| 摘要 |
<p>An optical glass having a small photoelastic constant ( beta ) suitable for parts for polarizing optical system and light polarization control elements and having a refractive index (nd) within a range from 1.60 to 1.68 and an Abbe number ( nu d) within a range from 40 to less than 65 comprises, as atoms constituting the optical glass, <TABLE> <IMAGE></p> |
