10-degree field-of-view near-infrared lens for unmanned aerial vehicle
By designing a 10° field-of-view near-infrared lens for UAVs and employing a specific lens combination and filter, the problem of poor imaging quality of UAVs under complex weather conditions was solved, achieving a high-efficiency imaging transfer function and low distortion, making it suitable for UAV remote sensing and reconnaissance missions.
Patent Information
- Application Number
- CN202323492444.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-21
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2033-12-21
AI Technical Summary
Existing UAV optical lenses produce poor imaging quality under complex weather conditions, making it difficult to achieve consistent imaging with low distortion, and thus failing to meet the needs of UAV remote sensing and reconnaissance.
Design a 10° field-of-view near-infrared lens for UAVs, employing a lens combination of specific materials and structures, including plano-convex lenses, biconvex lenses, biconcave lenses, and filters, to optimize imaging quality through aperture planes and filters.
It achieves high imaging transfer function and low distortion, resulting in good imaging clarity. It is suitable for precise imaging of small targets and for remote sensing and reconnaissance missions of UAVs in rain, snow, fog and low-light conditions.
Smart Images
Figure CN223808595U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to optical lens technical field, concretely relates to a 10 degree field of view near infrared lens for unmanned plane, and especially suitable for unmanned plane aviation remote sensing, surveying and mapping and reconnaissance field under the condition of rain, snow and fog and low illumination. BACKGROUND
[0002] The unmanned plane is short for "unmanned aerial vehicle", and is a non-personnel aircraft controlled by radio remote control equipment and self-provided program control device. The unmanned plane can be divided into military and civilian according to application field. In military aspect, the unmanned plane is divided into reconnaissance aircraft and target aircraft. In civilian aspect, unmanned plane + industry application is the real demand of unmanned plane. The application of unmanned plane in aerial photography, agriculture, plant protection, micro-selfie, express delivery, disaster rescue, observation of wild animals, monitoring of infectious diseases, surveying and mapping, news report, power patrol, disaster relief, film and television shooting, manufacturing romance and other fields greatly expands the purpose of unmanned plane itself.
[0003] The imaging quality of the on-board lens of the unmanned plane directly affects the remote sensing, surveying and mapping and reconnaissance effect of the unmanned plane. The unmanned plane generally works under complex climate conditions, and needs to realize consistent imaging with low distortion under poor environmental conditions, but the optical lens in the prior art often cannot meet the use requirement. CONTENT OF THE UTILITY MODEL
[0004] Therefore, the utility model aims at providing a 10 degree field of view near infrared lens for unmanned plane, and the near infrared lens has high imaging transfer function and low distortion.
[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0006] A 10 degree field of view near infrared lens for unmanned plane, comprising plano-convex lens, first double convex lens, first double concave lens, second double concave lens, plano-concave lens, second double convex lens, third double convex lens, third double concave lens, window sheet and optical filter, which are coaxially arranged in sequence along the propagation direction of light, and an aperture plane is arranged between the second double concave lens and the plano-concave lens.
[0007] The first double convex lens and the first double concave lens form a first double cemented lens.
[0008] The plano-concave lens and the second double convex lens form a second double cemented lens.
[0009] The curvature radius of the front surface of the plano-convex lens is 42.55mm, and the thickness is 10.62mm.
[0010] The optical filter is used for filtering non-near infrared band light.
[0011] Further, the material of the plano-concave lens is H-FK61.
[0012] Further, the first biconvex lens is made of H-FK61, the front and back surface curvature radii are -451.70mm and 41.87mm respectively, the interval between the first biconvex lens and the plano-concave lens is 2.12mm, and the thickness of the first biconvex lens is 10.62mm.
[0013] The first biconcave lens is made of H-LAK7, the front and back surface curvature radii are -55.32mm and 57.94mm respectively, and the thickness of the first biconcave lens is 2.83mm.
