Self-adaptive optical lens bracket for inhibiting angle deviation

Abstract

The invention discloses a self-adaptive optical lens bracket for inhibiting angle deviation, and belongs to the technical field of precision optical equipment. The problem that in the prior art, an optical lens bracket capable of adapting to angle deviation is lacked is solved. Comprising a vibration isolation platform, a piezoelectric ceramic seat, a positioning frame, an angle measuring device, a central processing chip and a plurality of groups of positioning adjusting assemblies, the piezoelectric ceramic seat and the angle measuring device are fixedly mounted on the vibration isolation platform, and the positioning frame is fixedly mounted on the piezoelectric ceramic seat; the optical lens is arranged in the positioning frame and is positioned and clamped through a plurality of positioning adjusting assemblies arranged in the circumferential direction of the positioning frame. The angle change of the optical lens caused by vibration and thermal expansion can be effectively reduced, and the performance of the optical lens is greatly improved.

Description

Technical Field

[0001] The present invention relates to an adaptive optical mount for suppressing angular deviation, belonging to the technical field of precision optical equipment. Background Art

[0002] In the field of optical engineering, with the iterative development of technologies such as space exploration and quantum sensing, the sub-micro-radian-level stability of optical systems has become the core bottleneck restricting measurement accuracy. Research shows that in application scenarios such as long-baseline interferometric measurement and coherent synthetic aperture, the angular deviation of the optical mirror surface and the system signal-to-noise ratio show an exponential decay relationship. This non-linear response characteristic poses a fundamental challenge to traditional rigid support architectures. The core contradiction restricting optical precision currently stems from the coupling effect of multiple physical fields: the structural dynamic response caused by mechanical vibration excitation will disrupt the static equilibrium state of the mirror pose, and the non-uniform thermal strain caused by the temperature gradient distribution will produce a coupling interference effect with mechanical deformation. More seriously, the time-varying coupling of the force-thermal dual fields will cause the synergistic amplification of errors. This dynamic imbalance characteristic makes the correction efficiency of existing single-field compensation schemes decay exponentially.

[0003] Therefore, there is an urgent need for a new optical mount to reduce the angular deviation of the optical mirror surface, especially the angular deviation caused by the coupling effect of multiple physical fields, improve the stability of the optical mirror, especially the stability against force-thermal coupling, and thus enhance the reliability of the entire optical system. Summary of the Invention

[0004] The present invention is to solve the above technical problems, and further provides an adaptive optical mount for suppressing angular deviation.

[0005] The technical solution adopted by the present invention to solve the above technical problems is as follows: An adaptive optical mount for suppressing angular deviation, comprising a vibration isolation platform, a piezoelectric ceramic seat, a positioning frame, an angle measuring device, a central processing chip and multiple groups of positioning and adjusting components. The piezoelectric ceramic seat and the angle measuring device are both fixedly installed on the vibration isolation platform. The positioning frame is fixedly installed on the piezoelectric ceramic seat. The optical mirror is arranged in the positioning frame and is positioned and clamped by multiple groups of positioning and adjusting components arranged along the circumference of the positioning frame. The positioning and adjusting assembly includes a slider, and a positioning assembly and an adjusting assembly arranged on both sides of the slider relatively. A limiting groove is formed on the slider, and the edge of the optical mirror is slidably installed in the limiting groove. The positioning assembly includes a first linear adjusting mechanism fixedly installed on the slider, a pressure sensor arranged on one side of the optical mirror, and a first connecting member fixedly connected between the output end of the first linear adjusting mechanism and the pressure sensor. The adjusting assembly includes a rotating mechanism, a second linear adjusting mechanism, a first piezoelectric ceramic column and a second connecting member. The second linear adjusting mechanism is rotatably installed on the slider through the rotating mechanism. The first piezoelectric ceramic column is arranged on the other side of the optical mirror, and the second connecting member is fixedly connected between the second linear adjusting mechanism and the first piezoelectric ceramic column. Displacement sensors are arranged inside both the piezoelectric ceramic seat and the first piezoelectric ceramic column. The piezoelectric ceramic seat, the first piezoelectric ceramic column, the displacement sensor, the first linear adjusting mechanism, the second linear adjusting mechanism, the pressure sensor and the angle measuring device are all signal-connected to the central processing chip.

