A pollution-resistant structure for use in focusing telescopes

Abstract

This invention relates to the field of space science exploration technology, and provides a contamination prevention structure for a focusing telescope. The focusing telescope includes a focusing optical system and a gas-filled protection system. The focusing optical system includes a focusing lens and a detector housing. The gas-filled protection system has a gas inlet connected to the focusing lens and detector housing to fill them with protective gas. By setting up the gas-filled protection system and filling the focusing lens or detector housing with protective gas, direct contact between the focusing lens and detector and the external environment is isolated, thereby preventing contaminants (such as particulate and molecular contaminants) from adhering to critical components, avoiding contamination of the focusing lens and detector, ensuring the high cleanliness and good scientific performance of the telescope, and improving the stability and service life of the telescope.

Description

Technical Field

[0001] This invention relates to the field of space science exploration technology, and in particular to a contamination-proof structure for use in focusing telescopes. Background Technology

[0002] Optical instruments are very sensitive to contaminants, especially focusing telescopes, which have even stricter requirements for contamination control. Existing focusing telescopes are easily contaminated by particulate and molecular contaminants during operation, which can lead to a decrease in the optical parameters of the focusing telescope, a degradation in detector performance, or even damage, thus affecting the lifespan of the focusing telescope. Summary of the Invention

[0003] This invention provides a contamination-resistant telescope for use in focusing telescopes, which solves the problem that existing telescopes are easily contaminated and damaged.

[0004] A contamination-resistant structure for a focusing telescope according to an embodiment of the present invention includes:

[0005] A focusing optical system, wherein the focusing optical system is provided with a focusing lens and a detector box;

[0006] An inflation protection system is provided, which includes a focusing lens inflation port and a detector inflation port. The focusing lens inflation port and the detector inflation port are respectively connected to the focusing lens and the detector housing to inflate protective gas into the focusing lens and the detector housing.

[0007] According to an embodiment of the present invention, an anti-contamination structure for a focusing telescope includes a filter wheel at the bottom of the focusing optical system, a focusing lens at the top of the optical system, a first air inlet on the filter wheel, and an external air inlet pipe connected to the first air inlet to inflate the focusing lens; a shielding box at the bottom of the focusing optical system, a detector box installed inside the shielding box, and a second air inlet on the shielding box, with an external air inlet pipe connected to the second air inlet to inflate the detector box with protective gas.

[0008] According to an embodiment of the present invention, in an anti-contamination structure for a focusing telescope, the shielding box is disposed below the filter wheel, and the shielding box is provided with a first vent, the first vent being connected to the filter wheel.

[0009] According to an embodiment of the present invention, in an anti-contamination structure for a focusing telescope, the second air inlet includes:

[0010] The first interface connects to the external inflation tubing;

[0011] The second interface has one end connected to the first interface and the other end connected to the connection hole of the detector box, and the second interface is a heat-insulated interface.

[0012] According to an embodiment of the present invention, in an anti-pollution structure for a focusing telescope, a gap is provided between the second interface and the connection hole.

[0013] According to an embodiment of the present invention, in the anti-pollution structure applied to a focusing telescope, the circumferential gap between the second interface and the connecting hole is 0.3-0.8 mm;

[0014] And / or, the gap between the mating surface of the second interface and the mating surface of the connecting hole is 0.2-0.5mm.

[0015] According to an embodiment of the present invention, in an anti-contamination structure for a focusing telescope, the second interface includes a first end and a second end disposed opposite to each other, the first end being close to the first interface, the second end being close to the detector housing, and the cross-sectional area of ​​the first end being larger than the cross-sectional area of ​​the second end.

[0016] According to an embodiment of the present invention, in an anti-pollution structure for a focusing telescope, the first interface and the second interface are provided with mutually cooperating sealing grooves.

[0017] According to an embodiment of the present invention, in a pollution prevention structure for a focusing telescope, a threaded section is provided at the end of the first interface away from the second interface, and the first interface is threadedly connected to an external inflation pipeline through the threaded section.

[0018] According to an embodiment of the present invention, in an anti-pollution structure for a focusing telescope, the first air inlet is connected to the filter wheel via an air guide channel, and the air guide channel is provided with at least one stepped portion.

