Computer Science – Performance
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98..622h&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 98, June 1986, p. 622-626. NSERC-supported research.
Computer Science
Performance
8
Astronomical Spectroscopy, Imaging Techniques, Radiation Counters, Charge Coupled Devices, Data Reduction, Equipment Specifications, Quantum Efficiency
Scientific paper
The design, operation, and performance of an imaging photon-counting system (designated Foton), with a 500 x 488 pixel format and 33 ms time resolution, are described. The system's detector is a two-stage microchannel intensifier fiber-optically coupled to a CCD camera operating at standard video rate. With an extended red S-20 photocathode the detector is sensitive from 2000 A to 9000 A, with a peak quantum efficiency of 15 percent at 5000 A. As all photon events are permanently recorded, it is possible to produce sequences of short-exposure images, so that periodic or rapidly varying phenomena may be studied. The principal advantages of the system, which can be used for spatially resolved spectroscopy and narrow-band imaging at a wide range of signal-to-noise levels, as well as for speckle observations, are its small size and weight, large image format, and high dynamic range. Block diagrams are included.
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