Optical glass
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United States of America Patent
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Jun 1, 2004
Grant Date -
Oct 17, 2002
app pub date -
Jan 29, 2002
filing date -
Jan 29, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Optical glasses and optical articles comprised of the optical glass are disclosed. One of which comprises, by means of weight percentages, more than 32 percent and not more than 45 percent P.sub.2 O.sub.5, more than 0.5 percent and not more than 6 percent Li.sub.2 O, more than 5 percent and not more than 22 percent Na.sub.2 O, 6-30 percent Nb.sub.2 O.sub.5, 0.5-10 percent B.sub.2 O.sub.3, 0-35 percent WO.sub.3, 0-14 percent K.sub.2 O, and 10-24 percent Na.sub.2 O+K.sub.2 O, and the total of all the above components is not less than 80 percent.
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