Auxiliary positioning device for manufacturing dynamic optical film

Abstract

The invention relates to an auxiliary positioning device for manufacturing a dynamic optical film, which is mainly used for improving the positioning precision, the loading and unloading efficiency, the shading protection and the forming quality of a dynamic structure of an optical film in a dynamic optical film preparation process. Comprising a photoetching machine, a feeding and discharging mechanism, a lifting shading mechanism, a positioning and clamping mechanism, a positioning mold, a rotating frame, a magnetic block, a servo motor, a lead screw, a linkage shaft, an eccentric wheel and other key components, precise positioning and clamping of an optical film are achieved by precisely controlling coordinated movement of all the components, and it is ensured that the optical film is fixed to a proper position under the action of magnetic force; the problems that in the prior art, positioning precision is insufficient, feeding and discharging are inconvenient, shading is incomplete, and dynamic structure adaptability is poor are further solved, the optical film yield and microstructure forming precision are improved, and the method is suitable for large-scale production and high-quality optical film preparation and has important application value in the optical field.

Description

Technical Field

[0001] The invention relates to the technical field of optical film preparation and processing, and in particular to an auxiliary positioning device for dynamic optical film production. Background Art

[0002] During the molding and exposure process of optical films, they need to be precisely positioned in the exposure room and undergo photolithography, exposure and other process treatments to form special micro-nano structures on the surface of the film to achieve light regulation. Since such optical films are often required to have features such as free-form surfaces or asymmetry, their processing is more susceptible to positional offset, vibration and stray light. Therefore, in the preparation and processing of dynamic optical films, how to accurately position and stably complete the exposure process while ensuring the integrity of the optical film surface has become a topic of general concern in the industry.

[0003] At present, for the positioning and exposure of dynamic optical films, a simple loading and unloading platform or a fixed fixture is usually used to clamp and position the film. However, the existing technology has the following shortcomings: 1. Insufficient positioning accuracy: Traditional fixtures often lack fine-tuning or multi-directional clamping mechanisms, and cannot stably fit some optical films with free-form surfaces or special shapes, resulting in displacement or warping during the exposure process.

[0004] 2. The operation is not convenient enough: For occasions where batch exposure needs to be achieved on the same equipment, simple fixtures or loading and unloading devices often have cumbersome steps and time-consuming alignment when removing and replacing optical films, which makes it difficult to meet the high-efficiency production requirements in the preparation of dynamic optical films.

[0005] 3. Light shielding and light leakage problems: After the existing equipment sends the optical film under the exposure head, it cannot effectively block the ambient light outside the exposure area, which easily causes light leakage, scattering and other phenomena, affecting the imaging quality of the microstructure on the surface of the optical film. Especially for processing occasions with high requirements for optical consistency, inadequate light shielding will significantly reduce the product yield and affect the overall processing accuracy.

[0006] 4. Unable to meet dynamic structural requirements: In order to form a microstructure pattern with dynamic effects on the optical film, it is necessary to achieve more flexible multi-angle or multi-position adjustment during the exposure process. Most existing positioning devices are limited to fixed alignment methods, which are difficult to automatically adjust to the appropriate position according to production requirements, resulting in poor processing adaptability.

[0007] In summary, the existing dynamic optical film preparation method needs to be further improved in terms of positioning accuracy, loading and unloading efficiency, and light shading protection. Summary of the invention

[0008] In view of the shortcomings of the prior art, the present invention provides an auxiliary positioning device for dynamic optical film production, which can automatically complete loading, positioning and shading actions before and after the optical film is exposed, and can maintain stable clamping of the optical film during the exposure process, thereby improving the yield of the optical film and the quality of microstructure imaging, and providing reliable technical guarantee for the large-scale production of dynamic optical films.

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: An auxiliary positioning device for dynamic optical film production includes a photolithography machine, an exposure chamber is provided at the front center of the photolithography machine, a material feeding and discharging mechanism is installed at the opening of the exposure chamber, and the material feeding and discharging mechanism is used to move the optical film to be processed; The surface of the feeding and discharging mechanism is horizontally slidably installed with a lifting shading mechanism, and the lifting shading mechanism includes a moving seat, and the four corners of the surface of the moving seat are vertically slidably installed with columns, and the tops of the four columns are provided with positioning clamping mechanisms; The positioning and clamping mechanism is used to clamp and fix the optical film to be processed, and the positioning and clamping mechanism includes a lifting platform, a lower positioning mold is arranged on the upper surface of the lifting platform, bosses are symmetrically arranged on the rear side of the upper surface of the lifting platform, a rotating shaft is rotatably installed between the two bosses, a rotating frame is arranged on one side of the rotating shaft, an upper positioning mold is installed on the inner side of the rotating frame, and the upper positioning mold and the lower positioning mold are used to clamp and fix the optical film.

