Waveguide processing device

Abstract

The utility model provides a waveguide processing device which comprises a cutting head, a cooling gas channel is arranged in the cutting head in the cutting direction, one end of the cooling gas channel penetrates through the bottom of the cutting head, and the cooling gas channel is used for providing sprayed cooling gas; and the particle containing part comprises a containing opening and a containing piece connected with the containing opening, and the containing opening is detachably formed in the lower side of the cutting position of the waveguide to be machined. In this way, particulate matter generated in the cutting process can be effectively discharged.

Description

Technical Field

[0001] The present application relates to the field of resin processing technology, and in particular to a waveguide processing device. Background Art

[0002] The optical module of an augmented reality (AR) near-eye display device usually consists of two parts: an optical machine (or light engine) and an optical combiner. Waveguides are the preferred solution for optical combiners due to their thin thickness, light weight, and good light transmittance. The resin waveguide is cut into the shape of glasses by a CO2 laser cutter. The resin material produces polycarbonate particles (particle diameter between 10nm and 1000nm) during the high-energy and high-frequency gasification process. The polycarbonate particles cannot be effectively discharged and will remain on the surface of the grating structure or in the grooves of the grating structure, thereby affecting the human eye's observation effect, imaging clarity, light diffraction efficiency, and ghosting. Utility Model Content

[0003] Based on this, the present application provides a waveguide processing device that can effectively discharge particulate matter generated during the cutting process.

[0004] In a first aspect, the present application provides a waveguide processing device, comprising:

[0005] A cutting head, wherein a cooling gas channel is provided inside the cutting head in the cutting direction, one end of the cooling gas channel passes through the bottom of the cutting head, and the cooling gas channel is used to provide sprayed cooling gas;

[0006] a particle receiving component, the particle receiving component comprising a receiving opening and a receiving member connected to the receiving opening, wherein the receiving opening is detachably disposed below a cutting position of the waveguide to be processed;

[0007] In which, when the device is working, the bottom of the cutting head is close to the upper side of the cutting position of the waveguide to be processed for cutting, and the cooling gas cools the high-temperature material generated during cutting to form particulate matter. The particulate matter enters the storage part through the storage port under the jet power of the cooling gas.

[0008] In some embodiments, the storage member includes a storage cavity, and the inner side wall of the storage cavity is provided with a sticky sticker, and the sticky sticker can adhere to the particulate matter it comes into contact with.

[0009] In some embodiments, the sticky notes are replaceable.

[0010] In some embodiments, the sticky tape includes multiple layers of tape, and each layer of tape can be torn off after adhering to the particulate matter.

[0011] In some embodiments, the storage member includes a storage pipe and a dust collector, one end of the storage pipe is connected to the dust collector, and the other end of the storage pipe is connected to the storage port.

[0012] In some embodiments, the cutting head comprises a laser cutting head.

[0013] In some embodiments, the laser cutting head comprises a carbon dioxide laser cutting head.

[0014] In some embodiments, the material of the waveguide to be processed includes one of resin, glass, and silicon wafer.

[0015] The waveguide processing device of the embodiment of the present application includes a cutting head and a particle receiving component. A cooling gas channel is provided inside the cutting head in the cutting direction. One end of the cooling gas channel passes through the bottom of the cutting head for providing sprayed cooling gas. The particle receiving component includes a receiving port and a receiving component connected to the receiving port. The receiving port is detachably provided on the lower side of the cutting position of the waveguide to be processed. During operation, the cooling gas cools the high-temperature material generated during cutting to form particulate matter. The particulate matter enters the receiving component through the receiving port under the jet power of the cooling gas, thereby effectively discharging the particulate matter generated during the cutting process, thereby solving problems that affect the observation effect of the human eye and the imaging clarity, light diffraction efficiency, ghosting, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of cutting a resin waveguide to be processed by a CO2 laser cutting method in the related art;

[0017] Figure 2 yes Figure 1 Schematic diagram of polycarbonate particles formed in the process falling on the surface of the waveguide or falling inside the grooves of the grating structure;

[0018] Figure 3 yes Figure 1 Schematic diagram of how the resin waveguide obtained by cutting affects the human eye's observation effect and imaging clarity, light diffraction efficiency, and ghosting;

[0019] Figure 4 It is a structural schematic diagram of an embodiment of a waveguide processing device of the present application.

