Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1996-09-17
1998-12-08
Font, Frank G.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351169, 351171, G02C 706
Patent
active
058478035
ABSTRACT:
A progressive optic has an optical preform wherein the radius of curvature of the surface is altered by forming discrete spherical portions across the surface. A thin intermediate layer, having a different refractive index from the optical preform, is then cast over the formed optical preform surface. The optical preform having the thin intermediate layer is then cast with a resin superstrate layer which restores the curve of the optic. Each spherical section, defined by the spherical portions and corresponding portions of the outer surface of the superstrate layer, alters the spherical power of the adjacent spherical section by about 0.03 D to 0.05 D,
REFERENCES:
patent: 2405989 (1946-08-01), Beach
patent: 2878721 (1959-03-01), Kanolt
patent: 3687528 (1972-08-01), Maitenaz
patent: 4056311 (1977-11-01), Winthrop
patent: 4240719 (1980-12-01), Guilino
patent: 4315673 (1982-02-01), Guilino
patent: 4418992 (1983-12-01), Davenport et al.
patent: 4472036 (1984-09-01), Kitani
patent: 4606622 (1986-08-01), Fueter
patent: 4806010 (1989-02-01), Ewer et al.
patent: 4952048 (1990-08-01), Frieder et al.
patent: 5024517 (1991-06-01), Seidner
patent: 5042936 (1991-08-01), Guilino
patent: 5095079 (1992-03-01), Yean et al.
patent: 5123725 (1992-06-01), Winthrop
patent: 5258144 (1993-11-01), Yean et al.
patent: 5270745 (1993-12-01), Pedrono
patent: 5305028 (1994-04-01), Okano
patent: 5446508 (1995-08-01), Kitchen
The Random House Dictionary of the English Language, pp. 477 and 960, Random House, New York (1971).
Blum Ronald D.
Gupta Amitava
Font Frank G.
InnoTech, Inc.
Vierra-Eisenberg Jason D.
LandOfFree
Optic incorporating a power gradient does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optic incorporating a power gradient, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optic incorporating a power gradient will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-183508