发明名称 |
Method for manufacturing thin progressive addition lenses |
摘要 |
A method is provided for casting a progressive addition lens from: a mold incorporating a spherical portion and an add zone; a preformed lens having a convex curvature correlated with the concave curvature of the mold; and a polymerizable resin. The method includes the steps of: placing a predetermined volume of resin into a cavity of the mold; placing the preformed lens into the mold such that a layer of resin spreads out and covers any intervening space between the lens and the mold; and displacing superiorly or nasally by a predetermined magnitude the optical center of the preformed lens with respect to the geometrical center of the mold.
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申请公布号 |
US5480600(A) |
申请公布日期 |
1996.01.02 |
申请号 |
US19930036637 |
申请日期 |
1993.03.24 |
申请人 |
INNOTECH, INC. |
发明人 |
GUPTA, AMITAVA;BLUM, RONALD D. |
分类号 |
G02C7/06;B29D11/00;(IPC1-7):B29D11/00 |
主分类号 |
G02C7/06 |
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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