[0019] According to an embodiment of the present invention, in an anti-contamination structure for a focusing telescope, a second vent is provided on the top of the focusing optical system for venting air, and the second vent is located above the focusing lens.

[0020] According to an embodiment of the present invention, in an anti-pollution structure for a focusing telescope, there are multiple focusing optical systems, each of which is connected to an external inflation line.

[0021] According to an embodiment of the present invention, in an anti-pollution structure for a focusing telescope, a sunshade flipping mechanism is provided on the top of the focusing optical system, and the sunshade flipping mechanism cooperates with the light-shielding tube to form a closed space.

[0022] According to an embodiment of the present invention, in an anti-pollution structure for a focusing telescope, the inner wall of the light-shielding tube is coated with a polyimide film.

[0023] According to an embodiment of the present invention, in the anti-pollution structure applied to a focusing telescope, the flatness of the top of the light-shielding tube and the mounting surface of the sunshade flipping mechanism is less than 0.2 mm. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the anti-contamination structure for focusing telescopes provided by the present invention. Figure 1 .

[0026] Figure 2 This is a partial cross-sectional schematic diagram of the filter wheel and detector box provided by the present invention.

[0027] Figure 3 This is a schematic cross-sectional view of the installation of the second air intake interface provided by the present invention.

[0028] Figure 4 This is a schematic cross-sectional view of the installation of the first air intake interface provided by the present invention.

[0029] Figure 5 This is a schematic diagram of the anti-contamination structure for focusing telescopes provided by the present invention. Figure 2 .

[0030] Figure label:

[0031] 10. Focusing optical system;

[0032] 100. Focusing lens; 101. Second air outlet; 102. Sunshade tube; 103. Sunshade flipping mechanism; 1021. Polyimide film;

[0033] 200. Detector box; 210. Connection hole;

[0034] 300, Filter wheel; 310, First air intake port; 320, Air guide channel; 321, Stepped section;

[0035] 400, Shielding box; 410, Second air inlet; 411, First interface; 412, Second interface; 413, Threaded section; 420, First air outlet;

[0036] 500. Detector. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0038] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0039] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above 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 one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0041] Optical instruments are very sensitive to contaminants, especially focusing telescopes, which have even stricter requirements for contamination control. Existing focusing telescopes are easily contaminated by particulate and molecular contaminants during their development, which can damage the focusing telescopes and detectors and affect the normal operating life of telescopes used for space science exploration.

[0042] Particulate matter refers to aggregates of varying sizes, including dust, aerosols, and smoke particles. Particulate matter affects focusing optical systems in two ways: first, it reduces the effective area of ​​the focusing lens, lowering the scientific detection efficiency of the focusing telescope; second, it generates scattered light, and these stray photons reduce the telescope's angular resolution. Particulate matter can originate from within itself or from the surrounding environment. Sources from within itself include: particles generated by corrosion of metal structural components; particles remaining from the processing of structural components; dust adhering to components and falling during assembly and testing; and particles falling during vibrations from painting, coating, etc. External sources of particulate matter pollution may include: airborne particulate matter deposition during processing, assembly, and testing; particles falling from people and clothing; particles falling from packaging; particles adsorbed by electrostatic effects; particles from the vacuum system during vacuum experiments; and particles from satellites and other payloads during satellite testing and in orbit.

[0043] Molecular contaminants refer to various organic compounds, including carbon-based compounds, silicon compounds, water vapor, and lipid compounds. Molecular contaminants have two main impacts on optical instruments: First, they absorb photons, reducing the reflection efficiency of focusing lenses. Second, they form organic polymer layers that strongly absorb vacuum ultraviolet and soft X-ray photons. Finally, they can form molecular films, the diffusion and condensation of which can severely interfere with on-orbit calibration. Molecular contaminants can originate from within the instrument itself or from the environment during processing, integration, testing, and operation. Internal sources include exhaust fumes from the instrument's own materials, including fumes from corroded metal components and fumes from non-metallic materials. External sources include: the adhesion of atmospheric molecular contaminants during processing, integration, storage, and testing; the adhesion of contaminants from vacuum system exhaust during vacuum environment testing; and the redeposition of exhaust fumes and ejecta from satellites and other payloads during on-orbit operation.

[0044] According to an embodiment of the present invention, reference Figure 1 and Figure 2 As shown in the figure, the arrows indicate the gas flow direction. The anti-contamination structure applied to the focusing telescope includes: a focusing optical system 10, which is provided with a focusing lens 100 and a detector box 200; and a gas filling protection system, which is provided with a gas filling port and connected to the focusing lens 100 and the detector box 200 to fill the focusing lens 100 and the detector box 200 with protective gas.

[0045] The focusing optical system 10 is the core part of the focusing telescope, mainly including a focusing lens 100 and a detector box 200. The detector box 200 contains a detector 500. The focusing lens 100 is responsible for receiving light signals, while the detector 500 is responsible for converting the received light signals into electrical signals for further processing.

[0046] The gas-filling protection system is connected to the focusing lens and detector housing to fill the focusing lens and detector housing with protective gas (such as nitrogen). The function of the protective gas is to isolate external contaminants, such as dust, water vapor, chemical gases, etc., thereby keeping the optical components clean and stable in performance.

[0047] In some embodiments, to maintain the nitrogen concentration and cleanliness inside the optical system 10, a nitrogen circulation system can be designed. This system includes an inlet, an outlet, and necessary filtration and purification devices. Nitrogen enters the optical system 10 through the inlet, flows over the detector and focusing lens surfaces, and is then discharged through the outlet. Simultaneously, a monitoring device can be installed to detect the nitrogen concentration and the level of contamination inside the optical system 10, allowing for timely adjustments to the supply and circulation speed of the protective gas.

[0048] The embodiments of the present invention provide effective anti-contamination protection for the key optical components of the focusing telescope by integrating an inflation protection system. This system can not only isolate external contaminants and keep the optical components clean and stable in performance, but also continuously maintain the cleanliness of the inside of the optical system 10 through a nitrogen circulation and emission mechanism. This design can effectively ensure the high cleanliness of the space science exploration satellite during ground development, and guarantee its performance and scientific output.

[0049] According to one embodiment of the telescope of the present invention, the anti-contamination structure applied to the focusing telescope includes a focusing optical system 10 and a gas-filling protection system. The focusing optical system 10 is provided with a focusing lens 100 and a detector 500. The gas-filling protection system is connected to the focusing lens 100 and the detector housing 200 to fill the focusing lens 100 and the detector housing 200 with protective gas. By setting up the gas-filling protection system and filling the focusing lens 100 or the detector 500 with protective gas, direct contact between the focusing lens 100 and the detector 500 and the external environment is isolated, thereby preventing contaminants (such as particulate contaminants and molecular contaminants) from adhering to critical components, avoiding damage to the focusing lens 100 and the detector 500, and improving the stability and service life of the telescope.

[0050] According to an embodiment of the present invention, reference Figures 1-4 As shown, a filter wheel 300 is provided at the bottom of the focusing optical system 10, and a focusing lens 100 is provided at the top of the focusing optical system 10. The filter wheel 300 is provided with a first air inlet 310, and an external air inlet pipe is connected to the first air inlet 310 to inflate the focusing lens 100.

[0051] In this embodiment, the filter wheel 300 is located at the bottom of the focusing optical system 10 and is responsible for selecting and replacing filters according to observation requirements. The filter wheel 300 is designed with a first air inlet 310 for connecting to an external gas filling pipeline. The focusing lens 100 is installed at the top of the focusing optical system 10 and is an important component for receiving and focusing light. When the external gas filling pipeline starts working, protective gas (such as nitrogen) enters the pipeline from an external gas source and enters the filter wheel 300 through the first air inlet 310. Subsequently, the gas flows in a specific airflow channel and flows from bottom to top through the focusing lens, forming a one-way path. Finally, it reaches the top of the focusing optical system and is discharged from the second air outlet, ensuring that the focusing lens 100 receives all-round, all-around protection and improving the anti-contamination effect.

[0052] According to an embodiment of the present invention, reference Figure 1 and Figure 3 As shown, a shielding box 400 is provided at the bottom of the focusing optical system 10, the detector box 200 is installed inside the shielding box 400, and the shielding box 400 is provided with a second air inlet 410. An external air inlet pipe is connected to the second air inlet 410 to fill the detector 500 with protective gas.

