Method of casting optical surfaces on lens blanks
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United States of America Patent
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-
Dec 31, 1985
Grant Date -
N/A
app pub date -
Jan 28, 1985
filing date -
Jan 28, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention is a method of making cast lens blanks with an optical surface on one surface. A cylindrical resinous mold having an optical surface surrounded by an orientation ring present in the bottom is filled with the lens monomer. The liquid monomer is polymerized to form a solid. The lens blank is removed from the mold by cutting away the sides of the mold. The back of the blank is trued to the orientation ring by lathe cutting.
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Cited Art Landscape
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