Optical: systems and elements – Protection from moisture or foreign particle – Sealing
Patent
1994-02-17
1995-10-24
Dzierzynski, Paul M.
Optical: systems and elements
Protection from moisture or foreign particle
Sealing
359846, 359848, 65 36, 65 54, G02B 508
Patent
active
054615119
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
Dzierzynski Paul M.
Jr. John Juba
Okamoto Optics Work, Inc.
Shin-Etsu Quartz Co., Ltd.
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