Cylindrical surface film covering device for holographic waveguide grating soft film

Abstract

The utility model belongs to the technical field of holographic waveguide grating soft film production equipment, and particularly relates to a cylindrical surface film covering device of a holographic waveguide grating soft film, which comprises a compression roller, a horizontal sliding table and a curved surface substrate, the curved surface substrate is placed on the horizontal sliding table, and a mold for fixing the curved surface substrate is arranged on the horizontal sliding table. The horizontal sliding table moves to drive the curved-surface base plate to move horizontally, the pressing roller is arranged above the curved-surface base plate, downward pressure is provided for the curved-surface base plate in the process that the horizontal sliding table drives the curved-surface base plate to move horizontally, and limiting bearings capable of moving up and down are arranged at the two horizontal ends of the pressing roller. The uniform pressure of the compression roller on the curved-surface substrate is ensured by adjusting the height of the compression roller. In a word, the device has the advantages that the structure is simple, the operation is convenient, the pressure borne by the cylindrical-surface film is uniform, and the display effect of the produced soft film is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of holographic waveguide grating soft film production equipment, and in particular relates to a cylindrical coating device for a holographic waveguide grating soft film. Background Art

[0002] Grating waveguide is a new optical perspective augmented reality (AR) near-eye display technology that combines physical optics with geometric optics. This technology fabricates nano-grating structures on transparent optical lenses, uses the diffraction effect of nano-grating structures on light to achieve light beam deflection, and uses the optical waveguide principle of light beams in transparent optical lenses to achieve light beam conduction and expansion. This technology can comfortably present virtual information such as images and videos in front of the eyes, while making the optical system as light, thin, portable and transparent as ordinary glasses. With the continuous development of modern holographic waveguide technology, traditional waveguide lens prisms are increasingly being replaced by photosensitive polymer soft films plus PC optical substrates, especially in the fields of AR glasses.

[0003] Since the PC optical substrate of the holographic waveguide is mostly cylindrical and the material itself is prone to elastic deformation, and since there is no electrostatic adsorption between the film layer and the glass substrate, the coating effect is mainly formed by the slight viscosity and vacuum adsorption of the polymer photosensitive film layer. Therefore, a uniform and stable coating pressure is required in the process of pressing the film layer on the substrate. The existing coating equipment is very prone to uneven force during cylindrical coating, which causes bubbles, wrinkles, and local stress deformation in the soft film, affecting the display effect of the holographic waveguide and not meeting the use requirements of the holographic waveguide. Therefore, there is an urgent need for a cylindrical coating device for a holographic waveguide grating soft film, which can solve the technical problems of uneven force in the cylindrical coating process and avoid the deformation of the soft film caused by it in the prior art. Utility Model Content

[0004] In view of this, the utility model proposes a cylindrical coating device for holographic waveguide grating soft film, which is applied to the field of holographic waveguide grating soft film. It can solve the technical problems of uneven force in the cylindrical coating process of the prior art and avoid the deformation of the soft film caused by it, and has high application and promotion value.

[0005] In order to achieve the above technical purpose, the specific technical solution adopted by the utility model is:

[0006] A cylindrical coating device for a holographic waveguide grating soft film comprises a pressure roller, a horizontal slide and a curved substrate. The curved substrate is placed on the horizontal slide, a mold for fixing the curved substrate is arranged on the horizontal slide, so that the curved substrate is driven to move horizontally by the movement of the horizontal slide. The pressure roller is arranged above the curved substrate, and provides downward pressure to the curved substrate during the process of the horizontal slide driving the curved substrate to move horizontally. Limit bearings that can move up and down are arranged at both horizontal ends of the pressure roller, and the uniform pressure of the pressure roller on the curved substrate is ensured by adjusting the height of the pressure roller.

[0007] Furthermore, vertical slides supporting limit bearings are respectively provided at both horizontal ends of the pressure roller, each limit shaft is arranged inside the vertical slide on the same side, and vertically extending shaft guides are arranged inside the two vertical slides. The two shaft guides respectively pass through the middle part of the corresponding vertical slides and are slidably connected with the corresponding vertical slides, so that the vertical slides and the pressure roller move up and down synchronously.

