Anti-pollution structure applied to focusing telescope

Abstract

The invention relates to the technical field of space science detection, and provides an anti-pollution structure applied to a focusing telescope, the focusing telescope comprises a focusing optical system and an inflation protection system, and the focusing optical system is provided with a focusing lens and a detector box; the inflation protection system is provided with an inflation inlet and is connected to the focus lens and the detector box so as to inflate protective gas into the focus lens and the detector box. By arranging the inflation protection system and filling protective gas into the focus lens or the detector box, direct contact between the focus lens and the detector and the external environment is isolated, so that pollutants (such as particle pollutants and molecular pollutants) are prevented from being attached to key components, the focus lens and the detector are prevented from being polluted, and the service life of the focus lens and the detector is prolonged. The high cleanliness and good scientific performance of the telescope are guaranteed, and the stability and the service life of the telescope are improved.

Description

Technical Field

[0001] The invention relates to the technical field of space science detection, and in particular to an anti-pollution structure applied to a focusing telescope. Background Art

[0002] Optical instruments are very sensitive to contaminants, especially focusing telescopes, which have more stringent requirements on pollution. Existing focusing telescopes are easily contaminated by particulate and molecular pollutants during operation, which can lead to the degradation of the optical parameters of the focusing telescope and the degradation or even damage of the detector performance, thus affecting the service life of the focusing telescope. Summary of the invention

[0003] The invention provides a telescope with an anti-pollution structure applied to a focusing telescope, so as to solve the defect that the existing telescope is easily polluted and damaged.

[0004] The anti-pollution structure applied to a focusing telescope according to an embodiment of the present invention comprises: A focusing optical system, wherein the focusing optical system is provided with a focusing mirror and a detector box; An inflation protection system is provided with a focusing mirror inflation port and a detector inflation port, and the focusing mirror inflation port and the detector inflation port are respectively connected to the focusing mirror and the detector box to inflate protective gas into the focusing mirror and the detector box.

[0005] According to the anti-pollution structure applied to a focusing telescope according to an embodiment of the present invention, a filter wheel is provided at the bottom of the focusing optical system, the focusing mirror is provided at the top of the optical system, the filter wheel is provided with a first air inlet interface, and an external air filling pipeline is connected to the first air inlet interface to inflate the focusing mirror; a shielding box is provided at the bottom of the focusing optical system, the detector box is installed in the shielding box, and the shielding box is provided with a second air inlet interface, and an external air filling pipeline is connected to the second air inlet interface to fill the detector box with protective gas.

[0006] According to the anti-pollution structure applied to the focusing telescope of the embodiment of the present invention, the shielding box is arranged below the filter wheel, and the shielding box is provided with a first air outlet, and the first air outlet is connected to the filter wheel.

[0007] According to the anti-pollution structure applied to a focusing telescope according to an embodiment of the present invention, the second air inlet interface includes: A first interface, connected to an external inflation pipeline; The second interface has one end connected to the first interface and the other end connected to the connecting hole of the detector box, and the second interface is a heat-insulating interface.

[0008] According to the anti-pollution structure applied to a focusing telescope according to an embodiment of the present invention, a gap is provided between the second interface and the connecting hole.

[0009] According to the anti-pollution structure applied to a focusing telescope according to an embodiment of the present invention, the circumferential gap between the second interface and the connecting hole is 0.3-0.8 mm; And / or, a gap between a mating surface of the second interface and a mating surface of the connecting hole is 0.2-0.5 mm.

[0010] According to the anti-pollution structure applied to a focusing telescope according to an embodiment of the present invention, the second interface includes a first end and a second end that are relatively arranged, the first end is close to the first interface, the second end is close to the detector box, and the cross-sectional area of ​​the first end is larger than the cross-sectional area of ​​the second end.

[0011] According to the anti-pollution structure applied to a focusing telescope according to an embodiment of the present invention, the first interface and the second interface are provided with sealing grooves that cooperate with each other.

[0012] According to the anti-pollution structure applied to a focusing telescope according to an embodiment of the present invention, a threaded section is provided at one 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.

[0013] According to the anti-pollution structure applied to a focusing telescope according to an embodiment of the present invention, the first air inlet interface is connected to the filter wheel through an air guide channel, and the air guide channel is provided with at least one step portion.

