| 摘要 |
An optical article, for example, a lens, window or mirror, at least part of the surface of which, and preferably the whole of which, is an inorganic oxide glass having a P2O5 content of at least 52 mole %, and preferably 55 to 68.5 mole %, an alkaline earth content of 2.7 to 20 mole %, and a transformation temperature of not greater than 300 DEG C, the glass optionally containing B2O3 and at least one alkali metal oxide. |
