Optical part rotation detection device

Abstract

The invention discloses an optical part rotation detection device, which comprises a base, a light shield is arranged on the base, a detection camera is arranged on the light shield, two first mounting plates are fixedly connected to the base, a transmission shaft is rotatably connected between the two first mounting plates, a square rod is arranged at one end of the transmission shaft, and the square rod is fixedly connected to the base. A worm is fixedly connected to the transmission shaft, and two second mounting plates are fixedly connected to the base. After the incident light is irradiated to the surface of the optical part by the parallel light source, the detection camera is used for detecting whether scattered light exists or not so as to detect whether surface defects exist on the surface of the optical part, the surface defects of an optical part body can be conveniently and comprehensively detected, operation is easy, and use is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of optical component detection, and in particular to an optical component rotation detection device. Background Art

[0002] With the rapid development of modern industry, precision optical components are widely used in various industrial fields. As a carrier for realizing optical functions, optical components play a vital role in the development and use of various optical instruments. In order to avoid the presence of surface defects in optical parts that affect the normal use of optical system functions, it is usually necessary to perform surface defect detection on optical parts, especially for convex optical parts. The existing optical parts surface defect detection is generally achieved with the help of optical parts rotating detection devices.

[0003] When using the existing optical parts rotation detection device, the optical parts are usually fixed to the clamping fixture, and then the optical parts are rotated, and the staff observes the optical parts with the naked eye to see if there are surface defects. This detection method has the disadvantages of inaccurate visual recognition and low detection efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art, such as: when the existing optical part rotation detection device is used, the optical part is usually fixed to a clamping fixture, and then the optical part is rotated, and the staff observes with the naked eye whether there are surface defects on the optical part. This detection method has the disadvantages of inaccurate naked eye recognition and low detection efficiency.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A rotation detection device for optical parts comprises a base, a light shield is provided on the base, a detection camera is provided on the light shield, two first mounting plates are fixedly connected to the base, a transmission shaft is rotatably connected between the two first mounting plates, a square rod is provided on one end of the transmission shaft, a worm is fixedly connected to the transmission shaft, two second mounting plates are fixedly connected to the base, a worm wheel is rotatably connected between the two second mounting plates, the worm wheel is meshingly connected with the worm, a first driving motor is fixedly connected to the worm wheel, a supporting shaft is fixedly connected to the output end of the first driving motor, a mounting frame is fixedly connected to the end of the supporting shaft away from the first driving motor, a clamping device is provided on the mounting frame, a roller is fixedly connected to the support shaft, a speed change transmission device is provided on the square rod, and a lifting device is provided on the base.

[0007] Preferably, the sunshade is provided with a plurality of limiting tubes, each of which is provided with a slide groove, and the base is fixedly connected with a plurality of sliding rods, and the sliding rods are slidably connected in the slide grooves.

[0008] Preferably, a shading curtain is provided on the outer side wall of the shading hood, and the shading curtain is arranged around the outer side wall of the shading hood.

[0009] Preferably, the clamping device includes an adjusting rod, which is rotatably connected to the mounting frame. The adjusting rod passes through the mounting frame and is respectively fixedly connected with a baffle and a knob at both ends. Two adjusting plates are symmetrically arranged on the adjusting rod, and both adjusting plates are fixedly connected with a clamping plate, and a clamping groove is arranged in the clamping plate.

[0010] Preferably, the adjusting rod is provided with two sections of threads with opposite rotation directions, the adjusting plate is provided with a thread groove, and the adjusting rod is threadably connected to the thread groove on the adjusting plate.

[0011] Preferably, the speed change transmission device includes a right-angle connection piece, which is slidably connected to the base, and the right-angle connection piece is provided with two mounting grooves, in which the first adapter and the second adapter are rotatably connected respectively, the first adapter piece is slidably connected to the square rod, a first bevel gear is fixedly connected to a side wall of the first adapter piece close to the worm, a second bevel gear is fixedly connected to a side wall of the second adapter piece close to the square rod, the first bevel gear and the second bevel gear are meshingly connected, a fixing rod is fixedly connected to the second adapter piece, a transmission ball is fixedly connected to the fixing rod, the roller contacts the outer side wall of the transmission ball, a spring is sleeved on the square rod, and the spring is located between the right-angle connection piece and a first mounting plate.

