A processing method of an end face coated light guide rod

Abstract

The application provides a processing method of an end face coated light guide rod, comprising the following steps: polishing first and second adjacent side faces of a blank; fixing the blank on a light cement disc based on the first and second side faces, processing two end faces of the blank to obtain two finished end faces; coating the two finished end faces to form two finished end faces coated with films, and arranging end face protection pieces on the two finished end faces coated with films; processing a third side face to obtain a third finished side face, and processing the first side face to obtain a first finished side face; arranging side face protection pieces on the third finished side face and the first finished side face respectively; processing a fourth side face to obtain a fourth finished side face, and processing the second side face to obtain a second finished side face. The problems of high processing cost and low efficiency of the light guide rod in the prior art are solved.

Description

Technical Field

[0001] This application relates to the field of optical guide rod processing technology, and more specifically, to a processing method for an optical guide rod with end face coating. Background Technology

[0002] Optical guide rods with end-face coating are commonly used optical components. Typically, an optical guide rod is a cuboid with four long sides and two end faces. The finished product requires coating on both end faces. Besides ensuring the dimensions are correct, it is also necessary to ensure that the coating is not damaged and that there are no chips or chips on the edges.

[0003] Therefore, the existing processing flow for end-face coated optical guide rods is as follows: first, process the four long side surfaces to the finished size, and finally process the coated end face. Since the end face to be coated is processed last, it is necessary to ensure its perpendicularity to the side surfaces during processing. This perpendicularity requirement is quite high. When the processed side surfaces are protected by mounting plates, the side surfaces are often covered by the mounting plates, which often introduces errors in the parallelism of the mounting plates, leading to inaccurate judgment of this perpendicularity control during the process. This makes it difficult to guarantee the perpendicularity between the end face and the side surfaces. Using the existing process for mass production of optical guide rods results in excessive costs, very low efficiency, and very low yield.

[0004] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0005] The purpose of this application is to provide a processing method for an optical guide rod with end-face coating, which solves the problems in the prior art that it is difficult to guarantee the perpendicularity between the end face and the side face of the optical guide rod, and that mass production of optical guide rods will lead to excessive costs, low efficiency and low yield.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] This application provides a method for processing an optical guide rod with end-face coating, including the following steps:

[0008] A blank part is provided, and the adjacent first side and second side of the blank part are polished, wherein the right angle between the polished first side and second side reaches a predetermined angle requirement, and the polished surface shape meets the predetermined gloss requirements.

[0009] Using the first and second sides as references, the blank is fixed onto the light adhesive disc, and the two end faces of the blank are machined to obtain the finished end faces.

[0010] The two finished product end faces are coated to form coated finished product end faces, and end face protection parts are set on the coated finished product end faces at both ends;

[0011] Apply the polished first side to the adhesive plate, process the opposite third side to obtain the third finished side, apply the third finished side to the adhesive plate, process the first side to obtain the first finished side.

[0012] Side protective components are provided on the sides of the third finished product and the first finished product, respectively;

[0013] Apply the polished second side to the adhesive plate, process the opposite fourth side to obtain the fourth finished side, apply the fourth finished side to the adhesive plate, and process the second side to obtain the second finished side.

[0014] In an optional embodiment, in the step of providing a blank and polishing adjacent first and second sides of the blank:

[0015] Each surface of the blank has a blank allowance of a predetermined thickness.

[0016] In an optional embodiment, the step of fixing the blank to the light adhesive disc based on the first and second side surfaces, and machining the two end faces of the blank to obtain the finished end faces includes:

[0017] Using the polished first side as a reference, apply the polished second side to the body with adhesive.

[0018] Apply the adhesive to the adhesive tray and process the two end faces of the blank part.

[0019] In an optional embodiment, after the step of applying a polished second side to the substrate using the polished first side as a reference, the method further includes:

[0020] Inspect and adjust the angle of the upper plate on the first side to ensure that the blank part reaches the predetermined alignment state.

[0021] In an optional embodiment, in the step of coating two finished end faces to form coated finished end faces, and providing end face protective members on the coated finished end faces at both ends:

[0022] End face protection components are bonded to the coated finished product end faces at both ends, wherein the thickness of the adhesive layer and the bonding angle of the end face protection components are controlled to meet the predetermined requirements.

