A method for fabricating an optical component with a light-reflecting cavity

Abstract

This application provides a method for processing an optical component with a light-reflecting cavity, comprising the steps of: processing a first coated component and a second coated component; processing two plates having the same reference surface on the same disc, positioning them using the reference surface, and processing the two plates respectively to obtain a third coated component and a fourth coated component; providing an assembly fixture to position the first coated component and the third coated component, fixing the bottom surface of the third coated component to the surface of the first coated component; positioning the second coated component using the assembly fixture, and bonding the surface of the second coated component to the third coated component and the fourth coated component. This method solves the problem that the processing of optical components in the prior art is difficult to achieve high-standard quality requirements.

Description

Technical Field

[0001] This application relates to the field of optical component processing technology, and more specifically, to a processing method for an optical component having a light-reflecting cavity. Background Technology

[0002] In optical components, optical elements with light-reflecting cavities (such as...) are used. Figure 1 (As shown). The optical component typically has a light-reflecting cavity formed by four sub-plates enclosing a long, narrow cavity. Special shapes are fabricated for specific applications, and the long, narrow cavity transmits light uniformly. The four sub-plates are bonded together using photoresist or adhesive bonding. To meet full-diameter requirements, a metal reflective film or dielectric film is deposited inside, reducing light transmission loss. Different angles or output structures are designed at the product's ends; for example, spatial angles are added to the left and right sides of one end of the light-reflecting cavity to control the light path and angle.

[0003] Currently, optical components with light-reflecting cavities are typically achieved using metal parts or optical guide rods. However, metal parts are prone to warping during machining, making it difficult to achieve nanometer-level flatness; angle control is also challenging, making it difficult to achieve second-level precision. Furthermore, achieving high-standard quality in the parallelism of spatial angles during the machining of optical guide rods is difficult.

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

[0005] The purpose of this application is to provide a method for processing optical components with light-reflecting cavities, which solves the problem that the processing of optical components in the prior art is difficult to meet high-standard quality requirements.

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

[0007] This application provides a method for processing an optical component with a light-reflecting cavity, comprising the following steps:

[0008] A first coated part and a second coated part are obtained through processing, wherein the first coated part has a first coated surface and the second coated part has a second coated surface;

[0009] Two plates with the same reference surface are obtained by processing on the same plate. The reference surface is used for positioning. The two plates are processed to obtain a third coated part and a fourth coated part. The third coated part has a first spatial angle and a third coated surface, and the fourth coated part has a second spatial angle and a fourth coated surface. The angle difference between the surfaces of the third coated part and the fourth coated part is not greater than a predetermined angle value, and the length dimension tolerance is not greater than a predetermined tolerance value.

[0010] An assembly fixture is provided to position the first coated part and the third coated part respectively. The angle of the third coated part is adjusted to a preset angle by a comparator and the image of the first spatial angle is recorded. The bottom surface of the third coated part is fixed on the surface where the first coated surface of the first coated part is located.

[0011] The fourth coated part is positioned by the assembly tooling, and the fourth coated part is adjusted according to the image of the second spatial angle in the comparator so that the image of the second spatial angle in the comparator and the image of the first spatial angle are within the predetermined value in terms of vertical and horizontal image deviation. The fourth coated part is then bonded to the surface of the first coated surface of the first coated part.

[0012] The second coated part is positioned using assembly fixtures, and the surface of the second coated part containing the second coated surface is bonded to the third and fourth coated parts.

[0013] In an optional embodiment, the steps of processing two plates with the same reference surface obtained by machining on the same disc, positioning them using the reference surface, and processing the two plates respectively to obtain the third coated part and the fourth coated part specifically include:

[0014] Two blanks are provided and referenced on the same light-coating disc to obtain a plate with the same reference surface, wherein the angle between the surfaces of a single plate is within a predetermined reference value and a predetermined machining allowance is reserved.

[0015] After positioning with a reference plane, the individual plate is structurally processed and then polished to obtain the third optical component. The angle difference between the surfaces of the third optical component is not greater than a predetermined angle value, and the length dimension tolerance is not greater than a predetermined tolerance value.

[0016] A coating is applied to the inner surface of the third optical component to obtain the third coated component;

[0017] After positioning with a reference plane, another single plate is structurally processed and polished to obtain a fourth optical component, wherein the angle difference between the surfaces of the fourth optical component is not greater than a predetermined angle value and the length dimension tolerance is not greater than a predetermined tolerance value.

[0018] The inner surface of the fourth optical component is coated to obtain the fourth coated component.

[0019] In an optional embodiment, in the step of providing an assembly fixture to position the first coated part and the third coated part respectively through the assembly fixture:

[0020] An assembly fixture is provided, which has mutually perpendicular end positioning surfaces, side positioning surfaces and bottom positioning surfaces;

[0021] The first coated part is positioned by abutting against the end positioning surface, the side positioning surface and the bottom positioning surface, with the first coated surface facing upwards;

[0022] The outer surface of the third coated part is brought into contact with the side positioning surface, and the angle is adjusted to a preset angle by a comparator and the image of the first spatial angle is recorded. The bottom surface of the third coated part is then bonded to the surface where the first coated surface of the first coated part is located.

[0023] In an optional embodiment, the steps of abutting the outer surface of the third coated part against the side positioning surface, adjusting the angle to a preset angle using a comparator and recording the image of the first spatial angle, and then bonding the bottom surface of the third coated part to the surface where the first coated surface of the first coated part is located are as follows:

[0024] The outer surface of the third coated part is brought into contact with the side positioning surface, and adhesive is applied to the bottom surface of the third coated part and the surface where the first coated surface of the first coated part is located.

