An optical thin film surface quality detection device

Abstract

An optical thin film surface quality detection device, belonging to the technical field of optical thin film detection, includes a thin film clamping and conveying mechanism, a detection mechanism, and a winding and unwinding mechanism. The winding and unwinding mechanism is arranged on the side of the thin film clamping and conveying mechanism away from the detection mechanism; the thin film clamping and conveying mechanism includes a clamping guide plate, a sliding body, a clamping control component, and a thin film clamping component. A clamping guide control groove is provided on the clamping guide plate, and the sliding body is clamped and slidably arranged in the clamping guide control groove. The clamping guide control groove guides and controls the moving path of the sliding body. The clamping control component includes a sliding rod, a switch control member, and a switch. Through the setting of the thin film clamping component, the optical thin film is clamped and fixed from both sides, and a lateral guiding force is applied to the continuously conveyed optical thin film to ensure the flatness during the detection of the optical thin film. At the same time, through the setting of the clamping guide control groove, the automatic control of the clamping state of the thin film clamping component is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical thin film detection, and specifically relates to an optical thin film surface quality detection device. Background Art

[0002] An optical thin film is composed of thin layered media and is a type of optical dielectric material that propagates light beams through interfaces. It is classified into types such as reflective films, anti-reflection films, polarization films, interference filters, etc. according to different functions. Before the optical thin film leaves the factory, surface defect detection is usually carried out to ensure the ex-factory quality. Common surface defect problems include stains, impurities, insects, and holes, etc.

[0003] To improve the detection efficiency of optical thin films, existing optical thin film surface quality detection devices usually adopt the setting of conveying rollers to achieve continuous conveyance of optical thin films, and realize continuous detection of optical thin films through the cooperation of a transmission light source and a camera. However, when the conveying roller conveys, it can only guide and feed the optical thin film in the conveying direction, and cannot apply a lateral guiding force to the optical thin film in the direction perpendicular to the optical thin film. Due to the lack of this guiding force, problems such as wrinkles are likely to occur during the conveyance of the optical thin film, thus affecting the detection result of the quality of the optical thin film. Summary of the Invention

[0004] In view of the above situation, to overcome the defects of the prior art, the present invention provides an optical thin film surface quality detection device to at least partially solve the problems raised in the above background art.

[0005] The present invention provides the following technical solution: An optical thin film surface quality detection device proposed by the present invention includes a film clamping and conveying mechanism, a detection mechanism, and a winding and unwinding mechanism. Two groups of film clamping and conveying mechanisms are symmetrically arranged on both sides of the detection mechanism. The two groups of film clamping and conveying mechanisms cooperate to clamp and apply force to convey the optical thin film from both sides of the detection mechanism. The winding and unwinding mechanism is arranged on the side of the film clamping and conveying mechanism away from the detection mechanism. The film clamping and conveying mechanism is used to convey the optical thin film and apply a lateral guiding force to the optical thin film. Through the setting of the film clamping and conveying mechanism, the optical thin film is transversely clamped during the continuous conveyance and detection process of the optical thin film, so that the optical thin film is conveyed to the detection mechanism in a laterally tensioned state, ensuring the surface quality detection result of the optical thin film, and realizing automatic unwinding and automatic winding of the optical thin film under the cooperative action of the winding and unwinding mechanism;

[0006] The film clamping and conveying mechanism includes a clamping guide plate, a sliding body, a clamping control component, and a film clamping component. The clamping guide plate is provided with a clamping guide control groove. The sliding body is engaged and slidably arranged in the clamping guide control groove. The clamping guide control groove guides and controls the moving path of the sliding body. The clamping control component includes a sliding rod, a switch control member, and a switch. The sliding rod is fixedly connected to the sliding body. The switch control member is fixedly arranged on the sliding rod. The sliding rod drives the switch control member to move relative to the switch and controls the opening and closing of the switch. The switch is electrically connected to the film clamping component. The film clamping component is fixedly installed on the sliding rod. The film clamping component is used to clamp the film and apply a lateral guiding force to the film. In the initial state, the switch is in the on state, and the film clamping component does not clamp the optical film. When the switch control member controls the switch to cut off the power, the film clamping component clamps the optical film and applies a guiding force to the optical film in the lateral direction to ensure that the optical film is conveyed and detected in a flattened state.

