Sorting machine using dual frequency optical detectors

Details Sorting machine using dual frequency optical detectors Sorting machine using dual frequency optical detectors

1995-01-24

1996-04-16

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250224, 209580, 356425, B07C 5342, G01J 350, G01N 2127

Patent

active

055085121

ABSTRACT:
A photo-optical detector for use in a multichromatic sorting machine, each detector including at least two separate photodiode materials responsive to a different spectral range and a multipeak optical filter having transmission response characteristics that are respectively defined in a frequency spectrum of the respective spectral ranges of the materials. The sorting machine using such detectors can be selectively programmed using the various resulting signals from the detectors after appropriate amplification and threshold detection to cause resulting ejection mechanism activation.

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Infrared Detectors 1994, p. 8 entitled "J16Si Series Silicon/Germanium `Sandwich` Detectors", EG&G Judson, Copyright 1993.

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