Iso-force floating support device and control method for large aperture optical lens detection

Abstract

The present application relates to telescope structure technical field, specifically to a kind of equal force floating support device and control method for large aperture optical lens detection, comprising: frame;Support structure, including multiple support bars, hose and pressure regulating valve;Multiple support bars are evenly installed on the upper surface of frame in circular symmetry direction, for placing and maintaining the position of lens, each support point of lens edge is respectively contacted with the upper end surface of each support bar, and support bar is limited to rotate around Y axis;Hose sequentially passes through the lower end surface of each support bar, for controlling support bar to realize rotation around Y axis;Pressure regulating valve is used to control the air pressure in hose, including air outlet and air inlet, air inlet is connected with gas source, and air outlet is connected with hose.Homogeneous principle is that the pressure of each place is consistent after gas communication, so that the support force that hose exports to each support bar is uniform, to ensure that the discrete support force that each support point of lens edge is acted on is uniform, and the influence that the inconsistent brings to each detection result is eliminated.

Description

Technical Field

[0001] This invention relates to the field of telescope structure technology, and specifically to an equal-force floating support device and control method for testing large-aperture optical lenses. Background Technology

[0002] Ground-based wide-field survey telescopes are a prerequisite for conducting large-scale time-domain surveys, dark energy and dark matter detection, solar physics research, transient space optics research, and galactic measurements.

[0003] Ground-based large-field-of-view survey telescopes all employ large-aperture optical lenses to rapidly converge beams, achieving a large field of view optical system. For example, the LSST telescope has a maximum lens size of 1.64 meters, while the Tianxuan telescope has a maximum lens size of 0.87 meters. A beam of light from a target at infinity is reflected by the primary mirror and then enters the lens to achieve beam convergence and aberration correction. Finally, it is received by a high-sensitivity detector at the image plane, converting the optical signal into an electrical signal, thus obtaining a clear, large-field-of-view image.

[0004] To achieve the expected detection capabilities and measurement accuracy, ensuring that the manufacturing precision of the large-aperture optical lens, a key component of the large-field survey telescope, exceeds the tolerance requirements of the optical system is a crucial prerequisite. Lens manufacturing precision includes both mirror surface accuracy and transmitted wavefront accuracy. In the manufacturing process of large-aperture lenses, during mirror polishing, the concave surface is first polished to optimal surface accuracy. When measuring surface accuracy, the concave surface is used as the reflecting surface, and an interferometer is employed to directly measure the surface shape. Figure 1 As shown; then the convex surface is polished to the required transmitted wavefront. The detection of the transmitted wavefront requires the aid of a standard spherical mirror, such as... Figure 2 As shown. For large-aperture optical lenses, optical processing requires repeated switching between processing and inspection states to guide mirror polishing based on inspection results. Maintaining consistency and stability of inspection results each time is crucial for guiding mirror optical processing, but it is also a challenge, for the following two reasons:

[0005] (1) During lens inspection, the lens can only be supported in the inspection optical path by the lens edge, which results in a poor stress state of the lens. The influence of the edge support structure on the surface accuracy of the lens is mixed with the processed surface, making it difficult to distinguish.

[0006] (2) For large-aperture lenses, there is a strong coupling characteristic between the edge support points, that is, the support points are very sensitive to the surface shape of the mirror, and the slight change in the stress state of each support point will significantly affect the accuracy of the surface shape of the mirror.

[0007] For small-aperture lenses, the support structure has little impact on the mirror surface shape or transmitted wavefront. Therefore, during mirror surface shape or transmitted wavefront testing, the lens optical axis can be placed horizontally within the mount or on a wedge block. However, this placement or testing method is difficult to apply to the testing of large-aperture optical lenses. This is because placing the lens directly within the mount or wedge block results in a significant difference between the lens's testing state and its working state. Using the testing results from this state to guide optical processing can easily introduce a fixed aberration caused by inconsistency. Furthermore, optical processing requires repeated mirror surface testing, which demands high consistency in the test results each time. Simply put, the test results must be highly consistent after repeated disassembly and reassembly. Obviously, this wedge block placement method cannot meet the repeatability requirements of large-aperture optical lenses. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides an equal-force floating support device and control method for the inspection of large-aperture optical lenses, aiming to solve the problem of stable inspection during the fine polishing process of large-aperture optical lens surfaces.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] In a first aspect, a force-equal floating support device for testing large-aperture optical lenses includes:

[0011] frame;

[0012] The support structure includes multiple struts, hoses, and pressure regulating valves;

[0013] Multiple support rods are evenly installed on the upper surface of the frame in a circularly symmetrical direction to place and maintain the position of the lens. Each support point of the lens edge is in contact with the upper end face of each support rod, and the support rod is limited to rotate about the Y-axis.

