Telescope stray light suppression structure

Abstract

The invention relates to the technical field of space telescopes, in particular to a telescope stray light suppression structure, which breaks through the limitation that a stray light suppression structure is designed on the structure of a telescope traditionally, and is characterized in that a follow-up shading curtain is arranged on a follow-up dome skylight of the telescope and comprises a plurality of shading plates; a light passing area with the same aperture as the telescope exists between the two middle light shielding plates, the adjacent light shielding plates on the two sides of the light passing area are in laminated sliding connection, when the pointing direction of the telescope changes, the light passing area slides along the follow-up dome skylight, and the pointing direction of the light passing area is adjusted by overlapping or unfolding the adjacent light shielding plates. Through the shading plate, an invalid slit between the aperture of the telescope and the follow-up dome skylight is avoided, and stray light is prevented from entering through the slit. According to the invention, stray light outside a view field is effectively inhibited on the premise of not increasing the length of the lens cone of the telescope and the turning radius.

Description

Technical Field

[0001] The invention belongs to the technical field of space telescopes, and in particular relates to a telescope stray light suppression structure. Background Art

[0002] As the observation capabilities of telescopes continue to improve, the demand for the detection of faint celestial bodies and high-resolution observations is gradually increasing; at the same time, fields such as daytime imaging and daytime laser ranging have put forward higher requirements for the telescope's work all day. These requirements make it increasingly important for telescope systems to suppress stray light outside the field of view. When the optical system is imaging the target, when the light outside the field of view is transmitted to the detector through complex optical elements, structural elements, etc., it will directly affect the image signal-to-noise ratio. Severe stray light outside the field of view will submerge the target. Especially in strong light, if the stray light cannot be effectively suppressed, the detector will also be saturated, overloaded, or even damaged. At present, the main methods for suppressing stray light in optical systems include designing stray light suppression structures in the optical path, spraying extinction coatings, and installing aperture stops.

[0003] In addition to optimizing the layout and reasonably selecting optical materials to reduce stray light in the optical design, the entire telescope system basically adopts stray light suppression structures such as light shielding tubes, light shielding hoods and light blocking rings designed in the optical path. The light shielding tube is at the front end of the entire optical system, and a light blocking ring is added inside the light shielding tube. In addition, stray light is suppressed by installing light shielding hoods in the hole of the primary reflector and the secondary reflector. However, when this structural form is faced with the requirement of a larger shielding angle, the length of the light shielding tube needs to be very long, which directly increases the weight and turning radius of the telescope. At the same time, for telescopes used in strong skylight scenes such as daytime, the ability of traditional light shielding tubes to eliminate stray light is not outstanding, and it is difficult to meet the needs of high-precision observation. Summary of the invention

[0004] In view of this, the present invention aims to provide a telescope stray light suppression structure, breaking away from the inertial thinking of designing a stray light suppression structure on a telescope structure, and innovatively designs a stray light suppression structure on a telescope follow-up dome. Through a follow-up blackout curtain, the skylight light transmission area of ​​the traditional follow-up dome is reduced to an observation window that is only compatible with the telescope aperture, thereby solving the problem that the traditional follow-up dome has an observation slit that introduces a large amount of stray light and seriously restricts the detection capability of the telescope. Under the premise of not increasing the length of the telescope barrel and the rotation radius, the stray light in the telescope observation process is effectively suppressed.

[0005] To achieve the above object, the technical solution created by the present invention is implemented as follows: The present invention provides a telescope stray light suppression structure, comprising: A shading curtain provided at a telescope's follow-up dome skylight, the shading curtain comprising a plurality of shading plates arranged along the follow-up dome skylight, wherein two shading plates are fixedly connected by a connecting rod, a light-transmitting area adapted to the telescope aperture exists between the two shading plates, and adjacent shading plates on both sides of the light-transmitting area are laminated and slidably connected; When the light-transmitting area slides along the follow-up dome skylight, the shading plates on one side of the light-transmitting area reduce the coverage area of ​​the shading plates on that side by overlapping each other, and the shading plates on the other side of the light-transmitting area increase the coverage area of ​​the shading plates on that side by unfolding each other. The shading plates on both sides of the light-transmitting area can be completely overlapped and hidden in the non-skylight area of ​​the follow-up dome.

[0006] Preferably, the follower dome is provided with a sliding door for opening or closing the skylight.

[0007] Preferably, the blackout curtain is made of aluminum.

[0008] Preferably, adjacent shading plates on both sides of the light-transmitting area are interlocked by a limiting structure to avoid the formation of light-transmitting slits between adjacent shading plates.

