Fluorophosphate optical glass
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United States of America Patent
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Feb 5, 1991
Grant Date -
N/A
app pub date -
Sep 29, 1989
filing date -
Oct 6, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A fluorophosphate optical glass having optical constants, i.e. refractive index (nd) of 1.54 to 1.60 and Abbe number (.nu.d) of 68 to 75 and having abnormal partial dispersion represented by a relative partial dispersion of at least 0.537 is provided, which has a chemical composition (% by weight) comprising:
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