A high-precision polishing method for right-angle roof prisms

Abstract

The present application relates to a high-precision polishing method of a right-angled ridge prism, belonging to the technical field of optical processing. One ridge surface of the right-angled ridge prism is processed into a reference surface, and is combined with a separately designed corner optical cement tool to form an optical cement body. The same specification optical cement bodies are fixed on an optical cement pad in batches to form a mirror disc. Each type of surface is processed and quality controlled in turn. The precision of the tool is effectively copied to the prism by using the corner optical cement tool, so that the included angle of the two transmission surfaces of the processed ridge prism and the surface image horizontal and vertical coordinate offset of the incident light can reach extremely high angular value precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical processing technology, in particular to a high-precision right-angle roof prism polishing method. BACKGROUND

[0002] Roof prism has the functions of turning light path, rotating image, directional reflection, shortening system light path, etc., and is widely used in observation and sighting systems of army and warships. In the optical system of visual optical instruments, roof prism is often used to turn image. Compared with other prism groups or lens groups, roof prism has the advantage of small size. With the continuous development of optical technology, the precision of roof prism in optical system is getting higher and higher. Generally, in addition to the requirement of high precision of roof prism for roof angle, the indexes of two transmission surfaces, i.e. the included angle of isosceles surface and θI (the horizontal coordinate offset of incident light surface image and reflected image), θII (the vertical coordinate offset of incident light surface image and reflected image) are also very strict. The traditional angle modification method cannot guarantee the indexes of the included angle of two transmission surfaces (isosceles surface), θI and θII at the same time.

[0003] Brief introduction of optical cement replication method: optical cement is to make two polished surfaces of optical prisms tightly contact and adhere together by using the attraction between molecules. The prism and the tool are cemented together to form an optical cement body, and then the optical cement body is cemented on the optical cement pad to form a mirror disc. At this time, the surface to be processed of the prism and the lower surface of the optical cement pad are parallel to each other, and the precision of the tool is copied to the prism by controlling the parallelism between the surface to be processed and the lower surface of the pad. SUMMARY

[0004] In view of the above analysis, the present application aims to provide a high-precision right-angle roof prism polishing method to solve the problem that the existing method cannot guarantee the indexes of the included angle of two transmission surfaces and flatness (θI, θII) at the same time.

[0005] A high-precision right-angle roof prism polishing method, comprising the following processes:

[0006] comprising the following processes:

[0007] Processing the first roof surface of the prism as a reference surface;

[0008] Cementing the first roof surface of the prism and the first surface of the corner cementing tool to form an optical cement body;

[0009] Cementing the second surface of the corner cementing tool and the optical cement pad, processing the second roof surface of the prism, and after the processing is completed, dissociating the optical cement body and the optical cement pad, and protecting the second roof surface of the prism by applying glue;

[0010] The third face of the corner optical cementing tool is fixed with the optical cementing pad, the first isosceles face of the prism is processed, and the optical cementing body is separated from the optical cementing pad after the processing is completed, and the first isosceles face of the prism is protected by gluing;

[0011] The fourth face of the corner optical cementing tool is fixed with the optical cementing pad, and the second isosceles face of the prism is processed;

[0012] The optical cementing body is separated from the optical cementing pad, the prism is separated from the corner optical cementing tool, and the cleaning and detection process is completed.

[0013] Based on the further improvement of the above method, the corner optical cementing tool is a ten-faced optical crystal structure, wherein,

[0014] The first, second, third, fourth and fifth faces are used as optical cementing working faces; the first face and the second face, and the fifth face and the tenth face respectively form two opposite right-angled ridge roofs;

[0015] The first face and the tenth face are parallel to each other, the same in size and in the shape of isosceles hexagons, and the second face and the fifth face are parallel to each other, the same in size and in the shape of isosceles trapezoids;

[0016] The base of the first face isosceles hexagon and the base of the fifth face isosceles trapezoid are co-edges, and the base of the tenth face isosceles hexagon and the base of the second face isosceles trapezoid are co-edges;

