Camera optical lens
By designing a camera optical lens composed of positive and negative refractive force lenses and a prism, and satisfying a specific relational formula, the problem of insufficient optical performance of periscope telephoto lenses was solved, realizing a camera lens with a large aperture and miniaturization, suitable for high-pixel camera elements.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- CHANGZHOU RAYTECH OPTRONICS CO LTD
- Filing Date
- 2024-12-31
- Publication Date
- 2026-07-09
AI Technical Summary
The optical performance of existing periscope telephoto camera lenses cannot meet the design requirements of miniaturization and large aperture, and cannot be used with high-pixel camera elements.
The camera optical lens design employs lenses with positive and negative refractive forces and prisms to satisfy specific relationships to control parameters such as the total optical length, focal length, refractive index, and radius of curvature of the lens group, especially the shape and optical characteristics of the third lens, and adds prisms to achieve optical path reversal.
It achieves the design requirements of large aperture, long focal length and miniaturization, and is suitable for high-pixel camera elements, especially mobile phone camera lenses and web camera lenses, with excellent optical characteristics.
Smart Images
Figure CN2024144644_09072026_PF_FP_ABST
Abstract
Description
Camera optical lens Technical Field
[0001] This application relates to the field of optical lenses, and in particular to a camera optical lens suitable for handheld terminal devices such as smartphones and digital cameras, as well as camera devices such as monitors and PC lenses. Background Technology
[0002] In recent years, with the rise of various smart devices, the demand for miniaturized camera lenses has been increasing. Furthermore, due to the shrinking pixel size of image sensors and the current trend of electronic products prioritizing high functionality and lightweight portability, miniaturized camera lenses with good image quality have become mainstream in the market. Telephoto camera lenses can meet consumers' needs for shooting specific targets. Traditional telephoto camera lenses have an excessively large optical length, failing to meet the design requirements of slim and lightweight smartphones. Periscope telephoto camera lens designs can significantly shorten the overall optical length of the camera lens while still meeting telephoto design requirements. However, the optical performance of existing periscope telephoto camera lenses still cannot meet the demands. Summary of the Invention
[0003] To address the aforementioned issues, the purpose of this application is to provide a camera optical lens that can achieve high imaging performance while also meeting the requirements of a large aperture periscope design.
[0004] To address the aforementioned technical problems, embodiments of this application provide a camera optical lens, comprising a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, and a prism, arranged sequentially 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 axial distance from the object 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; and the third lens... The image-side elevation of the third lens at its maximum effective optical diameter is SAG32, half of the maximum effective optical diameter of the image-side elevation of the third lens is SD32, the focal length of the third lens is f3, the axial thickness of the third lens is d5, the radius of curvature of the object-side elevation of the third lens is R5, and the radius of curvature of the image-side elevation of the third lens is R6, satisfying the following relationships: 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, the combined focal length of the first lens and the second lens is f12, and satisfies the following relationship: 0.57≤f12 / f≤0.71.
[0006] Preferably, the axial 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.
[0007] Preferably, the object-side surface of the first lens is convex near the axis; the focal length of the first lens is f1, 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, and the axial 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.
[0008] Preferably, the focal length of the second lens is f2, 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, and the on-axis thickness of the second lens is d3, and satisfies the following relationships: -5.35≤f2 / f≤-0.62; -16.01≤(R3+R4) / (R3-R4)≤11.06; 0.012≤d3 / TTL≤0.036.
[0009] Preferably, the object-side surface of the third lens is convex near the axis, and the image-side surface is concave near the axis, satisfying the following relationships: -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 is characterized in that the aperture F-number of the camera optical lens is Fno, and satisfies the following relationship: Fno≤3.00.
[0011] Preferably, the total optical length TTL of the camera optical lens, the image height IH of the 1.0 field of view of the camera optical lens, and the following relationship are satisfied: TTL / IH≤13.91.
[0012] Preferably, the prism is made of glass.
