A rotary displacement stage

Abstract

This utility model relates to the field of machining fixtures, specifically to a rotary displacement stage. The rotary displacement stage includes: a base; a worktable for supporting the workpiece to be rotated, the worktable being coaxially arranged with the base and rotatable relative to the base around an axis; a swing arm, one end connected to the worktable, the other end extending radially away from the worktable to form a free end; and an angle control component, the main body of which is mounted on the base, the output end of which abuts against the free end of the swing arm, the output end of the angle control component being axially movable relative to the base to drive the swing arm to swing. The rotary displacement stage provided by this utility model, by converting the linear motion of the angle control component into the curvilinear motion of the worktable, can improve adjustment accuracy compared to directly manually rotating the worktable, achieving high-precision auxiliary adjustment of the microlens array rotation angle.

Description

Technical Field

[0001] This utility model relates to the field of machining fixtures, specifically to a rotary displacement stage. Background Technology

[0002] A light field camera is a specialized camera based on a microlens array. Its working principle involves placing a microlens array between the image sensor and the main lens of a regular camera. Light captured by the main lens is first transmitted to the microlens array, and then from there to the image sensor. The image sensor analyzes and converts the light, recording it digitally. Because light field cameras can control additional light through the microlens array, revealing the depth of field of each image, and projecting tiny secondary images onto the image sensor, the hazy aperture around all focused images becomes "sharp." This approach maintains the increased light intensity, reduced shooting time, and graininess of a regular camera's large aperture without sacrificing depth of field and image sharpness, thus gaining widespread application.

[0003] For light field cameras, the consistency between the rotation angle of the microlens array and the rotation angle of the image sensor directly affects the image quality. Therefore, in the packaging process of light field cameras, it is particularly important to accurately adjust the rotation angle of the microlens array to ensure image quality.

[0004] Existing rotary displacement stages generally consist of a turntable and a base that can rotate relative to each other. During packaging, the microlens array is supported on the turntable, and the rotation of the microlens array is achieved by manually rotating the turntable. Therefore, the accuracy is low and cannot meet the packaging requirements of light field cameras. Utility Model Content

[0005] Therefore, in view of the shortcomings of the prior art, the present invention aims to provide a rotary displacement stage to assist in the high-precision adjustment of the rotation angle of the microlens array during the packaging process of a light field camera.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0007] A rotary displacement stage, comprising:

[0008] Base;

[0009] A worktable is used to support a workpiece to be rotated. The worktable is coaxially arranged with the base, and the worktable can rotate about an axis relative to the base.

[0010] The swing arm has one end connected to the worktable and the other end extending radially away from the worktable to form a free end.

[0011] In addition, an angle control component is provided, the main body of which is disposed on the base, and the output end of which abuts against the free end of the swing arm. The output end of the angle control component can move axially relative to the base to drive the swing arm to swing.

[0012] In one embodiment, a first mounting base and a second mounting base are provided on the base, and the first mounting base and the second mounting base are disposed opposite to each other on both sides of the swing arm. The angle control component includes:

[0013] The drive rod has one end slidably mounted to the first mounting base and the other end abutting against the swing arm;

[0014] A drive source, mounted on the first mounting base and connected to the drive rod, is used to drive the drive rod to slide relative to the first mounting base;

[0015] A stop is mounted on the second mounting base and abuts against the swing arm. The stop can elastically deform as the swing arm rotates.

[0016] In one embodiment, the angle control component further includes a locking member for locking or unlocking the stop member at a certain deformation position.

[0017] In one embodiment, the stop includes:

[0018] The sleeve is fixed on the second mounting base.

[0019] The ejector pin has one end abutting against the swing arm, and the other end slidingly housed in the sleeve.

[0020] In addition, a spring is housed within the sleeve, with one end connected to the sleeve and the other end connected to the ejector pin. When the ejector pin slides along the sleeve, the spring undergoes elastic deformation.

[0021] In one embodiment, the locking element is a locking screw, one end of which is threadedly fitted to the sleeve, and the other end is movably housed within the sleeve and can be in contact with or separated from the ejector pin.

[0022] In one embodiment, the drive source includes a micrometer knob and a ten-thousand-meter knob threadedly fitted to the drive rod, the micrometer knob and the ten-thousand-meter knob being connected via a differential threaded pair.

[0023] In one embodiment, the rotary displacement stage further includes a crossed roller bearing and a turntable, the outer ring of the crossed roller bearing is connected to the base, the inner ring of the crossed roller bearing is connected to the turntable, and the worktable and the swing arm are both disposed on the turntable.

