A rapid alignment mechanism for the secondary mirror of an aerospace camera

Abstract

The present invention discloses a rapid alignment mechanism for a secondary mirror of an aerospace camera, which comprises: a core shaft, a first rotating shaft, a second rotating shaft and a third rotating shaft. One end of the core shaft is connected to an annular gear, and the other end of the core shaft has an interface for mounting a secondary mirror holder. The first rotating shaft is rotatably sleeved on one end of the core shaft close to the positioning ring. The second rotating shaft is rotatably sleeved on the first rotating shaft and is arranged away from the annular gear. The third rotating shaft is rotatably sleeved on the second rotating shaft and is arranged close to the interface. A first wedge-shaped gasket is installed on the end of the first rotating shaft close to the interface, and a second wedge-shaped gasket is installed on the end of the third rotating shaft close to the interface, and the first wedge-shaped gasket is located between the interface and the second wedge-shaped gasket. The first wedge-shaped gasket and the second wedge-shaped gasket are in contact with each other, and the first wedge-shaped gasket abuts against the secondary mirror. The alignment of the present invention is simple, the alignment time is short, it can be reused, and it can reduce the difficulties and complexities brought about by trimming gaskets.

Description

Technical Field

[0001] The present invention relates to the technical field of secondary mirror alignment, and particularly to a rapid alignment mechanism for the secondary mirror of an aerospace camera. Background Art

[0002] An important means of observing celestial bodies is the astronomical telescope. It can be said without exaggeration that without the birth and development of the telescope, there would be no modern astronomy. With the continuous improvement and enhancement of the performance of telescopes in various aspects, astronomy is also experiencing a huge leap, rapidly advancing humanity's understanding of the universe. Telescopes are divided into refracting telescopes, reflecting telescopes, radio telescopes, and many other types. A reflecting telescope refers to a telescope that uses a concave mirror as the objective lens. It has no chromatic aberration, can record the information emitted by celestial bodies within a wide range of visible light, and is relatively easy to manufacture compared to refracting telescopes.

[0003] The secondary mirror is the lens that reflects light to an easily observable position in a reflecting telescope. Since the position and angle of the secondary mirror in the optical system are required to be relatively precise during use, it needs to be installed near the ideal position during alignment.

[0004] Most of the existing secondary mirror position and angle adjustment devices use trimming of secondary mirror gaskets to meet the accuracy requirements of the secondary mirror. Such devices are relatively cumbersome to operate during use, require many trimming times, and have a long alignment time.

[0005] Therefore, those skilled in the art have provided a rapid alignment mechanism for the secondary mirror of an aerospace camera to solve the problems raised in the above background art. Summary of the Invention

[0006] The present invention provides a rapid alignment mechanism for the secondary mirror of an aerospace camera that is simple to align, has a short alignment time, can be reused, and reduces the difficulties and cumbersome processes brought about by trimming gaskets.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A rapid alignment mechanism for the secondary mirror of an aerospace camera, the mechanism comprising:

[0009] A core shaft, one end of the core shaft is connected to an annular gear, the other end of the core shaft has an interface for installing a secondary mirror holder, and a positioning ring protrudes outward near the position of the annular gear on the core shaft; a fixed seat abuts against one side of the positioning ring, and a spring abuts against the other side of the positioning ring;

[0010] A first rotating shaft, the first rotating shaft is rotatably sleeved on one end of the core shaft near the positioning ring;

[0011] A second rotating shaft, which is rotatably sleeved on the first rotating shaft and is arranged away from the annular gear;

[0012] A third rotating shaft, which is rotatably sleeved on the second rotating shaft and is arranged close to the interface;

[0013] A first wedge-shaped gasket is installed on the end of the first rotating shaft close to the interface, and a second wedge-shaped gasket is installed on the end of the third rotating shaft close to the interface, and the first wedge-shaped gasket is located between the interface and the second wedge-shaped gasket. The first wedge-shaped gasket and the second wedge-shaped gasket are in contact with each other, and the first wedge-shaped gasket abuts against the secondary mirror; A cam is installed on the end of the second rotating shaft close to the interface, and a protrusion is provided on the side of the cam close to the second wedge-shaped gasket, and the protrusion abuts against the inner ring of the second wedge-shaped gasket.