[0053] It should be noted that, in order to avoid damage to the detector 500 from space environment radiation, the detector 500 can be placed inside the oxygen-free copper shielding box 400. The shielding box 400 is installed at the bottom of the optical system 10, which facilitates connection with the external inflation pipeline and can effectively prevent contaminants from below from entering. The inside of the shielding box 400 should be kept in a dry, dust-free, and non-corrosive gas-free environment to ensure the normal operation and long life of the detector 500.

[0054] The shielding box 400 is equipped with a second air inlet 410 for connecting to an external inflation pipeline. This inlet should have good sealing and corrosion resistance to ensure that the protective gas can smoothly enter the shielding box 400 and prevent external contaminants from entering through the inlet. The external inflation pipeline originates from an external nitrogen source or other protective gas source and connects to the second air inlet 410 via a connector. The inside of the pipeline should be smooth and well-sealed to reduce gas flow resistance and the possibility of leakage. Simultaneously, valves, flow meters, and other control elements can be installed on the external inflation pipeline to precisely regulate the flow and pressure of the protective gas.

[0055] When the external inflation pipeline starts working, the protective gas enters the pipeline from the external gas source, enters the shielding box 400 through the second air inlet 410, flows through the connection hole 210 into the detector box 200, and finally enters the first air outlet 420 after purging the detector surface. The protective gas forms a stable protective layer in the shielding box 400, effectively isolating the detector 500 from external contaminants.

[0056] According to an embodiment of the present invention, reference Figures 1-4 As shown, the shielding box 400 is disposed below the filter wheel 300, and the shielding box 400 is provided with a first air outlet 420, which is connected to the filter wheel 300.

[0057] Understandably, in this embodiment, when the system starts up, an external nitrogen source fills the shielding box 400 with pure nitrogen through an external filling pipeline. The nitrogen forms a protective layer inside the shielding box 400, effectively isolating the detector 500 from external contaminants. Simultaneously, as nitrogen is continuously added and accumulated, it flows out of the shielding box 400 through the first outlet 420 and enters the filter wheel 300 area. By combining the shielding box 400 with the filter wheel 300, the gas entering the shielding box 400 flows into the filter wheel 300 from the first outlet 420, merges with the gas at the filter wheel 300, and flows out through the same path. This facilitates the design of a unified nitrogen circuit, simplifies the system layout and installation process, and improves the system's integration and aesthetics. The nitrogen circuit design allows for continuous recycling of nitrogen within the system, reducing nitrogen waste and emissions, and improving the system's environmental friendliness and economy.

[0058] According to an embodiment of the present invention, reference Figure 4 and Figure 5 As shown, the second air inlet 410 includes a first interface 411 and a second interface 412. The first interface 411 is connected to an external air inflation line. One end of the second interface 412 is connected to the first interface 411, and the other end is connected to the connection hole 210 of the detector box 200. The second interface 412 is a heat-insulated interface.

[0059] Understandably, in this embodiment, the first interface 411 is responsible for connecting to the external gas filling pipeline to ensure that nitrogen can smoothly enter the system from the external nitrogen source. One end of the second interface 412 is tightly connected to the first interface 411, forming a channel for nitrogen flow. The second interface 412 is designed as a heat-insulated interface and is connected to the connection hole 210 of the detector housing 200. This heat-insulated interface can use special heat-insulating materials and structural designs to block or reduce external heat conduction to the low-temperature detector 500 through the interface.

[0060] When the system starts up, an external nitrogen source injects pure nitrogen into the first port 411 of the second air inlet port 410 through the inflation pipeline. After the nitrogen enters the second port 412 through the first port 411, the temperature of the detector 500 is effectively controlled due to the heat insulation design of the second port 412. Subsequently, the nitrogen enters the connection hole 210 of the detector 500 through the heat insulation interface, providing comprehensive anti-contamination protection for the detector 500. In this process, the heat insulation interface effectively blocks the conduction of external heat to the detector 500, ensuring that the detector 500 operates in a stable working environment.

[0061] For example, the first interface 411 is made of stainless steel, and the second interface 412 is made of polyimide or other heat-insulating materials. This embodiment does not make specific limitations.

