A machining process for a right-angle roof prism tower difference 1'

Abstract

This invention discloses a processing technology for reducing the tower aberration 1′ of a right-angle roof prism, comprising the following steps: first, rough machining the blank of the right-angle roof prism; then, using a first positioning fixture 1, applying a light adhesive to the right-angle roof prism onto a 90° square brick support, and machining the two right-angle faces of the right-angle roof prism; then, using a second positioning fixture 2, applying a light adhesive to the right-angle roof prism onto a 45° support, and machining the two ridge faces of the right-angle roof prism; then, applying a light adhesive to the right-angle roof prism onto a glass pad and machining the two side faces; finally, finishing machining the two ridge faces of the right-angle roof prism, ultimately obtaining a tower aberration within ±1′ and a double aberration within ±10″ of the product.

Description

Technical Field

[0001] This invention relates to the field of optical prism processing technology, specifically to a processing technology for a right-angle roof prism tower difference 1′. Background Technology

[0002] A prism is a prism made of optical materials. All the refractive and reflective surfaces of a prism are collectively called working surfaces, the line of intersection of two working surfaces is called an edge, and the cross section perpendicular to the edge is called the principal section. Prisms play many different roles in optics, and combinations of prisms can be used as beam splitters, polarizers, etc.

[0003] Prisms require high precision not only in the surface finish of their working surfaces but also in the angular accuracy between them. These two aspects directly determine the quality of the prism. Currently, prisms are generally produced in batches. Ensuring that the parameters of each working surface (smoothness, flatness, angles, etc.) meet the design precision requirements is a core issue that every process technology solution must address. This is because every step in the manufacturing process can affect the final product's precision. Therefore, controlling machining accuracy is crucial throughout the entire manufacturing process, and solutions must be found for the influencing factors of each step.

[0004] There are generally two methods for controlling the angle accuracy of existing roof prisms in optical processing:

[0005] Method 1 involves using fixtures such as cuboids, 90° cuboids, and polishing pads on a polishing machine to assemble a mirror disk, and then grinding and polishing by controlling the parallelism. However, this method cannot precisely control the technical requirements of the ridge prism during processing (ridge angle ≥ 1″ and tower difference ≥ 1').

[0006] Method 2: Using the method of processing cubes, the blank is first processed into a cube blank. After passing the inspection, the cube blank is then cut into the shape of a roof prism using a precision cutting machine. Finally, one side of the roof prism is processed. During the cutting process, defects are easily caused to the already qualified working surface, affecting the quality of the parts. Furthermore, it is impossible to accurately control the accuracy of the ridge difference ≥ 1'.

[0007] Both of these processing methods suffer from large tower difference errors, making them unsuitable for processing high-precision calibration prisms. Summary of the Invention

[0008] The purpose of this invention is to provide a processing technology for a right-angle roof prism tower with a difference of 1′, so as to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: first, the blank of the right-angle ridge prism is rough-machined, and then the first positioning fixture 1 is used to apply the right-angle ridge prism to the 90° square brick support body, and the two right-angled surfaces of the right-angle ridge prism are machined.

[0010] Then, using the second positioning fixture 2, the right-angle ridge prism is applied to the 45° body with optical adhesive. First, the two ridge surfaces of the right-angle ridge prism are processed, and then one of the ridge surfaces is finely processed.

[0011] Next, apply the adhesive to the glass backing plate to process two sides of the right-angle roof prism.

[0012] Then, the other ridge surface of the right-angle ridge prism is precisely machined using a 90° rectangular brick support.

[0013] This ensures that the tower difference of the product is within ±1′ and the double aberration is within ±10″.

[0014] Preferably, the rough machining process for the blank of the right-angle roof prism is as follows:

[0015] S1: According to the drawing requirements, rough grinding is performed to form a blank with a machining allowance of 0.4mm on each side;

[0016] S2: Use any side as the upper plate surface, apply 417 glue to the glass pad, process according to the process dimensions, and polish directly to the lower plate. The surface finish should be -0.2λ, and the surface should be free of sand holes.

[0017] S3: Seal the polished side surface onto the glass backing plate with 417 glue. A coarse aperture should be visible. Process according to the process dimensions. The parallelism error should be less than 0.002 mm within the φ300 mm range, and the surface profile error should be 0.001 mm within the φ300 mm range. High polishing is performed directly on the bottom plate. The surface aperture is -0.2λ, and there are no sand holes on the surface.