[0013] The beneficial effects of this application are as follows: the camera optical lens according to this application has excellent optical characteristics, meets the design requirements of large aperture, periscope telephoto 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. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:
[0015] Figure 1 is a schematic diagram of the structure of the camera optical lens according to the first embodiment of this application;
[0016] Figure 2 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 1;
[0017] Figure 3 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 1;
[0018] Figure 4 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 1;
[0019] Figure 5 is a schematic diagram of the structure of the camera optical lens according to the second embodiment of this application;
[0020] Figure 6 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 5;
[0021] Figure 7 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 5;
[0022] Figure 8 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 5;
[0023] Figure 9 is a schematic diagram of the structure of the camera optical lens according to the third embodiment of this application;
[0024] Figure 10 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 9;
[0025] Figure 11 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 9;
[0026] Figure 12 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 9;
[0027] Figure 13 is a schematic diagram of the structure of the camera optical lens according to the fourth embodiment of this application;
[0028] Figure 14 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 13;
[0029] Figure 15 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 13;
[0030] Figure 16 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 13;
[0031] Figure 17 is a schematic diagram of the structure of the camera optical lens according to the fifth embodiment of this application;
[0032] Figure 18 is a schematic diagram of the axial aberration of the camera optical lens shown in Figure 17;
[0033] Figure 19 is a schematic diagram of the magnification chromatic aberration of the camera optical lens shown in Figure 17;
[0034] Figure 20 is a schematic diagram of the field curvature and distortion of the camera optical lens shown in Figure 17. Detailed Implementation
[0035] To make the objectives, technical solutions, and advantages of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this application to facilitate a better understanding of the application. However, the technical solutions claimed in this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.
[0036] Referring to the accompanying drawings, the technical solution of this application provides a camera optical lens 10, 20, 30, 40, and 50. Figures 1, 5, 9, 13, and 17 show the camera optical lens 10, 20, 30, 40, and 50 of this application. The camera optical lens 10, 20, 30, 40, and 50 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 prism TP arranged sequentially 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 of the first lens of the camera optical lenses 10, 20, 30, 40, and 50 to the image side of the third lens is defined as D. The total optical length of the camera optical lenses 10, 20, 30, 40, and 50 is defined as TTL, satisfying the following relationship: 0.11≤D / TTL≤0.20. This specifies the ratio of the total length of the lens group to the total optical length of the system. Within the range of the condition, this helps to control the front end length of the periscope lens.
[0039] The focal length of the camera optical lens 10, 20, 30, 40, and 50 is defined as f, satisfying the following relationship: 0.10≤D / f≤0.22. This specifies the ratio of the total length of the lens group to the effective focal length of the total optical length of the system. Within the range of the condition, this helps to achieve telephoto imaging.
[0040] The refractive index of the glass lens of a camera optical lens is defined as ndi, which satisfies the following relationship: 1.49≤ndi≤1.85. This specifies the refractive index of the glass lens used. Within this range, material properties can be effectively allocated, aberrations can be effectively improved, and image quality can be enhanced.
[0041] The image-side elevation of the third lens at its maximum effective optical diameter is defined as SAG32, and half of the maximum effective optical diameter of the image-side of the third lens is defined as SD32, satisfying the following relationship: 0.32≤|SAG32| / SD32≤0.52. This specifies the ratio of the image-side elevation of the third lens L3 to its effective half-aperture. Within the range of these conditions, the lens exhibits good stray light performance and is easy to manufacture.
[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 of the third lens is defined as R5, and the radius of curvature of the image side of the third lens is defined as R6. The following relationship is satisfied: -20.03≤f3*d5 / (R5-R6)≤-7.99. Within the range of the condition, it helps to control the shape of the third lens L3 and facilitates the shaping.
[0043] Under the above conditions, the camera optical lenses 10, 20, 30, 40, and 50 have good optical performance while meeting the design requirements of large aperture, telephoto, and miniaturization. Based on the characteristics of the camera optical lenses 10, 20, 30, 40, and 50, they are particularly suitable for mobile phone camera lens assemblies and web camera lenses composed of high-pixel CCD, CMOS, and other camera 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 near the axis, and the image-side surface is either convex or concave near the axis. The object-side surface of the first lens L1 can also be set to be concave.