[0010] Furthermore, an upper shading plate is provided above the front opening of the exposure chamber, an exposure head is provided above the interior of the exposure chamber, the lifting platform corresponds to the height of the upper shading plate, a first magnetic block is symmetrically inlaid on the front side of the upper surface of the lifting platform, a second magnetic block is symmetrically inlaid on the lower side of the side of the rotating frame away from the rotating shaft, the second magnetic block corresponds to the first magnetic block, an extension block is provided at one end of the rotating shaft, the extension block is placed on the outside of the boss, a fixing bolt is vertically provided on the surface of the extension block, and the fixing bolt is distributed at 90° to the rotating frame.

[0011] Furthermore, a positioning groove is provided on the surface of one of the bosses, and the positioning groove corresponds to the angle of the rotating frame in the open state. A limiting plate is provided on the top of the fixing bolt, and a movable block is slidably installed on the surface of the fixing bolt. An extrusion bolt is laterally fixed on one side of the movable block, and the extrusion bolt is adapted to the inside of the positioning groove. A second spring is sleeved on the surface of the fixing bolt, and the second spring is placed between the limiting plate and the movable block.

[0012] Furthermore, the material feeding and discharging mechanism includes a base plate fixed on the upper surface of the lithography machine, a first side plate is vertically arranged on the front side of the base plate, and a second side plate is vertically arranged on the rear side of the base plate, a servo motor is fixed on the outer side of the first side plate, a lead screw is arranged at the output end of the servo motor, and the lead screw is rotatably placed between the first side plate and the second side plate.

[0013] Furthermore, the movable seat is screwed on the surface of the screw, and the upper surface of the base plate is symmetrically provided with track grooves. The bottom of the movable seat slides inside the track grooves. Four mounting holes are evenly provided on the upper surface of the movable seat. A sealing plug is screwed on the top opening of the mounting hole, and the columns slide vertically through the sealing plugs respectively.

[0014] Furthermore, a lifting plate is provided at the bottom of the column, and the lifting plate slides inside the mounting hole. A spring is sleeved on the surface of the column, and the spring is placed between the sealing plug and the lifting plate.

[0015] Furthermore, a linkage shaft is provided inside the movable seat for transverse rotation, and eccentric wheels are symmetrically arranged at both ends of the linkage shaft. The two eccentric wheels are respectively placed on both sides of the outside of the movable seat, and extended extrusion plates are symmetrically arranged on both sides of the lifting platform. The bottom of the extended extrusion plate is arranged as an arc surface, and the eccentric wheel is in contact with the lower surface of the extended extrusion plate.

[0016] Furthermore, a slide groove is provided on the rear side of the movable seat, and the slide groove is placed below the linkage shaft, and the two are distributed perpendicularly to each other. A gear is installed at the center of the surface of the linkage shaft, and an extruded gear rod slides through the inside of the slide groove, and the extruded gear rod is meshed with the gear, and the end of the extruded gear rod corresponds to the second side plate.

[0017] The present invention provides an auxiliary positioning device for dynamic optical film production, which has the following beneficial effects: This device achieves higher precision and stability in the transmission and positioning process of the optical film. The servo motor and the lead screw drive the moving seat to reciprocate smoothly. Combined with the column sliding and spring-assisted design of the lifting and shading mechanism, the movement and clamping of the optical film before and after the exposure chamber are always smooth, which can effectively solve the problem of insufficient positioning accuracy mentioned in the background technology. The optical film is fixed by the mutual adsorption of magnetic blocks between the lower positioning mold and the upper positioning mold, which can quickly complete the stable clamping of the optical film and avoid displacement due to loose clamps during exposure.

[0018] This device is more convenient and efficient in loading and unloading optical films. The movable seat is guided by the track groove, and the meshing design of the linkage shaft and the extrusion gear rod can quickly switch the positioning clamping mechanism between the flipping or clamping state, reduce the clamping steps and improve the production cycle, thereby overcoming the inconvenient operation defects in the background technology. The rotating frame can automatically open when needed, and the stable angle during flipping is guaranteed by the cooperation of the movable block and the positioning groove, which is convenient for batch replacement of optical films.

[0019] The device significantly reduces the adverse effects of light leakage and scattering by arranging an upper shading plate above the exposure chamber opening and using a lifting shading mechanism to shield the area outside the exposure area when the optical film is exposed. The cooperation of the eccentric wheel and the extended extrusion plate can provide an automatic upward shading action after the optical film moves under the exposure head, so that the optical film is protected from stray light interference during exposure, meeting the higher requirements for shading and light control in the background technology.