[0025] The assembly fixture is placed on the comparator platform, and the angles of the first and third coated parts are adjusted to coincide with the zero point of the comparator. The comparator is calibrated and zeroed beforehand using a standard block with a preset angle.

[0026] The first and third coated parts are fixed by photopolymerization.

[0027] In an optional embodiment, the step of adjusting the angle to a preset angle using a comparator and recording the image of the first spatial angle further includes:

[0028] The image of the first spatial angle of the fixed third coated part is found by the comparator, and the comparator is adjusted to zero according to the image of the first spatial angle.

[0029] In an optional embodiment, the steps of abutting the outer surface of the third coated part against the side positioning surface, adjusting the angle to a preset angle using a comparator and recording the image of the first spatial angle, and then bonding the bottom surface of the third coated part to the surface where the first coated surface of the first coated part is located, further include:

[0030] A parallel optical plate is disposed on the inclined surface of the first spatial angle, wherein the opposing parallel surfaces of the parallel optical plate are polished surfaces, and the inclined surface of the first spatial angle is a frosted surface.

[0031] In an optional embodiment, in the steps of positioning the fourth coated part using an assembly fixture, adjusting the fourth coated part according to the image of the second spatial angle in the comparator so that the image of the second spatial angle in the comparator deviates from the image of the first spatial angle in the vertical and horizontal directions within a predetermined value, and fixing the fourth coated part to the surface on which the first coated surface of the first coated part is located:

[0032] The outer surface of the fourth coated part is brought into contact with the side positioning surface of the assembly tool, and adhesive is applied to the bottom surface of the fourth coated part and the surface where the first coated surface of the first coated part is located.

[0033] The fourth coated part is adjusted according to the image of the second spatial angle in the comparator so that the image of the second spatial angle in the comparator and the image of the first spatial angle have image deviations within a predetermined value in the vertical and horizontal directions.

[0034] The fourth coated part is bonded to the surface of the first coated part by photocuring.

[0035] In an optional embodiment, the steps of positioning the fourth coated part using an assembly fixture, adjusting the fourth coated part according to the image of the second spatial angle in the comparator so that the image of the second spatial angle in the comparator deviates from the image of the first spatial angle in the vertical and horizontal directions within a predetermined value, and bonding the fourth coated part to the surface of the first coated part further include:

[0036] A parallel optical plate is set on the inclined surface of the second spatial angle, wherein the opposing parallel surfaces of the parallel optical plate are polished surfaces, and the inclined surface of the second spatial angle is a frosted surface.

[0037] In an optional embodiment, in the steps where the angle difference between the surfaces of the third and fourth coated parts is not greater than a predetermined angle value and the length tolerance is not greater than a predetermined tolerance value:

[0038] The predetermined angle value must be at least half of the standard tolerance angle value required for the final product quality.

[0039] The predetermined tolerance value is one-quarter of the standard tolerance value required for the final product quality.

[0040] In an optional embodiment, the first coated part and the second coated part are obtained by processing, wherein the first coated part has a first coated surface and the second coated part has a second coated surface.

[0041] Two blanks are provided. The top and bottom surfaces of the blanks are polished to meet the predetermined rough polishing standard to obtain a rough-machined blank.

[0042] By using ring polishing to refine the top and bottom surfaces of the rough-machined blank, the surface shapes of the top and bottom surfaces of the rough-machined blank reach the predetermined polishing standards.

[0043] The top surface of a rough-machined blank after fine finishing is coated and shaped to obtain the first coated part;

[0044] The bottom surface of another rough-machined blank is coated and shaped to obtain a second coated part.

[0045] The beneficial effects of the processing method for an optical component with a light-reflecting cavity provided in this application are at least as follows: By processing a first coated component, a second coated component, a third coated component, and a fourth coated component, and then bonding and fixing these components together, the first coated surface, the second coated surface, the third coated surface, and the fourth coated surface form a light-reflecting cavity. Since the inner wall surface of the light-reflecting cavity is entirely coated, it has excellent reflective performance, with a reflectivity as high as 90%. During the processing, the third coated component and the fourth coated component are processed using a co-processing method, ensuring that the processing of the third coated component and the fourth coated component has the same reference plane. Using this reference plane for positioning, the processing errors of the third coated component and the fourth coated component are small. Furthermore, the first spatial angle of the third coated component and the second spatial angle of the fourth coated component maintain good consistency during processing. Additionally, the angle difference between the surfaces of the third coated component and the fourth coated component is not greater than a predetermined angle value, and the length tolerance is not greater than a predetermined tolerance value. This ensures high quality and precision for the third and fourth coated parts during processing. Furthermore, during the bonding and assembly process, positioning is achieved using assembly fixtures, ensuring consistent positioning standards for each coated part. Assembly is conducted with the assistance of a comparator. The comparator first adjusts the first spatial angle using a standard block and records its image. Then, using this image as a reference, the second spatial angle of the fourth coated part is adjusted, ensuring that the image of the second spatial angle is within predetermined values ​​in both vertical and horizontal orientations. This not only guarantees that the angles after bonding and assembly meet second-level standards and the flatness of each surface reaches the nanometer level, but also ensures that the parallelism between the first and second spatial angles is within 5′. This reduces the processing difficulty of optical components with light-reflecting cavities, improves product quality, and enables optical components with light-reflecting cavities to meet high quality standards. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 A schematic diagram of the structure of an optical component with a light-reflecting cavity provided in an embodiment of this application;

[0048] Figure 2 A flowchart illustrating the main steps of a method for fabricating an optical component with a light-reflecting cavity, as provided in an embodiment of this application.