[0017] The third face, the fourth face, the eighth face and the ninth face are isosceles triangles with the same size and shape; the two waists of the eighth face are co-edges with the waists of one side of the first face and the second face, and the two waists of the ninth face are co-edges with the waists of the other side of the first face and the second face; the two waists of the third face are co-edges with the waists of one side of the fifth face and the tenth face; and the two waists of the fourth face are co-edges with the waists of the other side of the fifth face and the tenth face;

[0018] The eighth face and the ninth face are perpendicular to each other, the third face and the fourth face are perpendicular to each other, the third face and the ninth face are parallel to each other, and the fourth face and the eighth face are parallel to each other;

[0019] The included angle between the first face, the second face and the third face, the fourth face is 60°;

[0020] The sixth face and the seventh face are parallelograms parallel to each other, the same in shape and size; the four edges of the seventh face are co-edges with the short edge of one side of the first face, the base of the fourth face, the base of the ninth face and the short edge of one side of the tenth face; and the four edges of the sixth face are co-edges with the short edge of the other side of the first face, the base of the third face, the base of the eighth face and the short edge of the other side of the tenth face.

[0021] Based on the further improvement of the above method, the length of the corner optical cementing tool is the vertical distance between the 6th and 7th surfaces, the height is the vertical distance between the 2nd and 5th surfaces, and the width is the vertical distance between the 1st and 10th surfaces.

[0022] Based on the further improvement of the above method, the length of the corner optical cementing tool is the length of the prism ridge plus 3-5 mm.

[0023] Based on the further improvement of the above method, the height of the corner optical cementing tool is calculated as follows:

[0024] In the formula,

[0025] h' is the thickness of the prism,

[0026] L is the height from the prism ridge to the opposite bottom surface,

[0027] x is the reserved loss height.

[0028] Based on the further improvement of the above method, the reserved loss height is 3-5 mm.

[0029] Based on the further improvement of the above method, when the first ridge surface of the prism is combined with the 1st surface of the corner optical cementing tool, the second ridge surface of the prism is flush with the 5th surface of the corner optical cementing tool, and the left side of the prism is padded with an auxiliary glass sheet to make the two optical cementing surfaces symmetrical and the axes coincide, wherein the thickness of the auxiliary glass pad is 1 / 2 of the difference between the chord length of the prism and the length of the corner optical cementing tool, and the chord length of the prism is the length of the connecting line between the two triangular non-working surface bottom edges.

[0030] Based on the further improvement of the above method, a plurality of optical cementing bodies of the same specification are simultaneously cemented on the optical cementing pad to form a mirror disc to be processed, and the same type of planes of each right-angled ridge prism are simultaneously processed, and after processing, the parallel height difference between the processed surface of each optical cementing body and the optical cementing pad is ≤0.002 mm, which meets the processing standard.

[0031] Based on the further improvement of the above method, the second ridge surface, the first isosceles surface and the second isosceles surface of the prism contained in the optical cementing body are respectively parallel to the 2nd surface, the 3rd surface and the 4th surface of the corner optical cementing tool.

[0032] Based on the further improvement of the above method, the reference surface of the prism is fixed on the attached mold by using gypsum, and the first ridge surface of the prism is processed to achieve an optical circle ≤0.5 and a local optical circle ≤0.2.

[0033] Compared with the prior art, the present application can at least achieve one of the following beneficial effects:

[0034] 1. The present application is suitable for optical high-precision right-angled ridge prism precision polishing, which can improve the angle value precision of the right-angled ridge prism and greatly reduce the angle value precision control difficulty of such parts.

[0035] 2. According to the spatial angle relationship of each polishing surface of the right-angled ridge prism, the corner optical glue tool designed by the present application can copy the precision of the tool to the parts, greatly improve the comprehensive qualified rate of prism processing, and significantly shorten the processing cycle.

[0036] In the present application, the above technical solutions can be combined with each other to realize more preferred combination solutions. Other features and advantages of the present application will be described in the subsequent specification, and some advantages will become apparent from the specification or be understood by implementing the present application. The purpose and other advantages of the present application can be realized and obtained through the contents specifically pointed out in the specification and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings are included to provide a further understanding of the embodiments, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application, and together with the description serve to explain the principles of the application, and should not be considered limiting of the present application in scope, as numerous embodiments can be made and equivalents can be used.

