Processing method of optical piece with light reflection inner cavity

Abstract

The invention provides a processing method of an optical piece with a light reflection inner cavity. The processing method comprises the following steps: obtaining a first film coating piece and a second film coating piece through processing; two plates with the same datum plane are obtained through same-disc machining, the datum plane is used for positioning, and the two plates are machined to obtain a third film-coated part and a fourth film-coated part; an assembly tool is provided, the first film coating piece and the third film coating piece are positioned through the assembly tool, and the bottom face of the third film coating piece is fixed to the surface where the first film coating face of the first film coating piece is located; and positioning the second film coating piece through the assembly tool, and bonding the surface of the second film coating surface of the second film coating piece to the third film coating piece and the fourth film coating piece. The problem that in the prior art, machining of optical parts is difficult to meet the high-standard quality requirement is solved.

Description

Technical Field

[0001] The present application relates to the technical field of optical component processing, and more specifically, to a processing method of an optical component with a light reflecting inner cavity. Background Art

[0002] Among optical parts, optical parts with light-reflecting inner cavities are used (such as Figure 1 As shown). The optical reflective cavity of the optical component is usually surrounded by four sub-boards to form a long cavity. Special shapes are processed for special working conditions. The long cavity transmits uniform light. The four sub-boards are optically glued or glued. The internal full-aperture requirements are met. Metal reflective film or dielectric film is plated. This can reduce light transmission losses. The product end is designed with different angles or different output structures. For example, there are space angles on the left and right sides of one end of the optical reflective cavity to control the light path and angle.

[0003] Currently, metal products or light guide rod products are usually used to achieve the functions of the optical parts with light reflection cavities mentioned above. However, metal products are slender parts, and metal processing is prone to warping, and it is difficult to achieve nanometer-level flatness; angle control is difficult and difficult to achieve seconds. The parallelism of the spatial angle of light guide rod products during processing is difficult to meet high quality standards.

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

[0005] The purpose of the present application is to provide a method for processing an optical component with a light-reflecting inner cavity, which solves the problem in the prior art that it is difficult to achieve high quality requirements in the processing of optical components.

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

[0007] The present application provides a method for processing an optical component having a light reflecting inner cavity, comprising the steps of:

[0008] A first film-coated component and a second film-coated component are obtained by processing, wherein the first film-coated component has a first film-coated surface, and the second film-coated component has a second film-coated surface;

[0009] Two plates having the same reference surface are obtained by processing on the same plate, and the reference surface is used for positioning, and the two plates are processed respectively to obtain a third coated part and a fourth coated part, wherein 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, and 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 tool is provided, and the first coated component and the third coated component are positioned respectively by the assembly tool, and the angle of the third coated component is adjusted to a preset angle by a comparator and an image of the first spatial angle is recorded, and the bottom surface of the third coated component is fixed on the surface where the first coated surface of the first coated component is located;

[0011] Positioning the fourth coated component by means of an assembly tool, adjusting the fourth coated component according to the image of the second spatial angle in the comparator, so that the image deviations of the second spatial angle in the comparator and the image of the first spatial angle in the upper and lower directions and the left and right directions are within a predetermined value, and bonding the fourth coated component to the surface where the first coated surface of the first coated component is located;

[0012] The second film-coated component is positioned by means of an assembly tool, and the surface where the second film-coated surface of the second film-coated component is located is bonded to the third film-coated component and the fourth film-coated component.

[0013] In an optional embodiment, after obtaining two plates having the same reference surface by processing on the same plate, positioning the two plates by using the reference surface, and respectively processing the two plates to obtain the third coated member and the fourth coated member specifically include:

[0014] Providing two blanks for reference processing on the same optical plastic disc to obtain plates with the same reference surface, wherein the angle between the surfaces of a single plate is within a predetermined reference value and a predetermined processing allowance is reserved;

[0015] After positioning with the reference plane, the single plate is subjected to structural processing and then polishing to obtain a 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;

[0016] coating the inner surface of the third optical component to obtain a third coated component;

[0017] After positioning with the reference plane, another single plate is subjected to structural processing and then polishing 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 a fourth coated component.

[0019] In an optional embodiment, in the step of providing an assembly tool and positioning the first coating component and the third coating component respectively by the assembly tool:

[0020] Providing an assembly tool, the assembly tool having an end positioning surface, a side positioning surface and a bottom positioning surface which are perpendicular to each other;

[0021] Positioning the first coating member against the end positioning surface, the side positioning surface, and the bottom positioning surface so that the first coating surface faces upward;

[0022] The outer surface of the third coated part is placed against the side positioning surface, and the angle is adjusted to a preset angle through a comparator and the image of the first spatial angle is recorded, and the bottom surface of the third coated part is bonded to the surface where the first coated surface of the first coated part is located.

