Angle adjusting device and optical system
By designing an angle adjustment device including a first adjustment assembly and a second adjustment assembly, the problem of measuring and adjusting the angle of the reflected light beam of the digital micromirror device is solved, and more efficient and precise angle adjustment is achieved.
Patent Information
- Application Number
- CN202311278734.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-28
- Publication Date
- 2025-03-28
AI Technical Summary
When testing the reflected beam of a digital micromirror device, it is difficult for traditional methods to accurately measure and adjust the angle of the beam, resulting in cumbersome measurements and inaccurate results.
An angle adjustment device is designed, including a first adjustment assembly and a second adjustment assembly, and the first adjustment assembly can be rotated about the first axis and the second axis through an movable connection, synchronously driving the target device to rotate, thereby adjusting its angle.
This device makes the angle adjustment of the target device more convenient and precise, improves the degree of freedom of angle, and simplifies the measurement and debugging process of beam angle.
Smart Images
Figure CN119717252A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of device testing technology, and in particular to an angle adjustment device and an optical system including the angle adjustment device. Background Art
[0002] Digital Micromirror Device (DMD) is a spatial light modulator widely used in optical systems. DMD can modulate a light beam by changing its amplitude and phase.
[0003] The DMD as a whole has the characteristics of a two-dimensional blazed grating for incident light. When the light beam is incident vertically on the surface of the two-dimensional blazed grating, it will be reflected in different directions to form multiple reflected light beams. The reflection angles of reflected light beams of different orders are different. This makes the angle measurement cumbersome and difficult, and the results are inaccurate when testing the application effects of reflected light beams of different orders. Traditional angle determination is mostly based on empirical values and laboratory measurements, which is not efficient and convenient enough. Summary of the invention
[0004] A first aspect of the present application provides an angle adjustment device, comprising a first adjustment component and a second adjustment component;
[0005] The first adjusting component is used to fix the target device, the first adjusting component is movably connected to the second adjusting component and can rotate around a first axis, and the first adjusting component can be displaced relative to the second adjusting component;
[0006] When the first adjustment component rotates around the first axis, it drives the target device to rotate synchronously around the first axis. When the first adjustment component is displaced relative to the second adjustment component, it rotates around the second axis to drive the target device to rotate synchronously around the second axis. The first axis and the second axis have a non-zero angle.
[0007] A second aspect of the present application provides an optical system, comprising at least a digital micromirror device and an angle adjustment device as described above, wherein the digital micromirror device is fixed to the support surface by the first adjustment component.
[0008] The above-mentioned angle adjustment device and optical system, the first adjustment component is movably connected with the second adjustment component, the first adjustment component can rotate around the first axis and the second axis respectively, and when the target device is assembled on the assembly part, the target device can be synchronously driven to rotate relative to the first axis and the second axis; in the process of testing the target device, it is necessary to test the optical properties of the reflected light formed after the incident light is incident on the target device and reflected by the target device, and the angle of the target device will affect the optical properties of the reflected light; by fixing and adjusting the target device through the above-mentioned angle adjustment device, the angle of the target device can be conveniently adjusted, and the above-mentioned angle adjustment device can respectively make the target device rotate around the first axis and the second axis, which is beneficial to improving the angular freedom of the target device. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a schematic diagram of the three-dimensional structure of the optical system according to an embodiment of the present application.
[0010] Figure 2 It is a schematic diagram of the three-dimensional structure of the angle adjustment device according to an embodiment of the present application.
[0011] Figure 3 for Figure 2 Exploded view of the mid-angle adjustment device.
[0012] Figure 4 for Figure 2 Exploded view of the second adjustment assembly of the mid-angle adjustment device.
[0013] Figure 5 for Figure 4 Cross-sectional structure diagram along line V-V.
[0014] Figure 6 It is a structural schematic diagram of the angle adjustment device after the first adjustment component rotates around the first axis by an angle.
[0015] Figure 7 It is a structural schematic diagram of the angle adjustment device after the first adjustment component rotates around the second axis by an angle.