[0020] Description of main components and symbols:

[0021] 1. Cutting head; 11. Cooling gas channel; 21. Storage port; 22. Storage component; 221. Storage cavity; 222. Sticky sticker; 223. Storage pipe; 224. Dust extractor; 3. Waveguide to be processed. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0023] It should also be understood that the terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0024] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0025] The optical module of an augmented reality (AR) near-eye display device usually consists of two parts: an optical machine (or light engine) and an optical combiner. The optical machine consists of an image source and a projection lens. The image source is used to generate the image to be displayed, and the projection lens projects the image displayed by the image source to infinity or a specified distance. The optical combiner can transmit the signal light emitted by the optical machine in a directionally directed manner to the human eye, forming the image to be displayed on the retina; at the same time, the optical combiner has good transmittance to the ambient light in the real world. Through the optical combiner, the human eye can clearly see the real-world scenery and the image projected by the optical machine at the same time; the waveguide is the preferred solution for the optical combiner because of its thin thickness, light weight and good light transmittance.

[0026] The resin waveguide is usually circular and is cut into the shape of glasses by CO2 laser cutting; Figure 1 As shown in the figure, by focusing the extremely fine spot of the carbon dioxide laser onto the resin material, the high energy is absorbed by the resin material, and the resin material at the laser spot is vaporized by high frequency. During the cutting process, the polycarbonate particles in the resin material cannot be effectively discharged, and the polycarbonate particles fall on the waveguide surface or fall inside the groove of the grating structure, such as Figure 2 shown.

[0027] like Figure 3 As shown, CO2 cuts the resin waveguide material, and the resin material produces polycarbonate particles (particle diameter is between 10nm-1000nm) during the high-energy and high-frequency gasification process. These polycarbonate particles remain on the surface of the grating structure or in the grooves of the grating structure and cannot be effectively discharged, thereby affecting the human eye observation effect and imaging clarity, light diffraction efficiency, and ghosting.

[0028] In order to solve the above technical problems, an embodiment of the present application provides a waveguide processing device, which includes a cutting head and a particle receiving component. A cooling gas channel is provided inside the cutting head in the cutting direction, and one end of the cooling gas channel passes through the bottom of the cutting head for providing sprayed cooling gas; the particle receiving component includes a receiving port and a receiving member connected to the receiving port, and the receiving port is detachably provided on the lower side of the cutting position of the waveguide to be processed; during operation, the cooling gas cools the high-temperature substance generated during cutting to form particulate matter, and the particulate matter enters the receiving member through the receiving port under the jet power of the cooling gas, thereby effectively discharging the particulate matter generated during the cutting process, thereby being able to solve problems affecting the human eye's observation effect and imaging clarity, light diffraction efficiency, ghosting, etc.

[0029] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0030] See also Figure 4 , Figure 4 It is a structural diagram of an embodiment of a waveguide processing device of the present application, wherein the device comprises: a cutting head 1 and a particle receiving component.

[0031] A cooling gas channel 11 is provided inside the cutting head 1 in the cutting direction, and one end of the cooling gas channel 11 passes through the bottom of the cutting head 1. The cooling gas channel 11 is used to provide cooling gas for injection, so the cooling gas can pass through the bottom of the cutting head 1 through the cooling gas channel 11, and the cooling gas itself has injection power; the cooling gas channel 11 can be provided around the inside of the cutting head 1, or on one side of the inside of the cutting head 1. Cooling gases include, but are not limited to, air, nitrogen, helium and other gases. More common cooling gases include nitrogen. In one embodiment, the temperature range of liquid nitrogen can be controlled between 0° and -10°, and the pressure can be controlled between 300kpa and 320kpa to provide injection power; the pressure can be maintained for 8 to 10 seconds.

[0032] The particle collection component includes a collection port 21 and a collection member 22 connected to the collection port 21. The collection port 21 is detachably disposed below the cutting position of the waveguide 3 to be processed. The detachable configuration of the collection port 21 facilitates its fixation during operation and removal when not in operation. Compared to related art methods that place the particle collection member above the object to be processed, the collection port 21 of the embodiment of the present application is disposed below the cutting position of the waveguide to be processed. The collection port 21 and the collection member 22 are located precisely in the direction of the cooling gas injection, allowing for more convenient and effective collection of particulate matter.

