Visible light lens with 10-degree field of view for unmanned aerial vehicle
By designing a 10° field-of-view visible light lens for drones and employing a specific lens combination and filter, the problem of large imaging distortion in drones in existing technologies has been solved, achieving efficient and high-definition imaging.
Patent Information
- Application Number
- CN202323491752.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-21
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2033-12-21
AI Technical Summary
Existing aerial mapping lenses struggle to achieve consistent low-distortion imaging under complex weather conditions, failing to meet the imaging needs of UAVs in various fields.
Design a 10° field-of-view visible light lens for UAVs, employing a combination of lenses with specific materials and structures, including plano-convex lenses, plano-concave lenses, biconcave lenses, biconvex lenses, negative meniscus lenses, etc., and filtering out non-visible light bands through filters to achieve high imaging transfer function and low distortion.
It achieves high-definition aerial imaging with a 10° field of view, high imaging transfer function and low distortion, meeting the imaging needs of UAVs under complex weather conditions.
Smart Images
Figure CN223796744U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of optical lens technology, specifically relating to a 10° field-of-view visible light lens for drones. Background Technology
[0002] Unmanned aerial vehicles (UAVs), also known as drones, are unmanned aircraft controlled by radio remote control equipment and onboard program control devices. They have a wide range of applications in fields such as aerial photography, agriculture, plant protection, miniature selfies, express delivery, disaster relief, wildlife observation, infectious disease monitoring, surveying, news reporting, power line inspection, disaster relief, film and television shooting, and creating romance.
[0003] Drones typically operate in complex weather conditions and require consistent imaging with low distortion, but the optical design of existing aerial mapping lenses often fails to meet practical needs. Utility Model Content
[0004] In view of this, the purpose of this utility model is to provide a 10° field-of-view visible light lens for UAVs. This visible light lens has a simple structure, a fixed field of view of 10°, a high imaging transfer function, and low distortion.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] The UAV 10° field-of-view visible light lens of the present invention includes a plano-convex lens, a plano-concave lens, a first biconcave lens, a first biconvex lens, a second biconvex lens, a third biconvex lens, a first negative meniscus lens, a fourth biconvex lens, a fifth biconvex lens, a second negative meniscus lens, a window, and a filter arranged coaxially along the direction of light propagation; and an aperture is provided between the second and third biconvex lenses; the filter is used to filter out non-visible light wavelengths.
[0007] Furthermore, the plano-convex lens is made of H-ZBAF16, with a front surface radius of curvature of 99.45 mm and a thickness of 12.36 mm.
[0008] The plano-concave lens is made of H-LAF10LA, with front and rear surface radii of curvature of -128.24 mm and 393.72 mm, respectively. The distance between the plano-concave lens and the plano-convex lens is 4.32 mm, and the thickness of the plano-concave lens is 5.88 mm.
[0009] The first biconcave lens is made of H-F1 material, with radii of curvature of -85.20 mm and 133.91 mm on the front and rear surfaces, respectively. The distance between the first biconcave lens and the plano-concave lens is 6.60 mm, and the thickness of the first biconcave lens is 5.88 mm.
[0010] The first biconvex lens is made of H-FK61, and the radii of curvature of its front and rear surfaces are 163.83 mm and -93.36 mm, respectively. The distance between the first biconvex lens and the first biconcave lens is 5.52 mm, and the thickness of the first biconvex lens is 14.16 mm.
[0011] The material of the second biconvex lens is H-ZF62, and the radii of curvature of the front and rear surfaces are 1112.16 mm and -291.60 mm, respectively. The distance between the second biconvex lens and the first biconvex lens is 5.69 mm, and the thickness of the second biconvex lens is 10.08 mm.
[0012] The distance between the second biconvex lens and the aperture stop is 0.24 mm. The distance between the aperture stop and the third biconvex lens is 0.18 mm.
[0013] The material of the third biconvex lens is H-FK61, and the radii of curvature of the front and rear surfaces are 104.18 mm and -354.36 mm, respectively. The thickness of the third biconvex lens is 12.36 mm.
[0014] The first negative meniscus lens is made of H-ZLAF3, and the radii of curvature of its front and rear surfaces are 157.08 mm and 57.00 mm, respectively. The distance between the first negative meniscus lens and the third biconvex lens is 0.24 mm, and the thickness of the first negative meniscus lens is 6.48 mm.