[0023] In an optional embodiment, the outer surface of the third coated member is abutted against 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, and the bottom surface of the third coated member is bonded to the surface where the first coated surface of the first coated member is located:

[0024] The outer surface of the third coating part is placed against the side positioning surface, and the bottom surface of the third coating part is glued to the surface where the first coating surface of the first coating part is located;

[0025] Placing the assembly tool on the comparator platform, and adjusting the angles of the first coated part and the third coated part to coincide with the zero point of the comparator, wherein the comparator is calibrated and zeroed in advance using a standard block with a preset angle;

[0026] The first coating member and the third coating member are fixed by photocuring.

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

[0028] The image of the first spatial angle of the fixed third coating component is found through the comparator, and the comparator is adjusted to zero according to the image of the first spatial angle.

[0029] In an optional embodiment, the step of placing the outer surface of the third coated member against the side positioning surface, adjusting the angle to a preset angle through a comparator and recording the image of the first spatial angle, and bonding the bottom surface of the third coated member to the surface where the first coated surface of the first coated member is located further includes:

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

[0031] In an optional embodiment, in the step of positioning the fourth coated component by an assembly tool, adjusting the fourth coated component according to the image of the second spatial angle in the comparator so that the image deviations of the second spatial angle in the comparator and the image of the first spatial angle in the upper and lower directions and the left and right directions are within a predetermined value, and fixing the fourth coated component on the surface where the first coated surface of the first coated component is located:

[0032] The outer surface of the fourth coated part is placed against the side positioning surface of the assembly tool, and glue is dripped on 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 coating member is adjusted according to the image of the second spatial angle in the comparator, so that the image deviations of the second spatial angle in the comparator and the image of the first spatial angle in the upper and lower directions and the left and right directions are within a predetermined value;

[0034] The fourth coating member is bonded to the surface of the first coating member by photocuring.

[0035] In an optional embodiment, after positioning the fourth coated component by the assembly tool, adjusting the fourth coated component according to the image of the second spatial angle in the comparator so that the image deviations of the second spatial angle in the comparator and the image of the first spatial angle in the upper and lower directions and the left and right directions are within a predetermined value, the step of bonding the fourth coated component to the surface where the first coated surface of the first coated component is located further includes:

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

[0037] In an optional embodiment, in the step of ensuring that the angle difference between the surfaces of the third coating part and the fourth coating part is not greater than a predetermined angle value and the length dimension tolerance is not greater than a predetermined tolerance value:

[0038] The predetermined angle value is at least half of the standard tolerance angle value required for the quality of the final product;

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

[0040] In an optional embodiment, in the step of obtaining a first coated component and a second coated component by processing, wherein the first coated component has a first coated surface and the second coated component has a second coated surface:

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

[0042] The top and bottom surfaces of the rough-machined blank are fine-finished by ring polishing a single piece, so that the surface shapes of the top and bottom surfaces of the rough-machined blank meet the predetermined polishing standards;

[0043] Coating a top surface of a rough-machined blank after finishing, and performing shape processing to obtain a first coated part;

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

[0045] The processing method of an optical component with a light-reflecting inner cavity provided by the present application has at least the following beneficial effects: a first coated component, a second coated component, a third coated component and a fourth coated component are obtained by processing, and each coated component is glued and fixed, so that the first coated surface, the second coated surface, the third coated surface and the fourth coated surface surround the light-reflecting inner cavity. Since the inner wall surface of the light-reflecting inner cavity is a coated surface, it has good reflection performance and a reflectivity of up to 90%. During the processing, the third coated component and the fourth coated component are processed by the same plate processing method, so that the processing of the third coated component and the fourth coated component has the same reference plane, and the reference plane is used for positioning. When the third coated component and the fourth coated component are processed separately, the processing errors of the two are small, and the first spatial angle of the third coated component and the second spatial angle of the fourth coated component can maintain relatively good consistency during the processing, and the angle difference between the surfaces of the third coated component and the fourth coated component is not greater than the predetermined angle value, and the length dimension tolerance is not greater than the predetermined tolerance value. Thus, the quality precision of the third and fourth coated parts during the processing is ensured to be high. In addition, during the gluing and assembling process, the assembly tool is used for positioning, so that the standard consistency of the positioning process of each coated part is good, and the assembly is performed under the detection cooperation of the comparator. When the comparator is used, the first spatial angle is first adjusted by the standard block, and the image of the first spatial angle is recorded; then the image of the first spatial angle is used as a reference to adjust the second spatial angle of the fourth coated part, so that the image deviation of the second spatial angle and the image of the first spatial angle in the upper and lower and left and right directions is within the predetermined value, thereby not only ensuring that each angle after gluing and assembling can reach the second level standard, and the flatness of each surface reaches the nanometer level, but also ensuring that the parallelism between the first spatial angle and the second spatial angle can be achieved within 5′, reducing the processing difficulty of the optical part with a light-reflecting inner cavity, improving the product quality, and making the optical part with a light-reflecting inner cavity meet high-standard quality requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