[0014] The hose passes through the lower end face of each of the support rods in sequence, and is used to control the support rods to rotate around the Y-axis;

[0015] The pressure regulating valve is used to control the air pressure in the hose, and includes an air outlet and an air inlet. The air inlet is connected to an air source, and the air outlet is connected to the hose.

[0016] Preferably, each of the support rods includes:

[0017] A base plate, which is fixedly connected to the frame;

[0018] A rocker arm bracket, which is fixedly connected to the base plate;

[0019] A rocker arm, the rear end of which is hinged to the rocker arm bracket, and the rocker arm is limited to rotation about the Y-axis;

[0020] A support plate is hinged to the front end of the rocker arm, and the support plate is limited to rotation about the Y-axis;

[0021] A push rod support, which is fixedly connected to the base plate;

[0022] A push rod joint, the upper end face of which abuts against the lower surface of the rocker arm;

[0023] A joint connector, one end of which is hinged to the push rod joint, and the joint connector is limited to rotation about the Y-axis;

[0024] A push rod, wherein the push rod is mounted on the push rod support via a linear bearing, and the first end of the push rod is fixedly connected to the other end of the joint joint;

[0025] An air-bearing bracket, the upper end face of which is fixedly connected to the second end of the push rod, and the hose passing through the lower end face of the air-bearing bracket.

[0026] Preferably, the rear end of the rocker arm is hinged to the rocker arm bracket via a pin and a bearing; the support plate is hinged to the front end of the rocker arm via a pin and a bearing; and one end of the joint joint is hinged to the push rod joint via a pin and a bearing.

[0027] Preferably, the rocker arm includes a first segment, a second segment, and a third segment, which are located on the same plane and are connected vertically in sequence; the first end of the first segment is hinged to the rocker arm bracket, the second end of the first segment is fixedly connected to the first end of the second segment, the second end of the second segment is fixedly connected to the first end of the third segment, the second end of the third segment is hinged to the support plate, and the upper end face of the push rod joint abuts against the lower surface of the first segment; wherein, the first segment, the second segment, and the third segment are integrally formed structures.

[0028] Preferably, the air-bearing bracket includes a support portion and a fork-shaped portion, the support portion and the fork-shaped portion are fixedly connected to form a fork-shaped structure, the support portion is fixedly connected to the second end of the push rod, and the hose passes through the fork surface of the fork-shaped portion.

[0029] Preferably, the frame includes: an upper tabletop, a lower tabletop, and six side panels;

[0030] Both the upper platform and the lower platform are hexagonal structures, and a circular hole is provided at the geometric center. The circular hole is used for the transmission wavefront detection of the lens. Multiple support rods are evenly installed on the upper platform in a circularly symmetrical direction.

[0031] The six side panels are connected end to end to form a hexagon, and each side panel has screw holes at both the top and bottom. The edges of the upper and lower platforms are fixedly connected to the screw holes of the side panels by screws.

[0032] Preferably, the frame further includes: 3 stiffening plates;

[0033] The three stiffening plates are placed between the upper and lower platform surfaces, with a 120° interval between them. The upper and lower ends of the three stiffening plates are connected to the upper and lower platform surfaces respectively by screws.

[0034] Preferably, the hose is made of silicone material and is used to compensate for fulcrum position errors by utilizing the elastic deformation of the hose itself.

[0035] Secondly, a control method for an equal-force floating support device for large-aperture optical lens testing includes the following steps;

[0036] (1) Place the lens on the support structure so that each support point on the edge of the lens contacts the upper end face of each support rod.

[0037] (2) Start the pressure regulating valve to inflate the hose. After the hose is inflated, it expands and converts the gas pressure inside the hose into the thrust of the support rod, forming a force acting on the support point of the lens, thus achieving floating support for the lens.

[0038] Thirdly, a control method for an equal-force floating support device for large-aperture optical lens testing includes the following steps;

[0039] (1) Place the lens on the support structure so that each support point on the edge of the lens contacts the support plate of each support rod.

