Camera lens

Abstract

The application relates to the field of optical lenses and discloses a camera optical lens which is composed of a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power and a triangular prism with negative refractive power arranged in sequence from a subject side to an image side; wherein the on-axis distance from the subject side of the first lens to the image side of the third lens is D, the total optical length of the camera optical lens is TTL, the focal length of the camera optical lens is f, the refractive index of the glass lens of the camera optical lens is ndi, the SAG32 of the image side of the third lens at the maximum optical effective diameter is 0.32, half of the maximum optical effective diameter of the image side of the third lens is SD32, the focal length of the third lens is f3, the on-axis thickness of the third lens is d5, the curvature radius of the subject side of the third lens is R5, the curvature radius of the image side of the third lens is R6, and the following relationships are met: 0.11 <= D / TTL <= 0.20; 0.10 <= D / f <= 0.22; 1.49 <= ndi <= 1.85; 0.32 <= |SAG32| / SD32 <= 0.52; and -20.03 <= f3*d5 / (R5-R6) <= -7.99.

Description

TECHNICAL FIELD

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

[0002] In recent years, with the rise of various smart devices, the demand for small-sized camera optical lenses is increasing, and due to the reduction of the pixel size of photosensitive devices, in addition to the current trend of electronic products being light and thin, the small-sized camera optical lens with good imaging quality has become the mainstream in the market. Long-focus camera lenses can meet the needs of consumers to shoot specific targets. The optical total length of traditional long-focus camera lenses is too large, which does not meet the design requirements of smart phones being light and thin. Periscopic long-focus camera lens design can significantly shorten the optical total length of the camera optical lens while meeting the long-focus design requirements. However, the optical performance of the existing periscopic long-focus camera optical lens still cannot meet the requirements. SUMMARY

[0003] In view of the above problems, the purpose of the present application is to provide a camera optical lens which can obtain high imaging performance while meeting the design requirements of large aperture periscopic lens.

[0004] To solve the above technical problems, the embodiment of the present application provides a camera optical lens, which is composed of a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, and a triangular prism arranged in order from the object side to the image side. At least one of the first lens, the second lens and the third lens is a glass lens. The on-axis distance from the object side of the first lens to the image side of the third lens is D, the optical total length of the camera optical lens is TTL, the focal length of the camera optical lens is f, the refractive index of the glass lens of the camera optical lens is ndi, the sagittal height of the image side of the third lens at the maximum optical effective diameter is SAG32, half of the maximum optical effective diameter of the image side of the third lens is SD32, the focal length of the third lens is f3, the on-axis thickness of the third lens is d5, the curvature radius of the object side of the third lens is R5, and the curvature radius of the image side of the third lens is R6. The following relationships are satisfied: 0.11≤D / TTL≤0.20; 0.10≤D / f≤0.22; 1.49≤ndi≤1.85; 0.32≤|SAG32| / SD32≤0.52; -20.03≤f3*d5 / (R5-R6)≤-7.99.

[0005] Preferably, a combined focal length of the first lens and the second lens is f12, and the following relation is satisfied: 0.57 ≤ f12 / f ≤ 0.71.

[0006] Preferably, an on-axis thickness of the first lens is d1, an edge thickness of the first lens is ET1, and the following relation is satisfied: 2.48 ≤ d1 / ET1 ≤ 4.04.

[0007] Preferably, a material of the first lens is glass, a material of the second lens is glass, a material of the third lens is glass, and the following relations are satisfied: 0.35 ≤ f1 / f ≤ 0.60; -1.65 ≤ (R1+R2) / (R1-R2) ≤ -0.58; 0.055 ≤ d1 / TTL ≤ 0.092.

[0008] Preferably, a focal length of the second lens is f2, a radius of curvature of a lens object side surface of the second lens is R3, a radius of curvature of a lens image side surface of the second lens is R4, an on-axis thickness of the second lens is d3, and the following relations are satisfied: -5.35 ≤ f2 / f ≤ -0.62; -16.01 ≤ (R3+R4) / (R3-R4) ≤ 11.06; 0.012 ≤ d3 / TTL ≤ 0.036.

