An Angle Detection Device for Filter Installation in an Optical Device

Abstract

The present invention discloses a device for detecting the installation angle of filters for optical devices, relating to the technical field of filter production. The device comprises a device body, a laser lamp body fixedly mounted on the top of the device body, and an angle adjustment device disposed within the device body. The angle adjustment device comprises a U-shaped frame fixed to the left side of the inner wall of the device body, with swivels penetrating and rotatably mounted on both the front and back sides of the inner wall of the U-shaped frame. The angle adjustment device enables the U-shaped plate, a protruding rod, a swivel, an arc-shaped through-slot plate, and a receiving plate to cooperate to change the angle at which the laser light from the laser lamp body impinges on the filter of the tube body, thereby facilitating the measurement of the filter offset angle from multiple angles. Simultaneously, the threaded rod and L-shaped slider cooperate to drive the angle of the receiving plate to change, allowing the receiving plate to adaptively adjust to the different installation angles of the filter within the tube body.

Description

Technical Field

[0001] The present invention relates to the technical field of filter production, in particular to a filter installation angle detection device for optical devices. Background Art

[0002] The filter is an optical device used to select the required radiation band. During the filter installation and production process, the filter needs to be mounted in the cavity of the tube body. At this time, the angle of the filter needs to be detected.

[0003] Patent publication number CN214474113U discloses a device for detecting the installation angle of filters used in optical devices. The device comprises a light source, a first baffle and a second baffle arranged perpendicular to each other. Adjacent sides of a tube to be tested are respectively abutted against the first and second baffles. Light emitted by the light source passes through a light inlet in the tube and strikes the filter within the tube to be tested. After being reflected by the filter, it passes through a light outlet in the tube and is projected onto a light target equipped with an indicator ring. This device directly detects the installation angle of the filter using visible light (red light), offering intuitive and highly visible detection and easy placement. By displaying the position of the reflected light beam on the target and its relative position to the indicator ring, it is easy to determine whether the filter is properly installed and its actual deviation angle tendency.

[0004] However, the current angle detection device has the following problems: when measuring the angle of the filter installed in the tube body, the angle detection device does not fix the position of the tube body. Therefore, the tube body is easily affected by external factors and its position shifts, which affects the accuracy of the filter angle measurement. Therefore, we propose an angle detection device for installing filters for optical devices. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a device for detecting the installation angle of filters for optical devices, which solves the problem proposed in the above background technology that when the angle detection device measures the angle of the filter installed in the tube body, the position of the tube body is not fixed, so the tube body is easily affected by external factors and the position is shifted, thereby affecting the accuracy of the filter angle measurement.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a filter installation angle detection device for an optical device, comprising a device body, a laser lamp body fixedly mounted on the top of the device body, an angle adjustment device provided inside the device body, the angle adjustment device comprising a U-shaped frame, the U-shaped frame being fixed to the left side of the inner wall of the device body, a swivel being passed through and rotatably mounted on the front and back sides of the inner wall of the U-shaped frame, a bump rod being passed through and slidably mounted on the opposite sides of the two swivels, an arc-shaped through-groove plate being fixed on the side of the bump rod away from the inner wall of the U-shaped frame, a spring being provided between the arc-shaped through-groove plate and the inner wall of the U-shaped frame, an end of the bump rod away from the arc-shaped through-groove plate slidingly passing through the inner and outer sides of the U-shaped plate, the middle part of the U-shaped plate being convex, and a spring being provided between the convex part of the U-shaped plate and the top surface of the U-shaped frame The U-shaped frame is hinged with a receiving plate on the right side of the inner wall of the U-shaped frame, and a torsion spring is provided between the receiving plate and the inner wall of the U-shaped frame. The U-shaped plate drives the swivel and the arc-shaped slot plate to rotate through the protruding block rod, and the U-shaped plate drives the receiving plate to rotate synchronously, and the arc-shaped slot plate drives the angle of the tube body to change, thereby changing the angle of the laser of the laser lamp main body on the filter of the tube body, thereby facilitating the measurement of the filter offset angle at multiple angles. Slide grooves are provided on both sides of the receiving plate, and a threaded rod is installed on the top right side of the U-shaped frame through the rotation of the frame plate, and an L-shaped slider is connected to the outer side of the threaded rod, and the end of the L-shaped slider away from the threaded rod is slidably connected to the inside of the slide groove of the receiving plate. At the same time, the threaded rod drives the L-shaped slider to push the angle of the receiving plate to change, so that the receiving plate can be adaptively adjusted according to the different installation angles of the filter in the tube body.

