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Proceedings Paper

Microchannel Intensified Electrography
Author(s): Harry M. Heckathorn; George R. Carruthers
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Paper Abstract

Electrography is, in many respects, a nearly ideal electronic imaging technique. However, at very low light levels, although individual photoelectron events are in principle detectable in the film images, limitations are imposed by microphotometer and emulsion grain noise. The use of microchannel intensification allows individual photoelectron events to be unambiguously detectable and measurable, with little loss in achievable resolution. This significantly enhances the capabilities of electrographic detectors for use in imagery and spectrography of faint, diffuse objects or in applications which require a fast time response. We have conducted a quantitative study of the gains in detectivity and signal-to-noise ratio provided by this technique, through microphotometry and computer analysis of images of identical or similar laboratory light sources, using both unintensified and microchannel-intensified electrographic Schmidt cameras. We describe applications of the technique to far-ultraviolet wide-field-imaging and nebular spectrograph experiments, both of which have been used in sounding rocket flights and are planned for near-future Shuttle missions.

Paper Details

Date Published: 16 November 1982
PDF: 12 pages
Proc. SPIE 0331, Instrumentation in Astronomy IV, (16 November 1982); doi: 10.1117/12.933483
Show Author Affiliations
Harry M. Heckathorn, Naval Research Laboratory (United States)
George R. Carruthers, Naval Research Laboratory (United States)


Published in SPIE Proceedings Vol. 0331:
Instrumentation in Astronomy IV
David L. Crawford, Editor(s)

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