[0038] Figure 1 The process flowchart of the embodiment of the present application.

[0039] Figure 2a The corner optical glue tool structure schematic diagram of the embodiment of the present application.

[0040] Figure 2b The right-angled ridge prism structure schematic diagram of the embodiment of the present application.

[0041] Figure 3 The right-angled ridge prism size marking schematic diagram of the embodiment of the present application.

[0042] Figure 4 The optical glue three-dimensional diagram of the embodiment of the present application.

[0043] Reference signs:

[0044] 1-1st surface of corner optical glue tool;

[0045] 2-2nd surface of corner optical glue tool;

[0046] 3-3rd surface of corner optical glue tool;

[0047] 4-4th surface of corner optical glue tool;

[0048] 5-5th surface of corner optical glue tool;

[0049] 6-6th surface of corner optical glue tool;

[0050] 7-7th surface of corner optical glue tool;

[0051] 8-Corner gloss adhesive tool, 8th side;

[0052] 9-Corner Gloss Adhesive Tool, 9th Side;

[0053] 10-Corner Gloss Adhesive Tool, 10th Side;

[0054] a-Right-angle roof prism, first roof ridge surface (reference surface);

[0055] b-Right-angle roof prism, second roof ridge surface;

[0056] c - First isosceles surface of right-angled roof prism;

[0057] d-Second isosceles surface of a right-angled roof prism;

[0058] e-Right-angle roof prism triangular non-working surface;

[0059] f-Right-angle roof prism isosceles trapezoidal non-working surface;

[0060] g-Right-angle roof prism bottom surface (non-working surface);

[0061] h - Right-angle roof prism roof ridge line;

[0062] i-Right-angle roof prism chord length. Detailed Implementation

[0063] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0064] A specific embodiment of the present invention discloses a high-precision polishing method for right-angle roof prisms, comprising the following processes:

[0065] The first ridge surface of the prism is machined and used as a reference surface;

[0066] The first ridge surface of the prism is bonded to the first surface of the corner adhesive tool to form an adhesive body;

[0067] The second side of the corner adhesive tool is fixed to the adhesive pad with adhesive, the second ridge surface of the prism and the fifth side of the corner adhesive tool are processed, and after processing, the adhesive body is separated from the adhesive pad and adhesive is applied to protect the second ridge surface of the prism and the fifth side of the corner adhesive tool.

[0068] The third side of the corner adhesive tool is fixed to the adhesive pad with adhesive, and the first isosceles surface of the prism is processed. After processing, the adhesive body is separated from the adhesive pad, and adhesive is applied to protect the first isosceles surface of the prism.

[0069] The fourth surface of the corner optical cementing tool is fixed with the optical cementing pad, and the second isosceles surface of the prism is processed;

[0070] The optical cementing body is separated from the optical cementing pad, and the prism is separated from the corner optical cementing tool, and the cleaning and detection process is completed.

[0071] Specifically, as shown in Figure 1 The processing steps of the embodiment are specifically as follows:

[0072] Step S1: processing the first ridge surface a of the prism as a reference surface.

[0073] Further, the reference surface of the prism is fixed on the mounting mold by using gypsum, and the first ridge surface of the prism is processed to achieve an optical circle ≤0.5 and a local optical circle ≤0.2.

[0074] Specifically, the first step of processing the right-angled ridge prism needs to determine the processing reference surface, and the specific method is to fix the blank prism on the ring polishing machine processing disc by using gypsum, and the blank prism is a prism whose all surfaces have not been polished. The blank prism is fixed with one ridge surface facing the ring polishing mold. After the ring polishing machine is finely ground and polished, the surface shape of the processed surface is measured by using a plane interferometer to meet the optical circle ≤0.5 and the local optical circle ≤0.2, and then the reference surface processing is completed.

[0075] Step S2: bonding the first ridge surface a of the prism to the first surface 1 of the corner optical cementing tool to form an optical cementing body.