[0014] According to the anti-pollution structure applied to a focusing telescope according to an embodiment of the present invention, a second air outlet for exhausting air is arranged on the top of the focusing optical system, and the second air outlet is located above the focusing mirror.

[0015] According to the anti-pollution structure applied to a focusing telescope according to an embodiment of the present invention, there are multiple focusing optical systems, and each of the optical systems is connected to an external air-filled pipeline.

[0016] According to the anti-pollution structure applied to a focusing telescope according to an embodiment of the present invention, 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.

[0017] According to the anti-pollution structure applied to a focusing telescope according to an embodiment of the present invention, a polyimide film is pasted on the inner wall of the light-shielding tube.

[0018] According to the anti-pollution structure applied to a focusing telescope according to an embodiment of the present invention, the flatness of the mounting surface between the top of the light-shielding tube and the sunshade flipping mechanism is less than 0.2 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 The structure diagram of the anti-pollution structure applied to the focusing telescope provided by the present invention is Figure 1 .

[0021] Figure 2 It is a partial cross-sectional schematic diagram of the filter wheel and the detector box provided by the present invention.

[0022] Figure 3 It is a schematic cross-sectional installation diagram of the second air inlet interface provided by the present invention.

[0023] Figure 4 It is a schematic cross-sectional installation diagram of the first air inlet interface provided by the present invention.

[0024] Figure 5 The structure diagram of the anti-pollution structure applied to the focusing telescope provided by the present invention is Figure 2 .

[0025] Reference numerals: 10. Focusing optical system; 100, focusing lens; 101, second air outlet; 102, light shielding tube; 103, sunshade flip mechanism; 1021, polyimide film; 200, detector box; 210, connection hole; 300, filter wheel; 310, first air inlet interface; 320, air guide channel; 321, step portion; 400, shielding box; 410, second air inlet interface; 411, first interface; 412, second interface; 413, threaded section; 420, first air outlet; 500. Detector. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0027] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0028] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0030] Optical instruments are very sensitive to contaminants, especially focusing telescopes, which have more stringent requirements on pollution. Existing focusing telescopes are easily contaminated by particulate and molecular pollutants during the development process, which can cause damage to the focusing telescope and detector, and affect the normal working life of the telescope's space science detection satellite.

[0031] Particle pollutants refer to aggregates of different sizes, including dust, aerosols, smoke particles, etc. Particle pollutants have two effects on focusing optical systems: first, they reduce the effective area of ​​optical equipment, that is, the focusing mirror, and reduce the scientific detection efficiency of the focusing telescope; second, they generate scattered light. These stray photons will reduce the angular resolution performance of the telescope. Particle pollutants may come from themselves or be polluted by the surrounding environment. Possibilities from themselves include: particles generated by corrosion of metal structural parts; particles remaining from structural parts processing; dust attached to parts, dropped during assembly and testing; particles dropped during vibration such as painting and coating, etc. The sources of particle pollution from the outside may include: deposition of particles in the air during processing, assembly and testing; particles dropped from the human body and clothing; particles dropped from packaging; particles adsorbed by electrostatic effects; particles from the vacuum system during vacuum experiments; particles from satellites and other payloads during satellite testing and in orbit, etc.

[0032] Molecular pollutants refer to various organic compounds: including carbon-based compounds, silicon compounds, water vapor, oil and fat compounds, etc. Molecular pollutants also have two effects on optical instruments: first, molecular pollutants themselves absorb photons and reduce the reflection efficiency of the focusing mirror; second, molecular pollutants generate organic polymer layers that strongly absorb vacuum ultraviolet and soft X-ray photons; finally, molecular pollutants will also form molecular films, and the diffusion and condensation of these films will seriously interfere with the on-orbit calibration of the instrument. Molecular pollutants may come from themselves or from the environment during processing, integration, testing, and work. Self-sources include: exhaust from the materials selected by the instrument itself, including exhaust from metal parts after corrosion, exhaust from non-metallic materials, etc. Sources from outside the instrument include: attachment of atmospheric molecular pollutants during processing, integration, storage, and testing; attachment of vacuum system exhaust pollutants during vacuum environment testing; redeposition of exhaust and ejecta from satellites and other payloads while in orbit, etc.

