Porro prism processing method

Abstract

The invention relates to the technical field of Porro prism processing, and provides a Porro prism processing method, which comprises the following steps of: carrying out disc grinding and polishing on a first side surface and a second side surface of a blank, so that the surface shapes of the first side surface and the second side surface reach a first surface shape reference and are parallel; cylindrical angles among the first side surface, the second side surface and the bottom surface of the lower plate are chamfered; processing the bottom surface and the top surface; optical cement is conducted on the bottom face on a first tool, optical cement is conducted on the first side wall of the first tool to an optical cement disc, a cylindrical surface angle between the first side face and the top face is milled and ground, and a first ridge face is formed; optical cement is conducted on the second side wall of the first tool to the optical cement disc, the cylindrical surface angle between the second side face and the top face is milled and ground, and a second roof ridge face is formed; the roof ridge is chamfered; and finishing and polishing the first ridge surface and the second ridge surface. According to the method, the ridge edge can be chamfered while the ridge surface is machined, and the product precision is improved while the product design requirement is met.

Description

Technical Field

[0001] The present application relates to the technical field of Porro prism processing, and more specifically, to a method for processing a Porro prism. Background Art

[0002] Porro prism is a commonly used optical element, mainly used to change the direction of light path in optical systems, and is widely used in electronic products, optical instruments and other fields. After the light enters the prism, it is reflected once or multiple times and finally changes direction to emit at an angle of 90 degrees or 180 degrees.

[0003] As customers' requirements for the accuracy of Porro prism products increase, the deviation of the ridge edge is required to be within the set accuracy range, and the ridge edge needs to be chamfered and not broken. The traditional processing method of Porro prism cannot meet the current product's accuracy requirements for ridge edge chamfering and broken edges, and new processes need to be developed to meet the requirements for ridge edge chamfering and broken edges.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the invention

[0005] The purpose of the present application is to propose a method for processing a porro prism to solve the technical problem that the prior art cannot meet the product's precision requirements for chamfering and edge collapse of the ridge edge.

[0006] To achieve the above purpose, the technical solution adopted in this application is: to provide a method for processing a Porro prism, comprising:

[0007] The blank is a cuboid, comprising a top surface, a bottom surface, and a first side surface and a second side surface opposite to each other. The method comprises the following steps:

[0008] Processing the first side surface and the second side surface of the blank so that the surface shapes of the first side surface and the second side surface reach the first surface shape reference and are parallel;

[0009] The lower plate is inverted to obtain a part by calculating the cylindrical angles between the first side surface, the second side surface and the bottom surface;

[0010] Processing the bottom surface and the top surface of the part so that the top surface and the bottom surface are parallel and reach a preset size;

[0011] Apply the bottom surface polish glue of the part on a first tooling, wherein the first tooling includes a first side wall, a second side wall, a third side wall and a fourth side wall which are perpendicular to each other, a first inclined surface is provided between the third side wall and the fourth side wall, and the first inclined surface forms an angle of 45° with the third side wall and the fourth side wall respectively, wherein the bottom surface polish glue is in the middle of the first inclined surface;

[0012] Polish the first side wall of the first tooling to the polishing plate, mill the cylindrical angle between the first side surface and the top surface to form a first ridge surface parallel to the first side wall; Polish the second side wall of the first tooling to the polishing plate, mill the cylindrical angle between the second side surface and the top surface to form a second ridge surface parallel to the second side wall, and form a ridge edge between the first ridge surface and the second ridge surface;

[0013] Chamfer the roof ridge;

[0014] The first ridge surface and the second ridge surface are finely polished.

[0015] Further, the first side surface and the second side surface of the blank are processed so that the surface shapes of the first side surface and the second side surface reach the first surface shape reference and are parallel. The specific steps include:

[0016] Roll the bottom surface onto a cuboid so that the first side surface is parallel to and higher than the side surface of the cuboid, and grind and polish the first side surface;

[0017] Put the first side on the photoresist plate.

[0018] The second side surface is frosted and polished.

[0019] Furthermore, the bottom surface and the top surface of the part are processed so that the top surface and the bottom surface are parallel and reach a preset size. The specific steps include:

[0020] Put the first side surface onto the cuboid so that the bottom surface is parallel to and higher than the side surface of the cuboid, and grind and polish the bottom surface;

[0021] The bottom surface is laminated on a laminate plate, and the top surface is sanded and polished.

