Lens system, searchlight and unmanned aerial vehicle

Abstract

The utility model provides a lens system, a searchlight and an unmanned aerial vehicle. The lens system comprises a second lens and a first lens which are sequentially arranged in the light path direction. The first lens is an aspheric convex lens; the first surface of the first lens is a plane, and the second surface of the first lens is an aspheric surface; the diameter of the first surface of the first lens is 20-22 mm; the second lens is a plano-convex lens, the first surface of the second lens is a plane, and the second surface of the second lens is a regular spherical surface; the diameter of the first surface of the second lens is 13-15mm; the curvature radius of the spherical surface is 8 to 10 millimeters; the distance between the first lens and the second lens is 9 to 10 millimeters. According to the embodiment of the invention, through the design of the aspheric convex lens, the irradiation range of light rays is concentrated, and meanwhile, the irradiation distance is increased. The searchlighting device can be widely applied to the technical field of searchlighting of unmanned aerial vehicles.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicle searchlighting, in particular to a lens system, a searchlight and an unmanned aerial vehicle. Background Art

[0002] Drones can be used in a variety of fields, including aerial photography, agriculture, disaster relief, surveying and mapping, power inspections, and logistics. Understandably, during their use, drones inevitably encounter nighttime missions, requiring them to provide stable and clear lighting to successfully complete the mission. Conventional drone lighting systems, while offering a wide illumination range, often suffer from poor illumination effects and a short illumination distance, failing to meet user needs.

[0003] In summary, the problems existing in related technologies need to be solved urgently. Utility Model Content

[0004] The purpose of the present invention is to solve one of the technical problems existing in the related art to at least a certain extent.

[0005] To this end, an object of the embodiments of the present invention is to provide a lens system, a searchlight, and a drone with a concentrated illumination range and a long illumination distance, including:

[0006] The present invention provides a lens system comprising: a second lens and a first lens arranged in sequence along an optical path; the first lens is an aspheric convex lens; the first surface of the first lens is a plane, and the second surface of the first lens is an aspheric surface; the diameter of the first surface of the first lens is 20 to 22 mm; the second lens is a plano-convex lens, the first surface of the second lens is a plane, and the second surface of the second lens is a regular sphere; the diameter of the first surface of the second lens is 13 to 15 mm; the radius of curvature of the spherical surface is 8 to 10 mm; and the distance between the first lens and the second lens is 9 to 10 mm. The present invention concentrates the illumination range of light and increases the illumination distance through the design of the aspheric convex lens.

[0007] In addition, the lens system according to the above embodiment of the present invention may also have the following additional technical features:

[0008] Furthermore, in an embodiment of the present invention, the thickness of the first lens is 8 to 9 mm; the thickness of the second lens is 5 to 6 mm.

[0009] Furthermore, in one embodiment of the present invention, the thickness of the first surface of the first lens is 2 to 3 mm, and the thickness of the first surface of the second lens is 1 to 2 mm.

[0010] Furthermore, in an embodiment of the present invention, the refractive index of the first lens is 1.5 to 1.6, and the refractive index of the second lens is 1.6 to 1.7.

[0011] Furthermore, in one embodiment of the present invention, the Abbe coefficient of the first lens is 64 to 65, and the Abbe coefficient of the second lens is 55 to 56.

[0012] Furthermore, in one embodiment of the present invention, the focal length of the first lens is 14, and the focal length of the second lens is 11.

[0013] Furthermore, in one embodiment of the present invention, the material of the first lens is H-K9L, and the material of the second lens is H-ZK11.

[0014] Furthermore, in one embodiment of the present invention, the half beam angle of the lens system is 12 to 14 degrees; the full spot angle of the lens system is 20 to 21 degrees.

[0015] On the other hand, an embodiment of the present application provides a searchlight, comprising the lens system as described above.

[0016] On the other hand, an embodiment of the present application provides a drone, comprising the searchlight as described above.

