An electrically adjustable mirror

Abstract

An electrically adjustable mirror is arranged in pairs, one of which is used to adjust the pupil position, and the other is used to adjust the optical axis position, comprising a moving mechanism, the upper end of the moving mechanism is provided with a lifting mechanism, the output end of the lifting mechanism is provided with a lens assembly, and the moving mechanism and the lifting mechanism are driven by an electric cylinder to adjust the position of the lens assembly, wherein the moving mechanism is used for X direction position adjustment of the lens assembly, and the lifting mechanism is used for Z direction position adjustment of the lens assembly, and through high-precision position adjustment of the lens assembly, the purpose of accurately adjusting the pupil and the optical axis position is achieved.

Description

Technical Field

[0001] This utility model relates to the field of laser system technology, and in particular to an electro-adjustment mirror. Background Technology

[0002] In laser systems, adjusting the positions of the pupil (i.e., the waist position and size of the laser beam) and the optical axis (i.e., the direction and position of the laser beam path) (such as Z-axis and X-axis adjustments) ensures optimal laser output performance and quality in real time. The pupil refers to the point of minimum diameter of the laser beam along its propagation path, typically located near the focal point of the focusing lens. The position and size of the pupil determine the laser's focusing performance. The optical axis refers to the central propagation direction or path of the laser beam. Alignment of the optical axis is crucial for ensuring the beam accurately passes through optical elements (such as lenses and mirrors).

[0003] Improving the accuracy of adjusting the position of the pupil and optical axis in a laser system is essential to ensuring the precision of laser transmission. However, the current adjustment methods suffer from limited adjustable range and poor adjustment accuracy. Therefore, improving the adjustment accuracy has become an urgent problem to be solved. Utility Model Content

[0004] This invention provides an electro-adjustment mirror to overcome the shortcomings of the prior art, improve the adjustment accuracy and adjustable range, and has strong practicality.

[0005] In order to achieve the purpose of this utility model, the following technology is proposed to be adopted: An electrically adjustable lens is provided, which is arranged in pairs. One lens is used to adjust the pupil position, and the other is used to adjust the optical axis position. The lens includes a moving mechanism, a lifting mechanism mounted on its upper end, and a lens assembly mounted on its output end. The moving and lifting mechanisms are driven by an electric cylinder to adjust the position of the lens assembly. The moving mechanism adjusts the X-axis position of the lens assembly, while the lifting mechanism adjusts the Z-axis position. Through high-precision adjustment of the lens assembly position using both mechanisms, the pupil and optical axis positions are precisely adjusted. The stroke of the moving and lifting mechanisms is ±10.5 mm.

[0006] The lens assembly includes a mounting base that is screwed onto the output end of the lifting mechanism. A mounting plate is screwed onto the mounting base, and an upper extension arm is formed on the mounting plate. A retaining ring is formed at the upper end of the upper extension arm, and a lens is fixed inside the retaining ring.

[0007] Furthermore, a protrusion is formed on the outer periphery of the fixing ring, and a screw hole is formed on the protrusion. A fixing screw is connected to the screw hole by a thread, and the inner end of the fixing screw acts on the outer periphery of the lens. The lens can be easily fixed by the screw.

[0008] Furthermore, the moving mechanism includes a base, on which an electrical control box is mounted. The electrical control box contains a control board, and a connector is mounted on the upper end of the electrical control box. The connector is connected to the control board, which facilitates precise control of the lens.

[0009] Furthermore, a pair of bearing seats are installed on the base, one of which is equipped with a mobile servo motor. The output shaft of the mobile servo motor is connected to a moving lead screw, and a nut is threaded onto the moving lead screw. A moving seat is installed on the nut by screws. Two pairs of guide bars are installed on the lower wall of the moving seat by screws, and a guide plate is provided between the guide bars. The guide plate is installed on the base. The moving lead screw is a C5 precision ball screw, and the output shaft of the mobile servo motor is connected to an absolute encoder.

[0010] Furthermore, the inner wall of the guide bar is provided with a V-shaped groove, and the guide plate is provided with multiple rectangular holes. Multiple limiting posts are provided in the rectangular holes, and there is an included angle between the axial directions of two adjacent limiting posts. The outer periphery of the limiting post is tangent to the inner wall of the V-shaped groove. The periphery of the limiting post contacts the lower side of the V-shaped groove. This guiding method can ensure the accuracy of the guidance and reduce the friction during movement.

