Optical glass
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United States of America Patent
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-
Oct 7, 1980
Grant Date -
N/A
app pub date -
Jun 13, 1979
filing date -
Jun 21, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical glass of a B.sub.2 O.sub.3 --SiO.sub.2 --La.sub.2 O.sub.3 --Yb.sub.2 O.sub.3 system and additionally containing SnO.sub.2 is stable in spectral transmissivity, is scarcely liable to tinting and has high refractive and low dispersive characteristics.
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