[0017] The advantages and benefits of the present invention will be described in part in the following description, and will become apparent from the following description or learned through practice of the present invention:

[0018] A lens system disclosed in an embodiment of the present application includes: a second lens and a first lens arranged in sequence along an optical path; the first lens is an aspheric convex lens; the first surface of the first lens is a plane, and the second surface of the first lens is an aspheric surface; the diameter of the first surface of the first lens is 20 to 22 mm; the second lens is a plano-convex lens, the first surface of the second lens is a plane, and the second surface of the second lens is a regular sphere; the diameter of the first surface of the second lens is 13 to 15 mm; the radius of curvature of the spherical surface is 8 to 10 mm; and the distance between the first lens and the second lens is 9 to 10 mm. The embodiment of the present application, through the design of the aspheric convex lens, concentrates the illumination range of light and increases the illumination distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of an embodiment of the lens system provided in this application;

[0020] Figure 2 A schematic structural diagram of another embodiment of the lens system provided by the present application;

[0021] Figure 3 A simulation effect diagram of an embodiment of the lens system provided in this application;

[0022] Figure 4 This is a simulation effect diagram of another embodiment of the lens system provided in this application. DETAILED DESCRIPTION

[0023] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0024] In the description of the present invention, it should be understood that the terms "length", "up", "down", "front", "back", "left", "right", "top", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] Drones can be used in a variety of fields, including aerial photography, agriculture, disaster relief, surveying and mapping, power inspections, and logistics. Understandably, during their use, drones inevitably encounter nighttime missions, requiring them to provide stable and clear lighting to successfully complete the mission. Conventional drone lighting systems, while offering a wide illumination range, often suffer from poor illumination effects and a short illumination distance, failing to meet user needs.

[0027] Therefore, this application proposes a lens system, referring to Figure 1The structural diagram of the lens system shown in FIG. 1 is a detailed introduction to the lens system proposed in this application.

[0028] The lens system proposed in this application includes: a second lens and a first lens arranged in sequence along the optical path;

[0029] The first lens is an aspheric convex lens; the first surface of the first lens is a plane, and the second surface of the first lens is an aspheric surface; the diameter of the first surface of the first lens is 20 to 22 mm;

[0030] The second lens is a plano-convex lens, the first surface of the second lens is a plane, and the second surface of the second lens is a regular spherical surface; the diameter of the first surface of the second lens is 13 to 15 mm; and the radius of curvature of the spherical surface is 8 to 10 mm;

[0031] The distance between the first lens and the second lens is 9 to 10 mm.

[0032] In some possible implementations, the diameter of the first surface of the first lens is 21 mm; the diameter of the first surface of the second lens is 14 mm; the radius of curvature of the spherical surface is 8.35 mm; and the distance between the first lens and the second lens is 9.32 mm. Of course, the above are merely illustrative examples, and this application does not limit the specific parameters of the lenses.

[0033] Optionally, in the lens system proposed in the present application, the thickness of the first lens is 8 to 9 mm; the thickness of the second lens is 5 to 6 mm.

[0034] In some possible implementations, the thickness of the first lens is 8.794 mm; the thickness of the second lens is 5.26 mm.

[0035] Optionally, in the lens system proposed in the present application, the thickness of the first surface of the first lens is 2 to 3 mm, and the thickness of the first surface of the second lens is 1 to 2 mm.

[0036] In some possible implementations, the thickness of the first surface of the first lens is 2.17 mm, and the thickness of the first surface of the second lens is 1.48 mm.

[0037] Optionally, in the lens system proposed in the present application, the refractive index of the first lens is 1.5 to 1.6, and the refractive index of the second lens is 1.6 to 1.7.

[0038] In some possible implementations, the refractive index of the first lens is 1.5168, and the refractive index of the second lens is 1.6385.

[0039] Optionally, in the lens system proposed in the present application, the dispersion coefficient of the first lens is 64 to 65, and the dispersion coefficient of the second lens is 55 to 56.

[0040] In some possible implementations, the Abbe coefficient of the first lens is 64.212, and the Abbe coefficient of the second lens is 55.472.

[0041] Optionally, in the lens system proposed in this application, the focal length of the first lens is 14, and the focal length of the second lens is 11.

[0042] Optionally, in the lens system proposed in this application, the material of the first lens is H-K9L, and the material of the second lens is H-ZK11.

[0043] In some possible embodiments, H-K9L is a colorless optical glass widely used in visible and near-infrared optical devices. H-ZK11 is a type of lanthanide optical glass, specifically the H-ZK family. Lanthanide optical glasses include multiple series, such as H-LAF, H-ZF, and H-LAK, of which H-ZK is a subfamily. This glass material may have specific optical properties, such as refractive index and dispersion characteristics, that make it suitable for applications requiring specific optical properties.

[0044] Optionally, the lens system proposed in the present application has a half-beam angle of 12 to 14 degrees; and a full spot angle of 20 to 21 degrees.

[0045] In some possible implementations, the half-beam angle of the lens system is 13 degrees; and the full spot angle of the lens system is 20.40 degrees.

