Primary mirror taper sleeve bonding optical axis positioning device and positioning method

Abstract

The invention discloses a primary mirror taper sleeve bonding optical axis positioning device and a positioning method, and belongs to the technical field of optical precision instrument installation and adjustment. A plane is processed at the edge part of a reflecting surface of a primary mirror, so that the plane is parallel to an optical axis processing reference plane; bosses are arranged on the upper end face and the lower end face of a positioning tool respectively, the boss on the lower end face makes contact with a marble table face, and the boss on the upper end face is connected with a primary mirror triangular backboard tool. Through the parallelism of an upper end face boss and a lower end face boss, a primary mirror optical axis machining datum plane is transmitted to a primary mirror triangular backboard tool connecting face, so that the primary mirror optical axis machining datum plane is transmitted to a primary mirror three-point flexible joint end face, and the primary mirror triangular backboard tool is fixedly connected with a flexible joint taper sleeve assembly through the bosses arranged on the primary mirror triangular backboard tool. And three-point flexible joint coplanarity is realized. Meanwhile, the end face of the flexible joint is parallel to a primary mirror machining datum plane, perpendicularity of the primary mirror optical axis and the backboard end face is controlled, and datum transmission of the optical axis is achieved. The method is suitable for positioning the bonding optical axis of the primary mirror taper sleeve of the telescopic system.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical precision instrument alignment, and specifically relates to a main mirror cone sleeve bonding optical axis positioning device and a positioning method. Background Art

[0002] There are various forms of the main mirror support structure in the telescopic system of an aerial camera, which can be mainly summarized into the following three types: peripheral support, central support, and three-point back support. However, no matter which support method is adopted, the main mirror and the support structure are basically fixed in a form of glue bonding. The main mirror is the benchmark for system alignment, and the optical axis of the main mirror is the system optical axis. Therefore, during the bonding process of the main mirror and the support structure, a positioning device is required to achieve optical axis positioning.

[0003] The existing patent document published on October 29, 2024: CN118859442A, discloses a main mirror cone sleeve bonding positioning device and method. This method uses inner limit in a double-layer annular groove to achieve the positioning of the installation hole positions on the flexible joint end face. However, this device and method have certain defects and deficiencies, mainly including: First, it is impossible to ensure that the three-point flexible joint end faces are coplanar, which will cause pulling on the mirror after installing the main mirror backplane, resulting in poor mirror surface deformation. Second, it is impossible to ensure that the plane established by the three-point flexible joint end faces is parallel to the machining reference plane on the back of the main mirror, and the reference transfer of the optical axis is not achieved, and the positional relationship between the main mirror optical axis and the triangular backplane installation surface cannot be controlled. In view of the above shortcomings, the present invention provides a bonding device and method that can ensure accurate positioning of the optical axis and the triangular backplane installation surface during the cone sleeve bonding process. Summary of the Invention

[0004] The purpose of the present invention is to provide a main mirror cone sleeve bonding optical axis positioning device and a positioning method, which can achieve the coplanarity of the three-point flexible joint end faces, and at the same time can ensure that the flexible joint end face is parallel to the machining reference plane of the main mirror, control the perpendicularity of the main mirror optical axis and the backplane end face, and achieve the reference transfer of the optical axis.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: The present invention provides a main mirror cone sleeve bonding optical axis positioning device, which includes a marble platform, a positioning tooling, an arc surface positioning block, a plane positioning block, a main mirror, a flexible joint cone sleeve assembly, and a main mirror triangular backplane tooling; The positioning tooling is a closed annular structure composed of two straight lines and two semi-circles, and one arc surface positioning block is installed on each of the two semi-circles, and one plane positioning block is installed on any one of the straight lines; The main mirror is arranged in the positioning tooling through the arc surface positioning block and the plane positioning block; The flexible joint cone sleeve assembly is installed in the corresponding cone hole of the main mirror; The upper and lower end faces of the positioning tooling are respectively provided with 3 bosses. The 3 bosses on the lower end face are used to be placed on the marble platform, and the 3 bosses on the upper end face are used to connect with the main mirror triangular backplane tooling; The main mirror triangular backplane tooling is provided with 6 bosses, namely 3 circular bosses and 3 rectangular bosses. And the 3 circular bosses correspond to the positions of the main mirror conical holes, and the 3 rectangular bosses correspond to the positions of the 3 bosses on the upper end face of the positioning tooling.

