发明名称 METHOD OF PRODUCING MOULDS FOR ORGANIC POLYMER MULTIFOCAL LENSES
摘要 A method is disclosed for constructing a glass mould, and particularly the primary glass mould member, for use in casting multifocal, ophthalmic lenses from organic polymers. The method comprises pressing a glass segment (60) with a cavity (62), removing the base portion (66) of the segment to form a perforation, mounting the perforated segment (70) in a counter-sink (84) on a second glass body (82), and fusing the assembly to form a blank for finishing. For trifocal lenses, a composite, perforated segment (120) is formed and sealed in a counter-sink (132) to form a blank.
申请公布号 AU4272989(A) 申请公布日期 1990.04.26
申请号 AU19890042729 申请日期 1989.10.10
申请人 CORNING INCORPORATED 发明人 MILFORD LELAND BUCKLEY
分类号 G02C7/06;B29C33/38;B29D11/00;G02C13/00 主分类号 G02C7/06
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