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Photoelectric detector used for object sorting

In radiometric separators the decision about the sample quality is based on the analysis of the output signal. In this paper we present a general description and applications of the geometrical and physical factors concept in the analysis of photodetector output signals as function of technical parameters and physical characteristics of the source, the detector and the sample. The method of a group "average" spectrum is proposed for the purpose of effective accounting of various spectral properties of the samples.