Abstract

Transparent coatings of a number of luminescent materials have been deposited on glass surfaces by chemical reaction of the components in the vapor state. The best of these so far obtained is zinc sulfide. Arsenic, copper, manganese, phosphorus, or zinc have been successfully introduced as activators. Under cathode ray excitation, some of these have given brightness as high as 40 foot-lamberts at 20 kv and 1 microampere per sq cm. The uv response of these films is low, but varies with the conditions of preparation. The properties of these nonscattering phosphor screens are described and their advantages over powder phosphors considered.

© 1955 Optical Society of America

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