[0009] Preferably, two shading plates connected by a connecting rod are provided with pulleys at two vertex corners away from the light-transmitting area; and pulleys are provided at the four vertex corners of the remaining shading plates; A pair of slideways along the sliding direction of the light-passing area are provided on both sides of each shading plate; Adjacent shading plates on both sides of the light-through area are connected by pulleys embedded in the slideway.

[0010] Preferably, a matte coating is provided on the surface of the blackout curtain facing the inner side of the follower dome.

[0011] Preferably, the surface of the blackout curtain facing outward is provided with a high reflectivity coating.

[0012] Preferably, the shading plate includes: a square array formed by periodically arranging transverse ribs and arch ribs, each square is provided with a semi-blind cylindrical ring, the semi-blind cylindrical ring includes a semi-blind cylindrical ring with only an opening on the upper bottom surface and a semi-blind cylindrical ring with only an opening on the lower bottom surface, the semi-blind cylindrical rings with openings on the upper bottom surface and the semi-blind cylindrical rings with openings on the lower bottom surface are alternately distributed, and radial air holes are provided between adjacent semi-blind cylindrical rings.

[0013] Compared with the prior art, the invention can achieve the following beneficial effects: The present invention breaks through the traditional inertial thinking of designing a stray light suppression structure on a telescope structure, and innovatively designs the stray light suppression structure on the telescope's follow-up dome without changing the telescope's optical system, thereby simplifying the telescope's stray light elimination measures. The follow-up blackout curtain on the follow-up dome reduces the skylight light transmission area to match the telescope aperture, thereby avoiding stray light from the observation slit of the follow-up dome during telescope observation, and effectively suppressing stray light without increasing the telescope's lens barrel length and rotation radius.

[0014] The light-shielding curtain of the present invention adopts a laminated sliding design, which can realize synchronous movement of the light-shielding curtain and the telescope pointing, is easy to operate, does not require additional adjustments or complicated operation procedures, and improves the efficiency of the telescope. In addition, the light-shielding curtain is made of lightweight aluminum material, which avoids a significant increase in the weight of the follower dome, reduces the requirements of the follower dome on the drive system, and also reduces the manufacturing and maintenance costs of the light-shielding curtain.

[0015] The shading plate of the present invention is designed with semi-blind cylindrical rings arranged alternately, and air holes are provided between the semi-blind cylindrical rings, which can effectively block stray light and maintain air flow, thereby ensuring that the visual focus of the telescope's observation aperture is not damaged and avoiding wind-induced vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings: Figure 1 is a schematic diagram of the positional relationship between the blackout curtain and the follower dome provided according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of a blackout curtain provided according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of a sunshade provided according to an embodiment of the present invention.

[0017] Reference numerals include: Follow-up dome 1, sliding door 2, blackout curtain 3, first blackout plate 31, second blackout plate 32, third blackout plate 33, fourth blackout plate 34, light-passing area 35, connecting rod 36, slideway 37; Transverse ribs 301 , arch ribs 302 , squares 303 , and semi-blind cylindrical rings 304 . DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the invention clearer, the invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the invention and do not constitute a limitation to the invention. Similar components in different embodiments use associated similar component numbers. In the following embodiments, many detailed descriptions are to enable the invention to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other components, materials, and methods. In some cases, some operations related to the invention are not shown or described in the specification, in order to avoid the core part of the invention being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to form various implementation methods. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a necessary sequence, unless otherwise specified that a certain sequence must be followed.

[0020] In the description of the invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, the meaning of "multiple" is two or more.

[0021] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0023] See also Figure 1 In one embodiment of the present invention, a telescope stray light suppression structure is provided, which mainly addresses the problem that the stray light is serious when the telescope is working during the day, which affects the observation ability of the telescope. The traditional method is to optimize the design of the telescope barrel, which will lead to the problem of increasing the length and rotation radius of the telescope barrel. However, when observing during the day with a strong skylight background, the traditional method has a poor stray light suppression effect and cannot meet the needs of high-precision observation of the telescope during the day. The embodiment of the present invention starts with the telescope's follow-up dome 1, breaks through the inertial thinking of designing a stray light suppression structure on the traditional telescope barrel structure, and sets a blackout curtain 3 at the skylight position of the telescope's follow-up dome 1. Specifically, the servo dome 1 is an auxiliary device for high-precision detection of a space high-precision telescope, which is convenient for tracking and observing the telescope and preventing the external environment from affecting the observation capability of the telescope. The servo dome 1 is usually spherical, and is provided with a skylight that can let light in, and is provided with a sliding door 2 for closing and opening the skylight. During the telescope observation process, the skylight is in an open state, and the servo dome 1 can rotate as a whole with the telescope inside it to track the azimuth of the telescope to prevent the servo dome 1 from affecting the observation aperture of the telescope. The servo dome 1 can greatly reduce the impact of stray light on the telescope, but there will still be an observation slit, causing stray light to be emitted from the invalid observation slit to the telescope. It can be understood that the skylight of the servo dome 1 is to cover the pitch angle of the telescope, so the skylight is usually a light-transmitting area with a pitch angle of 90 degrees, but the skylight area is larger than the telescope aperture, so there will be an invalid observation slit between the telescope aperture and the skylight of the servo dome 1, resulting in a large amount of invalid stray light being emitted to the telescope, which seriously restricts the detection capability of the telescope.