[0046] The combined focal length of the first and second lenses is f12, and 0.57 ≤ f12 / f ≤ 0.71, which specifies the ratio of the combined focal length of the first and second lenses to the total focal length of the system. By rationally allocating the optical focal length of the system, the system achieves better imaging quality and lower sensitivity.
[0047] The axial thickness of the first lens is d1, and the edge thickness of the first lens is ET1. 2.48≤d1 / ET1≤4.04 specifies the ratio of the center thickness to the edge thickness of the first lens, which is helpful for lens processing and lens assembly.
[0048] The focal length of the first lens L1 is f1, and the focal lengths of the overall imaging optical lenses 10, 20, 30, 40, and 50 are f, satisfying the following relationship: 0.35≤f1 / f≤0.60. Within the specified range, the first lens has appropriate positive refractive power, which is beneficial to reducing system aberrations and also conducive to the miniaturization of lenses.
[0049] The radius of curvature of the object side of the first lens L1 is R1, and the radius of curvature of the image side of the first lens L1 is R2, satisfying the following relationship: -1.65≤(R1+R2) / (R1-R2)≤-0.58. By reasonably controlling the shape of the first lens, the first lens can effectively correct the spherical aberration of the system.
[0050] The on-axis thickness of the first lens L1 is d1, and the total optical length of the overall imaging optical lenses 10, 20, 30, 40, and 50 is TTL, satisfying the following relationship: 0.055≤d1 / TTL≤0.092, which is beneficial for miniaturization.
[0051] The object side of the second lens L2 is either convex or concave near the axis, and the image side is either convex or concave near the axis.
[0052] The focal length of the second lens L2 is f2, and the focal lengths of the overall imaging optical lenses 10, 20, 30, 40, and 50 are f, satisfying the following relationship: -5.35≤f2 / f≤-0.62. By controlling the negative optical power of the second lens L2 within a reasonable range, it is beneficial to correct the aberrations of the optical system.
[0053] The radius of curvature of the object side of the second lens L2 is R3, and the radius of curvature of the image side of the second lens L2 is R4, satisfying the following relationship: -16.01≤(R3+R4) / (R3-R4)≤11.06, which defines the shape of the second lens L2. When within this range, as lenses become smaller, it is beneficial to correct on-axis chromatic aberration.
[0054] The on-axis thickness of the second lens L2 is d3, and the total optical length of the overall imaging optical lenses 10, 20, 30, 40, and 50 is TTL, satisfying the following relationship: 0.012≤d3 / TTL≤0.036, which is beneficial for miniaturization.
[0055] The object-side surface of the third lens L3 is convex near the axis, and the image-side surface is concave near the axis. The object-side and image-side surfaces of the third lens L3 can also be configured with other concave and convex distributions.
[0056] The focal length of the third lens L3 is f3, and the focal lengths of the overall imaging optical lenses 10, 20, 30, 40, and 50 are f, satisfying the following relationship: -1.53≤f3 / f≤-0.86. Through the reasonable allocation of optical power, 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. The following relationship is satisfied: 3.99≤(R5+R6) / (R5-R6)≤7.77. This can effectively control the shape of the third lens L3, which is beneficial to the shaping of the third lens L3. Within the range specified by the condition formula, it can mitigate the degree of light deflection after passing through the lens and effectively reduce aberrations.
[0058] The on-axis thickness of the third lens L3 is d5, and the total optical length of the overall imaging optical lenses 10, 20, 30, 40, and 50 is TTL, satisfying the following relationship: 0.006≤d5 / TTL≤0.067, which is beneficial for miniaturization.
[0059] By adding a prism (TP), the optical path can be redirected, thereby reducing the length of the entire optical system to adapt to the development trend of miniaturized and micro-miniaturized electronic devices.