[0006] Further, the piezoelectric ceramic seat includes a mounting seat and a plurality of second piezoelectric ceramic columns. The mounting seat is arranged above the vibration isolation platform, and the mounting seat and the vibration isolation platform are connected by a plurality of second piezoelectric ceramic columns.

[0007] Further, the vibration isolation platform includes a platform main body and a plurality of support blocks evenly distributed at the bottom of the platform main body and fixedly connected to the platform main body. The machining accuracy of the support blocks is higher than that of the platform main body.

[0008] Further, flexible clamping pads are respectively arranged on the pressure sensor and on the surface of the first piezoelectric ceramic column in contact with the optical mirror.

[0009] Further, the flexible clamping pad is made of rubber or plastic.

[0010] Further, both the first linear adjusting mechanism and the second linear adjusting mechanism are linear motors.

[0011] Further, both the first connecting member and the second connecting member are rod-shaped structures.

[0012] Further, the number of the positioning and adjusting assemblies is three groups and they are evenly distributed along the circumferential direction of the optical mirror.

[0013] Further, the inner contour of the positioning frame is adapted to the optical mirror.

[0014] Further, the central processing chip is installed on the piezoelectric ceramic seat.

[0015] The present invention has the following effects compared with the prior art: The optical mirror frame capable of self - adapting to angular deviation in the present invention can be adapted to optical mirrors, which are not limited to lenses such as reflecting mirrors, refracting mirrors, transmitting mirrors, and fast - steering mirrors, as well as infrared lenses in some infrared cameras that need to be installed at different angles according to the change of infrared focal length to ensure the best observation effect.

[0016] The optical mirror frame capable of self - adapting to angular deviation in the present invention can effectively reduce the angular deviation of the optical mirror caused by vibration and / or thermal expansion, especially the angular deviation caused by the coupling action of multiple physical fields, improve the stability of the optical mirror, especially the stability against thermal - mechanical coupling, and further enhance the reliability of the entire optical system.

[0017] The tilt angle of the vibration isolation platform is monitored in real - time by an angle measuring device and transmitted to the central processing chip. The piezoelectric ceramic seat is controlled by the central processing chip to elongate and shorten, and real - time feedback is carried out through the displacement sensor inside it to form a closed - loop control.

[0018] The positioning and position adjustment of the optical mirror are realized through a positioning and adjusting component. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. 1 is a first three - dimensional structural schematic diagram of an adaptive optical mirror frame for suppressing angular deviation according to the present invention; Figure 2 FIG. 2 is a second three - dimensional structural schematic diagram of an adaptive optical mirror frame for suppressing angular deviation according to the present invention; Figure 3 FIG. 3 is a side - view schematic diagram of an adaptive optical mirror frame for suppressing angular deviation according to the present invention; Figure 4 FIG. 4 is an enlarged schematic diagram of the positioning and adjusting component; Figure 5 FIG. 5 is a three - dimensional structural schematic diagram of the piezoelectric ceramic seat; Figure 6 FIG. 6 is a three - dimensional structural schematic diagram of the vibration isolation platform.

[0020] In the figure: 100, optical mirror; 1, vibration isolation platform; 11, platform main body; 12, support block; 2, piezoelectric ceramic seat; 21, mounting seat; 22, second piezoelectric ceramic column; 3, positioning frame; 4, angle measuring device; 5, central processing chip; 6, positioning and adjusting component; 61, slider; 62, first linear adjusting mechanism; 63, pressure sensor; 64, first connecting piece; 65, rotating mechanism; 66, second linear adjusting mechanism; 67, first piezoelectric ceramic column; 68, second connecting piece; 69, flexible clamping pad. DETAILED DESCRIPTION OF THE INVENTION

[0021] DETAILED DESCRIPTION OF THE INVENTION I: In combination with Figures 1 to 6This embodiment will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0022] It should be noted that the descriptions of the present invention regarding directions such as "front", "rear", "left", "right", "inside", "outside", "left side", "right side", "upper part", "lower part", "top", "bottom", etc. are all defined based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the described structure must be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In the description of the present invention, the meaning of "a plurality of" is more than two, unless otherwise specifically defined.