[0062] According to an embodiment of the present invention, reference Figure 3 As shown, a gap is provided between the second interface 412 and the connection hole 210 for heat insulation.

[0063] It is understood that in this embodiment, in order to further improve the heat insulation effect, there is still a certain gap between the second interface 412 and the connection hole 210 after they are connected. By setting the heat insulation gap, the influence of external heat on the detector 500 is significantly reduced, and the heat insulation performance of the system is further improved.

[0064] According to an embodiment of the present invention, reference Figure 3 As shown, the circumferential gap between the second interface 412 and the connecting hole 210 is 0.3-0.8 mm; and / or, the gap between the mating surface of the second interface 412 and the mating surface of the connecting hole 210 is 0.2-0.5 mm.

[0065] In this embodiment, the circumferential clearance refers to the circumferential gap between the outer circle of the second interface 412 and the inner circle of the connection hole 210 of the detector box 200. The mating surface gap refers to the axial distance between the mating surfaces of the second interface 412 and the connection hole 210 of the detector 500, and the distance between the end face of the second interface 412 and the end face of the connection hole 210.

[0066] If the gap is too small, it may not form an effective heat insulation layer, while if the gap is too large, it may cause nitrogen leakage, thereby reducing the gas filling protection effect. Therefore, the circumferential gap between the second interface 412 and the connecting hole 210 is 0.3-0.8 mm, and the gap between the mating surface of the second interface 412 and the mating surface of the connecting hole 210 is 0.2-0.5 mm. This ensures a certain heat insulation effect while minimizing the leakage of filled nitrogen through these gaps. By controlling the circumferential gap and the gap between the mating surfaces, effective blocking of external heat is achieved, improving the heat insulation performance of the system. Good sealing performance ensures a stable and continuous supply of nitrogen to the detector box 200, providing necessary anti-contamination protection for the detector 500.

[0067] Optionally, the second interface 412 is inserted into the connection hole 210 with an insertion depth of 4mm, a circumferential gap of 0.5mm, and a mating surface gap of 0.2mm.

[0068] According to an embodiment of the present invention, reference Figure 3 As shown, the second interface 412 includes a first end and a second end that are positioned opposite each other. The first end is close to the first interface 411, and the second end is close to the detector box 200. The cross-sectional area of ​​the first end is larger than that of the second end.

[0069] Understandably, in this embodiment, the nitrogen flow rate required by the detector 500 is relatively small. Therefore, at the second end near the detector 500, the inner diameter of the interface is designed to be small (approximately 4 mm) to meet the nitrogen flow rate requirements of the detector 500. This design helps to precisely control the nitrogen flow rate, ensuring that the detector 500 is in optimal working condition. Furthermore, the smaller diameter reduces the risk of particulate matter entering the detector housing 200 before and during assembly, which is crucial for maintaining the cleanliness and accuracy of the detector 500. The small diameter design at the second end also considers the thickness limitation of the detector housing 200. Since the thickness of the detector housing 200 is fixed, the small diameter design needs to ensure that it does not interfere with the detector 500 during assembly, while ensuring that nitrogen can smoothly enter the interior of the detector housing 200.

[0070] In addition, since the system may contain multiple interfaces and rotating wheels, in order to maintain the system's uniformity and compatibility, the inner diameter of the outer interface (i.e., the first end) is designed to be larger. This ensures smooth connection with other interfaces and components of the external inflation pipeline, reducing the complexity of installation and debugging.

[0071] According to one embodiment of the present invention, the first interface 411 and the second interface 412 are provided with mutually cooperating sealing grooves, one of which is provided with a positioning protrusion and the other is provided with a groove that cooperates with the positioning protrusion.

[0072] In this embodiment, on the mating surfaces of the first interface 411 and the second interface 412, one interface is designed with a positioning protrusion, while the other interface is correspondingly provided with a groove that mates with the positioning protrusion. When the two interfaces are mated, the positioning protrusion will naturally slide into the groove, achieving precise alignment of the interfaces. At the same time, the matching of the protrusion and the groove can increase the contact area, reduce gas leakage, and achieve a sealing effect.

