发明授权
- 专利标题： Fast-fading index-corrected photochromic glass compositions
- 专利标题（中）： 快速褪色指数校正光致变色玻璃组合物
-
申请号： US522494申请日： 1974-11-11
-
公开(公告)号： US3957499A公开(公告)日： 1976-05-18
- 发明人: Clark V. DeMunn , David J. Kerko , Ralph A. Westwig
- 申请人： Clark V. DeMunn , David J. Kerko , Ralph A. Westwig
- 申请人地址： NY Corning
- 专利权人： Corning Glass Works
- 当前专利权人： Corning Glass Works
- 当前专利权人地址： NY Corning
- 主分类号： C03C3/102
- IPC分类号： C03C3/102 ; C03C3/11 ; C03C3/118 ; C03C4/06 ; G02C7/10 ; C03C3/26 ; C03C3/08 ; G02B1/08
摘要：
Photochromic glasses having index of refraction values (n.sub.D) in the range from 1.52-1.54, compositions comprising, in weight percent, about 49-60% SiO.sub.2, 2-9% Al.sub.2 O.sub.3, 15-18% B.sub.2 O.sub.3, 6-12% Na.sub.2 O, 9-18% ZrO.sub.2, 0.5-0.9% Ag, 0.5-0.8% Cl, 0.010-0.030% CuO, 0.5-1% PbO, and 1-2% F, and rapid fading characteristics such that at least about 65% of the optical density gained during darkening is lost within a five-minute fading interval, are disclosed.
公开/授权文献
- US5588591A Heat dissipation unit 公开/授权日：1996-12-31
信息查询
