0.23 is satisfied.

[0064] The maximum image height of the imaging optical lens is IH, which satisfies the following relationship: TTL / IH≤1.40.

[0065] The combined focal length of the first lens L1 and the second lens L2 is f12, and the following relationship is satisfied: 0.50≤f12 / f≤1.94. Within the range of the relationship, the aberration and distortion of the camera optical lens can be eliminated, the back focal length of the camera optical lens can be suppressed, and the image lens system group can be maintained small in size. Preferably, 0.80≤f12 / f≤1.56 is satisfied.

[0066] The field of view FOV of the camera optical lens is greater than or equal to 90.00°, thereby realizing wide-angle.

[0067] The F-number FNO of the camera optical lens is less than or equal to 2.11, thereby realizing a large aperture and good imaging performance of the camera optical lens.

[0068] The camera optical lens of the present application will be described below with examples. The symbols described in each example are as follows. The units of focal length, on-axis distance, center curvature radius, on-axis thickness, inflection point position, and stationary point position are mm.

[0069] TTL: total optical length (on-axis distance from the object side of the first lens L1 to the image surface Si), unit: mm;

[0070] F-number FNO: refers to the ratio of the effective focal length of the camera optical lens to the entrance pupil diameter.

[0071] Next, the technical solutions of the present application will be described in detail in four embodiments, and a comparative embodiment is provided as a reference. When the above conditions are exceeded, the technical effects of the present application cannot be achieved.

[0072] (First embodiment)

[0073] Table 1 and Table 2 show the design data of the camera optical lens 10 of the first embodiment of the present application.

[0074]

Table 1

[0075]

[0076] The meanings of the symbols are as follows.

[0077] S1: aperture;

[0078] R: center curvature radius of an optical surface;

[0079] R1: center curvature radius of the object side of the first lens L1;

[0080] R2: center curvature radius of the image side of the first lens L1;

[0081] R3: center curvature radius of the object side of the second lens L2;

[0082] R4: central radius of curvature of the image side surface of the second lens L2;

[0083] R5: central radius of curvature of the object side surface of the third lens L3;

[0084] R6: central radius of curvature of the image side surface of the third lens L3;

[0085] R7: central radius of curvature of the object side surface of the fourth lens L4;

[0086] R8: central radius of curvature of the image side surface of the fourth lens L4;

[0087] R9: central radius of curvature of the object side surface of the fifth lens L5;

[0088] R10: central radius of curvature of the image side surface of the fifth lens L5;

[0089] R11: central radius of curvature of the object side surface of the optical filter GF;

[0090] R12: central radius of curvature of the image side surface of the optical filter GF;

[0091] d: on-axis thickness of a lens, on-axis distance between lenses;

[0092] d0: on-axis distance from the stop S1 to the object side surface of the first lens L1;

[0093] d1: on-axis thickness of the first lens L1;

[0094] d2: on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

[0095] d3: on-axis thickness of the second lens L2;

[0096] d4: on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

[0097] d5: on-axis thickness of the third lens L3;

[0098] d6: on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

[0099] d7: on-axis thickness of the fourth lens L4;

[0100] d8: on-axis distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

[0101] d9: on-axis thickness of the fifth lens L5;

[0102] d10: on-axis distance from the image side surface of the fifth lens L5 to the object side surface of the optical filter GF;

[0103] d11: on-axis thickness of optical filter GF;

[0104] d12: on-axis distance from image side surface to image surface Si of optical filter GF;

[0105] nd: refractive index at d-line (d-line is green light having a wavelength of 555 nm);

[0106] nd1: refractive index at d-line of first lens L1;

[0107] nd2: refractive index at d-line of second lens L2;

[0108] nd3: refractive index at d-line of third lens L3;

[0109] nd4: refractive index at d-line of fourth lens L4;

[0110] nd5: refractive index at d-line of fifth lens L5;

[0111] ndg: refractive index at d-line of optical filter GF;

[0112] vd: Abbe number;

[0113] v1: Abbe number of first lens L1;

[0114] v2: Abbe number of second lens L2;

[0115] v3: Abbe number of third lens L3;

[0116] v4: Abbe number of fourth lens L4;

[0117] v5: Abbe number of fifth lens L5;

[0118] vg: Abbe number of optical filter GF.

[0119] Table 2 shows aspherical surface data of each lens in the photographing optical lens 10 of the first embodiment of the present application.

[0120]

Table 2

[0121]

[0122]

[0123] For convenience, the aspherical surface of each lens surface uses the aspherical surface shown in the following formula (1). However, the present application is not limited to the aspherical polynomial form represented by the formula (1).

