| 摘要 |
<p>Provided is an optical glass having mechanical characteristics suited to the manufacturing of high-quality optical elements while having the high refractive index and high dispersion characteristic of a refractive index nd of 2.02 or higher and an Abbé number vd of 19.0 or lower. An optical glass in the form of an oxide glass, characterized by comprising, denoted as cation percentages:
P 5+ 14 to 36%;
Bi 3+ 12 to 34%;
Nb 5+ 12 to 34%;
Ti 4+ 5 to 20%; and
W 6+ 0 to 22%;
wherein the total content of Bi 3+ , Nb 5+ , Ti 4+ , and W 6+ is equal to or greater than 50%; and in that the Knoop hardness is equal to or higher than 370, the refractive index nd is equal to or higher than 2.02, and the Abbé number vd is equal to or lower than 19.0. A glass material for press molding and an optical element comprised of this optical glass. A method for manufacturing a glass material for press molding comprising the step of mechanically processing this optical glass.</p> |
