Infrared optical short-wave infrared lens

Abstract

The utility model discloses an infrared optical short-wave infrared lens which comprises a lens barrel, a first lens, a second lens and a third lens which are sequentially arranged on the inner wall of the lens barrel from an object plane to an image plane along an optical axis, and a heat absorption cavity is formed in the inner wall of the lens barrel. Through cooperation of the lens barrel, the first lens, the second lens, the third lens, the heat absorption cavity, the heat absorption ring, the cooling fins and the heat conduction port, the heat absorption cavity and the heat absorption ring can be used for heat absorption of the temperature rise of the lens, heat dissipation processing is carried out through the cooling fins, and then heat can be conducted to the cooling fins through the heat conduction pipe. Therefore, the cooling fins can integrally and synchronously dissipate heat, the heat dissipation performance of the lens can be improved, heat conduction can be performed among the cooling fins, the heat dissipation uniformity can be improved, the heat dissipation effect can be improved, the imaging quality can be improved, and the outdoor environment adaptability can be enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of infrared optical short-wave infrared lenses, in particular to an infrared optical short-wave infrared lens. Background Art

[0002] An infrared telescope is a device that uses infrared light emitted or reflected by a scene to image and display it. Since all warm objects radiate infrared light, infrared telescopes can be used not only during the day but also in the darkness of the night, capturing clear images through infrared light emitted by the scene.

[0003] At present, the existing infrared lenses have the advantages of good anti-interference performance, long effective distance at night, and strong ability to penetrate smoke and haze. However, the materials used in the existing infrared lenses are affected by their own temperature rise, and the refractive index of the optical material will change with the change of temperature. Therefore, how to achieve infrared optical short-wave infrared lenses with better imaging quality while enhancing their adaptability to outdoor environments is a problem that needs to be solved urgently. After searching, Chinese patent application No. 202222695160.5 discloses an infrared optical lens, which includes a lens barrel and a shell. The lens barrel is located in the shell, and a first lens, a second lens and a third lens are installed in the lens barrel. A plurality of heat dissipation ports are opened in the lens barrel, and a plurality of infrared lamps are installed on the peripheral side of the lens barrel. The peripheral side of the lens barrel is rotated with a plurality of heat sinks, and an air outlet is opened in the shell. In the present invention, a heat dissipation port is opened in the lens barrel, an air outlet is opened in the outer shell, and heat dissipation is performed by installing a heat sink, which can reduce the influence of the heat generated by the infrared lamp during long-term use on the imaging effect of the lens, thereby improving the imaging effect of the lens. Infrared lamps are installed on the peripheral side of the lens barrel, and imaging can be performed by reflecting the light emitted by the infrared lamp, so that a longer distance can be illuminated at night, and the lens has a strong ability to penetrate smoke and haze.

[0004] Although the above patent can reduce the impact of the heat generated by the infrared lamp during long-term use on the imaging effect of the lens, thereby improving the imaging effect of the lens, in actual use, the patent causes the heat sink to dissipate heat as an independent individual, resulting in uneven heat conduction, thereby affecting the heat dissipation effect, and in turn affecting the imaging quality of the lens.

[0005] Therefore, it is necessary to modify the infrared optical lens in the above patent to effectively prevent the heat sink from dissipating heat as independent individuals, resulting in uneven heat conduction, which in turn affects the heat dissipation effect and the imaging quality of the lens. Utility Model Content

