Structure and method for bonding plane mirrors and calibrating angles at same time

Abstract

The invention provides a structure and method for bonding plane mirrors and calibrating angles at the same time, and relates to the technical field of aviation, the structure comprises a frame, an infrared turn-back assembly, a flexible lens pressing ring, a mirror frame, a mirror and a pin gauge, the flexible lens pressing ring and the mirror frame are used for axially positioning the mirror, and the pin gauge is arranged in the radial direction of the mirror. When the glue is injected, the area and the thickness of the glue are accurately controlled, the tension generated on the mirror surface of the reflector after the glue is cured is uniformly distributed, the surface precision of the reflector is ensured, the arrangement of the cover plate can effectively prevent light leakage, stray light is prevented from influencing the imaging quality, and the technical problem that the surface precision is reduced when an existing reflector is installed is solved.

Description

Technical Field

[0001] The present invention relates to the field of aviation technology, and in particular to a structure and method for bonding and calibrating the angle of a plane reflector. Background Art

[0002] The aviation payload is limited by the volume and weight of the spherical cabin. In the design of optical systems, reflectors are often used to deflect the light path. This not only makes the entire optical system space more compact, improves the strength of the whole machine and reduces the weight, but also makes full use of the envelope space by changing the direction of the light path. Therefore, there may be several to more than a dozen reflectors in an optical system. Although changing the direction of the light path does not affect the optical imaging, the surface accuracy of the reflector itself has a great influence on the optical imaging effect after reflection. Therefore, in an optical system with multiple reflectors, the design, processing and assembly of the support structure of the reflector are particularly important.

[0003] At present, the installation method of small flat reflectors on engineering equipment mostly adopts to install the reflector in the mirror frame and then press the edge of the reflector with a pressure ring. In this installation method, the mirror surface is squeezed by the mechanical pressure ring, and the surface accuracy is difficult to guarantee. Another support method is to bond the outer diameter edge of the reflector and the mirror frame together with RTV silicone rubber. After the glue is cured, they become one body. However, when the components are integrated, the angle of the reflector often needs to be calibrated by a theodolite. Two methods are often used in the calibration process. The first is to change the angle of the reflector by grinding the contact surface angle of the gasket between the reflector frame and the reflector frame mounting seat. The second is to change the angle of the reflector by directly inserting a thin gasket at the screw screw of the reflector seat. However, both methods will cause the reflector frame to be deformed due to the height difference in the flatness of the reflector frame mounting surface when tightening the screws, thereby reducing the surface accuracy of the reflector. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art, thereby providing a structure and method for bonding a plane reflector and calibrating its angle at the same time.

[0005] A structure for bonding a plane reflector and calibrating its angle simultaneously comprises: a frame and an infrared folding assembly, wherein a cover plate is provided on the frame, and the infrared folding assembly comprises a flexible lens pressing ring, a mirror frame and a reflector, wherein the reflector is arranged on the frame, and the mirror frame is arranged on the frame, and the flexible lens pressing ring is arranged on the frame and is located above the reflector, and the flexible lens pressing ring contacts the reflector, and a pin gauge is further provided between the reflector and the frame, and the pin gauge is provided on the flexible lens pressing ring, and the frame is further provided with a glue injection hole, and the glue injection hole corresponds to the position of the pin gauge.

[0006] Furthermore, the flexible lens pressing ring is a flange pressing ring, which is arranged on the frame and located above the reflector. The flange pressing ring contacts the reflector, and flexible grooves are staggered on the flange pressing ring.

[0007] Furthermore, the flexible groove includes a circular portion and a strip portion, the circular portion is arranged at both ends of the strip portion, and the strip portion and the circular portion are connected.

[0008] Furthermore, the structure also includes a grinding pad, which is arranged between the mirror frame and the frame.

[0009] Furthermore, the structure also includes a boss, which is arranged on the frame.

[0010] Furthermore, the boss is an arc-shaped structure, and the top of the frame is provided with a chamfered structure.