[0009] Preferably, a material of the first lens is glass, a material of the second lens is glass, a material of the third lens is glass, and the following relations are satisfied: -1.53 ≤ f3 / f ≤ -0.86; 3.99 ≤ (R5+R6) / (R5-R6) ≤ 7.77; 0.006 ≤ d5 / TTL ≤ 0.067.

[0010] Preferably, the camera optical lens according to claim 1, wherein an F number of the camera optical lens is Fno, and the following relation is satisfied: Fno ≤ 3.00.

[0011] Preferably, an optical total length TTL of the camera optical lens, an image height of a 1.0 field of view of the camera optical lens is IH, and the following relation is satisfied: TTL / IH ≤ 13.91.

[0012] Preferably, the three prisms are made of glass.

[0013] The camera optical lens according to the present application has excellent optical characteristics, meets the design requirements of large aperture, periscopic long focus and miniaturization, and is especially suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

[0015] Figure 1 is a structural schematic diagram of a camera optical lens of a first embodiment of the present application;

[0016] Figure 2 is an axial aberration schematic diagram of the camera optical lens shown in Figure 1

[0017] Figure 3 is a lateral chromatic aberration of magnification schematic diagram of the camera optical lens shown in Figure 1

[0018] Figure 4 is a field curvature and distortion schematic diagram of the camera optical lens shown in Figure 1

[0019] Figure 5 is a structural schematic diagram of a camera optical lens of a second embodiment of the present application;

[0020] Figure 6 is an axial aberration schematic diagram of the camera optical lens shown in Figure 5

[0021] Figure 7 is a lateral chromatic aberration of magnification schematic diagram of the camera optical lens shown in Figure 5

[0022] Figure 8 is a field curvature and distortion schematic diagram of the camera optical lens shown in Figure 5

[0023] Figure 9 is a structural schematic diagram of a camera optical lens of a third embodiment of the present application;

[0024] Figure 10 is an axial aberration schematic diagram of the camera optical lens shown in Figure 9

[0025] Figure 11 is a lateral chromatic aberration of magnification schematic diagram of the camera optical lens shown in Figure 9

[0026] Figure 12 is a field curvature and distortion schematic diagram of the camera optical lens shown in Figure 9

[0027] Figure 13 ​​​​​​​​​is a structural schematic diagram of a camera optical lens of a fourth embodiment of the present application;

[0028] Figure 14 is Figure 13 is an axial aberration schematic diagram of the camera optical lens shown in

[0029] Figure 15 is Figure 13 is a lateral chromatic aberration schematic diagram of the camera optical lens shown in

[0030] Figure 16 is Figure 13 is a field curvature and distortion schematic diagram of the camera optical lens shown in

[0031] Figure 17 is a structural schematic diagram of a camera optical lens of a fifth embodiment of the present application;

[0032] Figure 18 is Figure 17 is an axial aberration schematic diagram of the camera optical lens shown in

[0033] Figure 19 is Figure 17 is a lateral chromatic aberration schematic diagram of the camera optical lens shown in

[0034] Figure 20 is Figure 17 is a field curvature and distortion schematic diagram of the camera optical lens shown in DETAILED DESCRIPTION

[0035] In order to make the objectives, 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 accompanying 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.

[0036] With reference to the accompanying drawings, the technical solutions of the present application provide a camera optical lens 10, 20, 30, 40, 50. Figure 1 、 5 , 9, 13, 17 are the camera optical lenses 10, 20, 30, 40, 50 of the present application, which are composed of a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, a third lens L3 with negative refractive power, and a triangular prism TP arranged in order from the object side to the image side.

[0037] At least one of the first lens L1, the second lens L2 and the third lens L3 is a glass lens.

[0038] The axial distance from the object side surface of the first lens to the image side surface of the third lens of the photographing optical lens 10, 20, 30, 40, 50 is defined as D, and the total optical length of the photographing optical lens 10, 20, 30, 40, 50 is defined as TTL, and the following relationship is satisfied: 0.11≤D / TTL≤0.20, which defines the ratio of the total length of the lens group to the total optical length of the system, and within the conditional range, it is helpful to control the front end length of the periscopic lens.

[0039] The focal length of the photographing optical lens 10, 20, 30, 40, 50 is defined as f, and the following relationship is satisfied: 0.10≤D / f≤0.22, which defines the ratio of the total length of the lens group to the effective focal length of the total optical length of the system, and within the conditional range, it is helpful to realize long-focus imaging.

[0040] The refractive index of the glass lens of the photographing optical lens is defined as ndi, and the following relationship is satisfied: 1.49≤ndi≤1.85, which defines the refractive index of the glass lens used, and within this range, the material properties can be effectively distributed, the aberration can be effectively improved, and the imaging quality can be improved.

[0041] The sag of the image side surface of the third lens at the maximum optical effective diameter is defined as SAG32, and half of the maximum optical effective diameter of the image side surface of the third lens is defined as SD32, and the following relationship is satisfied: 0.32≤|SAG32| / SD32≤0.52, which defines the ratio of the sag of the image side surface of the third lens L3 to the effective half diameter, and within the conditional range, the lens has good stray light performance and is easy to process.

[0042] The focal length of the third lens is defined as f3, the on-axis thickness of the third lens is defined as d5, the radius of curvature of the object side surface of the third lens is defined as R5, and the radius of curvature of the image side surface of the third lens is defined as R6, and the following relationship is satisfied: -20.03≤f3*d5 / (R5-R6)≤-7.99, which is helpful to control the shape of the third lens L3 and is helpful to molding.

[0043] Under the condition of satisfying the above several conditional expressions, the photographing optical lens 10, 20, 30, 40, 50 has good optical performance while meeting the design requirements of large aperture, long focal length, and miniaturization; according to the characteristics of the photographing optical lens 10, 20, 30, 40, 50, the photographing optical lens 10, 20, 30, 40, 50 is especially 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 object side surface of the first lens L1 is convex at the paraxial region, and the image side surface is convex or concave at the paraxial region. The object side surface of the first lens L1 can also be concave.

[0046] The combined focal length of the first lens and the second lens is f12, and 0.57≤f12 / f≤0.71, which defines the ratio of the combined focal length of the first and second lenses to the total focal length of the system. By reasonably distributing the focal length of the system, the system has better imaging quality and lower sensitivity.

[0047] The on-axis thickness of the first lens is d1, and the edge thickness of the first lens is ET1, and 2.48≤d1 / ET1≤4.04, which defines the ratio of the central thickness of the first lens to the edge thickness, which is helpful for the processing of the lens and the assembly of the lens.

[0048] The focal length of the first lens L1 is f1, and the focal length of the overall camera optical lens 10, 20, 30, 40, 50 is f, which satisfies the following relationship: 0.35≤f1 / f≤0.60. When the specified range is met, the first lens has appropriate positive refractive power, which is beneficial to reduce the system aberration and facilitate the miniaturization of the lens.

[0049] The radius of curvature of the object side surface of the first lens L1 is R1, and the radius of curvature of the image side surface of the first lens L1 is R2, which satisfies the following relationship: -1.65≤(R1+R2) / (R1-R2)≤-0.58. Reasonably controlling the shape of the first lens makes the first lens effectively correct the system spherical aberration.

[0050] The on-axis thickness of the first lens L1 is d1, and the total optical length of the overall camera optical lens 10, 20, 30, 40, 50 is TTL, which satisfies the following relationship: 0.055≤d1 / TTL≤0.092, which is beneficial to realize miniaturization.

[0051] The object side surface of the second lens L2 is convex or concave at the paraxial region, and the image side surface is convex or concave at the paraxial region.

[0052] The focal length of the second lens L2 is f2, and the focal length of the overall camera optical lens 10, 20, 30, 40, 50 is f, which satisfies the following relationship: -5.35≤f2 / f≤-0.62. By controlling the negative focal length of the second lens L2 within a reasonable range, it is beneficial to correct the aberration of the optical system.