[0014] Further, the first rotating shaft is of a hollow structure, and this hollow structure is sleeved on the core shaft body. The end of the first rotating shaft close to the fixed seat protrudes radially outward to form a first annular protrusion. First annular grooves are respectively opened at the edges of the two end faces of the first annular protrusion. One of the first annular grooves is installed on the first support frame through a bearing, and the other first annular groove is installed on the second support frame through a bearing. The top of the second support frame is connected to the top of the first support frame by screws; The inner wall of the first annular protrusion is recessed inward to form a first groove, and the other end of the spring abuts against the bottom of the first groove; A plurality of first convex plates surrounding a ring are evenly distributed on the end of the first rotating shaft close to the interface.

[0015] Further, the bottom end of the first support frame is installed on the support seat, the support seat is arranged on the top surface of the displacement table, the top end of the first support frame has a first positioning ring, a first installation hole is opened in the middle of the first positioning ring, and the core shaft passes through the first installation hole. The other end of the fixed seat is arranged on one side of the first positioning ring close to the annular gear and is connected to the first positioning ring by screws; A first positioning protrusion protrudes outward from the side of the first positioning ring close to the first rotating shaft and extends into the corresponding first annular groove and is rotatably connected to the first annular groove through a bearing.

[0016] Further, the second support frame includes a second positioning ring. A plurality of first L-shaped connecting plates are arranged on the outer wall of the second positioning ring. The first L-shaped connecting plates are connected to the corresponding convex blocks on the outer wall of the first positioning ring by screws. The lowest end of the second positioning ring is connected to the first support frame by a first inclined rod; One end of the second positioning ring extends into the corresponding first annular groove and is rotatably connected to the first annular groove through a bearing.

[0017] Further, the second rotating shaft is of a hollow structure, and the hollow structure is sleeved on the first rotating shaft. An end of the second rotating shaft close to the first support frame protrudes radially outward to form a second annular protrusion. Second annular grooves are respectively formed at positions close to the edges of two end faces of the second annular protrusion. One of the second annular grooves is rotatably connected to the second positioning ring through a bearing, and the other second annular groove is mounted on the third support frame through a bearing.

[0018] Further, the third support frame includes a third positioning ring. A plurality of second L-shaped connecting plates are arranged on an outer wall of the third positioning ring. The second L-shaped connecting plates are connected to bumps on the second positioning ring through screws. The second L-shaped connecting plate at the lowermost end is connected to the first support frame through a second inclined rod. One end of the third positioning ring extends into the corresponding second annular groove and is rotatably connected to the second annular groove through a bearing.

[0019] Further, the third rotating shaft is of a hollow structure, and the hollow structure is sleeved on the second rotating shaft. An end of the third rotating shaft close to the third support frame protrudes radially outward to form a third annular protrusion. Third annular grooves are respectively formed at positions close to the edges of two end faces of the third annular protrusion. One of the third annular grooves is rotatably connected to the third positioning ring through a bearing, and the other third annular groove is mounted on the fourth support frame through a bearing. A plurality of second convex plates surrounding a ring are evenly distributed at an end of the third rotating shaft close to the interface.

[0020] Further, a bottom end of the fourth support frame is mounted on a support seat. A top end of the fourth support frame has a fourth positioning ring. A second mounting hole is formed in a middle of the fourth positioning ring. The third rotating shaft passes through the second mounting hole. A second positioning protrusion protrudes outward from a side surface of the fourth support frame close to the third annular protrusion. The second positioning protrusion extends into the corresponding third annular groove and is rotatably connected to the third annular groove through a bearing. A plurality of third L-shaped connecting plates are arranged at a top of the fourth positioning ring. The third L-shaped connecting plates are respectively connected to corresponding bumps on the third positioning ring through screws.

[0021] Further, one end of the first wedge-shaped gasket has a greater thickness than the other end. A first through hole is formed in a middle of a side surface of the first wedge-shaped gasket. The first through hole is mounted on an annular groove on the first rotating shaft. A plurality of first positioning grooves are evenly distributed outside the first through hole. Each of the first positioning grooves is adapted to a first convex plate. Three first arc-shaped grooves are formed at positions close to the edge of the side surface of the first wedge-shaped gasket.