[0012] Preferably, the lifting device includes a second drive motor, the second drive motor is fixedly connected to the base, a threaded shaft is fixedly connected to the output end of the second drive motor, a threaded ring is fixedly connected to the inner side wall of the light shield, and the threaded shaft is threadedly connected in the threaded ring.

[0013] The beneficial effects of the present invention are:

[0014] 1. Use a detection camera to detect whether there is scattered light to detect whether there are surface defects on the surface of the optical part. When the optical part body is subjected to surface defect detection, the first drive motor is started to drive the optical part body to rotate around the central axis of the support shaft. At the same time, the support shaft drives the worm gear to rotate around the shaft through the roller, thereby adjusting the inclination angle of the support shaft, and then adjusting the position of the parallel light source irradiated on the optical part body. In conjunction with the rotation of the optical part body around the central axis of the support shaft, the irradiation position of the parallel light source on the optical part body is continuously adjusted from the inside to the outside, thereby enabling the present invention to conveniently perform a more comprehensive detection of the surface defects of the optical part body, and the operation is simple and easy to use.

[0015] 2. In the present invention, the speed-changing transmission device utilizes the change in the contact position between the roller and the transmission ball when the support shaft is tilted and deflected, so that the transmission ratio between the roller and the transmission ball changes, and as the deflection angle of the roller increases, the contact position between the roller and the transmission ball is closer to the upper side of the transmission ball, thereby reducing the transmission ratio between the roller and the transmission ball, thereby compensating for the reduction in the speed of the transmission shaft caused by the reduction in the speed of the first drive motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of an optical component rotation detection device proposed by the present invention;

[0017] Figure 2 A schematic structural diagram of a detection state of an optical component rotation detection device proposed by the present invention;

[0018] Figure 3 It is a left view of the detection state of an optical component rotation detection device proposed by the present invention;

[0019] Figure 4 for Figure 3 AA section view in;

[0020] Figure 5 for Figure 4 A magnified view of the structure in middle B;

[0021] Figure 6 It is a partial structural schematic diagram of the detection state of an optical component rotation detection device proposed by the present invention;

[0022] Figure 7 A schematic diagram of the structure of a clamping plate of an optical component rotation detection device proposed by the present invention;

[0023] Figure 8 An optical path diagram of an optical component rotation detection device proposed by the present invention in which the optical component has no surface defects;

[0024] Fig. 9 A light path diagram of a surface defect of an optical part of an optical part rotation detection device proposed by the present invention;

[0025] Fig.10 This is a light path diagram of an optical component detection device after angle adjustment for detecting an optical component rotation proposed by the present invention.

[0026] In the figure: 1 base, 2 light shield, 3 detection camera, 4 limit tube, 5 slide bar, 6 light shielding curtain, 7 first mounting plate, 8 transmission shaft, 9 square rod, 10 worm, 11 second mounting plate, 12 worm gear, 13 first drive motor, 14 support shaft, 15 mounting frame, 16 adjustment rod, 17 baffle, 18 knob, 19 adjustment plate, 20 clamping plate, 21 clamping groove, 22 roller, 23 right-angle connector, 24 first adapter, 25 second adapter, 26 first bevel gear, 27 second bevel gear, 28 fixing rod, 29 transmission ball, 30 spring, 31 second drive motor, 32 threaded shaft, 33 threaded ring, 34 optical component body, 35 parallel light source. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0028] Reference Figure 1-10 A rotation detection device for optical parts includes a base 1, a light shield 2 is provided on the base 1, a detection camera 3 is provided on the light shield 2, a plurality of limit tubes 4 are provided on the light shield 2, and slide grooves are provided in the plurality of limit tubes 4. A plurality of slide rods 5 are fixedly connected to the base 1, and the slide rods 5 are slidably connected in the slide grooves. A light shielding curtain 6 is provided on the outer wall of the light shield 2, and the light shielding curtain 6 is arranged around the outer wall of the light shield 2.

[0029] Two first mounting plates 7 are fixedly connected to the base 1, a transmission shaft 8 is rotatably connected between the two first mounting plates 7, a square rod 9 is provided on one end of the transmission shaft 8, a worm 10 is fixedly connected to the transmission shaft 8, two second mounting plates 11 are fixedly connected to the base 1, a worm gear 12 is rotatably connected between the two second mounting plates 11, the worm gear 12 is rotatably connected between the two second mounting plates 11 through a rotating shaft, the worm gear 12 is meshed with the worm 10, a first driving motor 13 is fixedly connected to the worm gear 12, a support shaft 14 is fixedly connected to the output end of the first driving motor 13, a mounting frame 15 is fixedly connected to the end of the support shaft 14 away from the first driving motor 13, and a clamping device is provided on the mounting frame 15.