[0008] Furthermore, a slow-weight spring and a base for supporting the vertical slide are arranged below the vertical slide. The slow-weight spring is arranged between the vertical slide and the base. The upper end of the slow-weight spring rests on the lower end of the vertical slide. The corresponding vertical slide can be supported by the elastic force of the slow-weight spring. Corresponding load blocks are arranged above the two vertical slides, and each load block and each slow-weight spring are mounted on the shaft guide rail on the same side.

[0009] Furthermore, the upper surface of the mold is bent upward, and the degree of curvature of the upper surface of the mold matches the bending degree of the curved substrate. The upper surface of the mold fits the lower part of the curved substrate to support the curved substrate. The lateral sides of the mold are fixedly connected to the horizontal slide.

[0010] Furthermore, the curved substrate adopts a waveguide optical substrate, and the curved substrate is connected to the mold by a positioning pin set through the mold. The upper curved surface of the curved substrate is 0.1 to 0.5 mm higher than the upper curved surface of the mold. The mold is provided with a line mark for positioning and a notch mark for grasping.

[0011] Furthermore, the pressure roller adopts a polyurethane sintered roller, the pressure roller core shaft is made of stainless steel, the polyurethane hardness is A90, the limit bearings are arranged on both sides of the axis of the pressure roller, and the horizontal ends of the pressure roller are provided with connecting shafts passing through the limit bearings on the same side.

[0012] Furthermore, the limit bearing includes a circular bearing and a U-shaped bearing, which are respectively located at the horizontal ends of the pressure roller. One end of the pressure roller horizontally passes through the inner ring of the bearing, and the other end of the pressure roller is a U-shaped shaft, and the U-shaped shaft of the pressure roller penetrates into the interior of the U-shaped bearing.

[0013] Furthermore, the U-shaped bearing includes an adapter plate, a U-shaped groove and a pressure cover. The pressure cover is arranged above the U-shaped shaft, and the pressure cover presses the upper end surface of the U-shaped shaft. The adapter plate and the U-shaped groove are arranged below the U-shaped shaft. The pressure cover presses the upper end surface of the U-shaped shaft and presses the U-shaped shaft into the U-shaped groove of the adapter plate. The pressure cover and the adapter plate are fastened by screws, and the connecting shaft and the pressure cover are fastened by pins.

[0014] Furthermore, a linear bearing sleeved on the shaft guide rail is arranged inside the vertical slide, and the vertical slide is through-fitted with the shaft guide rail through the linear bearing.

[0015] Furthermore, the horizontal slide adopts a square guide electric linear slide. A ball screw is arranged inside the horizontal slide for screw transmission. A guide rail is arranged inside the horizontal slide. The guide rail adopts a linear slider guide, which is connected to a corresponding limit switch and a zero position sensor. The electronic control system of the horizontal slide is controlled by a handheld stepper motor control box.

[0016] By adopting the above technical solution, the utility model can also bring the following beneficial effects:

[0017] The utility model manually completes the placement of the optical substrate, automatically completes the lamination of the soft film, and performs semi-automatic electric holographic waveguide cylindrical lamination. Through the weight of the load block, the interaction between the load block and the slow-weight spring is maintained, so that the horizontal slide table and the pressure roller form a dynamic balance in the vertical direction, so that the pressure roller can still maintain a uniform lamination pressure on the curved substrate during the process of moving up and down following the bending thickness of the curved substrate, so that the produced soft film will not produce problems such as bubbles, wrinkles, local stress deformation, etc., and the display effect of the holographic waveguide is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a specific implementation mode of the utility model;

[0020] Figure 2 It is a schematic diagram of the connection between the shaft guide rail and the vertical slide in a specific implementation manner of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the mold in a specific implementation manner of the utility model;

[0022] Figure 4 This is a schematic diagram of the connection between the mold and the positioning pin in a specific implementation manner of the utility model

[0023] Figure 5 This is a schematic diagram of the connection between the connecting shaft and the circular bearing in a specific embodiment of the utility model;