[0049] Figure 3An exploded view of an optical component with a light-reflecting cavity provided in an embodiment of this application;

[0050] Figure 4 A flowchart illustrating the detailed steps of step S100 in a method for processing an optical component with a light-reflecting cavity, as provided in an embodiment of this application.

[0051] Figure 5 A flowchart illustrating the detailed steps of step S200 in a method for processing an optical component with a light-reflecting cavity, as provided in an embodiment of this application.

[0052] Figure 6 A schematic diagram of the assembly tooling used in a processing method for an optical component with a light-reflecting cavity, provided in an embodiment of this application;

[0053] Figure 7 A flowchart illustrating the detailed steps of step S300 in a method for processing an optical component with a light-reflecting cavity, as provided in an embodiment of this application.

[0054] Figure 8 This is a schematic diagram of a method for processing an optical component with a light-reflecting cavity according to an embodiment of the present application, which uses an assembly fixture to assemble a first coated component and a third coated component.

[0055] Figure 9 This is a schematic diagram of a method for processing an optical component with a light-reflecting cavity according to an embodiment of this application, which uses an assembly fixture to assemble a fourth coated component.

[0056] Figure 10 This is a schematic diagram illustrating another method of assembling a third coated part and a fourth coated part using an assembly fixture in a processing method for an optical component with a light-reflecting cavity, as provided in an embodiment of this application.

[0057] Figure 11 A flowchart illustrating the detailed steps of step S400 in a method for processing an optical component with a light-reflecting cavity, as provided in an embodiment of this application.

[0058] Figure 12 This is a schematic diagram of a method for processing an optical component with a light-reflecting cavity according to an embodiment of this application, which uses an assembly fixture to assemble a second coated component.

[0059] The following are the labeling elements in the figure:

[0060] 100. First coated component; 101. Light-reflecting inner cavity; 200. Second coated component; 201. Beveled opening; 300. Third coated component; 310. First spatial angle; 400. Fourth coated component; 410. Second spatial angle; 500. Assembly fixture; 510. Positioning plate; 511. Bottom positioning surface; 520. Cuboid positioning block; 521. Side positioning surface; 530. Square brick positioning block; 531. End positioning surface; 600. Parallel optical sheet. Detailed Implementation

[0061] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0062] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0063] The following is an explanation of the names used in this application:

[0064] Surface shape: PV (Peak to Valley), also known as peak-to-valley value, is a common indicator of the surface shape quality of optical surfaces. It refers to the height difference between the highest and lowest points within a sampling range (based on 2D contour lines or 3D data maps), after removing the reference surface. PV values ​​are expressed in physical length units, and their meaning is easy to understand. Based on the required reference surface, the maximum deviation range of all pixels directly reflects the current processing quality of the optical surface. Based on long-term experience in optical testing, PV values ​​and another important surface shape indicator, RMS, often maintain a certain proportional relationship, generally around 2:1.

[0065] Gluing: A method of bonding surfaces together by applying adhesive.

[0066] In existing technologies, the processing of optical components with light-reflecting cavities not only struggles to meet high quality standards but also suffers from long processing times and difficulties in controlling edge chipping. Therefore, the following embodiments provide a processing method for optical components with light-reflecting cavities. This method can meet the high-precision requirements of optical components with light-reflecting cavities: achieving angular accuracy at the second level, surface flatness at the nanometer level, and parallelism between the first and second spatial angles within 5′. Furthermore, it optimizes the processing, controlling edge chipping during manufacturing. Specific embodiments are as follows:

[0067] Please see Figure 1 , Figure 2 This embodiment proposes a method for fabricating an optical component with a light-reflecting cavity. The method involves fabricating individual coated components and then bonding and assembling them to form the final product. The specific structure of the final optical component with a light-reflecting cavity is as follows:

[0068] Please see Figure 1 , Figure 3 The optical component product with a light-reflecting cavity is composed of four coated components. The first coated component 100 is located at the bottom, the second coated component 200 at the top, and the third coated component 300 and the fourth coated component 400 are located on the left and right sides, respectively. The first coated component 100 has a first coated surface on its upper surface, the second coated component 200 has a second coated surface on its lower surface, the third coated component 300 has a third coated surface on its left side, and the fourth coated component 400 has a fourth coated surface on its right side. These coated surfaces together form a light-reflecting cavity 101 with reflective capabilities. Angled openings 201 are provided at both the front and rear ends of the first coated component 100 and the second coated component 200, allowing optical elements to be mounted to meet the product's optical path requirements. Spatial angles (first spatial angle 310 and second spatial angle 410) are respectively provided at the same end in the front and rear directions of the third and fourth coating surfaces. That is, the front side not only forms a predetermined tilt angle with the upper and lower surfaces, but also forms a tilt angle with the left and right side surfaces. Therefore, the angle formed by the front side is used as the spatial angle (for the convenience of structural description, the front side of the third coating part 300 and the fourth coating part 400 is represented by the spatial angle). When the product is assembled, the accuracy requirement of the first spatial angle 310 on the third coating part 300 and the second spatial angle 410 on the fourth coating part 400 is parallelism ≤ 10′ (the standard tolerance angle value of the final product quality requirement). The side where the spatial angle is located (the front side) can be a frosted surface, which facilitates the bonding of optical components. No residual glue is allowed between the internal adhesive surfaces of the light reflection cavity 101 (gluing or bonding is acceptable), and the amount of chipping should be controlled to ≤0.05mm; the overall size of the bonded optical component should be ±0.02mm of the theoretical value (the standard tolerance value for the final product quality requirements).

