Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-02-23
2008-10-28
Epps, Georgia Y. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S221000, C340S556000
Reexamination Certificate
active
07442917
ABSTRACT:
Systems and methods are disclosed that facilitate increasing a coverage area for an emitter-receiver pair in a light curtain by generating multiple light beams from a single emitter and aggregating the light beams at a corresponding receiver. A plurality of light beams can be generated by reflection off of a MEMS mirror associated with the emitter, which can then be reflected from receiver-side mirrors along generally parallel paths, to corresponding emitter-side mirrors, which in turn reflect the light beams back to a MEMS mirror associated with the receiver. The receiver-side MEMS mirror can aggregate the reflected light beams for detection thereof by the receiver. According to a related aspect, transmissive LCD arrays can be employed at both the emitter and receiver to generate and recombine a plurality of light beams, respectively.
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Delcher Ray
Dogul James E.
Galera Richard
Jones Derek W.
Nair Suresh
Amin Turocy & Calvin LLP
Epps Georgia Y.
Legasse Jr. Francis M
Rockwell Automation Technologies Inc.
Walbrun William R.
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