[0011] Furthermore, a pinhole groove corresponding to the pin gauge is provided on the flange pressure ring, and the pin gauge is arranged on the pinhole groove.

[0012] Furthermore, the pinhole grooves are arranged in pairs on the flange pressing ring, and each pair of pinhole grooves is evenly arranged at intervals of 120 degrees.

[0013] Furthermore, the structure further comprises a light splitting component and a visible light returning component, and both the light splitting component and the visible light returning component are arranged on the frame.

[0014] The present invention also includes a method for bonding a plane reflector and calibrating its angle at the same time. The method is based on a structure for bonding a plane reflector and calibrating its angle at the same time as described in any of the above items. First, the reflector is installed in a frame, and a flexible lens pressure ring is installed above the reflector. The flexible lens pressure ring contacts the reflector and is connected to the frame. Then, a needle gauge is installed from the flexible lens pressure ring between the reflector and the frame, and glue is injected through the glue injection hole. When the glue solidifies but is not completely solidified, the frame is installed on the frame and the angle of the reflector is calibrated at the same time. After the angle calibration is completed, wait until the glue is completely solidified and take out the needle gauge.

[0015] The technical solution of the present invention has the following advantages: In the technical solution provided by the present invention, a flexible lens pressure ring and a lens frame are used to perform axial positioning of the reflector, a pin gauge is set in the radial direction of the reflector, and when glue is injected through the glue injection hole, the area and thickness of the glue are precisely controlled, so that the tension generated on the mirror surface of the reflector after the glue is cured is evenly distributed, effectively avoiding excessive pulling of the local surface causing a decrease in the surface accuracy of the reflector, and realizing the simultaneous bonding and angle calibration of the reflector, thereby ensuring the surface accuracy of the reflector. The setting of the cover plate can effectively prevent light leakage and avoid stray light from affecting the imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the structure of the infrared return component and the visible return component of the present invention; Figure 3 It is a cross-sectional view of the overall structure of the present invention; Figure 4 Schematic diagram of the adhesive layer and needle gauge structure of the present invention; Figure 5 This is a schematic diagram of the connection relationship between the flange pressing ring, the mirror frame, the grinding pad and the reflector of the present invention; Figure 6 It is a structural schematic diagram of the flange pressing ring and the mirror frame of the present invention; Figure 7 It is a structural schematic diagram of the flexible groove of the present invention; Figure 8 It is a structural schematic diagram of the glue injection hole and boss of the present invention.

[0018] Description of reference numerals: 1-frame; 2-cover; 3-spectrometer assembly; 4-infrared folding assembly; 5-visible folding assembly; 6-glue layer; 7-pin gauge; 8-flange pressure ring; 9-mirror frame; 10-grinding pad; 11-reflector; 12-pinhole slot; 13-glue injection hole; 14-reference end face; 15-flexible slot; 16-circular part; 17-strip part; 18-boss; 19-light inlet. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0022] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] like Figures 1 to 8 The structure shown is used for bonding a plane reflector and calibrating the angle at the same time, comprising: a frame 1 and an infrared folding assembly 4, wherein a cover plate 2 is provided on the frame 1, and the infrared folding assembly 4 comprises a flexible lens pressing ring, a mirror frame 9 and a reflector 11, wherein the reflector 11 is provided on the mirror frame 9, and the mirror frame 9 is provided on the frame 1, and the flexible lens pressing ring is provided on the frame 9 and is located above the reflector 11, and the flexible lens pressing ring contacts the reflector 11, and a pin gauge 7 is further provided between the reflector 11 and the frame 9, and the pin gauge 7 is provided on the flexible lens pressing ring, and a glue injection hole 13 is further provided on the frame 9, and the glue injection hole 13 corresponds to the position of the pin gauge 7. In order to facilitate the display of the internal structure, the following is attached. Figure 1 The cover plate 2 is open. Under normal circumstances, the cover plate 2 is fully covered and closed, and is fixedly connected to the frame 1 by screws at the four corners.