[0007] Further, in this solution: To cooperate with the clamping guide control groove to control the moving path and working state of the clamping control component, the optical film surface quality detection device further includes a driving shaft and a driving conveyor belt. The driving shaft is rotatably arranged on the clamping guide plate. Two groups of the driving shafts are symmetrically arranged at both ends of the clamping guide plate. The driving conveyor belt is sleeved on the two groups of driving shafts. A clamping driving block is fixedly arranged on the driving conveyor belt. The sliding rod is slidably arranged on the clamping driving block. While the clamping driving block moves with the driving conveyor belt, it drives the sliding rod to move with it. The switch is arranged on the clamping driving block, and the switch control member is correspondingly arranged with the switch.

[0008] Further, the clamping guide plate, the clamping control component, and the film clamping component are all symmetrically arranged at both ends of the driving shaft. A driving motor is fixedly arranged on one group of the clamping guide plates. The output shaft of the driving motor is fixedly connected to one group of the driving shafts. Under the action of the driving motor, it drives the driving conveyor belt to rotate. The sliding body is engaged and slidably arranged along the clamping guide control groove in multiple groups, and the multiple groups of the sliding bodies are evenly spaced. The clamping control component, the film clamping component, and the sliding body are arranged in one-to-one correspondence. The multiple groups of film clamping components located on one side of the optical film cooperate together to apply a lateral guiding force to the optical film and realize the continuous conveying and detection of the optical film.

[0009] Furthermore, in this solution: the clamping and guiding control groove includes a clamping section, a guiding section, and a conveying and moving section. The clamping section and the guiding section are formed on one side surface of the clamping and guiding plate. The guiding section is an inclined groove, and two groups of guiding sections are symmetrically arranged on both sides of the clamping section. The conveying and moving section is formed on the other side surface of the clamping and guiding plate and extends to both ends of the clamping and guiding plate to be connected to the guiding section. The conveying and moving section is arranged close to the outer side of the clamping and guiding plate, and the clamping section is arranged close to the inner side of the clamping and guiding plate. Through the lateral position difference between the conveying and moving section and the clamping section, the position adjustment of the switch control member relative to the switch can be achieved.

[0010] Furthermore, in this solution: the longitudinal section of the clamping and guiding control groove is an arc groove with an angle greater than 180° and less than 360°. The lower part of the sliding body is a sphere. Through the cooperation of the sphere and the arc groove, the stability of the sliding displacement of the clamping control assembly relative to the clamping and guiding control groove can be improved.

[0011] Furthermore, in this solution: an auxiliary spring is sleeved on the sliding rod, and both ends of the auxiliary spring are respectively connected to the clamping driving block and the switch control member.

[0012] Furthermore, in this solution: to convey the thin film in a laterally clamped state, the thin film clamping assembly includes a clamping frame and a clamping assembly. The clamping frame is fixedly connected to the sliding rod. Two groups of clamping assemblies are symmetrically arranged at both ends of the clamping frame. The two groups of clamping assemblies are respectively located on the front and back sides of the optical thin film, and the two groups of clamping assemblies cooperate to clamp the optical thin film.

[0013] Furthermore, in this solution: the clamping assembly includes a clamping column, a clamping spring, an electromagnet, and a clamping plate. The clamping column is slidably arranged on the clamping frame. The clamping plate is fixedly connected to one end of the clamping column. A limiting plate is fixedly arranged at the other end of the clamping column. The clamping spring is sleeved on the clamping column, and both ends of the clamping spring are respectively connected to the clamping frame and the clamping plate. The electromagnet is fixedly arranged on the clamping frame. The electromagnet is electrically connected to the switch. The switch controls the on-off of the electromagnet. The clamping plate is an iron plate.

