Optical slit structure

Abstract

The invention discloses an optical slit structure, which belongs to the field of imaging devices, and is characterized in that a first motor is in transmission connection with one lead screw nut, a second motor is in transmission connection with the other lead screw nut, a first mounting seat is matched with one lead screw nut, and a second mounting seat is matched with the other lead screw nut; the two blades are fixedly installed on the first installation base and the second installation base respectively, the first motor drives one blade to move through the lead screw nut and the first installation base, the second motor drives the other blade to move through the lead screw nut and the second installation base, a slit is formed between the two blades, transmission is achieved through the motors and the lead screw nut, and the transmission precision is high; the mounting seat is directly matched with the screw rod nut, so that the structure is simplified, and the overall size of the optical slit structure is small.

Description

Technical Field

[0001] This invention relates to the field of imaging devices, and in particular to an optical slit structure. Background Technology

[0002] An optical slit structure is a device that uses slit technology for high-precision imaging, and is widely used in medical imaging, spectral analysis, optical detection, and other fields. Its core principle is to constrain light beams or X-rays by controlling the slit width, thereby obtaining high-resolution, low-distortion images.

[0003] Existing optical slit structures have low transmission accuracy when adjusting the slit position, and their overall structure is large, which is not conducive to the miniaturization of equipment. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, one of the objectives of this invention is to provide an optical slit structure with high transmission accuracy and small overall size.

[0005] One of the objectives of this invention is achieved through the following technical solution: An optical slit structure includes two blades, a first motor, a second motor, two lead screws and nuts, a first mounting base, and a second mounting base. The first motor is driven by one of the lead screws and nuts, and the second motor is driven by the other lead screw and nut. The first mounting base cooperates with one of the lead screws and nuts, and the second mounting base cooperates with the other lead screw and nut. The two blades are respectively fixedly mounted on the first mounting base and the second mounting base. The first motor drives one blade to move through the lead screw and nut and the first mounting base, and the second motor drives the other blade to move through the lead screw and nut and the second mounting base, forming a slit between the two blades.

[0006] Furthermore, the optical slit structure also includes two elastic elements, each of which is mounted on a lead screw nut, with both ends of the elastic element abutting against the lead screw nut and the first mounting base or the second mounting base, respectively.

[0007] Furthermore, the elastic element is sleeved on the lead screw nut.

[0008] Furthermore, the optical slit structure also includes a gasket, which is mounted on the lead screw nut, and the end of the elastic element abuts against the first mounting base or the second mounting base through the gasket.

[0009] Furthermore, the first mounting base is provided with a first mounting groove, the inner wall of the first mounting groove is provided with a first protrusion, the lead screw nut is located in the first mounting groove, and the gasket abuts against the first protrusion.

[0010] Furthermore, the first protrusion is arc-shaped.

[0011] Furthermore, the optical slit structure also includes a first fixing plate, a second fixing plate, and guide rods. The first motor is fixed to the first fixing plate, the second motor is fixed to the second fixing plate, and there are two guide rods. The two ends of each guide rod are respectively fixed to the first fixing plate and the second fixing plate. The first mounting base and the second mounting base are slidably mounted on the two guide rods.

[0012] Furthermore, the two guide rods are parallel to each other.

[0013] Furthermore, the optical slit structure also includes a mounting plate, with the first fixing plate and the second fixing plate respectively fixed to opposite ends of the mounting plate, and the first fixing plate and the second fixing plate being symmetrically arranged about the mounting plate.

[0014] Furthermore, the two lead screw nuts are located on the same straight line.

