Title:
SURFACE CASTING ONTO A POLYCARBONATE PHOTOCHROMIC SUBSTRATE
Document Type and Number:
WIPO Patent Application WO2007145611
Kind Code:
A8
Abstract:
A system and method for providing photochromic segmented multifocal optical lenses. A latex primer formulation is provided for effectuating adhesion of a surface casting composition onto a lens having a photochromic coating. The method provides efficient, cost effective production of durable photochromic segmented lenses, via secure adhesion of a surface casting layer onto a photochromic substrate while maintaining desirable optical characteristics. A composite optical lens is advantageously formed having a photochromic base lens, a primer composition bonded to a convex surface of said base lens, and a cured casting composition bonded to said primer composition layer. The cured casting formulation includes a segment region to impart multifocal qualities onto the resultant composite optical lens.
Inventors:
BERZON RONALD A (US)
JOHNSON ERIC (US)
MOSSE HERBERT (US)
JOHNSON ERIC (US)
MOSSE HERBERT (US)
Application Number:
PCT/US2006/022153
Publication Date:
June 12, 2008
Filing Date:
June 07, 2006
Export Citation:
Assignee:
ESSILOR INT (FR)
BERZON RONALD A (US)
JOHNSON ERIC (US)
MOSSE HERBERT (US)
BERZON RONALD A (US)
JOHNSON ERIC (US)
MOSSE HERBERT (US)
International Classes:
G02B3/10; B29D11/00
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