发明名称 |
POLYMER BIFOCAL LENS PRODUCTION PROCESS |
摘要 |
A polymeric bifocal lens production process including the steps of selecting a single vision lens or lens blank (2) with a convex surface, and a bifocal mould (6) with a smaller radius of curvature; roughening the convex surface of the lens or lens blank; assembling the mould and lens or lens blank with catalysed monomer between the mould and the lens or lens blank; holding the lens or lens blank and the mould in position relative to one another so that the lens or lens blank contacts the mould; curing the monomer; removing the mould and post-curing to relieve stress in the bifocal lens and to allow the cured monomer to shrink in a controlled manner thereby causing a power decrease in the bifocal segment, whereby the cured monomer cast on to the lens or lens blank is of higher refractive index than the lens or lens blank. <IMAGE> |
申请公布号 |
AU2963392(A) |
申请公布日期 |
1993.06.03 |
申请号 |
AU19920029633 |
申请日期 |
1992.11.26 |
申请人 |
PILKINGTON VISIONCARE INC. |
发明人 |
MATTHEW JOHN CUTHBERTSON;PHILIP HORLEY SQUIRES |
分类号 |
B29C35/02;B29C37/00;B29C70/78;B29C71/02;B29D11/00;G02C7/06 |
主分类号 |
B29C35/02 |
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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