[0033] According to one embodiment of the present invention, referring to Figure 1 and Figure 2 As shown in the figure, the arrows indicate the gas flow direction, and the anti-pollution structure applied to the focusing telescope includes: a focusing optical system 10, which is provided with a focusing mirror 100 and a detector box 200; an inflation protection system, which is provided with an inflation port and is connected to the focusing mirror 100 and the detector box 200 to fill the focusing mirror 100 and the detector box 200 with protective gas.

[0034] The focusing optical system 10 is the core part of the focusing telescope, and mainly includes a focusing mirror 100 and a detector box 200. The detector box 200 is equipped with a detector 500. The focusing mirror 100 is responsible for receiving optical signals, and the detector 500 is responsible for converting the received optical signals into electrical signals for further processing.

[0035] The gas filling protection system is connected to the focusing mirror and the detector box to fill the focusing mirror and the detector box with protective gas (such as nitrogen). The function of the protective gas is to isolate external pollutants such as dust, water vapor, chemical gases, etc., so as to keep the optical components clean and the performance stable.

[0036] In some embodiments, in order to maintain the nitrogen concentration and cleanliness inside the optical system 10, a nitrogen circulation system can be designed, which includes an air inlet, an air outlet, and necessary filtering and purification devices. After the nitrogen enters the optical system 10 from the air inlet, it flows through the detector and the focusing lens surface, and then is discharged through the air outlet. At the same time, a monitoring device can be set to detect the nitrogen concentration and the contamination inside the optical system 10, so as to adjust the supply amount and circulation speed of the protective gas in time.

[0037] The embodiment of the present invention provides effective anti-pollution protection for the key optical components of the focusing telescope by integrating an inflatable protection system. The system can not only isolate external pollutants and keep the optical components clean and stable in performance, but also continuously maintain the cleanliness inside the optical system 10 through a nitrogen circulation and exhaust mechanism. This design can effectively ensure the high cleanliness of space science exploration satellites during ground development, thereby ensuring their performance and scientific output.

[0038] According to an embodiment of the telescope of the present invention, the anti-pollution structure applied to the focusing telescope includes a focusing optical system 10 and a gas-filled protection system, wherein the focusing optical system 10 is provided with a focusing mirror 100 and a detector 500; the gas-filled protection system is connected to the focusing mirror 100 and the detector box 200 to fill the focusing mirror 100 and the detector box 200 with protective gas. By providing the gas-filled protection system and filling the focusing mirror 100 or the detector 500 with protective gas, the focusing mirror 100 and the detector 500 are isolated from direct contact with the external environment, thereby preventing pollutants (such as particulate pollutants and molecular pollutants) from adhering to key components, avoiding damage to the focusing mirror 100 and the detector 500, and improving the stability and service life of the telescope.

[0039] According to one embodiment of the present invention, referring to Figure 1-Figure 4 As shown, a filter wheel 300 is disposed at the bottom of the focusing optical system 10, and the focusing mirror 100 is disposed at the top of the focusing optical system 10. The filter wheel 300 is provided with a first air inlet interface 310, and an external air filling pipeline is connected to the first air inlet interface 310 to fill the focusing mirror 100.

[0040] 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 the filter according to the observation requirements. The filter wheel 300 is designed with a first air inlet interface 310 for connecting the external air charging 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 air charging pipeline starts to work, the protective gas (such as nitrogen and other gases) enters the pipeline from the external gas source and enters the filter wheel 300 through the first air inlet interface 310. Subsequently, the gas flows in a specific air flow channel and flows from the bottom to the top through the focusing lens to form a one-way passage, and finally reaches the top of the focusing optical system and is discharged from the second air outlet, ensuring that the focusing lens 100 is protected in all directions without dead angles, and improving the anti-pollution effect.

[0041] According to one embodiment of the present invention, referring to 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 in the shielding box 400, and the shielding box 400 is provided with a second air inlet interface 410, and an external air filling pipeline is connected to the second air inlet interface 410 to fill the detector 500 with protective gas.