[0006] In order to solve the problems raised in the above-mentioned background technology, the purpose of the present invention is to provide an infrared optical short-wave infrared lens, which has the ability to improve the heat dissipation performance of the lens, enable mutual heat conduction between the heat sinks, thereby improving the heat dissipation uniformity, and then improving the heat dissipation effect, and then improving the imaging quality, thereby enhancing the adaptability to outdoor environments.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an infrared optical short-wave infrared lens, comprising a lens barrel, an inner wall of the lens barrel having a first lens, a second lens, and a third lens arranged in sequence along the optical axis from the object plane to the image plane, the inner wall of the lens barrel being provided with a heat absorption cavity, and the position of the heat absorption cavity being located between the second lens and the third lens, the inner wall of the heat absorption cavity being provided with a heat absorption ring, the outer side of the heat absorption ring being fixedly connected to a plurality of heat sinks, and the plurality of heat sinks being evenly arranged in a ring shape with the lens barrel as the center, the inner wall of the heat absorption cavity being provided with a plurality of heat conduction ports, and the plurality of heat conduction ports being respectively in a one-to-one correspondence with and clamped with the plurality of heat sinks, the surface of the heat sink being symmetrically provided with heat conduction holes, and the interiors of two of the heat conduction holes being fixedly connected to a heat conduction pipe.

[0008] As a preferred embodiment of the present invention, a protective cover is fixedly connected to the outer surface of the lens barrel, a heat dissipation port is opened on the surface of the protective cover, and the heat dissipation port is located outside the heat sink.

[0009] As a preferred embodiment of the present invention, the inner wall of the heat dissipation port is rotatably connected to a plurality of rotating shafts, and the plurality of rotating shafts are evenly arranged in a ring shape with the lens barrel as the center, and a protective roller is fixedly connected to the surface of the rotating shaft.

[0010] As a preferred embodiment of the present invention, the surface of the heat-absorbing ring is fixedly connected with heat-conducting silica gel, and the heat-conducting silica gel is in contact with the heat-absorbing cavity.

[0011] As a preferred embodiment of the present invention, the first lens is a meniscus-shaped negative lens with negative refractive power, the second lens and the third lens are both meniscus-shaped positive lenses with positive refractive power, and heat is eliminated between the first lens, the second lens, and the third lens through an athermal optical design method with complementary thermal properties.

[0012] As a preferred embodiment of the present invention, the heat absorbing ring is respectively integrated with a plurality of heat sinks, and the heat absorbing ring and the heat sinks are both made of a composite material of graphite and copper.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. The utility model cooperates with the lens barrel, the first lens, the second lens, the third lens, the heat absorption cavity, the heat absorption ring, the heat sink and the heat conduction port to absorb the heat of the lens itself by using the heat absorption cavity and the heat absorption ring, and dissipate the heat through the heat sink. Then, the heat pipe is used to conduct the heat to each heat sink, so that the heat sink as a whole can dissipate heat synchronously, which can improve the heat dissipation performance of the lens, and mutual heat conduction can be carried out between the heat sinks, so as to improve the heat dissipation uniformity, thereby improving the heat dissipation effect, thereby improving the imaging quality, and thus enhancing the adaptability to outdoor environments.

[0015] 2. The utility model can protect the surface of the lens barrel by providing a protective cover and a heat dissipation port, and can provide a vent on the surface of the heat sink, thereby facilitating heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a partial cross-sectional perspective schematic diagram of the structure of the utility model;

[0018] Figure 3 It is a partial cross-sectional perspective diagram of the lens barrel of the utility model;

[0019] Figure 4 This is a three-dimensional schematic diagram of the coordinated use of the heat absorbing ring, heat sink and heat conducting pipe of the utility model.

[0020] In the figure: 1. Lens barrel; 2. First lens; 3. Second lens; 4. Third lens; 5. Heat absorption chamber; 6. Heat absorption ring; 7. Heat sink; 8. Heat conduction port; 9. Heat conduction pipe; 10. Protective cover; 11. Heat dissipation port; 12. Rotating shaft; 13. Protective roller; 14. Thermal conductive silicone. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] like Figures 1 to 4As shown, the utility model provides an infrared optical short-wave infrared lens, including a lens barrel 1, an inner wall of the lens barrel 1 having a first lens 2, a second lens 3, and a third lens 4 arranged in sequence along the optical axis from the object plane to the image plane, a heat absorption cavity 5 is opened on the inner wall of the lens barrel 1, and the heat absorption cavity 5 is located between the second lens 3 and the third lens 4, a heat absorption ring 6 is provided on the inner wall of the heat absorption cavity 5, a plurality of heat sinks 7 are fixedly connected to the outer side of the heat absorption ring 6, and the plurality of heat sinks 7 are evenly arranged in a ring shape with the lens barrel 1 as the center, a plurality of heat conduction ports 8 are opened on the inner wall of the heat absorption cavity 5, and the plurality of heat conduction ports 8 are respectively in a one-to-one correspondence with the plurality of heat sinks 7 and are clamped therewith, the surface of the heat sink 7 is symmetrically provided with heat conduction holes, and the interiors of the two heat conduction holes are fixedly connected to heat conduction pipes 9.

