Method of casting optical surfaces on lens blanks

Details Method of casting optical surfaces on lens blanks Method of casting optical surfaces on lens blanks

1985-01-28

1985-12-31

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Reshaping or treatment of an optical preform

51284R, 425808, B29D 1100

Patent

active

045620180

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.

REFERENCES:
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patent: 3806079 (1974-04-01), Beattie
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patent: 4113224 (1978-09-01), Clark et al.
patent: 4118853 (1978-10-01), Mignen
patent: 4118898 (1978-10-01), Godot
patent: 4188353 (1980-02-01), Neefe
patent: 4254065 (1981-03-01), Rathowski
patent: 4307046 (1981-12-01), Neefe

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