[0022] Further, one end of the second wedge-shaped gasket has a greater thickness than the other end. The middle part of the side surface of the second wedge-shaped gasket has a second through hole, which is installed on the annular groove of the third rotating shaft. A plurality of second positioning grooves are evenly distributed outside the second through hole, and each second positioning groove is adapted to the corresponding second convex plate. Three second arc grooves are formed near the edge of the side surface of the second wedge-shaped gasket.

[0023] In the above technical solution, a rapid assembly and adjustment mechanism for the secondary mirror of an aerospace camera provided by the present invention has the following beneficial effects:

[0024] 1. During the assembly and adjustment of the secondary mirror of the camera, by rotating the first rotating shaft, the second rotating shaft, and the third rotating shaft, the rotation and translation of the first wedge-shaped gasket and the second wedge-shaped gasket are driven, so as to realize the change of the rotation angle and thickness of the first wedge-shaped gasket and the second wedge-shaped gasket. The mechanism of the present application is driven by a displacement stage to move, and the position of the secondary mirror is adjusted in cooperation.

[0025] 2. It can reduce the time cost consumed by repeatedly trimming the angles and thicknesses of the first wedge-shaped gasket and the second wedge-shaped gasket, and can realize the rapid assembly and adjustment of the secondary mirror in a short time. The mechanism is simple to operate, and by replacing the secondary mirror clamping device, it can meet the needs of assembling and adjusting different forms of secondary mirrors and realize repeated use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0027] Figure 1 Schematic diagram of the locked state of a rapid assembly and adjustment mechanism for the secondary mirror of an aerospace camera provided by an embodiment of the present invention;

[0028] Figure 2 For Figure 1 the cross-sectional view of;

[0029] Figure 3 For Figure 1 the front view of the central core shaft of;

[0030] Figure 4 For Figure 1 the front view of the first wedge-shaped gasket in;

[0031] Figure 5 For Figure 1 the front view of the second wedge-shaped gasket in;

[0032] Figure 6Side view of the fitting of the thickest end of the first wedge-shaped gasket and the thinnest end of the second wedge-shaped gasket of a rapid alignment mechanism for the secondary mirror of an aerospace camera provided by an embodiment of the present invention;

[0033] Figure 7 Side view of the fitting of the thickest ends of the first and second wedge-shaped gaskets of a rapid alignment mechanism for the secondary mirror of an aerospace camera provided by an embodiment of the present invention;

[0034] Figure 8 Front view of the fitting of the thickest end of one wedge-shaped gasket and the thinnest end of the second wedge-shaped gasket of a rapid alignment mechanism for the secondary mirror of an aerospace camera provided by an embodiment of the present invention;

[0035] Figure 9 Front view of the fitting of the thickest ends of the first and second wedge-shaped gaskets of a rapid alignment mechanism for the secondary mirror of an aerospace camera provided by an embodiment of the present invention.

[0036] Explanation of reference numerals:

[0037] 100, mandrel; 101, annular gear; 102, interface; 103, positioning ring; 104, fixed seat; 105, spring;

[0038] 200, first rotating shaft; 201, first wedge-shaped gasket; 202, first annular protrusion; 203, first annular groove; 204, first groove; 205, first convex plate; 206, first through hole; 207, first positioning groove; 208, first arc-shaped groove;

[0039] 300, second rotating shaft; 301, cam; 302, second annular protrusion; 303, second annular groove;

[0040] 400, third rotating shaft; 401, second wedge-shaped gasket; 402, third annular protrusion; 403, third annular groove; 404, second convex plate; 405, second through hole; 406, second positioning groove; 407, second arc-shaped groove;

[0041] 500, first support frame; 501, support seat; 502, displacement table; 503, first mounting hole; 504, first positioning protrusion; 505, first positioning ring;

[0042] 600, second support frame; 601, second positioning ring; 602, first L-shaped connecting plate; 603, first inclined rod;

[0043] 700, third support frame; 701, third positioning ring; 702, second L-shaped connecting plate; 703, second inclined rod;

[0044] 800, Fourth support frame; 801, Second mounting hole; 802, Second positioning projection; 803, Third L-shaped connecting plate; 804, Fourth positioning ring. Detailed implementation

[0045] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further introduced in detail below with reference to the accompanying drawings.