[0030] The clamping device includes an adjusting rod 16, which is rotatably connected to the mounting frame 15. The adjusting rod 16 passes through the mounting frame 15 and is fixedly connected to baffles 17 and knobs 18 at both ends thereof. Two adjusting plates 19 are symmetrically arranged on the adjusting rod 16, and both adjusting plates 19 are fixedly connected to clamp plates 20, and clamping grooves 21 are arranged in the clamp plates 20. The adjusting rod 16 is provided with two sections of threads with opposite rotation directions, and the adjusting plate 19 is provided with a thread groove. The adjusting rod 16 is threadedly connected to the thread groove on the adjusting plate 19, and a rotating roller 22 is fixedly connected to the support shaft 14.

[0031] A speed change transmission device is provided on the square rod 9, and the speed change transmission device includes a right-angle connector 23, which is slidably connected to the base 1. The right-angle connector 23 is provided with two mounting grooves, in which a first adapter 24 and a second adapter 25 are rotatably connected respectively. The first adapter 24 is slidably connected to the square rod 9, and a first bevel gear 26 is fixedly connected to a side wall of the first adapter 24 close to the worm 10, and a second bevel gear 27 is fixedly connected to a side wall of the second adapter 25 close to the square rod 9. The first bevel gear 26 and the second bevel gear 27 are meshingly connected, and a fixed rod 28 is fixedly connected to the second adapter 25, and a transmission ball 29 is fixedly connected to the fixed rod 28, and the roller 22 contacts the outer side wall of the transmission ball 29.

[0032] A spring 30 is sleeved on the square rod 9, and the spring 30 is located between the right-angle connector 23 and a first mounting plate 7. A lifting device is provided on the base 1, and the lifting device includes a second drive motor 31, and the second drive motor 31 is fixedly connected to the base 1. A threaded shaft 32 is fixedly connected to the output end of the second drive motor 31, and a threaded ring 33 is fixedly connected to the inner side wall of the light shield 2, and the threaded shaft 32 is threadedly connected in the threaded ring 33.

[0033] When the present invention is used, the parallel light source 35 is pre-installed at a suitable position in the light shield 2 at a suitable angle, and then the knob 18 is turned to drive the adjustment rod 16 to rotate, and the adjustment plate 19 is driven to move by the threaded connection between the adjustment rod 16 and the thread groove on the adjustment plate 19. Since the adjustment rod 16 is provided with two sections of threads with opposite rotation directions, and the two adjustment plates 19 are respectively threadedly connected to the two sections of threads, when the adjustment rod 16 rotates, the two adjustment plates 19 can be driven to move closer to each other or farther away from each other;

[0034] When installing the optical component body 34, first turn the knob 18 forward to drive the two adjustment plates 19 away from each other, then install the optical component body 34 between the two clamping plates 20, the side of the optical component body 34 is clamped in the clamping groove 21, the clamping groove 21 matches the setting of the optical component body 34, then turn the knob 18 backward to drive the two adjustment plates 19 closer to each other, and then drive the two clamping plates 20 closer to each other until the optical component body 34 is clamped between the two clamping plates 20. Since the clamping groove 21 matches the optical component body 34, the optical component body 34 will be clamped and fixed between the two clamping plates 20, so that the central axis of the optical component body 34 is aligned with the support shaft 14;

[0035] After the optical component body 34 is installed, the second drive motor 31 can be started. The output end of the second drive motor 31 drives the threaded shaft 32 to rotate, and the threaded connection between the threaded shaft 32 and the threaded ring 33 is used to drive the light shield 2 to move downward. Since the specifications and dimensions of the optical component body 34 and the installation position and angle of the parallel light source 35 are known, it is necessary to control the second drive motor 31 to drive the light shield 2 to move downward to an appropriate height until the incident position of the parallel light source 35 is located at the center of the optical component body 34. The detection camera 3 on the light shield 2 is set directly facing the optical component body 34, and the light shielding curtain 6 is hung down to block the gap between the base 1 and the light shield 2, so as to provide a dark environment for the detection of optical components in the light shield 2;

