Supporting structure of coaxial two-mirror space optical camera

Abstract

The invention discloses a supporting structure of a coaxial two-mirror space optical camera, which comprises a primary mirror assembly and a bearing tower connected to the primary mirror assembly, and is characterized in that the bearing tower is coaxial with an optical axis; the secondary mirror assembly is supported by the bearing tower; the three flexible supporting structures are uniformly arranged along the circumferential bottom surface of the primary mirror assembly at an angle of 120 degrees, and the flexible supporting structures are used for supporting the whole camera; and the lens barrel is supported at the bottom of the primary lens assembly and is provided with a correction lens gasket. According to the bearing tower connecting structure, the overall thermal stability and structural stability of the camera are improved, and the problems that a truss type structure is difficult to install, low in stability and prone to blocking light are solved; extension lines of geometric center lines of the two symmetrically-arranged supporting legs of each flexible support intersect at one point, three intersection points formed by the supporting legs of the three flexible supports are coplanar, the mass center of the overall structure is located on the plane, a gravity action line passes through the plane, extra torque generated by mass center deviation is avoided, and the overall stability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of space remote sensing, and in particular to a supporting structure of a coaxial two-mirror space optical camera. Background Art

[0002] At present, the space remote sensing optical system is developing towards the direction of long focal length, large width, small size and light weight. Due to the advantages of no chromatic aberration, small size and light weight, the reflective optical system has been officially applied in the space remote sensing system.

[0003] According to the mirror support method, the space camera structure can be mainly divided into three structural forms. The first is the thin-walled connection tube type. This structural form has the characteristics of easy processing and easy installation, but it cannot meet the high rigidity requirements of large space cameras. In addition, the general connection tube also serves as an external light shielding tube, which will reduce the thermal stability of the camera structure. The second is the truss camera structure. The truss camera structure has the characteristics of high specific rigidity and light weight, but this truss structure is generally arranged outside the camera. When the camera is subjected to external mechanical impact, the truss structure will directly affect the support of the reflector, thereby affecting the optical system of the camera. The third is the tower camera structure. The support of the optical elements of the tower camera structure is arranged inside the camera structure, away from the temperature and mechanical environment outside the camera. It has good mechanical stability and thermal stability. In addition, this structure has a high degree of integration, which can realize the integrated design of the reflector support and the internal light shielding tube, and improve the lightweight and integrated design of the space camera.

[0004] Based on the above technical problems, technicians in this field urgently need to develop a support structure for a coaxial two-mirror space optical camera with a compact structure, high lightweight, easy installation and adjustment, small internal stress, no additional bending moment, and overall greater stability. Summary of the invention

[0005] The purpose of the present invention is to provide a supporting structure for a coaxial two-mirror space optical camera which has a compact structure, a high degree of lightness, is easy to assemble and adjust, has a small internal stress, has no additional bending moment, and is more stable overall.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A support structure of a coaxial two-mirror space optical camera of the present invention comprises:

[0008] a primary mirror assembly; and

[0009] A load-bearing tower connected to the primary mirror assembly, wherein the load-bearing tower is coaxial with the optical axis;

[0010] The secondary mirror assembly is supported by the load-bearing tower;

[0011] The support structure also includes:

[0012] Three flexible support structures are evenly arranged at 120° along the circumferential bottom surface of the primary mirror assembly, and the flexible support structures are used to support the entire camera;

[0013] A lens barrel is supported at the bottom of the main mirror assembly, and a correction lens gasket is mounted on the lens barrel.

[0014] Furthermore, the load-bearing tower is supported by carbon fiber material, and the load-bearing tower includes a flange body connected to the load-bearing tower; and

[0015] An annular embedded part connected to the connecting flange body on the load-bearing tower by countersunk bolts, the annular embedded part is coaxial with the optical axis, and three circular bosses protruding 1 mm upward are evenly arranged on the upper surface of the annular embedded part in the circumferential direction, and the secondary mirror assembly is connected to the circular bosses by gaskets;

[0016] Four triangular ribs are fixedly connected to the flange body connected to the load-bearing tower and extend toward the primary mirror assembly, and the four triangular ribs are evenly arranged along the circumference of the flange body connected to the load-bearing tower.

