Invention Grant
US4734389A Highly refractive optical glass with refractive indices >1.83 and Abbe
numbers <25, and with very good chemical stability
失效
折射率> 1.83，阿贝数<25的高折射光学玻璃，具有很好的化学稳定性
- Patent Title: Highly refractive optical glass with refractive indices >1.83 and Abbe numbers <25, and with very good chemical stability
- Patent Title (中): 折射率> 1.83，阿贝数<25的高折射光学玻璃，具有很好的化学稳定性
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Application No.: US827066Application Date: 1986-02-07
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Publication No.: US4734389APublication Date: 1988-03-29
- Inventor: Danuta Grabowski , Ludwig Ross , Volkmar Geiler
- Applicant: Danuta Grabowski , Ludwig Ross , Volkmar Geiler
- Applicant Address: DEX Mainz
- Assignee: Schott Glaswerke
- Current Assignee: Schott Glaswerke
- Current Assignee Address: DEX Mainz
- Priority: DEX3504625 19850211
- Main IPC: C03C3/062
- IPC: C03C3/062 ; C03C3/064 ; C03C3/068 ; C03C3/07 ; C03C3/072
Abstract:
A highly refractive optical glass (n.sub.d .gtoreq.1.83) with high dispersion (v.sub.d .ltoreq.25) and very good chemical stability at relatively low density (.delta..ltoreq.3.5 g/cm.sup.3) consists of (in weight percent) SiO.sub.2 19-25, Na.sub.2 O 7-10, K.sub.2 O 4-7, Cs.sub.2 O 0-12, Cao 0.5-2.0, BaO 9-15, TiO.sub.2 25-30, ZrO.sub.2 0-6, Nb.sub.2 O.sub.5 16-20, WO.sub.3 0-3, with Nb.sub.2 O.sub.5 :TiO.sub.2 =0.6-0.71.
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