[0046] See Figures 1-3 as shown;

[0047] A rapid alignment mechanism for the secondary mirror of an aerospace camera according to an embodiment of the present invention, the mechanism includes:

[0048] A core shaft 100, an outer wall of one end of the core shaft 100 has an annular gear 101, the other end of the core shaft 100 has an interface 102 for mounting a secondary mirror holder, and a positioning ring 103 protrudes outward near the position of the annular gear 101 on the core shaft 100; a fixed seat 104 abuts against one side of the positioning ring 103, and a spring 105 abuts against the other side of the positioning ring 103; an annular gear groove is provided on the inner wall of the fixed seat 104, and the annular gear groove is meshed and connected with the annular gear 101 on the core shaft 100; the part of the annular gear 101 extending into the fixed seat 104 is meshed with the annular gear groove inside it, and the annular gear 101 can be manually rotated, and after rotation, it is positioned through the annular gear groove. Manually rotate the annular gear 101 on the core shaft 100 to adjust the alignment position;

[0049] A first rotating shaft 200, the first rotating shaft 200 is rotatably sleeved on one end of the core shaft 100 near the positioning ring 103;

[0050] A second rotating shaft 300, the second rotating shaft 300 is rotatably sleeved on the first rotating shaft 200 and is arranged away from the annular gear 101;

[0051] A third rotating shaft 400, the third rotating shaft 400 is rotatably sleeved on the second rotating shaft 300 and is arranged near the interface 102;

[0052] A first wedge-shaped gasket 201 is mounted on the end of the first rotating shaft 200 close to the interface 102. A second wedge-shaped gasket 401 is mounted on the end of the third rotating shaft 400 close to the interface 102, and the first wedge-shaped gasket 201 is located between the interface 102 and the second wedge-shaped gasket 401. The first wedge-shaped gasket 201 and the second wedge-shaped gasket 401 are in contact with each other. The first wedge-shaped gasket 201 abuts against the secondary mirror, and different secondary mirror holders can be replaced according to different forms of secondary mirrors. A cam 301 is mounted on the end of the second rotating shaft 300 close to the interface 102. A protrusion is provided on the side of the cam 301 close to the second wedge-shaped gasket 401, and the protrusion abuts against the inner ring of the second wedge-shaped gasket 401. The rotation of the second rotating shaft 300 drives the cam 301 to rotate, and then the protrusion follows the rotation of the cam 301, causing the second wedge-shaped gasket 401 against which the protrusion abuts to translate.

[0053] Since the first wedge-shaped gasket 201 abuts against the secondary mirror, the distance from the side of the first wedge-shaped gasket 201 in contact with the secondary mirror to the protrusion is fixed at this time. When the second rotating shaft 300 rotates to drive the protrusion to rotate, when the thickness between the second wedge-shaped gasket 401 and the first wedge-shaped gasket 201 is greater than the distance between the protrusion and the first wedge-shaped gasket, under the action of the protrusion, the second wedge-shaped gasket 401 will move to one side to adapt to the distance from the side of the first wedge-shaped gasket 201 in contact with the secondary mirror to the protrusion.

[0054] The rotation of the first rotating shaft 200 drives the first wedge-shaped gasket 201 to rotate, and the third rotating shaft 400 drives the second wedge-shaped gasket 401 to rotate. Different thickness parts of the first wedge-shaped gasket 201 and the second wedge-shaped gasket 402 are in contact, so as to adjust the angle of the secondary mirror against which the first wedge-shaped gasket 201 abuts. The overall assembly and adjustment are simple, the assembly and adjustment time is short, it can be reused, and the difficulties and cumbersome procedures caused by trimming gaskets are reduced.

[0055] See Figures 1-2 as shown;

[0056] The first rotating shaft 200 has a hollow structure, and this hollow structure is sleeved on the main body of the core shaft 100. An end of the first rotating shaft 200 near the fixed seat 104 protrudes radially outward to form a first annular protrusion 202. First annular grooves 203 are respectively formed at positions near the edges of the two end faces of the first annular protrusion 202. One of the first annular grooves 203 is installed on the first support frame 500 through a bearing, and the other first annular groove 203 is installed on the second support frame 600 through a bearing. The top of the second support frame 600 is connected to the top of the first support frame 500 by screws; an inner wall of the first annular protrusion 202 is recessed inward to form a first groove 204, and the other end of the spring 105 abuts against the bottom of the first groove 204, so that the first wedge-shaped gasket 201 and the secondary mirror are closely attached; a plurality of first convex plates 205 surrounding a ring are evenly distributed at an end of the first rotating shaft 200 near the interface 102.