[0015] Compared to existing technologies, the optical slit structure of this invention features a first motor connected to a lead screw and nut, a second motor connected to another lead screw and nut, a first mounting base that engages with a lead screw and nut, and a second mounting base that engages with another lead screw and nut. Two blades are respectively fixedly mounted on the first and second mounting bases. The first motor drives one blade to move via the lead screw and nut and the first mounting base, while the second motor drives the other blade to move via the lead screw and nut and the second mounting base. A slit is formed between the two blades. By employing a motor and lead screw and nut transmission, high transmission accuracy is achieved. By directly engaging the mounting base with the lead screw and nut, the structure is simplified, resulting in a smaller overall size of the optical slit structure. Attached Figure Description

[0016] Figure 1 This is a perspective view of the optical slit structure of the present invention; Figure 2 for Figure 1 An exploded three-dimensional view of the optical slit structure; Figure 3 for Figure 2 A three-dimensional view of the mounting plate of the optical slit structure; Figure 4 for Figure 2 A perspective view of the first mounting base of the optical slit structure; Figure 5 for Figure 2 A perspective view of the second mounting base of the optical slit structure; Figure 6 for Figure 2 A three-dimensional view of the first fixing plate of the optical slit structure; Figure 7 for Figure 2 A perspective view of the second fixing plate of the optical slit structure; Figure 8 for Figure 1 A partial three-dimensional view of the optical slit structure.

[0017] In the diagram: 1. Mounting plate; 101. First positioning block; 102. Second positioning block; 103. Plate body; 2. First mounting base; 21. First through hole; 22. First fixing groove; 23. First snap-fit ​​groove; 24. First mounting groove; 25. First protrusion; 3. Second mounting base; 31. Second through hole; 32. Second fixing groove; 33. Second snap-fit ​​groove; 34. Second mounting groove; 35. Second protrusion; 4. First fixing plate; 41. First placement block; 42. First contact surface; 43. First clearance hole; 44. Second clearance hole; 45. Third mounting groove; 5. Second fixing plate; 51. Second placement block; 52. Second contact surface; 53. Third clearance hole; 54. Fourth clearance hole; 55. Fourth mounting groove; 6. First motor; 7. Second motor; 8. Lead screw nut; 9. Guide rod; 10. Elastic element; 11. Washer; 12. Blade. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or it can be fixed through another intermediate component. When a component is said to be "connected to" another component, it can be directly connected to the other component or it may be fixed through another intermediate component. When a component is said to be "set on" another component, it can be set directly on the other component or it may be set through another intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Please see Figure 1 as well as Figure 2 The optical slit structure of this application includes a mounting plate 1, a first mounting base 2, a second mounting base 3, a first fixing plate 4, a second fixing plate 5, a first motor 6, a second motor 7, a lead screw nut 8, a guide rod 9, an elastic element 10, a gasket 11, and a blade 12.

[0022] Please see Figure 3 Mounting plate 1 is used to fix the first fixing plate 4 and the second fixing plate 5. Mounting plate 1 includes a plate body 103, a first positioning block 101, and a second positioning block 102. The first positioning block 101 and the second positioning block 102 both extend from the plate body 103 and are located on the same straight line. The first positioning block 101 abuts against the first fixing plate 4 to position the first fixing plate 4 relative to the mounting plate 1, thereby locking the first fixing plate 4 and the mounting plate 1. The second positioning block 102 abuts against the second fixing plate 5 to position the second fixing plate 5 relative to the mounting plate 1, thereby locking the second fixing plate 5 and the mounting plate 1.

[0023] Please see Figure 4 The first mounting base 2 is used to fix a blade 12 and drive the blade 12 to move, thereby adjusting the width and / or position of the slit. The first mounting base 2 is provided with a first through hole 21, a first fixing groove 22, a first snap-fit ​​groove 23, a first mounting groove 24, and a first protrusion 25. The first through hole 21 is used to install a guide rod 9, and the first fixing groove 22 is used to install another guide rod 9, so that the first mounting base 2 and the second mounting base 3 can move along the guide rod 9. The first snap-fit ​​groove 23 is used to install the blade 12. The first mounting groove 24 is an open structure, and the lead screw nut 8 is installed in the first mounting groove 24. The inner wall of the first mounting groove 24 is provided with a first protrusion 25, which is arc-shaped. When the lead screw nut 8 moves, the lead screw nut 8 abuts against the first protrusion 25, thereby causing the first mounting base 2 to drive the blade 12 to move.