[0020] Aiming at the special molding requirements of dynamic optical films, this device adopts a multi-point linkage structure and a servo drive system, which can quickly complete precise positioning and clamping at different heights and angles, so as to adapt to the exposure processing of free-form surfaces or asymmetric surfaces such as irregular water droplet microstructures, and smoothly cope with the dynamic structure requirements proposed in the background technology. The upper and lower positioning molds correspond to the target shape of the optical film respectively, and provide stable support and alignment during the processing process, which helps to form high-quality micro-nano optical patterns on the optical film and ensure the consistency of mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural diagram of the installation of the present invention; Figure 2 It is a schematic diagram of the distribution structure of the exposure chamber and the upper shading plate of the present invention; Figure 3 It is a schematic diagram of the material input and output structure of the present invention; Figure 4 For the present invention Figure 3 A schematic cross-sectional structure diagram of ; Figure 5 It is a schematic diagram of the three-dimensional structure of the lifting shading mechanism of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the mounting hole of the present invention; Figure 7 This is a schematic diagram of the eccentric wheel and lifting platform structure of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the positioning and clamping mechanism of the present invention.

[0022] in, 1. Photolithography machine; 11. Exposure chamber; 12. Upper shading plate; 2. feeding and discharging mechanism; 21. bottom plate; 22. first side plate; 23. servo motor; 24. second side plate; 25. track groove; 26. lead screw; 3. Lifting shading mechanism; 31. Moving seat; 32. Mounting hole; 33. Slide groove; 34. Sealing plug; 35. Lifting plate; 36. Column; 37. Spring; 38. Linkage shaft; 39. Gear; 310. Eccentric wheel; 311. Extrusion gear rod; 4. Positioning and clamping mechanism; 41. Lifting platform; 42. First magnetic block; 43. Lower positioning mold; 44. Boss; 441. Positioning groove; 45. Rotating shaft; 46. Rotating frame; 47. Upper positioning mold; 48. Second magnetic block; 49. Extension block; 410. Extension extrusion plate; 411. Fixing bolt; 412. Limiting plate; 413. Movable block; 414. Second spring; 415. Extrusion bolt. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Embodiment 1: See also Figure 1-8 An auxiliary positioning device for dynamic optical film production includes a photolithography machine 1, an exposure chamber 11 is opened at the front center of the photolithography machine 1, and a feeding and discharging mechanism 2 is installed at the open end of the exposure chamber 11, and the feeding and discharging mechanism 2 is used to move the optical film to be processed; the photolithography machine 1 adopts a multifunctional optical processing equipment with a model of GY-LK02 and uses a 6mm thick alloy steel plate as a body material to withstand high-intensity continuous workload and ensure the stability of dynamic optical film processing; the inner wall of the exposure chamber 11 is sprayed with an anti-reflective nano-coating to suppress stray light and improve light utilization; the feeding and discharging mechanism 2 is connected to the photolithography machine 1 through a precision guide rail to achieve a smooth transmission of the optical film to be processed and effectively shorten the loading and unloading time.

[0025] 2 is horizontally slidably installed with a lifting shading mechanism 3, which includes a moving seat 31. The four corners of the surface of the moving seat 31 are vertically slidably installed with columns 36, and the tops of the four columns 36 are provided with positioning clamping mechanisms 4; the lifting shading mechanism 3 adopts a high-precision linear slide model MGN12 for horizontal movement to achieve position fine-tuning and ensure positioning accuracy during the preparation of the dynamic optical film; the moving seat 31 adopts an aluminum alloy material model 6061 to reduce the overall mass and improve the flexibility of the device; the columns 36 are made of chrome-plated steel and are surface polished to reduce friction and ensure smooth movement; the positioning clamping mechanism 4 can be combined with the special shape of the optical film to stably clamp it when it is in the exposed position and prevent the optical film from shifting during exposure.

[0026] 4 is used to clamp and fix the optical film to be processed. The positioning clamping mechanism 4 includes a lifting platform 41. A lower positioning mold 43 is arranged on the upper surface of the lifting platform 41. A boss 44 is symmetrically arranged on the rear side of the upper surface of the lifting platform 41. A rotating shaft 45 is rotatably installed between the two bosses 44. A rotating frame 46 is arranged on one side of the rotating shaft 45. An upper positioning mold 47 is installed on the inner side of the rotating frame 46. The upper positioning mold 47 and the lower positioning mold 43 are used to clamp and fix the optical film; the positioning clamping mechanism 4 can be adjusted in height through the lifting platform 41 to adapt to optical films of different thicknesses and sizes; the lower positioning mold 43 and the upper positioning mold 47 are made of imported high-hardness alloy steel model SKD11 and are anti-slip treated on the surface to enhance the clamping effect; the boss 44 is made of hard aluminum material and an oxide film is sprayed on the surface to improve wear resistance; the rotating shaft 45 is made of 45 steel and is heat-treated to improve fatigue life; the rotating frame 46 is turned upward through the rotating shaft 45 when the optical film is placed and taken out to reduce contact interference and provide a stable pressing force during the positioning process.

