Unmanned aerial vehicle detection lens
By designing twelve lenses and linearly moving the zoom group, a compact structure and high-quality imaging of the UAV detection lens were achieved, solving the problems of large weight, large size and high cost caused by a large number of lenses, expanding the monitoring distance and improving the imaging quality.
Patent Information
- Application Number
- CN202511485952.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-12-04
- Filing Date
- 2025-10-17
- Publication Date
- 2025-12-05
AI Technical Summary
Existing drone detection lenses have a large number of lenses, resulting in heavy weight, large size, high cost, and poor imaging quality, making it difficult to meet the performance requirements of diverse application scenarios.
It adopts a twelve-lens design, including a front fixed group, a zoom group, a compensation group, and a rear fixed group. The zoom function of the fixed-focus lens is achieved through the linear movement of the zoom group. Combined with the filter to filter stray light, the number of lenses is reduced and the image quality is improved.
It achieves a compact lens structure, reduces costs, expands monitoring distance, improves imaging quality and effect, and solves the problems of large lens weight, large size and high cost.
Smart Images
Figure CN121069598A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the optical technology field, and more particularly to a unmanned aerial vehicle detection lens. BACKGROUND
[0002] With the rapid development of science and technology, as a outstanding representative of modern technology, unmanned aerial vehicle technology has penetrated into all aspects of our life. From aerial photography to environmental monitoring, from agricultural plant protection to emergency rescue, unmanned aerial vehicle, with its unique flight capability and wide application scenarios, is gradually changing our way of work and life. And the unmanned aerial vehicle detection lens as an important part of the unmanned aerial vehicle system, its design level and performance directly affect the overall function and efficiency of the unmanned aerial vehicle.
[0003] As the "eyes" of the unmanned aerial vehicle, the design of the detection lens not only concerns the field of view and image clarity of the unmanned aerial vehicle, but also involves target recognition, environmental perception, data collection and other aspects. With the continuous expansion of application scenarios, the performance requirements of the unmanned aerial vehicle detection lens are becoming higher and higher. In order to achieve better imaging quality standard, most of the detection lenses on the market use more lenses, which leads to a series of problems such as heavy weight, large volume and high production cost. SUMMARY
[0004] In view of the deficiencies in the background art, the purpose of the present application is to provide a unmanned aerial vehicle detection lens.
[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:
[0006] A unmanned aerial vehicle detection lens, comprising a front fixed group, a zoom group, a compensation group and a rear fixed group arranged in order along an optical axis from an object side to an image side, the front fixed group comprising a first lens and a second lens with positive refractive power, the first lens comprising a first positive lens and a first negative lens, the front end of the first negative lens being glued to the rear end of the first positive lens; the zoom group comprising a third lens and a fourth lens with negative refractive power, the fourth lens comprising a second positive lens and a second negative lens, the front end of the second positive lens being glued to the rear end of the second negative lens; the compensation group comprising a fifth lens with positive refractive power, the fifth lens comprising a third positive lens and a third negative lens, the front end of the third negative lens being glued to the rear end of the third positive lens; the rear fixed group comprising a sixth lens and a seventh lens with positive refractive power, the sixth lens comprising a fourth negative lens and a fifth negative lens, the front end of the fifth negative lens being glued to the rear end of the fourth negative lens; the seventh lens comprising a fourth positive lens and a sixth negative lens, the front end of the sixth negative lens being glued to the rear end of the fourth positive lens; the positions of the front fixed group and the rear fixed group relative to the image plane are fixed, and the distance of the zoom group relative to the front fixed group on the optical axis is adjustable.
[0007] Further, the incident surface of the first negative lens is a concave surface, and the emergent surface is a convex surface; the incident surface of the first positive lens is a convex surface, and the emergent surface is a convex surface; the incident surface of the second negative lens is a concave surface, and the emergent surface is a concave surface; the incident surface of the second positive lens is a convex surface, and the emergent surface is a plane.