[0011] Furthermore, a pair of limit switches are installed on the base. The inner side of the limit switch is provided with a spring piece that is inclined outward. The outer end of the spring piece is arc-shaped. A contact block is installed on one side of the moving base. The outer wall of the contact block is formed with an isosceles trapezoidal block. The two sides of the isosceles trapezoidal block are inclined surfaces. The contact block and the limit switch are located on the same side. In order to facilitate the limitation of the movement range, a limit switch is set. In order to avoid damage to the limit switch, an isosceles trapezoidal block is set. In order to facilitate the deformation of the spring piece and to avoid jamming even if excessive movement occurs, the outer end of the spring piece is set with an arc-shaped structure.

[0012] Furthermore, the lifting mechanism includes a lifting base mounted on a movable seat by screws, a vertical member mounted on the lifting base, lifting end seats mounted at the upper and lower ends of the vertical member, a lifting screw rotatably mounted on the lifting end seats, a motor mounting bracket mounted on the upper end of the vertical member by screws, a lifting servo motor mounted on the motor mounting bracket, the output shaft of the lifting servo motor connected to the lifting screw, the lifting screw being a C5 precision ball screw, a second absolute encoder connected to the output shaft of the lifting servo motor, the control accuracy being calibrated by the second absolute encoder, a lifting nut threaded onto the lifting screw, and a screw mounted on the lifting nut. The device has a lifting base, and the mounting base is installed on the lifting base with screws. The vertical component has a groove, and the two sides of the groove have guide grooves. The two sides of the lifting base have embedded protrusions that pass through the guide grooves. A side column is installed on one side of the vertical component. The side column has a T-shaped groove and a one-degree lifting limit switch is installed on the side column. The lifting limit switch has a connecting screw, and the inner end of the connecting screw has an inner block that passes through the T-shaped groove. A folding plate is installed on one side of the lifting base with screws. The folding plate and the lifting limit switch are located on the same side. Setting the lifting limit switch on the side column makes it convenient to adjust the movable range of the lifting base as needed.

[0013] Furthermore, a cable tie is installed on the back side of the vertical component, and a cable tie groove is opened on the inner side of the cable tie to facilitate cable protection and cable routing.

[0014] Furthermore, a front plate is installed on the lifting end seat by screws. A constraint groove is opened on the front side of the lifting seat, and the front plate passes through the constraint groove. The front plate plays a protective role for the lifting screw and prevents the oil generated when the lifting screw rotates from contaminating the lens.

[0015] Furthermore, the encoder repeatability is 7″, and the combined error accuracy of the moving mechanism and lifting mechanism after assembly is better than 0.026mm. The final combined accuracy is 0.0014 + 0.018 + 0.026 = 0.0454mm. The advantages of the above technical solution are: This invention facilitates the adjustment of the lens position in two vertical directions. During adjustment, the accuracy of the position adjustment is improved by using an absolute encoder, and the position adjustment has high stability. Attached Figure Description

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will provide a further detailed description of this utility model in conjunction with the accompanying drawings.

[0017] Figure 1 A three-dimensional structural diagram of one embodiment is shown.

[0018] Figure 2 The three-dimensional structure of the moving mechanism is shown. Figure 1.

[0019] Figure 3 The three-dimensional structure of the moving mechanism is shown. Figure 2 .

[0020] Figure 4 The three-dimensional structure of the moving mechanism is shown. Figure 3 .

[0021] Figure 5 A magnified view of point A is shown.

[0022] Figure 6 The three-dimensional structure of the lifting mechanism is shown. Figure 1 .

[0023] Figure 7 The three-dimensional structure of the lifting mechanism is shown. Figure 2 .

[0024] Figure 8 The control link diagram of the electrically adjustable mirror is shown. Detailed Implementation

[0025] like Figures 1-8 As shown, an electro-adjustable mirror includes a moving mechanism 1, a lifting mechanism 2 is mounted on the upper end of the moving mechanism 1, and a lens assembly 3 is mounted on the output end of the lifting mechanism 2.

[0026] The moving mechanism 1 and the lifting mechanism 2 are driven by electric cylinders to adjust the position of the lens assembly 3.

[0027] The moving mechanism 1 includes a base 10, on which an electrical control box 11 is mounted. The electrical control box 11 contains a control board, and a connector 12 is mounted on the upper end of the electrical control box 11, connecting to the control board. A pair of bearing seats 13 are mounted on the base 10. One of the bearing seats 13 houses a moving servo motor 14. The output shaft of the moving servo motor 14 is connected to a moving lead screw 15. A nut 16 is threaded onto the moving lead screw 15, and a moving seat 17 is mounted on the nut 16 via screws. Two pairs of guide bars 192 are mounted on the lower wall of the moving seat 17 via screws. A guide plate 194 is provided between the guide bars 192 and is mounted on the base 10. The inner wall of the guide bar 192 is provided with a V-shaped groove 193, and the guide plate 194 is provided with multiple rectangular holes 195. Multiple limiting posts 196 are provided in the rectangular holes 195. The axial direction of two adjacent limiting posts 196 is at an angle, and the outer periphery of the limiting post 196 is tangent to the inner wall of the V-shaped groove 193.

