Fluorosphosphate optical glass
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United States of America Patent
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May 21, 1991
Grant Date -
N/A
app pub date -
Nov 22, 1989
filing date -
Dec 1, 1988
priority date (Note) -
Expired
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Abstract
A fluorophosphate optical glass having optical constants, i.e. a refractive index of 1.45 to 1.54 and an Abbe number of 75 to 90, preferably 75 to 89.5, useful as a lens for an optical instrument to obtain a good quality image, is provided, which has a chemical composition (% by mole) comprising:
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