[0027] See also Figure 1 , Figure 2 , Figure 7 and Figure 8An upper shading plate 12 is arranged above the front opening of the exposure chamber 11, an exposure head is arranged above the interior of the exposure chamber 11, a lifting platform 41 corresponds to the height of the upper shading plate 12, a first magnetic block 42 is symmetrically inlaid on the front side of the upper surface of the lifting platform 41, a second magnetic block 48 is symmetrically inlaid below the side of the rotating frame 46 away from the rotating shaft 45, and the second magnetic block 48 corresponds to the first magnetic block 42, an extension block 49 is arranged at one end of the rotating shaft 45, the extension block 49 is placed on the outside of the boss 44, a fixing bolt 411 is vertically arranged on the surface of the extension block 49, and the fixing bolt 411 is 90 degrees with the rotating frame 46. ° distribution; the upper shading plate 12 is made of a composite plate of model SC-UV05 and is covered with a protective paint on the surface to resist long-term exposure to high-energy light sources; the exposure head has a built-in high-precision optical lens group and an ultraviolet LED light source of model UV-365 to generate a fine microstructure on the surface of the optical film; the first magnetic block 42 and the second magnetic block 48 are made of high-temperature resistant rare earth permanent magnet material of brand N42UH and are embedded in the surface of the positioning clamping mechanism 4 to maintain a stable adsorption force; the extension block 49 adopts an integrated milling process to ensure the coaxiality with the rotating shaft 45 and maintain the precise movement of the rotating frame 46.

[0028] See also Figure 5-8 A positioning groove 441 is provided on the surface of one of the bosses 44, and the positioning groove 441 corresponds to the angle of the rotating frame 46 in the open state. A limiting plate 412 is provided on the top of the fixing bolt 411, and a movable block 413 is slidably installed on the surface of the fixing bolt 411. A squeezing bolt 415 is laterally fixed on one side of the movable block 413, and the squeezing bolt 415 is adapted to the inside of the positioning groove 441. A second spring 414 is sleeved on the surface of the fixing bolt 411, and the second spring 414 is placed between the limiting plate 412 and the movable block 413; the depth of the positioning groove 441 is 5mm and is The opening angle of the rotating frame 46 is precisely matched to provide sufficient turning space when the optical film is loaded; the fixing bolt 411 is made of high-carbon steel and has an anti-corrosion coating on the outer surface to increase the service life; the movable block 413 is made of plastic alloy model POM-C and has wear-resistant gaskets embedded in the contact position to reduce rotational friction; the outer surface of the extrusion bolt 415 is carburized and quenched with a hardness of HRC55 to ensure a stable deformation coefficient during multiple opening and closing; the second spring 414 is made of stainless spring steel material to provide lasting resilience to maintain the stability of the optical film clamping.

[0029] See also Figure 1-4The feeding and discharging mechanism 2 includes a bottom plate 21 fixed on the upper surface of the lithography machine 1, a first side plate 22 is vertically arranged on the front side of the bottom plate 21, and a second side plate 24 is vertically arranged on the rear side of the bottom plate 21, a servo motor 23 is fixed on the outer side of the first side plate 22, and a lead screw 26 is arranged at the output end of the servo motor 23, and the lead screw 26 is rotatably placed between the first side plate 22 and the second side plate 24; the bottom plate 21 adopts high-strength aluminum alloy material model 7075 and is hard anodized to improve wear resistance; the first side plate 22 and the second side plate 24 are both made of steel plates with a thickness of 8mm and are formed by CNC bending to ensure overall rigidity; the servo motor 23 uses an AC servo system model MHMD082G1U with a power of 750W and is connected to the lead screw 26 by a coupling to ensure smooth transmission; the pitch of the lead screw 26 is set to 5mm and is roll-formed to improve positioning accuracy and reduce mechanical friction.

