Accession Number : AD0292974

Title :   IMPROVEMENTS IN GRADED, NEUTRAL-DENSITY FILMS FOR ATTENUATION OF VISIBLE LIGHT BY OPHTHALMIC LENSES

Corporate Author : THOMPSON OPTICAL ENGINEERING CO LOS ANGELES CALIF

Personal Author(s) : FRAZER,ROBERT E.

Report Date : NOV 1962

Pagination or Media Count : 1

Abstract : IN AN EFFORT TO DERIVE GREATER PROTECTION TO THE VISUAL MECHANISM UNDER ADVERSE CONDITIONS, A SERIES OF METALS WERE EVALUATED AS OPTICAL NEUTRALS IN THE VISIBLE AND NEAR IR and UV. The most promising of these was titanium deposited as a neutral wedge on the concave surfaces of uncorrected ophthalmic lenses. Operational problems and the effect of graded-density variables encountered in depositing two-layer systems are discussed and some solutions are offered. (Author)

Descriptors :   *EYEGLASSES, *OPTICAL FILTERS, COATINGS, DENSITY, EVAPORATION, LENSES, MONOXIDES, OPTICAL COATINGS, SILICON COMPOUNDS, TITANIUM, VACUUM APPARATUS

Distribution Statement : APPROVED FOR PUBLIC RELEASE