[0017] Furthermore, the triangular rib is configured as an obtuse triangle structure, and the obtuse angle of the triangular rib faces the optical axis;

[0018] The lower ends of the four triangular ribs form a cone, and the cone gradually increases in diameter from top to bottom and extends to the bottom of the load-bearing tower, and the cone is coaxial with the optical axis;

[0019] The lower end of the cone is provided with a flange body for connecting the load-bearing tower, and the upper surface of the flange body for connecting the load-bearing tower is provided with six circular bosses protruding 1 mm upwards arranged in the circumferential direction, and the main mirror assembly is connected to the threaded hole in the center of the circular boss;

[0020] The lower end of the flange body connected to the lower end of the load-bearing tower has a lower annular embedded part connected by a countersunk bolt, the lower annular embedded part is coaxial with the optical axis, and the lower surface of the lower annular embedded part has six circular bosses protruding 1 mm downward and evenly arranged circumferentially, which are connected to the correction mirror gasket.

[0021] Preferably, twelve rounded rectangular grooves sunken by 3.5 mm are evenly arranged along the circumferential direction on the lower surface of the lower end annular embedded part to form a lightweight structure.

[0022] Preferably, the number of the triangular ribs is three or six, which are evenly distributed along the circumference of the connecting flange body on the load-bearing tower, and the obtuse angle of the triangular ribs faces the optical axis.

[0023] Furthermore, the flexible support structure includes two symmetrically arranged legs, the legs are made of titanium alloy TC4, and a plurality of hollow holes are processed on the legs to form a lightweight structure; and

[0024] A connecting platform formed at the upper end of the supporting leg and integrally formed with the supporting leg, the connecting platform being in a quadrilateral structure and having a hole;

[0025] Two leg seats are symmetrically provided at the lower end of the leg, the leg is connected to the external platform through the leg seat, and the two leg seats are connected through an integrally formed connecting rod.

[0026] Furthermore, the hole includes a first hole formed at two ends of the connecting platform; and

[0027] a second hole coaxial with the first hole and formed between two outer first holes; wherein,

[0028] The first hole is configured as a mounting hole, the second hole is configured as an adjustment hole, and the flexible support structure is assembled and fixed to the main mirror assembly through the first hole to fix the entire camera.

[0029] Furthermore, among the three flexible support structures, the extension lines of the geometric center lines of two symmetrically arranged legs intersect at one point, and the three intersection points formed by the legs of the three flexible support structures form a coplane, and the center of mass of the overall structure is located on the coplane determined by the intersection points, so that the line of action of gravity passes through the coplane.

[0030] Further, the secondary mirror assembly includes a secondary mirror back plate; and

[0031] Three secondary mirror spacers evenly distributed on the circumference of the secondary mirror back plate;

[0032] a secondary mirror mounted on the bottom of the secondary mirror back plate;

[0033] A secondary mirror back cover mounted on the secondary mirror back plate;

[0034] The secondary mirror light shielding cover is arranged on the outer side of the secondary mirror back plate.

[0035] Furthermore, the main mirror assembly comprises a main mirror, and the main mirror is provided with a central hole for the load-bearing tower to pass through; and

[0036] A primary mirror back plate supported by the lens barrel;

[0037] A primary mirror core shaft is arranged between the primary mirror and the primary mirror back plate.