[0007] Preferably, an anti-adhesion device is provided at the bottom left side of the U-shaped frame, and the anti-adhesion device includes a fan and a triangular guide arc plate. The fan is fixed to the bottom left side of the U-shaped frame, and a filter is provided at the air inlet of the fan. An L-shaped tube is fixed at the air outlet of the fan, and the end of the L-shaped tube away from the fan is fixedly connected to the bottom of the fixed ring. The fixed ring is embedded in the inside of the U-shaped frame, and the fixed ring is sleeved on the outside of the rotating ring. There are two triangular guide arc plates, and the two triangular guide arc plates are respectively fixed at the inner walls of the opposite sides of the two arc-shaped through-groove plates. The L-shaped tube and the fixed The interior of the ring is through-connected, and the bottoms of the protruding rod and the rotating ring are provided with through holes that penetrate the interior of the fixed ring. The inner wall of the arc-shaped slot plate close to the protruding rod is provided with a through opening, and the through opening is facing the middle of the triangular guide arc plate. The fan blows air into the interior of the fixed ring through the L-shaped tube. Under the guiding action of the triangular inclined surfaces of the rotating ring, the protruding rod and the triangular guide arc plate, the airflow will adhere to the arc-shaped slot plate and be blown off, thereby avoiding the problem of impurities adhering to the arc-shaped slot plate, which causes the arc-shaped slot plate to deviate from the clamping position of the tube body, thereby improving the accuracy of the angle measurement of the filter.

[0008] Preferably, the top and bottom of the arc-shaped through-slot plate are provided with auxiliary clamping devices, and the auxiliary clamping devices include clamping plates, and there are two clamping plates, which are slidably mounted on the top and bottom of the arc-shaped through-slot plate respectively, and spring plates are provided between the opposite sides of the two clamping plates and the top and bottom of the arc-shaped through-slot plate respectively, and the end of the clamping plate away from the protruding rod is serrated. Under the elastic force of the spring plate, the spring plate pushes the clamping plate to further clamp the tube body, thereby improving the stability of the angle measurement of the filter, and at the same time the serrated part of the clamping plate increases In order to increase the friction force of clamping the tube body, a through hole is opened in the middle of the spring plate, and a swing plate is fixed to the inner wall of the side of the spring plate away from the clamping plate. Through holes are opened at the top and bottom of the arc-shaped slot plate, and the swing plate is opposite to the through hole of the arc-shaped slot plate. At the same time, the clamping plate resists the spring plate and deforms, and the clamping plate drives the swing plate to tilt up, so that the swing plate guides the wind flow generated by the fan to the upper and lower positions of the tube body, thereby avoiding the problem of dust or impurities falling on the filter plate when the filter plate in the tube body is measured, thereby reducing dust adhesion and improving the performance of the filter plate.