[0036] By turning on the parallel light source 35 and the detection camera 3, the surface defect detection of the optical component body 34 can be carried out. For the specific working principle, refer to Figure 8 and Fig. 9 The optical path diagram is first Figure 8 When the incident light from the parallel light source 35 irradiates the optical component body 34, if there is no surface defect at the irradiation position, the light is reflected on the smooth surface of the optical component body 34, and the reflected light is also parallel light, and no light enters the detection camera 3. Fig. 9 When the incident light emitted by the parallel light source 35 irradiates the optical component body 34, if there is a surface defect at the irradiation position, the light is scattered at the defect of the optical component body 34, and the scattered light enters the detection camera 3, so that the surface defect of the optical component body 34 can be detected;

[0037] When the optical component body 34 is subjected to surface defect detection, the first drive motor 13 is started, and the output end of the first drive motor 13 drives the mounting frame 15, the adjusting rod 16, the adjusting plate 19, the clamping plate 20 and the optical component body 34 installed between the two clamping plates 20 to rotate around the central axis of the support shaft 14 through the support shaft 14. At the same time, the support shaft 14 drives the roller 22 to rotate, and the roller 22 drives the transmission ball 29, the fixing rod 28, the second adapter 25 and the second bevel gear 27 to rotate by means of friction. The second bevel gear 27 drives the first bevel gear 26, the first adapter 24 and the square rod 9 to rotate around the central axis of the transmission shaft 8 by means of the meshing connection relationship between the second bevel gear 27 and the first bevel gear 26, and then drives the worm gear 12 to rotate around the rotating shaft by means of the meshing connection relationship between the worm 10 and the worm wheel 12, thereby adjusting the inclination angle of the support shaft 14, and then adjusting the position of the parallel light source 35 irradiating the optical component body 34;

[0038] In conjunction with the rotation of the optical component body 34 around the central axis of the support shaft 14, the irradiation position of the parallel light source 35 on the optical component body 34 is continuously adjusted from the inside to the outside. For the convex optical component body 34, since its convex surface is an incomplete spherical surface, the spherical surfaces of the optical component bodies 34 of the same specifications and models are also consistent. Therefore, it is only necessary to make the center position of the convex surface consistent with the axis position of the rotating shaft on the worm gear 12, so that after the angle of the optical component body 34 is adjusted, the angle of the incident light irradiated by the parallel light source 35 on the optical component body 34 and the contact surface remains unchanged, such as Fig.10 As shown, the present invention can conveniently perform a more comprehensive inspection of the surface defects of the optical component body 34, and the operation is simple and easy to use;

[0039] When performing surface defect detection on the outer side of the optical component body 34 away from the center, if the first drive motor 13 rotates at a uniform speed throughout the entire process, then as the angle deflection becomes larger and larger, the linear speed of the optical component body 34 receiving light also becomes faster and faster, which is not convenient for the detection of the detection camera 3. Therefore, the first drive motor 13 needs to rotate at a variable speed, and the speed decreases, that is, the speed of the first drive motor 13 is decreasing to compensate for the change in the linear speed of the optical component body 34 receiving light to keep it unchanged. In this case, in order to balance the speed change of the worm gear 12 during the subsequent angle adjustment process, a variable speed transmission device is provided;

[0040] In the speed transmission device, the roller 22 and the transmission ball 29 are connected by friction, that is, the roller 22 can drive the transmission ball 29 to rotate around the fixed rod 28 by friction. In the subsequent transmission, it is also necessary to overcome the friction resistance of the right-angle connector 23 sliding on the base 1 and provide the power for the worm 10 and the worm wheel 12 to drive. Because the adjustment speed of the inclination angle of the support shaft 14 does not need to be very fast, on this basis, the support shaft 14, the mounting frame 15 and the adjustment plate 19 can be made of aluminum alloy to reduce the load of the worm 10 on the worm wheel 12. At the same time, anti-slip stripes are provided on the outer wall of the roller 22 to increase the surface roughness. The transmission ball 29 is made of rubber material, and the elastic force of the spring 30 is used to increase the friction between the roller 22 and the transmission ball 29 (the friction is the driving force for driving the transmission ball 29 to rotate), ensuring that it is sufficient to drive the worm wheel 12 to rotate. Moreover, after the load is reduced, the demand for the driving force is also reduced, thereby significantly reducing the stress on the fixed rod 28.