[0069] To achieve the high-precision requirements of the aforementioned optical component processing, the blank is processed to obtain the corresponding coated part. The blank can be a hexahedral blank plate, made of quartz material (optical glass). For ease of structural description, the six sides of the blank plate are: front and rear face, upper and lower surface, left and right face. In the coated part, the side of the left or right face that faces away from the coating surface is the outer surface. Furthermore, since the parts produced in subsequent processing are all based on the blank plate, the structural description of each surface on the part is based on the surfaces of the blank plate. Therefore, although the parts in each process are different, the surface numbers at the same location are the same.

[0070] Please see Figure 2 The processing method of the optical component with a light-reflecting cavity in this embodiment mainly includes the following steps:

[0071] Step S100: A first coated part and a second coated part are obtained through processing, wherein the first coated part has a first coated surface and the second coated part has a second coated surface.

[0072] Please see Figure 1 , Figure 3 In the specific process, the first coated component 100 is located at the bottom of the overall optical component product. Therefore, the top and bottom surfaces of the first coated component 100 are polished surfaces with a chamfer of C6±0.2, used for the final assembly of the overall optical component product onto the equipment, while the remaining edges are chamfered to C0.3+0.3. A coating layer is applied to the top surface, thus forming the first coated surface. The second coated component 200 is made of quartz material and is located at the top of the overall optical component product. Therefore, the top and bottom surfaces of the second coated component 200 are polished surfaces with a chamfer of C6±0.2, used for the final assembly of the overall optical component product onto the equipment, while the remaining edges are chamfered to C0.3+0.3. A coating layer is applied to the bottom surface, thus forming the second coated surface.

[0073] Please see Figure 1 , Figure 4 Step S100 specifically includes the following steps:

[0074] Step S110: Provide two blanks, polish the top and bottom surfaces of the blanks to achieve the predetermined rough polishing standard, and obtain the rough-machined blank.

[0075] In the specific process, the blank can be the aforementioned blank plate, with machining allowances. First, the top and bottom surfaces are polished using rough polishing parameters for rapid polishing. The top and bottom surfaces are polished first until the surface shape PV < λ / 4 @ 633nm; this can improve processing efficiency.

[0076] Step S120: Perform fine finishing on the top and bottom surfaces of the rough-machined blank by ring polishing, so that the surface shape of the top and bottom surfaces of the rough-machined blank meets the predetermined polishing standard.

[0077] In the specific process, the rough-machined blank is polished by ring polishing single piece to make the surface shape of the top and bottom surfaces meet the predetermined polishing standards. The predetermined polishing standards are: surface shape PV < λ / 10 @ 633nm, parallelism between the top and bottom surfaces < 10″, and the angle relationship between the other surfaces ≤ 20″.

[0078] The above processing procedure involves processing two blanks separately. The two blanks are used to process the first coated part and the second coated part, respectively. The processing requirements for the first coated part and the second coated part are the same.

[0079] Step S130: Coating is performed on the top surface of a rough-machined blank after fine finishing, and the shape is processed to obtain the first coated part.

[0080] Step S140: Coating is performed on the bottom surface of another rough-machined blank after fine finishing, and the shape is processed to obtain the second coated part.

[0081] Please see Figure 1 , Figure 3 In the specific process, a coating system is applied to form a first coated part 100 and a second coated part 200. The first coated part 100 is coated on its upper surface, while the second coated part 200 is coated on its bottom surface. The diameter of the coated surface is 5mm inward from each of the left and right edges. The 5mm area on the left edge facing right can be left uncoated, and the same applies to the right side. Since the product is coated on a fixture, a certain area will not be coated, which is used for fixture positioning, and a machining allowance is left on one side. This machining allowance area is also considered an uncoated area.

[0082] After coating, shaping is required. For example, the machining allowance on the left and right sides needs to be removed, and C6 chamfers need to be machined at the front and rear ends. The chipping needs to be controlled within 0.05mm. At this time, the protective glass needs to be bonded to the first coating surface (second coating surface). When bonding the protective glass, one end should be aligned with the other end, and the machining allowance should be smaller than the part size. The product is then coated with a light adhesive and polished, requiring at least 0.05mm to be removed, thus obtaining the first coated part 100 and the second coated part 200 that meet the chipping allowance.

[0083] Please see Figure 1 , Figure 5Step S200: Two plates with the same reference surface are obtained by processing on the same plate. The plates are positioned by the reference surface and processed to obtain a third coated part and a fourth coated part. The third coated part has a first spatial angle and a third coated surface, and the fourth coated part has a second spatial angle and a fourth coated surface. The angle difference between the surfaces of the third coated part and the fourth coated part is not greater than a predetermined angle value, and the length dimension tolerance is not greater than a predetermined tolerance value.

