Optical: systems and elements – Mirror – Including specified control or retention of the shape of a...
Patent
1995-04-07
1996-10-08
Nguyen, Thong
Optical: systems and elements
Mirror
Including specified control or retention of the shape of a...
359846, 359514, 65 36, 65 54, G02B 508
Patent
active
055637434
ABSTRACT:
The invention provides a light-weight base body of a reflecting mirror such as a mirror in a reflecting astronomical telescope, which is very stable not only thermally but also mechanically and is highly resistant against adverse environmental influences. The mirror base is composed of a porous foamed disc body of fused quartz glass or high-silica glass sandwiched by two plates of fused quartz glass or high-silica glass, of which one is made from transparent glass and serves to provide an optical surface having flatness or a specified curvature, and the side surface of the porous foamed disc body is protected against environmental influences by providing an air-tight sealing layer formed from a silicone rubber-based sealing agent or a thin sheet of fused quartz glass or high-silica glass.
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Ise Yoshiaki
Nakamura Tatsumasa
Okamoto Yoshiaki
Jr. John Juba
Nguyen Thong
Okamoto Optics Work, Inc.
Shin-Etsu Quartz Co, Ltd.
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