[0040] (2) Start the pressure regulating valve to inflate the hose. After the hose is inflated, it expands and applies a thrust to the air float bracket.

[0041] (3) The air-bearing bracket will transmit the thrust to the push rod, which will be pushed to move longitudinally and transmit the thrust to the rocker arm through the joint joint and the push rod joint, so that the rocker arm will rotate around the Y-axis on the rocker arm bracket, and then the support plate will rotate around the Y-axis on the rocker arm, thereby realizing the floating support of the lens.

[0042] The present invention describes a force-equal floating support device for testing large-aperture optical lenses, the advantages of which are as follows:

[0043] (1) The equal force floating support device uses a pressure regulating valve to pressurize the hose. After the gas is connected, the pressure in the hose is uniform, so that the support force output by the hose to each support rod is uniform. This ensures that the discrete support force acting on each support point at the edge of the lens is uniform, eliminating the influence of inconsistent support force at each support point at the edge of the lens on the test results.

[0044] (2) The equal force floating support device can also overcome the mechanical position error of each discrete support point at the edge of the lens. By using the elastic deformation of the hose itself to compensate for the position error of the support point, it can still maintain the characteristic of uniform output force of each support point. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of existing concave surface shape detection.

[0046] Figure 2 This is a schematic diagram of existing transmitted wavefront detection;

[0047] Figure 3 This is a three-dimensional structural schematic diagram of the equal-force floating support device according to an embodiment of the present invention;

[0048] Figure 4 This is a top view of the equal-force floating support device according to an embodiment of the present invention;

[0049] Figure 5 This is a three-dimensional structural schematic diagram of the support rod according to an embodiment of the present invention;

[0050] Figure 6 This is a cross-sectional view of the support rod according to an embodiment of the present invention;

[0051] Figure 7 This is a schematic diagram of a support rod supporting a lens according to an embodiment of the present invention;

[0052] Figure 8 This is a three-dimensional structural diagram of the framework according to an embodiment of the present invention;

[0053] Figure 9 This is a schematic diagram of the disassembled structure of the framework according to an embodiment of the present invention;

[0054] Figure 10 This is a schematic diagram of the hose compensation fulcrum position error according to an embodiment of the present invention.

[0055] Explanation of reference numerals in the attached figures:

[0056] 1. Frame; 11. Upper tabletop; 12. Lower tabletop; 13. Side panel; 14. Rib plate; 2. Support rod; 21. Base plate; 22. Rocker arm bracket; 23. Rocker arm; 230. First section; 231. Second section; 232. Third section; 24. Support plate; 25. Push rod support; 26. Push rod joint; 27. Joint joint; 28. Push rod; 29. ​​Air float bracket; 210. Linear bearing; 211. Pin; 212. Bearing; 3. Hoses; 4. Pressure regulating valve; 5. Lens; 51. Support point. Detailed Implementation

[0057] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0058] like Figure 3 and Figure 4 As shown, an embodiment of the present invention provides an equal-force floating support device for detecting a large-aperture optical lens 5, comprising: a frame 1; a support structure including multiple support rods 2, a flexible hose 3, and a pressure regulating valve 4; the multiple support rods 2 are uniformly installed on the upper surface of the frame 1 in a circularly symmetrical direction to place and maintain the position of the lens 5, and each support point 51 of the edge of the lens 5 is in contact with the upper end face of each support rod 2, and the support rod 2 is limited to rotating around the Y-axis; the flexible hose 3 passes through the lower end face of each support rod 2 in sequence to control the support rod 2 to achieve rotation around the Y-axis; the pressure regulating valve 4 is used to control the air pressure in the flexible hose 3, including an air outlet and an air inlet, the air inlet being connected to an air source, and the air outlet being connected to the flexible hose 3.

[0059] The control method for the equal-force floating support device for detecting large-aperture optical lenses 5 in the above embodiments includes the following steps;

[0060] (1) Place the lens 5 on the support structure so that each support point 51 on the edge of the lens 5 contacts the upper end face of each support rod 2.

[0061] (2) Start the pressure regulating valve 4 to inflate the hose 3. After the hose 3 is inflated, it expands and converts the gas pressure inside the hose into the thrust of the support rod 2, forming a force acting on the support point 51 of the lens 5, thus achieving floating support for the lens 5.