[0022] In some embodiments, the bottom surface of the part is coated with a light glue on the first tool, and the specific steps include:

[0023] Providing a second tool, the second tool comprising a platform, a vertical support body, a V-groove tool and a baffle, wherein the V-groove tool is provided with a V-groove with an opening angle of 90°;

[0024] The vertical support body is arranged on the platform, and the side surface of the V-groove tooling is stopped against the vertical support body, so that the V-groove opening of the V-groove tooling faces upward;

[0025] Abutting the first side wall and the second side wall of the first tool against the V-shaped groove;

[0026] The baffle is glued to the side of the vertical support body so that the baffle is away from the side of the vertical support body and is perpendicular to the first inclined surface;

[0027] The first side surface is pressed against the baffle plate so that the bottom surface of the blank is coated with polish at the middle position of the first inclined surface.

[0028] Further, the first side surface of the blank is pressed against the baffle so that the bottom surface of the blank is at the middle position of the first inclined surface. The specific steps include:

[0029] After the part is polished on the first inclined surface, the interference fringes on the platform are observed from directly above the part. When the interference fringes are evenly distributed on both sides of the V-shaped groove, the part is polished on the middle position of the first inclined surface;

[0030] The first side surfaces of the plurality of parts are sequentially spaced with photo glue to the baffle, so that the plurality of parts are all located in the middle of the first inclined surface.

[0031] In some embodiments, the second tooling further includes a pad, and when the first side wall and the second side wall of the first tooling are stopped in the V-shaped groove, the pad is further included: setting the pad on one side wall of the V-shaped groove so that the pad is supported between the V-shaped groove and the first side wall or the second side wall to adjust the position of the second tooling in the V-shaped groove.

[0032] Further, the first side wall of the first tool is laminated to the laminate disc, and the cylindrical angle between the first side surface and the top surface is milled to form a first ridge surface parallel to the first side wall. The specific steps include:

[0033] Apply glue to the first side wall to the glue plate to reinforce it;

[0034] Removing a preset dimension by polishing a cylindrical angle between the first side surface and the top surface at a low speed;

[0035] Tap the lower plate.

[0036] In some embodiments, the second side wall of the first tool is laminated to the laminate disc, and the cylindrical angle between the second side surface and the top surface is milled to form a second ridge surface parallel to the second side wall. The specific steps include:

[0037] Turn over the first tooling, glue the second side wall to the glue plate, and apply glue to reinforce it;

[0038] Removing a preset size by polishing the cylindrical angle between the second side surface and the top surface at a low speed;

[0039] Tap the lower plate.

[0040] Further, the blank is removed and the ridge edge is chamfered. The specific steps include:

[0041] The ridge edge is chamfered to a preset width and a preset angle.

[0042] In some embodiments, the first ridge surface and the second ridge surface are finely polished, and the specific steps include:

[0043] Check the width of the ridge edge. If the width exceeds the threshold value a, first gluing the first ridge surface of the ridge edge to the rectangular parallelepiped, fine-tuning the second ridge surface, then gluing the second ridge surface of the ridge edge to the rectangular parallelepiped, and fine-tuning the first ridge surface. The size removed during fine-tuning of the first ridge surface is a / 2.

[0044] The beneficial effects of the processing method of the Porro prism provided in the present application are at least that: when processing the blank, the method first processes the first side surface, the second side surface, the top surface and the bottom surface of the blank, corrects its surface shape and lateral verticality, and finally removes the ridge, thereby ensuring the processing accuracy of each surface; at the same time, the parts are positioned based on the first tooling, which can improve the accuracy of processing the ridge surface and reduce the processing difficulty. At the same time, the ridge edge can be chamfered to meet the product design requirements and satisfy the product accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0046] Figure 1 A flowchart of a method for processing a Porro prism provided in an embodiment of the present application;

[0047] Figure 2 A schematic diagram of the structure of a blank provided in an embodiment of the present application;

[0048] Figure 3 A schematic diagram of the structure of a finished Porro prism provided in an embodiment of the present application;

[0049] Figure 4 A schematic diagram of the structure of the blank optical adhesive provided in the embodiment of the present application on the first tooling;

[0050] Figure 5 A schematic diagram of the structure of the first tooling and the second tooling provided in an embodiment of the present application when they are engaged and clamped together.