[0057] The first rotating shaft 200 is arranged between the first support frame 500 and the second support frame 600 and can rotate along its own axis. The rotation of the first rotating shaft 200 can drive the first wedge-shaped gasket 201 to rotate. There is a gap between the outer wall of the first protrusion 202 and the first support frame 500 and the second support frame 600.

[0058] The bottom end of the first support frame 500 is installed on the support seat 501, and the support seat 501 is arranged on the top surface of the displacement table 502. The displacement table 502 adopts a commercial one-dimensional or multi-dimensional product. By adjusting the displacement table 502, the rapid adjustment of the initial position of the camera by the mechanism of the present application is realized; the top end of the first support frame 500 has a first positioning ring 505. A first mounting hole 503 is formed in the middle of the first positioning ring 505. The core shaft 100 passes through the first mounting hole 503. The other end of the fixed seat 104 is arranged on one side of the first positioning ring 505 near the annular gear 101 and is connected to the first positioning ring 505 by screws; a first positioning protrusion 504 protrudes outward from a side surface of the first positioning ring 505 near the first rotating shaft 200. The first positioning protrusion 504 extends into the corresponding first annular groove 203 and is rotatably connected to the first annular groove 203 through a bearing.

[0059] The first positioning protrusion 504 extends into the first annular groove 203, and the inner wall of the first positioning protrusion 504 is connected to the side wall of the first annular groove 203 near its axis through a bearing. There is a gap between the outer wall of the first positioning protrusion 504 and the side wall of the first annular groove 203 far from its axis.

[0060] The second support frame 600 includes a second positioning ring 601. A plurality of first L-shaped connecting plates 602 are arranged on the outer wall of the second positioning ring 601. The first L-shaped connecting plates 602 are connected to the corresponding bumps on the outer wall of the first positioning ring 505 by screws. The lowermost end of the second positioning ring 601 is connected to the first support frame 500 by a first inclined rod 603. One end of the second positioning ring 601 extends into the corresponding first annular groove 203 and is rotatably connected to the first annular groove 203 through a bearing.

[0061] The second positioning ring 601 extends into the first annular groove 203. The inner wall of the first positioning ring 601 is connected to the side wall close to its axis on the first annular groove 20 through a bearing. There is a gap between the outer wall of the first positioning ring 601 and the side wall far from its axis on the first annular groove 203.

[0062] The second rotating shaft 300 is of a hollow structure. The hollow structure is sleeved on the first rotating shaft 200. The end of the second rotating shaft 300 close to the first support frame 500 protrudes radially outward to form a second annular protrusion 302. Second annular grooves 303 are respectively formed at the edges close to the two end faces of the second annular protrusion 302. One of the second annular grooves 303 is rotatably connected to the second positioning ring 601 through a bearing, and the other second annular groove 303 is installed on the third support frame 700 through a bearing.

[0063] The third support frame 700 includes a third positioning ring 701. A plurality of second L-shaped connecting plates 702 are arranged on the outer wall of the third positioning ring 701. The second L-shaped connecting plates 702 are connected to the bumps on the second positioning ring 601 by screws. The lowermost second L-shaped connecting plate 702 is connected to the first support frame 500 by a second inclined rod 703. One end of the third positioning ring 701 extends into the corresponding second annular groove 303 and is rotatably connected to the second annular groove 303 through a bearing.

[0064] The second positioning ring 601 and the third positioning ring 701 respectively extend into the second annular grooves 303 at both end faces of the second annular protrusion 302. The inner walls of the second positioning ring 601 and the third positioning ring 701 are connected to the inner walls close to their axes on the corresponding second annular grooves 303 through bearings. There are gaps between the outer walls of the second positioning ring 601 and the third positioning ring 701 and the inner walls far from their axes on the corresponding second annular grooves 303.

[0065] The third rotating shaft 400 has a hollow structure, and this hollow structure is sleeved on the second rotating shaft 300. An end of the third rotating shaft 400 near the third support frame 700 protrudes radially outward to form a third annular protrusion 402. Third annular grooves 403 are respectively formed at positions near the edges of the two end faces of the third annular protrusion 402. One of the third annular grooves 403 is rotatably connected to the third positioning ring 701 through a bearing, and the other third annular groove 403 is mounted on the fourth support frame 800 through a bearing; a plurality of second convex plates 404 surrounding a ring are evenly distributed at an end of the third rotating shaft 400 near the interface 102.