[0046] The lens system of the embodiment of the present application is described in detail below using a specific embodiment:

[0047] Reference Figure 2As shown in the figure, the schematic diagram of the lens system structure proposed in the embodiment of the present application, wherein the various parameters of the lens are shown in Table 1. This product is composed of two convex lenses, which has a better focusing effect and is conducive to the final light spot formation. The first lens L1 is an aspheric lens. The convex surface of the lens is not a standard spherical surface, but adopts an aspheric design. It can reduce the aberration and better improve the imaging quality, so that the light can be evenly focused in a larger range; the second lens L2 is a plano-convex lens. The convex surface is a regular spherical surface, which emits light from the light source and performs a preliminary converging effect. Due to the refractive effect of the lens, the light will be refracted on the convex surface of the lens and converge to the focus of the lens. The direction of light propagation is changed by Snell's Law, so that the angle is contracted and converged to the focus. The important point is that the shape and material properties of the aspheric convex lens determine that it can adjust the light from a larger divergence angle (150°) to a smaller divergence angle (20°). Such a design makes the illumination range of the relevant lighting more concentrated and the illumination distance farther.

[0048]

[0049] Table 1

[0050] The above lens is simulated, and the effect is as follows Figure 3 and Figure 4 As shown, the specific simulation results are shown in Table 2. It can be seen that the lens system proposed in the embodiment of the present application can achieve a more concentrated illumination range and a longer illumination distance.

[0051]

[0052]

[0053] Table 2

[0054] As can be seen from the above description, the lens system provided by the embodiment of the present application includes: a second lens and a first lens arranged in sequence along the optical path; the first lens is an aspheric convex lens; the first surface of the first lens is a plane, and the second surface of the first lens is an aspheric surface; the diameter of the first surface of the first lens is 20 to 22 mm; the second lens is a plano-convex lens, the first surface of the second lens is a plane, and the second surface of the second lens is a regular sphere; the diameter of the first surface of the second lens is 13 to 15 mm; the radius of curvature of the spherical surface is 8 to 10 mm; the distance between the first lens and the second lens is 9 to 10 mm. The embodiment of the present application uses the design of the aspheric convex lens to concentrate the illumination range of light and at the same time increase the illumination distance.

[0055] On the other hand, an embodiment of the present application provides a searchlight, comprising the lens system as described above.

[0056] On the other hand, an embodiment of the present application provides a drone, comprising the searchlight as described above.

[0057] It is understandable that the lens system provided in the embodiments of the present application can also be used in other devices or equipment that use lenses, and the present application does not limit the specific use equipment and scenarios of the lenses.

[0058] Throughout this specification, references to terms such as "one embodiment," "another embodiment," or "certain embodiments" indicate that a specific feature, structure, material, or characteristic described in conjunction with an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0059] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lens system, characterized in that: The lens system comprises: a second lens and a first lens arranged in sequence along the optical path direction; The first lens is an aspheric convex lens; the first surface of the first lens is a plane, and the second surface of the first lens is an aspheric surface; the diameter of the first surface of the first lens is 20 to 22 mm; The second lens is a plano-convex lens, the first surface of the second lens is a plane, and the second surface of the second lens is a regular spherical surface; the diameter of the first surface of the second lens is 13 to 15 mm; and the radius of curvature of the spherical surface is 8 to 10 mm; The distance between the first lens and the second lens is 9 to 10 mm.

2. A lens system according to claim 1, characterized in that: The thickness of the first lens is 8 to 9 mm; The thickness of the second lens is 5 to 6 mm.

3. The lens system according to claim 1, wherein: The thickness of the first surface of the first lens is 2 to 3 mm, and the thickness of the first surface of the second lens is 1 to 2 mm.

4. The lens system according to claim 1, wherein: The refractive index of the first lens is 1.5 to 1.6, and the refractive index of the second lens is 1.6 to 1.

7.

5. The lens system according to claim 1, wherein: The Abbe coefficient of the first lens is 64 to 65, and the Abbe coefficient of the second lens is 55 to 56.

6. The lens system according to claim 1, wherein: The focal length of the first lens is 14, and the focal length of the second lens is 11.

7. The lens system according to claim 1, wherein: The material of the first lens is H-K9L, and the material of the second lens is H-ZK11.

8. The lens system according to claim 1, wherein: The half beam angle of the lens system is 12 to 14 degrees; the full spot angle of the lens system is 20 to 21 degrees.

9. A searchlight, characterized in that: Comprising the lens system according to any one of claims 1 to 8.

10. A drone, characterized in that: Comprising the searchlight as claimed in claim 9.

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