[0024] Please continue reading. Figure 5 The structure of the second mounting base 3 is the same as that of the first mounting base 2. The second mounting base 3 has a second through hole 31, a second fixing groove 32, a second snap-fit ​​groove 33, a second mounting groove 34, and a second protrusion 35. The second through hole 31 is used to install a guide rod 9, and the second fixing groove 32 is used to install another guide rod 9, allowing the second mounting base 3 to move along the guide rod 9. The second snap-fit ​​groove 33 is used to install another blade 12. The second mounting groove 34 is an open structure, and another lead screw nut 8 is installed in the second mounting groove 34. The second protrusion 35 is located on the inner wall of the second mounting groove 34 and is arc-shaped. When the other lead screw nut 8 moves, it abuts against the second protrusion 35, thereby causing the second mounting base 3 to move the other blade 12.

[0025] Please continue reading. Figure 6 The first fixing plate 4 is used to fix the first motor 6 and the guide rod 9. The first fixing plate 4 includes a first mounting block 41 and is provided with a first clearance hole 43, a second clearance hole 44 and a third mounting groove 45. The first mounting block 41 is provided with a first abutting surface 42, which abuts against the first positioning block 101 to position the first mounting block 41 and the mounting plate 1. The first clearance hole 43 and the second clearance hole 44 are used to fix the two guide rods 9. The third mounting groove 45 is used to install the lead screw nut 8.

[0026] Please continue reading. Figure 7 The second fixing plate 5 includes a second mounting block 51 and is provided with a third clearance hole 53, a fourth clearance hole 54, and a fourth mounting groove 55. The second mounting block 51 is provided with a second abutting surface 52, which abuts against the second positioning block 102 to position the second mounting block 51 against the mounting plate 1. The third clearance hole 53 and the fourth clearance hole 54 are used to fix the two guide rods 9. The fourth mounting groove 55 is used to install the lead screw nut 8.

[0027] Please continue reading. Figure 1 The first motor 6 is fixed to the first fixed plate 4 and is connected to a lead screw nut 8. The rotation of the first motor 6 moves the nut on the lead screw nut 8. The second motor 7 is fixed to the second fixed plate 5 and is connected to another lead screw nut 8. The rotation of the second motor 7 moves the nut on the lead screw nut 8.

[0028] One guide rod 9 passes through the first through hole 21 of the first mounting base 2 and the second through hole 31 of the second mounting base 3, and both ends of the guide rod 9 are fixed to the first fixing plate 4 and the second fixing plate 5. Another guide rod 9 passes through the first fixing groove 22 of the first mounting base 2 and the second fixing groove 32 of the second mounting base 3, and both ends of the guide rod 9 are fixed to the first fixing plate 4 and the second fixing plate 5.

[0029] Please continue reading. Figure 8 There are two elastic elements 10, each mounted on a lead screw nut 8. Specifically, each elastic element 10 is a spring, sleeved on the lead screw nut 8. One end of the elastic element 10 abuts against the lead screw nut 8, and the other end contacts a washer 11 mounted on the lead screw nut 8. By using the elastic elements 10 and the washer 11, the driving force of the motor can be softened, preventing damage to the first mounting base 2 and the second mounting base 3.

[0030] Two blades 12 are fixed to the first mounting base 2 and the second mounting base 3, respectively. The end of each blade 12 is tapered, and a slit is formed between the two blades 12.

[0031] When using the optical slit structure, the first motor 6 rotates, driving the lead screw nut 8 to move linearly along the motor drive shaft. When the lead screw nut 8 moves towards the end of the drive shaft, it pushes the elastic element 10 towards the shaft end, compressing the elastic element 10. Under the action of the elastic element 10, it pushes the washer 11 towards the shaft end. Since the washer 11 contacts the first protrusion 25 of the first mounting seat 2, the first mounting seat 2 is also pushed towards the shaft end. Because the blade 12 is fixedly mounted on the first mounting seat 2, the blade 12 moves in the same direction as the first mounting seat 2. When the lead screw nut 8 moves towards the tail of the motor shaft, since the lead screw nut 8 contacts the first protrusion 25 of the first mounting seat 2, the first mounting seat 2 is pushed towards the tail, which in turn pushes the washer 11 to compress the elastic element 10, causing the washer 11 and the elastic element 10 to move in the same direction. Under the elastic force of the elastic element 10, the lead screw nut on the other side also moves towards the tail of the drive shaft.