[0024] The above-mentioned structure for bonding and calibrating the angle of a plane reflector utilizes a flexible lens pressure ring and a mirror frame 9 to perform axial positioning of the reflector 11, and a pin gauge 7 is set in the radial direction of the reflector 11. When injecting glue through the glue injection hole 13, the area and thickness of the glue are precisely controlled, so that the tension generated on the mirror surface of the reflector 11 after the glue is cured is evenly distributed, effectively avoiding excessive pulling of the local surface causing a decrease in the surface accuracy of the reflector 11, and realizing the simultaneous bonding and angle calibration of the reflector 11, thereby ensuring the surface accuracy of the reflector 11. The setting of the cover plate 2 can effectively prevent light leakage and avoid stray light affecting the imaging quality.

[0025] like Figures 5 to 7 As shown, in this embodiment, the flexible lens pressing ring is a flange pressing ring 8, which is arranged on the frame 9 and is located above the reflector 11. The flange pressing ring 8 is in contact with the reflector 11, and flexible grooves 15 are staggered on the flange pressing ring 8; three mechanical stoppers are evenly distributed on the outer ring of the flange pressing ring 8, and the mechanical stoppers cooperate with screws to fix the flange pressing ring 8 to the frame 9. At the same time, the flange pressing ring 8 is in contact with the reflector 11 to realize axial positioning and installation of the reflector 11, and the flexible grooves 15 are processed by electric spark wire cutting. The flexible grooves 15 enable the flange pressing ring 8 to have a damping unloading pressing force when squeezing the reflector 11 lens. The staggered arrangement of multiple flexible grooves 15 can effectively disperse this pressing force, thereby ensuring that the position of the reflector 11 lens can be fixed, and the surface shape of the reflector 11 mirror surface will not be changed due to uneven force distribution.

[0026] like Figure 5 and Figure 7 As shown, in this embodiment, the flexible groove 15 includes a circular portion 16 and a strip portion 17. The circular portion 16 is arranged at both ends of the strip portion 17, and the strip portion 17 is connected to the circular portion 16; and the cross-sectional diameter of the circular portion 16 is larger than the width of the strip portion 17, and the two ends are designed to be circular structures, so that when the flexible groove 15 is deformed by force, it will not cause local large force at both ends, which will lead to easy tearing at both ends. The design of the strip portion 17 and the circular portion 16 being connected ensures the structural stability of the flexible groove 15, and can effectively unload the clamping force while ensuring the axial positioning of the reflector 11.

[0027] like Figure 1 、 Figure 3 、 Figure 5 and Figure 6As shown, in this embodiment, the structure also includes a grinding pad 10, which is arranged between the mirror frame 9 and the frame 1; three mechanical stops are evenly distributed on the outer ring of the mirror frame 9, and the mechanical stops are connected to the frame 1 by screws, so that the mirror frame 9 and the frame 1 are fixedly connected, and a grinding pad 10 is arranged at the connection between the mechanical stop and the frame 1. When performing angle calibration, the angle of the reflector 11 is adjusted by grinding the grinding pad 10, thereby completing the angle calibration.

[0028] like Figure 5 、 Figure 6 and Figure 8 As shown, in this embodiment, the structure also includes a boss 18, which is arranged on the mirror frame 9; the bosses 18 are evenly arranged inside the mirror frame 9 at intervals of 120 degrees, and the bosses 18 are arranged at the bottom of the mirror frame 9, and are used to contact the reflector 11 to form an axial limit at the bottom, and are evenly arranged at intervals of 120 degrees to achieve three-point support for the reflector 11, and the three points determine a plane, thereby ensuring the flatness of the reflector 11 during installation.

