Optical: systems and elements – Polarization without modulation – Polarization by reflection or refraction
Patent
1993-09-14
1995-07-18
Lerner, Martin
Optical: systems and elements
Polarization without modulation
Polarization by reflection or refraction
264 13, 264 17, 264 132, 351 49, 351163, 359490, 359491, G02B 530, G02B 108, G02C 710, G02C 712
Patent
active
054347076
ABSTRACT:
Plastic lenses having substantially no optical power and a light-polarizing layer therein are prepared by shaping composite laminate of the light-polarizing layer between opposed sheets of thermoplastic material by heating and pressing the laminate between opposed shaping molds (platens), the platens having predetermined radii of curvature for the production of a lens having substantially no optical power. Shaping is effected under conditions of heating and pressing sufficient to cause flow of the thermoplastic sheets and conformation thereof to the respective curvatures of the forming surfaces of the platens. The lenses are especially suited as sunglass lenses for spectacles.
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Dalzell William H.
Gettens Nancy J.
Loshak Igor
McCarthy Carole L. G.
Lerner Martin
Polaroid Corporation
Xiarhos Louis G.
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