Pulse width modulated optical sensor interface circuit having an

Details Pulse width modulated optical sensor interface circuit having an Pulse width modulated optical sensor interface circuit having an

1998-03-16

1999-11-02

Le, Que T.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

25055942, 355 69, G01J 132

Patent

active

059775335

ABSTRACT:
An apparatus for accurately positioning a leading edge of a label or detecting a notch in label stock, having, a photosensor with a light emitting element and a light receiving element, and an emitter circuit which uses an oscillating wave form coupled to the light emitting element to control the varying amount of light emitted from the light emitting element.

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