[0018] Preferably, the processing technology for the two right-angled faces of the right-angled roof prism is as follows:

[0019] S1: Using any side as the upper plate, use the first positioning fixture to apply the right-angle roof prism light adhesive to the 90° square brick backing body, bake for 4 hours, and after cooling, apply protective adhesive. Apply the 90° backing body light adhesive to the glass pad and process a certain right-angle surface.

[0020] S2: The sanding process is carried out according to the process dimensions. The parallelism is controlled within φ300mm with an error of less than 0.002mm, and the surface shape is controlled within φ300mm with an error of 0.001mm.

[0021] S3: During polishing, the parallelism is controlled within 0.002 mm within the φ300 mm range. It is tested with a plane interferometer. The aperture and surface finish are processed according to the drawing requirements.

[0022] S4: Flip the square brick backing and process the other right-angled surface using the same method.

[0023] Preferably, the processing technology for the two ridge surfaces of the right-angle ridge prism, and the finishing technology for one of the ridge surfaces, are as follows:

[0024] S1: Using any side as the upper plate surface, use the second positioning fixture to apply the right-angle ridge prism to the chord surface of the 45° body. When applying the prism, ensure that the two finished right-angle surfaces and the reference surface of the second positioning fixture are aligned with the coarse aperture. Then apply the protective glue and apply the body to the glass pad to process the first ridge surface.

[0025] S2: The frosted finish is processed according to the process dimensions. The parallelism error is less than 0.002 mm within the φ300 mm range, and the surface shape error is 0.001 mm within the φ300 mm range. The high-polish finish is directly applied to the bottom plate.

[0026] S3: Using the same method, process the second ridge surface. First, sand it, then polish it, and finally fine polish it. During fine polishing, use a plane interferometer to check the parallelism. Within the φ300mm range, it should be 0.001mm. The surface finish and smoothness should be processed according to the drawing requirements.

[0027] Preferably, the processing technology for the two sides of the right-angle roof prism is as follows:

[0028] S1: Using any side as the upper plate surface, seal the other side on the glass pad with 417 glue. When frosting, the parallelism error should be less than 0.005 mm within the φ300 mm range, and the surface roughness should be -0.003 mm within the φ300 mm range. The dimensions should be processed according to the process requirements, and the surface roughness should be processed according to the drawing requirements.

[0029] S2: Process the other side using the same process, with dimensions and surface roughness as required by the drawing.

[0030] Preferably, the process for finishing the other ridge surface of the right-angle ridge prism is as follows:

[0031] S1: Apply the polished ridge surface gloss adhesive to the 90° rectangular brick backing. When positioning the ridge surface to be processed, be sure to see the halo stripes. Bake for 4 hours, cool, apply protective adhesive, then apply the 90° rectangular brick backing gloss adhesive to the glass pad and finish this ridge surface to be processed.

[0032] S2: During sanding, process according to the process dimensions. The parallelism error is less than 0.001 mm within the φ300 mm range, and the surface profile error is 0.001 mm within the φ300 mm range;

[0033] S3: First high-level polishing, then fine polishing; use a plane interferometer to check the parallelism, with an error of less than 0.001 mm within the φ300 mm range, ensuring that the double aberration is less than ±10″ and the eccentricity is less than ±1′, and the surface aperture and finish are processed according to the drawing requirements;

[0034] S4: Chamfer the bottom edge, clean, and inspect.

[0035] Preferably, the first positioning fixture 1 includes a first base plate 11, a first rectangular template 12 is fixed on the first base plate 11, an L-shaped template 13 is fixed on the side of the first rectangular template 12, the 90° square brick support 14 is installed on the L-shaped template 13, and the two sides of the 90° square brick support 14 can simultaneously smooth the blanks of two right-angle roof prisms.

[0036] Preferably, the second positioning fixture 2 includes a second base plate 21, on which two positioning templates 22 are fixed. The two positioning templates 22 are arranged opposite to each other on the second base plate 21, and their right-angled surfaces are in contact with the second base plate 21. The inclined surfaces of the two templates form a V-shaped positioning groove 23. A support block 24 is fixed next to one of the positioning templates 22, and a ridge surface positioning module 25 is installed on the support block 24.

