LIMITATIONS IN DETECTION OF CELESTIAL BODIES EMPLOYING ELECTRONICALLY SCANNED PHOTOCONDUCTIVE IMAGE DETECTORS
AEROSPACE RESEARCH LABS WRIGHT-PATTERSON AFB OH
Pagination or Media Count:
Theoretical limitations in the detection of celestial bodies by means of photoconductive sensors are investigated. Applicable simplified basic equations are derived for the maximum apparent magnitude number of a celestial body that is detectable with the commercially available vidicon tube, a assuming the most optimistic conditions and b as determined by background radiation during the day and the night, load resistor noise and other practical limitations. The equations are extended to cover the possible gain in sensitivity obtainable by using preamplification with additional image converter type tubes, and by integration over several scanning fields. The schematics of an easily constructed very sensitive experimental vidicon system used for the investigation are appended.
- Electrooptical and Optoelectronic Devices