[0014] Furthermore, in this solution: the electromagnet is selected as an annular electromagnet. The annular electromagnet is located outside the clamping column and the clamping spring. Through the structural setting of the annular electromagnet, the adsorption stability of the clamping plate can be improved.

[0015] Furthermore, in this solution: to improve the smoothness of the action when the thin film clamping assembly releases the clamping of the optical thin film, a roller is rotatably arranged on the clamping plate, and the axis of the roller is parallel to the conveying direction of the optical thin film.

[0016] Furthermore, in this solution: an installation plate is fixedly provided on the sliding rod, an electric telescopic rod is fixedly provided on the installation plate, and the film clamping assembly is fixedly arranged on the electric telescopic rod.

[0017] Furthermore, in this solution: the detection mechanism and the winding and unwinding mechanism can directly adopt the existing technology, and their specific structures will not be elaborated in detail in this solution.

[0018] Furthermore, in this solution: an electrostatic eliminator is fixedly arranged on the front side of the detection mechanism, and the electrostatic eliminator is used to remove static electricity and dust from the optical film to be detected.

[0019] The beneficial effects achieved by the present invention with the above structure are as follows: An optical film surface quality detection device proposed by the present invention specifically has the following advantages:

[0020] 1. In the technical solution of the present invention, through the setting of the film clamping assembly, clamping and fixing are carried out from both sides of the optical film, applying a lateral guiding force to the optical film, and cooperating with the rotation of the driving conveyor belt to drive the film clamping assembly to move synchronously with the conveying of the optical film, ensuring the clamping stability of the film clamping assembly to the optical film, so that the optical film always remains flat during the continuous conveying and detection process, avoiding wrinkles generated by the lack of lateral guiding force during the continuous conveying process of the optical film and affecting the detection result of the quality of the optical film;

[0021] 2. In the technical solution of the present invention, during the process of the driving conveyor belt driving the sliding rod to move synchronously with the optical film, through the setting of the clamping guiding control groove, the position of the automatic adjustment switch control member relative to the switch is automatically adjusted, thereby controlling the opening and closing of the switch, and finally controlling the clamping state of the film clamping assembly to the optical film, avoiding position interference between the film clamping assembly and the detection mechanism during continuous movement, and ensuring the continuity of the optical film conveying and detection and the lateral clamping force application to the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0023] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of the top structure of the film clamping and conveying mechanism of the embodiment of the present invention;

[0025] Figure 3 is a schematic diagram of the bottom structure of the film clamping and conveying mechanism of the embodiment of the present invention;

[0026] Figure 4 For Figure 3 partial enlargement of part A of

[0027] Figure 5 Schematic diagram of the connection structure between the clamping control component and the clamping guide plate according to an embodiment of the present invention;

[0028] Figure 6 Schematic cross-sectional structure diagram of the film clamping and conveying mechanism according to an embodiment of the present invention;

[0029] Figure 7 Schematic diagram of the structure of the clamping control component and the film clamping component according to an embodiment of the present invention;

[0030] Figure 8 Schematic diagram of the structure of the film clamping component according to an embodiment of the present invention;

[0031] Figure 9 Schematic cross-sectional structure diagram of the film clamping component according to an embodiment of the present invention.

