Glass manufacturing – Processes – With chemically reactive treatment of glass preform
Patent
1993-05-21
1994-12-20
Lindsay, Robert L.
Glass manufacturing
Processes
With chemically reactive treatment of glass preform
65 31, 65DIG4, 65 332, C03C 2300
Patent
active
053742915
ABSTRACT:
A method of processing a photosensitive glass includes exposing. Photosensitive glass by radiation from a laser whose oscillation wavelength lies within the range of wavelengths of exposing light to which the glass responds. Then, the exposed portions 1c are thermally developed and etched. Since a laser beam propagates with a high rectilinearity, the front and rear surfaces of thick photosensitive glass can be exposed without producing dimensional errors. Therefore, the etching accuracy is improved. Especially, where the front and rear surfaces of photosensitive glass are etched, both surfaces can be processed so as to form the same shape in them accurately. In addition, because almost all the energy of the laser radiation is used for exposure of the photosensitive glass, the energy is not wasted and so the efficiency is high.
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Entwicklungstendenzen bei der Applikation Von Lasern zur Veredlung Von Glaserzeugnissen, Ludwig Stadtler, Silikattechnik 41 (1990) Seiten 95 bis 99, plus English language concise explanation.
Takashi, Matsuura, "Photo Chemically Machinable Glass Ceramics", Practical Surface Technologies, No. 11, p. 1-7 (1988).
Kondo Nobuhiro
Matsumura Toshio
Niino Hiroyuki
Ono Hirokazu
Takahashi Tomoaki
Director--General of Agency of Industrial Science and Technology
Lindsay Robert L.
Seikosha Co. Ltd.
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