Optical sensor with planar wall

Details Optical sensor with planar wall Optical sensor with planar wall

1999-03-05

2000-12-19

Epps, Georgia

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250557, 250226, G06K 7015, G06K 500, G01J 350

Patent

active

061630349

ABSTRACT:
An improved optical sensor for a banknote validator uses an aspherical lens having a planar wall as a combination radiation plug for a port in the pathway and a focusing arrangement. Emitters and receivers are closely positioned on a common support and generally located at the focal point of the lens. The radiation reflected by a banknote is focused and received by the receiver. The lens also serves to collimate the produced radiation of the emitters for scanning of the banknote.

REFERENCES:
patent: 4650319 (1987-03-01), Wittich et al.
patent: 4650320 (1987-03-01), Potter et al.
patent: 5304813 (1994-04-01), De Man
patent: 5686720 (1997-11-01), Tullis

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