[0076] Further, as shown in Figure 2a The corner optical cementing tool is a ten-surface optical crystal structure, wherein,

[0077] The first, second, third, fourth and fifth surfaces are used as optical cementing working surfaces; the first surface and the second surface, and the fifth surface and the tenth surface respectively form two right-angled ridges facing away from each other;

[0078] The first surface and the tenth surface are parallel to each other, have the same size, and are both isosceles hexagons; the second surface and the fifth surface are parallel to each other, and are both isosceles trapezoids;

[0079] The base of the first isosceles hexagon and the base of the fifth isosceles trapezoid are co-edges, and the base of the tenth isosceles hexagon and the base of the second isosceles trapezoid are co-edges;

[0080] The third, fourth, eighth and ninth surfaces are isosceles triangles with the same size and shape; the two waists of the eighth surface are co-edges with the waists of one side of the first surface and the second surface, respectively; the two waists of the ninth surface are co-edges with the waists of the other side of the first surface and the second surface, respectively; the two waists of the third surface are co-edges with the waists of one side of the fifth surface and the tenth surface, respectively; and the two waists of the fourth surface are co-edges with the waists of the other side of the fifth surface and the tenth surface, respectively;

[0081] The 8th and 9th faces are perpendicular to each other; the 3rd and 4th faces are perpendicular to each other; the 3rd and 9th faces are parallel to each other; and the 4th and 8th faces are parallel to each other.

[0082] The angle between the first and second faces and the third and fourth faces is 60°.

[0083] Faces 6 and 7 are parallelograms of the same shape and size; the four sides of face 7 share a side with the short side of face 1, the bottom side of face 4, the bottom side of face 9, and the short side of face 10; the four sides of face 6 share a side with the short side of face 1 on the other side, the bottom side of face 3, the bottom side of face 8, and the short side of face 10 on the other side.

[0084] like Figure 2b As shown, the right-angled ridge prism in this embodiment has 9 faces. The first ridge face a and the second ridge face b are perpendicularly symmetrical along the ridge edge h and have the same shape, both being hexagonal. e consists of two triangular non-working faces, c is the first isosceles face, and d is the second isosceles face, with c and d being perpendicular to each other. f consists of two isosceles trapezoidal non-working faces. g is a rectangular non-working face. The angle between the ridge faces a and b and the isosceles faces c and d is 60°. The distance between the two perpendicular lines sharing the same side between the triangular non-working face e and the isosceles faces c and d is the chord length i of the prism.

[0085] The key point of this embodiment is to design a corner photopolymer tool based on the spatial angular relationship of each polished surface of the right-angle roof prism. Since the size, specifications and shape of the right-angle roof prism are unique, the design of the corner photopolymer tool must take into account the size and specifications of the tool and the prism combined into a photopolymer body suitable for processing, and minimize the number of photopolymerization and dissociation steps to avoid additional losses. At the same time, the tool and the prism are combined into a photopolymer body for joint processing, so that the tool can meet the process requirements first, and thus the precision of the tool can be copied to the part when processing subsequent prisms.

[0086] Step S3: Apply the second surface 2 of the corner adhesive tool to the adhesive pad, process the second ridge surface b of the prism and the fifth surface 5 of the corner adhesive tool. After processing, separate the adhesive from the adhesive pad and apply adhesive to protect the second ridge surface b of the prism and the fifth surface 5 of the corner adhesive tool.

[0087] Furthermore, the corner adhesive tool has a length equal to the distance between the 6th and 7th faces, a height equal to the distance between the 2nd and 5th faces, and a width equal to the distance between the 1st and 10th faces.

[0088] Specifically, this embodiment discloses a corner adhesive tool for processing right-angle roof prisms. The right-angle roof prism is positioned on the adhesive tool once using a reference surface. Then, the other three reference surfaces of the corner adhesive tool are applied to the adhesive pad in stages to form a mirror plate for processing. This allows for effective control of the angle processing accuracy of the right-angle roof prism, effectively ensuring the processing accuracy of high-precision right-angle roof prisms.

[0089] Furthermore, when the first ridge surface of the prism is bonded to the first surface of the corner adhesive tool, the second ridge surface of the prism is flush with the fifth surface of the corner tool. An auxiliary glass pad is placed on the left side of the prism to make the symmetry axes of the two adhesive surfaces coincide. The thickness of the auxiliary glass pad is 1 / 2 of the difference between the chord length of the prism and the length of the corner adhesive tool.

