JPH052102U - Double-sided quartz glass lightweight mirror - Google Patents

Abstract

(57) [Summary] [Purpose] Lightweight, easy to handle, and can be used on both sides.
In addition, the atmosphere in each room is uniform, distortion does not occur even in large products, and temporal stability and dimensional stability are improved. [Structure] A rim portion 4 composed of a front surface mirror 2, a rim portion 4, a back surface mirror 3 and an outer peripheral ring 6 has a circular or polygonal cross-sectional shape of the rim portion 4 supporting the upper and lower mirror surfaces, and each rim surface has a through hole. A double-sided quartz glass lightweight mirror that is equipped with 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention is a lightweight mirror made of quartz glass, and more specifically, it can be used on both sides. Lasers, large-diameter mirrors and large prisms that can be used for astronomy.

[0002]

[Prior art]

  Conventionally, as a mirror made of quartz glass, a full-fledged double-sided type, quartz Made of fused silica glass, welded to each other on a glass cellular or honeycomb holding support It has an end plate and a number of open guide grooves penetrate the holder starting from the connecting surface of the mirror surface. Of a light reflecting mirror (Japanese Patent Laid-Open No. 56-17302) and front and rear plates of quartz glass. Having a support grid made of quartz glass fixedly connected to these plates between A lightweight mirror with ventilation holes in each room (Japanese Patent Laid-Open No. 57-6802) 6), and a single-sided lightweight mirror as shown in FIG. 7 is disclosed (JP-A-61-161). 223702 publication).

[0003]

[Problems to be solved by the device]

  However, in the case of the full type, both sides can be used, but the whole is full of quartz glass. Therefore, there is a drawback that it is heavy and inconvenient to handle.

[0004]   For this reason, the lightweight mirrors, which are convenient to handle, have come to be used. As shown in Fig. 7, the back side is open or has ventilation holes (Fig. 6 ), All of them could only be used on one side and could not monitor from the back side.

[0005]   Further, for example, as shown in FIG. 6 and FIG. 7, each room is independent by a support grid. Then, the temperature difference and atmosphere are different in each room, and the quartz glass made has a small coefficient of thermal expansion. However, due to the subtle temperature differences between rooms, thermal distortion is likely to occur and It is unstable with respect to temperature due to small conduction and heat dissipation. The required high degree of surface smoothness deteriorates, making precise measurement impossible. In addition, quartz Lath has poor thermal conductivity, so the thicker it is, the more easily distortion occurs. .

[0006]   This is especially noticeable as the product size increases, and the error increases as the product size increases. Strictly demanding stability over time, shape and dimensional stability against changes in ambient temperature It has been desired to develop a highly accurate mirror for the large mirrors used.

[0007]   The present invention is lightweight, easy to handle, can be used on both sides, and the atmosphere of each room is The objective is to provide a lightweight mirror that is uniform and does not cause distortion even in large products. It

[0008]

[Means for Solving the Problems]

  Therefore, the inventors of the present invention have conducted extensive studies to solve the above-mentioned object, and as a result, The rim supporting the lower mirror surface has a circular or polygonal honeycomb structure in cross section, Based on the knowledge that the above problems can be solved by providing a through hole on each rim surface, the present invention was realized. completed.

[0009]   An embodiment of the present invention will be described below with reference to the drawings.   FIG. 1 is a schematic view of a part of the upper and lower mirror parts of the quartz glass lightweight mirror of the present invention used for both sides. It is the perspective view which lacked and was shown. 2 is a plan view thereof, and FIG. 3 is AA of FIG. It is sectional drawing by a line.

[0010]   The light-weight mirror 1 made of quartz glass of the present invention shown in FIG. 1 is a surface plate (surface mirror). 2, a rim portion 4, a back surface portion (back surface mirror) 3, and an outer peripheral ring 6.

[0011]   The rim portion 4 is a pillar that supports the upper and lower quartz glass mirrors, and has a circular cross section or a cross section. By using a polygonal honeycomb structure, distortion in flatness and sphericity is less likely to occur. And stable in strength. In addition, in the drawing, the cross-sectional shape of the rim is hexagonal. However, a cylinder or a polygonal prism can be used as appropriate.

[0012]   The rim portion 4 is provided with a conduction hole 5 at an arbitrary position on each surface. Provide a through hole 5 By doing so, the atmosphere such as temperature conditions will be uniform even in each room partitioned by rims. It can be maintained and prevent distortion caused by different atmospheres in each room, Also, it becomes possible to use both sides of the mirror surface.