[0024] Figure 6 It is a schematic diagram of the connection between the gland and the adapter plate in a specific embodiment of the utility model;

[0025] Figure 7 This is a schematic diagram of the connection between the connecting shaft and the U-shaped bearing in a specific embodiment of the utility model;

[0026] Figure 8 It is a schematic diagram of the connection between the mold and the curved substrate in a specific embodiment of the utility model;

[0027] Fig. 9 The following is a schematic diagram of the connection between the pressure roller and the vertical slide in a specific embodiment of the utility model (without the load block):

[0028] Among them: 1. Pressure roller; 2. Horizontal slide; 3. Curved substrate; 4. Mold; 5. Limit bearing; 6. Vertical slide; 7. Shaft guide; 8. Buffer spring; 9. Base; 10. Load block; 11. Connecting shaft; 12. U-shaped bearing; 13. Circular bearing; 14. U-shaped shaft; 15. Adapter plate; 16. U-shaped groove; 17. Pressure cover; 18. Linear bearing; 19. Locating pin. DETAILED DESCRIPTION

[0029] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0030] The following describes the implementation methods of the present invention through specific concrete examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The present invention can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the utility model, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0032] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0033] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0034] In one embodiment of the present invention, a cylindrical coating device for a holographic waveguide grating soft film is provided, such as Figures 1 to 9 As shown, it includes a pressing roller 1, a horizontal slide 2 and a curved substrate 3. The curved substrate 3 is placed on the horizontal slide 2. A mold 4 for fixing the curved substrate 3 is arranged on the horizontal slide 2, so that the curved substrate 3 is driven to move horizontally by the movement of the horizontal slide 2. The pressing roller 1 is arranged above the curved substrate 3. In the process of the horizontal slide 2 driving the curved substrate 3 to move horizontally, downward pressure is provided to the curved substrate 3. Limit bearings 5 ​​that can move up and down are arranged at both horizontal ends of the pressing roller 1. The uniform pressure of the pressing roller 1 on the curved substrate 3 is ensured by adjusting the height of the pressing roller 1.

[0035] The horizontal ends of the pressure roller 1 are respectively provided with vertical slides 6 supporting the limit bearings 5, each limit shaft is arranged inside the vertical slide 6 on the same side, and the two vertical slides 6 are respectively provided with vertically extending shaft guides 7, and the two shaft guides 7 pass through the middle of the corresponding vertical slides 6, and are slidably connected with the corresponding vertical slides 6, so that the vertical slides 6 and the pressure roller 1 move up and down synchronously. The pressure roller 1 adopts a polyurethane sintered roller, the core shaft of the pressure roller 1 is made of stainless steel, and the polyurethane hardness is A90. The limit bearings 5 ​​are arranged on both sides of the axis of the pressure roller 1, and the horizontal ends of the pressure roller 1 are provided with connecting shafts 11 passing through the inside of the limit bearings 5 ​​on the same side. The limit bearings 5 ​​include a circular bearing 13 and a U-shaped bearing 12, which are respectively located at the horizontal ends of the pressure roller 1, one end of the pressure roller 1 passes through the inner ring of the bearing horizontally, and the other end of the pressure roller 1 is a U-shaped shaft 14, and the U-shaped shaft 14 of the pressure roller 1 penetrates into the inside of the U-shaped bearing 12. The U-shaped bearing 12 includes an adapter plate 15, a U-shaped groove 16 and a pressure cover 17. The pressure cover 17 is arranged above the U-shaped shaft 14, and the pressure cover 17 presses the upper end surface of the U-shaped shaft 14. The adapter plate 15 and the U-shaped groove 16 are arranged below the U-shaped shaft 14. The pressure cover 17 presses the upper end surface of the U-shaped shaft 14 and presses the U-shaped shaft 14 into the U-shaped groove of the adapter plate 15. The pressure cover 17 and the adapter plate 15 are fastened by screws, and the connecting shaft 11 and the pressure cover 17 are fastened by pins.