[0051] Among them, the reference numerals in the figure are:

[0052] 1. blank; 11. top surface; 12. bottom surface; 13. first side surface; 14. second side surface;

[0053] 2. first tooling; 21. first side wall; 22. second side wall; 23. third side wall; 24. fourth side wall; 25. first inclined surface;

[0054] 3. The first ridge surface;

[0055] 4. Second roof ridge surface;

[0056] 5. Platform;

[0057] 6. Vertically lean against the body;

[0058] 7. V-groove tooling;

[0059] 8. Baffle;

[0060] 9. Pad. DETAILED DESCRIPTION

[0061] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0062] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly or indirectly located on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on the present technical solution. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0063] The following describes the processing method of the Porro prism according to the embodiment of the present application in conjunction with the accompanying drawings.

[0064] See also Figure 1 , Figure 1 A flow chart showing a method for processing a Porro prism according to the present application.

[0065] Among them, the blank 1 is processed during processing, see Figure 2The blank 1 is a rectangular parallelepiped, including a top surface 11, a bottom surface 12, and opposite first and second side surfaces 13 and 14. At the same time, the first tooling 2 is used in the processing process. The first tooling 2 includes a first side wall 21, a second side wall 22, a third side wall 23, and a fourth side wall 24 that are perpendicular to each other. A first inclined surface 25 is provided between the third side wall 23 and the fourth side wall 24. The first inclined surface 25 forms an angle of 45° with the third side wall 23 and the fourth side wall 24, respectively. That is, the first inclined surface 25 forms an angle of 45° with the third side wall 23 and also forms an angle of 45° with the fourth side wall 24.

[0066] The processing method of the Porro prism provided in the present application aims to achieve the precision requirements of the chamfering and edge collapse of the ridge edge and meet the product precision requirements, and specifically comprises the following steps:

[0067] S100: processing the first side surface 13 and the second side surface 14 of the blank 1, the processing including mounting, grinding and polishing, so that the surface shapes of the first side surface 13 and the second side surface 14 reach the first surface shape reference and are parallel;

[0068] S200: The lower plate is chamfered to obtain a cylindrical angle between the first side surface 13, the second side surface 14 and the bottom surface 12, wherein the finished cylindrical angle is 0.1+0.1×45°, 0.1 represents the chamfer width, which is 0.1 mm, 0.1×45° represents the chamfer angle is 45 degrees, the chamfer hypotenuse length is 0.1 mm, and the rest is not chamfered;

[0069] S300: Processing the bottom surface 12 and the top surface 11 of the part, including mounting, grinding and polishing, so that the top surface 11 and the bottom surface 12 are parallel and reach a preset size;

[0070] S400: Apply gloss glue 12 to the bottom surface of the part on the first tooling 2, see Figure 4 The first tooling 2 includes a first side wall 21, a second side wall 22, a third side wall 23 and a fourth side wall 24 which are perpendicular to each other. A first inclined surface 25 is provided between the third side wall 23 and the fourth side wall 24. The angles between the first inclined surface 25 and the third side wall 23 and the fourth side wall 24 are all 45°. The optical glue on the bottom surface 12 is located in the middle of the first inclined surface 25.

[0071] S500: The first side wall 21 of the first tool 2 is laminated to the laminate disc, and the cylindrical angle between the first side surface 13 and the top surface 11 is milled to form a first ridge surface 3 parallel to the first side wall 21; The second side wall 22 of the first tool 2 is laminated to the laminate disc, and the cylindrical angle between the second side surface 14 and the top surface 11 is milled to form a second ridge surface 4 parallel to the second side wall 22, and a ridge ridge is formed between the first ridge surface 3 and the second ridge surface 4;

[0072] S600: Chamfer the roof ridge;

[0073] S700: The first roof surface 3 and the second roof surface 4 are finely polished to form a Porro prism, see Figure 3 The finished Porro prism.

[0074] When processing the blank 1, the method first processes the first side surface 13, the second side surface 14, the top surface 11 and the bottom surface 12 of the blank 1, corrects its surface shape and lateral verticality, and finally removes the ridge, thereby ensuring the processing accuracy of each surface; at the same time, based on the first tooling 2, the parts are positioned, which can improve the accuracy of processing the ridge surface and reduce the processing difficulty. At the same time, the ridge edge can be chamfered to meet the product design requirements and the product accuracy.

