Optical camera lens
By optimizing the lens combination and material selection, a movable and adjustable camera optical lens was designed, which solved the design requirements of long focal length, high magnification, and miniaturization, and realized focal length switching and optical performance improvement.
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
Smart Images
Figure CN2024144454_09072026_PF_FP_ABST
Abstract
Description
Camera optical lens [Technical Field]
[0001] This invention relates to the field of optical lenses, and particularly to a camera optical lens. [Background Technology]
[0002] In recent years, with the rise of smartphones, the demand for miniaturized camera lenses has been increasing. Due to the advancement of semiconductor manufacturing technology, the pixel size of image sensors has been reduced. In addition, the current trend of electronic products is towards high functionality and a slim and compact design. Therefore, miniaturized camera lenses with good image quality have become the mainstream in the market.
[0003] With technological advancements and increasingly diverse user demands, as the pixel area of image sensors continues to shrink and system requirements for image quality rise, three-element, four-element, and even five-element lens structures have gradually emerged in lens designs. However, with further technological advancements and increasingly diverse user demands, as the pixel area of image sensors continues to shrink and system requirements for image quality rise, six-element lens structures have gradually appeared in lens designs. While common six-element lenses already possess good optical performance, their optical power, lens spacing, and lens shape still have certain limitations. This means that while the lens structure offers good optical performance, it cannot meet the design requirements of long focal lengths, high magnification, and miniaturization. [Summary of the Invention]
[0004] The technical problem to be solved by the present invention is to provide a camera optical lens that can achieve high imaging performance while meeting the requirements of long focal length, high magnification and miniaturization.
[0005] To solve the above-mentioned technical problems, the present invention provides a camera optical lens, which is composed of a first prism with positive refractive power, a first lens with negative refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth lens arranged sequentially from the object side to the image side; a reflective surface is provided between the object side and the image side of the first prism; the first lens, the second lens, the third lens, the fourth lens, and the fifth lens constitute a lens assembly, which is adjustable and movable along the optical axis of the camera optical lens, so that the camera optical lens can switch between a first state and a second state, wherein the focal length of the camera optical lens is the largest in the first state and the focal length of the camera optical lens is the smallest in the second state;
[0006] The focal length of the camera optical lens in the first state is fA, the image height of the camera optical lens is IH, the distance on the optical axis between the lens surface closest to the object side and the lens surface closest to the image side in the first state is Lp, the radius of curvature of the object side of the first prism is Rp1, the radius of curvature of the image side of the first prism is Rp2, the radius of curvature of the object side of the fifth lens is R9, the radius of curvature of the image side of the fifth lens is R10, and the total optical length of the camera optical lens is TTL, and satisfies the following relationships: 1. 90≤fA*IH / TTL≤2.20; 0.25≤Lp / TTL≤0.41; 0.00≤Rp1 / Rp2≤1.11; 3.00≤(R9+R10) / (R9-R10)≤30.20.
[0007] Furthermore, the on-axis thicknesses of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are d1, d3, d5, d7, and d9, respectively, and satisfy the following relationship: 2.40≤(d1+d3+d5) / (d7+d9)≤3.00.
[0008] Furthermore, the image-side surface of the first prism is concave near the axis, the focal length of the first prism is fp1, and the sum of the axial distance from the object-side surface of the first prism to the reflecting surface and the axial distance from the reflecting surface of the first prism to the image-side surface is dp1, satisfying the following relationships: 3.22≤fp1 / fA≤7.98; 0.322≤dp1 / TTL≤0.363.
[0009] Furthermore, the object-side surface of the first lens is convex near the axis, the image-side surface of the first lens is concave 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 satisfies the following relationships: -0.80≤f1 / fA≤-0.57; 2.83≤(R1+R2) / (R1-R2)≤3.48; 0.029≤d1 / TTL≤0.060.
[0010] Furthermore, the object-side surface of the second lens is convex at the paraxial position, the image-side surface of the second lens is convex at the paraxial position, the focal length of the second lens is f2, the radius of curvature of the object-side surface of the second lens is R3, the radius of curvature of the image-side surface of the second lens is R4, and the axial thickness of the second lens is d3, and the following relationships are satisfied: 0.34≤f2 / fA≤0.41; -0.96≤(R3+R4) / (R3-R4)≤-0.67; 0.067≤d3 / TTL≤0.084.
[0011] Furthermore, the focal length of the third lens is f3, the radius of curvature of the object side of the third lens is R5, the radius of curvature of the image side of the third lens is R6, and the axial thickness of the third lens is d5, and the following relationships are satisfied: -15.12≤f3 / fA≤-0.86; -1.74≤(R5+R6) / (R5-R6)≤2.02; 0.048≤d5 / TTL≤0.078.