[0028] A pair of limit switches 190 are installed on the base 10. The inner side of the limit switch 190 is provided with a spring 191, which extends outward at an angle. The outer end of the spring 191 is arc-shaped. A contact block 18 is installed on one side of the movable seat 17. The outer wall of the contact block 18 is formed with an isosceles trapezoidal block 19. The two sides of the isosceles trapezoidal block 19 are inclined surfaces, and the contact block 18 and the limit switch 190 are located on the same side.

[0029] The lifting mechanism 2 includes a lifting base 20 mounted on a movable seat 17 by screws. A vertical member 21 is mounted on the lifting base 20. Lifting end seats 22 are mounted at the upper and lower ends of the vertical member 21, respectively. A lifting screw 291 is rotatably mounted on the lifting end seat 22. A motor mounting seat 24 is mounted on the upper end of the vertical member 21 by screws. A lifting servo motor 25 is mounted on the motor mounting seat 24. The output shaft of the lifting servo motor 25 is connected to the lifting screw 291. A lifting nut 292 is threaded onto the lifting screw 291. A lifting seat 293 is mounted on the lifting nut 292 by screws. The mounting base 30 is mounted by screws. On the lifting seat 293, a groove 295 is provided on the vertical member 21, and guide grooves 296 are provided on both sides of the groove 295. The lifting seat 293 has embedded protrusions on both sides, which pass through the guide grooves 296. A side column 26 is installed on one side of the vertical member 21. A T-shaped groove 27 is provided on the side column 26. A one-degree lifting limit switch 28 is installed on the side column 26. A connecting screw 29 is provided on the lifting limit switch 28. An inner block is provided on the inner end of the connecting screw 29. The inner block passes through the T-shaped groove 27. A folding plate 294 is installed on one side of the lifting seat 293 by screws. The folding plate 294 and the lifting limit switch 28 are located on the same side.

[0030] The lens assembly 3 includes a mounting base 30 that is screwed onto the lifting seat 293. A mounting plate 31 is screwed onto the mounting base 30. An upper extension arm 32 is formed on the mounting plate 31, and a fixing ring 33 is formed at the upper end of the upper extension arm 32. A lens is fixed inside the fixing ring 33. A protrusion 34 is formed on the outer periphery of the fixing ring 33, and a screw hole is formed on the protrusion 34. A fixing screw is threaded into the screw hole, and the inner end of the fixing screw acts on the outer periphery of the lens. A cable harness 298 is mounted on the back side of the vertical member 21, and a cable harness groove is formed on the inner side of the cable harness 298. A front plate 23 is screwed onto the lifting end seat 22. A constraint groove is formed on the front side of the lifting seat 293, and the front plate 23 passes through the constraint groove.

[0031] In this embodiment, when adjusting the lens assembly 3 in the X direction, the control system powers on the mobile servo motor 14, causing it to rotate the movable lead screw 15. The rotation of the lead screw 15 drives the nut 16, the movable seat 17, and the lifting mechanism 2 fixed to the movable seat 17 to move along the length of the limiting post 196, thereby achieving the purpose of adjusting the position of the lens assembly 3. During the adjustment process, an absolute encoder mounted on the mobile servo motor 14 monitors the movement position and provides feedback on the movement distance data.

[0032] In this embodiment, when adjusting the Z-axis of the lens assembly 3, the control system controls the start of the lifting servo motor 25, so that the lifting servo motor 25 drives the lifting screw 291 to rotate. The rotation of the lifting screw 291 will drive the lifting nut 292 and the lifting seat 293 to move along the guide groove 296. During the movement, the movement distance is monitored and fed back by the second absolute encoder set on the output shaft of the lifting servo motor 25. In this way, the vertical position adjustment of the lens assembly 3 can be achieved.

[0033] In this embodiment, the position of the pupil and the optical axis can be adjusted by using the moving mechanism 1 and the lifting mechanism 2.