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

[0048] Figure 2 A schematic flow chart of the main steps of a method for processing an optical component with a light reflecting inner cavity provided in an embodiment of the present application;

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

[0050] Figure 4 A schematic flow chart of detailed steps of step S100 of a method for processing an optical component with a light reflecting inner cavity provided in an embodiment of the present application;

[0051] Figure 5 A schematic flow chart of detailed steps of step S200 of a method for processing an optical component with a light reflecting inner cavity provided in an embodiment of the present application;

[0052] Figure 6 A schematic structural diagram of an assembly tool used in a method for processing an optical component with a light reflecting inner cavity provided in an embodiment of the present application;

[0053] Figure 7 A schematic flow chart of detailed steps of step S300 of a method for processing an optical component with a light reflecting inner cavity provided in an embodiment of the present application;

[0054] Figure 8 A schematic structural diagram of assembling a first coating component and a third coating component using an assembly tool in a processing method of an optical component with a light reflecting inner cavity provided in an embodiment of the present application;

[0055] Fig. 9 A schematic structural diagram of assembling a fourth coating component using an assembly tool in a method for processing an optical component with a light reflecting inner cavity provided in an embodiment of the present application;

[0056] Fig.10 A schematic structural diagram of another method of assembling a third coating component and a fourth coating component using an assembly tool in a method for processing an optical component with a light reflecting inner cavity provided in an embodiment of the present application;

[0057] Fig.11 A schematic flow chart of detailed steps of step S400 of a method for processing an optical component with a light reflecting inner cavity provided in an embodiment of the present application;

[0058] Fig.12 A schematic structural diagram of assembling a second coated component using an assembly tool in a method for processing an optical component with a light reflecting inner cavity provided in an embodiment of the present application.

[0059] Among them, the reference numerals in the figure are:

[0060] 100, first coated part; 101, light reflecting inner cavity; 200, second coated part; 201, bevel; 300, third coated part; 310, first spatial angle; 400, fourth coated part; 410, second spatial angle; 500, assembly tool; 510, positioning plate; 511, bottom positioning surface; 520, rectangular positioning block; 521, side positioning surface; 530, square brick positioning block; 531, end positioning surface; 600, parallel optical sheet. DETAILED DESCRIPTION

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

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

[0063] The following is an explanation of the names involved in this application, as follows:

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

[0065] Gluing: A method of applying glue and then fixing the surfaces to be bonded together.

[0066] In the prior art, it is not only difficult to achieve high quality standards during the processing of optical parts with light-reflecting inner cavities, but also there are problems such as long processing time and high difficulty in controlling edge collapse. Therefore, a processing method for optical parts with light-reflecting inner cavities is provided through the following embodiments. This solution can meet the high-precision requirements of optical parts with light-reflecting inner cavities: the angular accuracy of the product reaches the second level standard, the surface flatness reaches the nanometer level standard, and the parallelism between the first spatial angle and the second spatial angle can be within 5'. It can also optimize the processing process so that the edge collapse during the processing can be controlled. The specific embodiments are as follows:

[0067] See also Figure 1 , Figure 2 This embodiment provides a method for processing an optical component with a light-reflecting inner cavity, by processing each coated component and then gluing and assembling them to form a final product. The structure of the final optical component with a light-reflecting inner cavity is as follows:

[0068] See also Figure 1 , Figure 3 The optical component product with a light-reflecting inner cavity is composed of four coated components, wherein the first coated component 100 is at the bottom, the second coated component 200 is 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 upper surface of the corresponding first coated component 100 is provided with a first coated surface, the lower surface of the second coated component 200 is provided with a second coated surface, the left side of the third coated component 300 is provided with a third coated surface, and the right side of the fourth coated component 400 is provided with a fourth coated surface. A light-reflecting inner cavity 101 with reflective ability is surrounded by the coating surfaces; and oblique openings 201 are provided at the front and rear ends of the first coated component 100 and the second coated component 200, and optical elements can be installed through the oblique openings 201 to meet the product optical path requirements. Space angles (first space angle 310, second space angle 410) are respectively arranged at the same end of the third coating surface and the fourth coating surface in the front-to-back direction, that is, the front end side surface not only forms a predetermined inclination angle with the upper and lower surfaces, but also forms an inclination angle with the left and right side surfaces. Therefore, the angle formed by the front end side surfaces is used as the space angle (for the convenience of structural description, the front end sides of the third coating component 300 and the fourth coating component 400 are represented by space angles). After the product is assembled, the accuracy requirement of the first space angle 310 on the third coating component 300 and the second space angle 410 on the fourth coating component 400 is parallelism ≤10′ (the standard tolerance angle value required for the quality of the final product), and the side surface where the space angle is located (front end side surface) can be a frosted surface, which is convenient for bonding optical components. No residual glue is allowed between the internal bonding surfaces of the light reflecting inner cavity 101 (it can be light glue or bonding), and the edge chipping is controlled to be ≤0.05mm; the overall size of the optical component after bonding is required to be ±0.02mm of the theoretical value (the standard tolerance value required for the quality of the final product).