[0036] A slow-weight spring 8 and a base 9 supporting the vertical slide 6 are arranged below the vertical slide 6. The slow-weight spring 8 is arranged between the vertical slide 6 and the base 9. The upper end of the slow-weight spring 8 abuts against the lower end of the vertical slide 6, and the corresponding vertical slide 6 can be supported by the elastic force of the slow-weight spring 8. Corresponding load blocks 10 are arranged above the two vertical slides 6. Each load block 10 and each slow-weight spring 8 are sleeved on the shaft guide 7 on the same side. A linear bearing 18 sleeved on the shaft guide 7 is arranged inside the vertical slide 6, and the vertical slide 6 is through-fitted with the shaft guide 7 through the linear bearing 18.

[0037] The upper surface of the mold 4 is curved upward, and the curvature of the upper surface of the mold 4 matches the curvature of the curved substrate 3. The upper surface of the mold 4 fits the lower part of the curved substrate 3, and plays a supporting role for the curved substrate 3. The lateral sides of the mold 4 are fixedly connected to the horizontal slide 2. The curved substrate 3 adopts a waveguide optical substrate, and the curved substrate 3 is connected to the mold 4 by a positioning pin 19 provided through the mold 4. The upper curved surface of the curved substrate 3 is 0.1 to 0.5 mm higher than the upper curved surface of the mold 4. The mold 4 is provided with a line mark for positioning and a notch mark for grasping. The horizontal slide 2 adopts a square guide rail electric linear slide, and a ball screw is provided inside the horizontal slide 2 for screw transmission. The horizontal slide 2 is provided with a guide rail inside. The guide rail adopts a linear slider guide rail, which is connected to a corresponding limit switch and a zero position sensor. The electric control system of the horizontal slide 2 is controlled by a handheld stepper motor control box.

[0038] During use of this embodiment, the curved substrate 3 is first placed on the corresponding mold 4, and then a load block 10 of appropriate weight is selected, one end of the grating soft film is placed at the marked position of the mold 4, and the other end is pinched by hand, and then the horizontal slide 2 is moved to the initial position relative to the pressure roller 1, and then the button switch of the horizontal slide 2 is started, and the cylindrical coating device will automatically transmit the curved substrate 3 for coating; during the whole process, the mold 4 and the corresponding curved substrate 3 are first driven by the horizontal slide 2 to move parallel to the pressure roller 1. Because limited bearings 5 ​​are installed at both ends of the pressure roller 1, the pressure roller 1 will rotate under the driving of friction, and at the same time, the two ends of the pressure roller 1 are connected to the vertical slide 6 and can slide up and down along the shaft guide 7. Under the self-gravity of the pressure roller 1, the vertical slide and the load block 10, the pressure roller 1 fits the upper curved surface of the mold 4 and the curved substrate 3 to extrude the grating soft film, and finally completes the lamination action of the grating soft film. In short, the utility model has the advantages of simple structure, convenient operation, uniform pressure on the cylindrical coating and good display effect of the produced soft film.

[0039] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A cylindrical coating device for a holographic waveguide grating soft film, characterized in that: The invention comprises a pressure roller (1), a horizontal slide (2) and a curved substrate (3); the curved substrate (3) is placed on the horizontal slide (2); a mold (4) for fixing the curved substrate (3) is arranged on the horizontal slide (2); the curved substrate (3) is driven to move horizontally by the movement of the horizontal slide (2); the pressure roller (1) is arranged above the curved substrate (3); downward pressure is provided to the curved substrate (3) during the process of the horizontal slide (2) driving the curved substrate (3) to move horizontally; limit bearings (5) capable of moving up and down are arranged at both horizontal ends of the pressure roller (1); and uniform pressure of the pressure roller (1) on the curved substrate (3) is ensured by adjusting the height of the pressure roller (1).

2. The cylindrical coating device of a holographic waveguide grating soft film according to claim 1, characterized in that: The horizontal ends of the pressure roller (1) are respectively provided with vertical slides (6) supporting limit bearings (5), each limit shaft extends into the interior of the vertical slide (6) on the same side, and the interiors of the two vertical slides (6) are both provided with vertically extending shaft guides (7), and the two shaft guides (7) respectively pass through the middle of the corresponding vertical slides (6) and are slidably connected with the interior of the corresponding vertical slides (6), so that the vertical slides (6) and the pressure roller (1) move up and down synchronously.