[0008] Further, the incident surface of the third negative lens is a concave surface, and the emergent surface is a convex surface; the incident surface of the third positive lens is a convex surface, and the emergent surface is a convex surface; the incident surface of the fourth negative lens is a convex surface, and the emergent surface is a concave surface; the incident surface of the fifth negative lens is a convex surface, and the emergent surface is a concave surface.
[0009] Further, the incident surface of the sixth negative lens is a concave surface, and the emergent surface is a plane; the incident surface of the fourth positive lens is a convex surface, and the emergent surface is a convex surface; the second lens is a lens with a convex incident surface and a plane emergent surface, and the third lens is a meniscus lens with a convex surface facing the object side and a concave surface facing the image side.
[0010] Further, the radius of curvature of the outer surface of the first positive lens is 86.208 mm, and the thickness is 8.028 mm; the radius of curvature of the outer surface of the first negative lens is -68.574 mm, the radius of curvature of the inner surface is -175.376, and the thickness is 0.978 mm; the radius of curvature of the outer surface of the second lens is 8128.739 mm, the radius of curvature of the inner surface is 51.447 mm, and the thickness is 5.044 mm; the radius of curvature of the outer surface of the third lens is 11.952 mm, the radius of curvature of the inner surface is 24.811 mm, and the thickness is 2.131 mm; the radius of curvature of the outer surface of the second positive lens is -50.603, and the thickness is 4.445 mm; the radius of curvature of the outer surface of the second negative lens is 18.091 mm, the radius of curvature of the inner surface is 147.801 mm, and the thickness is 3.186 mm; the radius of curvature of the outer surface of the third positive lens is 17.994 mm, and the thickness is 3.581 mm; the radius of curvature of the outer surface of the third negative lens is -15.814 m, the radius of curvature of the inner surface is -56.412 mm, and the thickness is 0.6 mm; the radius of curvature of the outer surface of the fourth negative lens is 11.016 mm, and the thickness is 4.476 mm; the radius of curvature of the outer surface of the fifth negative lens is 11.242 mm, the radius of curvature of the inner surface is 6.299 mm, and the thickness is 3.506 mm; the radius of curvature of the outer surface of the fourth positive lens is 8.281 mm, and the thickness is 2.431 mm; the radius of curvature of the outer surface of the sixth negative lens is 150.798 mm, the radius of curvature of the inner surface is -8.834 mm, and the thickness is 1.380 mm.
[0011] Further, the first positive lens is made of D-FK95 material; the first negative lens is made of H-ZLAF89L material; the second lens is made of H-LAK10 material; the third lens is made of H-ZLAF95 material; the second positive lens is made of H-ZLAF66 material; the second negative lens is made of H-ZF75A material; the third positive lens is made of H-ZPK7 material; the third negative lens is made of H-LAF4 material; the third negative lens is made of H-LAF52 material; the fifth negative lens is made of H-ZLAF95 material; the fourth positive lens is made of H-BAF3 material; and the sixth negative lens is made of H-ZF3 material.
[0012] Further, a filter is further included, and the filter is arranged on the image side.
[0013] Further, the zoom group is linearly moved along the opposite direction or the opposite direction on the optical axis, so that the lens is switched between the short-focus state, the medium-focus state and the long-focus state.
[0014] Further, when the zoom group is linearly moved along the opposite direction or the opposite direction on the optical axis, the interval between the second lens and the third lens is 0mm-29.499mm, the interval between the third lens and the second positive lens is 8.022mm, the interval between the second negative lens and the third positive lens is 0mm-55.445mm, the interval between the third negative lens and the fourth negative lens is 0.119mm-26.065mm, and the interval between the fifth negative lens and the fourth positive lens is 5.111mm.
[0015] Further, the three lens groups of the zoom group, the compensation group and the front group lens of the rear fixed group all need to be moved by a zoom cam.
[0016] The beneficial effects of the present application are:
[0017] 1. The unmanned aerial vehicle detection lens provided by the present application realizes zooming and continuous zooming of the fixed-focus lens by selecting and arranging twelve lenses, reduces the number of lenses, shortens the length of the lens, and makes the lens structure compact, the imaging effect good, and easy to adjust and assemble.
[0018] 2. The unmanned aerial vehicle detection lens provided by the present application realizes continuous zooming of the fixed-focus lens by twelve lenses, especially for large-aperture long-focus remote monitoring, which can solve the contradiction between the narrow field of view of the fixed-focus lens and the high price of the large-aperture long-focus zoom lens, and can not only expand the monitoring distance but also save the cost.
[0019] 3、The unmanned aerial vehicle detection lens provided by the application effectively filters stray light of non-working wave bands, reduces light noise, and improves imaging quality. BRIEF DESCRIPTION OF DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0021] Figure 1 A short-focus optical path diagram of the unmanned aerial vehicle detection lens of the application;
[0022] Figure 2 A medium-focus optical path diagram of the unmanned aerial vehicle detection lens of the application;
[0023] Figure 3 A long-focus optical path diagram of the unmanned aerial vehicle detection lens of the application;
[0024] Figure 4 A short-focus point column diagram of the unmanned aerial vehicle detection lens of the application;
[0025] Figure 5 A medium-focus point column diagram of the unmanned aerial vehicle detection lens of the application;
[0026] Figure 6 A long-focus point column diagram of the unmanned aerial vehicle detection lens of the application;
[0027] Figure 7 A short-focus MTF curve diagram of the unmanned aerial vehicle detection lens of the application;
[0028] Figure 8 A medium-focus MTF curve diagram of the unmanned aerial vehicle detection lens of the application;
[0029] Figure 9 A long-focus MTF curve diagram of the unmanned aerial vehicle detection lens of the application;
[0030] Figure 10 A short-focus distortion diagram of the unmanned aerial vehicle detection lens of the application;
[0031] Figure 11 A medium-focus distortion diagram of the unmanned aerial vehicle detection lens of the application;
[0032] Figure 12 A long-focus distortion diagram of the unmanned aerial vehicle detection lens of the application.
[0033] In the diagram, 101 is the first positive lens; 102 is the first negative lens; 103 is the second lens; 201 is the third lens; 202 is the second positive lens; 203 is the second negative lens; 301 is the third positive lens; 302 is the third negative lens; 401 is the fourth negative lens; 402 is the fifth negative lens; 403 is the fourth positive lens; and 404 is the sixth negative lens. Detailed Implementation
[0034] The following is combined with Figures 1-12 The present invention will be described in detail below.
[0035] A drone detection lens, such as Figures 1-3 As shown, the optical system includes a front fixed group, a zoom group, a compensation group, and a rear fixed group arranged sequentially from the object side to the image side along the optical axis. The front fixed group includes a first lens and a second lens 103 with positive optical power. The zoom group includes a third lens 201, a fourth lens, and a fifth lens with negative optical power. The compensation group includes a sixth lens with positive optical power. The rear fixed group includes a seventh lens with positive optical power. The positions of the front fixed group and the rear fixed group relative to the image plane are fixed, while the distance of the zoom group relative to the front fixed group on the optical axis is adjustable.
[0036] Table 1 shows the basic parameters of an infrared continuous zoom lens according to an exemplary embodiment of this application, wherein the units of radius of curvature, spacing and aperture are all millimeters (mm).
[0037] Table 1 - Parameter Indicators
[0038]
[0039] After optimization of the system structure and image quality, the final structure is shown in the figure below. The lens contains 0 aspherical lenses and 12 glass spherical lenses, with a total length of 117mm and a back focal length of 8.543mm. The ambient temperature is 20°C; the focal lengths of the short focal length, medium focal length, and telephoto focal lengths are 7.598mm, 38.769mm, and 76.984mm, respectively.
[0040] The lens operates in the wavelength range of 0.4μm to 0.8μm. The front fixed group has positive optical power, and the first and second lenses 103 provide sufficient working distance and balance the aberrations before the rear fixed group, reducing the correction burden on the rear fixed group. The zoom group has negative optical power, and the magnification is changed by moving the third lens 201 and the fourth lens. The compensation group, consisting of the fifth lens, has positive optical power and is used to compensate for image plane shift. The rear fixed group, consisting of the sixth and seventh lenses, has optically positive optical power.
[0041] In the embodiment, the first lens comprises a first positive lens 101 and a first negative lens 102, the front end of the first negative lens 102 is cemented to the rear end of the first positive lens 101, the incident surface of the first negative lens 102 is a concave surface, and the exit surface is a convex surface; the incident surface of the first positive lens 101 is a convex surface, and the exit surface is a convex surface.
[0042] In the embodiment, the fourth lens comprises a second positive lens 202 and a second negative lens 203, the front end of the second positive lens 202 is cemented to the rear end of the second negative lens 203, the incident surface of the second negative lens 203 is a concave surface, and the exit surface is a concave surface; the incident surface of the second positive lens 202 is a convex surface, and the exit surface is a plane.
[0043] In the embodiment, the fifth lens comprises a third positive lens 301 and a third negative lens 302, the front end of the third negative lens 302 is cemented to the rear end of the third positive lens 301, the incident surface of the third negative lens 302 is a concave surface, and the exit surface is a convex surface; the incident surface of the third positive lens 301 is a convex surface, and the exit surface is a convex surface.
[0044] Further, the sixth lens comprises a fourth negative lens 401 and a fifth negative lens 402, the front end of the fifth negative lens 402 is cemented to the rear end of the fourth negative lens 401, the incident surface of the fourth negative lens 401 is a convex surface, and the exit surface is a concave surface; the incident surface of the fifth negative lens 402 is a convex surface, and the exit surface is a concave surface.
[0045] In the embodiment, the seventh lens comprises a fourth positive lens 403 and a sixth negative lens 404, the front end of the sixth negative lens 404 is cemented to the rear end of the fourth positive lens 403, the incident surface of the sixth negative lens 404 is a concave surface, and the exit surface is a plane; the incident surface of the fourth positive lens 403 is a convex surface, and the exit surface is a convex surface. The working wavelength range is 0.4 μm~0.8 μm, the wavelength interval is relatively long, and the chromatic aberration is relatively large, so the first lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens adopt double-cemented lenses to reduce the chromatic aberration.
[0046] In the embodiment, the second lens 103 is a lens with a convex incident surface and a plane exit surface, and the third lens 201 is a meniscus lens with a convex surface facing the object side and a concave surface facing the image side.
[0047] In the embodiment, a filter is further included and arranged on the image side. The stray light not only affects the imaging quality and measurement accuracy, but also reduces the contrast and picture quality. Arranging the filter on the image side of the lens system can effectively filter out the stray light of the non-working waveband, so as to reduce the light noise and improve the imaging quality.
[0048] In the embodiment, the zoom group moves linearly along the opposite direction or the opposite direction on the optical axis, so that the infrared continuous zoom lens switches between the short-focus state, the medium-focus state and the long-focus state.
[0049] In the embodiment, the three lens groups of the variable magnification group, the compensation group and the front lens group of the rear fixed group all need to realize relative motion through the zoom cam.
[0050] The outer surface of the first positive lens 101 has a curvature radius of 86.208 mm and a thickness of 8.028 mm; the outer surface of the first negative lens 102 has a curvature radius of -68.574 mm, the inner surface has a curvature radius of -175.376, and the thickness is 0.978 mm; the outer surface of the second lens 103 has a curvature radius of 8128.739 mm, the inner surface has a curvature radius of 51.447 mm, and the thickness is 5.044 mm;
[0051] The outer surface of the third lens 201 has a curvature radius of 11.952 mm, the inner surface has a curvature radius of 24.811 mm, and the thickness is 2.131 mm; the outer surface of the second positive lens 202 has a curvature radius of -50.603, and the thickness is 4.445 mm; the outer surface of the second negative lens 203 has a curvature radius of 18.091 mm, the inner surface has a curvature radius of 147.801 mm, and the thickness is 3.186 mm;
[0052] The outer surface of the third positive lens 301 has a curvature radius of 17.994 mm, and the thickness is 3.581 mm; the outer surface of the third negative lens 302 has a curvature radius of -15.814 m, the inner surface has a curvature radius of -56.412 mm, and the thickness is 0.6 mm;
[0053] The outer surface of the fourth negative lens 401 has a curvature radius of 11.016 mm, and the thickness is 4.476 mm; the outer surface of the fifth negative lens 402 has a curvature radius of 11.242 mm, the inner surface has a curvature radius of 6.299 mm, and the thickness is 3.506 mm; the outer surface of the fourth positive lens 403 has a curvature radius of 8.281 mm, and the thickness is 2.431 mm; the outer surface of the sixth negative lens 404 has a curvature radius of 150.798 mm, the inner surface has a curvature radius of -8.834 mm, and the thickness is 1.380 mm.
[0054] The first positive lens 101 is made of D-FK95 material; the first negative lens 102 is made of H-ZLAF89L material; the second lens 103 is made of H-LAK10 material; the third lens 201 is made of H-ZLAF95 material; the second positive lens 202 is made of H-ZLAF66 material; the second negative lens 203 is made of H-ZF75A material; the third positive lens 301 is made of H-ZPK7 material; the third negative lens 302 is made of H-LAF4 material; the fourth negative lens 401 is made of H-LAF52 material; the fifth negative lens 402 is made of H-ZLAF95 material; the fourth positive lens 403 is made of H-BAF3 material; and the sixth negative lens 404 is made of H-ZF3 material.
[0055] Table 2: Short focus optical system parameter table
[0056]
[0057] As shown in Table 3, in the short focus state, the second lens 103 and the third lens 201 have a spacing of 0 mm, the third lens 201 and the second positive lens 202 have a spacing of 8.022 mm, the second negative lens 203 and the third positive lens 301 have a spacing of 55.445 mm, the third negative lens 302 and the fourth negative lens 401 have a spacing of 0.119 mm, and the fifth negative lens 402 and the fourth positive lens 403 have a spacing of 5.111 mm.
[0058] Table 3: Lens spacing (short focus) (mm)
[0059]
[0060] As shown in Table 4, in the medium focus state, the second lens 103 and the third lens 201 have a spacing of 25.687 mm, the third lens 201 and the second positive lens 202 have a spacing of 8.022 mm, the second negative lens 203 and the third positive lens 301 have a spacing of 16.867 mm, the third negative lens 302 and the fourth negative lens 401 have a spacing of 13.01 mm, and the fifth negative lens 402 and the fourth positive lens 403 have a spacing of 5.111 mm.
[0061] Table 4: Lens spacing (medium focus) (mm)
[0062]
[0063] As shown in Table 5, the distance between the second lens 103 and the third lens 201 is 29.499 mm, the distance between the third lens 201 and the second positive lens 202 is 8.022 mm, the distance between the second negative lens 203 and the third positive lens 301 is 8.022 mm, the distance between the third negative lens 302 and the fourth negative lens 401 is 26.065 mm, and the distance between the fifth negative lens 402 and the fourth positive lens 403 is 5.111 mm when the infrared continuous zoom lens is in the long-focus state.
[0064] Table 5: Lens distance (long focus) (mm)
[0065]
[0066] The above distance calculation is the distance between the center point of the rear side of the previous lens and the center point of the front side of the next lens.
[0067] As shown in Table 5, the distance between the second lens 103 and the third lens 201 is 29.499 mm, the distance between the third lens 201 and the second positive lens 202 is 8.022 mm, the distance between the second negative lens 203 and the third positive lens 301 is 8.022 mm, the distance between the third negative lens 302 and the fourth negative lens 401 is 26.065 mm, and the distance between the fifth negative lens 402 and the fourth positive lens 403 is 5.111 mm when the infrared continuous zoom lens is in the long-focus state. Figures 4-6 As shown in Table 5, the distance between the second lens 103 and the third lens 201 is 29.499 mm, the distance between the third lens 201 and the second positive lens 202 is 8.022 mm, the distance between the second negative lens 203 and the third positive lens 301 is 8.022 mm, the distance between the third negative lens 302 and the fourth negative lens 401 is 26.065 mm, and the distance between the fifth negative lens 402 and the fourth positive lens 403 is 5.111 mm when the infrared continuous zoom lens is in the long-focus state.