[0066] The bottom end of the fourth support frame 800 is mounted on the support base 501. The top end of the fourth support frame 800 has a fourth positioning ring 804. A second mounting hole 801 is formed in the middle of the fourth positioning ring 804. The third rotating shaft 400 passes through the second mounting hole 801. A second positioning protrusion 802 protrudes outward from a side of the fourth support frame 800 near the third annular protrusion 402. The second positioning protrusion 802 extends into the corresponding third annular groove 403 and is rotatably connected to the third annular groove 403 through a bearing; a plurality of third L-shaped connecting plates 803 are arranged at the top of the fourth positioning ring 804, and the plurality of third L-shaped connecting plates 803 are respectively connected to corresponding convex blocks on the third positioning ring 701 through screws.

[0067] The third positioning ring 701 and the fourth positioning ring 804 respectively extend into the third annular grooves 403 at both end faces of the third annular protrusion 402, and the inner walls of the third positioning ring 701 and the fourth positioning ring 804 are connected to the inner walls of the corresponding third annular grooves 403 near their axes through bearings. There is a gap between the outer walls of the third positioning ring 701 and the fourth positioning ring 804 and the inner walls of the corresponding third annular grooves 403 far from their axes.

[0068] The outer walls of the first rotating shaft 200, the second rotating shaft 300, and the third rotating shaft 400 have a reticulated structure to facilitate manual rotation of the first rotating shaft 200, the second rotating shaft 300, and the third rotating shaft 400.

[0069] See Figure 1 、 4 -9 shown;

[0070] One end of the first wedge-shaped gasket 201 has a greater thickness than the other end. The middle of the side surface of the first wedge-shaped gasket 201 has a first through hole 206. The first through hole 206 is mounted on an annular groove on the first rotating shaft 200. A plurality of first positioning grooves 207 are evenly distributed outside the first through hole 206. Each of the first positioning grooves 207 is adapted to the first convex plate 205. Three first arc-shaped grooves 208 are formed at positions near the edge of the side surface of the first wedge-shaped gasket 201.

[0071] One end of the second wedge-shaped gasket 401 has a greater thickness than the other end. The middle part of the side surface of the second wedge-shaped gasket 401 has a second through hole 405. The second through hole 405 is installed on an annular groove on the third rotating shaft 400. A plurality of second positioning grooves 406 are evenly distributed on the outer side of the second through hole 405. Each of the second positioning grooves 406 is adapted to a corresponding second convex plate 404. The size of the second positioning groove 406 is larger than the size of the corresponding second convex plate 404, so that the second wedge-shaped gasket 401 can move along the side surface abutting against the first wedge-shaped gasket 201. Three second arc-shaped grooves 407 are formed at the edge of the side surface of the second wedge-shaped gasket 401.

[0072] The first rotating shaft 200 drives the first wedge-shaped gasket 201 to rotate, and the third rotating shaft 400 drives the second wedge-shaped gasket 401 to rotate, so that different thickness parts between the first wedge-shaped gasket 201 and the second wedge-shaped gasket 401 are fitted together, realizing the rotation and translation of the first wedge-shaped gasket 201 and the second wedge-shaped gasket 401, and realizing the adjustment of the installation angle and position of the secondary mirror by changing the thickness and angle between the first wedge-shaped gasket 201 and the second wedge-shaped gasket 401. The present application can reduce the situation in the prior art that the time cost is affected by the consumption of trimming the angle and thickness of the gasket, can realize the rapid installation and adjustment of the secondary mirror in a short time, is simple to operate, and can be reused.