[0012] Furthermore, the object-side surface of the fourth lens is convex near the axis, the image-side surface of the fourth lens is convex near the axis, the focal length of the fourth lens is f4, the radius of curvature of the object-side surface of the fourth lens is R7, the radius of curvature of the image-side surface of the fourth lens is R8, and the axial thickness of the fourth lens is d7, satisfying the following relationships: 1.09≤f4 / fA≤2.50; -10.76≤(R7+R8) / (R7-R8)≤-2.02; 0.037≤d7 / TTL≤0.042.
[0013] Furthermore, the object-side surface of the fifth lens is convex near the axis, and the image-side surface of the fifth lens is concave near the axis. The focal length of the fifth lens is f5, the radius of curvature of the object-side surface of the fifth lens is R9, the radius of curvature of the image-side surface of the fifth lens is R10, and the axial thickness of the fifth lens is d9, satisfying the following relationships: -8.59≤f5 / fA≤494.45; 0.027≤d9 / TTL≤0.051.
[0014] Furthermore, the first prism is made of glass.
[0015] The beneficial effects of the present invention are as follows: the camera optical lens according to the present invention can achieve internal focusing based on the movement of its lens group, has excellent optical performance, and has the characteristics of long focal length, high magnification and miniaturization. [Attached Image Description]
[0016] Figure 1 is a schematic diagram of the structure of the camera optical lens 10 in the first state according to the first embodiment of the present invention;
[0017] Figure 2 is a schematic diagram of the magnification chromatic aberration of the camera optical lens 10 shown in Figure 1;
[0018] Figure 3 is a schematic diagram of the axial aberration of the camera optical lens 10 shown in Figure 1;
[0019] Figure 4 is a schematic diagram of the field curvature and distortion of the camera optical lens 10 shown in Figure 1;
[0020] Figure 5 is a schematic diagram of the structure of the camera optical lens 20 in the first state according to the second embodiment of the present invention;
[0021] Figure 6 is a schematic diagram of the magnification chromatic aberration of the camera optical lens 20 shown in Figure 5;
[0022] Figure 7 is a schematic diagram of the axial aberration of the camera optical lens 20 shown in Figure 5;
[0023] Figure 8 is a schematic diagram of the field curvature and distortion of the camera optical lens 20 shown in Figure 5;
[0024] Figure 9 is a schematic diagram of the structure of the camera optical lens 30 in the first state according to the third embodiment of the present invention;
[0025] Figure 10 is a schematic diagram of the magnification chromatic aberration of the camera optical lens 30 shown in Figure 9;
[0026] Figure 11 is a schematic diagram of the axial aberration of the camera optical lens 30 shown in Figure 9;
[0027] Figure 12 is a schematic diagram of the field curvature and distortion of the camera optical lens 30 shown in Figure 9;
[0028] Figure 13 is a schematic diagram of the structure of the camera optical lens 40 in the first state according to the fourth embodiment of the present invention;
[0029] Figure 14 is a schematic diagram of the magnification chromatic aberration of the camera optical lens 40 shown in Figure 13;
[0030] Figure 15 is a schematic diagram of the axial aberration of the camera optical lens 40 shown in Figure 13;
[0031] Figure 16 is a schematic diagram of the field curvature and distortion of the camera optical lens 40 shown in Figure 13;
[0032] Figure 17 is a schematic diagram of the camera optical lens 50 in the first state according to the fourth embodiment of the present invention;
[0033] Figure 18 is a schematic diagram of the magnification chromatic aberration of the camera optical lens 50 shown in Figure 17;
[0034] Figure 19 is a schematic diagram of the axial aberration of the camera optical lens 50 shown in Figure 17;
[0035] Figure 20 is a schematic diagram of the field curvature and distortion of the camera optical lens 50 shown in Figure 17.
Detailed Implementation Methods
[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0037] This invention provides a camera optical lens 10-50. The camera optical lens 10-50 comprises, in sequence from the object side to the image side, a first prism P1 with positive refractive power, a first lens L1 with negative refractive power, an aperture S1, a second lens L2 with positive refractive power, a third lens L3 with negative refractive power, a fourth lens L4 with positive refractive power, and a fifth lens L5; a reflective surface is provided between the object side and the image side of the first prism P1.
[0038] The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 constitute a lens assembly. The lens assembly is adjustable and movable along the optical axis of the camera optical lens 10-50, allowing the camera optical lens 10-50 to switch between a first state and a second state. The camera optical lens 10-50 has the largest focal length in the first state and the smallest focal length in the second state.