[0029] like Figure 5 、 Figure 6 and Figure 8 As shown, in this embodiment, the boss 18 is an arc-shaped structure, and the top of the frame 9 is provided with a chamfered structure; the arc-shaped boss 18 can better fit the frame 9, ensuring that the reflector 11 is smoothly and stably installed in the frame 9, and the two ends of the boss 18 are also processed into an arc-shaped structure. This design reduces the application of materials, thereby reducing the weight of the overall structure, but also ensures the stability and flatness of the installation of the reflector 11. The chamfered structure on the top of the frame 9 is arranged at the inner circle position of the mounting port of the frame 9. The chamfered structure reduces the risk of the reflector 11 colliding with the frame 9 during installation, thereby damaging the reflector 11, thereby improving the safety measures and safety of the installation process, and also helps to reduce the weight of the frame 9 and realize a lightweight design of the structure.

[0030] like Figures 4 to 8As shown, in this embodiment, a pinhole groove 12 corresponding to the pin gauge 7 is provided on the flange pressing ring 8, and the pin gauge 7 is arranged on the pinhole groove 12; the pinhole grooves 12 are arranged in pairs on the flange pressing ring 8, and each pair of pinhole grooves 12 is evenly arranged at intervals of 120 degrees; the upper half of the pin gauge 7 is in the pinhole groove 12, and the lower half of the pin gauge 7 is between the reflector 11 and the frame 9, and the pinhole groove 12 cooperates with the pin gauge 7 to ensure the installation of the pin gauge 7, and at the same time, each pair of pinhole grooves 12 is evenly arranged at intervals of 120 degrees to ensure that the radial gap between the reflector 11 and the frame 9 after assembly is uniform and equal. Moreover, since the injection hole 13 corresponds to the position of the pin gauge 7, when glue is injected through the injection hole 13, the presence of the paired pin gauges 7 and the upper flange pressure ring 8 will limit the thickness uniformity of the glue layer 6 and the bonding area to be equal, and there will be no glue overflow. The molding quality of the glue layer 6 is accurately controlled. The glue uses EC2216-B / A epoxy resin glue, and the thickness of the glue layer 6 is 0.15mm. This can ensure the quality of bonding, so that the tension generated by the glue layer 6 on the mirror surface of the reflector 11 after curing is evenly distributed, avoiding excessive pulling of the local surface shape causing a decrease in the surface shape accuracy of the reflector 11.

[0031] like Figures 1 to 3 As shown, in this embodiment, the structure also includes a spectrometer component 3 and a visible return component 5, and the spectrometer component 3 and the visible return component 5 are both arranged on the frame 1; the spectrometer component 3 and the visible return component 5 have the same structural composition and principle as the infrared return component 4, so the bonding process is also the same as the infrared return component 4, wherein the visible return component 5 is also installed on the frame 1 through a mechanical stop and screws, and the spectrometer component 3 is also installed in the same way inside the frame 1 to realize the spectrometer function. The difference is that the spectrometer component 3 and the visible return component 5 have a different positional placement relationship with the infrared return component 4. When performing angle calibration, light is vertically injected from the light inlet 19 perpendicular to the end face where the reference end face 14 is located. Figure 3 The direction of the arrow in the figure corresponds to the direction of the light path, wherein the angle between the reflective surface of the beam splitter on the beam splitter component 3 and the reference end surface 14, or the angle between the reflective surface of the beam splitter and the incident light The angle between the light after the light split by the spectrometer on the spectrometer component 3 and the light reflected by the reflector 11 on the infrared return component 4 is 45 degrees. is 90 degrees. Similarly, the angle between the light after the light split by the beam splitter on the beam splitter component 3 and the light returned to the reflector 11 on the visible return component 5 is is 90 degrees, and the angle between the outgoing light reflected by the reflector 11 on the visible return component 5 and the light after the light is split by the beam splitter on the beam splitter component 3 is is 90 degrees.