[0090] Furthermore, the length of the corner adhesive tool is taken as the length of the prism ridge edge plus 3 to 5 mm.

[0091] Specifically, considering machining losses, the loss per machining cycle for a flat surface is 0.05-0.08mm, and the tool life is approximately 60 cycles. Therefore, add a machining loss height of 3-5mm. For example... Figure 4 As shown, first, apply adhesive to the fifth surface (5) of the corner adhesive tool onto the flat glass. Then, apply adhesive to the first ridge surface (a) of the right-angle ridge prism (i.e., the polished prism reference surface) onto the first surface (1) of the corner adhesive tool. Simultaneously, keep the fifth surface (5) of the corner adhesive tool flush with the second ridge surface (b) of the right-angle ridge prism. Use an auxiliary glass sheet as a shim (not shown in the figure), supporting the left side to ensure the prism's dimensions are consistent along the ridge direction. Align the reference surface (a) of the right-angle ridge prism with the center of the first surface (1) of the corner adhesive tool, making the adhesive a centrally symmetrical whole. Preferably, the thickness of the auxiliary glass sheet = (prism chord length 54.25 - tool length 41) ÷ 2 = 6.63 mm. Generally, the thickness is 6.6 mm ± 0.2 mm.

[0092] Furthermore, the method for calculating the height of the corner adhesive tool is expressed as a formula:

[0093] In the formula,

[0094] h' is the thickness between the two parallel non-working surfaces of the prism.

[0095] L is the height from the prism ridge edge to the opposite bottom surface.

[0096] x represents the height reserved for potential losses.

[0097] Furthermore, the reserved loss height is 3-5mm.

[0098] In this embodiment, as Figure 3As shown, the prism ridge edge length is 40mm and the chord length is 54.25mm. The corner finishing tool should be designed according to the following principles: the tool's length should be slightly longer than the prism ridge edge length but less than the prism chord length; its height should be higher than the vertical height of the prism when processing the ridge surface (in conjunction with...). Figure 4 The optical colloid shown here represents the distance from the processed roof ridge surface to the lowest point of the prism. This height is calculated according to... Figure 3 The height dimension is calculated based on the dimensions shown. Considering processing losses, the height loss per processing cycle is 0.05-0.07mm, and the tool life is 40-60 cycles. Based on this, the height is increased accordingly. The width dimension determines the size of the 3rd and 4th sides of the tool, with the principle of facilitating the application of the tool to the adhesive mat. Therefore, the length, height, and width of the corner adhesive tool in this embodiment are 41mm, 32.1mm, and 22.1mm, respectively.

[0099] Step S4: Fix the third surface 3 of the corner adhesive tool to the adhesive pad with adhesive, process the first isosceles surface c of the prism, and after processing, separate the adhesive body from the adhesive pad and apply adhesive to protect the first isosceles surface c of the prism.

[0100] Furthermore, the second ridge surface, the first isosceles surface, and the second isosceles surface of the prism contained in the optical colloid are parallel to the second, third, and fourth surfaces of the corner optical colloid tool, respectively.

[0101] Specifically, such as Figure 4 As shown, the optical adhesive body is composed of a corner optical adhesive tool on the left and a right-angled roof prism optical adhesive on the right. The second, third, and fourth surfaces of the corner optical adhesive tool on the left are parallel to the second ridge surface b, the first isosceles surface c, and the second isosceles surface d of the right-angled roof prism, respectively. During production, the second surface 2 of the corner optical adhesive tool is applied to the optical adhesive pad, and the second ridge surface b of the right-angled roof prism is finely ground and polished. The third surface 3 of the corner optical adhesive tool is applied to the optical adhesive pad, and the first isosceles surface c of the right-angled roof prism is finely ground and polished. The fourth surface 4 of the corner optical adhesive tool is applied to the optical adhesive pad, and the second isosceles surface d of the right-angled roof prism is finely ground and polished.