[0006] Further, the 3 bosses on the upper end face of the above-mentioned positioning tooling are coplanar, which is plane C, and the flatness is within 0.003 mm; the 3 bosses on the lower end face are coplanar, which is plane D, and the flatness is within 0.003 mm; taking plane D as the reference, the parallelism between plane C and plane D is less than 0.01 mm.

[0007] Further, the above-mentioned positioning tooling and the arc-shaped positioning block and the plane positioning block form a combined body. The perpendicularity of the positioning surface of the combined body to plane D is within 0.01 mm, and the gap between the positioning surface and the outer circle of the main mirror is 0.05 mm.

[0008] Further, the outer circle of the main mirror is matched with the arc-shaped positioning block, and the straight edge of the main mirror is matched with the plane positioning block.

[0009] Further, the materials of the arc-shaped positioning block and the plane positioning block are both polytetrafluoroethylene to avoid damaging the main mirror by the positioning block.

[0010] Further, the back surface of the main mirror is the processed reference plane, which is plane A. And taking plane A as the reference, the perpendicular deviation of the optical axis of the main mirror from plane A does not exceed 30″; A chamfer is provided at the edge of the main mirror reflecting surface and at a position that does not affect the light passing aperture, and the parallelism between the chamfer plane B and plane A is within 0.01 mm.

[0011] Further, the 3 circular bosses are coplanar, which is plane F, and the flatness is within 0.003 mm; the 3 rectangular bosses are coplanar, which is plane E, and the flatness is within 0.003 mm; taking plane E as the reference, the parallelism between plane E and plane F is less than 0.01 mm.

[0012] Further, the device further includes a cone sleeve bonding rod tooling; The cone sleeve bonding rod tooling is used to install the flexible joint cone sleeve assembly in the corresponding conical hole of the main mirror.

[0013] The present invention also provides a positioning method implemented based on the above-mentioned main mirror cone sleeve bonding optical axis positioning device. The method includes the following steps: Step 1: Clean the marble surface and the D plane of the positioning tooling with alcohol. Place the positioning tooling on the marble platform, and the plane D on the lower end face of the positioning tooling contacts the upper end face of the marble platform; Step 2: Install the primary mirror into the positioning tooling, and make the plane B of the primary mirror fully contact with the marble surface; Step 3: Fix the positioning tooling and the marble platform, and transfer the optical axis reference plane of the primary mirror to the plane C of the positioning tooling; Step 4: Install the flexible joint cone sleeve assembly into the corresponding cone hole of the primary mirror by using the cone sleeve bonding rod tooling; Step 5: Fix the primary mirror triangular backplane tooling and the flexible joint cone sleeve assembly; Step 6: Press down the primary mirror triangular backplane tooling until it is confirmed that the plane E is in full contact with the upper end face plane C of the positioning tooling; Step 7: Transfer the optical axis reference plane of the primary mirror to the plane E; Step 8: The plane E and the plane F of the primary mirror backplane tooling are parallel, so that the optical axis reference plane is transferred to the plane F. At the same time, the plane F is in full contact with the end face of the three-point flexible joint cone sleeve assembly, and the coplanarity of the end face of the three-point flexible joint cone sleeve assembly is completed; Step 9: The plane H established by the end face of the three-point flexible joint cone sleeve assembly is parallel to the primary mirror machining reference plane A, and the reference transfer of the perpendicularity between the optical axis of the primary mirror and the plane established by the end face of the three-point flexible joint is completed.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention provides a primary mirror cone sleeve bonding optical axis positioning device and its positioning method. The device includes a primary mirror, a positioning tooling, a combination of an arc-shaped positioning block and a plane positioning block, a flexible joint cone sleeve assembly, and a primary mirror triangular backplane tooling. The flexible joint cone sleeve assembly is installed in the corresponding cone hole of the primary mirror. By machining a plane at the edge of the reflecting surface of the primary mirror, the plane is made parallel to the optical axis machining reference plane; by providing bosses on the upper end face and the lower end face of the positioning tooling respectively, the boss on the lower end face contacts the marble tabletop, and the boss on the upper end face is connected to the primary mirror triangular backplane tooling. Through the parallelism of the boss on the upper end face and the boss on the lower end face, the optical axis machining reference plane of the primary mirror is transferred to the connection surface of the primary mirror triangular backplane tooling, and thus the optical axis machining reference plane of the primary mirror is transferred to the three-point flexible joint end face of the primary mirror.