[0041] The speed transmission device utilizes that when the support shaft 14 is tilted and deflected, the contact position between the roller 22 and the transmission ball 29 changes, so that the transmission ratio between the roller 22 and the transmission ball 29 changes, and as the deflection angle of the roller 22 increases, the contact position between the roller 22 and the transmission ball 29 is closer to the upper side of the transmission ball 29, and the circumference of the contact part between the transmission ball 29 and the roller 22 is reduced, thereby reducing the transmission ratio between the roller 22 and the transmission ball 29, so that in the process of adjusting the detection position on the optical part body 34, the speed reduction of the transmission shaft 8 caused by the speed reduction of the first drive motor 13 is compensated.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An optical component rotation detection device, comprising a base (1), characterized in that: The base (1) is provided with a light shield (2), the light shield (2) is provided with a detection camera (3), the base (1) is fixedly connected with two first mounting plates (7), a transmission shaft (8) is rotatably connected between the two first mounting plates (7), a square rod (9) is provided on one end of the transmission shaft (8), a worm (10) is fixedly connected to the transmission shaft (8), the base (1) is fixedly connected with two second mounting plates (11), a worm gear (12) is rotatably connected between the two second mounting plates (11), the The worm wheel (12) is meshedly connected with the worm (10); a first drive motor (13) is fixedly connected to the worm wheel (12); a support shaft (14) is fixedly connected to the output end of the first drive motor (13); a mounting frame (15) is fixedly connected to the end of the support shaft (14) away from the first drive motor (13); a clamping device is provided on the mounting frame (15); a rotating roller (22) is fixedly connected to the support shaft (14); a speed change transmission device is provided on the square rod (9); and a lifting device is provided on the base (1).

2. The optical component rotation detection device according to claim 1, characterized in that: The light shield (2) is provided with a plurality of position limiting tubes (4), each of which has a slide groove inside. The base (1) is fixedly connected with a plurality of slide rods (5), and the slide rods (5) are slidably connected in the slide grooves.

3. The optical component rotation detection device according to claim 1, characterized in that: A light-shielding curtain (6) is provided on the outer side wall of the light-shielding hood (2), and the light-shielding curtain (6) is arranged around the outer side wall of the light-shielding hood (2).

4. The optical component rotation detection device according to claim 1, characterized in that: The clamping device comprises an adjusting rod (16), the adjusting rod (16) is rotatably connected to the mounting frame (15), the adjusting rod (16) passes through the mounting frame (15), and the two ends thereof are respectively fixedly connected with a baffle (17) and a knob (18), the adjusting rod (16) is symmetrically provided with two adjusting plates (19), the two adjusting plates (19) are both fixedly connected with a clamping plate (20), and the clamping plate (20) is provided with a clamping groove (21).

5. The optical component rotation detection device according to claim 4, characterized in that: The adjusting rod (16) is provided with two sections of threads with opposite rotation directions, the adjusting plate (19) is provided with a thread groove, and the adjusting rod (16) is threadedly connected with the thread groove on the adjusting plate (19).

6. The optical component rotation detection device according to claim 1, characterized in that: The speed change transmission device comprises a right-angle connecting member (23), the right-angle connecting member (23) is slidably connected to the base (1), the right-angle connecting member (23) is provided with two installation grooves, a first adapter member (24) and a second adapter member (25) are rotatably connected in the two installation grooves respectively, the first adapter member (24) is slidably connected to the square rod (9), a first bevel gear (26) is fixedly connected to a side wall of the first adapter member (24) close to the worm (10), and a first bevel gear (26) is fixedly connected to a side wall of the second adapter member (25) close to the square rod (9). A second bevel gear (27) is fixedly connected to one side wall of the square rod (9); the first bevel gear (26) and the second bevel gear (27) are meshingly connected; a fixing rod (28) is fixedly connected to the second adapter (25); a transmission ball (29) is fixedly connected to the fixing rod (28); the roller (22) contacts the outer side wall of the transmission ball (29); a spring (30) is sleeved on the square rod (9); and the spring (30) is located between the right-angle connector (23) and a first mounting plate (7).

7. The optical component rotation detection device according to claim 1, characterized in that: The lifting device comprises a second drive motor (31), the second drive motor (31) is fixedly connected to the base (1), a threaded shaft (32) is fixedly connected to the output end of the second drive motor (31), a threaded ring (33) is fixedly connected to the inner side wall of the light shield (2), and the threaded shaft (32) is threadedly connected in the threaded ring (33).

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