Accession Number:

AD0270137

Title:

TRANSPARENT PHOSPHOR DEVELOPMENT

Descriptive Note:

Corporate Author:

WESTINGHOUSE ELECTRIC CORP ELMIRA N Y

Personal Author(s):

Report Date:

1961-10-31

Pagination or Media Count:

1.0

Abstract:

Cathodoluminescent films were made from Zn5B4O11 Mn, Zn,CdSCu, and KMgF3Mn phosphors. Of these, KMgF3 produces the most transparent and persistent films. The major advantages of these fluoride films over previously developed transparent phosphors are extreme transparency, long persistence, and ease of preparation on softglass substrates. Five inch diameter faceplates were coated with KMgF3 films, which are durable and water-resistant, by a one step vacuum deposition process such faceplates may be sealed directly to CRTs with no deterioration. The effects of composition and treatment on brightness, persistence and maintenance of output of this phosphor were extensively explored and improvements made in all 3 characteristics. The principle disadvantage of these KMgF3 films is their poor maintenance characteristics, which are worse than those of corresponding powder phosphors. Their low reflectivity and long persistence permit ssignals to be distinguished at higher ambient light levels than is possible with conventional P7 powder screens. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE