| 摘要 |
<p>An optical glass having optical constants of a refractive index (nd) within a range from 1.50 to 1.65 and an Abbe number (nu d) within a range from 50 to 65 and a glass transition temperature (Tg) of 400° C. or below wherein the shortest wavelength (lambda 80) at which transmittance is 80% is 370 nm or below.</p> |