[0023] In an optional embodiment, in the steps of applying a polished first side surface to a photoresist plate, processing an opposing third side surface to obtain a third finished side surface, applying a photoresist plate to the third finished side surface, and processing the first side surface to obtain a first finished side surface:

[0024] A predetermined thickness is processed on the third side surface to remove the chamfer and chipped edges between the third side surface and the finished coated surfaces at both ends;

[0025] A predetermined thickness is processed on the first side surface to remove the chamfer and chipped edges between the first side surface and the finished coated end faces at both ends.

[0026] In an optional embodiment, in the steps of applying a polished second side surface to a photoresist plate, processing the opposing fourth side surface to obtain a fourth finished side surface, applying a photoresist plate to the fourth finished side surface, and processing the second side surface to obtain a second finished side surface:

[0027] A predetermined thickness is processed on the fourth side surface, and the chamfers and chipped edges between the fourth side surface and the end faces of the coated finished products at both ends are removed, as are the chamfers and chipped edges between the fourth side surface and the first and third finished product sides respectively.

[0028] A predetermined thickness is processed on the second side, and the chamfers and chipped edges between the second side and the end faces of the coated finished products at both ends are removed. The chamfers and chipped edges between the second side and the first and third finished product sides are also removed.

[0029] In an optional embodiment, in the step of providing side protective members on the third finished product side and the first finished product side respectively:

[0030] Side protective parts are glued to the third and first finished product sides respectively.

[0031] In an optional embodiment, both the end face protector and the side protector are glass discs.

[0032] In an optional embodiment, after the steps of applying the polished second side surface to the adhesive pad, processing the opposing fourth side surface to obtain the fourth finished side surface, applying the fourth finished side surface to the adhesive pad, and processing the second side surface to obtain the second finished side surface, the method further includes:

[0033] The end face protection is removed from the end face of the coated finished product by heating and soaking, and the side protection is removed from the side of the first and third finished products respectively.

[0034] The beneficial effects of the processing method for an end-face coated optical guide rod provided in this application are at least as follows: First, the adjacent first and second side surfaces are polished to ensure their perpendicularity. Then, the end face of the optical guide rod is processed using these surfaces as a reference. This effectively ensures the perpendicularity of the finished end face with the reference long side surface. After coating the finished end face and then bonding the end face protective component, the shape is processed using the first and second side surfaces, which ensure perpendicularity, as references. This not only greatly reduces the problem of workpiece loss and scrap during coating but also reduces the requirements for matching the substrate by using the polished long side surface as a processing reference after ensuring the basic angle. This eliminates the influence of substrate quality on the parts, saves processing costs, and improves processing efficiency, enabling mass production of optical guide rod products. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A flowchart illustrating the main steps of a processing method for an end-face coated optical guide rod provided in this application embodiment;

[0037] Figure 2 A flowchart illustrating the detailed steps of a method for processing an end-face coated optical guide rod according to an embodiment of this application;

[0038] Figure 3 A schematic diagram of the blank in a perspective state in a processing method for an end-face coated optical guide rod provided in an embodiment of this application;

[0039] Figure 4 This is a schematic diagram of the structure during the processing of the end face in a processing method for an optical guide rod with end face coating provided in an embodiment of this application;

[0040] Figure 5 This is a schematic diagram of the structure during the processing of the first and third sides in a processing method for an end-face coated optical guide rod provided in an embodiment of this application.

[0041] Figure 6 This is a schematic diagram of the structure during the processing of the second and fourth sides in a processing method for an end-face coated optical guide rod provided in an embodiment of this application.

[0042] The following are the labeling elements in the figure:

[0043] 100. Blank part; 110. First side; 120. Second side; 130. Third side; 140. Fourth side; 150. End face; 200. Finished coated end face; 210. First finished side; 220. Third finished side; 300. End face protection; 400. Side protection; 500. Backrest. Detailed Implementation

[0044] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0045] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0046] The following is an explanation of the names used in this application:

[0047] Glossy lamination: Glossy lamination is a process that uses intermolecular attraction to bond two surfaces tightly together. The intermolecular attraction between surfaces is a statistical physical phenomenon; it doesn't act on the entire glossy lamination surface, but rather between the microscopic peaks and troughs of the two surfaces. Because these peaks and troughs are small and densely packed, the statistical area generating molecular attraction is quite large, sufficient to bond the two surfaces together. Furthermore, glossy lamination involves first applying pressure to the edges of the part, causing that area to be coated first. Near the interface between the coated and uncoated surfaces, deformation occurs due to molecular attraction, causing the uncoated surfaces to reach the range of intermolecular attraction. Thus, the glossy lamination bonding surface gradually expands until the entire bonding surface is coated together. Compared to adhesive bonding, glossy lamination offers higher mechanical strength, more stable performance, and can maintain its properties for decades; it also exhibits less deformation and better cold and heat resistance. Optical bonding can be used for parts whose surfaces will deform during bonding, parts that are large in size and prone to delamination, parts that operate under high or low temperature conditions, or parts that operate in the short-wavelength range of optical harmonics (current optical adhesives have significant light energy loss in the short-wavelength range). However, optical bonding also requires very high manufacturing precision for the bonded surface.

[0048] Optical Adhesive Plate: A flat plate fixture used in the plate-forming process using the optical adhesive mounting method. It is generally circular, with a parallelism of ≤2″ for a single optical adhesive plate and a working surface shape (PV) ≤0.5fr@633nm (Φ150per). Surface Shape: PV (Peak to Valley), also known as peak-to-valley value, is a common indicator of the surface shape quality of optical surfaces. It refers to the height difference between the highest and lowest points within the sampling range (based on 2D contour lines or 3D data maps), after removing the reference plane. The PV value is expressed in physical length units, and its meaning is easy to understand. Based on the required reference plane, the maximum deviation range of all pixels directly reflects the current processing quality of the optical surface. According to long-term experience in optical testing, the PV value and another important surface shape indicator, RMS, often maintain a certain proportional relationship, generally around 2:1.

[0049] In existing technologies, the process involves first machining the four long sides to the finished size, and then machining the coated end face. This process requires using a mounting plate to machine the coated end face. Since the long sides have already been machined into finished sides, the mounting plate has strict requirements for surface shape, smoothness, and parallelism. Machining a suitable mounting plate is often more difficult than machining the optical guide rod itself. Furthermore, the mounting plate requires a match between the part and the mounting plate surface shape; if the adhesive is not tight enough, it is prone to detachment during machining; if the adhesive is too tight, the final disassembly is time-consuming and labor-intensive. Additionally, existing processes require adhesive to be applied to the mounting plate when machining the perpendicularity between the coated end face and the sides, which introduces errors in the parallelism of the mounting plate, leading to inaccurate control and judgment of the perpendicularity between the end face and the sides during the process. Therefore, this application proposes the following specific embodiments:

[0050] Please see Figure 1 This embodiment proposes a method for processing an end-face coated optical guide rod, used for the optical processing of optical guide rods. The processing method for this end-face coated optical guide rod mainly includes the following steps:

[0051] Step S100: Provide a blank part and polish the adjacent first side and second side of the blank part, wherein the right angle between the polished first side and second side reaches a predetermined angle requirement, and the polished surface shape meets the predetermined gloss requirements.

[0052] Please see Figure 3In the specific process, the blank 100 matches the outline of the final optical guide rod product. Therefore, the blank 100 is a hexahedron, which can be a cuboid or a cube. In this embodiment, the blank 100 is a cuboid, having: a first side 110 and a third side 130 arranged opposite each other, a second side 120 and a fourth side 140 arranged opposite each other, and two end faces 150 arranged opposite each other. These faces are the initial surface shapes in the blank stage. Since the parts produced in the subsequent processing are all generated on the basis of the blank, the structure of each surface on the part is described with reference to the surfaces of the blank.

[0053] Compared to the finished optical guide rod, each surface of the blank 100 has a predetermined blank allowance. Due to the requirements of coating clamping, the machining allowance of each surface needs to be at least 2mm. This ensures that there is sufficient allowance to machine the first side 110, the second side 120, the third side 130, and the fourth side 140 after coating.