[0039] The lens assembly is located between the first prism P1 and the image plane SI, and the lens assembly can move along the optical axis of the imaging optical lens 10-50, making the axial distance between the image side of the first prism P1 and the object side of the lens assembly, as well as the axial distance between the image side of the lens assembly and the image plane, adjustable. This lens assembly is a movable zoom group; by moving the first lens group, the focal length of the imaging optical lens 10-50 can be changed, resulting in good imaging performance in both the first and second states. The first state refers to the state with the maximum focal length of the imaging optical lens 10-50, and the second state refers to the state with the minimum focal length. For example, the first state can be a telephoto state or a state with an infinity object distance; the second state can be a short focal length state or a macro state. Thus, the imaging optical lens 10-50 can achieve in-lens focusing by moving the group to focus.
[0040] The focal length of the camera optical lens 10-50 in the first state is fA, the image height is IH, and the total optical length is TTL, satisfying the following relationship: 1.90 ≤ fA*IH / TTL ≤ 2.20. This specifies the ratio of the product of the focal length and image height of the optical system of the camera optical lens 10-50 to the total optical length. An optical system satisfying this relationship has a longer focal length with a fixed image height, which helps to improve the system magnification.
[0041] The distance on the optical axis between the lens surface closest to the object side and the lens surface closest to the image side of the imaging optical lens 10-50 in the first state is defined as Lp, satisfying the following relationship: 0.25≤Lp / TTL≤0.41. This specifies the ratio of the lens group to the total length of the imaging optical lens 10-50, which, within the range of the condition, helps to compress the total optical length of the imaging optical lens 10-50.
[0042] The object-side radius of curvature of the first prism P1 is defined as Rp1, and the image-side radius of curvature of the first prism P1 is defined as Rp2, satisfying the following relationship: 0.00≤Rp1 / Rp2≤1.11. The concave-convex shape of the first prism P1 is specified, which, within the range of the condition, helps to mitigate the degree of light refraction after passing through the lens and can effectively reduce aberrations.
[0043] The object-side radius of curvature of the fifth lens L5 is defined as R9, and the image-side radius of curvature of the fifth lens L5 is defined as R10, satisfying the following relationship: 3.00≤(R9+R10) / (R9-R10)≤30.20. This defines the shape of the fifth lens L5, which, within the given condition, helps to mitigate the degree of light refraction after passing through the lens and effectively reduces aberrations.
[0044] When the focal length, image height, total optical length, focal length, on-axis thickness, and radius of curvature of each lens of the camera optical lens 10-50 described in this invention satisfy the above-mentioned relationship, the camera optical lens 10-50 can meet the design requirements of long focal length, high magnification, and miniaturization.
[0045] Based on the above conditional expressions and the functions that can be achieved, the characteristics of each lens are further refined as follows.
[0046] The on-axis thicknesses of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 are defined as d1, d3, d5, d7, and d9, respectively, satisfying the following relationship: 2.40 ≤ (d1 + d3 + d5) / (d7 + d9) ≤ 3.00. This specifies the thickness relationship of the lens groups in the imaging optical lens 10-50. By rationally allocating the thickness between the lenses, it is beneficial to reduce the assembly difficulty in the actual production process and improve the yield rate.
[0047] In this invention, the object-side surface of the first prism P1 is convex near the axis, and the image-side surface of the first prism P1 is concave or flat near the axis. The object-side surface and image-side surface of the first prism P1 can also be configured with other surface distributions.
[0048] The focal length of the first prism P1 is defined as fp1, satisfying the following relationship: 3.22≤fp1 / fA≤7.98, which specifies the positive refractive power of the first prism P1. Within this value range, it helps to reduce aberrations and improve the imaging quality of the camera lens 10-50.
[0049] The sum of the axial distance from the object side to the reflecting surface of the first prism P1 and the axial distance from the reflecting surface to the image side of the first prism is defined as dp1, which satisfies the following relationship: 0.322≤dp1 / TTL≤0.363, which is beneficial for reasonably controlling the total optical length of the camera lens.
[0050] In this invention, the object-side surface of the first lens L1 is convex near the axis, and the image-side surface of the first lens L1 is concave near the axis. The object-side surface and image-side surface of the first lens L1 can also be configured with other concave and convex distributions.
[0051] The focal length of the first lens L1 is defined as f1, which satisfies the following relationship: -0.80≤f1 / fA≤-0.57. By controlling the negative optical power of the first lens L1 within a reasonable range, it is beneficial to correct the aberrations of the optical system.
