Quartz glass plates with high refractive index homogeneity
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United States of America Patent
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Apr 29, 2003
Grant Date -
N/A
app pub date -
Apr 27, 2001
filing date -
Oct 28, 1998
priority date (Note) -
Expired
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Abstract
A method produces homogenous quartz glass plates without streaks. The method is applied to starting quartz glass body which has an X--X geometrical axis and good refractive index homogeneity in its central area, and a refractive index homogeneity decreasing as the axis lies further from a central area. The body is divided into at least two concave parts by longitudinal cuts parallel to the axis once the central area has been processed out of the body. The parts are placed separately in corresponding molds and heated therein such that they are molded to form quartz glass plates having a desired thickness.
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