Invention Grant
- Patent Title: Acidproof, hydrolysis-resistant optical and ophthalmic glass of low density
- Patent Title (中): 耐酸，耐水解的光学和眼镜玻璃密度低
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Application No.: US282787Application Date: 1981-07-13
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Publication No.: US4390638APublication Date: 1983-06-28
- Inventor: Karl Mennemann , Georg Gliemeroth , Volkmar Geiler
- Applicant: Karl Mennemann , Georg Gliemeroth , Volkmar Geiler
- Applicant Address: DEX Mainz
- Assignee: Schott Glaswerke
- Current Assignee: Schott Glaswerke
- Current Assignee Address: DEX Mainz
- Priority: DEX3026605 19800714
- Main IPC: G02C7/02
- IPC: G02C7/02 ; C03C3/064 ; C03C3/066 ; C03C3/068 ; C03C3/072 ; C03C3/074 ; C03C4/20 ; C03C13/04 ; G02B1/00 ; C03C3/08 ; C03C3/10
Abstract:
An optical and ophthalmic glass having an index of refraction of .gtoreq.1.69, an Abbe number of .gtoreq.37, and a density of .ltoreq.3.30 g/cm.sup.3, consists essentially of (in % by weight):______________________________________ SiO.sub.2 18-36 B.sub.2 O.sub.3 3-18 GeO.sub.2 0-8 Al.sub.2 O.sub.3 0-6, wherein SiO.sub.2 + B.sub.2 O.sub.3 + Al.sub.2 O.sub.3 + GeO.sub.2 25-39 P.sub.2 O.sub.5 0-14, wherein SiO.sub.2 + B.sub.2 O.sub.3 + Al.sub.2 O.sub.3 + GeO.sub.2 + P.sub.2 O.sub.5 = 30-44 Li.sub.2 O 0-12 Na.sub.2 O 0-14 K.sub.2 O 0-18 Li.sub.2 O + Na.sub.2 O + K.sub.2 O = 2-18 MgO 0-15 CaO 7-25 MgO + CaO 15-32 SrO 0-13 BaO 0-17 ZnO 0-15 PbO 0-10 SrO + BaO + ZnO + PbO 0-20 TiO.sub.2 3-14 Nb.sub.2 O.sub.5 0-13 WO.sub.3 0-10 TiO.sub.2 + Nb.sub.2 O.sub.5 + WO.sub.3 = 10-21 ZrO.sub.2 0-15, La.sub.2 O.sub.3 0-20 Y.sub.2 O.sub.3 0-16 Gd.sub.2 O.sub.3 0-16 Yb.sub.2 O.sub.3 0-10 La.sub.2 O.sub.3 + Y.sub.2 O.sub.3 + Gd.sub.2 O.sub.3 + Yb.sub.2 O.sub.3 = 0-20 Ta.sub.2 O.sub.5 0-13 HfO.sub.2 0-5 SnO.sub.2 0-6. ______________________________________
Public/Granted literature
- US6129407A Foldable cover and latch mechanism for pickup truck bed Public/Granted day:2000-10-10
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