[0069] In order to achieve the high-precision requirements for the processing of the above-mentioned optical parts. The blank is processed to obtain the corresponding coated parts. The blank can be a hexahedral blank plate, and a quartz material plate (optical glass) is used. For the convenience of structural description, the six faces of the blank are: the front face and the rear face, the upper surface and the lower surface, the left side and the right side. Among them, the left side or the right side of the coated part facing away from the coated surface is the outer surface. In addition, since the parts produced in the subsequent processing process are all produced on the basis of the blank plate, the structural description of each surface on the part is made with reference to the surfaces of the blank plate. Therefore, although the parts in each process are different, the labels of the surfaces at the same position are the same.

[0070] See also Figure 2 In this embodiment, the processing method of the optical component with a light reflecting inner cavity mainly includes the following steps:

[0071] Step S100: obtaining a first coated component and a second coated component by processing, wherein the first coated component has a first coated surface, and the second coated component has a second coated surface.

[0072] See also Figure 1 , Figure 3 In the specific process, the first coating component 100 is located at the bottom of the overall optical product. Therefore, the top and bottom surfaces of the first coating component 100 are polished surfaces with a chamfer of C6±0.2, which is used for the final overall optical product to be assembled on the equipment, and the other edges are chamfered C0.3+0.3. The top surface is covered with a coating layer to form a first coating surface. The second coating component 200 is made of a quartz material plate and is located at the top of the overall optical product. Therefore, the top and bottom surfaces of the second coating component 200 are polished surfaces with a chamfer of C6±0.2, which is used for the final overall optical product to be assembled on the equipment, and the other edges are chamfered C0.3+0.3. The bottom surface is covered with a coating layer to form a second coating surface.

[0073] See also Figure 1 , Figure 4 In step S100, the following steps are specifically included:

[0074] Step S110, providing two blanks, polishing the top and bottom surfaces of the blanks to reach a predetermined rough polishing standard, and obtaining a rough-machined blank.

[0075] In the specific process, the blank can be the blank plate mentioned above, with some processing reserved. The top and bottom surfaces are first polished, and the rough polishing parameters are used for rapid polishing. The top and bottom surfaces are polished first, and the surface shape PV<λ / 4@633nm is polished to improve the processing efficiency.

[0076] Step S120, fine-finishing the top and bottom surfaces of the rough-machined blank by ring polishing, so that the surface shapes of the top and bottom surfaces of the rough-machined blank meet the predetermined polishing standard.

[0077] In the specific process, the rough-machined blank is fine-finished using a ring polishing single piece so that the surface shapes of the top and bottom surfaces meet the predetermined polishing standards, where the predetermined polishing standards are: surface shape PV<λ / 10@633nm, the parallelism of the top and bottom surfaces is <10″, and the angle relationship between the other surfaces is ≤20″.

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

[0079] Step S130, coating the top surface of a rough-machined blank after fine processing, and performing shape processing to obtain a first coated part.

[0080] Step S140, coating the bottom surface of another rough-machined blank after fine processing, and performing shape processing to obtain a second coated part.

[0081] See also Figure 1 , Figure 3 In the specific process, the coating system is respectively carried out to form the first coated part 100 and the second coated part 200. The first coated part 100 is coated on the upper surface, and the second coated part 200 is coated on the bottom surface. The diameter of the coating surface is 5mm inward on one side of the left and right edges. The 5mm area on the left edge facing the right can be uncoated, and the same is true for the right side; because the product is to be coated on a fixture, there is a certain area that cannot be coated, which is used to connect the fixture for positioning, and a processing allowance is left on one side, and the processing allowance area also belongs to the non-coating area.

[0082] After coating, shape processing is required, for example, the processing reserve on the left and right sides needs to be removed, and C6 chamfers need to be processed at the front and back ends. The edge collapse needs to be controlled within 0.05. At this time, the protective glass needs to be bonded to the first coating surface (the second coating surface). When bonding the protective glass, one end should be aligned and the other end should be smaller than the part size by a processing allowance. The product is subjected to light gluing and polishing, and at least 0.05mm needs to be removed to obtain the first coating part 100 and the second coating part 200 that meet the edge collapse amount.