[0015] Further, by providing a boss on the primary mirror triangular backplane tooling, the connection and fixation with the flexible joint cone sleeve assembly are realized, and the coplanarity of the three-point flexible joint is achieved.

[0016] Further, the plane H established by the end face of the three-point flexible joint cone sleeve assembly is made parallel to the primary mirror back machining reference plane A, and the reference transfer of the perpendicularity between the optical axis and the plane established by the three-point flexible joint end face is realized.

[0017] The present invention is applicable to the positioning of the primary mirror cone sleeve bonding optical axis in the telescopic system of an aerial camera. Description of the Drawings

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the bonding and positioning of the tapered sleeve described in the present invention; Figure 2 It is a schematic diagram of the machining reference plane of the optical axis described in the present invention; Figure 3 It is a schematic diagram of the combination of the positioning tooling and the positioning block described in the present invention; Figure 4 It is a schematic diagram of the boss on the lower end face of the positioning tooling described in the present invention; Figure 5 It is a schematic diagram of the bonding of the tapered sleeve described in the present invention; Figure 6 It is a schematic diagram of the main mirror support structure after installation described in the present invention.

[0020] Among them, 1 represents the marble platform, 2 represents the positioning tooling, 3 represents the arc-shaped positioning block, 4 represents the flat positioning block, 5 represents the main mirror, 6 represents the flexible joint tapered sleeve assembly, 7 represents the tapered sleeve bonding rod tooling, and 8 represents the main mirror triangular backplate tooling. Specific Embodiments

[0021] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, the detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0022] The following further details the specific embodiments of the present invention in conjunction with the drawings and examples. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements can still be made, and these all belong to the protection scope of the present invention.

[0023] Embodiment 1. In combination with Figure 1 , Figure 3 and Figure 5To describe this embodiment, the purpose of this embodiment is to provide a main mirror cone sleeve bonding optical axis positioning device. Through this positioning device, the three-point flexible joint end faces are made coplanar, and at the same time, it can ensure that the flexible joint end face is parallel to the main mirror machining reference plane, control the perpendicularity between the main mirror optical axis and the backplane end face, and achieve the reference transfer of the optical axis.

[0024] The main mirror cone sleeve bonding optical axis positioning device includes a marble platform 1, a positioning tooling 2, an arc surface positioning block 3, a plane positioning block 4, a main mirror 5, a flexible joint cone sleeve assembly 6, and a main mirror triangular backplane tooling 8. The positioning tooling 2 is a closed ring structure composed of two straight lines and two semi - circles. One arc surface positioning block 3 is installed on each of the two semi - circles, and one plane positioning block 4 is installed on any one of the straight lines. The main mirror 5 is arranged in the positioning tooling 2 through the arc surface positioning block 3 and the plane positioning block 4. The flexible joint cone sleeve assembly 6 is installed in the corresponding cone hole of the main mirror 5. The upper and lower end faces of the positioning tooling 2 are respectively provided with 3 bosses. The 3 bosses on the lower end face are used for placing on the marble platform 1, and the 3 bosses on the upper end face are used for connecting with the main mirror triangular backplane tooling 8. The main mirror triangular backplane tooling 8 is provided with 6 bosses, namely 3 circular bosses and 3 rectangular bosses. The 3 circular bosses correspond to the positions of the cone holes of the main mirror 5, and the 3 rectangular bosses correspond to the positions of the 3 bosses on the upper end face of the positioning tooling 2.

[0025] The specific structure of the main mirror cone sleeve bonding optical axis positioning device proposed in this embodiment is as Figure 1 and Figure 5 shown. The positioning device includes a marble platform 1, a positioning tooling 2, an arc surface positioning block 3, a plane positioning block 4, a main mirror 5, a flexible joint cone sleeve assembly 6, a cone sleeve bonding rod tooling 7, and a main mirror triangular backplane tooling 8.

[0026] Among them, as Figure 3 shown, the positioning tooling 2 and the arc surface positioning block 3 and the plane positioning block 4 form a combined body. The positioning tooling 2 is a closed ring structure composed of two straight lines and two semi - circles. One arc surface positioning block 3 is installed on each of the two semi - circles and one plane positioning block 4 is installed on any one of the straight lines.