3. The cylindrical coating device of a holographic waveguide grating soft film according to claim 2, characterized in that: A slow-reweight spring (8) and a base (9) for supporting the vertical slide (6) are arranged below the vertical slide (6); the slow-reweight spring (8) is arranged between the vertical slide (6) and the base (9); the top of the slow-reweight spring (8) is against the lower end surface of the vertical slide (6); the corresponding vertical slide (6) can be supported by the elastic force of the slow-reweight spring (8); corresponding load blocks (10) are arranged above the two vertical slides (6); each load block (10) and each slow-reweight spring (8) are sleeved on the shaft guide rail (7) on the same side.

4. The cylindrical coating device of a holographic waveguide grating soft film according to claim 3, characterized in that: The upper surface of the mold (4) is curved upward, and the degree of curvature of the upper surface of the mold (4) matches the degree of bending of the curved substrate (3). The upper surface of the mold (4) fits the lower part of the curved substrate (3) to support the curved substrate (3), and the lateral sides of the mold (4) are fixedly connected to the horizontal slide (2).

5. The cylindrical coating device of a holographic waveguide grating soft film according to claim 4, characterized in that: The curved substrate (3) is a waveguide optical substrate. The curved substrate (3) is connected to the mold (4) via a positioning pin (19) that passes through the mold (4). The upper curved surface of the curved substrate (3) is 0.1 to 0.5 mm higher than the upper curved surface of the mold (4). The mold (4) is provided with a line mark for positioning and a notch mark for grasping.

6. The cylindrical coating device of a holographic waveguide grating soft film according to claim 5, characterized in that: The pressing roller (1) is a polyurethane sintered roller, the core shaft of the pressing roller (1) is made of stainless steel, the polyurethane hardness is A90, the limit bearing (5) is arranged on both sides of the axis of the pressing roller (1), and the horizontal ends of the pressing roller (1) are both provided with a connecting shaft (11) passing through the inside of the limit bearing (5) on the same side.

7. The cylindrical coating device of a holographic waveguide grating soft film according to claim 6, characterized in that: The limit bearing (5) comprises a circular bearing (13) and a U-shaped bearing (12), wherein the circular bearing (13) and the U-shaped bearing (12) are respectively located at two horizontal ends of the pressure roller (1), one end of the pressure roller (1) horizontally passes through the inner ring of the circular bearing (13), and the other end of the pressure roller (1) is a U-shaped shaft (14), and the U-shaped shaft (14) of the pressure roller (1) penetrates into the interior of the U-shaped bearing (12).

8. The cylindrical coating device of a holographic waveguide grating soft film according to claim 7, characterized in that: The U-shaped bearing (12) comprises an adapter plate (15), a U-shaped groove (16) and a pressure cover (17). The pressure cover (17) is arranged above the U-shaped shaft (14). The pressure cover (17) presses the upper end surface of the U-shaped shaft (14). The adapter plate (15) and the U-shaped groove (16) are arranged below the U-shaped shaft (14). The pressure cover (17) presses the U-shaped shaft (14) into the U-shaped groove (16) of the adapter plate (15). The pressure cover (17) and the adapter plate (15) are fastened by screws, and the connecting shaft (11) and the pressure cover (17) are fastened by pins.

9. The cylindrical coating device of a holographic waveguide grating soft film according to claim 8, characterized in that: A linear bearing (18) sleeved on the shaft guide rail (7) is arranged inside the vertical slide (6), and the vertical slide (6) is through-fitted with the shaft guide rail (7) via the linear bearing (18).

10. A cylindrical coating device for a holographic waveguide grating soft film according to any one of claims 1 to 9, characterized in that: The horizontal slide (2) adopts a square guide rail electric linear slide, a ball screw is arranged inside the horizontal slide (2) for screw transmission, a guide rail is arranged inside the horizontal slide (2), the guide rail adopts a linear slider guide rail, which is connected to a corresponding limit switch and a zero position sensor, and the electric control system of the horizontal slide (2) is controlled by a handheld stepper motor control box.

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