[0083] See also Figure 1 , Figure 5, step S200, obtain two plates with the same reference surface by same-plate processing, position them with the reference surface, and respectively process the two plates to obtain a third coated part and a fourth coated part, wherein 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, and 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] See also Figure 1 , Figure 3 In the specific process, since the spatial angle is inclined in both directions (the spatial angle is an angle in both directions of the product), the key point of the product is how to control the angle of the inclined surface where the spatial angle of the product is located, especially the parallelism between the first spatial angle 310 (the inclined surface) of the third coated part 300 and the second spatial angle 410 (the inclined surface) on the fourth coated part 400. According to the parallelism of the third coated part 300 on the right and the fourth coated part 400 on the left after gluing and fixing, which is 10', the angle of each part is ±5' of the theoretical value, which needs to be extended by half. Therefore, the accuracy of the spatial angle on each coated part is required to be higher.

[0085] Therefore, the third coated part 300 and the fourth coated part 400 are processed by the same plate processing method, so that the processing of the third coated part 300 and the fourth coated part 400 has the same reference plane, and the reference plane is used for positioning. When the third coated part 300 and the fourth coated part 400 are processed separately, the processing errors of the two are small. This is conducive to the dimensional accuracy between the third coated part 300 and the fourth coated part 400 after processing is well guaranteed during processing. The angle difference between the surfaces of the third coated part 300 (the fourth coated part 400) is not greater than the predetermined angle value, and the predetermined angle value of this embodiment is at least half of the standard tolerance angle value required for the quality of the final product; the length dimension tolerance between the surfaces of the third coated part 300 (the fourth coated part 400) is not greater than the predetermined tolerance value, and the predetermined tolerance value is one-fourth of the standard tolerance value required for the quality of the final product.

[0086] For example, the standard tolerance angle value required for the quality of the final product is parallelism ≤10'; then the angle between the final product faces is ≤5', and the two linear angle values ​​are required to be within ±5'. The theoretical linear value of the product is processed according to the actual angle. Since the product is a spatial angle, the size between the points of the product affected by the angle needs to be confirmed based on the relationship between the longitudinal removal margin and the angle. Since the standard tolerance value required for the quality of the final product 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] See also Figure 2 , Figure 5 In step S200, the following steps are specifically included:

[0088] Step S210, providing two blanks for benchmark processing on the same optical plate to obtain panels with the same benchmark surface, wherein the angle between the surfaces of a single panel is within a predetermined benchmark value and a predetermined machining allowance is reserved.

[0089] In the specific process, before making the structure, the accuracy of the reference surface is guaranteed by controlling the reference so as to minimize the influence of the reference on the size. Therefore, long strip blanks are used for reference processing. During the processing, two blanks are required to be processed on the same processing disk for the predetermined surface to obtain a plate with the same reference surface. The reference surface is required to have an angle tolerance of within 20″ with all surfaces, that is, the vertical and parallel angle values ​​between all surfaces of the plate obtained after processing are required to be within 20″. The obtained plate also has a processing allowance of 0.25 to 1 mm. Since the reference surfaces of the third coating surface and the fourth coating surface are processed by the same disk, this step provides a guarantee for the product to achieve the theoretical size value of ±0.005mm.

[0090] Step S220, after positioning with the reference plane, the single plate is subjected to structural processing and then polishing to obtain a 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.

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

[0092] Step S240, after positioning with the reference plane, another single plate is subjected to structural processing and then polishing 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 a fourth coated component.

[0094] Then, the structure is processed to produce the surfaces of the third coated part (fourth coated part) and the inclined surface where the first spatial angle (second spatial angle) is located. Then, the product is polished, and finally, the angle between the surfaces of the third coated part (fourth coated part) is controlled to be ≤5′, and the two linear angle values ​​are required to be within ±5′; the angle between the vertical or parallel surfaces can be controlled to be ≤20″, so that the angle between the lines of the two surfaces of the product can be controlled to be within ±5′.

[0095] Finally, the inner surface (left side surface) of the third coated part is coated, and the coating diameter is 3mm inward from the edge; the inner surface (right side surface) of the fourth coated part is coated, and the coating diameter is 3mm inward from the edge. The coating overlap area (uncoated area) of the coating surfaces of the third and fourth coated parts is removed until there is no overlap in the coating area, so that full-diameter coating can be achieved.

[0096] See also Figure 2 , Figure 7 , step S300, provide an assembly tool, position the first coated part and the third coated part respectively through the assembly tool, 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 on the surface where the first coated surface of the first coated part is located.