[0042] It should be noted that in order to prevent the detector 500 from being damaged by radiation from the space environment, the detector 500 can be placed in an oxygen-free copper shielding box 400. The shielding box 400 is installed at the bottom of the optical system 10 to facilitate connection with the external inflation pipeline and effectively prevent the invasion of pollutants from below. The interior of the shielding box 400 should maintain a dry, dust-free, and non-corrosive gas environment to ensure the normal operation and long life of the detector 500.

[0043] The shielding box 400 is provided with a second air inlet interface 410 for connecting an external air filling pipeline. The interface should have good sealing and corrosion resistance to ensure that the shielding gas can smoothly enter the shielding box 400 and prevent external pollutants from entering through the interface. The external air filling pipeline starts from an external nitrogen source or other shielding gas source and is connected to the second air inlet interface 410 through a connector. The inside of the pipeline should be smooth and well sealed to reduce the resistance to gas flow and the possibility of leakage. At the same time, control elements such as valves and flow meters can be set on the external air filling pipeline to accurately adjust the flow and pressure of the shielding gas.

[0044] When the external inflation pipeline starts working, the protective gas enters the pipeline from the external gas source, and enters the shielding box 400 through the second air inlet interface 410, then flows through the connecting hole 210 into the detector box 200, and finally enters the first air outlet 420 after blowing the surface of the detector. The protective gas forms a stable protective layer in the shielding box 400, which effectively isolates the detector 500 from external pollutants.

[0045] According to one embodiment of the present invention, referring to Figure 1-Figure 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 .

[0046] It is understandable that, in the present embodiment, when the system is started, the external nitrogen source is filled with pure nitrogen through the external gas filling pipeline into the shielding box 400. Nitrogen forms a protective layer in the shielding box 400, which effectively isolates the infringement of the detector 500 by external pollutants. At the same time, as the nitrogen is continuously filled and accumulated, the nitrogen will flow out of the shielding box 400 through the first gas outlet 420 and enter the filter wheel 300 area. By combining the shielding box 400 with the filter wheel 300, the gas introduced into the shielding box 400 flows into the filter wheel 300 from the first gas outlet 420, and can flow out through the same flow path after merging with the gas at the filter wheel 300, which is convenient for designing a unified nitrogen loop, simplifies the layout and installation process of the system, and improves the integration and aesthetics of the system. The design of the nitrogen loop enables nitrogen to be continuously circulated in the system, reduces the waste and discharge of nitrogen, and improves the environmental protection and economy of the system.

[0047] According to one embodiment of the present invention, referring to Figure 4 and Figure 5 As shown, the second air inlet interface 410 includes a first interface 411 and a second interface 412, the first interface 411 is connected to the external inflation pipeline; one end of the second interface 412 is connected to the first interface 411, and the other end is connected to the connecting hole 210 of the detector box 200, and the second interface 412 is a heat-insulating interface.

[0048] It is understandable that, in this embodiment, the first interface 411 is responsible for connecting with the external gas charging pipeline to ensure that nitrogen can smoothly enter the system from the external nitrogen source. One end of the second interface 412 is closely connected to the first interface 411 to form a channel for nitrogen flow, and the second interface 412 is designed as a heat-insulating interface and connected to the connecting hole 210 of the detector box 200. This heat-insulating interface can use special heat-insulating materials and structural designs to block or reduce the external heat from being conducted to the low-temperature detector 500 through the interface.

[0049] When the system is started, the external nitrogen source fills the first interface 411 of the second air inlet interface 410 with pure nitrogen through the charging pipeline. After the nitrogen enters the second interface 412 through the first interface 411, the temperature of the detector 500 is effectively controlled due to the heat insulation design of the second interface 412. Subsequently, the nitrogen enters the connection hole 210 of the detector 500 through the heat insulation interface, providing all-round anti-pollution 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.

[0050] Exemplarily, the first interface 411 is made of stainless steel, and the second interface 412 is made of polyimide or other heat insulating materials, which is not specifically limited in this embodiment.

[0051] According to one embodiment of the present invention, referring to Figure 3 As shown, a gap is provided between the second interface 412 and the connecting hole 210 for heat insulation.