[0023] In the description of the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0024] An adaptive optical mount for suppressing angular deviation includes a vibration isolation platform 1, a piezoelectric ceramic seat 2, a positioning frame 3, an angle measuring device 4, a central processing chip 5, and multiple groups of positioning and adjusting components 6. Among them, the piezoelectric ceramic seat 2 and the angle measuring device 4 are both fixedly installed on the vibration isolation platform 1, the positioning frame 3 is fixedly installed on the piezoelectric ceramic seat 2, and the optical mirror 100 is arranged in the positioning frame 3 and is positioned and clamped by multiple groups of positioning and adjusting components 6 arranged circumferentially along the positioning frame 3. The positioning and adjusting component 6 includes a slider 61, and a positioning component and an adjusting component arranged on both sides of the slider 61. A limiting groove is provided on the slider 61, and the edge of the optical mirror 100 is slidably installed in the limiting groove. The positioning component includes a first linear adjusting mechanism 62 fixedly installed on the slider 61, a pressure sensor 63 arranged on one side of the optical mirror 100, and a first connecting member 64 fixedly connected between the output end of the first linear adjusting mechanism 62 and the pressure sensor 63. The adjusting component includes a rotating mechanism 65, a second linear adjusting mechanism 66, a first piezoelectric ceramic column 67, and a second connecting member 68. The second linear adjusting mechanism 66 is rotatably installed on the slider 61 through the rotating mechanism 65. The first piezoelectric ceramic column 67 is arranged on the other side of the optical mirror 100, and the second connecting member 68 is fixedly connected between the second linear adjusting mechanism 66 and the first piezoelectric ceramic column 67. A displacement sensor is provided inside both the piezoelectric ceramic base 2 and the first piezoelectric ceramic column 67. The piezoelectric ceramic base 2, the first piezoelectric ceramic column 67, the displacement sensor, the first linear adjustment mechanism 62, the second linear adjustment mechanism 66, the pressure sensor 63, and the angle measurement device 4 are all connected to the central processing chip 5 in a signal connection.

[0025] Both the piezoelectric ceramic base 2 and the first piezoelectric ceramic column 67 are high-precision piezoelectric ceramics.

[0026] The number of the positioning and adjustment components 6 can be two groups, three groups or more groups, and the specific number is determined according to actual needs.

[0027] The positions where multiple positioning and adjustment components 6 are circumferentially distributed along the optical mirror 100 can be determined according to the shape of the actual optical mirror 100, and preferably they are evenly distributed along the circumference of the optical mirror 100.

[0028] The shape of the positioning frame 3 can be determined according to the shape of the optical mirror 100, and preferably the inner side contour of the positioning frame 3 is adapted to the optical mirror 100.

[0029] The optical mirror holder capable of self-adapting to angular deviation in the present invention can be adapted to optical mirrors 100 including, but not limited to, mirrors, refractors, transmitters, fast steering mirrors and other lenses, as well as infrared lenses in some infrared cameras that need to be installed at different angles according to the change of infrared focal length to ensure the best observation effect.

[0030] The angle measurement device 4 is any sensor or instrument in the prior art that can realize angle measurement.

[0031] The rotation mechanism 65 is any mechanism in the prior art that can realize angle adjustment. The rotation mechanism 65 can be actively controlled or passively controlled, as long as it can realize the rotation of the second connecting member 68 and the second linear adjustment mechanism 66. A locking structure can be provided on the rotation mechanism 65 to lock it when it is not rotating.

[0032] The optical mirror holder capable of self-adapting to angular deviation in the present invention can effectively reduce the angular change of the optical mirror 100 caused by vibration and thermal expansion, and greatly improve the performance of the optical mirror 100.

