A high-speed optical system designed for S35
By designing a high-speed optical system with lens combinations and moving lens groups with specific parameters, the problems of high price and high manufacturing difficulty of large aperture lenses have been solved, achieving mass production and high imaging quality, suitable for imaging applications in extremely low light environments.
Patent Information
- Application Number
- CN202310084332.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-02-07
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2043-02-07
AI Technical Summary
Existing technologies have made large-aperture lenses expensive and require high precision in manufacturing and assembly, which makes mass production impossible and makes it difficult to guarantee image quality, especially with the extremely high focusing accuracy required at extremely large apertures.
A high-speed optical system for the S35 was designed, comprising an optical system consisting of multiple lenses. The lens combination uses lenses with specific refractive indices, thicknesses, and radii of curvature, and is combined with a moving lens group to achieve high-precision optical design.
It has achieved a high-speed optical system that can be mass-produced while ensuring low distortion and high resolution. It is suitable for imaging in extremely low light environments and solves the problems of long production cycle and high cost of large aperture lenses in existing technologies. It is applicable to fields such as darkroom biochemical reaction observation, solar panels and night vision devices.
Smart Images
Figure CN116068729B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of optical system technology, and in particular to a high-speed optical system designed for S35. Background Technology
[0002] Large-aperture optical systems can be used in very low-light environments. Ensuring image quality at maximum aperture presents a challenge not only in the design of the optical system but also in the precision required for lens manufacturing and assembly. Many high-quality large-aperture lenses are very expensive; the Leica 50mm f / 0.95 lens, for example, sells for as much as $10,000.
[0003] To ensure image quality at maximum aperture, the coordination of the internal optical and mechanical structures of large-aperture lenses is crucial. This places high demands on the precision manufacturing and assembly of optical glass components and mechanical parts. For example, the Leica 21mm f / 1.4 lens is assembled entirely by hand, resulting in extremely low production volume and, needless to say, significantly higher costs than lenses produced automatically. While designing high-speed lenses using optical design software is very difficult, it is still achievable with the help of increasingly powerful computer chips. However, ensuring the final product from design to high-quality optical lens is not as simple as it seems. Focusing alone is a problem, especially for telephoto lenses with large apertures. The larger the aperture, the shallower the depth of field. Because of the shallow depth of field, even slight camera shake or a slight shift in the focus ring can cause the focus to be lost. Especially at extremely large apertures like f / 0.85, the precision required for focusing during the movement of the last lens group is considerable. Therefore, this invention designs a focusing structure with a 270° rotation stroke.
[0004] This invention develops a high-speed optical system designed for the S35 while ensuring manufacturing precision, in order to solve the problems existing in the prior art. A search revealed no technical solutions that are the same as or similar to this invention. Summary of the Invention
[0005] The purpose of this invention is to provide a high-speed optical system designed for the S35, in order to solve the problem that existing optical systems with large apertures cannot be mass-produced due to their high cost and high manufacturing and assembly precision requirements.
[0006] The technical solution of the present invention is: a high-speed optical system designed for S35, comprising a first lens group, an aperture, a second lens group and a third lens group arranged along the optical axis from the object side to the image side, wherein the first lens group and the second lens group are fixed lens groups, and the third lens group is a movable lens group that can move along the optical axis.
[0007] The first lens group includes a first lens arranged sequentially from the object side to the image side along the optical axis, with a refractive index of 1.74 < nd < 1.79; a second lens with a refractive index of 1.61 < nd < 1.67; a third lens with a refractive index of 1.63 < nd < 1.65; a fourth lens with a refractive index of 1.81 < nd < 1.88; a fifth lens with a refractive index of 1.85 < nd < 1.91; and a sixth lens with a refractive index of 1.92 < nd < 1.98.
[0008] The second lens group is a cemented component, including a seventh lens arranged sequentially from the object side to the image side along the optical axis, with a refractive index of 1.64 < nd < 1.69; an eighth lens with a refractive index of 1.74 < nd < 1.79; and a ninth lens with a refractive index of 1.83 < nd < 1.92.
[0009] The third lens group includes a tenth lens with a refractive index of 1.83 < nd < 1.92.