[0027] Furthermore, the upper and lower end faces of the positioning tooling 2 are respectively provided with 3 bosses. The 3 bosses on the lower end face are used for placing on the marble platform 1, and the 3 bosses on the upper end face are used for connecting with the main mirror triangular backplane tooling 8.

[0028] The main mirror 5 is arranged in the positioning tooling 2 through the arc surface positioning block 3 and the plane positioning block 4, ensuring that the outer circle of the main mirror 5 cooperates with the arc surface positioning block 3 and the straight edge of the main mirror 5 cooperates with the plane positioning block 4.

[0029] As Figure 5 shown, the taper sleeve bonding rod tooling 7 is used to install the flexible joint taper sleeve assembly 6 into the corresponding taper hole of the primary mirror 5. Specifically: The taper sleeve bonding rod tooling 7 and the flexible joint taper sleeve assembly 6 are connected and fixed with screws. Epoxy resin is injected around the outer circumference of the taper sleeve of the flexible joint taper sleeve assembly 6, and the taper sleeve is inserted into the corresponding taper hole of the primary mirror. After insertion, rotate the taper sleeve in the clockwise direction to ensure a uniform glue layer. At the same time, rotate the threaded hole position of the flexible joint to be approximately consistent with the theoretical design position. Repeat the above operation steps to install the second group and the third group of taper sleeve assemblies.

[0030] There are 6 bosses on the primary mirror triangular backplate tooling 8, namely 3 circular bosses and 3 rectangular bosses. The 3 circular bosses correspond to the positions of the taper holes of the primary mirror 5, and the 3 rectangular bosses correspond to the positions of the 3 bosses on the upper end face of the positioning tooling 2, so that the positioning tooling 2 is connected to the 3 rectangular bosses of the primary mirror triangular backplate tooling through the 3 bosses on the upper end face.

[0031] A primary mirror taper sleeve bonding optical axis positioning device proposed in this embodiment includes a primary mirror 5, a positioning tooling 2, a combination of an arc-shaped positioning block 3 and a flat positioning block 4, a flexible joint taper sleeve assembly 6, and a primary mirror triangular backplate tooling 8. The flexible joint taper sleeve assembly 6 is installed in the corresponding taper hole of the primary mirror 5. By machining a flat surface at the edge of the reflecting surface of the primary mirror 5, this flat surface is made parallel to the optical axis machining reference flat surface; by providing bosses on the upper end face and the lower end face of the positioning tooling 2 respectively, the boss on the lower end face contacts the marble tabletop, and the boss on the upper end face is connected to the primary mirror triangular backplate tooling 8. Through the parallelism of the boss on the upper end face and the boss on the lower end face, the optical axis machining reference flat surface of the primary mirror 5 is transmitted to the connection surface of the primary mirror triangular backplate tooling 8, and thus the optical axis machining reference flat surface of the primary mirror 5 is transmitted to the three-point flexible end face of the primary mirror.

[0032] Embodiment 2. Refer to Figures 2 to 6 This embodiment will further specifically describe a primary mirror taper sleeve bonding optical axis positioning device proposed in the above Embodiment 1; As Figure 2 shown, the back surface of the primary mirror 5 is the machining reference flat surface, which is flat surface A. And based on flat surface A, the perpendicular deviation of the optical axis of the primary mirror 5 from flat surface A does not exceed 30″; a chamfer is provided at the edge of the reflecting surface of the primary mirror 5 without affecting the clear aperture, and the parallelism between the chamfer flat surface B and flat surface A is within 0.01 mm, so that the optical axis machining reference of the primary mirror 5 is transmitted to flat surface B, and at the same time the optical axis is perpendicular to flat surface B.

[0033] As Figure 3 and Figure 4As shown, three bosses are machined on each of the upper and lower end faces of the positioning tooling 2. The three bosses on the upper end face are defined as plane C. The three bosses are coplanar, and the flatness is within 0.003 mm. The three bosses on the lower end face are defined as plane D, and the flatness is within 0.003 mm. Taking plane D as the reference, the parallelism between plane C and plane D is less than 0.01 mm.

[0034] Furthermore, the positioning tooling 2, the arc surface positioning block 3 and the plane positioning block 4 form an assembly. The positioning surfaces of the arc surface positioning block 3 and the plane positioning block 4 are machined in combination, so that the perpendicularity between the positioning surface and plane D is within 0.01 mm, and the clearance between the positioning surface and the outer circle of the main mirror 5 is 0.05 mm, enabling accurate positioning of the main mirror 5.