[0052] The radius of curvature of the object side of the first lens L1 is defined as R1, and the radius of curvature of the image side of the first lens L1 is defined as R2, which satisfies the following relationship: 2.83≤(R1+R2) / (R1-R2)≤3.48. This defines the shape of the first lens L1. When it is within the range, as lenses develop towards miniaturization, it is beneficial to correct on-axis chromatic aberration.
[0053] The on-axis thickness of the first lens L1 is defined as d1, which satisfies the following relationship: 0.029≤d1 / TTL≤0.060, which is beneficial for reasonably controlling the total optical length of the camera lens.
[0054] In this invention, the object-side surface of the second lens L2 is convex near the axis, and the image-side surface of the second lens L2 is also convex near the axis. The object-side and image-side surfaces of the second lens L2 can also be configured with other concave and convex distributions.
[0055] The focal length L2 of the first lens is defined as f2, which satisfies the following relationship: 0.34≤f2 / fA≤0.41. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.
[0056] The radius of curvature of the object side of the second lens L2 is defined as R3, and the radius of curvature of the image side of the second lens L2 is defined as R4. The following relationship is satisfied: -0.96≤(R3+R4) / (R3-R4)≤-0.67. This can effectively control the shape of the second lens L2, which is beneficial to the forming of the second lens L2 and avoids poor forming and stress caused by excessive surface curvature of the second lens L2.
[0057] The on-axis thickness of the second lens L2 is defined as d3, which satisfies the following relationship: 0.067≤d3 / TTL≤0.084, which is beneficial for reasonably controlling the total optical length of the camera lens.
[0058] In this invention, the object-side surface of the third lens L3 is concave near the axis, and the image-side surface of the third lens L3 is also concave near the axis. The object-side and image-side surfaces of the third lens L3 can also be configured with other concave or convex distributions.
[0059] The focal length of the third lens L3 is defined as f3, which satisfies the following relationship: -15.12≤f3 / fA≤-0.86. Through the reasonable allocation of optical power, the system has better imaging quality and lower sensitivity.
[0060] The radius of curvature of the object side of the third lens L3 is defined as R5, and the radius of curvature of the image side of the third lens L3 is defined as R6, satisfying the following relationship: -1.74≤(R5+R6) / (R5-R6)≤2.02. This specifies the shape of the third lens L3. When it is within this range, with the development of miniaturization, it is beneficial to correct aberrations and other problems in off-axis drawing angles.
[0061] The on-axis thickness of the third lens L3 is defined as d5, satisfying the following relationship: 0.048≤d5 / TTL≤0.078. This specifies the ratio of the on-axis thickness of the third lens L3 to the total optical length TTL of the 10-50 camera lens, which is beneficial for the reasonable control of the total optical length of the camera lens.
[0062] In this invention, the object-side surface of the fourth lens L4 is convex near the axis, and the image-side surface of the fourth lens L4 is concave near the axis. The object-side and image-side surfaces of the fourth lens L4 can also be configured with other concave / convex distributions.
[0063] The focal length of the fourth lens L4 is defined as f4, satisfying the following relationship: 1.09≤f4 / fA≤2.50. The limitation of the fourth lens L4 can effectively make the light angle of the camera lens smoother and reduce tolerance sensitivity.
[0064] The curvature radius R7 of the object side of the fourth lens L4 and the curvature radius R8 of the image side of the fourth lens L4 are defined to satisfy the following relationship: -10.76≤(R7+R8) / (R7-R8)≤-2.02. This specifies the shape of the fourth lens L4. Within the specified range, with the development of miniaturization, it is beneficial to correct aberrations and other problems in off-axis drawing angles.
[0065] The on-axis thickness of the fourth lens L4 is defined as d7, which satisfies the following relationship: 0.037≤d7 / TTL≤0.042, which is beneficial for reasonably controlling the total optical length of the camera lens.
[0066] In this invention, the fifth lens L5 has positive or negative refractive power. The object-side surface of the fifth lens L5 is convex near the axis, and the image-side surface of the fifth lens L5 is concave near the axis. The object-side and image-side surfaces of the fifth lens L5 can also be configured with other concave and convex distributions.
[0067] The focal length of the fifth lens L5 is defined as f5, satisfying the following relationship: -8.59≤f5 / fA≤494.45. The limitation of the fifth lens L5 can effectively make the light angle of the camera lens smoother and reduce tolerance sensitivity.
[0068] The on-axis thickness of the fifth lens L5 is defined as d9, which satisfies the following relationship: 0.027≤d9 / TTL≤0.051, which is beneficial for reasonably controlling the total optical length of the camera lens.
[0069] In this invention, the first prism P1 is made of glass; the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 are all made of plastic. In other optional embodiments, the first prism P1 and each lens can also be made of other materials.
[0070] In this invention, an optical element such as an optical filter GF can be disposed between the fifth lens L5 and the image plane SI. The optical filter GF can be a glass cover or an optical filter.
[0071] In this invention, an aperture S1 is also provided between the first lens L1 and the second lens L2. The aperture S1 can also be provided in other positions.
[0072] Specific feasible implementation plans are described below.
[0073] The camera optical lens of the present invention will be described below with examples. The symbols described in each example are as follows. The units for focal length, on-axis distance, radius of curvature, and on-axis thickness are mm.
[0074] TTL: Total optical length (the axial distance from the object surface of the first prism P1 to the image plane SI), in mm;
[0075] The technical solution of the present invention will be described in detail below with five implementation methods.
[0076] First Implementation Method
[0077] The first prism P1 has positive refractive force, its object side is convex near the axis, and its image side is concave near the axis.
[0078] The first lens L1 has negative refractive power, its object side is convex near the axis, and its image side is concave near the axis;
[0079] The second lens L2 has positive refractive power, and its object side is convex near the axis, while its image side is convex near the axis.
[0080] The third lens L3 has negative refractive power, and its object side is concave near the axis, while its image side is concave near the axis.
[0081] The fourth lens L4 has positive refractive power; its object side is convex near the axis, and its image side is concave near the axis.
[0082] The fifth lens L5 has negative refractive power. Its object side is convex near the axis, and its image side is concave near the axis.
[0083] Table 1 shows the design data of the camera optical lens 10 according to the first embodiment of the present invention.
[0084] Table 1 Design data of camera optical lens 10
[0085] Where d1 = “dp1-01” + “dp1-02”, “dp1-01” = 4.460mm, “dp1-02” = 4.240mm.
[0086] Table 2 shows the relevant optical parameters of the camera lens 10 according to the first embodiment of the present invention in the first state (infinity focus state) and the second state (macro focus state).
[0087] Table 2. Relevant optical parameters of camera lenses under different focusing states.
[0088] The meanings of each symbol are as follows. S1: Aperture; R: Radius of curvature of the optical surface, or the center radius of curvature of the lens; Rp1: Radius of curvature of the object-side surface of the first prism P1; Rp2: Radius of curvature of the image-side surface of the first prism P1; R1: Radius of curvature of the object-side surface of the first lens L1; R2: Radius of curvature of the image-side surface of the first lens L1; R3: Radius of curvature of the object-side surface of the second lens L2; R4: Radius of curvature of the image-side surface of the second lens L2; R5: Radius of curvature of the object-side surface of the third lens L3; R6: Radius of curvature of the image-side surface of the third lens L3; R7: Radius of curvature of the object-side surface of the fourth lens L4; R8: Radius of curvature of the image-side surface of the fourth lens L4; R9: Radius of curvature of the object-side surface of the fifth lens L5; R10: Radius of curvature of the image-side surface of the fifth lens L5; R11: Radius of curvature of the object-side surface of the optical filter GF; R12: Radius of curvature of the image-side surface of the optical filter GF; d: Axial thickness of the lens; Axial distance between lenses; d0: Axial distance from aperture S1 to the object-side surface of the first prism P1; dp1: Sum of the axial distance from the object-side surface of the first prism P1 to the reflecting surface and the axial distance from the reflecting surface to the image-side surface of the first prism P1; dp1-01: Axial distance from the object-side surface of the first prism P1 to the reflecting surface; dp1-02: Axial distance from the reflecting surface of the first prism P1 to the image-side surface; dp2: Axial distance from the image-side surface of the first prism P1 to the object-side surface of the first lens L1; d1: Axial thickness of the first lens L1; d2: Axial distance from the image-side surface of the first lens L1 to the object-side surface of the second lens L2; d3: Axial thickness of the second lens L2; d4: Axial distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3; d5: Axial thickness of the third lens L3; d6: Axial distance from the image-side surface of the third lens L3 to the object-side surface of the fourth lens L4; d7: Axial thickness of the fourth lens L4; d8: Axial distance from the image-side surface of the fourth lens L4 to the object-side surface of the fifth lens L5; d9: Axial thickness of the fifth lens L5; d10: Axial distance from the image-side surface of the fifth lens L5 to the object-side surface of the optical filter GF; d11: Axial thickness of the optical filter GF; d12: Axial distance from the image-side surface of the optical filter GF to the image plane SI; nd: Refractive index of the d-line; nd1: Refractive index of the d-line of the first prism P1; nd2: Refractive index of the d-line of the first lens L1; nd3: Refractive index of the d-line of the second lens L2; nd4: Refractive index of the d-line of the third lens L3; nd5: Refractive index of the d-line of the fourth lens L4; nd6: Refractive index of the d-line of the fifth lens L5; ndg: Refractive index of the d-line of the optical filter GF; vd: Abbe number; vd1: Abbe number of the first prism P1; vd2: Abbe number of the first lens L1; vd3: Abbe number of the second lens L2;vd4: Abbe number of the third lens L3; vd5: Abbe number of the fourth lens L4; vd6: Abbe number of the fifth lens L5; vdg: Abbe number of the optical filter GF; FOV: Field of view; FNO: Aperture number.