[0016] Figure 8 It is a structural schematic diagram of the angle adjustment device after the first adjustment component and the second adjustment component are synchronously rotated around the third axis by an angle.
[0017] Main component symbols
[0018] Optical system 1
[0019] Angle adjustment device 100
[0020] Support surface S
[0021] First adjustment component 10
[0022] Mounting tool 11
[0023] Assembly Department 111
[0024] Connection part 112
[0025] Straight Edge 1122
[0026] Curved edge 1124
[0027] Through holes 114, 115, 312, 322
[0028] Connector 13
[0029] Second adjustment component 20
[0030] The first rail member 21
[0031] First groove 211
[0032] The second rail member 22
[0033] The second groove 221
[0034] Slider 23
[0035] Threaded hole 231
[0036] First card slot 232
[0037] Second card slot 233
[0038] Track 24
[0039] Fixing assembly 30
[0040] First bracket 31
[0041] The first vertex area 311
[0042] Second bracket 32
[0043] The second vertex area 321
[0044] First bolt 33
[0045] Second bolt 34
[0046] The first axis x
[0047] The second axis y
[0048] The third axis z
[0049] Target device 200
[0050] Driver board 210
[0051] DMD 220
[0052] Effective area 230
[0053] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION
[0054] See also Figure 1 , the optical system 1 of the present application includes an angle adjustment device 100 and a target device 200. The angle adjustment device 100 can be used to fix the target device 200 and to adjust the angle of the target device 200. The target device 200 of this embodiment includes a driving board 210 and a DMD220 fixed on the driving board 210. The driving board 210 has a driving circuit (not shown), and the driving circuit is electrically connected to the DMD220, and is used to drive the DMD220 to operate, so as to simulate the state in which each micro-mirror of the DMD220 is electrically deflected during normal use. An effective area 230 is defined on the surface of the DMD220 away from the driving board 210, and the effective area 230 is used to reflect light. In the process of debugging the DMD220, the incident light is controlled to be incident on the effective area 230 of the DMD220, and the performance of the reflected light reflected by the effective area 230 is detected. When DMD220 is in different angle states, the incident light enters DMD220 at different angles, and DMD220 modulates the incident light differently, so that the reflected light has different optical properties. Therefore, in the process of debugging DMD220, it is necessary to constantly change the angle of DMD220 to test the modulation effect of DMD220 on the incident light at different angles.
[0055] The process of debugging the DMD 220 is to assemble the target device 200 on the angle adjustment device 100. When the target device 200 is assembled on the angle adjustment device 100, it is fixed on the angle adjustment device 100 through the driving plate 210. The angle adjustment device 100 can synchronously drive the target device 200 to rotate through its own actuation, so that the target device 200 can change different angle states. The angle adjustment device 100 of this embodiment makes the angle change process of the target device 200 more convenient, and the angle change amount of the target device 200 can be easily read.
[0056] See also Figure 2 In this embodiment, the angle adjustment device 100 includes a first adjustment component 10, a second adjustment component 20 and a fixed component 30. The first adjustment component 10 is movably connected to the second adjustment component 20, and the first adjustment component 10 can rotate around the first axis x and the second axis y respectively. The second adjustment component 20 is connected to the fixed component 30, and the second adjustment component 20 can rotate around the third axis z. In this embodiment, the first axis x, the second axis y and the third axis z are perpendicular to each other. In other embodiments, the first axis x, the second axis y and the third axis z may have other non-zero angles with each other.
[0057] In this embodiment, the angle adjustment device 100 has a support surface S, and the DMD 220 is fixed to the support surface S by the first adjustment component 10 through the driving plate 210. The first adjustment component 10 and the second adjustment component 20 are mainly used to adjust the angle of the target device 200 by self-actuation. The fixing component 30 is mainly used to support the first adjustment component 10 and the second adjustment component 20, and keep the entire angle adjustment device 100 stable.