[0033] The tilt angle of the vibration isolation platform 1 is monitored in real time by the angle measurement device 4 and transmitted to the central processing chip 5. The central processing chip 5 controls the elongation and shortening of the piezoelectric ceramic base 2, and real-time feedback is carried out through the displacement sensor inside it to form a closed-loop control.

[0034] The positioning and position adjustment of the optical mirror 100 are realized through the positioning and adjustment components 6. Specific operations can be, for example: Rotate the second connecting member 68 and the second linear adjustment mechanism 66 in each positioning and adjustment assembly 6 so that the optical mirror 100 can be placed into the positioning frame 3 from one side; Adjust the optical mirror 100 through the first linear adjustment mechanism 62 and the pressure sensors 63 so that the pressure values of the pressure sensors 63 are equal; during this process, if the contact surfaces of the optical mirror 100 in contact with the pressure sensors 63 are not in the same vertical plane, the first linear adjustment mechanism 62 can be adjusted to make the pressure values of the pressure sensors 63 equal, or the position of the slider 61 on the circumferential direction of the positioning frame 3 can be adjusted to make the pressure values of the pressure sensors 63 equal.

[0035] After the pressure values of the pressure sensors 63 are equal, rotate the second connecting member 68 and the second linear adjustment mechanism 66 in each positioning and adjustment assembly 6 again so that the optical mirror 100 is clamped between the pressure sensors 63 and the first piezoelectric ceramic column 67. Fix the optical mirror 100 by adjusting the second linear adjustment mechanism 66, and then adjust the position of the optical mirror 100 according to the first piezoelectric ceramic column 67 and the displacement sensor and the pressure sensor 63 therein so that the axis of the optical mirror 100 is horizontal. At this time, the optical mirror 100 is clamped.

[0036] During the use of the optical mirror 100, the piezoelectric ceramic seat 2 and the first piezoelectric ceramic column 67 can be adjusted in real time according to the feedback of the pressure sensors 63 and the displacement sensors to compensate for the angular deviation caused by vibration or temperature change.

[0037] The piezoelectric ceramic seat 2 includes a mounting seat 21 and a plurality of second piezoelectric ceramic columns 22. The mounting seat 21 is arranged above the vibration isolation platform 1 and the mounting seat 21 is connected to the vibration isolation platform 1 through a plurality of second piezoelectric ceramic columns 22. Designed in this way, each second piezoelectric ceramic column 22 is arranged vertically, and a displacement sensor is arranged inside each second piezoelectric ceramic column 22. By arranging a plurality of second piezoelectric ceramic columns 22, it is convenient to adjust the angle of the positioning frame 3 and the optical mirror 100 mounted thereon.

[0038] The vibration isolation platform 1 includes a platform main body 11 and a plurality of support blocks 12 evenly distributed at the bottom of the platform main body 11 and fixedly connected to the platform main body 11. The machining accuracy of the support blocks 12 is higher than that of the platform main body 11. Designed in this way, the support blocks 12 are smaller in size and more convenient to machine, so that the vibration isolation platform 1 has a higher installation accuracy.

[0039] Flexible clamping pads 69 are respectively arranged on the pressure sensors 63 and on the surface of the first piezoelectric ceramic column 67 in contact with the optical mirror 100. Designed in this way, the flexible clamping pads 69 are provided to protect the optical mirror 100 and avoid damage to the optical mirror 100 caused by clamping.

[0040] The flexible clamping pad 69 is made of rubber or plastic.

[0041] Both the first linear adjustment mechanism 62 and the second linear adjustment mechanism 66 are linear motors.

[0042] Both the first connecting member 64 and the second connecting member 68 are rod-shaped structures. With such a design, both the first connecting member 64 and the second connecting member 68 are rod-shaped structures with high rigidity, which is more convenient for processing.

[0043] The number of the positioning and adjusting assemblies 6 is three groups and they are evenly distributed along the circumferential direction of the optical mirror 100.

[0044] The inner contour of the positioning frame 3 is adapted to the optical mirror 100.

[0045] The central processing chip 5 is installed on the piezoelectric ceramic seat 2.