[0014] Further, the second biconcave lens is made of H-K9L, the front and back surface curvature radii are -56.24mm and 45.17mm respectively, the interval between the second biconcave lens and the first biconcave lens is 3.92mm, the thickness of the second biconcave lens is 3.30mm, and the interval between the second biconcave lens and the diaphragm surface is 3.12mm.
[0015] Further, the plano-concave lens is made of H-QF50, the back surface curvature radius is 942.03mm, the interval between the plano-concave lens and the diaphragm surface is 1.33mm, and the thickness of the plano-concave lens is 2.95mm.
[0016] The second biconvex lens is made of H-LAF1, the front and back surface curvature radii are 31.98mm and -41.45mm respectively, and the thickness of the second biconvex lens is 8.50mm.
[0017] Further, the third biconvex lens is made of H-ZLAF60, the front and back surface curvature radii are 36.59mm and -167.03mm respectively, the interval between the third biconvex lens and the second biconvex lens is 8.21mm, and the thickness of the third biconvex lens is 6.84mm.
[0018] Further, the third biconcave lens is made of H-ZLAF60, the front and back surface curvature radii are -62.92mm and 48.86mm respectively, the interval between the third biconcave lens and the third biconvex lens is 1.23mm, and the thickness of the third biconcave lens is 2.83mm.
[0019] Further, the window sheet is made of SILICON, the interval between the window sheet and the third biconcave lens is 4.51mm, and the thickness of the window sheet is 2.36mm.
[0020] Further, the filter is made of SILICON, the interval between the filter and the window sheet is 11.12mm, the thickness of the filter is 2.36mm, and the interval between the filter and the image surface is 8.78mm.
[0021] Compared with the prior art, the unmanned aerial vehicle 10° field of view near-infrared lens has the advantages that:
[0022] The unmanned aerial vehicle 10° field of view near-infrared lens has high imaging transfer function, low distortion, good imaging definition, and a fixed 10° field of view, and is suitable for small-range target accurate imaging. BRIEF DESCRIPTION OF DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.
[0024] Figure 1 It is a structural schematic view of the unmanned aerial vehicle 10° field of view near-infrared lens of the present application;
[0025] In the figure, 1 is a plano-convex lens, 2 is a first double convex lens, 3 is a first double concave lens, 4 is a second double concave lens, 5 is a plano-concave lens, 6 is a second double convex lens, 7 is a third double convex lens, 8 is a third double concave lens, 9 is a window sheet, 10 is a filter sheet, and 11 is an aperture plane.
[0026] Figure 2 It is a full field of view diagram of the optical lens in the embodiment 1 of the present application;
[0027] Figure 3 It is a full field of view maximum distortion diagram of the optical lens in the embodiment 1 of the present application. DETAILED DESCRIPTION
[0028] In order to further understand the present application, the preferred embodiments of the present application will be described below, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present application, and are not limitations of the claims of the present application.
[0029] For example, Figure 1The utility model discloses an unmanned aerial vehicle 10 degree field of view near infrared lens, including plano -convex lens 1, first double -convex lens 2, first double -concave lens 3 (first double -convex lens 2 and first double -concave lens 3 constitute first double cemented lens) that are coaxially arranged in order from front to rear along the propagation direction of light, second double -concave lens 4, plano -concave lens 5, second double -convex lens 6 (plano -concave lens 5 and second double -convex lens 6 constitute second double cemented lens), third double -convex lens 7, third double -concave lens 8, window piece 9 and filter 10, wherein plano -convex lens 1, first double -convex lens 2, first double -concave lens 3, second double -concave lens 4 are arranged before diaphragm surface 11, and plano -concave lens 5, second double -convex lens 6, third double -convex lens 7, third double -concave lens 8, window piece 9 and filter 10 are arranged behind diaphragm surface 11.Light is incident diaphragm surface 11 after passing plano -convex lens 1, first double -convex lens 2, first double -concave lens 3, second double -concave lens 4, then forms image on image surface after passing plano -concave lens 5, second double -convex lens 6, third double -convex lens 7, third double -concave lens 8, window piece 9 and filter 10.
