Sorting machine using dual frequency optical detectors

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

1996-04-04

1997-05-20

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

056314604

ABSTRACT:
A photo-optical detector for use in a multi-chromatic sorting machine, each detector including at least two separate photodiode materials responsive to a different spectral range and a multi-peak 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.

REFERENCES:
patent: 5124553 (1992-06-01), Hilliard et al.
patent: 5508512 (1996-04-01), Gray et al.

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