Systems and methods that detect changes in incident optical...

Details Systems and methods that detect changes in incident optical... Systems and methods that detect changes in incident optical...

2003-10-23

2008-09-09

Connolly, Patrick (Department: 2877)

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

C250S550000, C250S203300, C372S020000

Reexamination Certificate

active

07423279

ABSTRACT:
Systems, methods and sensors detect changes in incident optical radiation. Current is driven through one or more active areas of a detector while the incident optical radiation illuminates the active areas. Voltage is sensed across one or more of the active areas, a change in the voltage being indicative of the changes in incident optical radiation.

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