[0030] In the above technical solution, the material of the plano-convex lens 1 is H-FK61, the radius of curvature of the front surface is 42.55mm, and the thickness is 10.62mm. The material of the first double-convex lens 2 is H-FK61, the radii of curvature of the front and back surfaces are-451.70mm and 41.87mm respectively, the distance between the first double-convex lens 2 and the plano-convex lens 1 is 2.12mm, and the thickness of the first double-convex lens 2 is 10.62mm. The material of the first double-concave lens 3 is H-LAK7, the radii of curvature of the front and back surfaces are-55.32mm and 57.94mm respectively, and the thickness of the first double-concave lens 3 is 2.83mm. The material of the second double-concave lens 4 is H-K9L, the radii of curvature of the front and back surfaces are-56.24mm and 45.17mm respectively, the distance between the second double-concave lens 4 and the first double-concave lens 3 is 3.92mm, the thickness of the second double-concave lens 4 is 3.30mm, and the distance between the second double-concave lens 4 and the diaphragm surface is 3.12mm. The material of the plano-concave lens 5 is H-QF50, the radius of curvature of the back surface is 942.03mm, the distance between the plano-concave lens 5 and the diaphragm surface 11 is 1.33mm, and the thickness of the plano-concave lens 5 is 2.95mm. The material of the second double-convex lens 6 is H-LAF1, the radii of curvature of the front and back surfaces are 31.98mm and-41.45mm respectively, and the thickness of the second double-convex lens 6 is 8.50mm. The material of the third double-convex lens 7 is H-ZLAF60, the radii of curvature of the front and back surfaces are 36.59mm and-167.03mm respectively, the distance between the third double-convex lens 7 and the second double-convex lens 6 is 8.21mm, and the thickness of the third double-convex lens 7 is 6.84mm. The material of the third double-concave lens 8 is H-ZLAF60, the radii of curvature of the front and back surfaces are-62.92mm and 48.86mm respectively, the distance between the third double-concave lens 8 and the third double-convex lens 7 is 1.23mm, and the thickness of the third double-concave lens 8 is 2.83mm. The material of the window sheet 9 is SILICON, the distance between the window sheet 9 and the third double-concave lens 8 is 4.51mm, and the thickness of the window sheet 9 is 2.36mm. The material of the filter 10 is SILICON, the distance between the filter 10 and the window sheet 9 is 11.12mm, the thickness of the filter 10 is 2.36mm, and the distance between the filter 10 and the image surface is 8.78mm. The filter 10 is used for filtering out non-near-infrared band light.
[0031] The 10° field of view near-infrared lens for unmanned aerial vehicles can further include a lens barrel, which is not specifically limited and can fix the plano-convex lens 1, the first double-convex lens 2, the first double-concave lens 3, the second double-concave lens 4, the plano-concave lens 5, the second double-convex lens 6, the third double-convex lens 7, the third double-concave lens 8, the window sheet 9 and the filter 10.
[0032] In the present application, the terms used have meanings generally understood by those of ordinary skill in the art, unless otherwise specified.
[0033] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below in conjunction with the embodiments.
[0034] In the following examples, various processes and methods that are not described in detail are conventional methods well known in the art. The materials, reagents, devices, instruments, equipment, etc. used in the following examples can be obtained from commercial sources unless otherwise specified.
[0035] Example 1
[0036] The technical index of the optical lens is: size: φ41.4x98.5; back working distance: 29.1mm; maximum light aperture: φ41.4mm; full field of view MTF>0.5@50lp / mm; maximum distortion of full field of view <1%.
