Optical glass with varying refraction index
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United States of America Patent
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Sep 28, 1999
Grant Date -
N/A
app pub date -
Oct 28, 1997
filing date -
Jan 18, 1995
priority date (Note) -
Expired
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Abstract
Optical glasses or lenses are described having a refractive index that varies as a function of at least one coordinate, which is made from a starting material with a constant refractive index by ion exchange. Greater index gradients than with the prior art are achieved by special compositions and ion exchange baths intended therefor. In addition, the stability of the glasses is increased.
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