Fine adjustment platform for optical instruments

Abstract

The utility model discloses a kind of fine adjustment platform for optical instrument, including sequentially being provided with base, moving table one and moving table two from bottom to top, the top surface of base and the bottom surface of moving table two are respectively provided with guide boss one and guide boss two, the bottom surface and top surface of moving table one are respectively provided with upper guide groove and lower guide groove;Fine adjustment mechanism one that moving table one can be driven to slide along guide boss one is equipped on base, fine adjustment mechanism one includes that micrometer screw one is equipped on base, the telescopic end of micrometer screw one is abutted on the side wall of moving table one moving direction;Fine adjustment mechanism two that moving table two can be driven to slide along upper guide groove is equipped on moving table two, fine adjustment mechanism two includes that micrometer screw two is equipped on moving table, the telescopic end of micrometer screw two is abutted on the side wall of moving table one non-moving direction;The utility model has the advantages of simple structure, flexible and convenient to use, and higher adjusting precision.

Description

Technical Field

[0001] This utility model relates to the field of interferometer technology, specifically to a fine-tuning platform for optical instruments. Background Technology

[0002] Interferometers, as core equipment in the field of precision measurement, are based on the principle of light interference. By analyzing the interference fringes formed by the superposition of light beams, they achieve high-precision quantification of physical quantities such as minute displacements, angles, and surface morphologies. Their measurement accuracy directly depends on the positioning stability and adjustment precision of the optical components. In the use of laser interferometers, precise adjustment of the optical lenses' positions along the X and Z axes is required. (Patent announcement) CN208780920U discloses a laser interferometer gimbal, specifically disclosing an X-axis adjustment mechanism and a Z-axis adjustment mechanism, but it suffers from problems such as low adjustment accuracy and poor adjustment stability. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a fine-tuning platform for optical instruments. This fine-tuning platform has a simple structure, is flexible and convenient to use, has high adjustment accuracy, and is stable and smooth, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a fine-tuning platform for optical instruments, comprising a base, a movable stage one, and a movable stage two arranged sequentially from bottom to top. The top surface of the base and the bottom surface of the movable stage two are respectively provided with a guide protrusion one and a guide protrusion two, which are perpendicular to each other. The bottom surface of the movable stage one is provided with a lower guide groove adapted to the guide protrusion one, and the top surface of the movable stage one is provided with an upper guide groove adapted to the guide protrusion two. A fine-tuning mechanism one is provided on the base, capable of driving the movable stage one to slide along the guide protrusion one. The fine-tuning mechanism one includes a fixing block one fixed to the base, and a micrometer screw one is provided on the fixing block one. The telescopic end of the micrometer screw one abuts against a side wall in the direction of movement of the movable stage one. An opening is provided at the center of the base, and the movable stage one is located opposite... A lower abutment block is provided at the open position. A compression spring is provided between the lower abutment block and the base along the direction of the guide protrusion. The elastic force generated by the compression spring on the moving platform ensures that the moving platform always fits against the telescopic end of the micrometer screw. The moving platform is provided with a fine adjustment mechanism 2 that can be driven to slide along the upper guide groove. The fine adjustment mechanism 2 includes a fixing block 2 fixedly provided on the moving platform 2. A micrometer screw 2 is provided on the fixing block 2. The telescopic end of the micrometer screw 2 abuts against the side wall of the moving platform 1 in the non-moving direction. An open position is also provided at the center of the moving platform 2. An upper abutment block is provided at the position of the moving platform 1 corresponding to the open position. A compression spring 2 is provided between the upper abutment block and the moving platform 2 along the lower guide groove. The elastic force generated by the compression spring on the moving platform 2 ensures that it always fits against the telescopic end of the micrometer screw 1.

[0005] Furthermore, a screw hole 1 is provided on one end face of the base opposite to the micrometer screw 1, and the screw hole 1 corresponds to the compression spring 1. A threaded plug 3 is screwed into the screw hole 1, and the compression spring is fitted into the screw hole 1 and abuts against the threaded plug 3. A screw hole 2 is provided on one end face of the moving platform 2 opposite to the micrometer screw 2, and the screw hole 2 corresponds to the compression spring 2. A threaded plug 4 is screwed into the screw hole 2, and the compression spring 2 is fitted into the screw hole 2 and abuts against the threaded plug 4.

[0006] Furthermore, both guide protrusion one and guide protrusion two are isosceles trapezoidal protrusion structures, and both the upper guide groove and the lower guide groove are isosceles trapezoidal groove structures.