[0009] Preferably, a focusing device is provided on the top of the inner wall of the device body, and the focusing device includes a fixing frame, which is fixed to the top of the focusing device. Two pinhole plates are fixed on the inner wall of the fixing frame from top to bottom, and both pinhole plates are located directly below the laser lamp body. At the same time, the pinholes of the pinhole plates will limit the laser emitted by the laser lamp body, thereby ensuring that the laser of the laser lamp body propagates in a straight line to the center of the filter, thereby avoiding the problem of displacement of the lamp head of the laser lamp body after long-term use, thereby The accuracy of the angle measurement of the filter is further improved. The outer wall of the pinhole plate below is provided with a scale plate. Two sleeve plates are slidably installed on the outer side of the pinhole plate below. The end of the sleeve plate away from the pinhole plate is rotatably connected to the outer wall of the annular groove plate. The annular groove plate is fixed on the side of the arc-shaped through-groove plate close to the protrusion rod. At the same time, the arc-shaped through-groove plate drives the sleeve plate to move along the outer wall of the pinhole plate below through the annular groove plate. By observing the positions of the scale plates corresponding to the two sleeve plates on the pinhole plate below, it is determined whether the tube body is directly below the laser lamp body, thereby reducing the measurement error.

[0010] The present invention provides a device for detecting the installation angle of a filter for an optical device. It has the following beneficial effects:

[0011] (1) The present invention provides an angle adjustment device, so that the U-shaped plate, the protruding rod, the rotating ring, the arc-shaped slot plate and the receiving plate cooperate to change the angle at which the laser light of the laser lamp body is projected onto the filter of the tube body, thereby facilitating the measurement of the filter offset angle at multiple angles; at the same time, the threaded rod and the L-shaped slider cooperate to drive the angle of the receiving plate to change, so that the receiving plate can be adaptively adjusted according to the different installation angles of the filter in the tube body.

[0012] (2) The present invention provides an anti-adhesion device, so that the blower, L-shaped tube, fixed ring, rotating ring, protruding rod and triangular guide arc plate cooperate to blow off the airflow adhering to the arc-shaped slot plate, thereby avoiding the problem of impurities adhering to the arc-shaped slot plate, which causes the arc-shaped slot plate to have a deviation in the clamping position of the tube body, thereby improving the accuracy of the angle measurement of the filter.

[0013] (3) The present invention provides an auxiliary clamping device so that the spring plate and the clamping plate cooperate to clamp the tube body, thereby improving the stability of the angle measurement of the filter. At the same time, the serrated portion of the clamping plate increases the friction force of clamping the tube body. At the same time, the clamping plate and the spring plate cooperate to drive the swing plate to tilt up, so that the swing plate guides the wind flow generated by the fan to the upper and lower positions of the tube body, thereby avoiding the problem of dust or impurities falling on the filter when measuring the filter in the tube body, thereby reducing the adhesion of dust and improving the performance of the filter.

[0014] (4) The present invention sets a focusing device so that the pinhole of the pinhole plate limits the laser emitted by the laser lamp body, thereby ensuring that the laser of the laser lamp body propagates in a straight line to the center of the filter, thereby avoiding the problem of displacement of the lamp head of the laser lamp body after long-term use of the laser lamp body, thereby further improving the accuracy of the angle measurement of the filter; at the same time, the arc-shaped through-groove plate drives the sleeve plate to move through the ring groove plate, and by observing the position of the scale plate corresponding to the pinhole plate below the two sleeve plates, it is judged whether the tube body is directly below the laser lamp body, thereby reducing the measurement error. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the present invention as a whole;

[0016] Figure 2 is a partial cross-sectional schematic diagram of the angle adjustment device of the present invention;

[0017] Figure 3 It is a partial structural diagram of the angle adjustment device of the present invention;

[0018] Figure 4 is a partial cross-sectional schematic diagram of the anti-adhesion device of the present invention;

[0019] Figure 5is a schematic diagram of the auxiliary clamping device of the present invention;

[0020] Figure 6 Schematic diagram of the focusing device of the present invention.