[0030] See also Figure 3-7 The movable seat 31 is screwed on the surface of the lead screw 26, and the upper surface of the bottom plate 21 is symmetrically provided with a track groove 25. The bottom of the movable seat 31 slides on the inner side of the track groove 25. Four mounting holes 32 are evenly provided on the upper surface of the movable seat 31. A sealing plug 34 is screwed on the open top of the mounting hole 32, and the columns 36 slide vertically through the sealing plug 34 respectively; the movable seat 31 adopts an aluminum alloy plate with a thickness of 6 mm and is hard-oxidized on the surface to improve corrosion resistance; the track groove 25 is formed by precision milling and fits tightly with the bottom of the movable seat 31 to reduce shaking and ensure the positioning stability during optical film processing; the mounting hole 32 is a through hole with a diameter of 12 mm and is threadedly connected to the sealing plug 34 to achieve convenient disassembly; the sealing plug 34 is made of high-temperature resistant silicone material and has anti-slip texture on the outer surface to facilitate manual opening or replacement.

[0031] See also Figure 6-7 A lifting plate 35 is provided at the bottom of the column 36, and the lifting plate 35 slides inside the mounting hole 32. A spring 37 is sleeved on the surface of the column 36, and the spring 37 is placed between the sealing plug 34 and the lifting plate 35; the lifting plate 35 is made of aluminum alloy model 6063 and anodized on the surface to reduce wear; the column 36 and the lifting plate 35 are connected by a linear bearing to improve the smoothness of movement and reduce noise; the spring 37 is made of stainless steel model SUS304 and is selected according to the spring constant K=15N / mm to provide a constant return force for the positioning clamping mechanism 4.

[0032] See also Figure 5-8A linkage shaft 38 is provided inside the movable seat 31 for horizontal rotation, and eccentric wheels 310 are symmetrically arranged at both ends of the linkage shaft 38. The two eccentric wheels 310 are respectively placed on both sides of the outside of the movable seat 31, and extended extrusion plates 410 are symmetrically arranged on both sides of the lifting platform 41. The bottom of the extended extrusion plate 410 is set as an arc surface, and the eccentric wheel 310 is in contact with the lower surface of the extended extrusion plate 410; the linkage shaft 38 is made of nickel-chromium alloy steel with a material model of SNCM439 and is tempered to enhance fatigue resistance; the eccentric wheel 310 is formed by precision CNC turning and the outer surface is rust-proof and passivated to ensure the service life when used in a high-humidity environment; the extended extrusion plate 410 is made of a stainless steel plate with a thickness of 4 mm and is polished at the arc surface to reduce the friction resistance between the eccentric wheel 310; the rotation of the eccentric wheel 310 drives the lifting platform 41 to move up and down accurately, thereby realizing the automatic clamping and release of the optical film.

[0033] See also Figure 4-8 A slide groove 33 is provided on the rear side of the movable seat 31. The slide groove 33 is placed below the linkage shaft 38, and the two are perpendicular to each other. A gear 39 is installed at the center of the surface of the linkage shaft 38. An extrusion gear rod 311 slides through the slide groove 33. The extrusion gear rod 311 meshes with the gear 39, and the end of the extrusion gear rod 311 corresponds to the second side plate 24; the gear 39 adopts a tooth profile standard with a module of 1.25 and obtains excellent meshing degree through a high-precision grinding process to reduce motion errors; the extrusion gear rod 311 is made of carburized steel and is subjected to surface high-frequency quenching to make the hardness reach HRC58; the inner wall of the slide groove 33 is covered with a wear-resistant self-lubricating film to reduce the friction during the movement of the gear rod and improve the positioning stability; when the end of the extrusion gear rod 311 contacts the second side plate 24, it can trigger the synchronous rotation of the linkage shaft 38 and drive the lifting and shading mechanism 3 to be linked as a whole to meet the batch exposure requirements in the preparation process of dynamic optical films.

[0034] Embodiment 2: 1. Implementation plan and working principle This embodiment is mainly optimized for the coordination of the servo motor 23, the lead screw 26 and the moving seat 31 to obtain higher precision and stability in the transmission and positioning process of the optical film. The servo motor 23 uses an AC servo system with a power of 750W (model: MHMD082G1U), the lead screw 26 uses a high-precision roll-formed lead screw with a pitch of 5mm, and the moving seat 31 uses 6061 aluminum alloy and is hard-oxidized. Through the above configuration, when the equipment is running, the rotational motion of the output end of the servo motor 23 is converted into the linear motion of the moving seat 31 through the lead screw 26, and stable translation is maintained during the optical film feeding and discharging stage and the exposure positioning stage. In conjunction with the up and down movement of the column 36, the spring 37 and the lifting plate 35, the positioning clamping mechanism 4 can still have a high-precision clamping effect at different heights, significantly reducing the offset of the optical film.

