Computer Science – Performance
Scientific paper
Jun 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977opten..16..237t&link_type=abstract
Optical Engineering, vol. 16, May-June 1977, p. 237-240.
Computer Science
Performance
2
Cadmium Tellurides, Infrared Detectors, Mercury Tellurides, Metal Oxide Semiconductors, Photodiodes, Volt-Ampere Characteristics, Capacitance, Low Noise, Near Infrared Radiation, Performance Tests, Temperature Effects
Scientific paper
Infrared detectors using mercury-cadmium telluride photodiodes capable of operating at moderate temperatures are described. Features of the diodes include: ability to detect infrared in the 1.5 and 2.0 micrometer region; low noise current over a range of frequency; and a current response which is linear with incident power. Low capacitance of the mercury-cadmium telluride photodiodes permits high frequency operation; while in operations involving large numbers of the diodes, the array displays excellent uniformity of detection and responsivity. Tests indicate that detectors using photodiodes with cutoffs in the 2.0 to 2.3 micrometer spectral range have achieved increasingly high detectivities as temperature is decreased from 300 K to 193 K. This high detectivity rate at moderate temperatures is important for satellite applications, since cooling of detectors requires large and heavy radiative coolers.
Tredwell T. J.
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