[0073] During specific operation, first select a suitable secondary mirror holder according to the secondary mirror, and connect the secondary mirror holder to the interface 102 on the core shaft 100; insert a plurality of first positioning grooves 207 on the first wedge-shaped gasket 201 into the corresponding first convex plates 205, insert a plurality of second positioning grooves 406 on the second wedge-shaped gasket 401 into the corresponding second convex plates 404, and the inner ring surface of the second wedge-shaped gasket 402 contacts the protrusion on the cam 301; then use the spring 105 on the core shaft 100 to press the secondary mirror, the first wedge-shaped gasket 201 and the second wedge-shaped gasket 401 onto the main load-bearing structure of the camera; use the multi-dimensional displacement stage 502 to adjust the initial position of the secondary mirror; then by rotating the first rotating shaft 200 and the third rotating shaft 400, drive the rotation of the first wedge-shaped gasket 201 and the second wedge-shaped gasket 401 to realize the change of the gasket angle, and by rotating the second rotating shaft 300, drive the movement of the second wedge-shaped gasket 401 to realize the change of the gasket thickness, and further realize the adjustment of the position of the secondary mirror. The thickness and angle of the first wedge-shaped gasket 201 and the second wedge-shaped gasket 401 can be designed accordingly according to needs to meet the needs of the secondary mirror for different angles and thicknesses.

[0074] Only certain exemplary embodiments of the present invention have been described above by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A rapid alignment mechanism for the secondary mirror of an aerospace camera, characterized in that, The mechanism includes: A mandrel (100), one end of the mandrel (100) is connected to an annular gear (101), the other end of the mandrel (100) has an interface (102) for mounting a secondary mirror holder, and a positioning ring (103) protrudes outward near the annular gear (101) on the mandrel (100); a fixed seat (104) abuts against one side of the positioning ring (103), and a spring (105) abuts against the other side of the positioning ring (103); A first rotating shaft (200) rotatably sleeved on one end of the mandrel (100) near the positioning ring (103); A second rotating shaft (300) rotatably sleeved on the first rotating shaft (200) and arranged away from the annular gear (101); A third rotating shaft (400) rotatably sleeved on the second rotating shaft (300) and arranged near the interface (102); A first wedge-shaped gasket (201) is installed at the end of the first rotating shaft (200) near the interface (102), a second wedge-shaped gasket (401) is installed at the end of the third rotating shaft (400) near the interface (102), and the first wedge-shaped gasket (201) is located between the interface (102) and the second wedge-shaped gasket (401). The first wedge-shaped gasket (201) and the second wedge-shaped gasket (401) are in contact with each other, and the first wedge-shaped gasket (201) abuts against the secondary mirror; a cam (301) is installed at the end of the second rotating shaft (300) near the interface (102), and a protrusion is provided on the side of the cam (301) near the second wedge-shaped gasket (401), and the protrusion abuts against the inner ring of the second wedge-shaped gasket (401).

2. The rapid alignment mechanism for the secondary mirror of an aerospace camera according to claim 1, characterized in that: The first rotating shaft (200) has a hollow structure, and the hollow structure is sleeved on the main body of the mandrel (100). An annular protrusion (202) protrudes radially outward at the end of the first rotating shaft (200) near the fixed seat (104). First annular grooves (203) are respectively provided near the edges of the two end faces of the first annular protrusion (202). One of the first annular grooves (203) is installed on a first support frame (500) through a bearing, and the other first annular groove (203) is installed on a second support frame (600) through a bearing. The top of the second support frame (600) is connected to the top of the first support frame (500) by screws; a first groove (204) is formed by the inner wall of the first annular protrusion (202) recessing inward, and the other end of the spring (105) abuts against the bottom of the first groove (204); a plurality of first convex plates (205) surrounding an annular shape are evenly distributed at the end of the first rotating shaft (200) near the interface (102).

3. The rapid alignment mechanism for the secondary mirror of an aerospace camera according to claim 2, characterized in that: The bottom end of the first support frame (500) is installed on the support base (501), the support base (501) is arranged on the top surface of the displacement table (502), the top end of the first support frame (500) has a first positioning ring (505), a first mounting hole (503) is formed in the middle of the first positioning ring (505), the core shaft (100) passes through the first mounting hole (503), and the other end of the fixed seat (104) is arranged on one side of the first positioning ring (505) close to the annular gear (101) and is connected to the first positioning ring (505) by screws; a first positioning protrusion (504) protrudes outward from the side surface of the first positioning ring (505) close to the first rotating shaft (200), the first positioning protrusion (504) extends into the corresponding first annular groove (203) and is rotatably connected to the first annular groove (203) through a bearing.