[0035] As Figure 5 shown, the taper sleeve bonding rod tooling 7 and the flexible joint taper sleeve assembly 6 are fixedly connected using screws.

[0036] As Figure 6 shown, six bosses are machined on one side of the weight reduction groove of the main mirror triangular backplate tooling 8. Among them, three circular bosses are coplanar, defined as plane F, and the flatness is within 0.003 mm. The other three rectangular bosses are coplanar, defined as plane E, and the flatness is within 0.003 mm. Taking plane E as the reference, the parallelism between plane E and plane F is less than 0.01 mm.

[0037] Embodiment 3. Combining Figures 1 to 6 to illustrate this embodiment, this embodiment proposes a positioning method implemented based on the main mirror taper sleeve bonding optical axis positioning device described in the above Embodiment 1 or Embodiment 2. The method is as follows: Step 1: Place the positioning tooling on the marble platform, and the plane D on the lower end face of the positioning tooling contacts the upper end face of the marble platform; Step 2: Install the main mirror into the positioning tooling, and the plane B of the main mirror is in full contact with the marble surface; Step 3: Fix the positioning tooling and the marble platform, and transfer the main mirror optical axis reference plane to the plane C of the positioning tooling; Step 4: Use the taper sleeve bonding rod tooling to install the flexible joint taper sleeve assembly into the corresponding taper hole of the main mirror; Step 5: Fix the main mirror triangular backplate tooling and the flexible joint taper sleeve assembly; Step 6: Press down the main mirror triangular backplate tooling until it is confirmed that plane E is in full contact with the plane C on the upper end face of the positioning tooling; Step 7: Transfer the main mirror optical axis reference plane to plane E; Step 8: Plane E and plane F of the main mirror backplate tooling are parallel, so that the optical axis reference plane is transferred to plane F, and at the same time plane F is in full contact with the end face of the three-point flexible joint taper sleeve assembly, completing the coplanarity of the end face of the three-point flexible joint taper sleeve assembly. Step Nine: The plane H established by the end face of the three-point flexible joint cone sleeve assembly is parallel to the machining reference plane A of the primary mirror, completing the reference transfer of the perpendicularity between the optical axis of the primary mirror and the plane established by the end face of the three-point flexible joint cone sleeve assembly.

[0038] In the actual application of this embodiment, as Figure 2 shown, the plane A is the machining reference plane of the optical axis of the primary mirror 5. Machine a plane B at the edge of the reflecting surface of the primary mirror 5 where it does not affect the clear aperture. It is necessary to ensure that the plane B is parallel to the reference plane A within 0.01 mm, and the flatness of the plane B is within 0.01 mm. Further, the optical axis machining reference is transferred to the plane B, and the optical axis of the primary mirror 5 is perpendicular to the plane B.

[0039] As Figure 3 shown, the upper end face of the positioning fixture 2 is designed with three bosses, and the plane defined by the three bosses is defined as the plane C, with a flatness within 0.003 mm. The arc-shaped positioning block 3 is connected and fixed to the positioning fixture 2 by screws. The flat positioning block 4 is connected and fixed to the positioning fixture 2 by screws. The arc-shaped positioning block 3 and the flat positioning block 4 are made of polytetrafluoroethylene material to avoid damaging the mirror body when assembling with the primary mirror 5.

[0040] As Figure 4 shown, the lower end face of the positioning fixture 2 is designed with three bosses, and the plane defined by the three bosses is defined as the plane D, with a flatness within 0.003 mm. For the positioning fixture 2, with the plane D as the reference, the plane C is parallel to the plane D, and the parallelism is within 0.01 mm. The geometric tolerances are ensured by machining.

[0041] Further, the positioning fixture 2, the arc-shaped positioning block 3, and the flat positioning block 4 form a combined body, and the positioning surfaces of the arc-shaped positioning block 3 and the flat positioning block 4 are machined in combination. The perpendicularity of the positioning surface to the plane D is within 0.01 mm, and the clearance between the positioning surface and the outer circle of the primary mirror 5 is 0.05 mm, so as to accurately position the primary mirror 5.