[0068] As shown in Table 5, the distance between the second lens 103 and the third lens 201 is 29.499 mm, the distance between the third lens 201 and the second positive lens 202 is 8.022 mm, the distance between the second negative lens 203 and the third positive lens 301 is 8.022 mm, the distance between the third negative lens 302 and the fourth negative lens 401 is 26.065 mm, and the distance between the fifth negative lens 402 and the fourth positive lens 403 is 5.111 mm when the infrared continuous zoom lens is in the long-focus state. Figures 7-9 As shown in Table 5, the distance between the second lens 103 and the third lens 201 is 29.499 mm, the distance between the third lens 201 and the second positive lens 202 is 8.022 mm, the distance between the second negative lens 203 and the third positive lens 301 is 8.022 mm, the distance between the third negative lens 302 and the fourth negative lens 401 is 26.065 mm, and the distance between the fifth negative lens 402 and the fourth positive lens 403 is 5.111 mm when the infrared continuous zoom lens is in the long-focus state.
[0069] Table 6: MTF values of different fields of view
[0070]
[0071] As shown in Table 5, the distance between the second lens 103 and the third lens 201 is 29.499 mm, the distance between the third lens 201 and the second positive lens 202 is 8.022 mm, the distance between the second negative lens 203 and the third positive lens 301 is 8.022 mm, the distance between the third negative lens 302 and the fourth negative lens 401 is 26.065 mm, and the distance between the fifth negative lens 402 and the fourth positive lens 403 is 5.111 mm when the infrared continuous zoom lens is in the long-focus state. Figures 10-12 As shown in Table 5, the distance between the second lens 103 and the third lens 201 is 29.499 mm, the distance between the third lens 201 and the second positive lens 202 is 8.022 mm, the distance between the second negative lens 203 and the third positive lens 301 is 8.022 mm, the distance between the third negative lens 302 and the fourth negative lens 401 is 26.065 mm, and the distance between the fifth negative lens 402 and the fourth positive lens 403 is 5.111 mm when the infrared continuous zoom lens is in the long-focus state.
[0072] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and principle of the present application shall be covered within the protection scope of the present application.
Claims
1. An unmanned aerial vehicle spotting lens, characterized in that, The zoom lens comprises, in order from the object side to the image side along the optical axis, a front fixed group, a zoom group, a compensation group and a rear fixed group, the front fixed group comprises a first lens and a second lens with positive refractive power, the first lens comprises a first positive lens and a first negative lens, the front end of the first negative lens is cemented to the rear end of the first positive lens; the zoom group comprises a third lens and a fourth lens with negative refractive power, the fourth lens comprises a second positive lens and a second negative lens, the front end of the second positive lens is cemented to the rear end of the second negative lens; the compensation group comprises a fifth lens with positive refractive power, the fifth lens comprises a third positive lens and a third negative lens, the front end of the third negative lens is cemented to the rear end of the third positive lens; the rear fixed group comprises a sixth lens and a seventh lens with positive refractive power, the sixth lens comprises a fourth negative lens and a fifth negative lens, the front end of the fifth negative lens is cemented to the rear end of the fourth negative lens; the seventh lens comprises a fourth positive lens and a sixth negative lens, the front end of the sixth negative lens is cemented to the rear end of the fourth positive lens; the front fixed group and the rear fixed group are fixed relative to the position of the image plane, and the distance of the zoom group relative to the front fixed group on the optical axis is adjustable.
2. The unmanned aerial probe lens of claim 1, wherein, The incident surface of the first negative lens is concave, and the emergent surface is convex; the incident surface of the first positive lens is convex, and the emergent surface is convex; the incident surface of the second negative lens is concave, and the emergent surface is concave; the incident surface of the second positive lens is convex, and the emergent surface is a plane.