[0032] like Figures 1 to 8As shown, the present invention also includes a method for bonding a plane reflector and calibrating its angle at the same time. The method is based on any one of the above-mentioned structures for bonding a plane reflector and calibrating its angle. First, the reflector 11 is installed in the frame 9, and the flexible lens pressure ring is installed above the reflector 11. The flexible lens pressure ring contacts the reflector 11 and is connected to the frame 9. Then, the needle gauge 7 is installed from the flexible lens pressure ring between the reflector 11 and the frame 9, and glue is injected through the glue injection hole 13. When the glue solidifies but is not completely solidified, the frame 9 is installed on the frame 1 and the angle of the reflector 11 is calibrated at the same time. After the angle calibration is completed, wait until the glue is completely solidified and take out the needle gauge 7. Specifically, first install the reflector 11 in the frame 9, the boss 18 contacts the reflector 11 to form a limit, install the flange pressure ring 8 above the reflector 11, the flange pressure ring 8 contacts the reflector 11, and connect the flange pressure ring 8 and the frame 9 through a mechanical stop, and then insert three pairs of needle gauges 7 from the flange pressure ring 8 along the pinhole groove 12 between the reflector 11 and the frame 9. At this time, the design size of the gap between the reflector 11 and the frame 9 is 0.15mm±0.01mm, and then use a syringe to inject EC2216-B / A epoxy resin glue through the glue injection hole 13. Due to the presence of the paired needle gauges 7 and the upper flange pressure ring 8, the thickness uniformity of the glue layer 6 and the bonding area are equal, and there will be no glue overflow, and the precision Accurately control the molding quality of the glue layer 6, wait for 2 hours until the glue solidifies but is not completely solidified, then install the mirror frame 9 on the frame 1, and then calibrate the angle of the reflector 11. Since the structure and principle of the spectroscopic component 3 and the visible return component 5 are the same as those of the infrared return component 4, the above method is also applicable to the spectroscopic component 3 and the visible return component 5. According to the same method, the spectroscopic component 3 and the visible return component 5 are bonded and installed on the frame 1, and then the spectroscopic component 3, the infrared return component 4 and the visible return component 5 are calibrated. The calibration steps are as follows: the spectroscopic component 3, the infrared return component 4 and the visible return component 5 all use the self-collimation function of the theodolite to calibrate the angle with the reference end face 14 as the reference. Figure 3 The direction of the arrow in the figure corresponds to the direction of the light path. The light enters vertically from the light inlet 19 perpendicular to the end face where the reference end face 14 is located. First, the angle between the reflective surface of the beam splitter on the beam splitter component 3 and the reference end face 14 is adjusted by the self-collimation function of the theodolite. The angle between the light after the splitting mirror on the beam splitter 3 and the light reflected on the reflector 11 on the infrared return component 4 is calibrated by the self-collimation function of the theodolite. The angle between the light split by the beam splitter on the beam splitter component 3 and the light reflected to the reflector 11 on the visible return component 5 is calibrated by the self-collimation function of the theodolite. The angle between the outgoing light reflected by the reflector 11 on the visible return component 5 and the light split by the beam splitter on the beam splitting component 3 is 90 degrees. After the angle calibration is completed, let it stand for 24 hours. After the glue is completely cured, take out the needle gauge 7; The above method adopts the bonding technology to install the small reflector 11, optimizes the structural design, improves the installation process route, and performs the bonding and calibration of the small plane reflector 11 at the same time, ensuring that the calibration angle of the reflector 11 and the shape after the adhesive is cured can meet the index requirements. In the optical and mechanical positioning links, the structural parts are given shape and size tolerances, and a high-precision needle gauge 7 is used to be evenly distributed between the outer diameter of the reflector 11 and the inner diameter of the frame 9, so that the radial gap between the two is uniform and equal after assembly. In addition, the reflector 11 and the frame 9 are connected by an axis. The reflector 11 is positioned in the axial and radial directions and is in a stable relative position. During the angle calibration process, even if deformation occurs due to the screwing of the screws, resulting in a change in the relative position of the reflector 11 and the frame 9, since the glue is not completely cured, no tensile stress is generated between the glue and the reflector 11 lens, and therefore the mirror surface shape will not be affected. The angle calibration of the reflector 11 and the bonding are carried out simultaneously, avoiding the structural deformation caused by tightening the screws of the frame 9 after the glue layer 6 is cured, which causes a decrease in the mirror surface shape accuracy and reduces the dependence on the adjustment level of the adjustment personnel.