[0038] In the above technical solution, the support structure of a coaxial two-mirror space optical camera provided by the present invention has the following beneficial effects:

[0039] The support structure of a coaxial two-mirror space optical camera of the present invention is provided with a load-bearing tower connection structure, which improves the thermal stability and structural stability of the camera as a whole, and avoids the problems of difficult installation, low stability and easy light blocking of a truss-type structure; the Bipod flexible support structure of the present invention has the characteristics of high rigidity, simple structure, light weight, simple assembly, etc., and in the three flexible support structures, the extension lines of the geometric center lines of two symmetrically arranged legs of each flexible support intersect at one point, and the three intersection points formed by the legs of the three flexible supports are coplanar, and the center of mass of the overall structure is located on this plane, and the line of action of gravity passes through the plane, thereby avoiding additional torque caused by the displacement of the center of mass, which causes the support structure to bear additional bending moment, thereby reducing the internal stress of the structure and improving the overall stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0041] Figure 1 This is a schematic diagram of the structure of the coaxial two-lens reflex camera after the whole assembly is completed;

[0042] Figure 2 This is an exploded view of the structure of the coaxial twin-lens reflex camera after the whole assembly is completed;

[0043] Figure 3 A schematic diagram of the connection structure of the primary and secondary mirror bearing towers of the support structure of a coaxial two-mirror space optical camera provided by an embodiment of the present invention;

[0044] Figure 4 A schematic diagram of a connection structure of primary and secondary mirror bearing towers in the form of three ribs in a support structure of a coaxial two-mirror space optical camera provided by an embodiment of the present invention;

[0045] Figure 5 A schematic diagram of a connection structure of a primary and secondary mirror bearing tower in the form of six ribs in a support structure of a coaxial two-mirror space optical camera provided by an embodiment of the present invention;

[0046] Figure 6 A schematic diagram of the coplanar intersection of the extended lines of the center lines of the flexible support structure legs in the support structure of a coaxial two-mirror space optical camera provided by an embodiment of the present invention;

[0047] Figure 7 A schematic diagram of a flexible support structure in a support structure of a coaxial two-mirror space optical camera provided by an embodiment of the present invention.

[0048] Description of reference numerals:

[0049] 1. Secondary mirror assembly; 2. Load-bearing tower; 3. Primary mirror assembly; 4. Flexible support structure; 5. Correction mirror gasket; 6. Lens barrel;

[0050] 101, secondary mirror back plate; 102, secondary mirror gasket; 103, secondary mirror; 104, secondary mirror back cover; 105, secondary mirror hood;

[0051] 201, flange body connected to the upper part of the load-bearing tower; 202, annular embedded parts; 203, triangular rib plate; 204, cone; 205, flange body connected to the lower part of the load-bearing tower; 206, annular embedded parts at the lower end;

[0052] 301, main mirror; 302, main mirror back plate; 303, main mirror core shaft;

[0053] 401, outrigger; 402, connecting platform; 403, hollow hole; 404, hole; 405, outrigger seat; 406, connecting rod; 407, extension line; 408, coplanar; 409, center of mass; 410, line of gravity;

[0054] 40401, first hole; 40402, second hole. DETAILED DESCRIPTION

[0055] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0056] See also Figure 1 to Figure 7 As shown;

[0057] A support structure of a coaxial two-mirror space optical camera of the present invention comprises:

[0058] A primary mirror assembly 3; and

[0059] A load-bearing tower 2 connected to the primary mirror assembly 3, wherein the load-bearing tower 2 is coaxial with the optical axis;

[0060] The secondary mirror assembly 1 is supported by the load-bearing tower 2;

[0061] The support structure also includes:

[0062] Three flexible support structures 4 are evenly arranged at 120° along the circumferential bottom surface of the primary mirror assembly 3, and the flexible support structures 4 are used to support the entire camera;

[0063] A lens barrel 6 is supported at the bottom of the main mirror assembly 3 , and a correction lens gasket 5 is mounted on the lens barrel 6 .