[0060] The image height of the 1.0 field of view of the camera optical lenses 10, 20, 30, 40, and 50 is IH. The total optical length TTL of the camera optical lenses 10, 20, 30, 40, and 50 satisfies the following relationship: TTL / IH≤13.91, which is beneficial for miniaturization.
[0061] Camera optical lenses with apertures of 10, 20, 30, 40, and 50mm have an aperture of F-number less than or equal to 3.00, providing large aperture and good imaging performance.
[0062] In this application, an aperture S1 is provided on the object side and in front of the first lens L1. The aperture S1 can also be provided in other positions.
[0063] In this application, an optical element such as an optical filter GF is disposed between the prism TP and the imaging surface Si. The optical filter GF can be a glass cover or an optical filter. The optical filter GF can also be disposed in other locations.
[0064] The imaging optical lens of this application will be illustrated below with examples. The symbols used in each example are shown below. The units for focal length, on-axis distance, radius of curvature, and on-axis thickness are mm.
[0065] TTL: Optical length (the axial distance from the object side of the first lens L1 to the imaging plane Si), in mm; Aperture value FNO: refers to the ratio of the effective focal length to the entrance pupil diameter of the camera lens;
[0066] Image height IH of 1.0 field of view: The field of view height corresponding to the effective pixel of the sensor (i.e., half the diagonal length of the effective pixel area of the sensor);
[0067] 1.0 Field of View (FOV): The field of view angle corresponding to the effective pixel of the sensor;
[0068] Image height IHm of MIC field of view: The field of view height extended beyond 1.0 to prevent assembly deviation;
[0069] FOVm: The field of view angle corresponding to the image height of the MIC field of view.
[0070] The technical solution of this application will be described in detail below with five implementation methods.
[0071] (First Implementation)
[0072] The first lens L1 has positive refractive power and is made of glass. Its object side is convex at the paraxial position, and its image side is convex at the paraxial position.
[0073] The second lens L2 has negative refractive power and is made of plastic. Its object side is convex near the axis, and its image side is concave near the axis.
[0074] The third lens L3 has negative refractive power and is made of plastic. Its object side is convex near the axis, and its image side is concave near the axis.
[0075] Tables 1, 2 and 3 show the design data of the camera optical lens 10 according to the first embodiment of this application.
[0076] Table 1
[0077] The meanings of each symbol are as follows.
[0078] S1: Aperture;
[0079] R: Radius of curvature of the optical surface; for lenses, it is the central radius of curvature.
[0080] R1: Radius of curvature of the object side surface of the first lens L1;
[0081] R2: Radius of curvature of the image side of the first lens L1;
[0082] R3: Radius of curvature of the object side surface of the second lens L2;
[0083] R4: Radius of curvature of the image side of the second lens L2;
[0084] R5: Radius of curvature of the object side surface of the third lens L3;
[0085] R6: Radius of curvature of the image side of the third lens L3;
[0086] R7: Radius of curvature of the side surface of the prism TP;
[0087] R8: Radius of curvature of the side surface of the prism TP image;
[0088] R9: Radius of curvature of the object-side surface of the optical filter GF;
[0089] R10: Radius of curvature of the image-side surface of the optical filter GF;
[0090] d: The axial thickness of the lens and the axial distance between lenses;
[0091] d0: The axial distance from aperture S1 to the object-side surface of the first lens L1;
[0092] d1: On-axis thickness of the first lens L1;
[0093] d2: The on-axis distance from the image-side surface of the first lens L1 to the object-side surface of the second lens L2;
[0094] d3: On-axis thickness of the second lens L2;
[0095] d4: The axial distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;
[0096] d5: On-axis thickness of the third lens L3;
[0097] d6: The axial distance from the image-side surface of the third lens L3 to the object-side surface of the prism TP;
[0098] d7: On-axis thickness of prism TP;
[0099] d8: The axial distance from the image-side surface of the prism TP to the object-side surface of the optical filter GF;
[0100] d9: On-axis thickness of the optical filter GF;
[0101] d10: The axial distance from the image-side surface of the optical filter GF to the image plane;
[0102] nd: Refractive index of the d-line;
[0103] nd1: The refractive index of the d-line of the first lens L1;
[0104] nd2: The refractive index of the d-line of the second lens L2;
[0105] nd3: The refractive index of the d-line of the third lens L3;
[0106] nd4: The refractive index of the d-line of the prism TP;
[0107] ndg: The 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 prism TP;
[0113] vdg: Abbe number of the GF of the optical filter.