[0058] See also Figure 3 The first adjustment assembly 10 includes a mounting fixture 11, and the mounting fixture 11 includes a fixedly connected assembly portion 111 and a connecting portion 112. The assembly portion 111 is a substantially rectangular flat plate, and is used to fix and connect the target device 200. The assembly portion 111 is provided with two mutually spaced through holes 114, and the assembly portion 111 and the driving plate 210 in the target device 200 can be fixed by screwing bolts into the through holes 114.
[0059] In this embodiment, the connecting portion 112 is roughly in the shape of a fan-shaped frame, including two straight sides 1122 and an arc-shaped side 1124 connected between the two straight sides. One end of the two straight sides 1122 is fixedly connected to two opposite sides of the assembly portion 111, and the other end of the two straight sides 1122 is connected to the two ends of the arc-shaped side 1124. The arc-shaped side 1124 is connected to the second adjustment component 20. The connecting portion 112 connects the assembly portion 111 to the second adjustment component 20, and the connecting portion 112 is used to match the shape of the second adjustment component 20, so that the first adjustment component 10 can be easily rotated around the first axis x. The first axis x is perpendicular to the plane where the assembly portion 111 is located. That is, when the angle adjustment device 100 is assembled with the target device 200, the first axis x is perpendicular to the plane where the effective area 230 of the target device 200 is located.
[0060] In a modified embodiment of the present application, the number of through holes 114 may be different. In another modified embodiment of the present application, the target device 200 may also be fixed to the assembly portion 111 in other ways, such as by gluing, snapping, etc. The present application does not limit the shapes of the assembly portion 111 and the connecting portion 112. The shapes of the assembly portion 111 and the connecting portion 112 described in this embodiment are only examples, wherein the shape of the connecting portion 112 is sufficient as long as the assembly portion 111 can be connected to the second adjustment component 20 and the first adjustment component 10 can be rotated around the first axis x. In this embodiment, the assembly portion 111 and the connecting portion 112 are an integrally formed structure, and may also be a split structure in other embodiments.
[0061] Please also read Figure 4 and Figure 5The second adjustment assembly 20 includes a first rail member 21, a second rail member 22 and a slider 23. The first rail member 21 and the second rail member 22 have substantially the same structure. A first groove 211 is formed on the first rail member 21, and a second groove 221 is formed on the second rail member 22. A side of the first rail member 21 where the first groove 211 is formed and a side of the second rail member 22 where the second groove 221 is formed fit together, so that the first groove 211 and the second groove 221 cooperate to form a rail 24.
[0062] In this embodiment, the first track member 21 and the second track member 22 are both semicircular in shape as a whole, and the first groove 211 and the second groove 221 are also semicircular in structure, so that the second adjustment component 20 forms a semicircular track 24 .
[0063] Please refer to Figure 2 , the slider 23 is located in the track 24 and can slide along the extension direction of the track 24. The slider 23 is connected to the arc edge of the connecting portion 112. When the slider 23 slides in the track 24, it drives the first adjustment component 10 to move relative to the second adjustment component 20. During the displacement of the first adjustment component 10 relative to the second adjustment component 20, it rotates around the second axis y, thereby driving the target device 200 to rotate synchronously around the second axis y. In this embodiment, since the track 24 is a semicircular track, the first adjustment component 10 and the target device 200 can rotate 180° around the second axis y. The second axis y is parallel to the plane where the assembly portion 111 is located, and is also parallel to the effective area 230 of the target device 200, and is perpendicular to the plane where the track 24 extends.