[0033] In which, when the waveguide processing device is working, the bottom of the cutting head 1 is close to the upper side of the cutting position of the waveguide to be processed for cutting, and the cooling gas cools the high-temperature material generated during cutting to form particulate matter. The particulate matter enters the storage part 22 through the storage port 21 under the jet power of the cooling gas.

[0034] The waveguide processing device of the embodiment of the present application includes a cutting head 1 and a particle receiving component. A cooling gas channel 11 is provided inside the cutting head 1 in the cutting direction. One end of the cooling gas channel 11 passes through the bottom of the cutting head 1 for providing sprayed cooling gas; the particle receiving component includes a receiving port 21 and a receiving component 22 connected to the receiving port 21, and the receiving port 21 is detachably provided on the lower side of the cutting position of the waveguide 3 to be processed; during operation, the cooling gas cools the high-temperature material generated during cutting to form particulate matter, and the particulate matter enters the receiving component 22 through the receiving port 21 under the jet power of the cooling gas, thereby effectively discharging the particulate matter generated during the cutting process, thereby being able to solve problems such as affecting the observation effect of the human eye and imaging clarity, light diffraction efficiency, and ghosting.

[0035] In some embodiments, the storage member 22 includes a storage cavity 221 , and an inner wall of the storage cavity 221 is provided with a sticky sticker 222 , and the sticky sticker 222 can adhere to the particulate matter it comes into contact with.

[0036] The storage cavity 221 is used to store particulate matter ejected by the jet power of the cooling gas. The inner wall of the storage cavity 221 is provided with a sticky dust sticker 222. The sticky dust sticker 222 can adhere to the particulate matter it contacts, thereby preventing the particulate matter from floating in the storage cavity as much as possible, preventing the settled particulate matter from floating again under the influence of the newly entered particulate matter, and preventing the floating particulate matter from settling back onto the surface of the grating structure or settling back into the groove of the grating structure and being unable to be effectively discharged.

[0037] In some embodiments, all inner side walls of the storage cavity 221 are provided with sticky stickers 222 .

[0038] In some embodiments, the sticky sticker 222 is replaceable. When the sticky sticker 222 is full of particulate matter, only the sticky sticker 222 needs to be replaced, without replacing the entire storage cavity 221, which can save costs.

[0039] In some embodiments, the sticky sticker 222 comprises multiple layers of tape, each layer of which can be removed after adhering to the particulate matter. Compared to sticky stickers, which consist of a single layer of tape, requiring a new layer of tape after each layer is used, the sticky sticker 222 of the present embodiment comprises multiple layers of tape. Once the current layer of tape is fully adhered to the particulate matter, it can be removed. After being removed, the current layer of tape can then be used to adhere to the particulate matter, and this cycle continues. This multi-layered tape is simple and convenient, significantly reducing replacement time.

[0040] In some embodiments, the storage member 22 includes a storage pipe 223 and a dust collector 224 , one end of the storage pipe 223 is connected to the dust collector 224 , and the other end of the storage pipe 223 is connected to the storage port 21 .

[0041] The storage unit 22 includes a storage duct 223 and a dust extractor 224. The dust extractor 224 collects particulate matter in a centralized manner, which has high collection efficiency and can prevent particulate matter from floating. In one embodiment, the negative suction pressure of the dust extractor 224 can be controlled between -80 kPa and -100 kPa.

[0042] In some embodiments, as Figure 4 As shown, the storage member 22 may include a storage cavity 221 , a storage duct 223 and a dust collector 224 .

[0043] A cooling gas (such as liquid nitrogen, the temperature range of the liquid nitrogen is controlled between 0° and -10°, the pressure is between 300kPa---320kPa, and the pressure is maintained for 8S to 10S) is blown vertically downward inside the cutting head 1, and a receiving cavity 221, a receiving pipe 223 and a dust collector 224 (the negative suction pressure of the dust collector is controlled between -80 and -100kPa) are provided, so that the high-temperature material generated by high-energy and high-frequency gasification is cooled into particulate matter by the cooling gas, and the cooled particulate matter is dropped into the receiving cavity 221 and the dust collector 224 respectively through the receiving cavity 221 and the dust collector 224. The dust collector 224 is connected to the storage opening 21, that is, the storage cavity 221, the storage pipe 223, and the dust collector 224 are also connected. Therefore, the dust collector 224 can also suck the particulate matter floating in the storage cavity 221 into the dust collector 224 for collection. The inner wall of the storage cavity 221 is provided with a sticky dust sticker 222. The sticky dust sticker 222 can prevent some particles in the storage cavity 221 from not being sucked into the dust collector 224, thereby preventing these particles from floating inside the storage cavity 221. The sticky dust sticker 222 can be replaced regularly. In this way, the problem of particulate matter remaining on the surface of the optical waveguide structure or inside the groove can be effectively solved.