[0054] The adjacent first side 110 and second side 120 of the blank part 100 are polished, mainly to ensure that the right angle between the polished first side 110 and second side 120 meets the predetermined angle requirement, and the surface shape meets the predetermined gluing requirements. Since gluing fixation is required in subsequent processing, one long side and the adjacent long side are polished first to ensure that the surface shape and the 90° angle between them meet the requirements. While ensuring the angle, the first side 110 and second side 120 can be used as references for processing subsequent surfaces. This ensures a unified processing reference. In particular, after the basic angle between the first side 110 and second side 120 is determined, gluing can be directly applied to the tooling to process the end face 150 to be coated, eliminating the influence of the pad quality on the part.

[0055] Step S200: Using the first and second sides as references, fix the blank onto the light adhesive disc, and process the two end faces of the blank to obtain the finished end faces.

[0056] Please see Figure 3 , Figure 4 In the specific process, since the basic angle between the first side 110 and the second side 120 is guaranteed through the aforementioned polishing process, one side is fixed with adhesive, and the two end faces 150 of the blank 100 are directly machined into finished end faces. Compared with the prior art where the end faces are machined last, since the sides are not machined to the required level, it is not necessary to use high-quality mounting plates and apply adhesive to the sides. By directly machining the end faces 150 on both sides to form finished end faces, the influence of mounting plate quality on the parts is eliminated.

[0057] Please see Figure 1 , Figure 2Therefore, step S200 specifically includes steps S210-S220, as follows:

[0058] Step S210: Using the polished first side as a reference, apply the polished second side to the body.

[0059] Please see Figure 4 The first side 110 and the second side 120 are two adjacent sides, one of which serves as an alignment clamping reference, while the other side serves as a fixing surface and is fixed to the support body 500 with adhesive. The support body 500 can be made of square bricks. The square bricks can support the blank 100, so that the end faces 150 at both ends of the blank 100 are in the processing position for easy processing.

[0060] After the blank 100 is glued to the support 500, the upper plate angle of the first side 110 is checked and adjusted to ensure that the blank 100 is in the predetermined upright position. Specifically, after the second side 120 is glued to the square brick, before the support 500 is glued to the glue tray, the upper plate angle of the first side 110 is observed using a comparator. If the upper plate angle exceeds the predetermined range, it is adjusted to ensure that the blank 100 is upright.

[0061] Step S220: Apply the adhesive to the adhesive tray and process the two end faces of the blank.

[0062] Please see Figure 4 In the specific process, after the upper plate angle of the first side 110 is qualified, the backing body 500 is fixed to the adhesive tray with light glue, and the blank part 100 is fixed on the large plate (adhesive tray) of the processing equipment by the backing body 500. The two end faces 150 of the blank part 100 are processed by forming the tray, and the dimensions of the end faces 150 are directly processed to the required position, forming finished end faces at both ends.

[0063] Please see Figure 1 Step S300: Coating the two finished product end faces to form coated finished product end faces, and setting end face protection components on the coated finished product end faces at both ends.

[0064] Please see Figure 3 , Figure 5 Specifically, during the process, end-face protective components 300 are bonded to the coated finished end faces 200 at both ends using adhesive. NOA65 adhesive can be used. The thickness of the adhesive layer and the bonding angle of the end-face protective components 300 are controlled to meet predetermined requirements. By controlling the thickness of the adhesive layer and the bonding angle of the end-face protective components 300, the coated finished end faces 200 are protected from damage during processing. When processing the four sides, the end-face protective components 300 participate in the side processing, ensuring that the parts do not chip or break without chamfering.

[0065] In this embodiment, the end face protection component 300 is a glass tray, and a regular glass tray is sufficient to meet the usage requirements. However, in the prior art, quartz trays are typically required for adhesive bonding. Therefore, bonding a regular glass tray usually replaces the adhesive bonding of a quartz tray, eliminating requirements on tray material, surface finish, and surface shape, thus reducing material costs.

[0066] Furthermore, existing technologies using adhesive bonding require precise matching between the parts and the bonding tray surface. If the adhesive bonding is not tight enough, the parts are prone to detaching during processing; if it is too tight, disassembly is time-consuming and labor-intensive. In contrast, the bonded glass bonding trays in this embodiment are easily removed, improving overall processing and turnover efficiency.

[0067] Step S400: Apply the polished first side surface to the adhesive plate, process the opposite third side surface to obtain the third finished side surface, apply the third finished side surface to the adhesive plate, and process the first side surface to obtain the first finished side surface.