[0052] It can be understood that in this embodiment, in order to further improve the thermal insulation effect, a certain gap is still provided between the second interface 412 and the connecting hole 210 after the two are docked. By setting the thermal insulation interval, the influence of external heat on the detector 500 is significantly reduced, and the thermal insulation performance of the system is further improved.

[0053] According to one embodiment of the present invention, referring to 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.

[0054] In this embodiment, the circumferential gap refers to the gap along the circumferential direction between the outer circle of the second interface 412 and the inner circle of the connecting hole 210 of the detector box 200, and the docking surface gap refers to the axial distance between the docking surfaces of the second interface 412 and the connecting hole 210 of the detector 500, and the distance between the end face of the second interface 412 and the end face of the connecting hole 210.

[0055] If the gap is too small, it may not be enough to form an effective insulation layer, while if the gap is too large, it may cause nitrogen leakage and reduce the inflation protection effect. Therefore, the circumferential gap between the second interface 412 and the connecting hole 210 is 0.3-0.8mm, and the gap between the docking surface of the second interface 412 and the docking surface of the connecting hole 210 is 0.2-0.5mm, which can not only ensure a certain insulation effect, but also avoid the nitrogen filled from flowing out of the gap as much as possible. By controlling the circumferential gap and the gap between the docking surfaces, effective blocking of external heat is achieved, and the thermal insulation performance of the system is improved. Good sealing performance ensures that nitrogen can be stably and continuously supplied to the detector box 200, providing the necessary anti-pollution protection for the detector 500.

[0056] Optionally, the insertion depth of the second interface 412 into the connecting hole 210 is designed to be 4 mm, the circumferential gap is 0.5 mm, and the butt surface gap is 0.2 mm.

[0057] According to one embodiment of the present invention, referring to Figure 3 As shown, the second interface 412 includes a first end and a second end that are oppositely arranged, the first end is close to the first interface 411, the second end is close to the detector box 200, and the cross-sectional area of ​​the first end is larger than the cross-sectional area of ​​the second end.

[0058] It is understandable that in this embodiment, the flow rate of nitrogen required by the detector 500 is relatively small. Therefore, at the second end close to the detector 500, the inner diameter of the interface is designed to be smaller (about 4 mm) to meet the demand of the detector 500 for nitrogen flow. This design helps to accurately control the flow rate of nitrogen and ensure that the detector 500 is in the best working condition. And the smaller caliber can reduce the risk of particulate matter entering the detector box 200 to a certain extent before and during assembly, which is crucial to keeping the detector 500 clean and accurate. The design of the small diameter at the second end also takes into account the thickness limit of the detector box 200. Since the thickness of the detector box 200 is fixed, the small diameter design needs to ensure that it will not interfere with the detector 500 during assembly, while ensuring that nitrogen can smoothly enter the interior of the detector box 200.

[0059] In addition, since the system may contain multiple interfaces and components such as impellers, in order to maintain the unity and compatibility of the system, the inner diameter of the outer interface (i.e., the first end) is designed to be larger. This can ensure smooth docking with other interfaces and other components of the external inflation pipeline, reducing the complexity of installation and debugging.

[0060] According to an embodiment of the present invention, the first interface 411 and the second interface 412 are provided with sealing grooves that cooperate with each other, one of which is provided with a positioning protrusion, and the other is provided with a groove that cooperates with the positioning protrusion.

[0061] In this embodiment, on the mating surfaces of the first interface 411 and the second interface 412, one of the interfaces is designed to have a positioning protrusion, and the other interface is correspondingly provided with a groove that matches the positioning protrusion. When the two interfaces are docked, the positioning protrusion will naturally slide into the groove to achieve 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.

[0062] The matching design of the positioning protrusion and the groove can ensure that the first interface 411 and the second interface 412 can be accurately aligned when docking, avoiding problems such as air leakage or poor sealing caused by position deviation. The positioning design makes the docking process of the interface more intuitive and simple, reduces the difficulty and cost of installation, and improves installation efficiency.

[0063] According to one embodiment of the present invention, referring to Figure 3 As shown, a threaded section 413 is provided at one end of the first interface 411 away from the second interface 412 , and the first interface 411 is threadedly connected to the external inflation pipeline via the threaded section 413 .