[0015] The fourth biconvex lens is made of H-FK61, with radii of curvature of 60.696 mm and -176.29 mm on its front and rear surfaces, respectively. The distance between the fourth biconvex lens and the first negative meniscus lens is 7.49 mm, and the thickness of the fourth biconvex lens is 15.36 mm.
[0016] The fifth biconvex lens is made of H-FK61, with radii of curvature of 43.27 mm and 362.40 mm on its front and rear surfaces, respectively. The distance between the fifth and fourth biconvex lenses is 1.34 mm, and the thickness of the fifth biconvex lens is 14.16 mm.
[0017] The material of the second negative meniscus lens is H-LAK6A, and the radii of curvature of the front and rear surfaces are -1884.48mm and 33.23mm, respectively. The distance between the second negative meniscus lens and the fifth biconvex lens is 5.75mm, and the thickness of the second negative meniscus lens is 5.28mm.
[0018] The material of the window is H-K9L, the distance between the second negative meniscus lens and the window is 9.94mm, and the thickness of the window is 2.40mm.
[0019] The filter material is SILICA, the distance between the filter and the window is 18.00 mm, the filter thickness is 2.40 mm, and the distance between the filter and the image plane is 37.77 mm.
[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0021] The UAV lens of this invention has a 10° field of view and is simple in structure, with a high imaging transfer function and low distortion, enabling high-definition aerial imaging with a 10° field of view. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the structure of the 10° field-of-view visible light lens for UAVs according to this utility model;
[0024] In the figure, 1 is a plano-convex lens, 2 is a plano-concave lens, 3 is a first biconcave lens, 4 is a first biconvex lens, 5 is a second biconvex lens, 6 is a third biconvex lens, 7 is a first negative meniscus lens, 8 is a fourth biconvex lens, 9 is a fifth biconvex lens, 10 is a second negative meniscus lens, 11 is a window, 12 is a filter, and 13 is an aperture.
[0025] Figure 2 This is a full field-of-view diagram of the optical lens in Embodiment 1 of this utility model;
[0026] Figure 3 This is the maximum distortion diagram of the optical lens in Embodiment 1 of this utility model across the entire field of view. Detailed Implementation
[0027] To further understand this utility model, preferred embodiments of this utility model are described below. However, it should be understood that these descriptions are only for further illustrating the features and advantages of this utility model, and not for limiting the scope of the claims of this utility model.
[0028] like Figure 1As shown, the 10° field-of-view visible light lens for UAVs of this utility model includes a plano-convex lens 1, a plano-concave lens 2, a first biconcave lens 3, a first biconvex lens 4, a second biconvex lens 5, a third biconvex lens 6, a first negative meniscus lens 7, a fourth biconvex lens 8, a fifth biconvex lens 9, a second negative meniscus lens 10, a window 11, and a filter 12, which are coaxially arranged from front to back along the direction of light propagation. Among them, the plano-convex lens 1, the plano-concave lens 2, the first biconcave lens 3, the first biconvex lens 4, and the second biconvex lens 5 are set in front of the aperture 13, and the third biconvex lens 6, the first negative meniscus lens 7, the fourth biconvex lens 8, the fifth biconvex lens 9, the second negative meniscus lens 10, the window 11, and the filter 12 are set behind the aperture 13. After passing through plano-convex lens 1, plano-concave lens 2, first biconcave lens 3, first biconvex lens 4, and second biconvex lens 5, light enters the aperture 13, and then passes through the third biconvex lens 6, first negative meniscus lens 7, fourth biconvex lens 8, fifth biconvex lens 9, second negative meniscus lens 10, window 11, and filter 12 before being imaged on the image plane.