[0084] Please see Figure 1 , Figure 3 In practice, since the spatial angles are tilted in both directions (a spatial angle is an angle in both directions of the product), the key to the product lies in controlling the angle of the tilted surface where the spatial angles are located, especially the parallelism between the first spatial angle 310 (on the tilted surface) of the third coated part 300 and the second spatial angle 410 (on the tilted surface) of the fourth coated part 400. Based on the calculation that the parallelism between the right third coated part 300 and the left fourth coated part 400 after gluing and fixing is 10′, the angles of each individual part are ±5′ of the theoretical value, requiring a reduction of half. Therefore, the precision requirements for the spatial angles on each coated part are even higher.

[0085] Therefore, by processing the third coated part 300 and the fourth coated part 400 on the same disc, the processing of the third coated part 300 and the fourth coated part 400 has the same reference surface. Positioned using this reference surface, the third coated part 300 and the fourth coated part 400 are processed separately, resulting in small processing errors. This helps to ensure the dimensional accuracy between the third coated part 300 and the fourth coated part 400 after processing. The angle difference between the surfaces of the third coated part 300 (fourth coated part 400) is not greater than a predetermined angle value. In this embodiment, the predetermined angle value is at least half of the standard tolerance angle value required for the final product quality. The length dimensional tolerance between the surfaces of the third coated part 300 (fourth coated part 400) is not greater than a predetermined tolerance value, which is one-quarter of the standard tolerance value required for the final product quality.

[0086] For example, the standard tolerance angle value for the final product quality requirement is parallelism ≤10′; therefore, the final control of the angle between product surfaces should be ≤5′. The two linear angle values ​​should be within ±5′, and the theoretical linear value of the product is processed according to the actual angle. Since the product is a spatial angle, the dimensions between product points affected by the angle need to be confirmed based on the longitudinal removal allowance and the angle relationship. Since the standard tolerance value for the final product quality requirement is ±0.02mm, the predetermined tolerance value for a single coated part can be controlled according to ±0.005mm to control the product size requirements.

[0087] Please see Figure 2 , Figure 5 Step S200 specifically includes the following steps:

[0088] Step S210: Provide two blanks and perform reference machining on the same light adhesive disc to obtain a plate with the same reference surface, wherein the angle between the surfaces of a single plate is within a predetermined reference value and a predetermined machining allowance is reserved.

[0089] In the specific process, before constructing the structure, the accuracy of the reference surface is ensured by controlling the reference, thereby minimizing the influence of the reference on the dimensions. Therefore, long strip blanks are used for reference machining. During the machining process, two blanks are required to be machined on the same machining disk to obtain a plate with the same reference surface. The tolerance of the angle between the reference surface and all surfaces is required to be within 20″, that is, the perpendicular and parallel angle values ​​between all surfaces of the plate obtained after machining are required to be within 20″. The obtained plate also has a machining allowance of 0.25 to 1 mm. Since the reference surfaces of the third coating surface and the fourth coating surface are machined on the same disk, this step provides a guarantee that the product achieves the theoretical dimensional value of ±0.005 mm.

[0090] Step S220: After positioning with a reference plane, perform structural processing on a single plate and then polish it to obtain a third optical component. The angle difference between the surfaces of the third optical component is not greater than a predetermined angle value, and the length dimension tolerance is not greater than a predetermined tolerance value.

[0091] Step S230: Coating the inner surface of the third optical component to obtain the third coated component.

[0092] Step S240: After positioning with a reference plane, another single plate is structurally processed and polished to obtain a fourth optical component, wherein the angle difference between the surfaces of the fourth optical component is not greater than a predetermined angle value and the length dimension tolerance is not greater than a predetermined tolerance value.

[0093] Step S250: Coating the inner surface of the fourth optical component to obtain the fourth coated component.

[0094] Then, structural processing is performed to machine the various surfaces of the third coated part (fourth coated part) and the inclined surface where the first spatial angle (second spatial angle) is located. Next, the product is polished, and finally, the angle between the surfaces of the third coated part (fourth coated part) is controlled to be ≤5′, with two linear angle values ​​required to be within ±5′; the angle between perpendicular or parallel surfaces can be ≤20″, thus controlling the angle between the lines on two surfaces of the product to be within ±5′.

[0095] Finally, a coating is applied to the inner surface (left side) of the third coated part, with a coating aperture of 3mm inward from the edge; a coating is also applied to the inner surface (right side) of the fourth coated part, with a coating aperture of 3mm inward from the edge. The coated surfaces of the third and fourth coated parts undergo a coating overlap removal process (uncoated areas) until there is no overlap in the coated areas, achieving full-diameter coating.

[0096] Please see Figure 2 , Figure 7 Step S300: Provide an assembly fixture, position the first coated part and the third coated part respectively through the assembly fixture, adjust the angle of the third coated part to a preset angle through a comparator and record the image of the first spatial angle, and fix the bottom surface of the third coated part to the surface where the first coated surface of the first coated part is located.

[0097] Please see Figure 6 , Figure 12 In the specific process, an assembly fixture 500 is designed for positioning when bonding various coated parts, ensuring that the angle between the surfaces of the assembly fixture 500 is controlled within 20″. The assembly fixture 500 specifically includes: a positioning plate 510, a cuboid positioning block 520, and a square brick positioning block 530. The upper surface of the positioning plate 510 is the bottom positioning surface 511, the cuboid positioning block 520 is fixed on the upper surface of the positioning plate 510, and the left and right sides of the cuboid positioning block 520 serve as the side positioning surfaces 521. Two square brick positioning blocks 530 can be provided, with the two square brick positioning blocks 530 located on the left and right sides of the cuboid positioning block 520 respectively, and fixed to the upper surface of the positioning plate 510. The two square brick positioning blocks 530 can be located at the front and rear ends of the cuboid positioning block 520 respectively, and the facing end faces of the two square brick positioning blocks 530 serve as end positioning surfaces 531. This makes the end positioning surface 531, the side positioning surface 521, and the bottom positioning surface 511 perpendicular to each other, and the angle between the surfaces is controlled within 20″. Due to the high precision requirements between the positioning surfaces of the assembly fixture 500, high-precision positioning and assembly of each coated part is ensured.