[0064] It is understandable that the first interface 411 is threadedly connected to the external gas charging pipeline through the threaded section 413, and the threaded connection can provide a tight and reliable connection method. By rotating the first interface 411, the threaded section 413 can be gradually screwed into the corresponding thread of the external gas charging pipeline to form a tight seal. This sealing method helps to prevent nitrogen leakage during transmission and ensure the stability of 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.

[0065] According to one embodiment of the present invention, referring to Figure 4 As shown, the first air inlet interface 310 is connected to the filter wheel 300 through an air guide channel 320 , and the air guide channel 320 is provided with at least one step portion 321 .

[0066] It is understandable that the air guide channel 320 is the only way for nitrogen to flow from the air inlet interface to the inside of the filter wheel 300. Its design has an important impact on the stability of the airflow and the impact on the cavity. When nitrogen passes through the air guide channel 320 at a high speed, the step portion 321 can serve as a buffer to slow down the flow rate of the airflow and reduce its kinetic energy. This buffering effect effectively reduces the direct impact of the airflow on the fragile components inside the cavity (such as the film, etc.). Through the buffering effect of the step portion 321, the impact of the airflow on the cavity is reduced, and the overall stability and reliability of the system are improved. The impact and wear on the inside of the cavity are reduced, which helps to extend the service life of the filter wheel 300 and other related components.

[0067] In some embodiments, there may be a plurality of step portions 321 , and the plurality of step portions 321 are disposed at intervals along the extension direction of the air guide channel 320 to improve the buffering effect.

[0068] According to an embodiment of the present invention, a second air outlet 101 for air outlet is disposed on the top of the focusing optical system 10 , and the second air outlet 101 is located above the focusing mirror 100 .

[0069] In this embodiment, the second gas outlet 101 is arranged at the top of the focusing optical system 10 and above the focusing lens 100, and the second gas outlet 101 is arranged above the light shielding tube 102 of the focusing telescope, which ensures that the nitrogen can be discharged from the top of the system in a timely and smooth manner after flowing through the focusing lens 100 and completing its protection task, thereby avoiding the accumulation of nitrogen in the cavity or the formation of a bad airflow cycle. At the same time, the second gas outlet can effectively balance the pressure difference inside the focusing optical system 10, such as during the launch rise period, when the external air pressure drops rapidly, the gas inside the focusing optical system 10 can be effectively discharged quickly.

[0070] According to an 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 communicated with the second air outlet 101 , and the air outlet channel is a labyrinth channel.

[0071] It is understandable that the air outlet channel is set as a maze channel, that is, a plurality of maze partitions are arranged in the channel, or the channel is designed to be disc-shaped, etc., to prevent the generation of new pollutants or the introduction of external pollutants during the discharge of air flow, thereby ensuring ventilation while preventing external pollutants from entering the interior of the focusing optical system 10 through the second air outlet 101 and the air outlet channel.

[0072] According to one embodiment of the present invention, referring to Figure 1 As shown, there are multiple focusing optical systems 10, and each focusing optical system 10 is connected to an external air-filled pipeline.

[0073] In a specific embodiment, the focusing telescope includes two focusing optical systems 10, each of which is connected to an external air-filled pipeline. They can be connected to the same external air-filled pipeline or to different external air-filled pipelines, ensuring that each focusing optical system 10 can be effectively protected.

[0074] According to one embodiment of the present invention, referring to Figure 1 and Figure 5 As shown, a sunshade flip mechanism 103 is provided on the top of the focusing optical system 10, and the sunshade flip mechanism 103 cooperates with the light-shielding tube 102 to form a closed space for sealing and protecting the focusing mirror.

[0075] According to one embodiment of the present invention, referring to Figure 5 As shown, a polyimide film 1021 is pasted on the inner wall of the light-shielding tube 102. Since the interior of the light-shielding tube 102 is a focusing lens, and the light-shielding tube 102 is mainly made of composite materials such as carbon fiber, the degassing rate is usually high. Therefore, in order to avoid the degassing inside the light-shielding tube 102 from polluting the focusing lens, a black polyimide aluminum-plated film 1021 is pasted on the inner surface of the light-shielding tube 102, thereby shielding the carbon fiber material from directly degassing toward the focusing lens in the tube, thereby protecting the focusing lens. The black film is pasted flatly, without leaking glue, holes, or bulging, and the light-shielding tube 102 is required to be degassed before and after pasting.

