| 发明名称 |
High-refractive-index optical glasses having refractive indexes of from 1.79-1.82, Abbe numbers of >/= 32 and densities of </= 4.0 |
| 摘要 |
The high-refractive-index optical glasses have refractive indexes of from 1.79-1.82, Abbe numbers of >/= 32 and densities of </= 4.0 and are suitable for reading areas and distance areas of spectacles. They have the following composition in % by weight: SiO2 7.5-13.5; B2O3 13-19; Al2O3 0-4; Li2O 0-3; Na2O 0-4; K2O 0-4; CaO 4-18; MgO 0-6; SrO 0-14; BaO 0-14; PbO 0-15; ZnO 0-7; La2O3 13-30; Y2O3 0-6; Gd2O3 0-6; ZrO2 3-8; TiO2 5-13; Nb2O5 5-12; WO3 0-6; Ta2O5 0-6.
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| 申请公布号 |
DE3201344(A1) |
申请公布日期 |
1983.07.28 |
| 申请号 |
DE19823201344 |
申请日期 |
1982.01.18 |
| 申请人 |
SCHOTT GLASWERKE |
发明人 |
MENNEMANN,KARL,DR.;GLIEMEROTH,GEORG,DIPL.-ING.DR.;GEILER,VOLKMAR |
| 分类号 |
C03C3/064;C03C3/066;C03C3/068;C03C3/072;C03C3/074;G02C7/00;(IPC1-7):C03C3/08;C03C3/10;C03C3/30 |
主分类号 |
C03C3/064 |
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