[0032] Among them, 1. Film clamping and conveying mechanism, 2. Detection mechanism, 3. Rewinding and unwinding mechanism, 4. Clamping guide plate, 5. Sliding body, 6. Clamping guide control groove, 7. Slide bar, 8. Switch control member, 9. Switch, 10. Driving shaft, 11. Driving conveyor belt, 12. Clamping driving block, 13. Driving motor, 14. Clamping section, 15. Guiding section, 16. Conveying and moving section, 17. Auxiliary spring, 18. Clamping frame, 19. Clamping assembly, 20. Clamping column, 21. Clamping spring, 22. Electromagnet, 23. Clamping plate, 24. Limiting plate, 25. Roller, 26. Mounting plate, 27. Electric telescopic rod, 28. Static eliminator. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0035] This embodiment is a technical improvement made in response to the technical problem that in the process of continuously transporting and detecting a roll-shaped optical film by existing optical film surface quality detection equipment, due to the lack of lateral guiding force on the optical film, wrinkles are likely to occur during the transportation of the optical film, thus affecting the detection result of the quality of the optical film.

[0036] Refer to Figure 1 , in this embodiment, an optical film surface quality detection device provided in this embodiment includes a film clamping and conveying mechanism 1, a detection mechanism 2, and a winding and unwinding mechanism 3. Two groups of film clamping and conveying mechanisms 1 are symmetrically arranged on both sides of the detection mechanism 2. The two groups of film clamping and conveying mechanisms 1 cooperate to clamp and apply force to the optical film for conveying from both sides of the detection mechanism 2. The winding and unwinding mechanism 3 is arranged on the side of the film clamping and conveying mechanism 1 away from the detection mechanism 2. The film clamping and conveying mechanism 1 is used to convey the tubular optical film and apply a lateral guiding force to the optical film (the direction of the lateral guiding force can be referred to the direction indicated by the arrow in Figure 1 ). Through the setting of the film clamping and conveying mechanism 1, the optical film is transversely clamped during the continuous conveying and detection process of the optical film, so that the optical film is conveyed to the detection mechanism 2 in a laterally tensioned state, ensuring the surface quality detection result of the optical film, and realizing the automatic unwinding and automatic winding of the optical film under the cooperation of the winding and unwinding mechanism 3;

[0037] The detection mechanism 2 and the winding and unwinding mechanism 3 can directly adopt the existing technology, and their specific structures will not be elaborated in detail in this solution. For example, the detection mechanism 2 can use a camera in cooperation with a transmission light source to detect the surface quality of the optical film. A conveying roller group can be arranged on the winding and unwinding mechanism 3 for conveying the optical film.

[0038] Specifically, refer to Figure 2 and Figure 3 , in this embodiment, the film clamping and conveying mechanism 1 includes a clamping and guiding plate 4, a sliding body 5, a clamping control component, and a film clamping component. A clamping and guiding control groove 6 is formed on the clamping and guiding plate 4. The sliding body 5 is clamped and slidably arranged in the clamping and guiding control groove 6. The clamping and guiding control groove 6 guides and controls the moving path of the sliding body 5. The clamping control component includes a sliding rod 7, a switch control member 8, and a switch 9. The sliding rod 7 is fixedly connected to the sliding body 5. The switch control member 8 is fixedly arranged on the sliding rod 7. The sliding rod 7 drives the switch control member 8 to move relative to the switch 9 to control the opening and closing of the switch 9. The switch 9 is electrically connected to the film clamping component. The film clamping component is fixedly installed on the sliding rod 7. The film clamping component is used to clamp the film and apply a lateral guiding force to the film. In the initial state, the switch 9 is in the on state, and the film clamping component does not clamp the optical film. When the switch control member 8 controls the switch 9 to cut off the power, the film clamping component clamps the optical film and applies a guiding force to the optical film in the lateral direction, ensuring that the optical film is conveyed and detected in a flattened state.

[0039] During specific use, when the clamping control component slides along the clamping guiding control groove 6, the movement path and state of the clamping control component are guided and controlled by the clamping guiding control groove 6, so as to control the automatic clamping of the optical film by the film clamping component and the automatic release of the clamping: when the film clamping component clamps the optical film, the film clamping component applies a lateral guiding force to the optical film to ensure that the optical film is conveyed to the detection mechanism 2 in a flat state during continuous conveying and detection, and the surface quality detection is completed;

[0040] At the same time, when the film clamping component approaches the detection mechanism 2, the film clamping component is guided and controlled to automatically release the clamping of the optical film, so as to prevent the film clamping component from continuously moving along the conveying direction of the optical film and causing a position interference with the detection mechanism 2.