[0042] As Figure 5 shown, use an alcohol cotton ball to clean the upper end face of the marble platform 1 thoroughly. Further, place the positioning fixture 2 horizontally on the marble platform 1, and the plane D of the positioning fixture 2 is in contact with the upper end face of the marble platform 1. Further, install the primary mirror 5 into the positioning fixture 2, ensuring that the outer circle of the primary mirror 5 cooperates with the arc-shaped positioning block 3, and the straight edge of the primary mirror 5 cooperates with the flat positioning block 4. The plane B of the primary mirror 5 is in full contact with the surface of the marble platform 1. Make the plane D of the positioning fixture 2 coplanar with the chamfer B plane of the primary mirror 5.

[0043] Further, apply hot melt adhesive to the outer circle edge of the positioning fixture 2 to fix the positioning fixture 2 and the marble platform 1.

[0044] Further, the optical axis reference plane of the primary mirror 5 is transferred to the plane C of the positioning fixture 2.

[0045] Further, the cone sleeve bonding rod tooling 7 and the flexible joint cone sleeve assembly 6 are connected and fixed with screws. Epoxy resin is injected around the outer circumference of the cone sleeve in the flexible joint cone sleeve assembly, and the cone sleeve is inserted into the corresponding cone hole of the main mirror 5. After insertion, rotate the cone sleeve in the clockwise direction to ensure a uniform glue layer. At the same time, rotate the threaded hole position of the flexible joint to be approximately consistent with the theoretical design position. Repeat the above operation steps to insert the second group and the third group of cone sleeves. At the same time, use a height gauge to detect the height difference of the three components, and ensure that the height difference of the three flexible joint cone sleeve assemblies is within 0.01 mm.

[0046] Further, remove the cone sleeve bonding rod tooling 7.

[0047] Further, the main mirror triangular backplate tooling 8 is machined to be exactly the same as the flight model triangular backplate hole positions.

[0048] As Figure 1 shown, further, trial-assemble the main mirror triangular backplate tooling 8 and the flexible joint cone sleeve assembly 6, and check the corresponding relationship between the threaded holes of the flexible joint and the clearance holes of the main mirror triangular backplate tooling. At this time, the glue has not yet cured (the glue curing takes 24 hours), and relative movement is still possible between the cone sleeve and the main mirror hole. If there is a deviation in the positions of the threaded holes of the flexible joint and the clearance holes of the main mirror backplate tooling, adjust the position of the threaded holes of the flexible joint component in a timely manner until the hole positions of the two are exactly matched. Connect and fix the main backplate tooling 8 and the flexible joint cone sleeve assembly with screws.

[0049] Further, press down the main mirror triangular backplate tooling 8 until it is confirmed that the plane E is in full contact with the upper end face C of the positioning tooling 2, and connect and fix with screws.

[0050] Further, the optical axis reference of the main mirror 5 is transferred to the plane E.

[0051] As Figure 6 shown, the plane E and the plane F of the main mirror triangular backplate tooling 8 are parallel, and further transfer the optical axis reference of the main mirror 5 to the plane F.

[0052] Further, the plane F is in full contact with the end face of the three-point flexible joint cone sleeve assembly 6, realizing the coplanarity of the end faces of the three-point flexible joint cone sleeve assembly 6.

[0053] Furthermore, it realizes that the plane H established by the end faces of the three-point flexible joint cone sleeve assembly 6 is parallel to the back machining reference plane A of the main mirror 5, and realizes the reference transfer of the optical axis perpendicular to the plane established by the three-point flexible joint end faces.

[0054] In the above description, it should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0055] The above are only embodiments of the present invention and do not limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A main mirror cone sleeve bonding optical axis positioning device, characterized in that It includes a marble platform (1), a positioning tooling (2), an arc-shaped positioning block (3), a flat positioning block (4), a primary mirror (5), a flexible joint cone sleeve assembly (6), and a primary mirror triangular backplate tooling (8); The positioning tooling (2) is a closed ring structure composed of two straight lines and two semi-circles. One arc-shaped positioning block (3) is installed on each of the two semi-circles, and one flat positioning block (4) is installed on any one of the straight lines; The primary mirror (5) is arranged in the positioning tooling (2) through the arc-shaped positioning block (3) and the flat positioning block (4); The flexible joint cone sleeve assembly (6) is installed in the corresponding tapered hole of the primary mirror (5); There are 3 bosses respectively on the upper and lower end faces of the positioning tooling (2). The 3 bosses on the lower end face are used to be placed on the marble platform (1), and the 3 bosses on the upper end face are used to connect with the primary mirror triangular backplate tooling (8); There are 6 bosses on the primary mirror triangular backplate tooling (8), namely 3 circular bosses and 3 rectangular bosses. And the 3 circular bosses correspond to the positions of the tapered holes of the primary mirror (5), and the 3 rectangular bosses correspond to the positions of the 3 bosses on the upper end face of the positioning tooling (2).