[0032] Because the two drive motors are arranged opposite each other, when the drive shafts of the two motors rotate in opposite directions, the two blades 12 move towards each other. When the blades 12 reach their limit positions, there is a certain gap between the tips of the blades 12. When the rotation directions are the same, the blades 12 move simultaneously towards one motor and away from the other. When a spectrum containing different wavelengths shines on the surface of the blades 12, the wavelengths located at the gap position of the blades 12 can pass through the slit, while the wavelengths at other positions are blocked by the blade surface and cannot pass through. When wavelengths of other wavelengths need to pass through the slit, the left and right motors rotate in the same direction, causing the blades 12 to move synchronously in one direction while maintaining the working gap. At this time, light of different wavelengths can pass through the slit, achieving the selection of different wavelengths.

[0033] In this invention, the optical slit structure features a first motor 6 connected to a lead screw nut 8, a second motor 7 connected to another lead screw nut 8, a first mounting base 2 fitted with a lead screw nut 8, and a second mounting base 3 fitted with another lead screw nut 8. Two blades 12 are respectively fixedly mounted on the first mounting base 2 and the second mounting base 3. The first motor 6 drives one blade 12 to move via the lead screw nut 8 and the first mounting base 2, and the second motor 7 drives the other blade 12 to move via the lead screw nut 8 and the second mounting base 3. A slit is formed between the two blades 12. By using a motor and lead screw nut 8 for transmission, high transmission accuracy is achieved. By directly fitting the mounting base to the lead screw nut 8, the structure is simplified, resulting in a smaller overall size of the optical slit structure.

[0034] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These are all equivalent modifications and improvements made to the above embodiments based on the essential technology of the present invention, and all of these fall within the protection scope of the present invention.

Claims

1. An optical slit structure comprising two blades, characterized in that: The optical slit structure further includes a first motor, a second motor, two lead screws and nuts, a first mounting base, and a second mounting base. The first motor is driven by one of the lead screws and nuts, and the second motor is driven by the other lead screw and nut. The first mounting base cooperates with one of the lead screws and nuts, and the second mounting base cooperates with the other lead screw and nut. The two blades are respectively fixedly mounted on the first mounting base and the second mounting base. The first motor drives one blade to move through the lead screw and nut and the first mounting base, and the second motor drives the other blade to move through the lead screw and nut and the second mounting base, forming a slit between the two blades.

2. The optical slit structure according to claim 1, characterized in that: The optical slit structure also includes two elastic elements, each of which is mounted on a lead screw nut. The two ends of the elastic element respectively abut against the lead screw nut and the first mounting seat or the second mounting seat.

3. The optical slit structure according to claim 2, characterized in that: The elastic element is sleeved on the lead screw nut.

4. The optical slit structure according to claim 2, characterized in that: The optical slit structure also includes a gasket, which is installed on the lead screw nut, and the end of the elastic element abuts against the first mounting base or the second mounting base through the gasket.

5. The optical slit structure according to claim 4, characterized in that: The first mounting base is provided with a first mounting groove, the inner wall of the first mounting groove is provided with a first protrusion, the lead screw nut is located in the first mounting groove, and the gasket abuts against the first protrusion.

6. The optical slit structure according to claim 5, characterized in that: The first protrusion is arc-shaped.

7. The optical slit structure according to claim 1, characterized in that: The optical slit structure further includes a first fixing plate, a second fixing plate, and guide rods. The first motor is fixed to the first fixing plate, the second motor is fixed to the second fixing plate, and there are two guide rods. The two ends of each guide rod are fixed to the first fixing plate and the second fixing plate, respectively. The first mounting base and the second mounting base are slidably mounted on the two guide rods.

8. The optical slit structure according to claim 7, characterized in that: The two guide rods are parallel to each other.

9. The optical slit structure according to claim 7, characterized in that: The optical slit structure also includes a mounting plate, with the first fixing plate and the second fixing plate respectively fixed to opposite ends of the mounting plate, and the first fixing plate and the second fixing plate being symmetrically arranged about the mounting plate.

10. The optical slit structure according to claim 1, characterized in that: The two lead screw nuts are located on the same straight line.

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