[0023] refer to Figure 1 and Figure 2 A protective cover 10 is fixedly connected to the outer surface of the lens barrel 1 , and a heat dissipation port 11 is opened on the surface of the protective cover 10 , and the heat dissipation port 11 is located on the outer side of the heat sink 7 .

[0024] As a technical optimization solution of the present invention, by providing the protective cover 10 and the heat dissipation opening 11, a vent can be provided on the surface of the heat sink 7, thereby facilitating heat dissipation.

[0025] refer to Figure 1 and Figure 2 The inner wall of the heat dissipation port 11 is rotatably connected to a plurality of rotating shafts 12 , and the plurality of rotating shafts 12 are evenly arranged in a ring shape with the lens barrel 1 as the center, and a protective roller 13 is fixedly connected to the surface of the rotating shaft 12 .

[0026] As a technical optimization solution of the present invention, the setting of the rotating shaft 12 and the protective roller 13 can avoid the problem of the heat sink 7 being directly exposed to the outside and being easily damaged, and the curved surface of the protective roller 13 can be used to unload external forces, thereby improving its protective performance.

[0027] refer to Figure 4 The surface of the heat-absorbing ring 6 is fixedly connected with a heat-conducting silicone rubber 14 , and the heat-conducting silicone rubber 14 is in contact with the heat-absorbing cavity 5 .

[0028] As a technical optimization solution of the present invention, the provision of the thermally conductive silica gel 14 can, on the one hand, make the heat absorption cavity 5 and the heat absorption ring 6 fit more firmly, and on the other hand, improve the thermal conductivity of the heat absorption ring 6.

[0029] refer to Figure 2 The first lens 2 is a meniscus-shaped negative lens with negative refractive power, the second lens 3 and the third lens 4 are both meniscus-shaped positive lenses with positive refractive power, and the first lens 2, the second lens 3, and the third lens 4 are all designed to eliminate heat through an athermal optical design method with complementary thermal properties.

[0030] As a technical optimization solution of the present invention, by configuring the first lens 2 as a meniscus-shaped negative lens with negative refractive power, and the second lens 3 and the third lens 4 as meniscus-shaped positive lenses with positive refractive power, the total length of the first lens 2, the second lens 3 and the third lens 4 can be reasonably controlled, while ensuring a sufficiently large aperture number to facilitate receiving more light, enhance the clarity and contrast of the lens imaging, effectively control the direction of light, reduce system aberrations, and improve imaging quality, and then use the athermal optical design method to eliminate the thermal difference between the first lens 2, the second lens 3 and the third lens 4.

[0031] refer to Figure 4 The heat absorbing ring 6 is integrated with a plurality of heat sinks 7, and the heat absorbing ring 6 and the heat sink 7 are both made of a composite material of graphite and copper.

[0032] As a technical optimization solution of the present invention, the heat absorption ring 6 is integrated with several heat sinks 7, so that the appearance of the heat absorption ring 6 and the heat sink 7 is that there are no unnecessary gaps except for the heat conduction holes, thereby improving the thermal conductivity efficiency. Then, the heat absorption ring 6 and the heat sink 7 are prepared by a composite material of graphite and copper, which can combine the characteristics of copper and graphite, and have the high thermal conductivity of copper while taking into account the adhesion and local strain related characteristics of graphite.