[0021] In the figure: 1. Device body; 2. Laser light body; 3. Angle adjustment device; 31. U-shaped frame; 32. Arc-shaped through-slot plate; 33. U-shaped plate; 34. Bump rod; 35. Rotating ring; 36. Receiving plate; 37. Threaded rod; 38. L-shaped slider; 4. Anti-adhesion device; 41. Fan; 42. L-shaped tube; 43. Fixed ring; 44. Triangular guide arc plate; 5. Focusing device; 51. Fixed frame; 52. Pinhole plate; 53. Sleeve plate; 54. Ring groove plate; 6. Auxiliary clamping device; 61. Clamping plate; 62. Spring plate; 63. Swing plate. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] See also Figure 1-6The present invention provides a technical solution: an angle detection device for installing a filter for an optical device, comprising a device body 1, a laser lamp body 2 fixedly mounted on the top of the device body 1, an angle adjustment device 3 provided inside the device body 1, and the angle adjustment device 3 comprising a U-shaped frame 31, the U-shaped frame 31 being fixed to the left side of the inner wall of the device body 1, a swivel 35 passing through the front and back sides of the inner wall of the U-shaped frame 31 and being rotatably mounted, a bump rod 34 passing through and slidably mounted on the opposite side of the two swivels 35, an arc-shaped through-slot plate 32 being fixed on the side of the bump rod 34 away from the inner wall of the U-shaped frame 31, a spring being provided between the arc-shaped through-slot plate 32 and the inner wall of the U-shaped frame 31, an end of the bump rod 34 away from the arc-shaped through-slot plate 32 slidingly passing through the inner and outer sides of the U-shaped plate 33, the middle part of the U-shaped plate 33 being convex, and a spring being provided between the convex part of the U-shaped plate 33 and the top surface of the U-shaped frame 31, the inner wall of the U-shaped frame 31 being hinged on the right side. The receiving plate 36 is connected, and a torsion spring is provided between the receiving plate 36 and the inner wall of the U-shaped frame 31. The U-shaped plate 33 drives the swivel 35 and the arc-shaped slot plate 32 to rotate through the protruding block rod 34. The U-shaped plate 33 drives the receiving plate 36 to rotate synchronously, and the arc-shaped slot plate 32 drives the angle of the tube body to change, thereby changing the angle at which the laser light main body 2 is projected on the filter of the tube body, thereby facilitating the measurement of the filter offset angle at multiple angles. Slide grooves are provided on both sides of the receiving plate 36, and a threaded rod 37 is installed on the top right side of the U-shaped frame 31 through the rotation of the frame plate. An L-shaped slider 38 is connected to the outside of the threaded rod 37, and the end of the L-shaped slider 38 away from the threaded rod 37 is slidably connected to the inside of the slide groove of the receiving plate 36. At the same time, the threaded rod 37 drives the L-shaped slider 38 to push the angle of the receiving plate 36 to change, so that the receiving plate 36 can be adaptively adjusted according to the different installation angles of the filter in the tube body.

[0024] Preferably, an anti-adhesion device 4 is provided at the bottom left side of the U-shaped frame 31, and the anti-adhesion device 4 includes a fan 41 and a triangular guide arc plate 44. The fan 41 is fixed to the bottom left side of the U-shaped frame 31, and a filter is provided at the air inlet of the fan 41. An L-shaped tube 42 is fixed at the air outlet of the fan 41. One end of the L-shaped tube 42 away from the fan 41 is fixedly connected to the bottom of the fixing ring 43. The fixing ring 43 is embedded in the inside of the U-shaped frame 31, and the fixing ring 43 is sleeved on the outside of the rotating ring 35. There are two triangular guide arc plates 44, and the two triangular guide arc plates 44 are respectively fixed on the inner walls of the opposite sides of the two arc-shaped slot plates 32. The L-shaped tube 42 and the fixing ring 43 are fixed. The interior of the fixed ring 43 is penetrated, and the bottoms of the protruding rod 34 and the rotating ring 35 are provided with through holes that penetrate the interior of the fixed ring 43. The inner wall of the arc-shaped slot plate 32 on the side close to the protruding rod 34 is provided with a through hole, and the through hole is opposite to the middle of the triangular guide arc plate 44. The fan 41 blows air into the interior of the fixed ring 43 through the L-shaped tube 42. Under the guiding action of the triangular inclined surfaces of the rotating ring 35, the protruding rod 34 and the triangular guide arc plate 44, the airflow will adhere to the arc-shaped slot plate 32 and be blown off, thereby avoiding the problem of impurities adhering to the arc-shaped slot plate 32, which causes the arc-shaped slot plate 32 to deviate from the clamping position of the tube body, thereby improving the accuracy of the angle measurement of the filter.