[0064] Please also read Figure 2-Figure 4 In this embodiment, a threaded hole 231 is provided on the slider 23, and a through hole 115 is provided on the arcuate edge of the connecting portion 112. The first adjustment assembly 10 further includes a connecting member 13, which is connected to the connecting portion 112 of the mounting tool 11 and is rotatably connected to the slider 23, so as to rotatably fix the mounting tool 11 to the slider 23 and enable the mounting tool 11 to rotate around the first axis x when the connecting member 13 is loosened relative to the slider 23. In one embodiment, the connecting member 13 is a non-standard shoulder screw, and the shoulder portion of the non-standard shoulder screw is slidably matched with the through hole 121, so that the first adjustment assembly 10 can freely rotate 360° around the first axis x. The threaded portion of the non-standard shoulder screw is threadedly matched with the threaded hole 231, so as to connect the first adjustment assembly 10 to the slider 23. When the threaded portion of the non-standard shoulder screw is loosened, the first adjustment assembly 10 can rotate around the first axis x, and when the threaded portion of the non-standard shoulder screw is tightened, the angular position of the first adjustment assembly 10 is fixed.
[0065] The slider 23 is an arc-shaped structure as a whole to adapt to the shape of the track 24. An arc-shaped first slot 232 and an arc-shaped second slot 233 are respectively formed on opposite sides of the slider 23. The first slot 232 is engaged with the first groove 211, and the second slot 233 is engaged with the second groove 221, so that the slider 23 can slide in the track 24.
[0066] The present application does not limit the manner in which the second adjustment component 20 forms the track 24. In a modified embodiment of the present application, the second adjustment component 20 may be an integrally formed structure, in which the track 24 is formed instead of by splicing the first track member 21 and the second track member 22. The present application also does not limit the structure of the track 24, and the second adjustment component 20 may form an arc-shaped (e.g., a semicircular track 24 in the present embodiment) track 24.
[0067] Please also read Figure 2-Figure 3 In this embodiment, the fixing assembly 30 includes a first bracket 31 and a second bracket 32 which are separated. The first bracket 31 and the second bracket 32 have the same structure and are both roughly triangular frames. The first bracket 31 has a first vertex area 311, and the first vertex area 311 is provided with a through hole 312. The second bracket 32 has a second vertex area 321, and the second vertex area 321 is provided with a through hole 322. The fixing assembly 30 also includes a first bolt 33 and a second bolt 34. The first bolt 33 fixes the first bracket 31 to one end of the first track member 21 and the second track member 22 through the through hole 312. The second bolt 34 fixes the second bracket 32 to the other end of the first track member 21 and the second track member 22 through the through hole 322.
[0068] In this embodiment, the first bolt 33 and the second bolt 34 are non-standard shoulder screws. The shoulder parts of the first bolt 33 and the second bolt 34 are slidably matched with the first rail member 21 and the second rail member 22, so that the second adjustment assembly 20 can rotate around the third axis z. The threaded parts of the first bolt 33 and the second bolt 34 are matched with nuts to fix the first rail member 21 and the second rail member 22 to the first bracket 31 and the second bracket 32 respectively.
[0069] By connecting the second adjustment assembly 20 to the first bracket 31 and the second bracket 32 respectively, the first adjustment assembly 10 and the second adjustment assembly 20 are erected in the air. When the first bolt 33 and the second bolt 34 are loosened, the second adjustment assembly 20 can rotate around the third axis z, thereby driving the target device 200 to rotate around the third axis z. In this embodiment, the second adjustment assembly 20 and the target device 200 can freely rotate 360° around the third axis z.
[0070] In this embodiment, rubber gaskets (not shown) can be used at the locations connected by bolts (for example, the location where the slider 23 is connected to the connecting portion 112, and the location where the first rail member 21 and the second rail member 22 are connected to the first bracket 31 and the second bracket 32) to make the fixation more secure.
[0071] In this embodiment, the angles of corresponding positions on the first adjustment component 10, the second adjustment component 20 and the fixing component 30 (for example, the surfaces of the first rail member 21 and the second rail member 22 facing the first adjustment component 10, the surface of the slider 23 with the threaded hole 231, the surface of the first bracket 31 and the second bracket 32 facing the second adjustment component 20, etc.) can be marked by forming scale lines or affixing labels, so that the angle change each time the target device 200 is adjusted can be easily read.
[0072] The target device 200 will generate heat during operation. The angle adjustment device 100 as a whole or at least in part (such as the first adjustment component 10 part) is made of a material that is easy to conduct heat, such as metal, which is beneficial to dissipate heat for the target device 200, thereby improving the stability of the target device 200.