[0034] In this embodiment, six electrically adjustable mirrors control the pupils and optical axes of six beams. Each electrically adjustable mirror consists of two XZ translation stages. After calculation, the acquisition unit sends the pupil and optical axis control values ​​to the Nth electrically adjustable mirror controller via the Nth RS485 (a total of 6 independent RS485s). The controller calculates the motion corresponding to each translation stage based on the deviation value of the pupil and optical axis, and then uses 4-axis interpolation motion to control the Nth electrically adjustable mirror.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An electro-accommodation mirror, characterized in that, It includes a moving mechanism (1), a lifting mechanism (2) is installed at the upper end of the moving mechanism (1), and a lens assembly (3) is installed at the output end of the lifting mechanism (2). The moving mechanism (1) and the lifting mechanism (2) are driven by electric cylinders to adjust the position of the lens assembly (3); The lens assembly (3) includes a mounting base (30) that is mounted on the output end of the lifting mechanism (2) by screws. A mounting plate (31) is mounted on the mounting base (30) by screws. An upper extension arm (32) is formed on the mounting plate (31). A fixing ring (33) is formed at the upper end of the upper extension arm (32). A lens is fixed inside the fixing ring (33).

2. The electro-accommodation mirror according to claim 1, characterized in that, The outer periphery of the fixing ring (33) is formed with a protrusion (34), and the protrusion (34) is formed with a screw hole. The screw hole is connected to a fixing screw by a thread, and the inner end of the fixing screw acts on the outer periphery of the lens.

3. The electro-accommodation mirror according to claim 1, characterized in that, The moving mechanism (1) includes a base (10), an electrical control box (11) is installed on the base (10), a control board is provided inside the electrical control box (11), and a connector (12) is installed at the upper end of the electrical control box (11) and connected to the control board.

4. The electro-adjustment mirror according to claim 3, characterized in that, A pair of bearing seats (13) are installed on the base (10). One of the bearing seats (13) is equipped with a moving servo motor (14). The output shaft of the moving servo motor (14) is connected to a moving lead screw (15). A nut (16) is threaded onto the moving lead screw (15). A moving seat (17) is installed on the nut (16) by screws. Two pairs of guide bars (192) are installed on the lower wall of the moving seat (17) by screws. A guide plate (194) is provided between the guide bars (192). The guide plate (194) is installed on the base (10).

5. The electro-accommodation mirror according to claim 4, characterized in that, The inner wall of the guide bar (192) is provided with a V-shaped groove (193), and the guide plate (194) is provided with multiple rectangular holes (195). Multiple limiting posts (196) are provided in the rectangular holes (195). There is an included angle between the axial directions of two adjacent limiting posts (196), and the outer periphery of the limiting post (196) is tangent to the inner wall of the V-shaped groove (193).

6. The electro-accommodation mirror according to claim 4, characterized in that, A pair of limit switches (190) are installed on the base (10). The inner side of the limit switch (190) is provided with a spring (191). The spring (191) extends outward at an angle. The outer end of the spring (191) is arc-shaped. A contact block (18) is installed on one side of the moving seat (17). The outer wall of the contact block (18) is formed with an isosceles trapezoidal block (19). The two sides of the isosceles trapezoidal block (19) are inclined surfaces. The contact block (18) and the limit switch (190) are located on the same side.

7. The electro-accommodation mirror according to claim 4, characterized in that, The lifting mechanism (2) includes a lifting base (20) mounted on a movable seat (17) by screws. A vertical member (21) is mounted on the lifting base (20). Lifting end seats (22) are mounted on the upper and lower ends of the vertical member (21). A lifting screw (291) is rotatably mounted on the lifting end seat (22). A motor mounting seat (24) is mounted on the upper end of the vertical member (21) by screws. A lifting servo motor (25) is mounted on the motor mounting seat (24). The output shaft of the lifting servo motor (25) is connected to the lifting screw (291). A lifting nut (292) is threaded onto the lifting screw (291). A lifting seat (293) is mounted on the lifting nut (292) by screws. The mounting seat (30) is mounted on the vertical member (17) by screws. On the lifting seat (293), a groove (295) is provided on the vertical member (21), and guide grooves (296) are provided on both sides of the groove (295). An embedded protrusion is formed on both sides of the lifting seat (293), and the embedded protrusion passes through the guide groove (296). A side column (26) is installed on one side of the vertical member (21), and a T-shaped groove (27) is provided on the side column (26). A one-degree lifting limit switch (28) is installed on the side column (26), and a connecting screw (29) is provided on the lifting limit switch (28). An inner block is provided on the inner end of the connecting screw (29), and the inner block passes through the T-shaped groove (27). A folding plate (294) is installed on one side of the lifting seat (293) by screws. The folding plate (294) and the lifting limit switch (28) are located on the same side.

8. The electro-accommodation mirror according to claim 7, characterized in that, A wire harness (298) is installed on the back side of the vertical member (21), and a wire harness groove is provided on the inner side of the wire harness (298).

9. The electro-accommodation mirror according to claim 7, characterized in that, A front plate (23) is installed on the lifting end seat (22) by screws. A constraint groove is opened on the front side of the lifting seat (293), and the front plate (23) passes through the constraint groove.

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