[0025] Preferably, the top and bottom of the arc-shaped through-slot plate 32 are both provided with auxiliary clamping devices 6, and the auxiliary clamping devices 6 include clamping plates 61. There are two clamping plates 61, and the two clamping plates 61 are slidably mounted on the top and bottom of the arc-shaped through-slot plate 32, respectively. Spring plates 62 are provided between the opposite sides of the two clamping plates 61 and the top and bottom of the arc-shaped through-slot plate 32, respectively. The end of the clamping plate 61 away from the protrusion rod 34 is serrated. Under the elastic force of the spring plate 62, the spring plate 62 pushes the clamping plate 61 to further clamp the tube body, thereby improving the stability of the angle measurement of the filter, and at the same time, the serrated part of the clamping plate 61 increases In order to increase the friction force of clamping the tube body, a through hole is opened in the middle of the spring plate 62, and a swing plate 63 is fixed to the inner wall of the side of the spring plate 62 away from the clamping plate 61. Through holes are opened at the top and bottom of the arc-shaped slot plate 32, and the swing plate 63 is opposite to the through hole of the arc-shaped slot plate 32. At the same time, the clamping plate 61 resists the spring plate 62 and deforms, and the clamping plate 61 drives the swing plate 63 to tilt up, so that the swing plate 63 guides the airflow generated by the fan 41 to the upper and lower positions of the tube body, thereby avoiding the problem of dust or impurities falling on the filter when measuring the filter in the tube body, thereby reducing dust adhesion and improving the performance of the filter.

[0026] Preferably, a focusing device 5 is provided on the top of the inner wall of the device body 1. The focusing device 5 includes a fixing frame 51. The fixing frame 51 is fixed to the top of the focusing device 5. Two pinhole plates 52 are fixed on the inner wall of the fixing frame 51 from top to bottom. The two pinhole plates 52 are both located directly below the laser light body 2. At the same time, the pinholes of the pinhole plates 52 will limit the laser emitted by the laser light body 2, thereby ensuring that the laser of the laser light body 2 propagates in a straight line to the center of the filter, thereby avoiding the problem of displacement of the lamp head of the laser light body 2 after long-term use, thereby further improving the focusing effect. To ensure the accuracy of the angle measurement of the filter, a scale plate is provided on the outer wall of the lower pinhole plate 52, and two sleeve plates 53 are slidably installed on the outer side of the lower pinhole plate 52. The end of the sleeve plate 53 away from the pinhole plate 52 is rotatably connected to the outer wall of the annular groove plate 54, and the annular groove plate 54 is fixed to the side of the arc-shaped through-groove plate 32 close to the protrusion rod 34. At the same time, the arc-shaped through-groove plate 32 drives the sleeve plate 53 to move along the outer wall of the pinhole plate 52 below through the annular groove plate 54. By observing the positions of the scale plates corresponding to the two sleeve plates 53 on the pinhole plate 52 below, it is determined whether the tube body is directly below the laser lamp main body 2, thereby reducing the measurement error.

[0027] When in use, the tube body with the filter installed is placed between the two arc-shaped slot plates 32. Under the spring force corresponding to the arc-shaped slot plates 32, the arc-shaped slot plates 32 clamp and fix the tube body. The laser lamp body 2 is started. When the filter is installed in the tube body at a 45-degree angle, the laser of the laser lamp body 2 is reflected on the filter of the tube body. The reflected laser irradiates the receiving plate 36 to form a light spot. By observing the position of the light spot, it can be determined whether there is an offset angle of the filter. At the same time, the U-shaped plate 33 is swung upward or downward. The U-shaped plate 33 drives the rotating ring 35 and the arc-shaped slot plate 32 to rotate through the protruding rod 34. The U-shaped plate 33 drives the receiving plate 36 to rotate synchronously, and the arc-shaped through-slot plate 32 drives the angle of the tube body to change, so that the angle at which the laser of the laser lamp main body 2 is projected on the filter of the tube body changes, thereby facilitating the measurement of the filter offset angle from multiple angles; at the same time, the threaded rod 37 is rotated, and the threaded rod 37 drives the L-shaped slider 38 to move along the top of the U-shaped frame 31, and the L-shaped slider 38 slides inside the slide groove of the receiving plate 36, and the L-shaped slider 38 drives the angle of the receiving plate 36 to change, so that the receiving plate 36 can be adaptively adjusted according to the different installation angles of the filter in the tube body.