[0064] As a further introduction to this embodiment, the load-bearing tower 2 is supported by carbon fiber materials, and the load-bearing tower 2 includes a load-bearing tower upper connecting flange body 201; and

[0065] An annular embedded part 202 connected to the connecting flange body 201 on the load-bearing tower by countersunk bolts, the annular embedded part 202 is coaxial with the optical axis, and three circular bosses protruding 1 mm upward are evenly arranged on the upper surface of the annular embedded part 202 in the circumferential direction, and the secondary mirror assembly 1 is connected to the circular bosses by gaskets;

[0066] Four triangular ribs 203 are fixedly connected to the flange body 201 on the load-bearing tower and extend toward the primary mirror assembly 3 . The four triangular ribs 203 are evenly arranged along the circumference of the flange body 201 on the load-bearing tower.

[0067] As a further introduction to this embodiment, the triangular rib plate 203 is configured as an obtuse triangle structure, and the obtuse angle of the triangular rib plate 203 faces the optical axis;

[0068] The lower ends of the four triangular ribs 203 form a cone 204, and the cone 204 gradually increases in diameter from top to bottom and extends to the bottom of the load-bearing tower 2, and the cone 204 is coaxial with the optical axis;

[0069] The lower end of the cone 204 is provided with a load-bearing tower lower connecting flange 205, and the upper surface of the load-bearing tower lower connecting flange 205 has six circular bosses 1 mm upwardly protruding arranged in the circumferential direction, and the main mirror assembly 3 is connected to the threaded hole in the center of the circular boss;

[0070] The lower end of the load-bearing tower lower end connecting flange body 205 has a lower end annular embedded part 206 connected by a countersunk bolt, the lower end annular embedded part 206 is coaxial with the optical axis, and the lower surface of the lower end annular embedded part 206 has six circular bosses protruding 1mm downwards and arranged evenly in the circumference, connected to the correction mirror gasket 5. The lower surface of the lower end annular embedded part 206 has six countersunk holes sunk 3mm evenly arranged in the circumference, connected to the main mirror back plate 302 in the main mirror assembly 3 of the coaxial two-mirror system of the present invention;

[0071] As a preferred technical solution of this embodiment, twelve rounded rectangular grooves sunken by 3.5 mm are evenly arranged along the circumferential direction on the lower surface of the lower end annular embedded part 206 to form a lightweight structure.

[0072] As the preferred technical solution of this embodiment, the present invention designs two other forms of load-bearing tower structures. These two types of load-bearing tower structures are generally similar to the above-mentioned load-bearing tower structures, but slightly different in details. The number of triangular ribs 203 is three or six, which are evenly distributed along the circumference of the flange body 201 connected to the load-bearing tower, and the obtuse angle of the triangular ribs 203 faces the optical axis. For the three types of load-bearing towers, the fewer the number of triangular ribs 203 evenly distributed along the circumference of the flange body connected to the load-bearing tower, the lower the rigidity of the load-bearing tower itself, but at the same time, the less the ribs block the light; conversely, the more the number of triangular ribs evenly distributed along the circumference of the flange body connected to the load-bearing tower, the higher the rigidity of the load-bearing tower itself, but at the same time, the higher the ribs block the light; in general design, the number of ribs can be selected according to the requirements of the overall structure, so as to seek the best balance of overall performance.

[0073] As a further introduction to this embodiment, the connecting flange body 201 on the load-bearing tower is provided with 15 countersunk holes and 3 threaded through holes arranged in the circumferential direction. Among the holes opened along the circumferential direction of the connecting flange body 201 on the load-bearing tower, there are three installation threaded holes for connecting the annular embedded part 202. The installation threaded holes of the annular embedded part 202 are arranged 120° along the circumferential direction and staggered with the four triangular ribs 203. Countersunk bolts are installed from bottom to top. The countersunk bolts penetrate the connecting flange body from bottom to top and extend into the annular embedded part 202 at the upper end. The connecting flange body 201 on the load-bearing tower and the annular embedded part 202 at its upper end are provided with three installation threaded holes for connecting the secondary mirror gasket 102 along the circumferential direction. The threaded holes penetrate the annular embedded part 202 and penetrate upward through the three circular bosses on the upper surface.