4. The rapid alignment mechanism for the secondary mirror of an aerospace camera according to claim 3, characterized in that: The second support frame (600) includes a second positioning ring (601), a plurality of first L-shaped connecting plates (602) are arranged on the outer wall of the second positioning ring (601), the first L-shaped connecting plates (602) are connected to the corresponding convex blocks on the outer wall of the first positioning ring (505) by screws, and the lowermost end of the second positioning ring (601) is connected to the first support frame (500) through a first inclined rod (603); one end of the second positioning ring (601) extends into the corresponding first annular groove (203) and is rotatably connected to the first annular groove (203) through a bearing.

5. The quick installation and adjustment mechanism for the secondary mirror of an aerospace camera according to claim 4, characterized in that: The second rotating shaft (300) has a hollow structure, the hollow structure is sleeved on the first rotating shaft (200), a second annular protrusion (302) protrudes radially outward from the end of the second rotating shaft (300) close to the first support frame (500), second annular grooves (303) are respectively formed at the edges close to the two end faces of the second annular protrusion (302), one of the second annular grooves (303) is rotatably connected to the second positioning ring (601) through a bearing, and the other second annular groove (303) is installed on the third support frame (700) through a bearing.

6. The rapid alignment mechanism of the secondary mirror of an aerospace camera according to claim 5, characterized in that: The third support frame (700) includes a third positioning ring (701), a plurality of second L-shaped connecting plates (702) are arranged on the outer wall of the third positioning ring (701), the second L-shaped connecting plates (702) are connected to the convex blocks on the second positioning ring (601) by screws, and the lowermost second L-shaped connecting plate (702) is connected to the first support frame (500) through a second inclined rod (703); one end of the third positioning ring (701) extends into the corresponding second annular groove (303) and is rotatably connected to the second annular groove (303) through a bearing.

7. The quick alignment mechanism for the secondary mirror of an aerospace camera according to claim 6, characterized in that: The third rotating shaft (400) has a hollow structure, and this hollow structure is sleeved on the second rotating shaft (300). An end of the third rotating shaft (400) close to the third support frame (700) protrudes radially outward to form a third annular protrusion (402). Third annular grooves (403) are respectively formed at positions close to the edges of the two end faces of the third annular protrusion (402). One of the third annular grooves (403) is rotatably connected to the (701) through a bearing, and the other third annular groove (403) is mounted on the fourth support frame (800) through a bearing; A plurality of second convex plates (404) surrounding a ring are evenly distributed at an end of the third rotating shaft (400) close to the interface (102).

8. The rapid alignment mechanism of the secondary mirror of an aerospace camera according to claim 7, characterized in that: The bottom end of the fourth support frame (800) is mounted on the support base (501). The top end of the fourth support frame (800) has a fourth positioning ring (804). A second mounting hole (801) is formed in the middle of the fourth positioning ring (804). The third rotating shaft (400) passes through the second mounting hole (801). A second positioning protrusion (802) protrudes outward from a side of the fourth support frame (800) close to the third annular protrusion (402). The second positioning protrusion (802) extends into the corresponding third annular groove (403) and is rotatably connected to the third annular groove (403) through a bearing; A plurality of third L-shaped connecting plates (803) are arranged on the top of the fourth positioning ring (804). The plurality of third L-shaped connecting plates (803) are respectively connected to corresponding bumps on the third positioning ring (701) through screws.

9. The rapid alignment mechanism for the secondary mirror of an aerospace camera according to claim 2, characterized in that: One end of the first wedge-shaped gasket (201) is thicker than the other end. The middle part of the side surface of the first wedge-shaped gasket (201) has a first through hole (206). The first through hole (206) is mounted on a ring groove on the first rotating shaft (200). A plurality of first positioning grooves (207) are evenly distributed outside the first through hole (206). Each of the first positioning grooves (207) is adapted to the first convex plate (205). Three first arc grooves (208) are formed at positions close to the edge of the side surface of the first wedge-shaped gasket (201).

10. The rapid assembly and adjustment mechanism of the secondary mirror of an aerospace camera according to claim 7, characterized in that: One end of the second wedge-shaped gasket (401) is thicker than the other end. The middle part of the side surface of the second wedge-shaped gasket (401) has a second through hole (405). The second through hole (405) is mounted on a ring groove on the third rotating shaft (400). A plurality of second positioning grooves (406) are evenly distributed outside the second through hole (405). Each of the second positioning grooves (406) is adapted to the corresponding second convex plate (404). Three second arc grooves (407) are formed at positions close to the edge of the side surface of the second wedge-shaped gasket (401).

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