[0035] 2. Experimental Control and Data In order to verify the improvement effect of this embodiment in positioning accuracy, a comparative test was conducted with a conventional control device using an ordinary stepping motor and a trapezoidal lead screw. The actual positioning error (unit: μm) of the moving seat 31 along the direction of the lead screw 26 was measured at different movement speeds (50 mm / s, 70 mm / s, 90 mm / s, 110 mm / s, 130 mm / s), and the following data table was obtained:

[0036] The above data show that the present embodiment controls the overall positioning error within 13 μm, which is much better than the 22-48 μm error range produced by the traditional solution.

[0037] 3. Related formulas For the quantification of positioning accuracy, the relative positioning error δ can be defined as follows:

[0038] in, is the actual measured position, is the command position. By controlling δ within a small range (usually less than 1%), the demand for high-precision positioning of the optical film during the exposure stage can be met.

[0039] Embodiment 3: 1. Implementation plan and working principle This embodiment improves the rapid flipping and clamping release mechanism composed of the rotating frame 46, the rotating shaft 45 and the extrusion gear rod 311 to achieve rapid loading and unloading and efficient replacement of optical films. The rotating frame 46 made of high-strength aluminum alloy (model: 7075) is installed in a bearing-type manner with the rotating shaft 45, and a positioning groove 441 is set on the boss 44 to cooperate with the movable block 413, which can be locked when flipping the opening to avoid repeated operations. The extrusion gear rod 311 is meshed with the gear 39. When the moving seat 31 moves backward and contacts the second side plate 24, the rotating frame 46 can be synchronously triggered to open or close, thereby simplifying the manual operation process and improving production efficiency.

[0040] 2. Experimental Control and Data In order to test the loading and unloading efficiency of the device, the average time for each replacement of the optical film (including film removal, film placement and clamping) was measured and compared with the traditional manual clamping solution. Five typical tests were selected (each group replaced 20 optical films, recorded the total completion time and calculated the average value), and the results are as follows:

[0041] As can be seen from the table, the average time for replacing the traditional manual fixture is about 15.5 s / piece, while the present embodiment only takes about 9.9 s / piece, and the overall efficiency is improved by more than 36%.

[0042] The relevant formula can define the feeding efficiency E per unit time as follows:

[0043] Among them, N represents the number of optical films loaded in the measurement cycle, and T is the actual time (minutes). This formula can be used to estimate the processing output per hour and verify the improvement of production efficiency by the automatic loading and unloading mechanism.

[0044] Embodiment 4: 1. Implementation plan and working principle In this embodiment, an upper shading plate 12 is arranged above the opening of the exposure chamber 11, and the outside of the exposure area is covered by the automatic lifting action of the lifting shading mechanism 3, effectively preventing stray light outside the exposure area from affecting the optical film. The upper shading plate 12 is made of a composite plate (model: SC-UV05), and a protective paint is sprayed on the surface to resist high-energy ultraviolet light, and a sufficient movement gap is left at the position corresponding to the position of the lifting platform 41, so that the optical film can cooperate with the upper shading plate 12 to form a closed environment when moving under the exposure head, reducing outdoor light interference.

[0045] When the movable seat 31 moves to the rear end and drives the extrusion gear rod 311 to drive the linkage shaft 38 to rotate, the eccentric wheel 310 will push the extension extrusion plate 410 upward, so that the positioning clamping mechanism 4 as a whole is close to the upper shading plate 12, thereby forming a shading area around the exposure head.

[0046] 2. Experimental Control and Data By subjecting the same batch of optical films to UV exposure, the surface defect rate (microstructure collapse or blur) and stray light intensity of the finished product under different shading conditions were tested. The following table gives 5 sets of data under different usage conditions:

[0047] The results show that after adopting the automatic lifting shading design of this embodiment, the stray light illumination is significantly reduced, the finished product defect rate is greatly reduced, and the imaging quality of the dynamic optical film is effectively improved.

[0048] 3. Related formulas When quantitatively analyzing the shading effect, the shading rate η can be used for evaluation:

[0049] in, is the external ambient light intensity, It is the illumination inside the exposure area. The higher the shading rate, the stronger the ability to block stray light.

[0050] Embodiment 5: 1. Implementation plan and working principle This embodiment focuses on optical films with complex patterns such as free-form surfaces, asymmetric structures, and water droplet microstructures, and achieves precise matching at different heights and angles through a multi-point linkage positioning and clamping mechanism 4. The upper positioning mold 47 and the lower positioning mold 43 are customized according to the shape of the eyeglass lens and incorporate a certain surface curvature. The embedded first magnetic block 42 and the second magnetic block 48 provide stable adhesion, which can ensure that the optical film is tightly attached to the surface of the positioning mold at each local position when the lithography machine 1 exposes the optical film.