[0053] The radius of curvature of the object side surface of the second lens L2 is R3, and the radius of curvature of the image side surface of the second lens L2 is R4, which satisfies the following relationship: -16.01≤(R3+R4) / (R3-R4)≤11.06, which defines the shape of the second lens L2. When the range is met, it is beneficial to correct the on-axis chromatic aberration problem as the lens develops towards miniaturization.

[0054] The on-axis thickness of the second lens L2 is d3, and the total length of the overall camera optical lens 10, 20, 30, 40, 50 is TTL, and the following relationship is satisfied: 0.012≤d3 / TTL≤0.036, which is conducive to miniaturization.

[0055] The object side of the third lens L3 is convex at the paraxial region, and the image side is concave at the paraxial region. The object side and the image side of the third lens L3 can also be provided with other concave and convex distribution conditions.

[0056] The focal length of the third lens L3 is f3, and the focal length of the overall camera optical lens 10, 20, 30, 40, 50 is f, and the following relationship is satisfied: -1.53≤f3 / f≤-0.86, which is conducive to the rational distribution of optical power, and the system has better imaging quality and lower sensitivity.

[0057] The radius of curvature of the object side of the third lens L3 is R5, and the radius of curvature of the image side of the third lens L3 is R6, and the following relationship is satisfied: 3.99≤(R5+R6) / (R5-R6)≤7.77, which can effectively control the shape of the third lens L3, and is conducive to the molding of the third lens L3. Within the specified range of the condition formula, the degree of deflection of light passing through the lens can be eased, and the aberration can be effectively reduced.

[0058] The on-axis thickness of the third lens L3 is d5, and the total length of the overall camera optical lens 10, 20, 30, 40, 50 is TTL, and the following relationship is satisfied: 0.006≤d5 / TTL≤0.067, which is conducive to miniaturization.

[0059] By increasing the three-prism TP, the light path can be turned, and the length of the entire optical system can be reduced to adapt to the development trend of small and micro electronic devices.

[0060] The image height of the 1.0 field of view of the camera optical lens 10, 20, 30, 40, 50 is IH, and the total length of the camera optical lens 10, 20, 30, 40, 50 is TTL, and the following relationship is satisfied: TTL / IH≤13.91, which is conducive to miniaturization.

[0061] The aperture F number of the camera optical lens 10, 20, 30, 40, 50 is less than or equal to 3.00, which is a large aperture and has good imaging performance.

[0062] In the present application, an aperture S1 is arranged before the first lens L1 on the object side, which can also be arranged at other positions.

[0063] In the present application, an optical filter GF or the like optical element is arranged between the triangular prism TP and the imaging surface Si. The optical filter GF can be a glass cover plate or an optical filter.

[0064] The imaging optical lens of the present application will be described below with examples. The symbols described in each example are shown below. The units of focal length, on-axis distance, radius of curvature, and on-axis thickness are mm.

[0065] TTL: optical length (on-axis distance from the object side surface of the first lens L1 to the imaging surface Si), unit: mm; F-number FNO: refers to the ratio of the effective focal length of the imaging optical lens to the entrance pupil diameter;

[0066] 1.0 field of view image height IH: the field of view height corresponding to the effective image element of the sensor (i.e. half the diagonal length of the effective image element area of the sensor);

[0067] 1.0 field of view field of view angle FOV: the field of view angle corresponding to the effective image element of the sensor;

[0068] MIC field of view image height IHm: the field of view height expanded by 1.0 to prevent assembly deviation;

[0069] MIC field of view field of view angle FOVm: the field of view angle corresponding to the MIC field of view image height.

[0070] Next, the technical solutions of the present application will be described in detail in five embodiments.

[0071] (First embodiment)

[0072] The first lens L1 has positive refractive power and is made of glass, and its object side surface is convex at the paraxial region, and its image side surface is convex at the paraxial region;

[0073] The second lens L2 has negative refractive power and is made of plastic, and its object side surface is convex at the paraxial region, and its image side surface is concave at the paraxial region;

[0074] The third lens L3 has negative refractive power and is made of plastic, and its object side surface is convex at the paraxial region, and its image side surface is concave at the paraxial region.