[0114] Table 2 shows the aspherical data of each lens in the camera optical lens 10 of the first embodiment of this application.
[0115] Table 2
[0116] For convenience, the aspherical surfaces of each lens surface are those shown in formula (1) below. However, this application is not limited to the aspherical polynomial form represented by formula (1). z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)
[0117] Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 are aspheric coefficients, c is the curvature at the center of the optical surface, r is the perpendicular distance between a point on the aspheric curve and the optical axis, and z is the aspheric depth (the perpendicular distance between a point on the aspheric surface at a distance r from the optical axis and a tangent plane at the vertex of the aspheric optical axis).
[0118] Figures 2 and 3 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656nm, 588nm, 546nm, 486nm, and 436nm passes through the camera optical lens 10 of the first embodiment, respectively. Figure 4 shows schematic diagrams of field curvature and distortion after light with a wavelength of 546nm passes through the camera optical lens 10 of the first embodiment. In Figure 4, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.
[0119] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 is 6.363mm, the image height IH of the 1.0 field of view is 3.575mm, the field of view FOV of the 1.0 field of view is 21.79°, the image height IHm of the MIC field of view is 3.695mm, and 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. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
[0120] (Second Implementation)
[0121] The symbols in the second embodiment have the same meanings as those in the first embodiment.
[0122] Unlike the first embodiment, the image-side surface of the first lens L1 is concave near the axis.
[0123] Tables 3 and 4 show the design data of the camera optical lens 20 according to the second embodiment of this application.
[0124] Table 3
[0125] Table 4 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of this application.
[0126] Table 4
[0127] Figures 6 and 7 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656nm, 588nm, 546nm, 486nm, and 436nm passes through the camera optical lens 20 of the second embodiment, respectively. Figure 8 shows a schematic diagram of field curvature and distortion after light with a wavelength of 546nm passes through the camera optical lens 20 of the second embodiment. In Figure 8, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.
[0128] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 is 5.671mm, the image height IH of the 1.0 field of view is 3.575mm, the field of view FOV of the 1.0 field of view is 24.47°, the image height IHm of the MIC field of view is 3.695mm, and the field of view FOVm of the MIC field of view is 25.24°. The camera optical lens 20 meets the design requirements of large aperture, long focal length, and miniaturization. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
[0129] (Third Implementation)
[0130] The symbols in the third embodiment have the same meanings as those in the first embodiment.
[0131] Unlike the first embodiment, the object side of the second lens L2 is concave near the axis, and the image side is convex near the axis.
[0132] Figure 9 shows the camera optical lens 30 of the third embodiment of this application.
[0133] Tables 5 and 6 show the design data of the camera optical lens 30 according to the third embodiment of this application.
[0134] Table 5
[0135] Table 6 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of this application.
[0136] Table 6
[0137] Figures 10 and 11 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm passes through the camera optical lens 30 of the third embodiment, respectively. Figure 12 shows schematic diagrams of field curvature and distortion after light with a wavelength of 546 nm passes through the camera optical lens 30 of the third embodiment. In Figure 12, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.
[0138] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 5.265mm, the image height IH of the 1.0 field of view is 3.575mm, the field of view FOV of the 1.0 field of view is 26.02°, the image height IHm of the MIC field of view is 3.695mm, and the field of view FOVm of the MIC field of view is 26.83°. The camera optical lens 30 meets the design requirements of large aperture, long focal length, and miniaturization. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
[0139] (Fourth Implementation)
[0140] The symbols in the fourth embodiment have the same meanings as those in the first embodiment.
[0141] Unlike the first embodiment, the image-side surface of the first lens L1 is concave near the axis.
