专利名称：CASTING OPTITHALIMIC LENSES发明人：P.R. RAMIREZB,B. CANTERBURY申请号：AU6957081申请日：19810415公开号：AU6957081A公开日：19811203
摘要：Cast multifocal lenses are produced from ledged casting pieces molded from amaster die having a molding surface made up of juxtapositioned die components eachprecision surfaced to a curvature and finish corresponding to a multifocal surface desiredto be cast upon a lens and relatively prearranged according to desired height andposition of cast lens ledging.
申请人：AMERICAN OPTICAL CORP.
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