发明授权
- 专利标题: Optical glass
- 专利标题(中): 光学玻璃
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申请号: US309360申请日: 1989-02-13
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公开(公告)号: US4996173A公开(公告)日: 1991-02-26
- 发明人: Kazuo Tachiwana
- 申请人: Kazuo Tachiwana
- 申请人地址: JPX Tokyo
- 专利权人: Hoya Corporation
- 当前专利权人: Hoya Corporation
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX63-47117 19880229
- 主分类号: C03C3/062
- IPC分类号: C03C3/062 ; C03C3/064 ; C03C3/066 ; C03C3/07 ; C03C3/072 ; G02B1/00
摘要:
The optical glass of the present invention comprising SiO.sub.2, alkali metal oxides, P.sub.2 O.sub.5 and Nb.sub.2 O.sub.5 has optical properties of 1.70 or more in refractive index nd and 30 or less in Abbe's number .nu.d and is superior in devitrification resistance and stability.
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