[0098] The various coated parts can be fixed by gluing or photopolymerization. In this embodiment, gluing followed by photopolymerization is used for fixing. The gluing method will be described in detail.

[0099] Please see Figure 6 , Figure 8Place the outer surface of the third coated part 300 (located on the right side) tightly against the side positioning surface 521 of the assembly fixture 500. Apply adhesive to the bottom surface of the third coated part 300 and the top surface (first coated surface) of the first coated part 100. Simultaneously, adjust the comparator to the correct angle using a standard block for the theoretical angle (the theoretical angle is the angle designed in the drawing, e.g., 45.86°). Zero the comparator. Place the assembly fixture 500 and the assembly of the first coated part 100 and the third coated part 300 on the comparator platform and adjust the angle until it coincides with the zero point. This means that the angle between the third coated part 300 and the first coated part 100 (e.g., the first spatial angle 310°) is adjusted to meet the requirements of the drawing. Apply UV adhesive and allow it to cure.

[0100] Please see Figure 1 , Figure 7 Therefore, step S300 in this embodiment specifically includes:

[0101] Step S310: Provide an assembly fixture, which has mutually perpendicular end positioning surfaces, side positioning surfaces and bottom positioning surfaces.

[0102] Step S320: Position the first coated part against the end positioning surface, the side positioning surface and the bottom positioning surface, so that the first coated surface faces upward.

[0103] In the specific process, the first coated part located below is placed on the bonding fixture, and the bottom surface of the first coated part is pressed against the bottom positioning surface of the fixture.

[0104] Step S330: Abut the outer surface of the third coated part against the side positioning surface, adjust the angle to a preset angle using a comparator and record the image of the first spatial angle, and then attach the bottom surface of the third coated part to the surface where the first coated surface of the first coated part is located.

[0105] Please see Figure 6 , Figure 8 The outer surface of the third coated part is abutted against the side positioning surface, and adhesive is applied to the bottom surface of the third coated part and the first coated surface of the first coated part. The assembly fixture is placed on the comparator platform, and the angles of the first and third coated parts are adjusted to coincide with the zero point of the comparator. The comparator is pre-calibrated and zeroed using a standard block with a preset angle. For ease of inspection, the theoretical angle value of the part is 45.86°, and the machining is also based on 45.86°. Similarly, during inspection, the comparator is first set to zero, or a zero point is set. Placing the part on the equipment then allows observation of the deviation from the set zero point, thus understanding the actual machining situation of the product. Adjustments are then made based on the deviation, such as adjusting to coincide with the zero point, thereby ensuring that the assembled first and third coated parts meet the theoretical angle requirements of the design drawings.

[0106] Please see Figure 10 It should be noted that if the inclined surface (front side) of the first spatial angle is frosted, an image cannot be seen on the comparator, requiring a polishing medium to ensure angle detection. Therefore, a parallel optical plate 600 needs to be placed on the inclined surface of the first spatial angle. The opposite parallel surfaces of the parallel optical plate 600 are polished. Then, the image of the first spatial angle of the third coated part with the parallel optical plate attached can be found on the comparator. Since the inclination of the front surface of the parallel optical plate is consistent with the inclination of the inclined surface of the spatial angle, the image of the front surface of the parallel optical plate is taken as the image of the first spatial angle. The parallelism between the front and rear surfaces of the parallel optical plate is <5″ to reduce the influence of assembly tolerances, thereby ensuring high-precision detection results.

[0107] Furthermore, during the process of adjusting the angle to a preset angle and recording the image of the first spatial angle using a comparator, the comparator finds the image of the first spatial angle of the fixed third coated part and adjusts the comparator to zero based on this image. This zero point is the current location of the image of the first spatial angle, thus achieving the function of recording the image of the first spatial angle. Subsequent comparisons with the zero point are equivalent to comparisons with the image of the first spatial angle. Because the parallel or perpendicular bonding of parts directly affects the originally zeroed angle value, resetting the zero point makes the detection process more accurate, resulting in higher precision in the assembled product.

[0108] Step S340: Fix the first coated part and the third coated part by photocuring.

[0109] Finally, ultraviolet light is used to irradiate the upper right edge of the first coated part and the ultraviolet adhesive on the bottom surface of the third coated part to cure them, thereby fixing the first coated part and the third coated part in place.

[0110] Please see Figure 1 , Figure 11 Step S400: Position the fourth coated part using the assembly fixture, adjust the fourth coated part according to the image of the second spatial angle in the comparator, so that the image deviation between the image of the second spatial angle and the image of the first spatial angle in the comparator is within a predetermined value in the vertical and horizontal directions, and then bond the fourth coated part to the surface of the first coated part.

[0111] Please see Figure 9 In the specific process, the outer surface of the fourth coating component 400 abuts against the side positioning surface 521, and the image of the fourth coating component 400 in the comparator (especially the inclined surface corresponding to the second spatial angle 410) is observed. The fourth coating component 400 is finely adjusted so that the image of the fourth coating component 400 in the comparator and the image of the third coating component 300 have vertical and horizontal image deviations within a predetermined value, such as 1′.