[0074] The threaded holes for mounting the secondary mirror gasket 102 are arranged 120° along the circumferential direction, and are staggered with the threaded holes for mounting the four triangular ribs 203 and the annular embedded part 202, and cylindrical head bolts are installed from top to bottom; the threaded holes for mounting the secondary mirror gasket 103 have a 1.5mm circular boss protruding downward on the lower surface of the annular embedded part 202, and the boss extends into the countersunk hole of the flange body 205 at the lower end of the load-bearing tower;

[0075] The upper annular embedded part 202 is provided with 6 threaded holes along its circumference for connecting the secondary mirror back cover 104. The threaded holes penetrate the annular embedded part and extend into the connecting flange body 201 at the lower end, but do not penetrate the flange body 201. The threaded holes are arranged in groups of two and are arranged circumferentially at 120°.

[0076] The secondary mirror back cover 104 mounting threaded hole has a 1.5mm circular boss protruding downward on the lower surface of the annular embedded part 202, and the boss extends into the countersunk hole of the connecting flange body 201 on the load-bearing tower; the upper end annular embedded part 202 has 6 threaded holes along its circumference for connecting the secondary mirror and the secondary mirror shade 105, the threaded holes penetrate the annular embedded part and extend into the connecting flange body 205 at the lower end of the load-bearing tower, but do not penetrate the connecting flange body 205 at the lower end of the load-bearing tower, the threaded holes are arranged in groups of two at 120° circumferentially.

[0077] As a further introduction to this embodiment, the coaxial dual-lens reflex camera involved in the present invention is supported by a Bipod flexible support structure 4, wherein the Bipod flexible support structure 4 includes two symmetrically arranged legs 401, wherein the legs 401 are made of titanium alloy TC4, and a plurality of hollow holes 403 are processed on the legs 401 to form a lightweight structure; and

[0078] A connecting platform 402 formed at the upper end of the supporting leg 401 and formed integrally with the supporting leg 401, wherein the connecting platform 402 is in a quadrilateral structure and has a hole 404;

[0079] Two leg seats 405 are symmetrically provided at the lower end of the leg 401 , and the leg 401 is connected to an external platform (such as a satellite platform) through the leg seat 405 , and the two leg seats 405 are connected by an integrally formed connecting rod 406 .

[0080] As a further introduction to this embodiment, the hole 404 includes a first hole 40401 formed at both ends of the connecting platform 402; and

[0081] A second hole 40402 is coaxial with the first hole 40401 and formed between two outer first holes 40401; wherein,

[0082] The first hole 40401 is configured as a mounting hole, and the second hole 40402 is configured as an adjustment hole. The flexible support structure 4 is assembled and fixed to the primary mirror assembly 3 through the first hole 40401 to fix the entire camera. A screw is screwed into the first hole 40401 from bottom to top, and the screw passes through the connection platform 402.

[0083] Three flexible support structures 4 are assembled on the bottom of the coaxial two-mirror camera, and the three flexible support structures 4 are evenly distributed along the circumference of the coaxial two-mirror camera.

[0084] As a further introduction to this embodiment, among the three flexible support structures 4, the extension lines 407 of the geometric center lines of two symmetrically arranged legs 401 intersect at one point, and the three intersection points formed by the legs 401 of the three flexible support structures 4 form a coplanar surface 408, and the center of mass 409 of the overall structure is located at the coplanar surface 408 determined by the intersection points, so that the line of action of gravity 410 passes through the coplanar surface 408.

[0085] As a further introduction to this embodiment, the secondary mirror assembly 1 includes a secondary mirror back plate 101; and

[0086] Three secondary mirror spacers 102 evenly distributed and installed on the circumference of the secondary mirror back plate 101;

[0087] A secondary mirror 103 mounted on the bottom of the secondary mirror back plate 101;

[0088] A secondary mirror back cover 104 mounted on the secondary mirror back plate 101;

[0089] A secondary mirror light shield 105 is provided on the outer side of the secondary mirror back plate 101 .