[0010] Preferably, in the first lens group, wherein:
[0011] The first lens has a concave surface on both the object-side and image-side surfaces near the optical axis, with a center thickness of 2.85 mm to 3.15 mm; the second lens has a concave surface on both the object-side and image-side surfaces near the optical axis, with a center thickness of 5.64 mm to 6.23 mm; the third lens has a convex surface on both the object-side and image-side surfaces near the optical axis, with a center thickness of 7.27 mm to 8.03 mm; the fourth lens has a convex surface on both the object-side and image-side surfaces near the optical axis, with a center thickness of 9.86 mm to 10.89 mm; the fifth lens has a convex surface on both the object-side and image-side surfaces near the optical axis, with a center thickness of 10.43 mm to 11.53 mm; and the sixth lens has a convex surface on both the object-side and image-side surfaces near the optical axis, with a center thickness of 9.27 mm to 10.24 mm.
[0012] In the second lens group, wherein:
[0013] The seventh lens has a convex surface on both the object-side and image-side surfaces near the optical axis, with a center thickness of 12.34 mm to 13.64 mm; the eighth lens has a concave surface on both the object-side and image-side surfaces near the optical axis, with a center thickness of 8.27 mm to 9.14 mm; the ninth lens has a convex surface on both the object-side and image-side surfaces near the optical axis, with a center thickness of 8.94 mm to 9.88 mm.
[0014] The tenth lens has a convex surface on the object side near the optical axis and a concave surface on the image side near the optical axis, with a center thickness of 3.71mm to 4.10mm.
[0015] Preferably, in the first lens group, wherein:
[0016] The first lens has a chromatic aberration of 39.08–41.33, the second lens has a chromatic aberration of 57.60–63.66, the third lens has a chromatic aberration of 51.92–57.39, the fourth lens has a chromatic aberration of 38.06–42.85, the fifth lens has a chromatic aberration of 42.58–44.85, and the sixth lens has a chromatic aberration of 22.60–24.98.
[0017] In the second lens group, wherein:
[0018] The dispersion of the seventh lens is 53.02 to 58.60, the dispersion of the eighth lens is 25.28 to 27.94, and the dispersion of the ninth lens is 38.77 to 42.85.
[0019] In the third lens group, wherein:
[0020] The dispersion of the tenth lens is 38.77 to 42.85.
[0021] Preferably, in the first lens group, wherein:
[0022] The first lens has a concave surface radius of curvature of -174.87 mm to -158.23 mm near the object side and a concave surface radius of curvature of 61.25 mm to 67.68 mm near the image side; the second lens has a concave surface radius of curvature of -81.85 mm to -74.50 mm near the object side and a convex surface radius of curvature of -66.00 mm to -59.72 mm near the image side; the third lens has a convex surface radius of curvature of 168.48 mm to 186.22 mm near the object side and a convex surface radius of curvature of -259.32 mm to -234.62 mm near the image side. m; the radius of curvature of the convex surface of the fourth lens near the object side is 106.45mm to 117.65mm, and the radius of curvature of the convex surface near the image side is -148.44mm to -134.30mm; the radius of curvature of the convex surface of the fifth lens near the object side is 31.19mm to 34.47mm, and the radius of curvature of the concave surface near the image side is 40.50mm to 44.76mm; the radius of curvature of the convex surface of the sixth lens near the object side is 125.10mm to 138.26mm, and the radius of curvature of the concave surface near the image side is 18.10mm to 20.00mm;
[0023] In the second lens group, wherein:
[0024] The seventh lens has a radius of curvature of 451.60 mm to 499.13 mm on its convex surface near the object side and a radius of curvature of -18.35 mm to -6.47 mm on its convex surface near the image side; the eighth lens has a radius of curvature of -18.35 mm to -16.47 mm on its concave surface near the object side and a radius of curvature of 243.10 mm to 268.69 mm on its concave surface near the image side; the ninth lens has a radius of curvature of 243.10 mm to 268.69 mm on its convex surface near the object side and a radius of curvature of -34.29 mm to -31.10 mm on its convex surface near the image side.
[0025] In the third lens group, wherein:
[0026] The radius of curvature of the convex surface of the tenth lens near the object side is 29.90 mm to 33.15 mm, and the radius of curvature of the concave surface near the image side is 52.74 mm to 58.29 mm.
