Method of manufacturing optical glass element, and optical glass element manufactured using the method
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United States of America Patent
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Feb 28, 2006
Grant Date -
Mar 18, 2004
app pub date -
Aug 28, 2003
filing date -
Jun 12, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of manufacturing an optical glass element for which flatness and smoothness of the surfaces of the optical glass element can be improved while securing the similarity of the cross-sectional shape of the optical glass element to that of the mother glass, and for which continuous production involving few steps can be carried out, and an optical glass element manufactured using the method. A mother glass is prepared, which has a cross-sectional shape substantially similar to a desired cross-sectional shape of the optical glass element, and the mother glass is drawn while heating to a predetermined temperature such that the mother glass has a viscosity of 105 to 109 poise.
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