[0029] In the above technical solution, the plano-convex lens 1 is made of H-ZBAF16, with a front surface radius of curvature of 99.45 mm and a thickness of 12.36 mm. The plano-concave lens 2 is made of H-LAF10LA, with front and rear surface radii of curvature of -128.24 mm and 393.72 mm, respectively. The distance between the plano-concave lens 2 and the plano-convex lens 1 is 4.32 mm, and the thickness of the plano-concave lens 2 is 5.88 mm. The first biconcave lens 3 is made of H-F1, with front and rear surface radii of curvature of -85.2 mm and 133.91 mm, respectively. The distance between the first biconcave lens 3 and the plano-concave lens 2 is 6.60 mm, and the thickness of the first biconcave lens 3 is 5.88 mm. The first biconvex lens 4 is made of H-FK61, with radii of curvature of 163.83 mm and -93.36 mm on its front and rear surfaces, respectively. The distance between the first biconvex lens 4 and the first biconcave lens 3 is 5.52 mm, and the thickness of the first biconvex lens 4 is 14.16 mm. The second biconvex lens 5 is made of H-ZF62, with radii of curvature of 1112.16 mm and -291.60 mm on its front and rear surfaces, respectively. The distance between the second biconvex lens 5 and the first biconvex lens 4 is 5.69 mm, and the thickness of the second biconvex lens 5 is 10.08 mm. The distance between the second biconvex lens 5 and the aperture surface 13 is 0.24 mm. The distance between the aperture surface 13 and the third biconvex lens 6 is 0.18 mm.
[0030] The third biconvex lens 6 is made of H-FK61, with radii of curvature of 104.18 mm and -354.36 mm on its front and rear surfaces, respectively, and a thickness of 12.36 mm. The first negative meniscus lens 7 is made of H-ZLAF3, with radii of curvature of 157.08 mm and 57 mm on its front and rear surfaces, respectively. The distance between the first negative meniscus lens 7 and the third biconvex lens 6 is 0.24 mm, and the thickness of the first negative meniscus lens 7 is 6.48 mm. The fourth biconvex lens 8 is also made of H-FK61, with radii of curvature of 60.70 mm and -176.29 mm on its front and rear surfaces, respectively. The distance between the fourth biconvex lens 8 and the first negative meniscus lens 7 is 7.49 mm, and the thickness of the fourth biconvex lens 8 is 15.36 mm. The fifth biconvex lens 9 is made of H-FK61, with radii of curvature of 43.27 mm and 362.40 mm on its front and rear surfaces, respectively. The distance between the fifth biconvex lens 9 and the fourth biconvex lens 8 is 1.34 mm, and the thickness of the fifth biconvex lens 9 is 14.16 mm. The second negative meniscus lens 10 is made of H-LAK6A, with radii of curvature of -1884.48 mm and 33.23 mm on its front and rear surfaces, respectively. The distance between the second negative meniscus lens 10 and the fifth biconvex lens 9 is 5.75 mm, and the thickness of the second negative meniscus lens 10 is 5.28 mm. The window plate 11 is made of H-K9L, with a distance of 9.94 mm between the second negative meniscus lens 10 and the window plate 11, and a thickness of 2.40 mm. The filter 12 is made of SILICA. The distance between the filter 12 and the window 11 is 18.00 mm, the thickness of the filter 12 is 2.40 mm, and the distance between the filter 12 and the image plane is 37.77 mm. The filter 12 is used to filter out non-visible light.
[0031] The 10° field-of-view visible light lens for UAVs of this utility model may also include a lens barrel. The lens barrel is not particularly limited and can be used to fix the above-mentioned plano-convex lens 1, plano-concave lens 2, first biconcave lens 3, first biconvex lens 4, second biconvex lens 5, third biconvex lens 6, first negative meniscus lens 7, fourth biconvex lens 8, fifth biconvex lens 9, second negative meniscus lens 10, window 11 and filter 12.
[0032] The terms used in this utility model generally have the meanings commonly understood by those skilled in the art, unless otherwise stated.
[0033] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the embodiments.
[0034] In the following embodiments, various processes and methods not described in detail are conventional methods known in the art. Unless otherwise specified, the materials, reagents, apparatus, instruments, equipment, etc., used in the following embodiments are commercially available.
[0035] Example 1
[0036] The optical lens specifications are as follows: Size: Rear working distance: 70.466mm; Maximum aperture: Full field of view MTF > 0.60 @ 50 lp / mm; maximum distortion across the entire field of view < 1%.
[0037] Based on the above technical specifications, the parameters (radius, curvature, thickness, spacing, material, etc.) of each optical element of the designed optical lens are shown in Table 1.
[0038] Table 1. Parameters of each optical element in the optical lens of Example 1
[0039]
[0040]
[0041] Upon testing, the MTF of the optical lens in Example 1 across the entire field of view is as follows: Figure 2 As shown, the maximum distortion across the entire field of view is as follows: Figure 3 As shown, the optical lens of Example 1 exhibits a high imaging transfer function, low distortion, and good image clarity.