[0097] See also Figure 6 , Fig.12 In the specific process, an assembly tool 500 is designed to position each coated part when bonding, ensuring that the angle between the surfaces of the assembly tool 500 is controlled within 20″. The structure of the assembly tool 500 specifically includes: a positioning plate 510, a rectangular positioning block 520 and a square brick positioning block 530. The upper surface of the positioning plate 510 is a bottom positioning surface 511, the rectangular positioning block 520 is fixed on the upper surface of the positioning plate 510, and the left and right side surfaces of the rectangular positioning block 520 serve as side positioning surfaces 521. Two square brick positioning blocks 530 can be provided. The two square brick positioning blocks 530 are respectively located on the left and right sides of the rectangular positioning block 520 and fixed on the upper surface of the positioning plate 510. The two square brick positioning blocks 530 can be respectively located at the two ends of the front and rear directions of the rectangular positioning block 520, and the end surfaces of the two square brick positioning blocks 530 facing each other serve as end positioning surfaces 531. In this way, the end positioning surfaces 531, the side positioning surfaces 521 and the bottom positioning surfaces 511 are perpendicular to each other, and the angle between the surfaces is controlled within 20". Since the accuracy requirements between the positioning surfaces of the assembly tooling 500 are high, it is ensured that each coated part is positioned and assembled thereon with high accuracy.

[0098] The fixing method of each coated part can be gluing or photo-gluing. In this embodiment, gluing followed by photo-curing is used for fixing, and the specific description is mainly based on the gluing fixing method.

[0099] See also Figure 6 , Figure 8, place the outer surface of the third coating part 300 on the right side in close contact with the side positioning surface 521 of the assembly tool 500, drip glue on the bottom surface of the third coating part 300 and the surface (top surface) where the first coating surface of the first coating part 100 is located, and adjust the angle of the comparator using the standard block of the theoretical angle (the theoretical angle is the angle designed in the drawing, such as 45.86°), reset the comparator, place the assembly tool 500 and the combination of the first coating part 100 and the third coating part 300 on the comparator platform, and adjust the angle to coincide with the zero point. That is, it is considered that the angle (such as the first spatial angle 310) between the third coating part 300 and the first coating part 100 is adjusted to a position that meets the requirements of the drawing. Apply UV glue and cure.

[0100] See also Figure 1 , Figure 7 Therefore, step S300 of this embodiment specifically includes:

[0101] Step S310: providing an assembly tool, wherein the assembly tool has an end positioning surface, a side positioning surface and a bottom positioning surface that are perpendicular to each other.

[0102] Step S320 , positioning the first coating component against the end positioning surface, the side positioning surface, and the bottom positioning surface so that the first coating surface faces upward.

[0103] In a specific process, the first film-coated component located at the bottom is placed on the gluing tooling, and the bottom surface of the first film-coated component is closely against the bottom positioning surface of the tooling.

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

[0105] See also Figure 6 , Figure 8 , place the outer surface of the third coated part against the side positioning surface, and glue the bottom surface of the third coated part against the surface where the first coated surface of the first coated part is located; place the assembly tool on the comparator platform, and adjust the angles of the first and third coated parts to coincide with the zero point of the comparator, where the comparator is pre-calibrated and zeroed with a standard block with a preset angle. For ease of detection, the theoretical angle value of the part is 45.86°, and the processing is also based on 45.86°. Similarly, when testing, first find the zero point of the comparator, or set the zero point. At this time, place the part on the equipment to see the deviation from the set zero point, and then understand the actual processing of the product. Then adjust according to the deviation, for example, adjust to coincide with the zero point, so as to ensure that the assembled first and third coated parts meet the theoretical angle requirements of the drawing design.

[0106] See also Fig.10 It should be noted that if the inclined surface (front side) of the first spatial angle is a frosted surface, since the frosted surface cannot be seen on the comparator, a polishing medium is required to ensure angle detection. Therefore, it is necessary to set a parallel optical sheet 600 on the inclined surface of the first spatial angle, and the opposite parallel surface of the parallel optical sheet 600 is a polished surface. Then, the first spatial angle of the third coated part with the parallel optical sheet adhered to it can be found on the comparator, and the front surface of the parallel optical sheet is consistent with the inclined surface of the spatial angle. Therefore, the image of the front surface of the parallel optical sheet is regarded as the image of the first spatial angle. The parallelism between the front and rear surfaces of the parallel optical sheet is <5", which reduces the influence of assembly tolerance and ensures high-precision detection effect.

[0107] Moreover, in the specific process of adjusting the angle to the preset angle and recording the image of the first spatial angle through the comparator, the comparator finds the image of the first spatial angle of the fixed third coated part, and adjusts the comparator to zero according to the image of the first spatial angle. The zero position at this time is the current position of the image of the first spatial angle, thereby realizing the function of recording the image of the first spatial angle. Subsequent comparison with the zero position is to compare with the image of the first spatial angle. Due to the influence of parallelism or verticality when parts are bonded, the angle value originally returned to zero will be directly affected. At this time, by resetting the zero point, the detection process is more accurate and the assembled product has higher accuracy.

[0108] Step S340: fix the first coating component and the third coating component by photocuring.