[0062] The equal-force floating support device uses the pressure regulating valve 4 to inflate the hose 3. The principle that the pressure is consistent throughout the hose 3 after the gas is connected makes the support force output by the hose 3 to each support rod 2 uniform and consistent. This ensures that the discrete support force acting on each support point 51 at the edge of the lens 5 is uniform and consistent, eliminating the impact of inconsistent support force at each support point 51 at the edge of the lens 5 on the results of each test.

[0063] like Figure 10As shown, when the discrete support points at the edge of lens 5 are not on the theoretical plane, the equal-force floating support device can still overcome the mechanical position errors of each discrete support point at the edge of lens 5. By using the elastic deformation of the hose 3 itself to compensate for the position error of the support point, it can still maintain the characteristic of uniform output force at each support point.

[0064] like Figures 5 to 7 As shown, in some embodiments, each support rod 2 includes: a base plate 21, a rocker arm bracket 22, a rocker arm 23, a support plate 24, a push rod support 25, a push rod joint 26, a joint joint 27, a push rod 28, and an air-bearing bracket 29; the base plate 21 is fixedly connected to the frame 1; the rocker arm bracket 22 is fixedly connected to the base plate 21; the rear end of the rocker arm 23 is hinged to the rocker arm bracket 22, and the rocker arm 23 is limited to rotation about the Y-axis; the support plate 24 is hinged to the front end of the rocker arm 23, and the support plate 24 is limited to rotation about the Y-axis. The Y-axis rotates; the push rod support 25 is fixedly connected to the base plate 21; the upper end face of the push rod joint 26 abuts against the lower surface of the rocker arm 23; one end of the joint joint 27 is hinged to the push rod joint 26, and the joint joint 27 limits the rotation around the Y-axis; the push rod 28 is mounted on the push rod support 25 through the linear bearing 210, and the first end of the push rod 28 is fixedly connected to the other end of the joint joint 27; the upper end face of the air float bracket 29 is fixedly connected to the second end of the push rod 28, and the hose 3 passes through the lower end face of the air float bracket 29.

[0065] The control method for the equal-force floating support device for detecting large-aperture optical lenses 5 in the above embodiments includes the following steps;

[0066] (1) Place the lens 5 on the support structure so that each support point 51 on the edge of the lens 5 contacts the support plate 24 of each support rod 2 respectively.

[0067] (2) Start the pressure regulating valve 4 to inflate the hose 3. After the hose 3 is inflated, it expands and applies a thrust to the air float bracket 29.

[0068] (3) The air-floating bracket 29 will transmit the thrust to the push rod 28. The push rod 28 will be pushed to move longitudinally and transmit the thrust to the rocker arm 23 through the joint joint 27 and the push rod joint 26, so that the rocker arm 23 rotates around the Y-axis in the rocker arm bracket 22, and then the support plate 24 rotates around the Y-axis in the rocker arm 23, thereby realizing the floating support of the lens 5.

[0069] In this embodiment, the rocker arm bracket 22, the push rod support 25, and the base plate 21 are connected to the base plate 21 by screws;

[0070] The push rod 28 is used to transmit the gas pressure from the hose 3 to the rocker arm 23, providing a thrust to the rocker arm 23. The lower end of the push rod 28 is connected to the air float bracket 29, and the upper end is connected to the joint connector 27. The push rod 28, together with the lower air float bracket 29 and the upper joint connector 27, is installed in the linear bearing 210. The linear bearing 210 is installed on the upper end of the push rod support 25 by screws. The push rod 28 can slide along the axial direction of the linear bearing 210.

[0071] like Figure 6 As shown, the rear end of the rocker arm 23 is hinged to the rocker arm bracket 22 via a pin 211 and a bearing 212; the support plate 24 is hinged to the front end of the rocker arm 23 via a pin 211 and a bearing 212; and one end of the joint joint 27 is hinged to the push rod joint 26 via a pin 211 and a bearing 212.

[0072] The hinge is achieved by using pin 211 and bearing 212, thereby limiting the rocker arm 23, support plate 24 and joint 27 to rotate only around the Y-axis, thus avoiding uneven support force at each support point 51 on the edge of lens 5 due to rotation of the rocker arm 23, support plate 24 and joint 27 in any direction.

