Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses
Patent
1977-08-11
1979-01-23
Corbin, John K.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
351 83, 351 92, 351154, G02C 100, G02C 108, G02C 500
Patent
active
041357922
ABSTRACT:
Warpage-free spectacles comprised of plastic lenses and plastic frames wherein the frames are constructed of materials having the same or lower tensile elastic modulus and/or the same coefficient of thermal expansion as the lens material.
REFERENCES:
patent: 3243249 (1966-03-01), Lissac
patent: 3549248 (1970-12-01), Schuler
patent: 3702218 (1972-11-01), Manhire
patent: 3708567 (1973-01-01), Hampel
Deeg Emil W.
Travnicek Edward A.
American Optical Corporation
Berkenstock, Jr. H. R.
Bovernick Rodney B.
Corbin John K.
Duggan Jeremiah J.
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