[0027] Preferably, the air gap between the first lens and the second lens is 10.15–12.80 mm, the air gap between the second lens and the third lens is 2.62–3.85 mm, the air gap between the third lens and the fourth lens is 0.035–0.155 mm, the air gap between the fourth lens and the fifth lens is 0.035–0.155 mm, the air gap between the fifth lens and the sixth lens is 3.25–4.86 mm, the air gap between the sixth lens and the seventh lens is 10.15–12.80 mm, and the air gap between the ninth lens and the tenth lens can vary from 0.110 to 3.5 mm.
[0028] Compared with the prior art, the advantages of the present invention are:
[0029] This invention relates to a high-speed optical system designed for the S35 sensor, specifically a 40mm / f0.85 high-speed lens optical system for S35 (24.6x13.8mm) sensor cameras. This system achieves mass production while maintaining low distortion and high resolution at full aperture, shortening the manufacturing cycle while meeting image quality requirements. It effectively solves the problems of long manufacturing cycles, high difficulty, and high cost associated with existing large-aperture lenses. It can be used for image capture and video surveillance in extremely low-light environments and has wide applications in darkroom biochemical reaction observation, solar panels, simulated space darkrooms, and special-requirement night vision devices. Attached Figure Description
[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0031] Figure 1This is a schematic diagram of the structure of a high-speed optical system designed for the S35 according to the present invention;
[0032] Figure 2 The MTF curve, dispersion diagram, and distortion diagram of a high-speed optical system designed for S35 according to the present invention at an aperture value of 0.85;
[0033] Figure 3 The MTF curve, dispersion diagram, and distortion diagram of a high-speed optical system designed for S35 according to the present invention at an aperture value of 1.4 are shown.
[0034] Figure 4 The MTF curve, dispersion diagram, and distortion diagram of a high-speed optical system designed for S35 according to the present invention at an aperture value of 2.8 are shown.
[0035] Figure 5 The MTF curve, dispersion diagram, and distortion diagram of a high-speed optical system designed for S35 according to the present invention at an aperture value of 5.6 are shown.
[0036] Figure 6 The MTF curve, dispersion diagram, and distortion diagram of a high-speed optical system designed for S35 according to the present invention are shown below when the aperture value is 11. Detailed Implementation
[0037] The present invention will be further described in detail below with reference to specific embodiments:
[0038] like Figure 1 As shown, a high-speed optical system designed for S35, used to match the 40mm / f0.85 high-speed lens optical system of S35 (24.6x13.8mm) sensor camera, includes a first lens group 1, an aperture, a second lens group 2 and a third lens group 3 arranged along the optical axis from the object side to the image side. The first lens group 1 and the second lens group 2 are fixed lens groups, and the third lens group 3 is a movable lens group that can move along the optical axis.
[0039] The first lens group 1 includes a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, and a sixth lens 16 arranged sequentially from the object side to the image side along the optical axis.
[0040] The first lens 11 has a concave surface on the object side near the optical axis, with an absolute value of the radius of curvature R1 of 158.23 mm to 174.87 mm, and a concave surface on the image side near the optical axis, with an absolute value of the radius of curvature R1' of 61.25 mm to 67.68 mm. The center thickness D1 is 2.85 mm to 3.15 mm, the refractive index is 1.74 < nd < 1.79, and the dispersion V1 is 39.08 to 41.33.
[0041] The preferred design parameters are:
[0042] R1 = 166.555 mm
[0043] R1' = 64.469 mm
[0044] D1 = 3mm
[0045] nd = 1.76
[0046] V1 = 41.14
[0047] The second lens 12 has a concave surface on the object side near the optical axis, with an absolute value of the radius of curvature R2 of 74.50 mm to 81.85 mm, and a convex surface on the image side near the optical axis, with an absolute value of the radius of curvature R2' of 59.72 mm to 66.00 mm. Its center thickness D2 is 5.64 mm to 6.23 mm. Its refractive index is 1.61 < nd < 1.67, and its dispersion V2 is 57.60 to 63.66.
[0048] The preferred design parameters are:
[0049] R2 = 77.949 mm
[0050] R2'=62.866mm
[0051] D2 = 5.94mm
[0052] nd = 1.64
[0053] V2 = 60.63
[0054] The third lens 13 has a convex surface on the object side near the optical axis, with a radius of curvature R3 of 168.48 mm to 186.22 mm, and a convex surface on the image side near the optical axis, with an absolute value of the radius of curvature R3' of 234.62 mm to 259.32 mm, a center thickness D3 of 7.27 mm to 8.03 mm, a refractive index of 1.63 < nd < 1.65, and a dispersion V3 of 51.92 to 57.39.
[0055] The preferred design parameters are:
[0056] R3 = 177.354 mm
[0057] R3' = 246.978 mm
[0058] D3 = 7.65mm
[0059] nd = 1.64
[0060] V3 = 54.66
[0061] The fourth lens 14 has a convex surface on the object side near the optical axis with a radius of curvature R4 of 106.45 mm to 117.65 mm, and a convex surface on the image side near the optical axis with an absolute value of the radius of curvature R4' of 134.30 mm to 148.44 mm. The center thickness D4 is 9.86 mm to 10.89 mm, the refractive index is 1.81 < nd < 1.88, and the dispersion V4 is 38.06 to 42.85.
[0062] The preferred design parameters are:
[0063] R4 = 112.055mm
[0064] R4' = 141.375 mm
[0065] D4 = 10.38mm
[0066] nd = 1.85
[0067] V4 = 40.81
[0068] The fifth lens 15 has a convex surface on the object side near the optical axis with a radius of curvature R5 of 31.19 mm to 34.47 mm, and a concave surface on the image side near the optical axis with an absolute value of the radius of curvature R5' of 40.50 mm to 44.76 mm. The center thickness D5 is 10.43 mm to 11.53 mm, the refractive index is 1.85 < nd < 1.91, and the dispersion V5 is 42.58 to 44.85.
[0069] The preferred design parameters are:
[0070] R5 = 32.835mm
[0071] R5' = 42.634 mm
[0072] D5 = 10.98mm
[0073] nd = 1.88
[0074] V5 = 42.72
[0075] The sixth lens 16 has a convex surface on the object side near the optical axis with a radius of curvature R6 of 125.10 mm to 138.26 mm, and a concave surface on the image side near the optical axis with a radius of curvature R6' of 18.10 mm to 20.00 mm. The center thickness D6 is 9.27 mm to 10.24 mm, the refractive index is 1.92 < nd < 1.98, and the dispersion V6 is 22.60 to 24.98.
[0076] The preferred design parameters are:
[0077] R6 = 131.685mm
[0078] R6' = 19.058 mm
[0079] D6 = 9.76mm
[0080] nd=1.95
[0081] V6 = 23.79
[0082] Regarding the second lens group 2, it includes a seventh lens 21, an eighth lens 22, and a ninth lens 23 arranged sequentially from the object side to the image side along the optical axis, and the seventh lens 21, the eighth lens 22, and the ninth lens 23 are cemented parts:
[0083] The seventh lens 21 has a convex surface on the object side near the optical axis, with a radius of curvature R7 of 451.60 mm to 499.13 mm. It also has a convex surface on the image side near the optical axis, with an absolute value of the radius of curvature R7' of 16.47 mm to 18.35 mm. The center thickness D7 is 12.34 mm to 13.64 mm, the refractive index is 1.64 < nd < 1.69, and the dispersion V7 is 53.02 to 58.60.
[0084] The preferred design parameters are:
[0085] R7 = 475.378mm
[0086] R7' = 17.477 mm
[0087] D7 = 12.99mm
[0088] nd = 1.67
[0089] V7 = 55.81
[0090] The eighth lens 22 has a concave surface on the object side near the optical axis, with an absolute value of the radius of curvature R8 of 16.47 mm to 18.35 mm. It also has a concave surface on the image side near the optical axis, with an absolute value of the radius of curvature R8' of 243.10 mm to 268.69 mm. Its center thickness D8 is 8.27 mm to 9.14 mm, its refractive index is 1.74 < nd < 1.79, and its dispersion V8 is 25.28 to 27.94.
[0091] The preferred design parameters are:
[0092] R8 = 17.48mm
[0093] R8' = 255.9mm
[0094] D8 = 8.71mm
[0095] nd = 1.76
[0096] V8 = 26.61
[0097] The ninth lens 23 has a convex surface on the object side near the optical axis, with a radius of curvature R9 of 243.10 mm to 268.69 mm, and a convex surface on the image side near the optical axis, with an absolute value of the radius of curvature R9' of 31.10 mm to 34.29 mm. The center thickness D9 is 8.94 mm to 9.88 mm, the refractive index is 1.83 < nd < 1.92, and the dispersion V9 is 38.77 to 42.85.