[0007] Furthermore, the movable platform 1 has a lower notch groove parallel to the lower guide groove on one side, and a threaded plug 1 is screwed onto one end face of the movable platform 1 near the lower notch groove and parallel to the lower guide groove, with the inner end of the threaded plug 1 abutting against the inner wall of the lower notch groove; the movable platform 1 has an upper notch groove parallel to the corresponding upper guide groove on one side, and a threaded plug 2 is screwed onto one end face of the movable platform 1 near the upper notch groove and parallel to the upper guide groove, with the inner end of the threaded plug 2 abutting against the inner wall of the upper notch groove.

[0008] Furthermore, a blind hole is provided at the position where the upper abutment block abuts against the compression spring, and a spring seat is fixedly provided in the blind hole, with the compression spring fitted inside the spring seat; the lower abutment block has the same structure as the upper abutment block.

[0009] Furthermore, a lower steel ball is fixedly provided at the position of the moving platform one and the micrometer screw one, and the telescopic end of the micrometer screw one abuts against the lower steel ball; an upper steel ball is fixedly provided at the position of the moving platform one and the micrometer screw two, and the telescopic end of the micrometer screw two abuts against the upper steel ball.

[0010] Furthermore, the bottom surface of the base and the top surface of the second movable platform are both provided with removable covers at the corresponding open positions.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This fine-tuning platform for optical instruments adjusts the movement of the first moving stage by using micrometer screw one and the movement of the second moving stage by using micrometer screw two, resulting in high adjustment accuracy. Furthermore, the sliding friction between the first and second moving stages can be adjusted by tightening threaded plugs one and two, ensuring smooth movement. Tightening threaded plugs three and four ensures the response speed of the movement of the first and second moving stages. This fine-tuning platform has a simple structure, is flexible and convenient to use, has high adjustment accuracy, and provides stable and smooth adjustment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a three-dimensional view of the fine-tuning platform of this utility model; Figure 3 This is a schematic diagram of the structure of the mobile platform of this utility model; Figure 4 This is an isometric view of the upper side of the mobile platform of this utility model; Figure 5 This is a lower side isometric view of the mobile platform of this utility model; Figure 6 This is a schematic diagram of the base structure of this utility model; Figure 7 This is a schematic diagram of the second structure of the mobile platform of this utility model; Figure 8 This is a schematic diagram of the micro-adjustment mechanism of this utility model; Figure 9 This is a schematic diagram of the second fine-tuning mechanism of this utility model; Figure 10 This is a schematic diagram of the upper abutment block structure of this utility model; Figure 11 This is a schematic diagram of the present invention in use.

[0013] In the diagram: 1. Base; 11. Guide protrusion one; 2. Moving platform one; 21. Lower guide groove; 22. Upper guide groove; 23. Lower notch groove; 24. Thread plug one; 25. Upper notch groove; 26. Thread plug two; 27. Lower steel ball; 28. Upper steel ball; 3. Moving platform two; 31. Guide protrusion two; 4. Fine adjustment mechanism one; 41. Fixing block one; 42. Micrometer screw one; 43. Lower abutment block; 44. Compression spring one; 45. Thread plug three; 5. Fine adjustment mechanism two; 51. Fixing block two; 52. Micrometer screw two; 53. Upper abutment block; 531. Blind hole; 532. Spring seat; 54. Compression spring two; 55. Thread plug four; 6. Opening; 7. Cover plate. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0015] Please see Figure 1-11This utility model provides a technical solution: a fine-tuning platform for optical instruments, comprising a base 1, a movable stage 2, and a movable stage 3 arranged sequentially from bottom to top. The top surface of the base 1 and the bottom surface of the movable stage 3 are respectively provided with a guide protrusion 11 and a guide protrusion 31, which are perpendicular to each other. The bottom surface of the movable stage 2 is provided with a lower guide groove 21 adapted to the guide protrusion 11, and the top surface of the movable stage 2 is provided with an upper guide groove 22 adapted to the guide protrusion 31. The base 1 is provided with a... A fine-tuning mechanism 4 drives the moving stage 2 to slide along the guide protrusion 11, and a fine-tuning mechanism 5 is provided on the moving stage 3 to drive it to slide along the upper guide groove 22. In this embodiment, the guide protrusion 11 and the guide protrusion 21 are both isosceles trapezoidal protrusion structures, and the upper guide groove 22 and the lower guide groove 21 are both isosceles trapezoidal groove structures. The base 1 is installed on the interferometer mounting base, and the interferometer is fixed to the moving stage 3. Fine-tuning mechanisms 4 and 5 can be used to fine-tune the interferometer in the X-axis and Z-axis directions.