2. The optical axis positioning device for bonding the main mirror cone sleeve according to claim 1, characterized in that The 3 bosses on the upper end face of the positioning tooling (2) are coplanar, which is plane C, and the flatness is within 0.003 mm; the 3 bosses on the lower end face are coplanar, which is plane D, and the flatness is within 0.003 mm.

3. The optical axis positioning device for bonding the main mirror cone sleeve according to claim 2, wherein Taking plane D as the reference, the parallelism between plane C and plane D is less than 0.01 mm.

4. A main mirror cone sleeve bonding optical axis positioning device according to claim 3, characterized in that, The positioning tooling (2) and the arc-shaped positioning block (3) and the flat positioning block (4) form a combined body. The perpendicularity between the positioning surface of the combined body and plane D is within 0.01 mm, and the gap between the positioning surface and the outer circle of the primary mirror (5) is 0.05 mm.

5. The optical axis positioning device for bonding the main mirror cone sleeve according to claim 4, characterized in that, The outer circle of the primary mirror (5) is matched with the arc-shaped positioning block (3), and the straight edge of the primary mirror (5) is matched with the flat positioning block (4).

6. The optical axis positioning device for bonding the main mirror cone sleeve according to claim 5, characterized in that The materials of the arc-shaped positioning block (3) and the flat positioning block (4) are both polytetrafluoroethylene.

7. A main mirror cone sleeve bonding optical axis positioning device according to claim 1, characterized in that, The back surface of the primary mirror (5) is the processed reference plane, which is plane A. And taking plane A as the reference, the perpendicular deviation between the optical axis of the primary mirror (5) and plane A does not exceed 30″; A chamfer is set at the edge of the reflecting surface of the primary mirror (5) at the part that does not affect the clear aperture. And the parallelism between the chamfer plane B and plane A is within 0.01 mm.

8. A main mirror cone sleeve bonding optical axis positioning device according to claim 1, characterized in that, The 3 circular bosses are coplanar, which is plane F, and the flatness is within 0.003 mm; the 3 rectangular bosses are coplanar, which is plane E, and the flatness is within 0.003 mm; taking plane E as the reference, the parallelism between plane E and plane F is less than 0.01 mm.

9. The optical axis positioning device for bonding the main mirror cone sleeve according to claim 1, wherein, The device also includes a cone sleeve bonding rod tooling (7); The cone sleeve bonding rod tooling (7) is used to install the flexible joint cone sleeve assembly (6) in the corresponding tapered hole of the primary mirror (5).

10. A positioning method for a positioning device of the optical axis of a primary mirror cone sleeve bonding, characterized in that, The positioning device is a primary mirror cone sleeve bonding optical axis positioning device described in any one of claims 1-9. The method is as follows: Step 1: Place the positioning tooling on the marble platform, and make the plane D on the lower end face of the positioning tooling contact with the upper end face of the marble platform; Step 2: Install the primary mirror into the positioning tooling, and make the plane B of the primary mirror fully contact with the marble surface; Step 3: Fix the positioning tooling and the marble platform, and transfer the primary mirror optical axis reference plane to the plane C of the positioning tooling; Step 4: Install the flexible joint cone sleeve assembly in the corresponding cone hole of the primary mirror by using the cone sleeve bonding rod tooling; Step 5: Fix the primary mirror triangular backplane tooling to the flexible joint cone sleeve assembly; Step 6: Press down the primary mirror triangular backplane tooling until it is confirmed that plane E is in full contact with the upper end face plane C of the positioning tooling; Step 7: Transfer the optical axis reference plane of the primary mirror to plane E; Step 8: Plane E and plane F of the primary mirror backplane tooling are parallel, so that the optical axis reference plane is transferred to plane F. At the same time, plane F is in full contact with the end face of the three-point flexible joint cone sleeve assembly, and the coplanarity of the end face of the three-point flexible joint cone sleeve assembly is completed; Step 9: The plane H established by the end face of the three-point flexible joint cone sleeve assembly is parallel to the primary mirror machining reference plane A, and the reference transfer of the perpendicularity between the optical axis of the primary mirror and the plane established by the end face of the three-point flexible joint cone sleeve assembly is completed.

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