[0075] Table 1, Table 2 and Table 3 show the design data of the imaging optical lens 10 of the first embodiment of the present application.

[0076]

Table 1

[0077]

[0078] Wherein, the meanings of each symbol are as follows.

[0079] S1: aperture;

[0080] R: radius of curvature of the optical surface, central radius of curvature in the case of a lens;

[0081] R1: radius of curvature of the object-side surface of the first lens L1;

[0082] R2: radius of curvature of the image-side surface of the first lens L1;

[0083] R3: radius of curvature of the object-side surface of the second lens L2;

[0084] R4: radius of curvature of the image-side surface of the second lens L2;

[0085] R5: radius of curvature of the object-side surface of the third lens L3;

[0086] R6: radius of curvature of the image-side surface of the third lens L3;

[0087] R7: radius of curvature of the object-side surface of the triangular prism TP;

[0088] R8: radius of curvature of the image-side surface of the triangular prism TP;

[0089] R9: radius of curvature of the object-side surface of the optical filter GF;

[0090] R10: radius of curvature of the image-side surface of the optical filter GF;

[0091] d: on-axis thickness of the lens and on-axis distance between the 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 triangular prism TP;

[0099] d7: on-axis thickness of the triangular prism TP;

[0100] d8: on-axis distance from the image-side surface of the triangular prism TP to the object-side surface of the optical filter GF;

[0101] d9: on-axis thickness of optical filter GF;

[0102] d10: on-axis distance from image side surface to image surface of optical filter GF;

[0103] nd: refractive index of d-line;

[0104] nd1: refractive index of d-line of first lens L1;

[0105] nd2: refractive index of d-line of second lens L2;

[0106] nd3: refractive index of d-line of third lens L3;

[0107] nd4: refractive index of d-line of triangular prism TP;

[0108] ndg: refractive index of d-line of optical filter GF;

[0109] vd: Abbe number;

[0110] vd1: Abbe number of first lens L1;

[0111] vd2: Abbe number of second lens L2;

[0112] vd3: Abbe number of third lens L3;

[0113] vd4: Abbe number of triangular prism TP;

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

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

[0116] [Table 2]

[0117]

[0118] 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).

[0119] z = (cr 2 ) / {1 + [1 - (k + 1)(c 2 r 2 )] 1 / 2} + A4r 4 + A6r 6 + A8r 8 + A10r 10 + A12r 12 + A14r 14 + A16r 16

[0120] +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0121] wherein k is a conic constant, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 are aspherical coefficients, c is a curvature at the center of the optical surface, r is a perpendicular distance of a point on the aspherical curve from the optical axis, and z is an aspherical depth (a perpendicular distance between a point on the aspherical curve at a distance r from the optical axis and a tangent plane at the vertex of the aspherical surface).

[0122] Figure 2 、 Figure 3 Figures showing axial aberration and magnification chromatic aberration of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 nm, respectively, after passing through the camera optical lens 10 of the first embodiment. Figure 4 Figures showing field curvature and distortion of light with 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 sagittal field curvature, and T is the tangential field curvature.

[0123] In the present embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 6.363 mm, the 1.0 field image height IH is 3.575 mm, the field of view FOV of 1.0 is 21.79°, the image height IHm of the MIC field of view is 3.695 mm, the field of view FOVm of the MIC field of view is 22.48°, the camera optical lens 10 meets the design requirements of large aperture, long focal length and miniaturization, the on-axis and off-axis chromatic aberration is fully corrected, and has excellent optical characteristics.

[0124] (Second Embodiment)

[0125] The symbol meanings of the second embodiment are the same as those of the first embodiment.

[0126] The difference from the first embodiment is that the image side surface of the first lens L1 is concave at the near axis.

[0127] Tables 3 and 4 show the design data of the camera optical lens 20 of the second embodiment of the present application.