[0041] Specifically, referring to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 In this embodiment, the optical film surface quality detection device further includes a driving shaft 10 and a driving conveyor belt 11. The driving shaft 10 is rotatably arranged on the clamping guiding plate 4. Two groups of driving shafts 10 are symmetrically arranged at both ends of the clamping guiding plate 4. The driving conveyor belt 11 is sleeved on the two groups of driving shafts 10. A clamping driving block 12 is fixedly arranged on the driving conveyor belt 11. The sliding rod 7 is slidably arranged on the clamping driving block 12. While the clamping driving block 12 moves with the driving conveyor belt 11, it drives the sliding rod 7 to move with it. The switch 9 is arranged on the clamping driving block 12, and the switch control member 8 is correspondingly arranged with the switch 9.

[0042] During specific use, under the action of the driving conveyor belt 11, the clamping driving block 12 moves with the rotation of the driving conveyor belt 11. The clamping driving block 12 drives the sliding rod 7 to move synchronously. At the same time, under the guiding action of the clamping guiding control groove 6, the sliding body 5 is used to control the sliding rod 7 to drive the switch control member 8 to move in the vertical direction of the optical film conveying, so as to adjust the relative position between the switch control member 8 and the switch 9 and control the opening and closing of the switch 9.

[0043] Specifically, referring to Figure 2 and Figure 3, in this embodiment, the clamping guide plate 4, the clamping control component, and the film clamping component are symmetrically arranged at both ends of the driving shaft 10. A driving motor 13 is fixedly provided on a group of clamping guide plates 4. The output shaft of the driving motor 13 is fixedly connected to a group of driving shafts 10. Under the action of the driving motor 13, the driving conveyor belt 11 is driven to rotate. A plurality of sliding bodies 5 are engaged and slidably arranged along the clamping guide control groove 6, and the plurality of sliding bodies 5 are evenly spaced. The clamping control component, the film clamping component, and the sliding body 5 are arranged in one-to-one correspondence. A lateral guiding force is applied to the optical film through the cooperation of a plurality of film clamping components located on one side of the optical film, and continuous conveying and detection of the optical film are realized.

[0044] Specifically, referring to Figure 2 and Figure 5 , in this embodiment, the clamping guide control groove 6 includes a clamping section 14, a guiding section 15, and a conveying and moving section 16. The clamping section 14 and the guiding section 15 are opened on one side surface of the clamping guide plate 4. The guiding section 15 is an inclined groove, and two groups of guiding sections 15 are symmetrically arranged on both sides of the clamping section 14. The conveying and moving section 16 is opened on the other side surface of the clamping guide plate 4 and extends to both ends of the clamping guide plate 4 and is connected to the guiding section 15. The conveying and moving section 16 is arranged close to the outside of the clamping guide plate 4, and the clamping section 14 is arranged close to the inside of the clamping guide plate 4. Through the lateral position difference between the conveying and moving section 16 and the clamping section 14, the position adjustment of the switch control member 8 relative to the switch 9 can be realized.

[0045] During specific use, when the sliding body 5 slides along the clamping section 14, since the clamping section 14 is arranged close to the inside of the clamping guide plate 4, the sliding rod 7 will be driven to slide along the clamping driving block 12 towards the inside of the clamping guide plate 4. The sliding rod 7 drives the switch control member 8 to approach the switch 9, and the switch control member 8 controls the switch 9 to change from an on state to an off state, controls the film clamping component to clamp the optical film, and drives the optical film to be continuously conveyed to the detection device under the driving action of the driving conveyor belt 11, and ensures that the optical film is always conveyed in a flat state during the continuous conveying process, realizes the continuous detection of the surface quality of the optical film, and ensures the quality detection result.

