Abstract
Publisher Summary This chapter describes evaluation of image intensifier tubes for use in astronomical observations. The results reported in this chapter were obtained as part of a program, designed to evaluate image intensifier tubes for use in astronomical observations. Methods used in the past to evaluate the performance of image intensifiers have tended to be too simple to give the type of information an astronomer needs. One must be able to predict which observations will be practicable, and also to evaluate the results of observations in a correct photometric manner. The method employed, which takes into account the noise level limiting the smallest detail to be seen, is based on the information theory as adapted to the case of optical imaging. Moreover, the noise-power spectrum was measured by exposing to uniform density all the recording systems described above. The deviation of the density of small areas from the mean was measured directly by scanning the plate with a microphotometer.
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