[0109] Finally, ultraviolet light is irradiated to cure the ultraviolet glue at the right edge of the upper surface of the first coating part and the bottom surface of the third coating part, so that the first coating part and the third coating part are installed and fixed.

[0110] See also Figure 1 , Fig.11 Step S400, position the fourth coated part by assembling the tooling, adjust the fourth coated part according to the image of the second spatial angle in the comparator, make the image deviations of the second spatial angle in the comparator and the first spatial angle in the upper and lower directions and the left and right directions within a predetermined value, and bond the fourth coated part to the surface where the first coated surface of the first coated part is located.

[0111] See also Fig. 9 In the specific process, the outer side surface of the fourth coated part 400 is abutted against the side positioning surface 521, the image of the fourth coated part 400 in the comparator (especially the inclined surface corresponding to the second spatial angle 410) is observed, and the fourth coated part 400 is fine-tuned so that the image deviation of the fourth coated part 400 in the comparator and the image of the third coated part 300 in the upper and lower directions and left and right directions is within a predetermined value, for example, the predetermined value may be 1′.

[0112] See also Figure 1 , Fig.11 Step S400 specifically includes the following steps:

[0113] Step S410, placing the outer surface of the fourth coated component against the side positioning surface of the assembly tool, and dripping glue on the bottom surface of the fourth coated component and the surface where the first coated surface of the first coated component is located.

[0114] During the abutment process, for the convenience of detection, the fourth coated part can be arranged on the side positioning surface on the other side of the rectangular positioning block in the left and right direction, and one end can be positioned by the square brick positioning block on this side, which is more convenient for assembly.

[0115] Step S420, adjusting the fourth coating component according to the image of the second spatial angle in the comparator, so that the image deviations of the second spatial angle in the comparator and the image of the first spatial angle in the upper and lower directions and the left and right directions are within a predetermined value.

[0116] Since the image of the first spatial angle of the third coated part is recorded as a standard by setting the zero point in the comparator in the previous step, it is necessary to adjust the fourth coated part according to the relative position of the image of the second spatial angle of the fourth coated part in the comparator and the zero point. In this way, the image deviation of the fourth coated part from the zero point position in the upper and lower directions and in the left and right directions is less than 1', which can meet the quality requirements.

[0117] See also Fig.10 It should be noted that if the inclined surface (front side) of the second spatial angle is a frosted surface, a parallel optical sheet 600 is arranged on the inclined surface of the second spatial angle, wherein the opposite parallel surfaces of the parallel optical sheet 600 are polished surfaces, and the inclined surface of the second spatial angle is a frosted surface.

[0118] Step S430: bonding the fourth coating member to the surface of the first coating member by photocuring.

[0119] Finally, ultraviolet light is irradiated to cure the ultraviolet glue at the left edge of the upper surface of the first coating part and the bottom surface of the fourth coating part, so that the first coating part and the fourth coating part are installed and fixed.

[0120] See also Figure 1 Step S500: Position the second coated part by assembling the tooling, and bond the second coated surface of the second coated part to the third coated part and the fourth coated part.

[0121] See also Fig.12, place the second coated surface of the second coated part 200 located at the top (lower surface) close to the top surfaces of the third coated part 300 and the fourth coated part 400, the right side surface of the second coated part 200 close to the side positioning surface 521 of the assembly tooling, and the rear end surface close to the end positioning surface 531, drip UV glue, and cure it to complete the assembly.

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

[0123] In summary, the present application provides a method for processing an optical component with a light-reflecting inner cavity, which adopts the form of coating on optical glass so that the light-reflecting inner cavity formed by the optical component can 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; 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′, so that more parts can be added to the product to achieve more optical performance.

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

Claims

1. A method for processing an optical component having a light reflecting inner cavity, characterized in that: Includes steps: A first film-coated component and a second film-coated component are obtained by processing, wherein the first film-coated component has a first film-coated surface, and the second film-coated component has a second film-coated surface; Two plates having the same reference surface are obtained by processing on the same plate, and the reference surface is used for positioning, and the two plates are processed to obtain a third coated part and a fourth coated part, respectively, wherein 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, and 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; Providing an assembly tool, positioning the first coated component and the third coated component respectively by means of the assembly tool, adjusting the angle of the third coated component to a preset angle by means of a comparator and recording the image of the first spatial angle, and fixing the bottom surface of the third coated component on the surface of the first coated component where the first coated surface is located; Positioning the fourth film-coated component by means of an assembly tool, adjusting the fourth film-coated component according to the image of the second spatial angle in the comparator, so that the image deviations of the second spatial angle in the comparator and the image of the first spatial angle in the upper and lower directions and in the left and right directions are within a predetermined value, and fixing the fourth film-coated component on the surface where the first film-coated surface of the first film-coated component is located; The second film-coated component is positioned by an assembly tool, and the surface where the second film-coated surface of the second film-coated component is located is bonded to the third film-coated component and the fourth film-coated component.

