发明名称 |
OPHTHALMIC SEGMENT GLASS WITH HIGH ND |
摘要 |
The present invention relates to very high refractive index glasses (1.78 &l t; n < 1.83), having the following composition of oxides, expressed in percent ages by weight :SiO220- < 27B2O35-11Li2O2-8Na2O0-5K2O0-5BaO7-15CaO0-11La2O37-1 2PbO7- 20TiO27-14ZrO20-5Nb2O5 > 8-16with: Li2O+Na2O+K2O > 6BaO+CaO+La2O3 > 27TiO2+Nb2O5+PbO > 29,to their use for the production of segments for multifocal corrective lenses and to multifocal corrective lenses incorporati ng at least one such segment in their structure.
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申请公布号 |
CA2408225(A1) |
申请公布日期 |
2002.09.19 |
申请号 |
CA20012408225 |
申请日期 |
2001.03.13 |
申请人 |
CORNING INCORPORATED |
发明人 |
COMTE, MARIE;MARQUES, PAULO |
分类号 |
G02C7/02;C03C3/072;G02C7/06;(IPC1-7):C03C3/072 |
主分类号 |
G02C7/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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