[0073] In other embodiments of the present application, the process of adjusting the angle may be mechanically automatic to replace manual adjustment. For example, the angle adjustment component includes a drive component (e.g., a motor), and the drive component connects the first adjustment component 10 and the second adjustment component 20 to drive the first adjustment component 10 and the second adjustment component 20 to rotate.
[0074] In other embodiments of the present application, the angle adjustment device 100 may not include the fixing component 30. In the other embodiments, the angle adjustment device 100 is connected to other devices (such as a fixed machine, a robot arm, etc.) when in use, and the first adjustment component 10 and the second adjustment component 20 can also be supported and fixed.
[0075] In other embodiments of the present application, the angle adjustment device 100 can also be used to fix and adjust the angle of other types of target devices, and the target device 200 is, for example, a spatial light modulator (SLM), a deformable mirror (DM) and other precision optical devices.
[0076] In other embodiments of the present application, the target device 200 may not be an optical device. In this embodiment, since the target device 200 includes a DMD 220, the angle adjustment device 100 is applied to the scene of detecting the performance of the DMD reflected light. In order not to block the propagation path of the incident light and the emitted light, the track 24 in the second adjustment component 20 is semicircular, and the first adjustment component 10 synchronously drives the target device 200 to rotate 180° around the second axis y. When the angle adjustment device 100 is applied to other scenes (no need to detect reflected light), the track 24 formed in the second adjustment component 20 can be a complete circular track, and the first adjustment component 10 can be displaced in the track 24 so that the first adjustment component 10 can rotate 360° around the second axis y, thereby driving the target device 200 to synchronously rotate 360° around the second axis y, which is conducive to further improving the degree of freedom of angle adjustment.
[0077] The following is an example of the process of debugging the target device 200 including the DMD to illustrate the working method of the angle adjustment device 100 in this embodiment: first, the target device 200 is fixed to the assembly portion 111 and placed in an initial angle position. At this time, the connecting member 13, the first bolt 33 and the second bolt 34 are locked, and the angle positions of the first adjustment component 10 and the second adjustment component 20 are fixed and cannot be adjusted; according to experimental needs, one or a combination of the connecting member 13, the first bolt 33 and the second bolt 34 is loosened, so that the first adjustment component 10 and / or the second adjustment component 20 can rotate around the corresponding axis (for example, Figure 6 The figure shows the state of the angle adjustment device 100 after the first adjustment component 10 rotates a certain angle around the first axis x. Figure 7 The figure shows the state of the angle adjustment device 100 after the first adjustment component 10 rotates around the second axis y by a certain angle, or Figure 8 The first adjustment component 10 and the second adjustment component 20 shown in the figure are synchronously rotated around the third axis z by a certain angle, and the state of the angle adjustment device 100 is shown in the figure); after adjusting the target device 200 to the corresponding angle position according to the scale indication, the connecting member 13, the first bolt 33 and the second bolt 34 are locked to fix the angle position of the target device 200; the incident light is controlled to be incident on the effective area 230 of the target device 200, the reflected light from the effective area 230 is received and the optical properties of the reflected light are detected; the previous steps are repeated to detect the reflected light of different target devices 200 at different angles until the detection is completed.
[0078] The angle adjustment device 100 of the present application has a first adjustment component 10 and a second adjustment component 20 that are movably connected. The first adjustment component 10 can rotate around a first axis x and a second axis y respectively. When a target device 200 is mounted on the assembly portion 111, the target device 200 can be synchronously driven to rotate relative to the first axis x and the second axis y. In the process of debugging the target device 200, it is necessary to test the optical properties of the reflected light formed after the incident light is incident on the target device 200 and reflected by the target device 200, and the angle of the target device 200 will affect the optical properties of the reflected light. The angle of the target device 200 can be easily adjusted by the above-mentioned angle adjustment device 100, and the above-mentioned angle adjustment device 100 can respectively rotate the target device 200 around the first axis x and the second axis y, that is, the target device 200 can change its angle in two dimensions, which is beneficial to improving the angle adjustment freedom of the target device 200, so that the angle adjustment device 100 can be applied to a wider range of application scenarios.