[0075] In some embodiments, the first side surface 13 and the second side surface 14 of the blank 1 are processed so that the surface shapes of the first side surface 13 and the second side surface 14 reach the first surface shape reference and are parallel. The specific steps include:

[0076] The bottom surface 12 of the blank 1 is mounted on the cuboid so that the first side surface 13 is parallel to and higher than the side surface of the cuboid, and the first side surface 13 is ground and polished;

[0077] Put the blank 1 on the plate and glue the first side surface 13 onto the glue plate, and seal the first side surface 13 with the glass plate at 502;

[0078] The second side surface 14 is sanded and polished. For example, 0.05-0.15 is sanded and removed, and the plate Δt is controlled to be ≤ 0.005. After sanding and polishing, the plate is knocked or soaked in acetone and cleaned once.

[0079] Further, the bottom surface 12 and the top surface 11 of the blank 1 are subjected to upper plate grinding and polishing, so that the top surface 11 and the bottom surface 12 are parallel and reach a preset size. The specific steps include:

[0080] The first side surface 13 of the blank 1 is mounted on the cuboid so that the bottom surface 12 is parallel to and higher than the side surface of the cuboid, and the bottom surface 12 is ground and polished;

[0081] Put the blank 1 on the plate and glue the bottom surface 12 on the glue plate, and grind and polish the top surface 11.

[0082] This step is the same as the processing method of the first side surface 13 and the second side surface 14 described above. For example, grinding is performed to remove 0.03-0.15, and the disc Δt≤0.005 is controlled. The low speed is: B=10-5, N=0.2, △N=0.2, and the disc surface shape is ±0.5μ. After grinding and polishing, the lower disc is tapped or soaked in acetone, and the semi-finished chamfering of the blank 1 is performed: the finished angle of the polished surface is 0.1+0.1×45°, and a secondary cleaning is performed. At this time, the blank 1 that has been processed with the top surface 11, the bottom surface 12, the first side surface 13 and the second side surface 14 can be obtained.

[0083] In some embodiments, the bottom surface 12 of the part is lightly glued onto the first tool 2, and the specific steps include:

[0084] Provide a second tooling, see Figure 5 The second tooling includes a platform 5, a vertical support body 6, a V-groove tooling 7 and a baffle 8, and the V-groove tooling 7 is provided with a V-groove with an opening angle of 90°;

[0085] The vertical support body 6 is arranged on the platform 5, and the side surface of the V-groove tooling 7 is stopped against the vertical support body 6, so that the V-groove opening of the V-groove tooling 7 faces upward;

[0086] The first side wall 21 and the second side wall 22 of the first tooling 2 are stopped in the V-shaped groove;

[0087] A photoresist baffle 8 is formed on the side of the vertical support body 6, so that the baffle 8 is away from the side of the vertical support body 6 and is perpendicular to the first inclined surface 25;

[0088] The first side surface 13 is pressed against the baffle 8 , so that the bottom surface 12 of the blank 1 is glued to the middle position of the first inclined surface 25 .

[0089] In some embodiments, the first side surface 13 of the part is placed against the baffle 8 so that the bottom surface 12 is bonded to the middle of the first inclined surface 25. The specific steps include:

[0090] After the part is polished on the first inclined surface 25, the interference fringes on the platform 5 are observed from directly above the part. When the interference fringes are evenly distributed on both sides of the V-shaped groove, the part is polished on the middle position of the first inclined surface 25;

[0091] The first side surfaces 13 of the plurality of parts are sequentially bonded to the baffle 8 with photoresist, so that the plurality of parts are located at the middle of the first inclined surface 25 .

[0092] In some embodiments, the second tooling also includes a pad 9. When the first side wall 21 and the second side wall 22 of the first tooling 2 are stopped in the V-groove, the pad 9 is also included. The pad 9 is set on one side wall of the V-groove so that the pad 9 is supported between the V-groove and the first side wall 21 or the second side wall 22 to adjust the position of the second tooling in the V-groove.

[0093] Further, the first side wall 21 of the first tool 2 is laminated to the laminate disc, and the cylindrical angle between the first side surface 13 and the top surface 11 is milled to form a first ridge surface 3 parallel to the first side wall 21. The specific steps include:

[0094] Put the bottom surface 12 of the part on the first tooling 2, and when there are multiple blanks 1, confirm that the height consistency is 0.01 (the ground A surface is used as the reference, and the blank 1 is controlled to be centered with the pad 9), apply glue, and bake;

[0095] Apply glue to the first side wall 21 on the glue plate to reinforce it;

[0096] The cylindrical angle between the first side surface 13 and the top surface 11 is polished at a low speed, and the grinding size is based on the upper plate method and the sagittal height of the pad 9, with a reference size of (17.71+5.41)×0.707+0.15;

[0097] Grind off 0.1; control the disc Δt≤0.005, grind off 0.05 (accurately record the frosting size, ensure that the frosting size on both sides is consistent, and the finished product height size is 5.33±0.12 (to the tip));

[0098] Low-speed polishing removes 0.015 in size, B = 10-5, N = 0.2, △N = 0.2;

[0099] Tap the lower plate to clean the first tooling 2.