[0089] Table 3 shows the aspherical data of each lens in the camera optical lens 10 of the first embodiment of the present invention.
[0090] Table 3 Aspherical data of camera optical lens 10
[0091] For convenience, the aspherical surfaces of each lens surface are as shown in formula (1). However, the embodiments of the present invention are 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 +A 16r 16 +A18r 18 +A20r 20 (1)
[0092] Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, and A20 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).
[0093] Figures 2 and 3 show schematic diagrams of magnification chromatic aberration and axial aberration after light with wavelengths of 650.0 nm, 610.0 nm, 555.0 nm, 510.0 nm, 470.0 nm, and 430.0 nm passes through the imaging optical lens 10 of the first embodiment, respectively. Figure 4 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555.0 nm passes through the imaging 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.
[0094] Table 16, 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.
[0095] As shown in Table 16, the first embodiment satisfies all the conditional expressions.
[0096] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 10 in the first state is 7.252 mm, the full field of view image height IH is 3.594 mm, and the field of view angle FOV in the diagonal direction is 27.88°, which meets the requirements of long focal length, high magnification, and miniaturization, and has excellent optical characteristics.
[0097] Second Implementation Method
[0098] The second embodiment is basically the same as the first embodiment, and the symbols have the same meanings as the first embodiment. The structure of the camera optical lens 20 in the second embodiment is shown in Figure 5. The camera optical lens 20 shown in Figure 5 is in the first state. Only the differences are listed below.
[0099] Unlike the first embodiment, in this embodiment, the image-side surface of the first prism P1 is planar at the paraxial position; the fifth lens L5 has positive refractive power.
[0100] Table 4 shows the design data of the camera optical lens 20 according to the second embodiment of the present invention.
[0101] Table 4 Design data for camera optical lens 20
[0102] Where d1 = “dp1-01” + “dp1-02”, “dp1-01” = 4.550mm, “dp1-02” = 4.150mm.
[0103] Table 5 shows the relevant optical parameters of the camera lens 20 according to the second embodiment of the present invention in the first state (infinity focus state) and the second state (macro focus state).
[0104] Table 5. Relevant optical parameters of camera lenses under 20 different focusing states.
[0105] Table 6 shows the aspherical data of each lens in the camera optical lens 20 of the second embodiment of the present invention.
[0106] Table 6 Aspherical data for camera optical lenses 20
[0107] Figures 6 and 7 show schematic diagrams of magnification chromatic aberration and axial aberration after light with wavelengths of 650.0 nm, 610.0 nm, 555.0 nm, 510.0 nm, 470.0 nm, and 430.0 nm passes through the imaging optical lens 20 of the second embodiment, respectively. Figure 8 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555.0 nm passes through the imaging 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.
[0108] As shown in Table 16, the second embodiment satisfies all the conditional expressions.
[0109] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 20 in the first state is 7.245mm, the full field of view image height IH is 3.594mm, and the diagonal field of view FOV is 27.86°, which meets the requirements of long focal length, high magnification, and miniaturization, and has excellent optical characteristics.
[0110] Third Implementation Method
[0111] The third embodiment is basically the same as the first embodiment, and the symbols have the same meaning as the first embodiment. The structure of the camera optical lens 30 in the third embodiment is shown in Figure 9. The camera optical lens 30 shown in Figure 9 is in the first state. Only the differences are listed below.
[0112] Unlike the first embodiment, in this embodiment, the image-side surface of the third lens L3 is convex at the paraxial position, and the fifth lens L5 has positive refractive power.
[0113] Table 7 shows the design data of the camera optical lens 30 according to the third embodiment of the present invention.
[0114] Table 7 Design data for camera optical lens 30
[0115] Where d1 = “dp1-01” + “dp1-02”, “dp1-01” = 4.475mm, “dp1-02” = 4.225mm.
