Optical sheet for use in manufacturing a cylindrically...

Details Optical sheet for use in manufacturing a cylindrically... Optical sheet for use in manufacturing a cylindrically...

2005-05-17

2005-05-17

Sugarman, Scott J. (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

C351S041000, C351S177000

Reexamination Certificate

active

06893126

ABSTRACT:
A plano-convex optical sheet having a positive power including:a substantially planar inner surface;opposed lateral edges, anda thickness s that is decreasing proceeding from a transversal central line passing through the geometric center of the optical sheet towards said opposed lateral edges along a portion of predetermined width w of the optical sheet, so as to define a convex outer surface having a curvature such that the optical sheet is capable of providing once bent a cylindrically shaped optically correct visor.

REFERENCES:
patent: 4547049 (1985-10-01), Cotie
patent: 6010217 (2000-01-01), Houston et al.
patent: WO 9703579 (1997-02-01), None

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