Optical glass
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United States of America Patent
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N/A
Issued Date -
Aug 23, 2007
app pub date -
Mar 9, 2005
filing date -
Mar 10, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An optical glass has a refractive index (nd) of 1.60 or over and excellent transmittance and internal quality. The optical glass comprises 0.1-4 mass % of Ta.sub.2O.sub.5 to total mass of glass calculated on oxide basis, has ratio of 0.95
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