[0051] The lifting mechanism driven by the eccentric wheel 310 cooperates with the servo motor 23 to realize automatic adjustment during continuous multiple exposures. According to the elastic deformation characteristics of different film materials (such as polycarbonate PC, polyester PET, etc.), the clamping mechanism can maintain a uniform fit with the surface of the film material, thereby reducing stress concentration during microstructure exposure.

[0052] 2. Experimental Control and Data For dynamic optical films of different shapes (free-form surface lenses, optical films with sharp water droplet microstructures, asymmetric lens sheets, etc.), the structural distortion rate after exposure molding was measured, which is defined as the percentage deviation between the actual key dimension of the molding pattern and the design value. The following table lists 5 sets of test data:

[0053] It can be seen that under a variety of complex configurations, the structural distortion rate can be controlled within 1%, meeting the requirements for high-precision optical film preparation.

[0054] 3. Related formulas In order to more intuitively evaluate the forming accuracy of the optical film structure, the structural distortion rate ε can be defined as follows:

[0055] Among them, Dmeasured represents the measured critical dimension of the finished product, and Ddesign is the designed dimension. By controlling ε at an extremely low level, this device can achieve high-fidelity exposure processing of complex microstructures under the special molding requirements of dynamic optical films.

[0056] Working principle: When in use, the servo motor 23 is used to control the rotation of the lead screw 26, and then the lifting and shading mechanism 3 is controlled to move as a whole. When loading, the lifting and shading mechanism 3 is moved to the front end. At this time, due to the existence of the spring 37, the lifting plate 35 is always subjected to a downward force, and then the positioning and clamping mechanism 4 is placed at the bottom. At this time, the upper shading plate 12 will not hinder the movement of the positioning and clamping mechanism 4. When the lifting and shading mechanism 3 moves to the front end, the rotating frame 46 is lifted to separate the upper positioning mold 47 from the lower positioning mold 43. At the same time, due to the existence of the second spring 414, the movable block 413 is always subjected to a force in the direction of the axis of the rotating shaft 45, so that the extrusion bolt 415 and the top arc surface of the boss 44 are always in contact and have a certain force. When the rotating frame 46 is opened to the maximum angle, the extrusion bolt 415 can enter the interior of the positioning groove 441 to keep the rotating frame 46 open, thereby facilitating the loading and unloading of the optical film. After cutting the optical film to a certain size, lay it flat on the upper surface of the lower positioning mold 43, and then press the end of the rotating frame 46 hard to make the rotating shaft 45 rotate. At this time, the extrusion bolt 415 and the positioning groove 441 are separated due to the mutual shear force, and the rotating frame 46 presses down and fixes the optical film horizontally, and keeps it fixed by the mutual adsorption of the second magnetic block 48 and the first magnetic block 42, so as to realize auxiliary positioning of the optical film. The second magnetic block 48 and the first magnetic block 42 are consistent with the shape of the eyeglass lens, providing accurate positioning for the lithography machine 1, and then start the servo motor 23 to control the lifting and shading mechanism 3 to move into the exposure chamber 11; When the lifting shading mechanism 3 moves to the rear end, the optical film is placed directly below the exposure head and moves to the rear side of the upper shading plate 12. At the same time, the protruding extrusion gear rod 311 is impacted by the second side plate 24 and moves toward the inside of the inner slide groove 33, so that the extrusion gear rod 311 is engaged with the gear 39 to drive the linkage shaft 38 to rotate. The rotation of the linkage shaft 38 can drive the eccentric wheels 310 at both ends to rotate, and then the eccentric wheels 310 simultaneously squeeze the extended extrusion plate 410 upward, so that the positioning and clamping mechanism 4 moves upward as a whole. After the upward movement, the positioning and clamping mechanism 4 is higher than the lower surface of the upper shading plate 12, so as to automatically block the upper part of the interior of the exposure chamber 11 to prevent light leakage from the exposure chamber 11 and affect the processing quality. After processing, the optical film is taken out and cut into shape. When the optical film is placed below the exposure head, an irregular water droplet microstructure pattern is formed on the optical film through the exposure head. The pattern has the characteristics of free curved surface, asymmetry, unevenness and microscopic disorder, so as to realize special regulation of light and generate dynamic optical signals.

