Patent · US Expired

Optical lenses with selective transmissivity functions

US4952046A · kind A · utility

65Cited by

1References

10Claims

0Family size

Inventors

James B. Stephens · La Cañada Flintridge, US
Charles G. Miller · Branford, US
by Ann S. Miller, executrix · Pasadena, US

Key dates

Filing date	Jul 25, 1988
Grant date	Aug 28, 1990
Priority date	—
Expiry date	Jul 25, 2008

Classification

Technology area (CPC G)Physics
CPC primaryG02C7/04
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An opthalmic spectacle or contact sharp cut-on orange lens that improves visual acuity and substantially reduces eye damage in a bright sunlit environment. The lenses substantially eliminate ultraviolet radiation and blue light shorter than 515 nm. The ultraviolet radiation has been implicated as a cause of cateractogenisis. The blue light is implicated in senile macular degenerations, night blindness and snow blindness. The lens is substantially transparent to wavelengths greater than 636 nm which are most useful for high visual acuity in bright sunlit environment.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.