[0102] Furthermore, in order to process the ridge prisms in batches, multiple corner adhesive tools can be used to process multiple ridge prisms simultaneously.

[0103] Specifically, multiple photocolloids of the same specification are simultaneously photocoated onto a photocolloid pad to form a mirror disk to be processed. The same type of plane of each right-angle roof prism is processed simultaneously. After processing, if the parallel height difference between the processed surface of each photocolloid and the photocolloid pad is ≤0.002mm, the processing meets the standard.

[0104] The corner adhesive tool applies adhesive to a circular fixture, where the prism to be processed is machined on an adhesive pad. The surrounding triangular prisms are made of glass, and the center is the adhesive material. Preferably, in this embodiment, an adhesive pad with a diameter of φ220~φ300 is used. The surface shape is measured using a plane interferometer and meets the requirements of aperture ≤0.5 and local aperture ≤0.2.

[0105] Apply the second side of the corner adhesive tool to the adhesive pad. During the fine grinding process, use a micrometer to measure the thickness of each adhesive element in the mirror plate to control the parallelism of the mirror plate. Apply a load to the thick end of the mirror plate. Before removing the plate, use a micrometer to check that the parallelism of the mirror plate is ≤0.002mm. If the current processing surface meets the standard, then separate each adhesive element from the adhesive pad and re-adhere the other processing surface of each element to the adhesive pad to form the mirror plate, thus starting the processing of the next surface.

[0106] Step S5: Fix the fourth surface 4 of the corner adhesive tool to the adhesive pad with adhesive, and process the second isosceles surface d of the prism.

[0107] Step S6: Separate the photocolloid from the photocolloid pad, and separate the prism from the corner photocolloid tool to complete the cleaning and inspection process.

[0108] It should be noted that each time the photocolloid and the photocolloid pad are combined to form a mirror plate, the exposed surfaces of each photocolloid must be the same type of plane, that is, either all are ridge surfaces or all are isosceles surfaces.

[0109] After adopting this solution, the overall pass rate of the two transmission surfaces of the part, θⅠ, and θⅡ has increased from less than 30% to 100%, and the processing cycle has been shortened from 6 working days to 4 working days.

[0110] The shape design of the corner adhesive tool is key to this invention. Furthermore, the control of various process parameters ensures a high level of corner accuracy for the parts. Specifically, the main functions of each process parameter control are as follows:

[0111] Environmental temperature and humidity requirements: These are related to the quality of the photopolymerization process. The quality of the photopolymerization affects the angular accuracy and surface defects of the parts, which is very important for the polishing of high-precision optical parts.

[0112] Requirements for optical adhesive pads: As a basic tooling for the processing of optical components, the surface shape and thickness differences of optical adhesive pads will affect the control of parallelism of the mirror disk.

[0113] During the processing, the parallelism difference of the mirror disk is controlled to be ≤0.002mm: Because this process scheme uses a corner photoresist tool to copy the part, the angular accuracy of the tool is indirectly copied onto the part by controlling the parallelism difference of the mirror disk during the processing.

[0114] This invention is applicable to the precision polishing of optical high-precision right-angle roof prisms, which can improve the angular accuracy of right-angle roof prisms and significantly reduce the difficulty of controlling the angular accuracy of such parts.