[0042] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the embodiments. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A 10° field-of-view visible light lens for unmanned aerial vehicles, characterized in that: The system includes a plano-convex lens (1), a plano-concave lens (2), a first biconcave lens (3), a first biconvex lens (4), a second biconvex lens (5), a third biconvex lens (6), a first negative meniscus lens (7), a fourth biconvex lens (8), a fifth biconvex lens (9), a second negative meniscus lens (10), a window (11), and a filter (12) arranged coaxially along the direction of light propagation; and an aperture (13) is provided between the second biconvex lens (5) and the third biconvex lens (6); the filter (12) is used to filter out non-visible light.
2. The 10° field-of-view visible light lens for UAVs according to claim 1, characterized in that, The plano-convex lens (1) is made of H-ZBAF16, with a front surface radius of curvature of 99.45 mm and a thickness of 12.36 mm. The plano-concave lens (2) is made of H-LAF10LA, and the radii of curvature of the front and rear surfaces are -128.24 mm and 393.72 mm, respectively. The distance between the plano-concave lens (2) and the plano-convex lens (1) is 4.32 mm, and the thickness of the plano-concave lens (2) is 5.88 mm. The material of the first biconcave lens (3) is H-F1, and the radii of curvature of the front and rear surfaces are -85.2mm and 133.91mm, respectively. The distance between the first biconcave lens (3) and the plano-concave lens (2) is 6.60mm, and the thickness of the first biconcave lens (3) is 5.88mm. The material of the first biconvex lens (4) is H-FK61, and the radii of curvature of the front and rear surfaces are 163.83 mm and -93.36 mm, respectively. The distance between the first biconvex lens (4) and the first biconcave lens (3) is 5.52 mm, and the thickness of the first biconvex lens (4) is 14.16 mm. The material of the second biconvex lens (5) is H-ZF62, and the radii of curvature of the front and rear surfaces are 1112.16 mm and -291.6 mm, respectively. The distance between the second biconvex lens (5) and the first biconvex lens (4) is 5.69 mm, and the thickness of the second biconvex lens (5) is 10.08 mm. The distance between the second biconvex lens (5) and the aperture plane (13) is 0.24 mm; the distance between the aperture plane (13) and the third biconvex lens (6) is 0.18 mm; The material of the third biconvex lens (6) is H-FK61, and the radii of curvature of the front and rear surfaces are 104.18 mm and -354.36 mm, respectively. The thickness of the third biconvex lens (6) is 12.36 mm. The material of the first negative meniscus lens (7) is H-ZLAF3, and the radii of curvature of the front and rear surfaces are 157.08 mm and 57.00 mm, respectively. The distance between the first negative meniscus lens (7) and the third biconvex lens (6) is 0.24 mm, and the thickness of the first negative meniscus lens (7) is 6.48 mm. The material of the fourth biconvex lens (8) is H-FK61, and the radii of curvature of the front and rear surfaces are 60.70 mm and -176.29 mm, respectively. The distance between the fourth biconvex lens (8) and the first negative meniscus lens (7) is 7.49 mm, and the thickness of the fourth biconvex lens (8) is 15.36 mm. The material of the fifth biconvex lens (9) is H-FK61, and the radii of curvature of the front and rear surfaces are 43.27 mm and 362.40 mm, respectively. The distance between the fifth biconvex lens (9) and the fourth biconvex lens (8) is 1.34 mm, and the thickness of the fifth biconvex lens (9) is 14.16 mm. The material of the second negative meniscus lens (10) is H-LAK6A, and the radii of curvature of the front and rear surfaces are -1884.48mm and 33.23mm, respectively. The distance between the second negative meniscus lens (10) and the fifth biconvex lens (9) is 5.75mm, and the thickness of the second negative meniscus lens (10) is 5.28mm. The material of the window (11) is H-K9L, the distance between the second negative meniscus lens (10) and the window (11) is 9.94mm, and the thickness of the window (11) is 2.40mm. The material of the filter (12) is SILICA. The distance between the filter (12) and the window (11) is 18.00 mm. The thickness of the filter (12) is 2.40 mm. The distance between the filter (12) and the image plane is 37.77 mm.