[0073] like Figure 5 As shown, the rocker arm 23 includes a first segment 230, a second segment 231, and a third segment 232. The first segment 230, the second segment 231, and the third segment 232 are located on the same plane and are connected vertically in sequence. The first end of the first segment 230 is hinged to the rocker arm bracket 22, the second end of the first segment 230 is fixedly connected to the first end of the second segment 231, the second end of the second segment 231 is fixedly connected to the first end of the third segment 232, the second end of the third segment 232 is hinged to the support plate 24, and the upper surface of the push rod joint 26 abuts against the lower surface of the first segment 230. The first segment 230, the second segment 231, and the third segment 232 are integrally formed structures.

[0074] The pressure regulating valve 4 is activated to inflate the hose 3. After the hose 3 is inflated, it expands and applies a thrust to the air-bearing bracket 29. The air-bearing bracket 29 transmits the thrust to the push rod 28. The push rod 28 is pushed by the thrust to achieve longitudinal movement and transmits the thrust to the rocker arm 23 through the joint joint 27 and the push rod joint 26. This causes the first section 230, the second section 231, and the third section 232 to rotate around the Y-axis with the rocker arm bracket 22 as the fulcrum. This causes the support plate 24 to rotate around the Y-axis with the third section 232 of the rocker arm 23 as the fulcrum, thereby achieving floating support for the lens 5.

[0075] like Figure 6 As shown, the air-bearing bracket 29 includes a support part and a fork-shaped part. The support part and the fork-shaped part are fixedly connected to form a fork-shaped structure. The support part is fixedly connected to the second end of the push rod 28. The hose 3 passes through the fork surface of the fork-shaped part.

[0076] The hose 3 passes through the fork face of the fork-shaped part, thereby confining the hose 3 to the fork face and preventing the hose 3 from shaking and detaching from the air float bracket 29 during inflation and deflation, which would cause the support point 51 of the support rod 2 on the edge of the lens 5 to differ from other points.

[0077] like Figure 8 and Figure 9 As shown, frame 1 includes: upper table 11, lower table 12 and 6 side panels 13;

[0078] Both the upper platform 11 and the lower platform 12 are hexagonal structures, and a circular hole is provided at the geometric center. The circular hole is used for the transmission wavefront detection of the lens 5. Multiple support rods 2 are evenly installed on the upper platform 11 in a circular symmetrical direction.

[0079] The six side panels 13 are connected end to end to form a hexagon, and each side panel 13 has screw holes at both the top and bottom. The edges of the upper platform 11 and the lower platform 12 are fixedly connected to the screw holes of the side panel 13 by screws.

[0080] To ensure the structural rigidity of frame 1, multiple stiffening plates 14 can be provided on frame 1. The multiple stiffening plates 14 are placed between the upper platform 11 and the lower platform 12, and the upper end face and lower end face of stiffening plate 14 are connected to the upper platform 11 and the lower platform 12 respectively by screws.

[0081] Preferred, such as Figure 9 As shown, frame 1 also includes three stiffening plates 14, which are placed between the upper platform 11 and the lower platform 12. The three stiffening plates 14 are arranged circumferentially and spaced 120° apart. The upper and lower ends of the three stiffening plates 14 are connected to the upper platform 11 and the lower platform 12 respectively by screws. By adding three stiffening plates 14 to frame 1, the structural rigidity of frame 1 can be improved without causing excessive material costs.

[0082] like Figure 10 As shown, the hose 3 is made of silicone material and is used to compensate for the position error of the fulcrum by utilizing the elastic deformation of the hose 3 itself.

[0083] When the support point 51 at the edge of lens 5 is not on the theoretical plane, the hose 3 will undergo elastic deformation to compensate for the fulcrum position error, thereby keeping the support point 51 at the edge of lens 5 on the theoretical plane.