[0073] The design of the positioning protrusions and grooves ensures precise alignment of the first interface 411 and the second interface 412 during docking, avoiding problems such as air leakage or poor sealing caused by positional deviations. Furthermore, the positioning design makes the docking process more intuitive and convenient, reducing installation difficulty and cost, and improving installation efficiency.

[0074] According to an embodiment of the present invention, reference Figure 3 As shown, the end of the first interface 411 away from the second interface 412 is provided with a threaded section 413, and the first interface 411 is threadedly connected to the external inflation pipeline through the threaded section 413.

[0075] Understandably, the first interface 411 is threadedly connected to the external inflation line via a threaded section 413. This threaded connection provides a tight and reliable connection. By rotating the first interface 411, the threaded section 413 gradually screws into the corresponding thread of the external inflation line, forming a tight seal. This sealing method helps prevent nitrogen leakage during transmission, ensuring the stability of the nitrogen supply. The threaded connection not only provides a tight seal but also enhances the stability of the interface, and is easy to install and disassemble.

[0076] According to an embodiment of the present invention, reference Figure 4 As shown, the first air inlet 310 is connected to the filter wheel 300 through the air guide channel 320, and the air guide channel 320 is provided with at least one stepped portion 321.

[0077] Understandably, the gas guide channel 320, as the essential path for nitrogen gas to flow from the inlet to the interior of the filter rotor 300, has a significant impact on the smoothness of airflow and the impact on the cavity. When nitrogen gas passes through the gas guide channel 320 at high speed, the stepped portion 321 acts as a buffer, slowing down the airflow velocity and reducing its kinetic energy. This buffering effect effectively reduces the direct impact of the airflow on fragile components inside the cavity (such as the membrane). Through the buffering effect of the stepped portion 321, the impact of the airflow on the cavity is reduced, improving the overall stability and reliability of the system. Reduced impact and wear on the interior of the cavity helps extend the service life of the filter rotor 300 and other related components.

[0078] In some embodiments, there may be multiple steps 321, and the multiple steps 321 are spaced apart along the extension direction of the air guide channel 320 to improve the buffering effect.

[0079] According to one embodiment of the present invention, a second air outlet 101 for venting is provided on the top of the focusing optical system 10, and the second air outlet 101 is located above the focusing lens 100.

[0080] In this embodiment, the second vent 101 is positioned at the top of the focusing optical system 10, above the focusing lens 100, and above the light shield 102 of the focusing telescope. This ensures that nitrogen gas, after flowing through the focusing lens 100 and completing its protective function, can be promptly and smoothly discharged from the top of the system, preventing nitrogen gas from accumulating in the cavity or forming undesirable airflow circulation. Simultaneously, the second vent effectively balances the pressure difference inside the focusing optical system 10, such as during launch ascent when the external air pressure rapidly decreases, effectively expelling the gas inside the focusing optical system 10 quickly.

[0081] According to one embodiment of the present invention, an air outlet channel is formed on the top of the focusing optical system 10, the air outlet channel is connected to the second air outlet 101, and the air outlet channel is a labyrinth channel.

[0082] It is understandable that the air outlet channel is set as a labyrinth channel, that is, the channel is equipped with multiple labyrinth partitions, or the channel is designed as a disc, etc., to prevent the generation of new pollutants or the introduction of external pollutants during the airflow discharge process, so as to ensure ventilation while preventing external pollutants from entering the focusing optical system 10 through the second air outlet 101 and the air outlet channel.

[0083] According to an embodiment of the present invention, reference Figure 1 As shown, there are multiple focusing optical systems 10, and each focusing optical system 10 is connected to an external inflation pipeline.

[0084] In one specific embodiment, the focusing telescope includes two focusing optical systems 10, each of which is connected to an external inflation line. These systems can be connected to the same external inflation line or to different external inflation lines, ensuring that each focusing optical system 10 is effectively protected.

[0085] According to an embodiment of the present invention, reference Figure 1 and Figure 5 As shown, a sunshade flipping mechanism 103 is provided on the top of the focusing optical system 10. The sunshade flipping mechanism 103 and the light shield tube 102 cooperate to form a closed space for sealing and protecting the focusing lens.