[0079] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application and are not intended to be limiting of the present application. As long as they are within the spirit and scope of the present application, appropriate changes and modifications to the above embodiments are within the scope of protection claimed in the present application.
Claims
1. An angle adjustment device, characterized in that: comprising a first adjusting component and a second adjusting component; The first adjustment component comprises a support surface for fixing the target device, the first adjustment component is movably connected to the second adjustment component and can rotate around a first axis, and the first adjustment component can be displaced relative to the second adjustment component; When the first adjustment component rotates around the first axis, it drives the target device to rotate synchronously around the first axis. When the first adjustment component is displaced relative to the second adjustment component, it rotates around the second axis to drive the target device to rotate synchronously around the second axis. The first axis and the second axis have a non-zero angle.
2. The angle adjustment device according to claim 1, characterized in that: The second adjusting component is formed with a track, and the first adjusting component can slide along an extending direction of the track to rotate around the second axis.
3. The angle adjustment device according to claim 2, characterized in that: The track is arc-shaped.
4. The angle adjustment device according to claim 2, characterized in that: The second adjustment assembly includes a first track member and a second track member; A first groove is formed on the first track member, and a second groove is formed on the second track member. The side of the first track member where the first groove is formed and the side of the second track member where the second groove is formed fit together so that the first groove and the second groove together form the track.
5. The angle adjustment device according to claim 4, characterized in that: The second adjustment component also includes a slider, which is located in the track and can slide along the extension direction of the track.
6. The angle adjustment device according to claim 5, characterized in that: The slider is provided with a first card slot and a second card slot on two opposite sides thereof, respectively. The first card slot is engaged with the first groove, and the second card slot is engaged with the second groove.
7. The angle adjustment device according to claim 5, characterized in that: The first adjustment assembly includes a mounting tool, and the mounting tool includes an assembly portion and a connecting portion; The assembly part is used to fix the target device, and the connecting part is fixedly connected to the assembly part and movably connected to the slider.
8. The angle adjustment device according to claim 7, characterized in that: The shape of one side of the connecting portion that movably connects the slider matches the shape of the track.
9. The angle adjustment device according to claim 7, characterized in that: The first adjustment assembly also includes a connecting member, which is connected to the connecting portion and rotatably connected to the slider to rotatably fix the mounting device to the slider and enable the mounting device to rotate around the first axis when the connecting member is loosened relative to the slider.
10. The angle adjustment device according to claim 1, characterized in that: Also included are fixing components; The second adjustment component is connected to the fixed component and can rotate around a third axis; When the second adjustment component rotates around the third axis, the target device is driven to rotate synchronously around the third axis; The third axis has a non-zero angle with the first axis and the second axis respectively.
11. The angle adjustment device according to claim 10, characterized in that: The angle adjustment device at least meets the following requirements: The second adjustment component can rotate 360° around the third axis; or The first axis, the second axis and the third axis are perpendicular to each other; or The fixing assembly includes a first bracket and a second bracket, and the first bracket and the second bracket are respectively connected to two ends of the second adjustment assembly.
12. The angle adjustment device according to claim 10, characterized in that: The fixing assembly includes a first bracket and a second bracket, the first bracket and the second bracket are respectively connected to two ends of the second adjustment assembly, the first bracket and the second bracket are a triangular frame as a whole, and the second adjustment assembly is connected at the top corners of the first bracket and the second bracket.
13. The angle adjustment device according to any one of claims 1 to 12, characterized in that: The first adjustment component can rotate 360° around the first axis to drive the target device to rotate 360° around the first axis synchronously.
14. An optical system, characterized in that: At least comprises a digital micromirror device and an angle adjustment device as described in any one of claims 1 to 13, wherein the digital micromirror device is fixed to the supporting surface by the first adjustment component.