[0037] The ridge surface positioning module 25 includes a second rectangular template 251 and a 45° template 252. The end of the second rectangular template 251 is fixed to the support block 24 and is designed to be inclined. The right-angled surface of the 45° template 252 is fixed to the side of the second rectangular template 251. A right-angled positioning groove 26 is formed between the second rectangular template 251 and the 45° template 252.

[0038] Compared with the prior art, the beneficial effects of the present invention are:

[0039] By utilizing the combination of a dedicated first positioning fixture and a 90° square brick support, and the combination of a second positioning fixture and a 45° support, the processing technology of right-angled surfaces and ridge surfaces is simplified. This not only facilitates operation but also results in a high yield rate and a high pass rate, effectively improving production efficiency and output.

[0040] By using commonly used 45° and 90° square brick supports to process the ridge surface, it is possible not only to achieve a tower difference within ±1′ and a double aberration within ±10″, but also to ensure the symmetry of the ridge prism within ±0.05 mm. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the structure of the first positioning fixture of the present invention;

[0042] Figure 2 This is a schematic diagram of the structure of the 90° square brick support body of the present invention installed on the first positioning fixture;

[0043] Figure 3 This is a schematic diagram of the structure of the optical adhesive right-angle roof prism using the first positioning fixture of the present invention;

[0044] Figure 4This is a schematic diagram of the structure of the right-angle roof ridge prism optical adhesive applied to a 90° square brick support body according to the present invention.

[0045] Figure 5 This is a schematic diagram of the structure of the second positioning tool of the present invention;

[0046] Figure 6 This is a schematic diagram of the structure of the second positioning tool of the present invention;

[0047] Figure 7 This is a schematic diagram of the structure of the optical adhesive right-angle roof prism using the second positioning fixture of the present invention;

[0048] Figure 8 This is a schematic diagram of the structure of the right-angle roof ridge prism light adhesive applied to a 45° support body according to the present invention;

[0049] Figure 9 This is a schematic diagram of the structure during the processing of the ridge surface of the right-angle ridge prism according to the present invention;

[0050] Figure 10 This is a schematic diagram of the structure when processing the other ridge surface of the right-angle ridge prism of the present invention;

[0051] Figure 11 This is a schematic diagram of the structure of the polished ridge surface adhesive of the present invention on the side of a 90° rectangular brick support.

[0052] Figure 12 This is a schematic diagram of the right-angle roof ridge prism structure completed according to the present invention. Detailed Implementation

[0053] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] In the description of the invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0055] In the description of the invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the invention based on the specific circumstances.

[0056] Please see Figure 1-12 This invention provides a technical solution: a processing technology for a right-angle roof prism with a 1′ difference, firstly, the blank of the right-angle roof prism is rough-processed as follows:

[0057] S1: According to the drawing requirements, rough grinding is performed to form a blank with a machining allowance of 0.4mm on each side;

[0058] S2: Use any side as the upper plate surface, apply 417 glue to the glass pad, process according to the process dimensions, and polish directly to the lower plate. The surface finish should be -0.2λ, and the surface should be free of sand holes.

[0059] S3: Seal the polished side surface onto the glass backing plate with 417 glue. A coarse aperture should be visible. Process according to the process dimensions. The parallelism error should be less than 0.002 mm within the φ300 mm range, and the surface profile error should be 0.001 mm within the φ300 mm range. High polishing is performed directly on the bottom plate. The surface aperture is -0.2λ, and there are no sand holes on the surface.

[0060] Utilize Figure 1 The first positioning fixture 1 shown applies a smooth adhesive to the blank of the right-angle ridge prism onto the 90° square brick support to process the two right-angled faces of the right-angle ridge prism.

[0061] On each 90° square brick support, two right-angled roof prism blanks can be gloss-coated, such as... Figure 3 As shown,

[0062] Then, as Figure 4 The 90° square brick support shown is glued to the glass pad, so that 40-50 pieces can be processed on the surface of the glass pad at the same time. The processing is simple and the success rate is high.