[0028] At the same time, before the arc-shaped slot plate 32 clamps the tube body, the fan 41 is started, and the fan 41 blows air into the inside of the fixed ring 43 through the L-shaped tube 42. Under the guidance of the rotating ring 35 and the protruding block rod 34, the wind flows to the triangular guide arc plate 44. Under the guidance of the triangular inclined surface of the triangular guide arc plate 44, the wind flows obliquely above and below the arc-shaped slot plate 32, so that the airflow will adhere to the arc-shaped slot plate 32 and be blown off, thereby avoiding impurities adhering to the arc-shaped slot plate 32, resulting in the problem of deviation in the clamping position of the arc-shaped slot plate 32 on the tube body, thereby improving the accuracy of the angle measurement of the filter.

[0029] At the same time, when the arc-shaped slot plate 32 clamps the tube body, under the elastic force of the spring plate 62, the spring plate 62 pushes the clamping plate 61 to further clamp the tube body, thereby improving the stability of the angle measurement of the filter. At the same time, the serrated part of the clamping plate 61 increases the friction force of clamping the tube body. At the same time, when the clamping plate 61 clamps the arc-shaped slot plate 32, the clamping plate 61 resists the spring plate 62 and deforms. The clamping plate 61 drives the swing plate 63 to tilt up, so that the swing plate 63 guides the airflow generated by the fan 41 to the upper and lower positions of the tube body, thereby avoiding the problem of dust or impurities falling on the filter when measuring the filter in the tube body, thereby reducing dust adhesion and improving the performance of the filter.

[0030] At the same time, when the laser lamp main body 2 is in use, the laser of the laser lamp main body 2 will pass through the pinholes of the two pinhole plates 52, thereby ensuring that the laser of the laser lamp main body 2 propagates in a straight line to the exact center position of the filter. If it is not at the exact center position, this indicates that the position of the laser lamp main body 2 needs to be adjusted, thereby avoiding the problem of displacement of the lamp head of the laser lamp main body 2 after long-term use of the laser lamp main body 2, thereby further improving the accuracy of the angle measurement of the filter; at the same time, when the arc-shaped through-groove plate 32 clamps the tube body, the arc-shaped through-groove plate 32 drives the sleeve plate 53 to move along the outer wall of the pinhole plate 52 below through the annular groove plate 54, and by observing the positions of the scale plates corresponding to the two sleeve plates 53 on the pinhole plate 52 below, it is determined whether the tube body is directly below the laser lamp main body 2, thereby reducing the measurement error.

