Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Reexamination Certificate
2006-04-18
2006-04-18
Sugarman, Scott J. (Department: 2873)
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
C351S166000, C351S044000, C351S049000
Reexamination Certificate
active
07029118
ABSTRACT:
An improved ten-layer performance polarized lens for sunglasses. The lens design maximizes visual acuity while minimizing blue-light transmission using a multi-layer dielectric mirror to reduces glare and overall light transmission, two layers of high-contrast blue-blocking amber CR-39 plastic or polycarbonate, sandwiching a polarizing layer. An outer hydrophobic overcoat is also provided to protect against haze, delamination, and smudging, The foregoing layers are arranged to provide a balanced light transmission profile optimum for use on the water in which 100% of UV-A & B light is absorbed to at least 400 nm. The resulting dielectric-mirrored sunglass lens reduces both overall light transmission and ocular photochemical damage.
REFERENCES:
patent: 4878748 (1989-11-01), Johansen et al.
patent: 5694240 (1997-12-01), Sternbergh
patent: 5702819 (1997-12-01), Gupta et al.
patent: 6220703 (2001-04-01), Evans et al.
patent: 6334680 (2002-01-01), Larson
Philip Baumeister and Gerald Pincus, “Optical Interference Coatings”, Scientific American, Dec., 1970.
http://web.archive.org/web/20001008003354/www.nacl.com/custom.htm.
CRC Handbook of Chemistry and Physics, 85th Edition, 2004-2005, p. 10-217.
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