[0100] Further, the second side wall 22 of the first tool 2 is laminated to the laminate disc, and the cylindrical angle between the second side surface 14 and the top surface 11 is milled to form a second ridge surface 4 parallel to the second side wall 22. The specific steps include:

[0101] Turn over the first tooling 2, and glue the second side wall 22 to the glue plate to reinforce it;

[0102] The cylindrical angle between the second side surface 14 and the top surface 11 is polished at a low speed, and the grinding size is based on the upper plate method and the sagittal height of the pad 9, with a reference size of (17.71+5.41)×0.707+0.15;

[0103] Grind off 0.1; control the disc Δt≤0.005, grind off 0.05 (accurately record the grinding size, ensure that the grinding size on both sides is consistent, the finished product height size is 5.33±0.12 (to the tip), and the ridge chamfer width is 0.076±0.025);

[0104] Low speed polishing to size 0.015, B = 10-5, N = 0.2, △N = 0.2;

[0105] Tap the lower plate.

[0106] In some embodiments, the ridge edge is chamfered, and the specific steps include:

[0107] The ridge edge is chamfered 0.1+0.1×45° to a preset width and a preset angle, wherein 0.1 represents the width of the chamfer, which is 0.1 mm, and 0.1×45° represents the chamfer angle of 45 degrees, and the length of the bevel of the chamfer is 0.1 mm.

[0108] Furthermore, the first roof surface 3 and the second roof surface 4 are finely polished, and the specific steps include:

[0109] Check the width of the ridge edge. If the width exceeds the threshold value a, first gluing the first ridge surface 3 of the ridge edge to the rectangular parallelepiped, fine-tuning the second ridge surface 4, and then gluing the second ridge surface 4 of the ridge edge to the rectangular parallelepiped, and fine-tuning the first ridge surface 3. The dimensions removed by fine-tuning the first ridge surface 3 and the second ridge surface 4 are both a / 2.

[0110] The specific steps include:

[0111] Put the glossy glue parts on the plate, put a ridge glossy glue on the 0.5″ cuboid (material JGS2), apply glue, and bake;

[0112] Upper plate polishing plate: 160 / Φ300 plate, glued;

[0113] Low speed polishing to size 0.01, B = 10-5, N = 0.2, △ N = 0.1, 90° ± 1.8″;

[0114] Tap the lower plate to clean it;

[0115] Polish the upper rectangular block, glue another ridge surface on the 0.5″ rectangular block (material JGS2), apply glue, and bake;

[0116] Upper plate polishing plate: 160 pieces / Φ300 plate, glued;

[0117] Low-speed polishing to size 0.01, B = 10-5, N = 0.2, △ N = 0.1, 90° ± 1.8″, the disc can only be removed after the special chamfer width is qualified;

[0118] Tap the lower plate and clean it.

[0119] Finally, quality inspection is carried out to ensure quality (final inspection) before finished products are put into storage: the image measuring instrument is magnified 50 times (no more than 2 broken edges of 0.005-0.05 size; broken edges below 0.005 are negligible) and the ridge angles are fully inspected, and a table record is provided.

[0120] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A method for processing a Porro prism, characterized in that: The blank is a cuboid, comprising a top surface, a bottom surface, and a first side surface and a second side surface opposite to each other. The method comprises the following steps: Processing the first side surface and the second side surface of the blank so that the surface shapes of the first side surface and the second side surface reach the first surface shape reference and are parallel; The lower plate is inverted to obtain a part by calculating the cylindrical angles between the first side surface, the second side surface and the bottom surface; Processing the bottom surface and the top surface of the part so that the top surface and the bottom surface are parallel and reach a preset size; Apply the bottom surface polish glue of the part on a first tooling, wherein the first tooling includes a first side wall, a second side wall, a third side wall and a fourth side wall which are perpendicular to each other, a first inclined surface is provided between the third side wall and the fourth side wall, and the first inclined surface forms an angle of 45° with the third side wall and the fourth side wall respectively, wherein the bottom surface polish glue is in the middle of the first inclined surface; Polish the first side wall of the first tooling to the polishing plate, mill the cylindrical angle between the first side surface and the top surface to form a first ridge surface parallel to the first side wall; Polish the second side wall of the first tooling to the polishing plate, mill the cylindrical angle between the second side surface and the top surface to form a second ridge surface parallel to the second side wall, and form a ridge edge between the first ridge surface and the second ridge surface; Chamfer the roof ridge; The first ridge surface and the second ridge surface are finely polished.