[0016] The fine-tuning mechanism 4 includes a fixing block 41 fixed to the base 1. A micrometer screw 42 is mounted on the fixing block 41. The telescopic end of the micrometer screw 42 abuts against a side wall of the moving platform 2 in the direction of movement. An opening 6 is provided at the center of the base 1. A lower abutment block 43 is provided on the moving platform 2 at the position corresponding to the opening 6. A compression spring 44 is provided between the lower abutment block 43 and the base 1 along the direction of the guide protrusion 11. A screw hole 45 is provided on one end face of the base 1 opposite to the micrometer screw 42, and the screw hole 45 corresponds to the compression spring 44. A threaded plug 45 is screwed into the screw hole 45. A compression spring 44 is fitted inside a screw hole 1 and abuts against a threaded plug 3 45. The elastic force generated by the compression spring 44 on the moving stage 2 keeps the moving stage 2 always in contact with the telescopic end of the micrometer screw 42. The compression spring 44 applies an elastic force to the lower abutment block 43, so that the moving stage 2 is always in a tendency to move towards the micrometer screw 42. By turning the micrometer screw 42, the moving stage 2 drives the interferometer to move in the X-axis direction. The elastic force applied by the compression spring 44 to the lower abutment block 43 can be adjusted by turning the threaded plug 3 45, ensuring smooth adjustment while maintaining the response speed of the moving stage 2.

[0017] The movable platform 2 has a lower notch 23 parallel to the lower guide groove 21 on one side. A threaded plug 24 is screwed onto one end face of the movable platform 2 near the lower notch 23 and parallel to the lower guide groove 21. The inner end of the threaded plug 24 abuts against the inner wall of the lower notch 23. By screwing the threaded plug 24, the friction between the lower guide groove 21 and the guide protrusion 11 can be adjusted to ensure that the movable platform 2 moves smoothly and responds quickly.

[0018] The fine-tuning mechanism 25 includes a fixed block 251 fixedly mounted on the moving platform 23. A micrometer screw 252 is mounted on the fixed block 251. The telescopic end of the micrometer screw 252 abuts against a side wall of the moving platform 2 in the non-moving direction. An opening 6 is also provided at the center of the moving platform 23. An upper abutment block 53 is provided on the moving platform 2 at the position corresponding to the opening 6. A compression spring 254 is provided between the upper abutment block 53 and the moving platform 23 along the lower guide groove 21. A screw hole 2 is opened on the end face of the moving platform 23 opposite to the micrometer screw 252, and the screw hole 2 corresponds to the compression spring 254. A threaded plug is screwed into the screw hole 2. Compression spring 2 54 is fitted inside screw hole 2 and abuts against thread plug 4 55; the elastic force generated by compression spring 2 54 on moving stage 2 3 keeps it in contact with the telescopic end of micrometer screw 1 42; the elastic force applied by compression spring 2 54 to thread plug 4 55 keeps moving stage 2 3 away from micrometer screw 2 52; by turning micrometer screw 2 52, moving stage 2 3 moves interferometer in the Z-axis direction, and the elastic force applied by compression spring 2 54 to thread plug 4 55 can be adjusted by turning thread plug 4 55, ensuring smooth adjustment while maintaining the response speed of moving stage 2 3.

[0019] The movable stage 2 has an upper notch 25 parallel to the upper guide groove 22 on one side. A threaded plug 26 is screwed onto one end face of the movable stage 2 near the upper notch 25 and parallel to the upper guide groove 22. The inner end of the threaded plug 26 abuts against the inner wall of the upper notch 25. By screwing the threaded plug 26, the friction between the upper guide groove 22 and the guide protrusion 31 can be adjusted to ensure that the movable stage 2 moves smoothly and responds quickly.

[0020] A blind hole 531 is provided at the position where the upper abutment block 53 abuts against the compression spring 44. A spring seat 532 is fixedly provided in the blind hole 531, and the compression spring 44 is sleeved in the spring seat 532. The lower abutment block 43 has the same structure as the upper abutment block 53, which improves the stability of the compression spring 44 and the compression spring 54 when they extend and retract.

[0021] A lower steel ball 27 is fixedly installed at the position of the moving platform 12 and the micrometer screw 12, and the telescopic end of the micrometer screw 142 abuts against the lower steel ball 27; an upper steel ball 28 is fixedly installed at the position of the moving platform 12 and the micrometer screw 22, and the telescopic end of the micrometer screw 22 abuts against the upper steel ball 28; the moving platform 12 forms point contact with the telescopic end of the micrometer screw 142 through the lower steel ball 27, and the moving platform 12 forms point contact with the telescopic end of the micrometer screw 22 through the upper steel ball 28, thereby improving the adjustment accuracy and response speed.