[0063] The specific processing techniques for the two right-angled surfaces mentioned above are as follows:

[0064] S1: Using any side as the upper plate, use the first positioning fixture to apply the right-angle roof prism light adhesive to the 90° square brick backing body, bake for 4 hours, and after cooling, apply protective adhesive. Apply the 90° backing body light adhesive to the glass pad and process a certain right-angle surface.

[0065] S2: The sanding process is carried out according to the process dimensions. The parallelism is controlled within φ300mm with an error of less than 0.002mm, and the surface shape is controlled within φ300mm with an error of 0.001mm.

[0066] S3: During polishing, the parallelism is controlled within 0.002 mm within the φ300 mm range. It is tested with a plane interferometer. The aperture and surface finish are processed according to the drawing requirements.

[0067] S4: Flip the square brick backing and process the other right-angled surface using the same method.

[0068] Reuse, such as Figure 5 , Figure 6 The second positioning fixture 2 shown applies the optical adhesive to the right-angle roof prism on the 45° support body.

[0069] Then, as Figure 8 The 45° right-angled surface of the prism shown is applied to a glass plate. First, the two ridge surfaces of the right-angled ridge prism are processed, and then one of the ridge surfaces is finely processed. The specific process is as follows:

[0070] S1: Using any side as the upper plate surface, apply adhesive to the right-angle roof prism on the chord surface of the 45° support using the second positioning fixture. During adhesive application, ensure that the two finished right-angle surfaces align with the reference surface of the second positioning fixture. Then apply a protective adhesive, and finally apply adhesive to the support onto the glass pad. Process as follows: Figure 9 The first ridge surface shown;

[0071] S2: The frosted finish is processed according to the process dimensions. The parallelism error is less than 0.002 mm within the φ300 mm range, and the surface shape error is 0.001 mm within the φ300 mm range. The high-polish finish is directly applied to the bottom plate.

[0072] S3: Use the same method to load the plate, and process as follows: Figure 10 The second ridge surface shown is first sanded, then polished, and finally finely polished. During fine polishing, a plane interferometer is used to check the parallelism, which is 0.001 mm within the φ300 mm range. The surface finish and smoothness are processed according to the drawing requirements.

[0073] Next, apply the adhesive to the right-angle roof prism and process the two sides onto the glass backing. The specific processing steps for the two sides are as follows:

[0074] S1: Using any side as the upper plate surface, seal the other side on the glass pad with 417 glue. When frosting, the parallelism error should be less than 0.005 mm within the φ300 mm range, and the surface roughness should be -0.003 mm within the φ300 mm range. The dimensions should be processed according to the process requirements, and the surface roughness should be processed according to the drawing requirements.

[0075] S2: Process the other side using the same process, with dimensions and surface roughness as required by the drawing.

[0076] The other ridge surface of the right-angle ridge prism is then precisely machined using a 90° rectangular brick support. The specific process is as follows:

[0077] S1: Apply the polished roof ridge finish sealant to the side of the 90° rectangular brick support as follows: Figure 11 As shown, at least four right-angled ridge prisms can be applied to each 90° rectangular brick support.

[0078] During the gloss lamination process, when positioning the ridge surface to be processed, it is essential to see the halo stripes.

[0079] After applying the gloss adhesive, bake for another 4 hours. After cooling, apply a protective adhesive and then apply the gloss adhesive to the 90° rectangular brick backing onto the glass pad. Finally, finish the ridge surface to be processed.

[0080] S2: During sanding, process according to the process dimensions; the parallelism error is less than 0.001 mm within the range of φ300 mm, and the surface shape error is 0.001 mm within the range of φ300 mm;

[0081] S3: First, perform high-level polishing, then fine polishing. Use a plane interferometer to check the parallelism. Within the φ300mm range, the error should be less than 0.001mm. Ensure that the double aberration is less than ±10″ and the eccentricity is less than ±1′. The surface aperture and smoothness should be processed according to the drawing requirements.

[0082] S4: After chamfering, cleaning, and inspection of the lower plate, a high-precision right-angle ridge prism with a tower difference within ±1′ and a double aberration within ±10″ can be obtained. Figure 12 As shown.