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary positioning device for dynamic optical film production, comprising a photolithography machine (1), characterized in that: An exposure chamber (11) is provided at the front center of the photolithography machine (1), and a material inlet and outlet mechanism (2) is installed at the open portion of the exposure chamber (11), wherein the material inlet and outlet mechanism (2) is used to move the optical film to be processed; A lifting shading mechanism (3) is horizontally slidably mounted on the surface of the feeding and discharging mechanism (2), the lifting shading mechanism (3) comprising a movable seat (31), and vertically slidably mounted columns (36) are disposed at the four corners of the surface of the movable seat (31), and positioning clamping mechanisms (4) are disposed on the tops of the four columns (36); The positioning and clamping mechanism (4) is used to clamp and fix the optical film to be processed. The positioning and clamping mechanism (4) comprises a lifting platform (41). A lower positioning mold (43) is arranged on the upper surface of the lifting platform (41). Bosses (44) are symmetrically arranged on the rear side of the upper surface of the lifting platform (41). A rotating shaft (45) is rotatably installed between the two bosses (44). A rotating frame (46) is arranged on one side of the rotating shaft (45). An upper positioning mold (47) is installed on the inner side of the rotating frame (46). The upper positioning mold (47) and the lower positioning mold (43) are used to clamp and fix the optical film.

2. The auxiliary positioning device for dynamic optical film production according to claim 1, characterized in that: An upper shading plate (12) is arranged above the front opening of the exposure chamber (11); an exposure head is arranged above the interior of the exposure chamber (11); the lifting platform (41) corresponds in height to the upper shading plate (12); a first magnetic block (42) is symmetrically inlaid on the front side of the upper surface of the lifting platform (41); a second magnetic block (48) is symmetrically inlaid below the side of the rotating frame (46) away from the rotating shaft (45); the second magnetic block (48) corresponds to the first magnetic block (42); an extension block (49) is arranged at one end of the rotating shaft (45); the extension block (49) is placed outside the boss (44); a fixing bolt (411) is vertically arranged on the surface of the extension block (49); the fixing bolt (411) is distributed at 90 degrees with the rotating frame (46).

3. The auxiliary positioning device for dynamic optical film production according to claim 2, characterized in that: A positioning groove (441) is provided on the surface of one of the bosses (44), and the positioning groove (441) corresponds in angle to the rotating frame (46) in the open state. A limiting plate (412) is provided on the top of the fixing bolt (411), and a movable block (413) is slidably mounted on the surface of the fixing bolt (411). A pressing bolt (415) is transversely fixed on one side of the movable block (413), and the pressing bolt (415) is adapted to the inside of the positioning groove (441). A second spring (414) is sleeved on the surface of the fixing bolt (411), and the second spring (414) is placed between the limiting plate (412) and the movable block (413).

4. The auxiliary positioning device for dynamic optical film production according to claim 1, characterized in that: The material feeding and discharging mechanism (2) comprises a base plate (21) fixed on the upper surface of the photolithography machine (1), a first side plate (22) being vertically arranged on the front side of the base plate (21), and a second side plate (24) being vertically arranged on the rear side of the base plate (21), a servo motor (23) being fixed on the outer side of the first side plate (22), a lead screw (26) being arranged at the output end of the servo motor (23), and the lead screw (26) being rotatably arranged between the first side plate (22) and the second side plate (24).

5. The auxiliary positioning device for dynamic optical film production according to claim 4, characterized in that: The movable seat (31) is screwed on the surface of the lead screw (26); the upper surface of the base plate (21) is symmetrically provided with track grooves (25); the bottom of the movable seat (31) slides inside the track grooves (25); the upper surface of the movable seat (31) is evenly provided with four mounting holes (32); the top openings of the mounting holes (32) are screwed with sealing plugs (34); and the upright posts (36) respectively slide vertically through the sealing plugs (34).

6. The auxiliary positioning device for dynamic optical film production according to claim 4, characterized in that: A lifting plate (35) is provided at the bottom of the column (36), and the lifting plate (35) slides inside the mounting hole (32). A spring (37) is sleeved on the surface of the column (36), and the spring (37) is placed between the sealing plug (34) and the lifting plate (35).

7. The auxiliary positioning device for dynamic optical film production according to claim 6, characterized in that: A linkage shaft (38) is rotatably passed through the interior of the movable seat (31), and eccentric wheels (310) are symmetrically arranged at both ends of the linkage shaft (38). The two eccentric wheels (310) are respectively arranged on both sides of the exterior of the movable seat (31), and extended extrusion plates (410) are symmetrically arranged on both sides of the lifting platform (41), and the bottom of the extended extrusion plates (410) is arranged as an arc surface, and the eccentric wheels (310) are in contact with the lower surface of the extended extrusion plates (410).

8. The auxiliary positioning device for dynamic optical film production according to claim 7, characterized in that: A slide groove (33) is provided on the rear side of the movable seat (31). The slide groove (33) is placed below the linkage shaft (38) and the two are perpendicular to each other. A gear (39) is installed at the center of the surface of the linkage shaft (38). An extrusion gear rod (311) slides through the interior of the slide groove (33). The extrusion gear rod (311) and the gear (39) are meshed with each other. The end of the extrusion gear rod (311) corresponds to the second side plate (24).

Images