Method of producing a polarized lens and a casting die used...

Details Method of producing a polarized lens and a casting die used... Method of producing a polarized lens and a casting die used...

2007-02-13

2007-02-13

Vargot, Mathieu D. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Light polarizing article or holographic article

C264S001700, C264S002500, C427S163100

Reexamination Certificate

active

10478107

ABSTRACT:
A method of producing a polarized lens and a casting die used therein are provided to allow a polarized film to be securely positioned within a casting die and a polarized lens to be cast in a uniform density and be almost free from any distortion on the surface so as to secure the stable uniformity of a lens as produced, which method comprises the steps of hot-pressing a polarized film2that is formed into a shape substantially corresponding to one of mobile portions12into a curved shape adaptable into a curvature of the lens; descending one of mobile portions12so as to generate a recess H thereat; mounting the polarized film2as shaped with the curvature into the recess H and closing a casting die1; injecting a fused lens molding resin M into a cavity within the casting die1from a gate13with the lens molding resin M filled in a runner13aengaged to the casting die1; and taking out a prototype lens Lb in which the lens molding resin M is integrally jointed with the polarized film2when the molding resin M is cured.

REFERENCES:
patent: 5800744 (1998-09-01), Munakata
patent: 6165392 (2000-12-01), Kobuchi et al.
patent: 6220703 (2001-04-01), Evans et al.
patent: 6638450 (2003-10-01), Richard
patent: 904 345 (1954-02-01), None
patent: 0 552 498 (1993-07-01), None
patent: 2001-350122 (2001-12-01), None

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