[0076] According to one embodiment of the present invention, referring to Figure 1 and Figure 5 As shown, the flatness of the top of the sunshade tube 102 and the mounting surface of the sunshade flip mechanism 103 is less than 0.2 mm, so as to ensure that the sunshade flip mechanism 103 and the sunshade tube 102 are in close contact to prevent air leakage and dust migration.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An anti-pollution structure applied to a focusing telescope, characterized in that: include: A focusing optical system, wherein the focusing optical system is provided with a focusing mirror and a detector box; An inflation protection system is provided with a focusing mirror inflation port and a detector inflation port, and the focusing mirror inflation port and the detector inflation port are respectively connected to the focusing mirror and the detector box to inflate protective gas into the focusing mirror and the detector box.

2. The anti-pollution structure for a focusing telescope according to claim 1, characterized in that: A filter wheel is provided at the bottom of the focusing optical system, the focusing mirror is provided at the top of the optical system, the filter wheel is provided with a first air inlet interface, and an external air filling pipeline is connected to the first air inlet interface to inflate the focusing mirror; a shielding box is provided at the bottom of the focusing optical system, the detector box is installed in the shielding box, and the shielding box is provided with a second air inlet interface, and an external air filling pipeline is connected to the second air inlet interface to fill the detector box with protective gas.

3. The anti-pollution structure for a focusing telescope according to claim 2, characterized in that: The shielding box is arranged below the filter wheel, and the shielding box is provided with a first air outlet, and the first air outlet is connected to the filter wheel.

4. The anti-pollution structure for a focusing telescope according to claim 2, characterized in that: The second air inlet interface comprises: A first interface, connected to an external inflation pipeline; The second interface has one end connected to the first interface and the other end connected to the connecting hole of the detector box, and the second interface is a heat-insulating interface.

5. The anti-pollution structure for a focusing telescope according to claim 4, characterized in that: A gap is arranged between the second interface and the connecting hole.

6. The anti-pollution structure for a focusing telescope according to claim 5, characterized in that: The circumferential clearance between the second interface and the connecting hole is 0.3-0.8 mm; And / or, a gap between a mating surface of the second interface and a mating surface of the connecting hole is 0.2-0.5 mm.

7. The anti-pollution structure for a focusing telescope according to claim 4, characterized in that: The second interface includes a first end and a second end that are oppositely disposed, the first end is close to the first interface, the second end is close to the detector box, and a cross-sectional area of ​​the first end is greater than a cross-sectional area of ​​the second end.

8. The anti-pollution structure for a focusing telescope according to claim 4, characterized in that: The first interface and the second interface are provided with sealing grooves that cooperate with each other.

9. The anti-pollution structure for a focusing telescope according to claim 4, characterized in that: A threaded section is provided at one 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.

10. The anti-pollution structure for a focusing telescope according to claim 2, characterized in that: The first air inlet interface is connected to the filter wheel through an air guide channel, and the air guide channel is provided with at least one step portion.

11. The anti-pollution structure for a focusing telescope according to any one of claims 1 to 10, characterized in that: A second air outlet for air outlet is arranged on the top of the focusing optical system, and the second air outlet is located above the focusing mirror.

12. The anti-pollution structure for a focusing telescope according to any one of claims 1 to 10, characterized in that: There are multiple focusing optical systems, and each of the optical systems is connected to an external air-filled pipeline.

13. The anti-pollution structure for a focusing telescope according to any one of claims 1 to 10, characterized in that: A sunshade flipping mechanism is arranged on the top of the focusing optical system, and the sunshade flipping mechanism cooperates with the light-shielding cylinder to form a closed space.

14. The anti-pollution structure for a focusing telescope according to claim 13, characterized in that: The inner wall of the light-shielding tube is pasted with a polyimide film.

15. The anti-pollution structure for a focusing telescope according to claim 13, characterized in that: The flatness of the mounting surface between the top of the light-shielding tube and the sunshade flipping mechanism is less than 0.2 mm.

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