[0046] Specifically, referring to Figure 6 , in this embodiment, the longitudinal section of the clamping guide control groove 6 is an arc groove greater than 180° and less than 360°. The lower part of the sliding body 5 is a sphere. Through the cooperation of the sphere and the arc groove, the stability of the sliding displacement of the clamping control component relative to the clamping guide control groove 6 can be improved.

[0047] Specifically, referring to Figure 7 , in this embodiment, an auxiliary spring 17 is sleeved on the sliding rod 7, and both ends of the auxiliary spring 17 are respectively connected to the clamping driving block 12 and the switch control member 8.

[0048] Specifically, referring to Figure 7 , in this embodiment, the film clamping assembly includes a clamping frame 18 and a clamping assembly 19. The clamping frame 18 is fixedly connected to the sliding rod 7. Two groups of clamping assemblies 19 are symmetrically arranged at both ends of the clamping frame 18. The two groups of clamping assemblies 19 are respectively located on the front and back sides of the optical film, and the two groups of clamping assemblies 19 cooperate to clamp the optical film.

[0049] Specifically, referring to Figure 8 and Figure 9 , in this embodiment, the clamping assembly 19 includes a clamping column 20, a clamping spring 21, an electromagnet 22 and a clamping plate 23. The clamping column 20 is slidably arranged on the clamping frame 18. The clamping plate 23 is fixedly connected to one end of the clamping column 20. A limiting plate 24 is fixedly arranged at the other end of the clamping column 20. The clamping spring 21 is sleeved on the clamping column 20, and both ends of the clamping spring 21 are respectively connected to the clamping frame 18 and the clamping plate 23. The electromagnet 22 is fixedly arranged on the clamping frame 18. The electromagnet 22 is electrically connected to the switch 9. The switch 9 controls the on-off of the electromagnet 22. The clamping plate 23 is an iron plate.

[0050] Specifically, in this embodiment, in the initial state, the electromagnet 22 is in the energized state. When the electromagnet 22 is energized, the clamping plate 23 is adsorbed by the electromagnet 22, and there is enough space between the two clamping plates 23 for the optical film to enter; when the switch control member 8 presses the switch 9, the switch 9 is turned off, the electromagnet 22 is de-energized, and at this time, under the action of the clamping spring 21, the clamping plates 23 of the two groups of clamping assemblies 19 are pushed to approach each other, and the two clamping plates 23 cooperate to clamp the optical film.

[0051] It should be noted that the electromagnet 22 and the iron clamping plate 23 provided in this embodiment are only a specific embodiment of this solution. For example, the electromagnet 22 and the clamping plate 23 are replaced with two electromagnets 22, and the adsorption or repulsion of the two electromagnets 22 is realized by controlling the polarities of the two electromagnets 22, so as to achieve the same technical effect as in this embodiment. The alternative solutions also belong to the protection scope of this solution.

[0052] Specifically, referring to Figure 9 , in this embodiment, the electromagnet 22 is selected as an annular electromagnet 22. The annular electromagnet 22 is located outside the clamping column 20 and the clamping spring 21. By setting the structure of the annular electromagnet 22, the adsorption stability of the clamping plate 23 can be improved.

[0053] Specifically, referring to Figure 8 and Figure 9 , in this embodiment, a roller 25 is rotatably arranged on the clamping plate 23, and the axis of the roller 25 is parallel to the conveying direction of the optical film.

[0054] During specific use, when the sliding body 5 slides from the clamping section 14 to the guiding section 15, at the moment when the electromagnet 22 resumes power supply, there will be a short delay in the adsorption of the electromagnet 22 on the clamping plate 23. At this time, when the sliding rod 7 pulls the film clamping assembly outward, a short stretching force will be applied to the optical film in the transverse direction. The setting of the roller 25 can avoid this transverse stretching force, thereby preventing accidental stretching of the optical film.