[0098] The preferred design parameters are:
[0099] R9 = 255.89mm
[0100] R9' = 32.66mm
[0101] D9 = 9.41mm
[0102] nd = 1.88
[0103] V9 = 40.81
[0104] Regarding the third lens group 3, which includes the tenth lens 31, it can move left and right along the optical axis:
[0105] The tenth lens 31 has a convex surface on the object side near the optical axis with a radius of curvature R10 of 29.90 mm to 33.15 mm, and a concave surface on the image side near the optical axis with an absolute value of the radius of curvature R10' of 52.74 mm to 58.29 mm. The center thickness D10 is 3.71 mm to 4.10 mm, the refractive index is 1.83 < nd < 1.92, and the dispersion V10 is 38.77 to 42.85.
[0106] The preferred design parameters are:
[0107] R10 = 31.575mm
[0108] R10' = 55.523mm
[0109] D10 = 3.9mm
[0110] nd = 1.88
[0111] V10 = 40.81
[0112] In this embodiment, the air gap between the first lens and the second lens is 10.15–12.80 mm, the air gap between the second lens and the third lens is 2.62–3.85 mm, the air gap between the third lens and the fourth lens is 0.035–0.155 mm, the air gap between the fourth lens and the fifth lens is 0.035–0.155 mm, the air gap between the fifth lens and the sixth lens is 3.25–4.86 mm, the air gap between the sixth lens and the seventh lens is 10.15–12.80 mm, and the air gap between the ninth lens and the tenth lens has a variable range of 0.110–3.5 mm.
[0113] Based on the selection of the above lens parameters, in the first lens group of the present invention, the air gaps from the object side to the image side are as follows: 11.36mm, 3.12mm, 0.097mm, 0.097mm, 3.95mm.
[0114] The air gap between the first lens group and the second lens group is 11.55 mm;
[0115] In the second lens group, since the second lens group is a cemented component, there is no air gap between the seventh lens, the eighth lens, and the ninth lens;
[0116] The air gap between the second and third lens groups is 2.45 mm, which is the air gap between the ninth and tenth lenses.
[0117] This invention primarily targets a 40mm / f0.85 high-speed lens for S35 (24.6x13.8mm) sensor cameras. The imaging performance of this optical system at different aperture values (0.85, 1.4, 2.8, 5.6, 11) is as follows: Figure 2-6 As shown, it can ensure low image distortion, maintain high resolution when the aperture is wide open, and can be used to achieve mass production. For the MTF curves corresponding to each aperture value, the larger the aperture value, the better the image quality.
[0118] The above embodiments are merely illustrative of the technical concept and features of the present invention, intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and should not be construed as limiting the scope of protection of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description, and thus all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention.
Claims
1. A high-speed optical system designed for S35, characterized in that: It includes a first lens group, an aperture, a second lens group, and a third lens group arranged along the optical axis from the object side to the image side. The first lens group and the second lens group are fixed lens groups, and the third lens group is a movable lens group that can move along the optical axis. The first lens group includes a first lens arranged sequentially from the object side to the image side along the optical axis, with a refractive index of 1.74 < nd < 1.79; a second lens with a refractive index of 1.61 < nd < 1.67; a third lens with a refractive index of 1.63 < nd < 1.65; a fourth lens with a refractive index of 1.81 < nd < 1.88; a fifth lens with a refractive index of 1.85 < nd < 1.91; and a sixth lens with a refractive index of 1.92 < nd < 1.
98. The second lens group is a cemented component, including a seventh lens arranged sequentially from the object side to the image side along the optical axis, with a refractive index of 1.64 < nd < 1.69; an eighth lens with a refractive index of 1.74 < nd < 1.79; and a ninth lens with a refractive index of 1.83 < nd < 1.