[0024] The telescope stray light suppression structure provided by the embodiment of the present invention mainly includes a blackout curtain 3 arranged on the inner side of the skylight of the follower dome 1, and the blackout curtain 3 is fixed to the follower dome 1 through an internal frame. After the sliding door 2 is opened, the light-transmitting area of ​​the originally open skylight is blocked by the blackout curtain 3, and only an observation window adapted to the telescope aperture is reserved in the telescope pointing area, namely, the light-transmitting area 35. It can be understood that the adaptation to the telescope aperture here means that the area of ​​the telescope aperture is equal to the area of ​​the light-transmitting area 35. In the actual design process, it is not required that the area of ​​the telescope aperture is completely equal to the area of ​​the light-transmitting area 35. A custom design can be performed according to the specific stray light suppression requirements. Please refer to Figure 2 The shade curtain 3 adopts a multi-section stacked folding structure design, which can make the light-transmitting area 35 move with the telescope's pitch movement, and minimize the stray light outside the field of view from entering the entrance pupil of the telescope optical system. Specifically, the shade curtain 3 includes a plurality of shade plates arranged along the arc side of the skylight of the follower dome 1. In extreme cases, these shade plates can be stacked at the bottom or top of the follower dome 1 according to the different pitch angles of the telescope. The specific number of shade plates can be determined according to the size of the follower dome 1. The larger the size of the follower dome 1, the more shade plates there are.

[0025] In the embodiment of the present invention, only four sunshades are taken as an example to introduce the stray light suppression effect of the sunshade curtain 3. Specifically, the sunshade curtain 3 includes a first sunshade plate 31, a second sunshade plate 32, a third sunshade plate 33 and a fourth sunshade plate 34, wherein the first sunshade plate 31 and the third sunshade plate 33 are fixedly connected by a connecting rod 36, the distance between the first sunshade plate 31 and the third sunshade plate 33 is fixed, the two are relatively stationary, and the light-transmitting area 35 between the first sunshade plate 31 and the third sunshade plate 33 is adapted to the aperture of the telescope.

[0026] On one side of the light-transmitting area 35 , the first light shielding plate 31 is slidably connected with the second light shielding plate 32 , that is, the first light shielding plate 31 and the second light shielding plate 32 can slide relative to each other and overlap, or even completely slide and hide to the inner side of the top of the follower dome 1 .

[0027] On the other side of the light-transmitting area 35 , the third light shielding plate 33 is slidably connected with the fourth light shielding plate 34 , that is, the third light shielding plate 33 and the fourth light shielding plate 34 can slide relative to each other and overlap, or even completely slide and hide to the bottom inner side of the follower dome 1 .

[0028] The sliding connection structure of the first shading plate 31 and the second shading plate 32 is completely the same as the sliding connection structure of the third shading plate 33 and the fourth shading plate 34. In the embodiment of the present invention, only the connection relationship between the first shading plate 31 and the second shading plate 32 is described as an example: the first shading plate 31 is provided with pulleys at two vertex corners away from the light-transmitting area 35, and a pair of slideways 37 along the sliding direction of the light-transmitting area 35 are provided at positions corresponding to the pulleys on both sides of the first shading plate 31. Pulleys are provided at the four vertex corners of the second shading plate 32, and a pair of slideways 37 along the sliding direction of the light-transmitting area 35 are provided at positions corresponding to the pulleys on both sides of the second shading plate 32. The pulley of the first shading plate 31 is embedded in the slideway 37 of the second shading plate 32, and the pulley of the second shading plate 32 is embedded in the slideway 37 of the first shading plate 31, so that the first shading plate 31 and the second shading plate 32 can overlap each other, reducing the coverage area of ​​the first shading plate 31 and the second shading plate 32, or even completely hidden in the top of the follower dome 1. In addition, a limited position structure is provided at the proximal end of the slideway 37 of the first shading plate 31 and the second shading plate 32 for interlocking, so as to prevent the pulley from being separated from the slideway 37, and to prevent the formation of a light-transmitting slit between the first shading plate 31 and the second shading plate 32, thereby introducing additional stray light. The sliding connection between the third shading plate 33 and the fourth shading plate 34 is exactly the same as described above, and will not be repeated here.