[0116] Table 8 shows the relevant optical parameters of the camera lens 30 according to the third embodiment of the present invention in the first state (infinity focus state) and the second state (macro focus state).
[0117] Table 8. Relevant optical parameters of camera lenses under 30 different focusing states.
[0118] Table 9 shows the aspherical data of each lens in the camera optical lens 30 of the third embodiment of the present invention.
[0119] Table 9 Aspherical data for camera optical lenses 30
[0120] Figures 10 and 11 show schematic diagrams of magnification chromatic aberration and axial aberration after light with wavelengths of 650.0 nm, 610.0 nm, 555.0 nm, 510.0 nm, 470.0 nm, and 430.0 nm passes through the imaging optical lens 30 of the third embodiment, respectively. Figure 12 shows schematic diagrams of field curvature and distortion after light with a wavelength of 555.0 nm passes through the imaging 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.
[0121] As shown in Table 16, the third embodiment satisfies all the conditional expressions.
[0122] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 30 is 7.249 mm, the full field of view image height IH is 3.594 mm, and the diagonal field of view FOV is 27.88°, which meets the requirements of long focal length, high magnification, and miniaturization, and has excellent optical characteristics.
[0123] Fourth Implementation Method
[0124] The fourth embodiment is basically the same as the first embodiment, and the symbols have the same meaning as the first embodiment. The structure of the camera optical lens 40 in the fourth embodiment is shown in Figure 13. The camera optical lens 40 shown in Figure 13 is in the first state. Only the differences are listed below.
[0125] Unlike the first embodiment, in this embodiment, the object-side surface of the third lens L3 is convex at the near-axis.
[0126] Table 10 shows the design data of the camera optical lens 40 according to the fourth embodiment of the present invention.
[0127] Table 10 Design data for camera optical lens 40
[0128] Where d1 = “dp1-01” + “dp1-02”, “dp1-01” = 4.550mm, “dp1-02” = 4.150mm.
[0129] Table 11 shows the relevant optical parameters of the camera lens 40 according to the fourth embodiment of the present invention in the first state (infinity focus state) and the second state (macro focus state).
[0130] Table 11 Relevant optical parameters of camera lenses under different focusing states.
[0131] Table 12 shows the aspherical data of each lens in the camera optical lens 40 of the fourth embodiment of the present invention.
[0132] Table 12 Aspherical data for camera optical lenses 40
[0133] Figures 14 and 15 show schematic diagrams of magnification chromatic aberration and axial aberration after light with wavelengths of 650.0 nm, 610.0 nm, 555.0 nm, 510.0 nm, 470.0 nm, and 430.0 nm passes through the imaging 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 555.0 nm passes through the imaging 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.
[0134] As shown in Table 16, the fourth embodiment satisfies all the conditional expressions.
[0135] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 40 is 7.249 mm, the full field of view image height IH is 3.594 mm, and the diagonal field of view FOV is 27.88°, which meets the requirements of long focal length, high magnification, and miniaturization, and has excellent optical characteristics.
[0136] Fifth Implementation Method
[0137] The fifth embodiment is basically the same as the first embodiment, and the symbols have the same meaning as the first embodiment. The structure of the camera optical lens 50 in the fifth embodiment is shown in Figure 17. The camera optical lens 50 shown in Figure 17 is in the first state. Only the differences are listed below.
[0138] Unlike the first embodiment, in this embodiment, the image-side surface of the third lens L3 is convex at the paraxial position.
[0139] Table 13 shows the design data of the camera optical lens 50 according to the fifth embodiment of the present invention.
[0140] Table 13 Design data for camera optical lens 50
[0141] Where d1 = “dp1-01” + “dp1-02”, “dp1-01” = 4.465mm, “dp1-02” = 4.235mm.
[0142] Table 14 shows the relevant optical parameters of the camera lens 50 according to the fifth embodiment of the present invention in the first state (infinity focus state) and the second state (macro focus state).
[0143] Table 14 Relevant optical parameters of camera lenses under 50 different focusing states
[0144] Table 15 shows the aspherical data of each lens in the camera optical lens 50 of the fifth embodiment of the present invention.
[0145] Table 15 Aspherical data for camera optical lenses 50
[0146] Figures 18 and 19 show schematic diagrams of magnification chromatic aberration and axial aberration after light with wavelengths of 650.0 nm, 610.0 nm, 555.0 nm, 510.0 nm, 470.0 nm, and 430.0 nm passes through the imaging 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 555.0 nm passes through the imaging 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.
[0147] As shown in Table 16, the fifth embodiment satisfies all the conditional expressions.