[0115] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-precision polishing method for right-angle roof prisms, characterized in that, Includes the following processes: The first ridge surface of the prism is machined and used as the reference surface; The first ridge surface of the prism is optically bonded to the first surface of the corner optical adhesive tool to form an optical adhesive body, wherein the corner optical adhesive tool is an optical crystal with a decahedral structure. Surfaces 1, 2, 3, 4, and 5 are used as the working surfaces for the gloss adhesive; Surface 1 and 2, and Surface 5 and 10 respectively form two opposing right-angled ridges; The first face and the tenth face are parallel to each other, the same size and both are isosceles hexagons. The second face and the fifth face are parallel to each other, the same size and both are isosceles trapezoids. The base of the first isosceles hexagon shares a side with the base of the fifth isosceles trapezoid, and the base of the tenth isosceles hexagon shares a side with the base of the second isosceles trapezoid. The third, fourth, eighth, and ninth faces are isosceles triangles of the same size and shape; the two legs of the eighth face share sides with the legs of the first and second faces on one side, respectively; the two legs of the ninth face share sides with the legs of the first and second faces on the other side, respectively; the two legs of the third face share sides with the legs of the fifth and tenth faces on one side, respectively; and the two legs of the fourth face share sides with the legs of the fifth and tenth faces on the other side, respectively. The 8th and 9th faces are perpendicular to each other; the 3rd and 4th faces are perpendicular to each other; the 3rd and 9th faces are parallel to each other; and the 4th and 8th faces are parallel to each other. The angle between the first and second faces and the third and fourth faces is 60°. Faces 6 and 7 are parallelograms of the same shape and size; the four sides of face 7 share a side with the short side of face 1 on one side, the bottom side of face 4, the bottom side of face 9, and the short side of face 10 on one side; the four sides of face 6 share a side with the short side of face 1 on the other side, the bottom side of face 3, the bottom side of face 8, and the short side of face 10 on the other side. The second side of the corner adhesive tool is fixed to the adhesive pad with adhesive, and the second ridge surface of the prism is processed. After processing, the adhesive body is separated from the adhesive pad, and adhesive is applied to protect the second ridge surface of the prism. The third side of the corner adhesive tool is fixed to the adhesive pad with adhesive to process the first isosceles surface of the prism. After processing, the adhesive body is separated from the adhesive pad and adhesive is applied to protect the first isosceles surface of the prism. Fix the fourth side of the corner adhesive tool to the adhesive pad with adhesive to process the second isosceles surface of the prism; The photocolloid is separated from the photocolloid pad, and the prism is separated from the corner photocolloid tool to complete the cleaning and inspection process.

2. The high-precision right-angle roof ridge prism polishing method according to claim 1, characterized in that, The corner adhesive tool has a length equal to the perpendicular distance between the 6th and 7th faces, a height equal to the perpendicular distance between the 2nd and 5th faces, and a width equal to the perpendicular distance between the 1st and 10th faces.

3. The high-precision right-angle roof ridge prism polishing method according to claim 2, characterized in that, The length of the corner adhesive tool is the length of the prism ridge edge plus 3-5 mm.

4. The high-precision right-angle roof ridge prism polishing method according to claim 3, characterized in that, The method for calculating the height of the corner adhesive tool is expressed as a formula: In the formula, h' is the prism thickness. L is the height from the prism ridge edge to the opposite bottom surface. x represents the height reserved for potential losses.

5. The high-precision right-angle roof ridge prism polishing method according to claim 4, characterized in that, The reserved loss height is 3-5mm.

6. The high-precision right-angle roof ridge prism polishing method according to claim 5, characterized in that, When the first ridge surface of the prism is bonded to the first surface of the corner adhesive tool, the second ridge surface of the prism is flush with the fifth surface of the corner adhesive tool. An auxiliary glass pad is placed on the left side of the prism to make the symmetry axis of the two adhesive surfaces coincide. The thickness of the auxiliary glass pad is 1 / 2 of the difference between the chord length of the prism and the length of the corner adhesive tool. The chord length of the prism is the length of the line connecting the base sides of the two non-working surfaces of the triangle.

7. The high-precision right-angle roof ridge prism polishing method according to claim 6, characterized in that, Multiple photocolloids of the same specification are simultaneously photocoated onto a photocoating pad to form a mirror disk to be processed. The same type of plane of each right-angle roof prism is processed simultaneously. After processing, if the parallel height difference between the processed surface of each photocolloid and the photocoating pad is ≤0.002mm, the processing meets the standard.

8. The high-precision polishing method for a right-angle roof prism according to claim 7, characterized in that, The optical colloid contains a prism whose second ridge surface, first isosceles surface, and second isosceles surface are parallel to the second, third, and fourth surfaces of the corner optical colloid tool, respectively.

9. The high-precision polishing method for a right-angle roof prism according to claim 8, characterized in that, The reference surface of the prism is obtained by fixing the prism to the mounting mold with plaster, and processing the first ridge surface of the prism to achieve an aperture ≤ 0.5 and a local aperture ≤ 0.2.

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