Abstract

The brightness and resolution characteristics of P53 phosphor screens prepared by cataphoretic coating using a 0.9 μm average particle size powder are described and compared to sputtered and single‐crystal screens as well as to 2.5 μm P53 screens. It is shown that the single‐crystal and sputtered screens have spot size capabilities better than 0.17 mil (full wave half amplitude) compared to 0.25 mil for the 0.9 μm screens. However, brightness of the particulate screens is substantially superior (>40%) to the sputtered screens, which were better than single‐crystal screens. Resolution was measured on the screen without the use of a complete tube assembly with its electron gun. Instead, contact printer technology, using a United States Air Force test pattern placed in contact with the screen, and an enlarged image made by transmitted light was viewed to select the just barely resolvable pattern.

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