[0055] Specifically, referring to Figure 7 , in this embodiment, a mounting plate 26 is fixedly provided on the sliding rod 7, and an electric telescopic rod 27 is fixedly provided on the mounting plate 26. The film clamping assembly is fixedly arranged on the electric telescopic rod 27. The setting of the electric telescopic rod 27 can realize the adjustment of the position of the film clamping assembly, so as to meet the clamping and conveying detection requirements of optical films with different widths, and improve the applicability of the detection equipment provided by this solution.

[0056] Specifically, referring to Figure 1 , in this embodiment, an electrostatic eliminator rod 28 is fixedly arranged on the front side of the detection mechanism 2. The electrostatic eliminator rod 28 is used to remove static electricity and dust from the optical film to be detected.

[0057] The working principle of an optical film surface quality detection device provided by this embodiment is as follows:

[0058] 1. Place the reel-shaped optical film to be detected on a set of winding and unwinding mechanisms 3, and wind the detected optical film into a reel shape through another set of winding and unwinding mechanisms 3. The winding and unwinding mechanism 3 for placing the optical film to be detected is located on the side of the detection mechanism 2 where the electrostatic eliminator rod 28 is provided;

[0059] 2. Under the combined action of the two sets of winding and unwinding mechanisms 3, drive the optical film to achieve automatic unwinding and rewinding after detection. At the same time, under the action of the drive motor 13, drive the drive conveyor belt 11 to rotate. The drive conveyor belt 11 drives the sliding rod 7 to move along the direction of optical film conveyance through the clamping drive block 12. The sliding rod 7 drives the film clamping assembly to move synchronously, so as to cooperate with clamping and fixing the optical film during the continuous conveyance and detection process of the optical film. The film clamping assemblies located on both sides of the optical film cooperate to apply a transverse guiding force to the optical film from both sides of the optical film, ensuring that the optical film is conveyed to the detection mechanism 2 in a flat state for detection;

[0060] 3. During the process of step 2, the clamping state of the film clamping assembly on the optical film is controlled by the switch 9. Specifically:

[0061] When the sliding body 5 slides along the clamping section 14 of the clamping guide control groove 6, the slide bar 7 drives the switch control member 8 to approach and press the switch 9. The switch 9 changes from the normally open state to the closed state. After the switch 9 is closed, the electromagnet 22 is powered off. Under the action of the clamping spring 21, the rollers 25 of the two groups of clamping assemblies 19 approach and clamp the optical film from both the front and back sides of the optical film, thereby applying a lateral guiding force to the optical film to maintain the flatness of the optical film during the conveying process;

[0062] With the conveyance of the driving conveyor belt 11, the film clamping assembly is driven to gradually approach the detection mechanism 2. The sliding body 5 moves from the clamping section 14 along the guiding section 15 to the conveying moving section 16. At this time, the slide bar 7 drives the switch control member 8 to move away from the switch 9, and the switch 9 changes to the open state. The electromagnet 22 is powered on, and the electromagnet 22 adsorbs the clamping plate 23. The clamping plate 23 drives the roller 25 to move away from the optical film, releasing the clamping of the optical film. This group of film clamping assemblies continues to rotate along the conveying moving section 16 under the drive of the driving conveyor belt 11, waiting to move to the clamping position of the optical film again;

[0063] Through the combination of the above processes, the continuous clamping, conveying, and detection of the optical film can be realized. And during the above process, the distance between the two groups of film clamping assemblies corresponding horizontally can be adjusted by the telescopic movement of the electric telescopic rod 27, so as to adapt to optical films with different widths.

[0064] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, material or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, material or device.

