Currency validator using a photocoupler for image recognition us

Details Currency validator using a photocoupler for image recognition us Currency validator using a photocoupler for image recognition us

1993-06-24

1995-01-10

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

356 71, G06K 500

Patent

active

053810198

ABSTRACT:
A photocoupler for image recognition is disclosed which comprises a case, a pair of a light emitting diode and a light sensitive transistor, and a cylindrical lens which forms the light emitted from the diode into a linear light image on a surface of an object having printed pattern. After reflected on a surface of the object, the linear light image passes through the cylindrical lens and is received by the light sensitive transistor.

REFERENCES:
patent: 3689774 (1972-09-01), Wildhaber
patent: 4616131 (1986-10-01), Burkhardt
patent: 5034616 (1991-07-01), Bercovitz
patent: 5120126 (1992-06-01), Wertz et al.
patent: 5129725 (1992-07-01), Ishizuka et al.

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