proximity-focused tube
proximity-focused tube
[präk′sim·əd·ē ¦fō·kəst ′tüb] (electronics)
A type of image tube in which electrons are rapidly accelerated across a narrow gap, 1.5 to 3.5 millimeters wide, between the photocathode and the phosphor screen, both deposited on plane-parallel optical windows.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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