Method for distinguishing pen from other materials

Details Method for distinguishing pen from other materials Method for distinguishing pen from other materials

1997-09-22

1999-06-29

Font, Frank G.

Optics: measuring and testing

For optical fiber or waveguide inspection

G01N 2100

Patent

active

059175850

ABSTRACT:
In the present invention, a system and method are disclosed for distinguishing PEN from other types of materials. The method and system discloses an electromagnetic radiation source which transmits electromagnetic radiation to an object. The electromagnetic radiation either passing through an object or rejecting from an object is then measured to determine the amount of penetrating or reflecting electromagnetic radiation. This amount of penetrating or reflecting electromagnetic radiation is then measured to classify the item by type.

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"A Two-Colour Near-Infrared Sensor for Sorting Recycled Plastic Waste" Oct. 24, 1994.

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