[0033] The working principle and use process of the present invention are as follows: when using the infrared optical short-wave infrared lens, the first lens 2, the second lens 3, and the third lens 4 can make the infrared optical short-wave infrared lens image more clearly, and ensure a sufficiently large aperture number to receive more light, enhance the clarity and contrast of the lens imaging, effectively control the direction of light, reduce system aberration, and improve the imaging quality. During use, the first lens 2, the second lens 3, and the third lens 4 are used to eliminate the thermal difference through the athermal optical design method with complementary thermal properties. At this time, the heat can be absorbed by the heat absorbing ring 6 and conducted 14 to each heat sink 7 through the heat conductive silica gel for Heat dissipation: At this time, the heat pipe 9 can be used to disperse the heat to each heat sink 7, so that the heat sink 7 can dissipate heat synchronously as a whole, which can improve the heat dissipation performance of the lens and enable mutual heat conduction between the heat sinks 7, thereby improving the heat dissipation uniformity, thereby improving the heat dissipation effect, and thereby improving the imaging quality. Then, the protective cover 10 can be used to protect the lens barrel 1, and the rotating shaft 12 and the protective roller 13 can be used to avoid the heat sink 7 being directly exposed to the outside, which may cause it to be easily damaged. The curved surface of the protective roller 13 can be used to unload external forces, thereby improving its protection performance, thereby enhancing the adaptability of the infrared optical short-wave infrared lens to outdoor environments.

[0034] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An infrared optical short-wave infrared lens, comprising a lens barrel (1), characterized in that: The inner wall of the lens barrel (1) is provided with a first lens (2), a second lens (3), and a third lens (4) arranged in sequence along the optical axis from the object plane to the image plane. The inner wall of the lens barrel (1) is provided with a heat absorption cavity (5), and the heat absorption cavity (5) is located between the second lens (3) and the third lens (4). The inner wall of the heat absorption cavity (5) is provided with a heat absorption ring (6). The outer side of the heat absorption ring (6) is fixedly connected to a plurality of heat sinks (7), and the plurality of heat sinks (7) are evenly arranged in a ring shape with the lens barrel (1) as the center. The inner wall of the heat absorption cavity (5) is provided with a plurality of heat conduction ports (8), and the plurality of heat conduction ports (8) are respectively in a one-to-one correspondence with the plurality of heat sinks (7) and are clamped therewith. The surface of the heat sink (7) is symmetrically provided with heat conduction holes, and the interiors of two of the heat conduction holes are fixedly connected to heat conduction pipes (9).

2. The infrared optical short-wave infrared lens according to claim 1, characterized in that: A protective sleeve (10) is fixedly connected to the outer surface of the lens barrel (1), and a heat dissipation port (11) is provided on the surface of the protective sleeve (10), and the heat dissipation port (11) is located outside the heat sink (7).

3. The infrared optical short-wave infrared lens according to claim 2, characterized in that: The inner wall of the heat dissipation port (11) is rotatably connected to a plurality of rotating shafts (12), and the plurality of rotating shafts (12) are evenly arranged in a ring shape with the lens barrel (1) as the center, and a protective roller (13) is fixedly connected to the surface of the rotating shaft (12).

4. The infrared optical short-wave infrared lens according to claim 1, characterized in that: The surface of the heat-absorbing ring (6) is fixedly connected with heat-conducting silica gel (14), and the heat-conducting silica gel (14) is in contact with the heat-absorbing cavity (5).

5. The infrared optical short-wave infrared lens according to claim 1, characterized in that: The first lens (2) is a meniscus-shaped negative lens with negative refractive power, the second lens (3) and the third lens (4) are both meniscus-shaped positive lenses with positive refractive power, and heat is eliminated among the first lens (2), the second lens (3) and the third lens (4) by using an athermal optical design method with complementary thermal properties.

6. The infrared optical short-wave infrared lens according to claim 1, characterized in that: The heat absorbing ring (6) is respectively integrated with a plurality of heat sinks (7), and the heat absorbing ring (6) and the heat sinks (7) are both made of a composite material of graphite and copper.

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