Radiant energy – Photocells; circuits and apparatus – Housings
Reexamination Certificate
2008-07-08
2008-07-08
Epps, Georgia Y. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Housings
C250S2140SW, C250S221000, C340S555000, C345S175000
Reexamination Certificate
active
07397022
ABSTRACT:
A sensor arrangement, in particular as part of a reflection light barrier, includes a carrier as well as a photodiode, a first light emitting diode for emitting a measuring light beam, and a second light emitting diode for emitting a reference light beam, in particular a reference light beam pulsed offset in time with respect to the measuring light beam, arranged on the carrier, and further includes a light permeable housing enclosing the photodiode and the two light emitting diodes. The second light emitting diode is arranged on the carrier and in the housing such that the reference light emitted by it is essentially not incident on the side of the photodiode but rather is reflected internally in the housing to be incident onto an upper surface of the photodiode.
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Figueria Robert
Schmidt Manuel
Epps Georgia Y.
Fasse W. F.
Fasse W. G.
Sohn Seung C.
Vishay Semiconductor GmbH
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