[0029] In order to adjust the position of the light-transmitting area 35, in the embodiment of the present invention, a driving mechanism is provided on the first light shielding plate 31, and a driving motor with a sprocket installed on the output shaft provides driving power, and the movement of the driving motor is transmitted to the first light shielding plate 31 through the cooperation of the chain and the sprocket, and the first light shielding plate 31 is driven by the driving motor to move along the edge of the skylight of the follower dome 1. In addition, the first light shielding plate 31 can also be driven to move by other methods.

[0030] Specifically, when the elevation angle of the telescope increases, the light-transmitting area 35 needs to move upward following the direction of the telescope. Therefore, the first light shielding plate 31 is driven to move upward along the slide 37 by the driving mechanism. During the upward movement of the first light shielding plate 31 along the slide 37, the first light shielding plate 31 will gradually overlap the lower layer of the second light shielding plate 32. When the first light shielding plate 31 is completely folded to the lower layer of the second light shielding plate 32, the first light shielding plate 31 continues to move upward and pushes the second light shielding plate 32 to move upward together until it is completely hidden in the non-light-transmitting area at the top of the follower dome 1. In this process, the first light shielding plate 31 will also drive the third light shielding plate 33 to move upward through the connecting rod 36, so as to ensure that the light-transmitting area 35 is aligned with the telescope aperture. Since a limiting structure is provided between the third light shielding plate 33 and the fourth light shielding plate 34, the interlocking of the third light shielding plate 33 and the fourth light shielding plate 34 is realized. Under the action of the limiting structure, the third light shielding plate 33 and the fourth light shielding plate 34 are transformed from the overlapping state to the unfolded state. When fully deployed, the third shading plate 33 pulls the fourth shading plate 34 to move upward from the bottom of the follower dome 1. It should be noted that when the light-transmitting area 35 moves to the maximum pitch angle, the lower end of the fourth shading plate 34 is still in the follower dome 1, that is, the fourth shading plate 34 and the lower end of the skylight of the follower dome 1 still overlap, without a light-transmitting slit.

[0031] When the elevation angle of the telescope decreases, the light-transmitting area 35 needs to move downward following the direction of the telescope. Therefore, the first light shielding plate 31 is driven by the driving mechanism to slide out from the lower layer of the second light shielding plate 32. When the first light shielding plate 31 completely slides out from the lower layer of the second light shielding plate 32, the first light shielding plate 31 and the second light shielding plate 32 are completely transformed from the overlapping state to the unfolded state. The first light shielding plate 31 continues to move downward, pulling the second light shielding plate 32 to move downward together until the lower end of the light-transmitting area 35 moves to the lower end of the skylight of the follower dome 1. It should be noted that at this time, the light-transmitting area 35 moves to the minimum elevation angle state, and the upper end of the second light shielding plate 32 is still in the follower dome 1, that is, the second light shielding plate 32 and the upper end of the skylight of the follower dome 1 still overlap, and there is no light-transmitting slit. In this process, the first light shielding plate 31 will also push the third light shielding plate 33 downward through the connecting rod 36, and the third light shielding plate 33 gradually overlaps with the fourth light shielding plate 34. When the third light shading plate 33 completely overlaps with the fourth light shading plate 34, that is, the third light shading plate 33 is completely hidden in the lower layer of the fourth light shading plate 34, the first light shading plate 31 continues to push the third light shading plate 33 and the fourth light shading plate 34 to move downward until the third light shading plate 33 and the fourth light shading plate 34 are completely hidden in the non-light-transmitting area at the bottom of the follower dome 1.

