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Proceedings Paper

Low Light Level Imaging Devices For The Middle Ultraviolet
Author(s): G. Carruthers; J. Kervitsky; G. Hicks; C. Opal
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Paper Abstract

Electronic imaging devices based on the magnetically-focused, internal-optic Schmidt image converter concept, previously used at NRL for the vacuum ultraviolet, have been developed with cesium telluride photocathodes for use in the middle ultraviolet (2000-3000 A). These devices are intended primarily for flame and mid-UV source obser-vations, but also have applications to astronomy and to planetary atmosphere studies. Three versions of these devices have been constructed and tested: (1) a single-stage image converter with a phosphor/fiber optic output, for film recording or coupling to a low-light-level television camera tube, (2) an image converter incorporating a micro-channel intensifier stage with proximity focusing of the output onto a phosphor screen, and (3) same as (2) except with magnetic focusing from the microchannel plate output onto the phosphor screen. The latter two devices can be used with direct viewing of the phosphor output, or with lens coupling to a film camera or television camera tube. They can also be fiber-optically coupled to a CCD array. In each case, single-photo-electron events are detectable. Cesium telluride photocathodes appear to be significantly more stable in the presence of small leaks and outgassing than are cesium antimonide photocathodes. Therefore, electrographic recording should be easier with the Cs2Te photocathodes, and preliminary investigations are being initiated.

Paper Details

Date Published: 27 July 1976
PDF: 7 pages
Proc. SPIE 0078, Low Light Level Devices for Science and Technolgy, (27 July 1976); doi: 10.1117/12.954786
Show Author Affiliations
G. Carruthers, Naval Research Laboratory (United States)
J. Kervitsky, Naval Research Laboratory (United States)
G. Hicks, Naval Research Laboratory (United States)
C. Opal, Naval Research Laboratory (United States)

Published in SPIE Proceedings Vol. 0078:
Low Light Level Devices for Science and Technolgy
Charles Freeman, Editor(s)

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