[0086] According to an embodiment of the present invention, reference Figure 5 As shown, a polyimide film 1021 is adhered to the inner wall of the light-shielding tube 102. Since the focusing lens is located inside the light-shielding tube 102, and the tube is primarily made of composite materials such as carbon fiber, it typically has a high venting rate. Therefore, to prevent venting from the inside of the light-shielding tube 102 from contaminating the focusing lens, a black aluminized polyimide film 1021 is adhered to the inner surface of the tube. This shields the carbon fiber material from directly venting towards the focusing lens, thus protecting the focusing lens. The black film must be adhered smoothly, without any leaks, holes, or bulges, and the light-shielding tube 102 must be vented before and after application.

[0087] According to an embodiment of the present invention, reference Figure 1 and Figure 5 As shown, the flatness of the top of the sunshade tube 102 and the mounting surface of the sunshade flipping mechanism 103 is less than 0.2mm, so as to ensure that the sunshade flipping mechanism 103 and the sunshade tube 102 are in close contact and prevent air leakage and dust migration.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A contamination-resistant structure for use in focusing telescopes, characterized in that, include: A focusing optical system, wherein the focusing optical system is provided with a focusing lens and a detector box; An inflation protection system is provided, which includes a focusing lens inflation port and a detector inflation port. The focusing lens inflation port and the detector inflation port are respectively connected to the focusing lens and the detector housing to inflate protective gas into the focusing lens and the detector housing. The focusing optical system has a filter wheel at its bottom and a focusing lens at its top. The filter wheel has a first air inlet, and an external inflation pipe is connected to the first air inlet to inflate the focusing lens. The focusing optical system also has a shielding box at its bottom, and a detector box is installed inside the shielding box. The shielding box has a second air inlet, and an external inflation pipe is connected to the second air inlet to inflate the detector box with protective gas. The shielding box is disposed below the filter wheel, and the shielding box is provided with a first air outlet, which is connected to the filter wheel; The top of the focusing optical system is provided with a second air outlet for venting air, which is located above the focusing lens.

2. The anti-contamination structure for a focusing telescope according to claim 1, characterized in that, The second air intake interface includes: The first interface connects to the external inflation tubing; The second interface has one end connected to the first interface and the other end connected to the connection hole of the detector box, and the second interface is a heat-insulated interface.

3. The anti-contamination structure for a focusing telescope according to claim 2, characterized in that, A gap is provided between the second interface and the connection hole.

4. The anti-contamination structure for a focusing telescope according to claim 3, characterized in that, The circumferential gap between the second interface and the connecting hole is 0.3-0.8 mm; And / or, the gap between the mating surface of the second interface and the mating surface of the connecting hole is 0.2-0.5mm.

5. The anti-contamination structure for a focusing telescope according to claim 2, characterized in that, The second interface includes a first end and a second end that are positioned opposite each other, the first end being closer to the first interface and the second end being closer to the detector box, and the cross-sectional area of ​​the first end being larger than the cross-sectional area of ​​the second end.

6. The anti-contamination structure for a focusing telescope according to claim 2, characterized in that, The first interface and the second interface are provided with mutually cooperating sealing grooves.

7. The anti-contamination structure for a focusing telescope according to claim 2, characterized in that, The first interface has a threaded section at the end away from the second interface, and the first interface is threadedly connected to an external inflation pipeline through the threaded section.

8. The anti-contamination structure for a focusing telescope according to claim 1, characterized in that, The first air inlet is connected to the filter wheel through an air guide channel, and the air guide channel is provided with at least one stepped portion.

9. The anti-contamination structure for a focusing telescope according to any one of claims 1-8, characterized in that, There are multiple focusing optical systems, and each optical system is connected to an external inflation line.

10. The anti-contamination structure for a focusing telescope according to any one of claims 1-8, characterized in that, The top of the focusing optical system is provided with a sunshade flipping mechanism, which, together with the light-shielding tube, forms a closed space.

11. The anti-contamination structure for a focusing telescope according to claim 10, characterized in that, The inner wall of the light-shielding tube is covered with a polyimide film.

12. The anti-contamination structure for a focusing telescope according to claim 10, characterized in that, The flatness of the top of the shading tube and the mounting surface of the shading flipping mechanism is less than 0.2 mm.

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