[0148] In this embodiment, the entrance pupil diameter ENPD of the camera optical lens 50 is 7.252mm, the full field of view image height IH is 3.594mm, and the diagonal field of view FOV is 27.90°, which meets the requirements of long focal length, high magnification, and miniaturization, and has excellent optical characteristics.
[0149] Table 16 shows the values corresponding to various numerical values and the parameters specified in the conditional expressions in each implementation method.
[0150] Those skilled in the art will understand that the above embodiments are specific implementations of the present invention, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of the present invention.
Claims
1. A camera optical lens characterized in that, The camera optical lens is composed of a first prism with positive refractive power, a first lens with negative refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power and a fifth lens arranged in sequence from the object side to the image side; a reflecting surface is arranged between the object side surface and the image side surface of the first prism; the first lens, the second lens, the third lens, the fourth lens and the fifth lens constitute a lens assembly which is arranged in a manner capable of moving along the optical axis of the camera optical lens for adjustment, so that the camera optical lens switches between a first state and a second state, wherein the focal length of the camera optical lens in the first state is the maximum, and the focal length of the camera optical lens in the second state is the minimum; The focal length of the camera optical lens in the first state is fA, the image height of the camera optical lens is IH, the distance between the most object side lens surface and the most image side lens surface of the camera optical lens on the optical axis in the first state is Lp, the radius of curvature of the object side surface of the first prism is Rp1, the radius of curvature of the image side surface of the first prism is Rp2, the radius of curvature of the object side surface of the fifth lens is R9, the radius of curvature of the image side surface of the fifth lens is R10, and the total optical length of the camera optical lens is TTL, and the following relationships are satisfied: 1.90≤fA*IH / TTL≤2.20; 0.25≤Lp / TTL≤0.41; 0.00≤Rp1 / Rp2≤1.11; 3.00≤(R9+R10) / (R9-R10)≤30.
20.
2. The camera optical lens according to claim 1, wherein, The on-axis thicknesses of the first lens, the second lens, the third lens, the fourth lens and the fifth lens are d1, d3, d5, d7 and d9 respectively, and the following relationship is satisfied: 2.40≤(d1+d3+d5) / (d7+d9)≤ 3.
00.
3. The camera optical lens according to claim 1, wherein, The object side surface of the first prism is convex at the near axis, the focal length of the first prism is fp1, the sum of the on-axis distance from the object side surface of the first prism to the reflecting surface and the on-axis distance from the reflecting surface to the image side surface of the first prism is dp1, and the following relationships are satisfied: 3.22≤fp1 / fA≤7.98; 0.322≤dp1 / TTL≤0.
363.
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 image side surface of the first lens is concave at the near 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 on-axis thickness of the first lens is d1, and the following relationships are satisfied: -0.80≤f1 / fA≤-0.57; 2.83≤(R1+R2) / (R1-R2)≤3 48; 0.029≤d1 / TTL≤0.
060.
5. The camera optical lens according to claim 1, characterized in that, The object side surface of the second lens is convex at the paraxial region, the image side surface of the second lens is convex at the paraxial region, 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, and the on-axis thickness of the second lens is d3, and the following relations are satisfied: 0.34≤f2 / fA≤0.41; -0.96≤(R3+R4) / (R3-R4)≤-0.67; 0.067≤d3 / TTL≤0.
084.
6. The camera optical lens according to claim 1, characterized in that, The focal length of the third lens is f3, 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 on-axis thickness of the third lens is d5, and the following relations are satisfied: -15.12≤f3 / fA≤-0.86; -1.74≤(R5+R6) / (R5-R6)≤2.02; 0.048≤d5 / TTL≤0.
078.
7. The camera optical lens according to claim 1, wherein, The object side surface of the fourth lens is convex at the paraxial region, the image side surface of the fourth lens is concave at the paraxial region, the focal length of the fourth lens is f4, the curvature radius of the object side surface of the fourth lens is R7, the curvature radius of the image side surface of the fourth lens is R8, and the on-axis thickness of the fourth lens is d7, and the following relations are satisfied: 1.09≤f4 / fA≤2.50; -10.76≤(R7+R8) / (R7-R8)≤-2.02; 0.037≤d7 / TTL≤0.
042.
8. The camera optical lens according to claim 1, characterized in that, 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 curvature radius of the object side surface of the fifth lens is R9, the curvature radius of the image side surface of the fifth lens is R10, and the on-axis thickness of the fifth lens is d9, and the following relations are satisfied: -8.59≤f5 / fA≤494.45; 0.027≤d9 / TTL≤0.
051.
9. The camera optical lens according to claim 1, characterized in that, The first prism is made of glass.