[0083] In this embodiment, the first positioning fixture 1 includes a first base plate 11, a first rectangular template 12 is fixed on the first base plate 11, an L-shaped template 13 is fixed on the side of the first rectangular template 12, the 90° square brick support is installed on the L-shaped template 13, and the blanks of two right-angle roof prisms can be simultaneously coated on both sides of the 90° square brick support.

[0084] The steps for applying the blank of the right-angle roof prism to the 90° square brick support using the first positioning fixture 1 are as follows: First, fix the 90° square brick support onto the L-shaped template 13. Figure 2 As shown, then take the blanks of two right-angled roof prisms and apply gloss adhesive to both sides of the 90° square brick body, as shown. Figure 3 As shown, during the gluing process, it is necessary to ensure that the two right-angled faces of the right-angled ridge prism correspond to the first rectangular template 12 and the first substrate respectively, and that its side surface is in contact with the side surface of the 90° square brick body. Glue can be applied to the side surface to glu it to the 90° square brick body.

[0085] In this embodiment, the structure of the second positioning fixture 2 is as follows: Figure 5 , Figure 6As shown, it includes a second substrate 21, on which two positioning templates 22 are fixed. The two positioning templates 22 are arranged opposite to each other on the second substrate 21, and their right-angled surfaces are in contact with the second substrate 21. The inclined surfaces of the two form a V-shaped positioning groove 23. A support block 24 is fixed next to one of the positioning templates 22, and a ridge surface positioning module 25 is installed on the support block 24.

[0086] The ridge surface positioning module 25 includes a second rectangular template 251 and a 45° template 252. The end of the second rectangular template 251 is fixed to the support block 24 and is designed to be inclined. The right angle surface of the 45° template 252 is fixed to the side of the second rectangular template 251. A right angle positioning groove 26 is formed between the second rectangular template 251 and the 45° template 252.

[0087] The steps for using the second positioning fixture 2 to position the right-angle roof prism adhesive at a 45° angle to the body are as follows: Figure 7 As shown, first place the 45° support body into the V-shaped positioning groove 23, so that its chord surface is in contact with the bottom surface of the ridge surface positioning module 25. Then, the right angle of the right-angle ridge prism is correspondingly clipped into the right-angle positioning groove 26, and its side is in contact with the chord surface of the 45° support body. During the positioning, it is necessary to ensure that the two finished right-angle surfaces and the reference surface of the ridge surface positioning module 25 are aligned with the coarse aperture. Then, the side of the right-angle ridge prism can be glued to the chord surface of the 45° support body.

[0088] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0089] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A processing technology for a right-angled roof prism tower with a 1′ difference, characterized in that, Includes the following steps: First, the blank of the right-angle ridge prism is rough processed, and then the first positioning fixture (1) is used to apply the right-angle ridge prism to the 90° square brick body and process the two right-angle surfaces of the right-angle ridge prism. Then, using the second positioning fixture (2), the right-angle ridge prism is applied to the 45° body, and the two ridge surfaces of the right-angle ridge prism are first processed, and one of the ridge surfaces is then finely processed. Next, apply the adhesive to the glass backing plate to process two sides of the right-angle roof prism. Then, the other ridge surface of the right-angle ridge prism is precisely machined using a 90° rectangular brick support. This ensures that the tower difference of the obtained product is within ±1′ and the double aberration is within ±10″. The rough machining process for the blank of the right-angle roof prism is as follows: S1: According to the drawing requirements, rough grinding is performed to form a blank with a machining allowance of 0.4mm on each side; S2: Use any side as the upper plate surface, apply 417 glue to the glass pad, process according to the process dimensions, and polish directly to the lower plate. The surface finish should be -0.2λ, and the surface should be free of sand holes. S3: Seal the polished side with 417 glue onto the glass pad. A coarse aperture should be visible. Process according to the process dimensions. The parallelism error should be less than 0.001 mm within the φ300 mm range. The surface shape error should be 0.001 mm within the φ300 mm range. High polishing is done directly on the plate. The surface aperture is -0.2λ. There are no sand holes on the surface. The processing technology for the two sides of the right-angle roof prism is as follows: S1: Using any side as the upper plate surface, seal the other side on the glass pad with 417 glue. When frosting, the parallelism error should be less than 0.005 mm within the φ300 mm range, and the surface roughness should be -0.003 mm within the φ300 mm range. The dimensions should be processed according to the process requirements, and the surface roughness should be processed according to the drawing requirements. S2: Process the other side using the same process, with dimensions and surface finish as required by the drawing; The first positioning fixture (1) includes a first base plate (11), a first rectangular template (12) is fixed on the first base plate (11), an L-shaped template (13) is fixed on the side of the first rectangular template (12), the 90° square brick support is installed on the L-shaped template (13), and the two sides of the 90° square brick support can simultaneously smooth the blanks of two right-angle roof prisms. The second positioning fixture (2) includes a second base plate (21), on which two positioning templates (22) are fixed. The two positioning templates (22) are arranged opposite to each other on the second base plate (21), and their right-angled surfaces are in contact with the second base plate (21). The inclined surfaces of the two form a V-shaped positioning groove (23). A support block (24) is fixed next to one of the positioning templates (22), and a ridge surface positioning module (25) is installed on the support block (24). The ridge surface positioning module (25) includes a second rectangular template (251) and a 45° template (252). The end of the second rectangular template (251) is fixed to the support block (24) and is designed in an inclined shape. The right angle of the 45° template (252) is fixed to the side of the second rectangular template (251). A right angle positioning groove (26) is formed between the second rectangular template (251) and the 45° template (252).