[0090] The threaded hole for installing the secondary mirror shade 105 has a 1.5 mm circular boss protruding downward on the lower surface of the annular embedded part 202, and the boss extends into the countersunk hole of the flange body 205 at the lower end of the load-bearing tower;

[0091] The flange body 205 at the lower end of the load-bearing tower is provided with three large-diameter countersunk through holes, six medium-diameter countersunk threaded through holes, and six small-diameter threaded through holes arranged along its circumference;

[0092] The lower end annular embedded part 206 has six countersunk holes evenly arranged in the circumferential direction and sunk by 3 mm, and a circular boss with a height of 7 mm protrudes from the upper surface of the annular embedded part and extends into the connecting flange body 205 at the lower end of the load-bearing tower; six threaded holes are provided in the six bosses arranged along the circumferential direction of 60° on the lower surface of the lower end annular embedded part 206, which are connected to the correction lens gasket 5 on the lens group 6 of the coaxial two-mirror optical system, and the threaded holes penetrate the connecting flange body 205 at the lower end of the load-bearing tower, the annular embedded part 206, the correction lens gasket 5 and the lens barrel 6 from top to bottom;

[0093] The six countersunk holes arranged at 60° along the circumferential direction on the lower surface of the lower end annular embedded part 206 are connected to the main mirror back plate 302 through cylindrical head bolts. The cylindrical head bolts penetrate the annular embedded part 206 and the flange body 205 at the lower end of the load-bearing tower from bottom to top and finally extend into the threaded hole in the main mirror back plate 302.

[0094] As a further introduction to this embodiment, the main mirror assembly 3 includes a main mirror 301, and the main mirror 301 is provided with a central hole for the load-bearing tower 2 to pass through; and

[0095] A primary mirror back plate 302 supported by the lens barrel 6;

[0096] A primary mirror core shaft 303 is provided between the primary mirror 301 and the primary mirror back plate 302 .

[0097] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions 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 support structure for a coaxial two-mirror space optical camera, characterized in that: The support structure includes: a primary mirror assembly (3); and A load-bearing tower (2) connected to the primary mirror assembly (3), wherein the load-bearing tower (2) is coaxial with the optical axis; The secondary mirror assembly (1) is supported by the load-bearing tower (2); The support structure also includes: Three flexible support structures (4) are evenly arranged at 120° along the circumferential bottom surface of the primary mirror assembly (3), and the flexible support structures (4) are used to support the entire camera; A lens barrel (6) is supported on the bottom of the main mirror assembly (3), and a correction lens gasket (5) is installed on the lens barrel (6).

2. The supporting structure of a coaxial two-mirror space optical camera according to claim 1, characterized in that: The load-bearing tower (2) is supported by a carbon fiber material, and the load-bearing tower (2) comprises a load-bearing tower upper connecting flange body (201); and an annular embedded part (202) connected to the connecting flange body (201) on the load-bearing tower via countersunk bolts, the annular embedded part (202) being coaxial with the optical axis, and having three circular bosses protruding 1 mm upwards evenly arranged in the circumferential direction on the upper surface of the annular embedded part (202), the secondary mirror assembly (1) being connected to the circular bosses via gaskets; Four triangular ribs (203) are fixedly connected to the flange body (201) on the load-bearing tower and extend toward the primary mirror assembly (3); the four triangular ribs (203) are evenly arranged along the circumference of the flange body (201) on the load-bearing tower.