[0044] In some embodiments, the cutting head 1 comprises a laser cutting head. Laser cutting is a common cutting method that can perform fine cutting.

[0045] In some embodiments, the laser cutting head comprises a carbon dioxide laser cutting head.

[0046] The operating principle of a CO2 laser is based on a gas discharge that excites energy level transitions in CO2 molecules, causing them to vibrate and rotate, generating a high-power laser beam with a specific wavelength. CO2 gas is the working medium for laser generation. A CO2 laser tube is filled with a certain ratio of CO2, nitrogen, and helium. When a high voltage is applied to the laser tube, the gases within the tube are excited. Nitrogen molecules gain energy from collisions with electrons and transfer this energy to CO2 molecules, causing them to transition from their ground state to a higher energy level before rapidly transitioning back to a lower energy level, releasing energy and causing the molecules to vibrate and rotate. These vibrations and rotations cause the laser energy levels in the CO2 molecules to resonate with those in the other two gases, causing them to emit a laser beam with a specific wavelength of 10.6 microns. This laser beam is amplified by repeated trips between convex mirrors before being transmitted through a reflector. Because CO2 lasers have a longer wavelength and are well absorbed by water in biological tissue, they are commonly used in the medical field for cutting, vaporizing, and coagulating tissue. They are also commonly used in industry for material processing, such as cutting, welding, and surface treatment.

[0047] In some embodiments, the material of the waveguide to be processed includes one of resin, glass, and silicon wafer.

[0048] The method for using the waveguide processing device according to the embodiment of the present application includes:

[0049] (1) Placing the waveguide to be processed: The waveguide to be processed is placed on the support column, and the receiving port of the particle receiving component for recovering the particulate matter is detachably arranged on the lower side of the cutting position of the waveguide to be processed.

[0050] (2) Fixing the waveguide to be processed: The waveguide to be processed is fixed on the support column by adsorption;

[0051] (3) The cutting head releases cooling gas and the dust collector is turned on simultaneously to extract it;

[0052] (4) Cutting of the waveguide to be processed.

[0053] It should be understood that the terms used in the present specification are only used to describe specific embodiments and are not intended to limit the present application.

[0054] It will also be understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0055] The above descriptions are merely specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and such modifications or substitutions should be included within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A waveguide processing device, characterized in that: The device comprises: A cutting head, wherein a cooling gas channel is provided inside the cutting head in the cutting direction, one end of the cooling gas channel passes through the bottom of the cutting head, and the cooling gas channel is used to provide sprayed cooling gas; a particle receiving component, the particle receiving component comprising a receiving opening and a receiving member connected to the receiving opening, wherein the receiving opening is detachably disposed below a cutting position of the waveguide to be processed; In which, when the device is working, the bottom of the cutting head is close to the upper side of the cutting position of the waveguide to be processed for cutting, and the cooling gas cools the high-temperature material generated during cutting to form particulate matter. The particulate matter enters the storage part through the storage port under the jet power of the cooling gas.

2. The device according to claim 1, characterized in that The storage member includes a storage cavity, and the inner side wall of the storage cavity is provided with a sticky sticker, and the sticky sticker can adhere to the particulate matter it contacts.

3. The device according to claim 2, characterized in that The sticky sticker is replaceable.

4. The device according to claim 3, characterized in that The sticky sticker includes multiple layers of tape, and each layer of tape can be torn off after adhering to the particulate matter.

5. The device according to claim 1, characterized in that The storage member includes a storage pipe and a dust collector, one end of the storage pipe is connected to the dust collector, and the other end of the storage pipe is connected to the storage port.

6. The device according to claim 1, characterized in that The cutting head comprises a laser cutting head.

7. The device according to claim 6, characterized in that The laser cutting head includes a carbon dioxide laser cutting head.

8. The device according to claim 1, characterized in that The material of the waveguide to be processed includes one of resin, glass, and silicon wafer.

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