[0024] The technical solution of this utility model has the following advantages:

[0025] 1. The rotary displacement stage provided by this utility model allows the microlens array to be placed on the worktable during the packaging process of a light field camera. Then, the axial movement of the angle control component controls the rotation of the swing arm, thereby driving the worktable to rotate. This makes the rotation angle of the microlens array aligned with the rotation angle of the photosensitive chip. This adjustment method, by converting the linear motion of the angle control component into the curvilinear motion of the worktable, can improve the adjustment accuracy compared to directly rotating the worktable manually, and achieve high-precision auxiliary adjustment of the rotation angle of the microlens array. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the rotary displacement stage in Embodiment 1 of this utility model;

[0028] Figure 2 for Figure 1 The exploded view of the rotary displacement stage is shown.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Base; 2. Worktable; 3. Swing arm; 4. Angle control assembly; 41. Drive rod; 42. Drive source; 421. Micrometer knob; 422. Dimensity knob; 43. Stop; 431. Sleeve; 432. Ejector pin; 44. Locking component; 5. Cross roller bearing; 6. Turntable; 7. First mounting base; 8. Second mounting base. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0035] Please see Figure 1-2 This utility model relates to a rotary displacement stage, which is used to assist in the rotation of a workpiece, for example, in the packaging process of a light field camera, to assist in adjusting the rotation angle of a microlens array.

[0036] In one embodiment, the rotary displacement stage includes a base 1, a worktable 2, a swing arm 3, and an angle control assembly 4.

[0037] The worktable 2 is used to support a rotating workpiece, such as a microlens array. The worktable 2 is coaxially arranged with the base 1 and can rotate about an axis relative to the base 1. One end of the swing arm 3 is connected to the worktable 2, and the other end extends radially away from the worktable 2 to form a free end. The main body of the angle control component 4 is mounted on the base 1, and its output end abuts against the free end of the swing arm 3. The output end of the angle control component 4 can move axially relative to the base 1, thereby driving the swing arm 3 to swing.

[0038] During the packaging process of the light field camera, the microlens array can be placed on the worktable 2. Then, the axial movement of the angle control component 4 controls the rotation of the swing arm 3, thereby driving the worktable 2 to rotate. This makes the rotation angle of the microlens array aligned with the rotation angle of the photosensitive chip. This adjustment method, by converting the linear motion of the angle control component 4 into the curvilinear motion of the worktable 2, can improve the adjustment accuracy compared to directly rotating the worktable 2, and achieve high-precision auxiliary adjustment of the rotation angle of the microlens array.

[0039] In one embodiment, the rotary displacement stage includes a crossed roller bearing 5 and a turntable 6. The outer ring 5 of the crossed roller bearing 5 is connected to the base 1, and the inner ring of the crossed roller bearing 5 is connected to the turntable 6. The worktable 2 and the swing arm 3 are both mounted on the turntable 6, thereby achieving a coaxial connection between the worktable 2 and the base 1.

[0040] In one embodiment, the base 1 is provided with a first mounting seat 7 and a second mounting seat 8, and the angle control component 4 includes a drive rod 41, a drive source 42 and a stop member 43.

[0041] Specifically, the first mounting base 7 and the second mounting base 8 are disposed opposite each other on both sides of the swing arm 3. One end of the drive rod 41 is slidably assembled with the first mounting base 7, and the other end abuts against the swing arm 3. The drive source 42 is mounted on the first mounting base 7 and connected to the drive rod 41, and the drive source 42 is used to drive the drive rod 41 to slide relative to the first mounting base 5. The stop member 43 is mounted on the second mounting base 8, and the stop member 43 also abuts against the swing arm 3. The stop member 43 can elastically deform as the swing arm 3 rotates.

[0042] When the worktable 2 is to be rotated, the drive rod 41 can be driven to slide along the first mounting base 7 by the drive source 42. Since the drive rod 41 abuts against the swing arm 3, the swing arm 3 will rotate during the sliding of the drive rod 41, thereby driving the worktable 2 to rotate. The stop 43 ensures that the swing arm 3 continues to abut against the drive rod 41 during the swinging process without separating from the drive rod 41, thereby achieving stable rotation of the worktable 2.

[0043] In one embodiment, the drive source 42 includes a micrometer knob 421 and a ten-thousand-degree knob 422. Both the micrometer knob 421 and the ten-thousand-degree knob 422 are threadedly assembled with the drive rod 21, and the micrometer knob 421 and the ten-thousand-degree knob 422 are connected by a differential threaded pair.