[0068] Please see Figure 3 , Figure 5 By fixing the first side 110 with a light adhesive, the third side 130 is machined into a disc. A predetermined thickness is machined on the third side 130 to remove the chamfers and chipped edges between the third side 130 and the coated finished end faces 200 at both ends. The machined third side 130 is then fixed with a light adhesive, and the first side 110 is machined into a disc. A predetermined thickness is machined on the first side 110 to remove the chamfers and chipped edges between the first side 110 and the coated finished end faces 200 at both ends. Since sufficient machining allowance is left on both the first side 110 and the third side 130, the aforementioned chamfers and chipped edges can be completely removed after the part is machined to the finished size in this direction.

[0069] Step S500: Side protection components are installed on the side of the third finished product and the side of the first finished product, respectively.

[0070] Please see Figure 3 , Figure 6 In the specific process, side protective components 400 are glued to the third finished side 220 and the first finished side 210 on both sides. The side protective components 400 are glass trays. They can protect the processed first finished side 210 and third finished side 220 from damage during subsequent processing. When processing the other two sides, the side protective components 400 ensure that the parts do not chip or break at the edges without chamfering. In addition, the glued glass trays are easy to remove, improving the overall processing efficiency and turnover efficiency.

[0071] In addition, the end face protection and side protection components are used as supporting panels and mainly serve a protective function, so the thickness of the supporting panels can be relatively thin.

[0072] Step S600: Apply the polished second side to the adhesive plate, process the opposite fourth side to obtain the fourth finished side, apply the fourth finished side to the adhesive plate, and process the second side to obtain the second finished side.

[0073] Please see Figure 3 , Figure 6 In the specific process, the second side 120 is fixed with adhesive, and the fourth side 140 is processed into a disc. A predetermined thickness is processed on the fourth side 140 to remove the chamfers and chipped edges between the fourth side 140 and the coated finished end faces 200 at both ends, as well as the chamfers and chipped edges between the fourth side 140 and the first finished side 210 and the third finished side 220, respectively. After fixing the processed fourth side 140 with adhesive, the second side 120 is processed into a disc. A predetermined thickness is processed on the second side 120 to remove the chamfers and chipped edges between the second side 120 and the coated finished end faces 200 at both ends, as well as the chamfers and chipped edges between the second side 120 and the first finished side 210 and the third finished side 220, respectively. Similarly, since sufficient processing allowance is left on both the second side 120 and the fourth side 140, after the part is processed to the finished size in this direction, the aforementioned chamfers and chipped edges can be completely removed.

[0074] By using the method described in this embodiment, after ensuring the perpendicularity between adjacent sides, the end face 150 to be coated can be directly photo-coated onto the tooling. Since the side face does not need to be protected by a mounting plate during the processing of the end face 150, the influence of the mounting plate quality on the part is eliminated. After coating, the processed surface is protected by bonding the mounting plate, and the part can be directly photo-coated onto the reference surface for processing. Since the blank allowance is large, small chipping on the part can be processed, improving material utilization and reducing the risk of product scrap.

[0075] First, two adjacent sides are roughly machined, and then two end faces are machined at 150° using these as a reference. After coating, the mounting plates are glued on and the shape is machined. This not only greatly reduces the problem of scrap and breakage during coating, but also lowers the requirements for mounting plates, saves processing costs and improves processing efficiency, enabling mass production of optical guide rod products.

[0076] Step 700: Remove the end face protection from the end face of the coated finished product by heating and soaking, and remove the side protection from the side of the first finished product and the side of the third finished product respectively.

[0077] In the specific process, heating and solution immersion can be used to quickly and safely remove the adhesive. Compared with the existing process where it is difficult to remove the adhesive when the parts and the mating plate have a high degree of matching, this method can quickly remove the adhesive and complete the processing of cylindrical parts to meet the product's optical index requirements.

[0078] In summary, the processing method for an end-face coated optical guide rod provided in this application utilizes existing cold-working equipment to process the optical guide rod using an adhesive bonding method, achieving the product's optical performance requirements. By bonding ordinary glass bonding pads instead of optically bonded quartz bonding pads, the requirements for bonding pad materials, surface finish, and surface shape are eliminated, reducing material costs. The original optically bonded pad process is not suitable for mass production of parts, while this method significantly reduces operational difficulty, making mass production of parts possible. The adhesive can be removed quickly and safely, completing the processing of cylindrical parts and achieving the product's optical performance requirements.