[0112] Please see Figure 1 , Figure 11 Step S400 specifically includes the following steps:

[0113] Step S410: Place the outer surface of the fourth coated part against the side positioning surface of the assembly fixture, and apply adhesive to the bottom surface of the fourth coated part and the surface where the first coated surface of the first coated part is located.

[0114] During the mating process, to facilitate inspection, the fourth coated part can be placed on the side positioning surface on the other side of the cuboid positioning block in the left-right direction, and positioned at one end by the square brick positioning block on that side, which makes assembly more convenient.

[0115] Step S420: Adjust the fourth coated part according to the image of the second spatial angle in the comparator so that the image of the second spatial angle in the comparator and the image of the first spatial angle have image deviations in the vertical and horizontal directions within a predetermined value.

[0116] Since the image of the third coated part at the first spatial angle was recorded as a standard in the previous steps by setting a zero point in the comparator, the fourth coated part needs to be adjusted according to the relative position of the image of the fourth coated part at the second spatial angle in the comparator and the zero point. This ensures that the image deviation of the fourth coated part from the zero point in both vertical and horizontal directions is less than 1′, thus meeting the quality requirements.

[0117] Please see Figure 10 It should be noted that if the inclined surface (front side) of the second spatial angle is a frosted surface, a parallel optical plate 600 is set on the inclined surface of the second spatial angle, wherein the opposite parallel surfaces of the parallel optical plate 600 are polished surfaces, and the inclined surface of the second spatial angle is a frosted surface.

[0118] Step S430: The fourth coated part is bonded to the surface of the first coated part by photocuring.

[0119] Finally, ultraviolet light is used to irradiate the upper left edge of the first coated part and the ultraviolet adhesive on the bottom surface of the fourth coated part to cure them, thereby fixing the first coated part and the fourth coated part in place.

[0120] Please see Figure 1 Step S500: Position the second coated part using an assembly fixture, and bond the second coated surface of the second coated part to the third and fourth coated parts.

[0121] Please see Figure 12The second coating surface (lower surface) of the upper second coating component 200 is placed close to the top surface of the third coating component 300 and the fourth coating component 400. The right side surface of the second coating component 200 is placed close to the side positioning surface 521 of the assembly tool, and the rear end surface is placed close to the end positioning surface 531. Apply UV glue and cure to complete the assembly.

[0122] Through the above process, an optical component product with a light-reflecting cavity is produced, and the parallelism of the spatial angle surfaces on the left and right sides can be controlled to be <5′. At the same time, some parts with beam deflection or other functions can be bonded to the inclined surface of the spatial angle to meet functional requirements.

[0123] In summary, the processing method of an optical component with a light-reflecting cavity provided in this application adopts a coating method on optical glass, which enables the light-reflecting cavity formed by the optical component to achieve a reflectivity of 90%; the flatness of the optical component can be achieved at the nanometer level; the angle requirements on the optical component can be achieved at the second level; the edge chipping can be avoided by bonding protective glass during processing; in particular, the parallelism of the spatial angles on the left and right sides can be achieved within 5′, allowing more parts to be added to the product to achieve more optical performance.

[0124] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for fabricating an optical component with a light-reflecting cavity, characterized in that, Including the following steps: A first coated part and a second coated part are obtained through processing, wherein the first coated part has a first coated surface and the second coated part has a second coated surface; Two plates with the same reference surface are obtained by processing on the same plate. The reference surface is used for positioning. The two plates are processed to obtain a third coated part and a fourth coated part. The third coated part has a first spatial angle and a third coated surface, and the fourth coated part has a second spatial angle and a fourth coated surface. The angle difference between the surfaces of the third coated part and the fourth coated part is not greater than a predetermined angle value, and the length dimension tolerance is not greater than a predetermined tolerance value. An assembly fixture is provided to position the first coated part and the third coated part respectively. The angle of the third coated part is adjusted to a preset angle by a comparator and the image of the first spatial angle is recorded. The bottom surface of the third coated part is fixed on the surface of the first coated surface of the first coated part. The fourth coated part is positioned by the assembly fixture, and the fourth coated part is adjusted according to the image of the second spatial angle in the comparator so that the image of the second spatial angle in the comparator and the image of the first spatial angle are within a predetermined value in terms of vertical and horizontal image deviation. The fourth coated part is then fixed on the surface of the first coated surface of the first coated part. The second coated part is positioned by an assembly fixture, and the surface of the second coated part containing the second coated surface is bonded to the third coated part and the fourth coated part.

2. The method for processing an optical component with a light-reflecting cavity as described in claim 1, characterized in that, The steps of obtaining a third coated part and a fourth coated part by machining two plates with the same reference surface through the same plate, positioning them with the reference surface, and machining the two plates respectively include: Two blanks are provided and referenced on the same light-coating disc to obtain a plate with the same reference surface, wherein the angle between the surfaces of a single plate is within a predetermined reference value and a predetermined machining allowance is left. After positioning with the reference plane, the individual plate is structurally processed and then polished to obtain the third optical component, wherein the angle difference between the surfaces of the third optical component is not greater than a predetermined angle value and the length dimension tolerance is not greater than a predetermined tolerance value. A coating is applied to the inner surface of the third optical element to obtain a third coated element; After positioning with the reference plane, another single plate is structurally processed and polished to obtain a fourth optical component, wherein the angle difference between the surfaces of the fourth optical component is not greater than a predetermined angle value and the length dimension tolerance is not greater than a predetermined tolerance value. The inner surface of the fourth optical element is coated to obtain the fourth coated element.