[0037] Based on the above technical index, 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 of the optical lens of Example 1
[0039]
[0040] It is detected that the full field of view MTF of the optical lens of Example 1 is as shown in Figure 2 , and the maximum distortion of full field of view is as shown in Figure 3 . It can be seen that the imaging transfer function of the optical lens of Example 1 is high, the distortion is low, and the imaging clarity is good.
[0041] Obviously, the above examples are only examples for clearly illustrating, but not limit the examples. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all examples. The obvious changes or variations derived therefrom are still within the protection scope of the present application.
Claims
1. A 10° field of view near-infrared lens for a drone, characterized in that, The first double convex lens (2) and the first double concave lens (3) constitute a first double cemented lens. The first double convex lens (2) and the first double concave lens (3) constitute a first double cemented lens. The first double convex lens (2) and the first double concave lens (3) constitute a first double cemented lens. The radius of curvature of the front surface of the plano-convex lens (1) is 42.55mm, and the thickness is 10.62mm. The filter (10) is used to filter out non-near-infrared band light.
2. The 10° field of view near infrared lens for a drone according to claim 1, wherein, The material of the plano-convex lens (1) is H-FK61.
3. The 10° field of view near infrared lens for a drone according to claim 1, wherein, The material of the first double convex lens (2) is H-FK61, the radii of curvature of the front and rear surfaces are-451.70mm and 41.87mm respectively, the distance between the first double convex lens (2) and the plano-convex lens (1) is 2.12mm, and the thickness of the first double convex lens (2) is 10.62mm. The material of the first double concave lens (3) is H-LAK7, the radii of curvature of the front and rear surfaces are-55.32mm and 57.94mm respectively, and the thickness of the first double concave lens (3) is 2.83mm.
4. The 10° field of view near infrared lens for a drone according to claim 1, wherein, The material of the second double concave lens (4) is H-K9L, the radii of curvature of the front and rear surfaces are-56.24mm and 45.17mm respectively, the distance between the second double concave lens (4) and the first double concave lens (3) is 3.92mm, the thickness of the second double concave lens (4) is 3.30mm, and the distance between the second double concave lens (4) and the diaphragm surface (11) is 3.12mm.
5. The 10° FOV near-infrared lens for a UAV according to claim 1, wherein, The material of the plano-concave lens (5) is H-QF50, the radius of curvature of the rear surface is 343.57mm, the distance between the plano-concave lens (5) and the diaphragm surface (11) is 1.33mm, and the thickness of the plano-concave lens (5) is 2.95mm. The material of the second double convex lens (6) is H-LAF1, the radii of curvature of the front and rear surfaces are 31.98mm and-41.45mm respectively, and the thickness of the second double convex lens (6) is 8.50mm.
6. The 10° field of view near infrared lens for a drone according to claim 1, wherein, The material of the third double convex lens (7) is H-ZLAF60, the radii of curvature of the front and rear surfaces are 36.59mm and-167.03mm respectively, the distance between the third double convex lens (7) and the second double convex lens (6) is 8.21mm, and the thickness of the third double convex lens (7) is 6.84mm.
7. The 10° field of view near infrared lens for a drone according to claim 1, wherein, The material of the third double concave lens (8) is H-ZLAF60, the radii of curvature of the front and rear surfaces are-62.92mm and 48.86mm respectively, the distance between the third double concave lens (8) and the third double convex lens (7) is 1.23mm, and the thickness of the third double concave lens (8) is 2.83mm.
8. The 10° FOV near-infrared lens for a UAV according to claim 1, wherein, The material of the window sheet (9) is SILICON, the distance between the window sheet (9) and the third double-concave lens (8) is 4.51mm, and the thickness of the window sheet (9) is 2.36mm.
9. The 10° FOV near infrared lens for a UAV according to claim 1, wherein, The material of the filter (10) is SILICON, the distance between the filter (10) and the window sheet (9) is 11.12mm, the thickness of the filter (10) is 2.36mm, and the distance between the filter (10) and the image plane is 8.78mm.