[0031] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A filter installation angle detection device for an optical device, comprising a device body (1), a laser light body (2) fixedly mounted on the top of the device body (1), characterized in that: An angle adjustment device (3) is provided inside the device body (1), and the angle adjustment device (3) comprises a U-shaped frame (31), the U-shaped frame (31) being fixed to the left side of the inner wall of the device body (1), a rotating ring (35) being passed through the front and back sides of the inner wall of the U-shaped frame (31) and being rotatably mounted, a bump rod (34) being passed through and slidably mounted on the opposite side of the two rotating rings (35), and an arc-shaped through-slot plate (32) being fixed on the side of the bump rod (34) away from the inner wall of the U-shaped frame (31) A spring is provided between the arc-shaped through-slot plate (32) and the inner wall of the U-shaped frame (31); one end of the protruding block rod (34) away from the arc-shaped through-slot plate (32) slides through the inner and outer sides of the U-shaped plate (33); the middle portion of the U-shaped plate (33) is convex, and a spring is provided between the convex portion of the U-shaped plate (33) and the top surface of the U-shaped frame (31); a receiving plate (36) is hinged on the right side of the inner wall of the U-shaped frame (31); a torsion spring is provided between the receiving plate (36) and the inner wall of the U-shaped frame (31); Slide grooves are provided on both sides of the receiving plate (36); a threaded rod (37) is rotatably mounted on the right side of the top of the U-shaped frame (31) through the frame plate; an L-shaped slider (38) is connected to the outside of the threaded rod (37); and an end of the L-shaped slider (38) away from the threaded rod (37) is slidably connected to the inside of the slide groove of the receiving plate (36); An anti-adhesion device (4) is provided at the bottom left side of the U-shaped frame (31), and the anti-adhesion device (4) includes a fan (41) and a triangular guide arc plate (44). The fan (41) is fixed to the bottom left side of the U-shaped frame (31), and a filter is provided at the air inlet of the fan (41). An L-shaped tube (42) is fixed at the air outlet of the fan (41), and one end of the L-shaped tube (42) away from the fan (41) is fixedly connected to the bottom of a fixing ring (43). The fixing ring (43) is embedded in the U-shaped frame (31), and the fixing ring (43) is sleeved on the outside of the rotating ring (35). There are two triangular guide arc plates (44), and the two triangular guide arc plates (44) are respectively fixed to the inner walls of the two arc-shaped through-slot plates (32) on the opposite side.

2. The device for detecting an angle of a filter for an optical device according to claim 1, wherein: The L-shaped tube (42) is connected to the interior of the fixed ring (43), and the bottoms of the protruding rod (34) and the rotating ring (35) are provided with through holes that are connected to the interior of the fixed ring (43). The inner wall of the arc-shaped through-slot plate (32) close to the protruding rod (34) is provided with a through opening, and the through opening is opposite to the middle of the triangular guide arc plate (44).

3. The optical device filter installation angle detection device according to claim 1, characterized in that: Auxiliary clamping devices (6) are provided at the top and bottom of the arc-shaped through-slot plate (32), and the auxiliary clamping devices (6) include clamping plates (61). There are two clamping plates (61), and the two clamping plates (61) are slidably mounted on the top and bottom of the arc-shaped through-slot plate (32), respectively. Spring plates (62) are provided between the opposite sides of the two clamping plates (61) and the top and bottom of the arc-shaped through-slot plate (32), respectively. The end of the clamping plate (61) away from the protrusion rod (34) is serrated.

4. The device for detecting an angle of a filter for an optical device according to claim 3, wherein: A through opening is provided in the middle of the spring plate (62), and a swing plate (63) is fixed to the inner wall of the spring plate (62) on the side away from the clamping plate (61). Through openings are provided at the top and bottom of the arc-shaped through-slot plate (32), and the swing plate (63) faces the through opening of the arc-shaped through-slot plate (32).

5. The device for detecting an angle of a filter for an optical device according to claim 1, wherein: A focusing device (5) is provided on the top of the inner wall of the device body (1), and the focusing device (5) comprises a fixing frame (51), the fixing frame (51) being fixed to the top of the focusing device (5), and two pinhole plates (52) being fixed to the inner wall of the fixing frame (51) in sequence from top to bottom, and both of the two pinhole plates (52) are located directly below the laser light body (2).

6. The device for detecting the installation angle of a filter for an optical device according to claim 5, wherein: The outer wall of the pinhole plate (52) is provided with a scale plate. Two sleeve plates (53) are slidably mounted on the outer side of the pinhole plate (52). One end of the sleeve plate (53) away from the pinhole plate (52) is rotatably connected to the outer wall of the annular groove plate (54). The annular groove plate (54) is fixed to a side of the arc-shaped through-groove plate (32) close to the bump rod (34).

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