2. The method for processing a Porro prism according to claim 1, characterized in that: The first side surface and the second side surface of the blank are processed so that the surface shapes of the first side surface and the second side surface reach the first surface shape reference and are parallel. The specific steps include: Roll the bottom surface of the blank onto a cuboid so that the first side surface is parallel to and higher than the side surface of the cuboid, and grind and polish the first side surface; Place the blank on a plate and glue the first side surface onto a glue plate; The second side surface is frosted and polished.

3. The method for processing a Porro prism according to claim 1, characterized in that: The bottom surface and the top surface of the part are processed so that the top surface and the bottom surface are parallel and reach a preset size. The specific steps include: Put the first side surface onto the cuboid so that the bottom surface is parallel to and higher than the side surface of the cuboid, and grind and polish the bottom surface; The bottom surface is laminated on a laminate disc, and the top surface is sanded and polished in sequence.

4. The method for processing a Porro prism according to claim 1, characterized in that: Applying gloss glue to the bottom surface of the part on the first tooling, the specific steps include: Providing a second tool, the second tool comprising a platform, a vertical support body, a V-groove tool and a baffle, wherein the V-groove tool is provided with a V-groove with an opening angle of 90°; The vertical support body is arranged on the platform, and the side surface of the V-groove tooling is stopped against the vertical support body, so that the V-groove opening of the V-groove tooling faces upward; Abutting the first side wall and the second side wall of the first tool against the V-shaped groove; The baffle is glued to the side of the vertical support body so that the baffle is away from the side of the vertical support body and is perpendicular to the first inclined surface; The first side surface is pressed against the baffle plate so that the bottom surface gloss adhesive is located in the middle of the first inclined surface.

5. The method for processing a Porro prism according to claim 1, characterized in that: The first side surface is pressed against the baffle plate so that the bottom surface gloss adhesive is in the middle of the first inclined surface. The specific steps include: After the part is polished on the first inclined surface, the interference fringes on the platform are observed from directly above the part. When the interference fringes are evenly distributed on both sides of the V-shaped groove, the part is polished on the middle position of the first inclined surface; The first side surfaces of the plurality of parts are sequentially spaced with photo glue to the baffle, so that the plurality of parts are all located in the middle of the first inclined surface.

6. The method for processing a Porro prism according to claim 1, characterized in that: The second tooling also includes a pad. When the first side wall and the second side wall of the first tooling are stopped in the V-shaped groove, the pad is also arranged on a side wall of the V-shaped groove so that the pad is supported between the V-shaped groove and the first side wall or the second side wall to adjust the position of the second tooling in the V-shaped groove.

7. The method for processing a Porro prism according to claim 1, characterized in that: The first side wall of the first tool is laminated to the laminate disc, and the cylindrical angle between the first side surface and the top surface is milled to form a first ridge surface parallel to the first side wall. The specific steps include: Apply glue to the first side wall to the glue plate to reinforce it; The predetermined dimension is removed by polishing the cylindrical angle between the first side surface and the top surface at a low speed.

8. The method for processing a Porro prism according to claim 1, characterized in that: The second side wall of the first tool is laminated to the laminate disc, and the cylindrical angle between the second side surface and the top surface is milled to form a second ridge surface parallel to the second side wall. The specific steps include: Turn over the first tooling, glue the second side wall to the glue plate, and apply glue to reinforce it; Removing a preset size by polishing the cylindrical angle between the second side surface and the top surface at a low speed; Tap the lower plate.

9. The method for processing a Porro prism according to claim 6, characterized in that: Chamfer the roof ridge. The specific steps include: The ridge edge is chamfered to a preset width and a preset angle.

10. The method for processing a Porro prism according to claim 6, characterized in that: The first roof surface and the second roof surface are finely polished, and the specific steps include: Check the width of the ridge. If the width exceeds the threshold value a, first gluing the first ridge surface of the ridge to the cuboid. Refine the second roof surface; Then, the second ridge surface of the ridge edge is laminated to the rectangular parallelepiped, and the first ridge surface is refined, wherein the size removed during the refinement of the first ridge surface is a / 2.

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