3. The unmanned aerial probe lens of claim 1, wherein, The incident surface of the third negative lens is concave, and the emergent surface is convex; the incident surface of the third positive lens is convex, and the emergent surface is convex; the incident surface of the fourth negative lens is convex, and the emergent surface is concave; the incident surface of the fifth negative lens is convex, and the emergent surface is concave.
4. The unmanned aerial probe lens of claim 1, wherein, The incident surface of the sixth negative lens is concave, and the emergent surface is a plane; the incident surface of the fourth positive lens is convex, and the emergent surface is convex; the second lens is a lens with a convex incident surface and a plane emergent surface, and the third lens is a meniscus lens with a convex surface towards the object side and a concave surface towards the image side.
5. The unmanned aerial probe lens of claim 1, wherein, The first positive lens has a radius of curvature of 86.208 mm and a thickness of 8.028 mm; the first negative lens has a radius of curvature of -68.574 mm, a radius of curvature of the inner surface of -175.376, and a thickness of 0.978 mm; the second lens has a radius of curvature of 8128.739 mm, a radius of curvature of the inner surface of 51.447 mm, and a thickness of 5.044 mm; the third lens has a radius of curvature of 11.952 mm, a radius of curvature of the inner surface of 24.811 mm, and a thickness of 2.131 mm; the second positive lens has a radius of curvature of -50.603 mm and a thickness of 4.445 mm; the second negative lens has a radius of curvature of 18.091 mm, a radius of curvature of the inner surface of 147.801 mm, and a thickness of 3.186 mm; the third positive lens has a radius of curvature of 17.994 mm and a thickness of 3.581 mm; the third negative lens has a radius of curvature of -15.814 mm, a radius of curvature of the inner surface of -56.412 mm, and a thickness of 0.6 mm; the fourth negative lens has a radius of curvature of 11.016 mm and a thickness of 4.476 mm; the fifth negative lens has a radius of curvature of 11.242 mm, a radius of curvature of the inner surface of 6.299 mm, and a thickness of 3.506 mm; the fourth positive lens has a radius of curvature of 8.281 mm and a thickness of 2.431 mm; and the sixth negative lens has a radius of curvature of 150.798 mm, a radius of curvature of the inner surface of -8.834 mm, and a thickness of 1.380 mm.
6. The unmanned aerial probe lens of claim 1, wherein, The first positive lens is made of D-FK95 material; the first negative lens is made of H-ZLAF89L material; the second lens is made of H-LAK10 material; the third lens is made of H-ZLAF95 material; the second positive lens is made of H-ZLAF66 material; the second negative lens is made of H-ZF75A material; the third positive lens is made of H-ZPK7 material; the third negative lens is made of H-LAF4 material; the third negative lens is made of H-LAF52 material; the fifth negative lens is made of H-ZLAF95 material; the fourth positive lens is made of H-BAF3 material; and the sixth negative lens is made of H-ZF3 material.
7. The unmanned aerial probe lens of claim 1, wherein, A filter is further included and arranged on the image side.
8. The unmanned aerial probe lens of claim 1, wherein, The zoom group moves linearly along the optical axis in the opposite direction or the same direction to switch the lens between the short-focus state, the medium-focus state and the long-focus state.
9. The unmanned aerial probe lens of claim 1, wherein, When the variable magnification group moves in the same direction or in the opposite direction along the optical axis, the interval between the second lens and the third lens is 0mm-29.499mm, the interval between the third lens and the second positive lens is 8.022mm, the interval between the second negative lens and the third positive lens is 0mm-55.445mm, the interval between the third negative lens and the fourth negative lens is 0.119mm-26.065mm, and the interval between the fifth negative lens and the fourth positive lens is 5.111mm.
10. The unmanned aerial probe lens of claim 1, wherein, The three lens groups of the variable magnification group, the compensation group and the front lens group of the rear fixed group all need to realize relative movement through a zoom cam.