92. The third lens group includes a tenth lens with a refractive index of 1.83 < nd < 1.92; In the first lens group, wherein: The first lens has a concave surface radius of curvature of -174.87 mm to -158.23 mm near the object side and a concave surface radius of curvature of 61.25 mm to 67.68 mm near the image side; the second lens has a concave surface radius of curvature of -81.85 mm to -74.50 mm near the object side and a convex surface radius of curvature of -66.00 mm to -59.72 mm near the image side; the third lens has a convex surface radius of curvature of 168.48 mm to 186.22 mm near the object side and a convex surface radius of curvature of -259.32 mm to -234.62 mm near the image side. m; the radius of curvature of the convex surface of the fourth lens near the object side is 106.45mm to 117.65mm, and the radius of curvature of the convex surface near the image side is -148.44mm to -134.30mm; the radius of curvature of the convex surface of the fifth lens near the object side is 31.19mm to 34.47mm, and the radius of curvature of the concave surface near the image side is 40.50mm to 44.76mm; the radius of curvature of the convex surface of the sixth lens near the object side is 125.10mm to 138.26mm, and the radius of curvature of the concave surface near the image side is 18.10mm to 20.00mm; The seventh lens has a radius of curvature of 451.60 mm to 499.13 mm on its convex surface near the object side and a radius of curvature of -18.35 mm to -6.47 mm on its convex surface near the image side; the eighth lens has a radius of curvature of -18.35 mm to -16.47 mm on its concave surface near the object side and a radius of curvature of 243.10 mm to 268.69 mm on its concave surface near the image side; the ninth lens has a radius of curvature of 243.10 mm to 268.69 mm on its convex surface near the object side and a radius of curvature of -34.29 mm to -31.10 mm on its convex surface near the image side. The radius of curvature of the convex surface of the tenth lens near the object side is 29.90 mm to 33.15 mm, and the radius of curvature of the concave surface near the image side is 52.74 mm to 58.29 mm.
2. The high-speed optical system designed for S35 according to claim 1, characterized in that: In the first lens group, wherein: The first lens has a concave surface on both the object-side and image-side surfaces near the optical axis, with a center thickness of 2.85 mm to 3.15 mm; the second lens has a concave surface on both the object-side and image-side surfaces near the optical axis, with a center thickness of 5.64 mm to 6.23 mm; the third lens has a convex surface on both the object-side and image-side surfaces near the optical axis, with a center thickness of 7.27 mm to 8.03 mm; the fourth lens has a convex surface on both the object-side and image-side surfaces near the optical axis, with a center thickness of 9.86 mm to 10.89 mm; the fifth lens has a convex surface on both the object-side and image-side surfaces near the optical axis, with a center thickness of 10.43 mm to 11.53 mm; and the sixth lens has a convex surface on both the object-side and image-side surfaces near the optical axis, with a center thickness of 9.27 mm to 10.24 mm. In the second lens group, wherein: The seventh lens has a convex surface on both the object-side and image-side surfaces near the optical axis, with a center thickness of 12.34 mm to 13.64 mm; the eighth lens has a concave surface on both the object-side and image-side surfaces near the optical axis, with a center thickness of 8.27 mm to 9.14 mm; the ninth lens has a convex surface on both the object-side and image-side surfaces near the optical axis, with a center thickness of 8.94 mm to 9.88 mm. The tenth lens has a convex surface on the object side near the optical axis and a concave surface on the image side near the optical axis, with a center thickness of 3.71mm to 4.10mm.
3. A high-speed optical system designed for S35 according to claim 2, characterized in that: In the first lens group, wherein: The first lens has a chromatic aberration of 39.08–41.33, the second lens has a chromatic aberration of 57.60–63.66, the third lens has a chromatic aberration of 51.92–57.39, the fourth lens has a chromatic aberration of 38.06–42.85, the fifth lens has a chromatic aberration of 42.58–44.85, and the sixth lens has a chromatic aberration of 22.60–24.
98. The dispersion of the seventh lens is 53.02 to 58.60, the dispersion of the eighth lens is 25.28 to 27.94, and the dispersion of the ninth lens is 38.77 to 42.
85. In the third lens group, wherein: The dispersion of the tenth lens is 38.77 to 42.
85.
4. A high-speed optical system designed for S35 according to claim 2, characterized in that: The air gap between the first and second lenses is 10.15–12.80 mm, the air gap between the second and third lenses is 2.62–3.85 mm, the air gap between the third and fourth lenses is 0.035–0.155 mm, the air gap between the fourth and fifth lenses is 0.035–0.155 mm, the air gap between the fifth and sixth lenses is 3.25–4.86 mm, and the air gap between the sixth and seventh lenses is 10.15–12.80 mm; the air gap between the ninth and tenth lenses can vary from 0.110 to 3.5 mm.
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