[0124] z = (cr 2 ) / {1 + [1 - (k + 1)(c2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r

[0125] 14 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0126] wherein, k is a conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 are aspherical coefficients, c is the curvature at the center of the optical surface, r is the perpendicular distance of a point on the aspherical curve from the optical axis, and z is the aspherical depth (the perpendicular distance between a point on the aspherical curve at a distance r from the optical axis and a tangent plane tangent to the vertex of the aspherical surface on the optical axis).

[0127] Figure 2 、 Figure 3 Figures 6A, 6B, 6C, 6D, 6E and 6F respectively show the axial aberration and the lateral chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm after passing through the camera optical lens 10 of the first embodiment. Figure 4 Figures 7A and 7B respectively show the field curvature and the distortion of light with 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 sagittal field curvature, and T is the tangential field curvature.

[0128] In the present embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 1.449 mm, the full field image height IH is 3.269 mm, and the field of view FOV in the diagonal direction is 92.63°. The camera optical lens 10 meets the design requirements of large aperture, wide angle and ultra-thin, and the on-axis and off-axis chromatic aberrations are fully corrected, and has excellent optical characteristics.

[0129] (Second Embodiment)

[0130] The symbol meanings of the second embodiment are the same as those of the first embodiment.

[0131] Figure 5The camera optical lens 20 of the second embodiment of the present application is shown.

[0132] Tables 3 and 4 show the design data of the camera optical lens 20 of the second embodiment of the present application.

[0133]

Table 3

[0134]

[0135] Table 4 shows the aspheric surface data of each lens in the camera optical lens 20 of the second embodiment of the present application.

[0136]

Table 4

[0137]

[0138] Figure 6 、 Figure 7 The axial aberration and the lateral chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm after passing through the camera optical lens 20 of the second embodiment are shown respectively. Figure 8 The field curvature and the distortion of light with a wavelength of 555 nm after passing through the camera optical lens 20 of the second embodiment are shown. Figure 8 The field curvature S is the sagittal field curvature, and T is the tangential field curvature.

[0139] In the present embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 1.396 mm, the full field image height IH is 3.269 mm, and the field of view FOV in the diagonal direction is 93.00°. The camera optical lens 20 satisfies the design requirements of large aperture, wide angle and ultra-thin, and the on-axis and off-axis chromatic aberrations are fully corrected, and has excellent optical characteristics.

[0140] (Third Embodiment)

[0141] The symbol meanings of the third embodiment are the same as those of the first embodiment.

[0142] Figure 9 The camera optical lens 30 of the third embodiment of the present application is shown. The object side surface of the fourth lens L4 is convex at the near axis.

[0143] Tables 5 and 6 show the design data of the camera optical lens 30 of the third embodiment of the present application.

[0144]

Table 5

[0145]

[0146] Table 6 shows the aspheric surface data of each lens in the camera optical lens 30 of the third embodiment of the present application.

[0147] Table 6

[0148]

[0149] Figure 10 、 Figure 11 Figures respectively show the axial aberration and the lateral chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm after passing through the camera optical lens 30 of the third embodiment. Figure 12 Figures respectively show the field curvature and the distortion of light with a wavelength of 555 nm after passing through the camera optical lens 30 of the third embodiment. Figure 12 The field curvature S is the sagittal field curvature, and T is the tangential field curvature.

[0150] In the present embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 1.468 mm, the full field image height IH is 3.269 mm, and the field of view FOV in the diagonal direction is 90.01°. The camera optical lens 30 meets the design requirements of large aperture, wide angle and ultra-thin, and the on-axis and off-axis chromatic aberrations are fully corrected, and has excellent optical characteristics.

[0151] (Fourth Embodiment)

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

[0153] Figure 13 The camera optical lens 40 of the fourth embodiment of the present application is shown. The image side surface of the second lens L2 is concave at the near axis.

[0154] Tables 7 and 8 show the design data of the camera optical lens 40 of the fourth embodiment of the present application.

[0155] Table 7

[0156]

[0157] Table 8 shows the aspheric surface data of each lens in the camera optical lens 40 of the fourth embodiment of the present application.

[0158] Table 8

[0159]

[0160]

[0161] Figure 14 、 Figure 15Figures showing the axial aberration and the lateral chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm after passing through the camera optical lens 40 of the fourth embodiment are shown. Figure 16 Figures showing the field curvature and the distortion of light with a wavelength of 555 nm after passing through the camera optical lens 40 of the third embodiment are shown. Figure 16 The field curvature S is the sagittal field curvature, and T is the tangential field curvature.

[0162] In the present embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 1.207 mm, the full field image height IH is 3.269 mm, and the diagonal direction field of view FOV is 90.88°. The camera optical lens 40 satisfies the design requirements of large aperture, wide angle and ultra-thin, and the on-axis and off-axis chromatic aberrations are fully corrected, and has excellent optical characteristics.

[0163] Table 11, which appears later, shows the values corresponding to the parameters specified in the various numerical values and conditions in the first, second, third and fourth embodiments.