[0065] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An optical thin film surface quality detection device, characterized in that: It includes a film clamping and conveying mechanism (1), a detection mechanism (2), and a winding and unwinding mechanism (3). The winding and unwinding mechanism (3) is arranged on the side of the film clamping and conveying mechanism (1) away from the detection mechanism (2). The film clamping and conveying mechanism (1) includes a clamping guide plate (4), a sliding body (5), a clamping control component, and a film clamping component. A clamping guide control groove (6) is formed on the clamping guide plate (4). A plurality of groups of the sliding body (5) are engaged and slidably arranged along the clamping guide control groove (6). The clamping guide control groove (6) guides and controls the movement path of the sliding body (5). A driving conveyor belt (11) is rotationally driven on the clamping guide plate (4), and a clamping driving block (12) is fixed on the driving conveyor belt (11). The clamping control component includes a sliding rod (7), a switch control member (8), and a switch (9). The sliding rod (7) is slidably arranged on the clamping driving block (12) and is fixedly connected to the sliding body (5). The switch control member (8) is fixedly arranged on the sliding rod (7). When the sliding rod (7) moves with the clamping driving block (12), it is guided by the clamping guide control groove (6) to drive the switch control member (8) to move relative to the switch (9) and control the opening and closing of the switch (9). The film clamping component includes a clamping frame (18) and a clamping assembly (19). Two groups of the clamping assembly (19) are symmetrically arranged at both ends of the clamping frame (18). The clamping assembly (19) includes an electromagnet (22) and a clamping plate (23). The clamping frame (18) is fixedly connected to the sliding rod (7). The electromagnet (22) is fixedly arranged on the clamping frame (18). The electromagnet (22) is electrically connected to the switch (9). The switch (9) controls the energization and de-energization of the electromagnet (22). The clamping plate (23) is slidably arranged in the clamping frame (18) under the control of the energization and de-energization of the electromagnet (22). The clamping plate (23) is an iron plate. A roller (25) is rotatably arranged on the clamping plate (23), and the axis of the roller (25) is parallel to the conveying direction of the optical film. An installation plate (26) is fixedly arranged on the sliding rod (7), and an electric telescopic rod (27) is fixedly arranged on the installation plate (26). The film clamping component is fixedly arranged on the electric telescopic rod (27).

2. The optical film surface quality detection device according to claim 1, wherein the clamping guide plate (4), the clamping control component, and the film clamping component are all symmetrically arranged at both ends of the driving shaft (10). A driving motor (13) is fixedly arranged on one group of the clamping guide plates (4), and the output shaft of the driving motor (13) is fixedly connected to one group of the driving shafts (10).

3. The optical thin film surface quality detection device according to claim 1, characterized in that: The clamping and guiding control groove (6) includes a clamping section (14), a guiding section (15) and a conveying and moving section (16). The clamping section (14) and the guiding section (15) are formed on one side surface of the clamping and guiding plate (4). Two groups of the guiding sections (15) are symmetrically arranged on both sides of the clamping section (14). The conveying and moving section (16) is formed on the other side surface of the clamping and guiding plate (4) and extends to both ends of the clamping and guiding plate (4) to be connected with the guiding section (15).

4. The optical thin film surface quality detection device according to claim 1, characterized in that: The longitudinal section of the clamping and guiding control groove (6) is an arc groove greater than 180° and less than 360°. The lower part of the sliding body (5) is a sphere.

5. The optical thin film surface quality detection device according to claim 1, characterized in that: An auxiliary spring (17) is sleeved on the sliding rod (7).

6. The optical thin film surface quality detection device according to claim 1, characterized in that: The clamping assembly (19) includes a clamping column (20) and a clamping spring (21). The clamping column (20) is slidably arranged on the clamping frame (18). One end of the clamping plate (23) is fixedly connected with the clamping column (20). The clamping spring (21) is sleeved on the clamping column (20), and both ends of the clamping spring (21) are respectively connected with the clamping frame (18) and the clamping plate (23).

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