Abstract
Over the last ten years, the application of image intensifiers in astronomical observations has become a routine procedure. This year at Kitt Peak National Observatory, 45% of the time on the 2.1-meter telescope is scheduled for image intensifier work. Most of this is work that requires a dark sky for spectroscopic observa-tions of faint stars and galaxies, and so nearly 90% of the available dark time on the telescope is scheduled for observations with some sort of image intensifier being the primary detector. Similar scheduling of intensifiers can be found at many observatories around the world. I would like to review the current application of some of these devices in astronomy and discuss their advantages and limitations.
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