Optical glass and optical element
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United States of America Patent
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Mar 19, 2013
Grant Date -
Jun 30, 2011
app pub date -
Dec 22, 2010
filing date -
Dec 25, 2009
priority date (Note) -
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Abstract
An object of the present invention is to provide optical glass having improved glass-devitrification resistance and moldability without causing reduction in refractive index, and also provide an optical element using the optical glass as a raw material. Specifically, the present invention provides an optical glass containing components of, by mol %: B2O3: over 60% through 75%; Bi2O3: 24% to 39%; La2O3: 7% or lower; Gd2O3: 7% or lower; and ZrO2: 7% or lower.
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