[0079] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for processing an optical guide rod with end-face coating, characterized in that, The method comprises the steps of: providing a blank, and polishing adjacent first and second sides of the blank, wherein the right angle between the polished first and second sides is made to meet predetermined angle requirements, and the surface shape of the polished sides is made to meet predetermined polishing requirements; fixing the blank to a polishing disc based on the first and second sides, and processing two end faces of the blank to obtain finished end faces, respectively; coating the two finished end faces to form coated finished end faces, and arranging end face protectors on the coated finished end faces at both ends; polishing the first side to the polishing disc, and processing an opposite third side to obtain a third finished side, and polishing the third finished side to the polishing disc, and processing the first side to obtain a first finished side; arranging side protectors on the third finished side and the first finished side, respectively; polishing the second side to the polishing disc, and processing an opposite fourth side to obtain a fourth finished side, and polishing the fourth finished side to the polishing disc, and processing the second side to obtain a second finished side; in the step of coating the two finished end faces to form coated finished end faces, and arranging end face protectors on the coated finished end faces at both ends: adhering the end face protectors to the coated finished end faces at both ends, wherein the thickness of the adhesive layer and the adhesive angle of the end face protectors are controlled to meet predetermined requirements; in the step of arranging side protectors on the third finished side and the first finished side, respectively: adhering the side protectors to the third finished side and the first finished side at both sides, respectively.

2. The processing method of the optical guide rod with end-face coating as described in claim 1, characterized in that, in the step of providing a blank, and polishing adjacent first and second sides of the blank: a predetermined thickness of blank allowance is left on each surface of the blank.

3. The processing method of the optical guide rod with end-face coating as described in claim 2, characterized in that, in the step of fixing the blank to a polishing disc based on the first and second sides, and processing two end faces of the blank to obtain finished end faces, respectively: polishing the second side to the polishing disc based on the polished first side; adhering the polishing disc to the polishing disc, and processing two end faces of the blank to form a disc.

4. The processing method of the optical guide rod with end-face coating as described in claim 3, characterized in that, after the step of polishing the second side to the polishing disc based on the polished first side: detecting and adjusting the disc angle of the first side to ensure that the blank meets predetermined alignment requirements.

5. The processing method of the optical guide rod with end-face coating as described in claim 1, characterized in that, in the step of polishing the first side to the polishing disc, and processing an opposite third side to obtain a third finished side, and polishing the third finished side to the polishing disc, and processing the first side to obtain a first finished side: processing a predetermined thickness on the third side, and removing the chamfer and burr between the third side and the coated finished end faces at both ends; processing a predetermined thickness on the first side, and removing the chamfer and burr between the first side and the coated finished end faces at both ends.

6. The processing method of the optical guide rod with end-face coating as described in claim 5, characterized in that, In the steps of polishing the second side surface and then photo-curing the polished second side surface on a photo-curing plate, processing the opposite fourth side surface to obtain a fourth finished side surface, photo-curing the fourth finished side surface on a photo-curing plate, and processing the second side surface to obtain a second finished side surface, the method further comprises: processing the fourth side surface to a predetermined thickness, removing the chamfer and burr between the fourth side surface and the plated finished end surface at both ends, and removing the chamfer and burr between the fourth side surface and the first finished side surface and the third finished side surface, respectively; processing the second side surface to a predetermined thickness, removing the chamfer and burr between the second side surface and the plated finished end surface at both ends, and removing the chamfer and burr between the second side surface and the first finished side surface and the third finished side surface, respectively.

7. The processing method of the optical guide rod with end-face coating as described in claim 6, characterized in that, The end surface protection member and the side surface protection member are both glass plates.

8. The method of claim 1-7, wherein the method further comprises: The method further comprises, after the steps of polishing the second side surface and then photo-curing the polished second side surface on a photo-curing plate, processing the opposite fourth side surface to obtain a fourth finished side surface, photo-curing the fourth finished side surface on a photo-curing plate, and processing the second side surface to obtain a second finished side surface: removing the end surface protection member from the plated finished end surface and the side surface protection member from the first finished side surface and the third finished side surface, respectively, by heating and soaking.

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