[0044] When rotating the worktable 2, you can first make a coarse adjustment using the micrometer knob 421, and then make a fine adjustment using the ten-thousandth knob 422, thereby further improving the adjustment accuracy.

[0045] In other embodiments, the drive source 42 may also be other components that can provide driving force, such as a motor or a cylinder.

[0046] In one embodiment, the stop 43 includes a sleeve 431, a pin 432, and a spring (not shown).

[0047] Specifically, sleeve 431 is fixed on the second mounting base 8. One end of ejector pin 432 abuts against the rocker arm 3, and the other end is slidably housed inside sleeve 431. Spring is housed inside sleeve 431, with one end connected to sleeve 431 and the other end connected to ejector pin 432. When ejector pin 432 slides along sleeve 431, spring undergoes elastic deformation.

[0048] During the rotation of the worktable 2, since the swing arm 3 is pressed against the ejector pin 432, the swing arm 3 will drive the ejector pin 432 to slide inside the sleeve 431 by compressing the spring. As a result, the elastic force generated by the spring will drive the swing arm 3 to move in the direction and press against the drive rod 41, thereby preventing the drive rod 41 from disengaging from the swing arm 3 and ensuring the stability of the rotation of the worktable 2.

[0049] In other embodiments, the stop 43 may also be other components that can undergo elastic deformation, such as elastic gaskets.

[0050] In one embodiment, the angle control component 4 further includes a locking member 44. The locking member 44 is used to lock or partially lock the stop member 43 when it deforms to a predetermined degree. By providing the locking member 44, the stop member 43 can be locked after the worktable 2 rotates to the required angle. At this time, the swing arm 3 is restricted by the locked stop member 43 and the drive rod 41 and cannot continue to swing, thereby fixing the position of the worktable 2, which is beneficial for maintaining the rotation angle of the microlens array stably during the packaging process.

[0051] In one embodiment, the locking element 44 is a locking screw, with one end threaded into the sleeve 431 and the other end movably housed within the sleeve 431, capable of engaging or disengaging from the ejector pin 432. This configuration allows the locking screw to be rotated to disengage from the ejector pin 432 when the worktable 2 is to be rotated, enabling the ejector pin 432 to slide within the sleeve 431. Once the worktable 2 has reached the desired position, the locking screw can be rotated to engage with the ejector pin 432, preventing it from sliding further within the sleeve 431 and thus locking the position of the worktable 2. This design is simple and convenient to use.

[0052] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A rotary displacement stage, characterized in that, include: Base; A worktable is used to support a workpiece to be rotated. The worktable is coaxially arranged with the base, and the worktable can rotate about an axis relative to the base. The swing arm has one end connected to the worktable and the other end extending radially away from the worktable to form a free end. And an angle control component, the main body of which is disposed on the base, the output end of which abuts against the free end of the swing arm, the output end of the angle control component can move axially relative to the base to drive the swing arm to swing. The base is provided with a first mounting seat and a second mounting seat, and the first mounting seat and the second mounting seat are arranged opposite to each other on both sides of the swing arm. The angle control component includes: The drive rod has one end slidably mounted to the first mounting base and the other end abutting against the swing arm; A drive source, mounted on the first mounting base and connected to the drive rod, is used to drive the drive rod to slide relative to the first mounting base; A stop is installed on the second mounting base and abuts against the swing arm. The stop can elastically deform as the swing arm rotates. The angle control component also includes a locking component for locking or unlocking the stop member at a certain deformation position; The rotary displacement stage further includes a crossed roller bearing and a turntable. The outer ring of the crossed roller bearing is connected to the base, and the inner ring of the crossed roller bearing is connected to the turntable. Both the worktable and the swing arm are mounted on the turntable.

2. The rotary displacement stage according to claim 1, characterized in that, The stop member includes: The sleeve is fixed on the second mounting base. The ejector pin has one end abutting against the swing arm, and the other end slidingly housed in the sleeve. In addition, a spring is housed within the sleeve, with one end connected to the sleeve and the other end connected to the ejector pin. When the ejector pin slides along the sleeve, the spring undergoes elastic deformation.

3. The rotary displacement stage according to claim 2, characterized in that, The locking component is a locking screw. One end of the locking screw is threadedly fitted to the sleeve, and the other end is movably housed in the sleeve and can be in contact with or separated from the ejector pin.

4. The rotary displacement stage according to any one of claims 2-3, characterized in that, The drive source includes a micrometer knob and a ten-thousand-meter knob that are threadedly assembled with the drive rod. The micrometer knob and the ten-thousand-meter knob are connected by a differential thread pair.

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