[0084] The above are merely preferred embodiments of the present invention and do not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A force-equal floating support device for testing large-aperture optical lenses, characterized in that, include: frame; The support structure includes multiple struts, hoses, and pressure regulating valves; Multiple support rods are evenly installed on the upper surface of the frame in a circularly symmetrical direction to place and maintain the position of the lens. Each support point of the lens edge is in contact with the upper end face of each support rod, and the support rod is limited to rotate about the Y-axis. The hose passes through the lower end face of each of the support rods in sequence, and is used to control the support rods to rotate around the Y-axis; The pressure regulating valve is used to control the air pressure in the hose, and includes an air outlet and an air inlet. The air inlet is connected to an air source, and the air outlet is connected to the hose. Each of the aforementioned support rods includes: A base plate, which is fixedly connected to the frame; A rocker arm bracket, which is fixedly connected to the base plate; A rocker arm, the rear end of which is hinged to the rocker arm bracket, and the rocker arm is limited to rotation about the Y-axis; A support plate is hinged to the front end of the rocker arm, and the support plate is limited to rotation about the Y-axis; A push rod support, which is fixedly connected to the base plate; A push rod joint, the upper end face of which abuts against the lower surface of the rocker arm; A joint connector, one end of which is hinged to the push rod joint, and the joint connector is limited to rotation about the Y-axis; A push rod is mounted on the push rod support via a linear bearing, and the first end of the push rod is fixedly connected to the other end of the joint joint; An air-bearing bracket, wherein the upper end face of the air-bearing bracket is fixedly connected to the second end of the push rod, and the hose passes through the lower end face of the air-bearing bracket; The air-bearing bracket includes a support part and a fork-shaped part. The support part and the fork-shaped part are fixedly connected to form a fork-shaped structure. The support part is fixedly connected to the second end of the push rod. The hose passes through the fork surface of the fork-shaped part.

2. The equal-force floating support device for testing large-aperture optical lenses according to claim 1, characterized in that, The rear end of the rocker arm is hinged to the rocker arm bracket via a pin and a bearing; the support plate is hinged to the front end of the rocker arm via a pin and a bearing; one end of the joint joint is hinged to the push rod joint via a pin and a bearing.

3. The equal-force floating support device for testing large-aperture optical lenses according to claim 1, characterized in that, The rocker arm includes a first section, a second section, and a third section, which are located on the same plane and are connected vertically in sequence. The first end of the first section is hinged to the rocker arm bracket, the second end of the first section is fixedly connected to the first end of the second section, the second end of the second section is fixedly connected to the first end of the third section, and the second end of the third section is hinged to the support plate. The upper surface of the push rod joint abuts against the lower surface of the first section. The first section, the second section, and the third section are integrally formed.

4. The equal-force floating support device for testing large-aperture optical lenses according to claim 1, characterized in that, The frame includes: an upper tabletop, a lower tabletop, and six side panels; Both the upper platform and the lower platform are hexagonal structures, and a circular hole is provided at the geometric center. The circular hole is used for the transmission wavefront detection of the lens. Multiple support rods are evenly installed on the upper platform in a circularly symmetrical direction. The six side panels are connected end to end to form a hexagon, and each side panel has screw holes at both the top and bottom. The edges of the upper and lower platforms are fixedly connected to the screw holes of the side panels by screws.

5. The equal-force floating support device for large-aperture optical lens inspection according to claim 4, characterized in that, The frame also includes: 3 stiffening plates; The three stiffening plates are placed between the upper and lower platform surfaces, with a 120° interval between them. The upper and lower ends of the three stiffening plates are connected to the upper and lower platform surfaces respectively via screws.

6. The equal-force floating support device for testing large-aperture optical lenses according to claim 1, characterized in that, The hose is made of silicone and is used to compensate for fulcrum position errors by utilizing the elastic deformation of the hose itself.

7. A control method for an equal-force floating support device for testing large-aperture optical lenses, the method being used in the equal-force floating support device according to any one of claims 1-6, characterized in that, Includes the following steps: (1) Place the lens on the support structure so that each support point on the edge of the lens contacts the upper end face of each support rod; (2) Start the pressure regulating valve to inflate the hose. After the hose is inflated, it expands and converts the gas pressure inside the hose into the thrust of the support rod, forming a force acting on the support point of the lens, thus achieving floating support for the lens.

8. A control method for an equal-force floating support device for testing large-aperture optical lenses, the method being used in the equal-force floating support device according to any one of claims 1-6, characterized in that, Includes the following steps: (1) Place the lens on the support structure so that each support point on the edge of the lens contacts the support plate of each support rod; (2) Start the pressure regulating valve to inflate the hose. After the hose is inflated, it expands and applies a thrust to the air float bracket. (3) The air-bearing bracket will transmit the thrust to the push rod, which will be pushed to move longitudinally and transmit the thrust to the rocker arm through the joint joint and the push rod joint, so that the rocker arm will rotate around the Y-axis in the rocker arm bracket, and then the support plate will rotate around the Y-axis in the rocker arm, thereby realizing the floating support of the lens.

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