2. The method for processing an optical component having a light reflecting inner cavity according to claim 1, characterized in that: After two plates having the same reference surface are obtained by processing on the same plate, the steps of positioning the two plates by using the reference surface and respectively processing the two plates to obtain the third coated part and the fourth coated part specifically include: Providing two blanks for reference processing on the same optical plastic disc to obtain plates with the same reference surface, wherein the angle between the surfaces of a single plate is within a predetermined reference value and a predetermined processing allowance is reserved; After positioning with the reference plane, a single plate is subjected to structural processing and then polishing to obtain a 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; Performing coating on the inner surface of the third optical component to obtain a third coated component; After positioning with the reference plane, another single plate is subjected to structural processing and then polishing 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 component is coated to obtain a fourth coated component.

3. The method for processing an optical component having a light reflecting inner cavity according to claim 2, characterized in that: In the step of providing an assembly tool, positioning the first coated part and the third coated part respectively by means of the assembly tool, adjusting the angle of the third coated part to a preset angle by means of a comparator and recording the image of the first spatial angle, and fixing the bottom surface of the third coated part on the surface of the first coated part where the first coated surface is located: Providing an assembly tool, the assembly tool having an end positioning surface, a side positioning surface and a bottom positioning surface which are perpendicular to each other; Positioning the first coating member against the end positioning surface, the side positioning surface, and the bottom positioning surface so that the first coating surface faces upward; The outer surface of the third coated part is placed against the side positioning surface, and the angle is adjusted to a preset angle through a comparator and the image of the first spatial angle is recorded, and the bottom surface of the third coated part is bonded to the surface where the first coated surface of the first coated part is located.

4. The method for processing an optical component having a light reflecting inner cavity according to claim 3, characterized in that: In the step of placing the outer surface of the third coated part against the side positioning surface, adjusting the angle to a preset angle through a comparator and recording the image of the first spatial angle, and 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 coating member is placed against the side positioning surface, and the bottom surface of the third coating member and the surface where the first coating surface of the first coating member is located are glued; Placing the assembly tool on a comparator platform, and adjusting the angles of the first coated part and the third coated part to coincide with the zero point of the comparator, wherein the comparator is calibrated and zeroed in advance using a standard block with a preset angle; The first coating member and the third coating member are fixed by photocuring.

5. The method for processing an optical component having a light reflecting inner cavity according to claim 4, characterized in that: The step of adjusting the angle to a preset angle through a comparator and recording the image of the first spatial angle also includes: The image of the first spatial angle of the fixed third coating component is found through a 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 having a light reflecting inner cavity according to claim 3, characterized in that: The step of placing the outer surface of the third coating member against the side positioning surface, adjusting the angle to a preset angle through a comparator and recording the image of the first spatial angle, and bonding the bottom surface of the third coating member to the surface where the first coating surface of the first coating member is located also includes: A parallel optical sheet is arranged on the inclined surface of the first spatial angle, wherein the opposite parallel surfaces of the parallel optical sheet are polished surfaces, and wherein the inclined surface of the first spatial angle is a frosted surface.

7. The method for processing an optical component having a light reflecting inner cavity according to claim 3, characterized in that: In the step of positioning the fourth film-coated component by an assembly tool, adjusting the fourth film-coated component according to the image of the second spatial angle in the comparator so that the image deviations of the second spatial angle in the comparator and the image of the first spatial angle in the upper and lower directions and the left and right directions are within a predetermined value, and fixing the fourth film-coated component on the surface where the first film-coated surface of the first film-coated component is located: Placing the outer surface of the fourth coated part against the side positioning surface of the assembly tool, and dripping glue on 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 coating member is adjusted according to the image of the second spatial angle in the comparator, so that the image deviations of the second spatial angle in the comparator and the image of the first spatial angle in the upper and lower directions and in the left and right directions are within a predetermined value; The fourth coating member is bonded to the surface of the first coating member by photocuring.

8. The method for processing an optical component having a light reflecting inner cavity according to claim 7, characterized in that: The step of positioning the fourth film-coated component by an assembly tool, adjusting the fourth film-coated component according to the image of the second spatial angle in the comparator so that the image deviations of the second spatial angle in the comparator and the image of the first spatial angle in the upper and lower directions and the left and right directions are within a predetermined value, and bonding the fourth film-coated component to the surface where the first film-coated surface of the first film-coated component is located also includes: A parallel optical sheet is arranged on the inclined surface of the second spatial angle, wherein the opposite parallel surfaces of the parallel optical sheet are polished surfaces, and wherein the inclined surface of the second spatial angle is a frosted surface.

9. The method for processing an optical component having a light reflecting inner cavity according to claim 1, characterized in that: In the step of ensuring that 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: 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 quality of the final product.

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

Images