Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2005-12-08
2009-02-03
Pyo, Kevin (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S550000, C250S205000, C356S499000, C359S572000
Reexamination Certificate
active
07485847
ABSTRACT:
Optical sensors, and methods for operating optical sensors, are disclosed. One such sensor may include: a reflector positioned a distance from a reflective diffraction grating and a light source for providing light. A first portion of the light can be reflected from the reflective diffraction grating and a second portion of the light passes through the grating to the reflector and is reflected back through the diffraction grating. The sensor may further include a detector for sensing an intensity of light in an interference pattern formed by the first portion of the light reflected from the diffraction grating and the second portion of the light reflected from the reflector. The sensor includes a controller configured to modulate an emission of the light.
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Degertekin Fahrettin Levent
Hall Neal Allen
Lee Wook
Bockhop Bryan W.
Bockhop & Associates LLC
Georgia Tech Research Corporation
Pyo Kevin
Williams Don
LandOfFree
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