3. The supporting structure of a coaxial two-mirror space optical camera according to claim 2, characterized in that: The triangular rib plate (203) is configured as an obtuse triangle structure, and the obtuse angle of the triangular rib plate (203) faces the optical axis; The lower ends of the four triangular ribs (203) form a cone (204), and the cone (204) gradually increases in diameter from top to bottom and extends to the bottom of the load-bearing tower (2), and the cone (204) is coaxial with the optical axis; The lower end of the cone (204) is provided with a load-bearing tower lower connecting flange (205), the upper surface of the load-bearing tower lower connecting flange (205) has six circular bosses arranged in the circumferential direction and protruding 1 mm upward, and the primary mirror assembly (3) is connected to a threaded hole at the center of the circular boss; The lower end of the flange body (205) connected to the lower end of the load-bearing tower is provided with a lower end annular embedded part (206) connected by a countersunk bolt, the lower end annular embedded part (206) is coaxial with the optical axis, and the lower surface of the lower end annular embedded part (206) is provided with six circular bosses protruding downward by 1 mm and arranged evenly in the circumferential direction, which are connected to the correction mirror gasket 5.

4. The supporting structure of a coaxial two-mirror space optical camera according to claim 3, characterized in that: The lower surface of the lower end annular embedded part (206) is evenly arranged along the circumferential direction with twelve rounded rectangular grooves sunken by 3.5 mm to form a lightweight structure.

5. The supporting structure of a coaxial two-mirror space optical camera according to claim 3, characterized in that: The number of the triangular ribs (203) is three or six, and they are evenly distributed along the circumference of the flange body (201) connected to the load-bearing tower, and the obtuse angle of the triangular ribs (203) faces the optical axis.

6. The supporting structure of a coaxial two-mirror space optical camera according to claim 1, characterized in that: The flexible support structure (4) comprises two symmetrically arranged legs (401), the legs (401) are made of titanium alloy TC4, and a plurality of hollow holes (403) are processed on the legs (401) to form a lightweight structure; as well as A connecting platform (402) formed at the upper end of the supporting leg (401) and formed integrally with the supporting leg (401), the connecting platform (402) being in a quadrilateral structure, and having a hole (404) formed thereon; Two leg seats (405) are symmetrically provided at the lower end of the leg (401), the leg (401) is connected to the external platform via the leg seats (405), and the two leg seats (405) are connected via an integrally formed connecting rod (406).

7. The supporting structure of a coaxial two-mirror space optical camera according to claim 6, characterized in that: The hole (404) includes a first hole (40401) formed at both ends of the connection platform (402); and A second hole (40402) coaxial with the first hole (40401) and formed between two outer first holes (40401); wherein, The first hole (40401) is configured as a mounting hole, the second hole (40402) is configured as an adjustment hole, and the flexible support structure (4) is assembled and fixed with the main mirror assembly (3) through the first hole (40401) to fix the entire camera.

8. The supporting structure of a coaxial two-mirror space optical camera according to claim 7, characterized in that: In the three flexible support structures (4), the extension lines (407) of the geometric center lines of two symmetrically arranged legs (401) intersect at one point, and the three intersection points formed by the legs (401) of the three flexible support structures (4) form a coplane (408), and the center of mass (409) of the overall structure is located on the coplane (408) determined by the intersection points, so that the line of action of gravity (410) passes through the coplane (408).

9. The supporting structure of a coaxial two-mirror space optical camera according to claim 1, characterized in that: The secondary mirror assembly (1) comprises a secondary mirror back plate (101); and Three secondary mirror gaskets (102) evenly distributed and installed on the circumference of the secondary mirror back plate (101); A secondary mirror (103) mounted on the bottom of the secondary mirror back plate (101); A secondary mirror back cover (104) mounted on the secondary mirror back plate (101); A secondary mirror light shield (105) is arranged outside the secondary mirror back plate (101).

10. The supporting structure of a coaxial two-mirror space optical camera according to claim 7, characterized in that: The main mirror assembly (3) comprises a main mirror (301), wherein the main mirror (301) is provided with a central hole for the load-bearing tower (2) to pass through; and A primary mirror back plate (302) supported by the lens barrel (6); A primary mirror core shaft (303) is arranged between the primary mirror (301) and the primary mirror back plate (302).

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