[0032] Since the embodiment of the present invention sets a blackout curtain 3 in the skylight area of ​​the follower dome 1, it will affect the air tightness of the follower dome 1, hinder the air flow, and cause the problem of wind-induced vibration in the light-through area 35 and the telescope field of view aperture, resulting in a decrease in the visual focus in the light-through area 35 and the telescope field of view aperture. Therefore, the present invention optimizes the air permeability of the blackout curtain 3. For details, please refer to Figure 3 Each sunshade in the sunshade curtain 3 is semi-transparent in design. The sunshade is a sandwich structure between two layers of thin-walled skin. Each sunshade includes a transverse rib 301 and an arch rib 302. The transverse rib 301 and the arch rib 302 are periodically arranged to form a grid array. A semi-blind cylindrical ring 304 is provided in each grid 303, that is, a cylindrical concave hole is opened in the grid 303 divided by the transverse rib 301 and the arch rib 302. The semi-blind cylindrical ring 304 includes a semi-blind cylindrical ring with only an upper bottom surface opening, that is, the upper bottom surface of the cylindrical concave hole is not covered with skin, and the lower bottom surface is covered with skin, and a semi-blind cylindrical ring with only a lower bottom surface opening, that is, the lower bottom surface of the cylindrical concave hole is not covered with skin, and the upper bottom surface is covered with skin. In order to take into account both light-shielding and air-permeability, semi-blind cylindrical rings with openings on the upper bottom surface and semi-blind cylindrical rings with openings on the lower bottom surface are alternately distributed, and radial air holes are provided between adjacent semi-blind cylindrical rings, through which a certain amount of air flow is allowed, thereby solving the problem of limited ventilation of a sunshade without air holes and avoiding the problem of directly opening air holes on the sunshade causing stray light to enter the interior of the follow-up dome 1.

[0033] As a preferred embodiment, since the blackout curtain 3 is designed to attenuate stray light, a matte coating can be provided on the inner surface of each shading plate of the blackout curtain 3, specifically by spraying a low-reflectivity black matte paint on the surface of the shading plate facing the inside of the follower dome 1. At the same time, in order to prevent the blackout curtain 3 from absorbing heat, a high-reflectivity coating can be sprayed on the outer surface of all the shading plates to prevent the design of the blackout curtain 3 from affecting the heat dissipation performance of the overall optical system.

[0034] In short, the above description is only a preferred embodiment of this specification and is not intended to limit the protection scope of this specification. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this specification shall be included in the protection scope of this specification.

[0035] The systems, devices, modules or units described in one or more of the above embodiments may be implemented by a computer chip or entity, or by a product having a certain function. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0036] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0037] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0038] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

Claims

1. A telescope stray light suppression structure, characterized in that: include: A shade curtain provided at a telescope's follow-up dome skylight, the shade curtain comprising a plurality of shade plates arranged along the follow-up dome skylight, wherein two shade plates are fixedly connected by a connecting rod, a light-transmitting area adapted to the telescope aperture exists between the two shade plates, and adjacent shade plates on both sides of the light-transmitting area are laminated and slidably connected; When the light-through area slides along the follow-up dome skylight, the shading plates on one side of the light-through area reduce the coverage area of ​​the shading plates on this side by overlapping each other, and the shading plates on the other side of the light-through area increase the coverage area of ​​the shading plates on this side by unfolding each other. The shading plates on both sides of the light-through area can be completely overlapped and hidden in the non-skylight area of ​​the follow-up dome.

2. The telescope stray light suppression structure according to claim 1, characterized in that: The follow-up dome has a sliding door for opening or closing the skylight.

3. The telescope stray light suppression structure according to claim 1, characterized in that: The blackout curtain is made of aluminum.

4. The telescope stray light suppression structure according to claim 1, characterized in that: The adjacent shading plates on both sides of the light-transmitting area are interlocked by a limiting structure to avoid the formation of light-transmitting slits between the adjacent shading plates.

5. The telescope stray light suppression structure according to claim 1, characterized in that: Two shading plates connected by a connecting rod are provided with pulleys at two vertex corners away from the light-passing area; and pulleys are provided at the four vertex corners of the remaining shading plates; A pair of slideways along the sliding direction of the light-passing area are provided on both sides of each shading plate; The adjacent shading plates on both sides of the light-through area are connected by pulleys embedded in the slideway.

6. The telescope stray light suppression structure according to claim 1, characterized in that: The surface of the blackout curtain facing the inner side of the follower dome is provided with a matte coating.

7. The telescope stray light suppression structure according to claim 1, characterized in that: The surface of the blackout curtain facing outward is provided with a high reflectivity coating.

8. The telescope stray light suppression structure according to claim 1, characterized in that: The sunshade includes: a square array formed by periodically arranging transverse ribs and arch ribs, each square is provided with a semi-blind cylindrical ring, the semi-blind cylindrical ring includes a semi-blind cylindrical ring with only an upper bottom surface opening and a semi-blind cylindrical ring with only a lower bottom surface opening, the semi-blind cylindrical rings with upper bottom surface openings and the semi-blind cylindrical rings with lower bottom surface openings are alternately distributed, and radial air holes are provided between adjacent semi-blind cylindrical rings.

Images