[0033] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A structure for bonding and simultaneously calibrating the angle of a plane reflector, comprising: A frame (1) and an infrared folding assembly (4), characterized in that a cover plate (2) is provided on the frame (1), the infrared folding assembly (4) comprises a flexible lens pressing ring, a lens frame (9) and a reflector (11), the reflector (11) is provided on the lens frame (9), the lens frame (9) is provided on the frame (1), the flexible lens pressing ring is provided on the lens frame (9) and is located above the reflector (11), the flexible lens pressing ring is in contact with the reflector (11), a pin gauge (7) is provided between the reflector (11) and the lens frame (9), the pin gauge (7) is provided on the flexible lens pressing ring, and a glue injection hole (13) is provided on the lens frame (9), and the glue injection hole (13) corresponds to the position of the pin gauge (7).

2. The structure for bonding and simultaneously calibrating the angle of a plane reflector according to claim 1, characterized in that: The flexible lens pressing ring is a flange pressing ring (8), which is arranged on the lens frame (9) and is located above the reflector (11). The flange pressing ring (8) contacts the reflector (11), and flexible grooves (15) are staggered on the flange pressing ring (8).

3. The structure for bonding and simultaneously calibrating the angle of a plane reflector according to claim 2, characterized in that: The flexible groove (15) comprises a circular portion (16) and a strip portion (17), the circular portion (16) being arranged at both ends of the strip portion (17), and the strip portion (17) and the circular portion (16) being connected.

4. The structure for bonding and simultaneously calibrating the angle of a plane reflector according to claim 1, wherein: The structure further comprises a grinding pad (10), which is arranged between the mirror frame (9) and the frame (1).

5. The structure for bonding and simultaneously calibrating the angle of a plane reflector according to claim 1, characterized in that: The structure further comprises a boss (18), which is arranged on the mirror frame (9).

6. The structure for bonding and simultaneously calibrating the angle of a plane reflector according to claim 5, characterized in that: The boss (18) is an arc-shaped structure, and the top of the mirror frame (9) is provided with a chamfered structure.

7. The structure for bonding and simultaneously calibrating the angle of a plane reflector according to claim 2, characterized in that: The flange pressing ring (8) is provided with a pinhole groove (12) corresponding to the pin gauge (7), and the pin gauge (7) is arranged on the pinhole groove (12).

8. The structure for bonding and simultaneously calibrating the angle of a plane reflector according to claim 7, characterized in that: The pinhole grooves (12) are arranged in pairs on the flange pressing ring (8), and each pair of pinhole grooves (12) is evenly arranged at intervals of 120 degrees.

9. The structure for bonding and simultaneously calibrating the angle of a plane reflector according to claim 1, characterized in that: The structure further comprises a light splitting component (3) and a visible light return component (5), and both the light splitting component (3) and the visible light return component (5) are arranged on the frame (1).

10. A method for simultaneously calibrating the angle of a plane reflector by bonding it, the method being based on the structure for simultaneously calibrating the angle of a plane reflector by bonding it according to any one of claims 1 to 9, characterized in that: First, the reflector (11) is installed in the frame (9), and the flexible lens pressing ring is installed above the reflector (11), so that the flexible lens pressing ring contacts the reflector (11) and is connected to the frame (9). Then, the needle gauge (7) is installed between the reflector (11) and the frame (9) from the flexible lens pressing ring, and glue is injected through the glue injection hole (13). When the glue solidifies but is not completely solidified, the frame (9) is installed on the frame (1) and the angle of the reflector (11) is calibrated at the same time. After the angle calibration is completed, wait until the glue is completely solidified and take out the needle gauge (7).

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