3. The method for processing an optical component with a light-reflecting cavity as described in claim 2, characterized in that, In the steps of providing an assembly fixture to position the first coated part and the third coated part respectively, adjusting the angle of the third coated part to a preset angle using a comparator and recording the image of the first spatial angle, and fixing the bottom surface of the third coated part onto the surface of the first coated surface of the first coated part: An assembly fixture is provided, the assembly fixture having mutually perpendicular end positioning surfaces, side positioning surfaces and bottom positioning surfaces; The first coated part is positioned by abutting against the end positioning surface, the side positioning surface and the bottom positioning surface, with the first coated surface facing upward; The outer surface of the third coated part is brought into contact with the side positioning surface, and the angle is adjusted to a preset angle by a comparator and the image of the first spatial angle is recorded. The bottom surface of the third coated part is then bonded to the surface where the first coated surface of the first coated part is located.

4. The method for processing an optical component with a light-reflecting cavity as described in claim 3, characterized in that, In the steps of abutting the outer surface of the third coated part against the side positioning surface, adjusting the angle to a preset angle using a comparator and recording the image of the first spatial angle, and then bonding the bottom surface of the third coated part to the surface where the first coated surface of the first coated part is located: The outer surface of the third coated part is brought into contact with the side positioning surface, and adhesive is applied to the bottom surface of the third coated part and the surface where the first coated surface of the first coated part is located. The assembly fixture is placed on the comparator platform, and the angles of the first coated part and the third coated part are adjusted to coincide with the zero point of the comparator. The comparator is calibrated and zeroed in advance using a standard block with a preset angle. The first coated part and the third coated part are fixed by photopolymerization.

5. The method for processing an optical component with a light-reflecting cavity as described in claim 4, characterized in that, The step of adjusting the angle to a preset angle using a comparator and recording the image of the first spatial angle also includes: The image of the first spatial angle of the fixed third coated part is found by the comparator, and the comparator is adjusted to zero according to the image of the first spatial angle.

6. The method for processing an optical component with a light-reflecting cavity as described in claim 3, characterized in that, The steps of abutting the outer surface of the third coated part against the side positioning surface, adjusting the angle to a preset angle using a comparator and recording the image of the first spatial angle, and then bonding the bottom surface of the third coated part to the surface where the first coated surface of the first coated part is located, further include: A parallel optical plate is provided on the inclined surface of the first spatial angle, wherein the opposing parallel surfaces of the parallel optical plate are polished surfaces, and the inclined surface of the first spatial angle is a frosted surface.

7. The method for processing an optical component with a light-reflecting cavity as described in claim 3, characterized in that, In the steps of positioning the fourth coated part using an assembly fixture, adjusting the fourth coated part according to the image of the second spatial angle in the comparator, ensuring that the image of the second spatial angle in the comparator deviates from the image of the first spatial angle in the vertical and horizontal directions within a predetermined value, and fixing the fourth coated part onto the surface of the first coated part: The outer surface of the fourth coated part is brought into contact with the side positioning surface of the assembly tool, and adhesive is applied to the bottom surface of the fourth coated part and the surface where the first coated surface of the first coated part is located. The fourth coated part is adjusted according to the image of the second spatial angle in the comparator so that the image of the second spatial angle in the comparator and the image of the first spatial angle have image deviations within a predetermined value in the vertical and horizontal directions. The fourth coated part is bonded to the surface of the first coated part by photopolymerization.

8. The method for processing an optical component with a light-reflecting cavity as described in claim 7, characterized in that, The steps of positioning the fourth coated part using an assembly fixture, adjusting the fourth coated part according to the image of the second spatial angle in the comparator so that the image of the second spatial angle in the comparator deviates from the image of the first spatial angle in the vertical and horizontal directions within a predetermined value, and then bonding the fourth coated part to the surface of the first coated part, further include: A parallel optical plate is provided on the inclined surface of the second spatial angle, wherein the opposing parallel surfaces of the parallel optical plate are polished surfaces, and the inclined surface of the second spatial angle is a frosted surface.

9. The method for processing an optical component with a light-reflecting cavity as described in claim 1, characterized in that, In the steps where the angle difference between the surfaces of the third and fourth coated parts is not greater than a predetermined angle value and the length tolerance is not greater than a predetermined tolerance value: The predetermined angle value is at least half of the standard tolerance angle value required for the quality of the final product. The predetermined tolerance value is one-quarter of the standard tolerance value required for the final product quality.

10. The method for processing an optical component with a light-reflecting cavity as described in claim 1, characterized in that, In the step of obtaining a first coated part and a second coated part through processing, wherein the first coated part has a first coated surface and the second coated part has a second coated surface: Two blanks are provided. The top and bottom surfaces of the blanks are polished to meet the predetermined rough polishing standard to obtain a rough-machined blank. The top and bottom surfaces of the rough-machined blank are refined by ring polishing, so that the surface shapes of the top and bottom surfaces of the rough-machined blank meet the predetermined polishing standards. The top surface of a rough-machined blank after fine finishing is coated and shaped to obtain the first coated part; The bottom surface of another rough-machined blank is coated and shaped to obtain a second coated part.

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