[0142] Figure 13 shows the camera optical lens 40 of the fourth embodiment of this application.
[0143] Tables 7 and 8 show the design data of the camera optical lens 40 according to the fourth embodiment of this application.
[0144] Table 7
[0145] Table 8 shows the aspherical data of each lens in the camera optical lens 40 of the fourth embodiment of this application.
[0146] Table 8
[0147] Figures 14 and 15 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm passes through the camera optical lens 40 of the fourth embodiment, respectively. Figure 16 shows a schematic diagram of field curvature and distortion after light with a wavelength of 546 nm passes through the camera optical lens 40 of the fourth embodiment. In Figure 16, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.
[0148] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 16.735mm, the image height IH of the 1.0 field of view is 3.575mm, the field of view FOV of the 1.0 field of view is 8.13°, the image height IHm of the MIC field of view is 3.695mm, and the field of view FOVm of the MIC field of view is 8.40°. The camera optical lens 40 meets the design requirements of large aperture, long focal length, and miniaturization. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
[0149] (Fifth Implementation)
[0150] The symbols in the fifth embodiment have the same meanings as those in the first embodiment.
[0151] Unlike the first embodiment, the object-side surface of the second lens L2 is concave near the axis.
[0152] Figure 17 shows the camera optical lens 50 of the fifth embodiment of this application.
[0153] Tables 9 and 10 show the design data of the camera optical lens 50 according to the fifth embodiment of this application.
[0154] Table 9
[0155] Table 10 shows the aspherical data of each lens in the camera optical lens 50 of the fifth embodiment of this application.
[0156] Table 10
[0157] Figures 18 and 19 show schematic diagrams of axial aberration and magnification chromatic aberration after light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm passes through the camera optical lens 50 of the fifth embodiment, respectively. Figure 20 shows a schematic diagram of field curvature and distortion after light with a wavelength of 546 nm passes through the camera optical lens 50 of the fifth embodiment. In Figure 20, the field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.
[0158] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 5.101mm, the image height IH of the 1.0 field of view is 3.575mm, the field of view FOV of the 1.0 field of view is 26.89°, the image height IHm of the MIC field of view is 3.695mm, and the field of view FOVm of the MIC field of view is 27.72°. The camera optical lens 50 meets the design requirements of large aperture, long focal length, and miniaturization. Its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
[0159] Table 11, which appears later, shows the values corresponding to the parameters specified in the conditional expressions for various numerical values in each of the first, second, third, fourth, and fifth implementation methods.
[0160] Table 11
[0161] Those skilled in the art will understand that the above embodiments are specific implementations of this application, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of this 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 prism arranged sequentially 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 axial 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 imaging optical lens is TTL, the focal length of the imaging optical lens is f, the refractive index of the glass lens of the imaging optical lens is ndi, the sag of the image-side surface of the third lens at the maximum effective optical diameter is SAG32, half of the maximum effective optical diameter of the image-side surface of the third lens is SD32, the focal length of the third lens is f3, the axial thickness of the third lens is d5, 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, satisfying the following relationship: 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, characterized in that, The combined focal length of the first lens and the second lens is f12, and satisfies the following relationship: 0.57≤f12 / f≤0.
71.
3. The camera optical lens according to claim 1, characterized in that, The axial thickness of the first lens is d1, and the edge thickness of the first lens is ET1, and they satisfy the following relationship: 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 near the axis; the focal length of the first lens is f1, 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, and the axial 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 second lens has a focal length of f2, a radius of curvature of the object side of the second lens of R3, a radius of curvature of the image side of the second lens of R4, and an on-axis thickness of d3, and satisfies the following relationships: -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 near the axis, and the image-side surface is concave near the axis, satisfying the following relationships: -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, characterized in that, The aperture number of the camera optical lens is Fno, and it satisfies the following relationship: 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 1.0 field of view of the camera optical lens, and satisfy the following relationship: TTL / IH≤13.
91.
9. The camera optical lens according to claim 1, characterized in that, The prism is made of glass.