[0013]   The position of the through hole is not particularly specified, but it is preferable to provide it at the center of each rim surface. Good for adjusting the atmosphere in the room.

[0014]   The rim portion 4 can be formed integrally from the beginning so that the hollow portion shown in FIG. After forming the hexagonal column that has the pressure reduction and forming the through hole on each surface, combine the hexagonal columns in series. A honeycomb structure or two hexagonal columns as shown in FIG. The honeycomb structure shown in FIG. It

[0015]   Further, if the outer peripheral ring 6 for reinforcement is provided on the rim portion 4, cracks on the outer peripheral portion can be prevented. It can be stopped, strengthens strength and is easy to handle, but also conducts to the outer ring. It is preferable to provide holes.

[0016]   The double-sided quartz glass lightweight mirror of the present invention is used for the rim part or the outer part of the honeycomb structure. It is obtained by joining the upper and lower plates to the rim portion installed on the circumferential ring. In addition, It is preferable that the glass portion and the upper and lower mirror surface portions are all made of quartz glass.

[0017]   In addition, the double-sided quartz glass lightweight mirror of the present invention can be used on both sides. The surface can be used as a flat surface or a spherical surface and one surface as a spherical surface. After adjusting the rim length in advance, or after making the rim part a honeycomb structure, After the surface has been processed into a flat surface and one surface has been processed into a spherical surface, the upper and lower plates with the same curvature are joined to the rim section. Finally, it can be made by polishing a precise plane or spherical surface.

[0018]   The shape of the quartz glass lightweight mirror used on both sides is generally rim, front plate, and back plate. Depending on the thickness of the rim and the shape and size of the rim, the inherent rigidity of the structure, It is determined from the viewpoint of maintaining strength, and can be appropriately determined according to the application. A ratio of height to diameter of about 1:10 to 1:15 prevents self-weight deformation and bending. It is preferable for stopping.

[0019]

[Effect of device]

  Compared to the case where the entire mirror is made full, the weight is reduced by the hollow method with the rim. The weight is reduced by 70% or more compared to the full type, making clamping and handling easier. Workability is improved.

[0020]   Also, due to the honeycomb structure, the structure is solid, so processing such as polishing and coating Deformation does not occur even when used.

[0021]   Furthermore, the rim portion has a honeycomb structure with a circular or polygonal cross section, and By providing a through hole on the surface, it is possible to vent gas during production and during polishing. , The temperature difference and the internal pressure are constant, so flatness is easy to obtain. However, since the temperature difference inside and outside the room partitioned by each rim is uniform, the flatness and No distortion in sphere. Therefore, even for large products, time stability and ambient Dramatically improved shape and dimensional stability against temperature changes, and A large-diameter mirror that can be used for laser fusion, astronomy, etc. Also, it is possible to monitor the light from the back of a large product such as a prism type. Wear. Also, the front and back surfaces can have different shapes, for example, the front surface can be a flat mirror and the back surface can be Multi-functional use such as making the surface a spherical mirror is also possible.

[Brief description of drawings]

FIG. 1 is a perspective view in which a part of upper and lower mirror parts of a lightweight mirror made of quartz glass for use in the present invention is cut away.

FIG. 2 is a plan view of FIG.

3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a perspective view showing an embodiment of a rim portion.

FIG. 5 is a plan view showing an embodiment of a rim portion.

FIG. 6 is a conventional lightweight mirror.

FIG. 7 is a conventional lightweight mirror.

[Explanation of symbols]

1 Double-sided quartz glass lightweight mirror 2 Surface plate (surface mirror) 3 Back side (back side mirror) 4 rim part 5 through holes 6 outer ring

Claims (2)

[Scope of utility model registration request] 1. A honeycomb structure having a front surface mirror 2, a rim portion 4 and a back surface mirror 3, and a rim portion 4 supporting the upper and lower mirror surfaces has a circular or polygonal cross section, and a through hole 5 is formed on each rim surface. A double-sided quartz glass lightweight mirror provided. 2. A honeycomb structure having a front surface mirror 2, a rim portion 4, a back surface mirror 3 and an outer peripheral ring 6 and having a circular or polygonal cross-sectional shape of the rim portion 4 for supporting the upper and lower mirror surfaces, and each rim surface has A double-sided quartz glass lightweight mirror with a through hole 5.