The sensitivity of differing space photographic imaging concepts is compared in terms of the photo-electron population of the discrete picture element. The velocity of the scanning beam is included for storage surfaces. The photon population has been photometrically established for black-body temperatures of interest. The method is illustrated for a slow-scan vidicon for which the quantum efficiency is shown to be n = 0.4.
Leonard R. Malling,
"Ultimate Sensitivity of Space-Camera Imaging Devices with Particular Reference to the Slow-Scan Vidicon," Optical Engineering 4(6), 406272 (1 September 1966). https://doi.org/10.1117/12.7971332