[0128]

Table 3

[0129]

[0130] Table 4 shows aspherical surface data of each lens in the imaging optical lens 20 of the second embodiment of the present application.

[0131]

Table 4

[0132]

[0133]

[0134] Figure 6 、 Figure 7 Figures showing axial aberration and lateral chromatic aberration of light with wavelengths of 656 nm, 588 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 Figures showing field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 20 of the second embodiment are shown respectively, Figure 8 The field curvature S is the sagittal direction field curvature, and T is the tangential direction field curvature.

[0135] In the present embodiment, the entrance pupil diameter ENPD of the imaging optical lens 20 is 5.671 mm, the 1.0 field image height IH is 3.575 mm, the field of view FOV of 1.0 is 24.47°, the image height IHm of the MIC field of view is 3.695 mm, the field of view FOVm of the MIC field of view is 25.24°, the imaging optical lens 20 meets the design requirements of large aperture, long focal length and miniaturization, the on-axis and off-axis chromatic aberration is fully corrected, and has excellent optical characteristics.

[0136] (third embodiment)

[0137] The symbol meanings of the third embodiment are the same as those of the first embodiment.

[0138] The difference from the first embodiment is that the object side surface of the second lens L2 is concave at the paraxial region, and the image side surface is convex at the paraxial region.

[0139] Figure 9 The imaging optical lens 30 of the third embodiment of the present application is shown.

[0140] Tables 5 and 6 show the design data of the imaging optical lens 30 of the third embodiment of the present application.

[0141]

Table 5

[0142]

[0143]

[0144] Table 6 shows aspherical surface data of each lens in the imaging optical lens 30 of the third embodiment of the present application.

[0145] [Table 6]

[0146]

[0147]

[0148] Figure 10 、 Figure 11 Figures showing axial aberration and magnification chromatic aberration of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 nm after passing through the imaging optical lens 30 of the third embodiment are shown respectively. Figure 12 Figures showing field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 30 of the third embodiment are shown respectively, Figure 12 The field curvature S is the sagittal direction field curvature, and T is the tangential direction field curvature.

[0149] In the present embodiment, the entrance pupil diameter ENPD of the imaging optical lens 30 is 5.265 mm, the 1.0 field image height IH is 3.575 mm, the field of view FOV of 1.0 is 26.02°, the image height IHm of the MIC field of view is 3.695 mm, the field of view FOVm of the MIC field of view is 26.83°, the imaging optical lens 30 meets the design requirements of large aperture, long focal length, miniaturization, the on-axis and off-axis chromatic aberration is fully corrected, and has excellent optical characteristics.

[0150] (Fourth Embodiment)

[0151] The symbol meanings of the fourth embodiment are the same as those of the first embodiment.

[0152] The difference from the first embodiment is that the image side surface of the first lens L1 is concave at the near axis.

[0153] Figure 13 The imaging optical lens 40 of the fourth embodiment of the present application is shown.

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

[0155] [Table 7]

[0156]

[0157]

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

[0159] Table 8

[0160]

[0161] Figure 14 , Figure 15 Figures showing the axial aberration and the lateral chromatic aberration of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 nm, respectively, after passing through the camera optical lens 40 of the fourth embodiment. Figure 16 Figures showing the field curvature and the distortion of light with a wavelength of 546 nm after passing through the camera optical lens 40 of the fourth embodiment, 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 16.735 mm, the 1.0 field image height IH is 3.575 mm, the field of view FOV of the 1.0 field is 8.13°, the image height IHm of the MIC field is 3.695 mm, the field of view FOVm of the MIC field is 8.40°, the camera optical lens 40 meets the design requirements of large aperture, long focal length and miniaturization, the on-axis and off-axis chromatic aberration is fully corrected, and has excellent optical characteristics.

[0163] (Fifth Embodiment)

[0164] The symbol meanings of the fifth embodiment are the same as those of the first embodiment.

[0165] The difference from the first embodiment is that the object side surface of the second lens L2 is concave at the near axis.

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

[0167] Table 9, Table 10 show the design data of the camera optical lens 50 of the fifth 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 fifth embodiment of the present application.

[0171] Table 10

[0172]

[0173] Figure 18 , Figure 19Figures showing the axial aberration and the lateral chromatic aberration of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm and 436 nm, respectively, after passing through the camera optical lens 50 of the fifth embodiment. Figure 20 Figures showing the field curvature and distortion of light with a wavelength of 546 nm after passing through the camera optical lens 50 of the fifth embodiment, Figure 20 The field curvature S is the sagittal field curvature, and T is the tangential field curvature.

[0174] In the present embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 5.101 mm, the 1.0 field image height IH is 3.575 mm, the field of view FOV of the 1.0 field is 26.89°, the image height IHm of the MIC field is 3.695 mm, the field of view FOVm of the MIC field is 27.72°, the camera optical lens 50 meets the design requirements of large aperture, long focal length and miniaturization, the on-axis and off-axis chromatic aberration is fully corrected, and has excellent optical characteristics.

[0175] Table 11 appearing later shows the values corresponding to the parameters specified in the various numerical and conditional expressions in the first, second, third, fourth and fifth embodiments.

[0176]

Table 11

[0177]

[0178] 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 is composed of a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power and a triangular prism arranged in sequence from the object side to the image side; at least one of the first lens, the second lens and the third lens is a glass lens; Wherein, the on-axis distance from the object side surface of the first lens to the image side surface of the third lens is D, the total optical length of the camera optical lens is TTL, the focal length of the camera optical lens is f, the refractive index of the glass lens of the camera optical lens is ndi, the sag of the image side surface of the third lens at the maximum optical effective diameter is SAG32, half of the maximum optical effective diameter of the image side surface of the third lens is SD32, the focal length of the third lens is f3, the on-axis thickness of the third lens is d5, the curvature radius of the object side surface of the third lens is R5, the curvature radius of the image side surface of the third lens is R6, and the following relationships are satisfied: 0.11≤D / TTL≤0.20; 0.10≤D / f≤0.22; 1.49≤ndi≤1.85; 0.32≤|SAG32| / SD32≤0.52; -20.03≤f3*d5 / (R5-R6)≤-7.

99.

2. The camera optical lens according to claim 1, wherein, The combined focal length of the first lens and the second lens is f12, and the following relationship is satisfied: 0.57≤f12 / f≤0.

71.

3. The camera optical lens according to claim 1, wherein, The on-axis thickness of the first lens is d1, the edge thickness of the first lens is ET1, and the following relationship is satisfied: 2.48≤d1 / ET1≤4.

04.

4. The camera optical lens according to claim 1, characterized in that, The object side surface of the first lens is convex at the near axis; the focal length of the first lens is f1, 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 on-axis thickness of the first lens is d1, and the following relationships are satisfied: 0.35≤f1 / f≤0.60; -1.65≤(R1+R2) / (R1-R2)≤-0.58; 0.055≤d1 / TTL≤0.

092.

5. The camera optical lens according to claim 1, characterized in that, The focal length of the second lens is f2, the curvature radius of the object side surface of the second lens is R3, the 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: -5.35≤f2 / f≤-0.62; -16.01≤(R3+R4) / (R3-R4)≤11.06; 0.012≤d3 / TTL≤0.

036.

6. The camera optical lens according to claim 1, characterized in that, The object side surface of the third lens is convex at the near axis, the image side surface thereof is concave at the near axis, and the following relationships are satisfied: -1.53≤f3 / f≤-0.86; 3.99≤(R5+R6) / (R5-R6)≤7.77; 0.006≤d5 / TTL≤0.

067.

7. The camera optical lens according to claim 1, wherein, The F number of the camera optical lens is Fno, and the following relationship is satisfied: Fno≤3.

00.

8. The camera optical lens according to claim 1, characterized in that, The total optical length TTL of the camera optical lens, the image height IH of the camera optical lens 1.0 field of view, and the following relationship is satisfied: TTL / IH≤13.

91.

9. The camera optical lens according to claim 1, characterized in that, The three-prism is made of glass. The three-prism is made of glass.

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