2. The processing technology for a right-angle roof prism tower with a difference of 1′ according to claim 1, characterized in that, The processing technology for the two right-angled faces of the right-angled roof prism is as follows: S1: Using any side as the upper plate, use the first positioning fixture to apply the right-angle roof prism light adhesive to the 90° square brick backing body, bake for 4 hours, and after cooling, apply protective adhesive. Apply the 90° backing body light adhesive to the glass pad and process a certain right-angle surface. S2: The sanding process is carried out according to the process dimensions. The parallelism is controlled within φ300mm with an error of less than 0.002mm, and the surface shape is controlled within φ300mm with an error of 0.001mm. S3: During polishing, the parallelism is controlled within 0.002 mm within the φ300 mm range. It is tested with a plane interferometer. The aperture and surface finish are processed according to the drawing requirements. S4: Flip the square brick backing and process the other right-angled surface using the same method.

3. The processing technology for a right-angle roof prism tower with a difference of 1′ according to claim 1, characterized in that, The processing technology for the two ridge surfaces of the right-angle ridge prism, and the finishing technology for one of the ridge surfaces, are as follows: S1: Using any side as the upper plate surface, use the second positioning fixture to apply the right-angle ridge prism to the chord surface of the 45° body. When applying the prism, ensure that the two finished right-angle surfaces and the reference surface of the second positioning fixture are aligned with the coarse aperture. Then apply the protective glue and apply the body to the glass pad to process the first ridge surface. S2: The frosted finish is processed according to the process dimensions. The parallelism error is less than 0.002 mm within the φ300 mm range, and the surface shape error is 0.001 mm within the φ300 mm range. The high-polish finish is directly applied to the bottom plate. S3: Using the same method, process the second ridge surface. First, sand it, then polish it, and finally fine polish it. During fine polishing, use a plane interferometer to check the parallelism. Within the φ300mm range, it should be 0.001mm. The surface finish and smoothness should be processed according to the drawing requirements.

4. The processing technology for a right-angle roof prism tower with a difference of 1′ according to claim 3, characterized in that, The process for precision machining the other ridge surface of the right-angle ridge prism is as follows: S1: Apply the polished ridge surface gloss adhesive to the 90° rectangular brick backing. When positioning the ridge surface to be processed, make sure to see the halo stripes. Bake for 4 hours, cool, apply protective adhesive, then apply the 90° rectangular brick backing gloss adhesive to the glass pad, and then perform fine processing on this ridge surface to be processed. S2: During sanding, process according to the process dimensions; the parallelism error is less than 0.001 mm within the range of φ300 mm, and the surface shape error is 0.001 mm within the range of φ300 mm; S3: First high-level polishing, then fine polishing; use a plane interferometer to check the parallelism, with an error of less than 0.001 mm within the φ300 mm range, ensuring that the double aberration is less than ±10″ and the eccentricity is less than ±1′, and the surface aperture and finish are processed according to the drawing requirements; S4: Chamfer the bottom edge, clean, and inspect.

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