[0046] As mentioned above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. An adaptive optical frame for suppressing angular deviation, characterized in that: The invention comprises a vibration isolation platform (1), a piezoelectric ceramic seat (2), a positioning frame (3), an angle measuring device (4), a central processing chip (5) and a plurality of positioning adjustment components (6), wherein the piezoelectric ceramic seat (2) and the angle measuring device (4) are both fixedly mounted on the vibration isolation platform (1), the positioning frame (3) is fixedly mounted on the piezoelectric ceramic seat (2), the optical mirror (100) is arranged in the positioning frame (3) and is positioned and clamped by the plurality of positioning adjustment components (6) arranged along the circumference of the positioning frame (3), The positioning and adjustment component (6) comprises a slider (61) and a positioning component and an adjustment component arranged on both sides of the slider (61) relative to each other, wherein a limit groove is provided on the slider (61), and the edge of the optical mirror (100) is slidably mounted in the limit groove; the positioning component comprises a first linear adjustment mechanism (62) fixedly mounted on the slider (61), a pressure sensor (63) arranged on one side of the optical mirror (100), and a first connecting member (64) fixedly connected between an output end of the first linear adjustment mechanism (62) and the pressure sensor (63); the adjustment component comprises a rotating mechanism (65), a second linear adjustment mechanism (66), a first piezoelectric ceramic column (67) and a second connecting member (68); the second linear adjustment mechanism (66) is rotatably mounted on the slider (61) via the rotating mechanism (65); the first piezoelectric ceramic column (67) is arranged on the other side of the optical mirror (100); and the second connecting member (68) is fixedly connected between the second linear adjustment mechanism (66) and the first piezoelectric ceramic column (67). Displacement sensors are arranged inside the piezoelectric ceramic seat (2) and the first piezoelectric ceramic column (67). The piezoelectric ceramic seat (2), the first piezoelectric ceramic column (67), the displacement sensor, the first linear adjustment mechanism (62), the second linear adjustment mechanism (66), the pressure sensor (63) and the angle measurement device (4) are all connected to the central processing chip (5) for signal transmission.

2. The adaptive optical frame for suppressing angle deviation according to claim 1, characterized in that: The piezoelectric ceramic seat (2) comprises a mounting seat (21) and a plurality of second piezoelectric ceramic columns (22); the mounting seat (21) is arranged above the vibration isolation platform (1), and the mounting seat (21) and the vibration isolation platform (1) are connected via the plurality of second piezoelectric ceramic columns (22).

3. The adaptive optical frame for suppressing angle deviation according to claim 1, characterized in that: The vibration isolation platform (1) comprises a platform body (11) and a plurality of support blocks (12) evenly distributed at the bottom of the platform body (11) and fixedly connected to the platform body (11); the processing accuracy of the support blocks (12) is higher than that of the platform body (11).

4. The adaptive optical frame for suppressing angle deviation according to claim 1, characterized in that: A flexible clamping pad (69) is respectively provided on the pressure sensor (63) and on a surface of the first piezoelectric ceramic column (67) that contacts the optical mirror (100).

5. The adaptive optical lens frame for suppressing angle deviation according to claim 4, characterized in that: The material of the flexible clamping pad (69) is rubber or plastic.

6. The adaptive optical frame for suppressing angle deviation according to claim 1, characterized in that: The first linear adjustment mechanism (62) and the second linear adjustment mechanism (66) are both linear motors.

7. The adaptive optical frame for suppressing angle deviation according to claim 1, characterized in that: The first connecting member (64) and the second connecting member (68) are both rod-shaped structures.

8. The adaptive optical lens frame for suppressing angle deviation according to claim 1, characterized in that: The number of the positioning adjustment components (6) is three groups and they are evenly distributed along the circumference of the optical mirror (100).

9. The adaptive optical frame for suppressing angle deviation according to claim 1, characterized in that: The inner contour of the positioning frame (3) is adapted to the optical mirror (100).

10. The adaptive optical lens frame for suppressing angle deviation according to claim 1, characterized in that: The central processing chip (5) is mounted on the piezoelectric ceramic seat (2).

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