[0164] (Comparative Embodiment)

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

[0166] Figure 17 The camera optical lens 50 of the comparative embodiment of the present application is shown.

[0167] Tables 9 and 10 show the design data of the camera optical lens 50 of the comparative embodiment of the present application.

[0168]

Table 9

[0169]

[0170] Table 10 shows the aspheric surface data of each lens in the camera optical lens 50 of the comparative embodiment of the present application.

[0171]

Table 10

[0172]

[0173]

[0174] Figure 18 、 Figure 19 Figures showing the axial aberration and the lateral chromatic aberration of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm after passing through the camera optical lens 50 of the comparative embodiment are shown. Figure 20Fig. 6 shows a field curvature and distortion diagram of light with a wavelength of 546 nm after passing through the third embodiment of the camera optical lens 30. Figure 20 S is the sagittal field curvature and T is the tangential field curvature.

[0175] Table 11 lists the numerical values corresponding to each condition formula in the comparative embodiment according to the above condition formulas. Obviously, the camera optical lens 50 in the comparative embodiment does not satisfy the condition formula 3.00≤f2 / f≤12.00, and the imaging effect is poor.

[0176] In the comparative embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 1.444 mm, the full field of view image height IH is 3.269 mm, and the field of view angle FOV in the diagonal direction is 90.33°. The camera optical lens 50 does not satisfy the design requirements of large aperture, wide angle, and ultra-thin.

[0177]

Table 11

[0178]

[0179] It is understood by those skilled in the art that the above embodiments are specific embodiments for implementing the present application, and in actual applications, various changes can be made in form and details without departing from the spirit and scope of the present application.​

Claims

1. A camera optical lens characterized in that, The camera optical lens comprises five lenses in sequence from the object side to the image side: a first lens with positive refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power; the object side surface of the first lens is convex at the near axis, and the image side surface of the first lens is concave at the near axis; Wherein, the focal length of the camera optical lens is f, the focal length of the second lens is f2, 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 on-axis thickness of the first lens is d1, the on-axis distance from the image side surface of the first lens to the object side surface of the second lens is d2, 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 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 total optical length of the camera optical lens is TTL, and the following relationships are satisfied: 3.00≤f2 / f≤12.00; 1.10≤(R9+R10) / (R9-R10)≤1.90; 1.00≤d1 / d2≤4.00; 2.00≤R6 / R5≤15.00; 0.68≤f1 / f≤2.31; -3.87≤(R1+R2) / (R1-R2)≤-1.13; 0.04≤d1 / TTL≤0.

25.

2. The camera optical lens according to claim 1, characterized in that, The on-axis distance from the image side surface of the third lens to the object side surface of the fourth lens is d6, the on-axis distance from the image side surface of the fourth lens to the object side surface of the fifth lens is d8, and the following relationship is satisfied: 1.00≤d6 / d8≤3.

00.

3. The camera optical lens according to claim 1, wherein, The focal length of the third lens is f3, and the following relationship is satisfied: -4.00≤f3 / f≤-1.

20.

4. The camera optical lens according to claim 1, characterized in that, The object side surface of the second lens is convex at the near axis; 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 on-axis thickness of the second lens is d3, and the following relationships are satisfied: -2.65≤(R3+R4) / (R3-R4)≤-0.38; 0.04≤d3 / TTL≤0.

15.

5. The camera optical lens according to claim 1, wherein, The object side surface of the third lens is concave at the near axis, and the image side surface of the third lens is convex at the near axis; The on-axis thickness of the third lens is d5, and the following relationships are satisfied: -5.98≤(R5+R6) / (R5-R6)≤-0.76; 0.03≤d5 / TTL≤0.

12.

6. The camera optical lens according to claim 1, characterized in that, The image side surface of the fourth lens is convex at the near axis; 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, the on-axis thickness of the fourth lens is d7, and the following relationships are satisfied: 0.28≤f4 / f≤1.32; 0.43≤(R7+R8) / (R7-R8)≤2.45; 0.05≤d7 / TTL≤0.

24.

7. The camera optical lens according to claim 1, wherein, the object side surface of the fifth lens is convex at the paraxial region, and the image side surface of the fifth lens is concave at the paraxial region; the focal length of the fifth lens is f5, the on-axis thickness of the fifth lens is d9, and the following relation is met: -2.42≤f5 / f≤-0.39; 0.07≤d9 / TTL≤0.

29.

8. The camera optical lens according to claim 1, characterized in that, the maximum image height of the photographing optical lens is IH, and the following relation is met: TTL / IH≤1.

40.

9. The camera optical lens according to claim 1, characterized in that, the combined focal length of the first lens and the second lens is f12, and the following relation is met: 0.50≤f12 / f≤1.94.

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