System and method for distinguishing an item from a group of ite

Details System and method for distinguishing an item from a group of ite System and method for distinguishing an item from a group of ite

1997-09-22

1999-10-12

Font, Frank G.

Optics: measuring and testing

By shade or color

356407, 3562394, 3562391, 209524, 209576, 209580, G01J 346, G01J 2125, G01N 2125, B07C 500, B07C 5342

Patent

active

059662174

ABSTRACT:
The present invention discloses an electromagnetic source which transmits electromagnetic radiation to an object. The electromagnetic radiation then either passes through the object or is reflected by the object depending upon the electromagnetic source and the type of the object. The reflected or penetrating radiation, depending upon the type of application, is picked up by a receiver. The receiver then sends the penetrating or reflected signal into a splitter which divides it into a first and second stream or a third and fourth stream, if necessary. After each of these streams, the split signal can then be run through a filter before it is analyzed by a sensor. The sensor reading is then fed into a microprocessor which compares, combines, and evaluates the various readings.

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"A Two-Colour Near-infrared Sensor for Sorting Recycled Plastic Waste".

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