[0022] The bottom surface of the base 1 and the top surface of the movable platform 3 are both provided with detachable cover plates 7 at the corresponding openings 6. The cover plates 7 are used to seal and protect the internal structure of the fine-tuning platform.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fine-tuning platform for an optical instrument, comprising a base, a first movable stage, and a second movable stage arranged sequentially from bottom to top, characterized in that: The top surface of the base and the bottom surface of the movable platform are respectively provided with guide protrusion 1 and guide protrusion 2, and guide protrusion 1 and guide protrusion 2 are perpendicular to each other. The bottom surface of the movable platform 1 is provided with a lower guide groove that matches guide protrusion 1, and the top surface of the movable platform 1 is provided with an upper guide groove that matches guide protrusion 2. The base is provided with a fine adjustment mechanism 1 that can drive the movable platform 1 to slide along guide protrusion 1. The fine adjustment mechanism 1 includes a fixing block 1 fixed on the base. The fixing block 1 is provided with a micrometer screw 1. The telescopic end of the micrometer screw 1 abuts against a side wall in the direction of movement of the movable platform 1. The center of the base is provided with an opening. The movable platform 1 is provided with a lower abutment block at the position corresponding to the opening. The lower abutment block and the base are connected along guide protrusion 1. A compression spring is provided in the direction of movement, and the elastic force generated by the compression spring on the first moving platform ensures that the first moving platform is always in contact with the telescopic end of the micrometer screw. The second moving platform is provided with a fine adjustment mechanism, which can be driven to slide along the upper guide groove. The fine adjustment mechanism includes a fixing block fixedly mounted on the second moving platform, and a micrometer screw is mounted on the fixing block. The telescopic end of the micrometer screw abuts against the side wall of the first moving platform in the non-moving direction. An opening is also provided at the center of the second moving platform. The first moving platform is provided with an upper abutment block at the position corresponding to the opening. A compression spring is provided between the upper abutment block and the second moving platform along the lower guide groove, and the elastic force generated by the compression spring on the second moving platform ensures that it is always in contact with the telescopic end of the micrometer screw.

2. The fine-tuning platform for optical instruments according to claim 1, characterized in that: A screw hole 1 is provided on one end face of the base opposite to the micrometer screw 1, and the screw hole 1 corresponds to the compression spring 1. A threaded plug 3 is screwed into the screw hole 1, and the compression spring is fitted into the screw hole 1 and abuts against the threaded plug 3. A screw hole 2 is provided on one end face of the moving platform 2 opposite to the micrometer screw 2, and the screw hole 2 corresponds to the compression spring 2. A threaded plug 4 is screwed into the screw hole 2, and the compression spring 2 is fitted into the screw hole 2 and abuts against the threaded plug 4.

3. The fine-tuning platform for optical instruments according to claim 1, characterized in that: Both guide protrusion one and guide protrusion two are isosceles trapezoidal protrusion structures, and both the upper guide groove and the lower guide groove are isosceles trapezoidal groove structures.

4. The fine-tuning platform for optical instruments according to claim 1, characterized in that: The movable platform 1 has a lower notch groove parallel to the lower guide groove on one side. A threaded plug 1 is screwed onto one end face of the movable platform 1 that is close to the lower notch groove and parallel to the lower guide groove. The inner end of the threaded plug 1 abuts against the inner wall of the lower notch groove. The movable platform 1 has an upper notch groove parallel to the upper guide groove on one side. A threaded plug 2 is screwed onto one end face of the movable platform 1 that is close to the upper notch groove and parallel to the upper guide groove. The inner end of the threaded plug 2 abuts against the inner wall of the upper notch groove.

5. The fine-tuning platform for optical instruments according to claim 1, characterized in that: A blind hole is provided at the position where the upper abutment block abuts against the compression spring, and a spring seat is fixedly installed in the blind hole, with the compression spring fitted inside the spring seat; the lower abutment block has the same structure as the upper abutment block.

6. The fine-tuning platform for optical instruments according to claim 1, characterized in that: A lower steel ball is fixedly provided at the position of the moving platform one and the micrometer screw one, and the telescopic end of the micrometer screw one abuts against the lower steel ball; an upper steel ball is fixedly provided at the position of the moving platform one and the micrometer screw two, and the telescopic end of the micrometer screw two abuts against the upper steel ball.

7. The fine-tuning platform for optical instruments according to claim 1, characterized in that: The bottom surface of the base and the top surface of the second movable platform are both provided with removable covers at the corresponding open positions.

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