Optical communications – Receiver – Heterodyne
Reexamination Certificate
2006-06-20
2008-08-12
Connolly, Patrick (Department: 2877)
Optical communications
Receiver
Heterodyne
C342S362000, C398S001000
Reexamination Certificate
active
07412175
ABSTRACT:
A signal conditioning module provides a polarimeter capability in a photometric system. The module may include multiple variable delay polarization modulators. Each modulator may include an input port, and a first arm formed to include a first reflector and first rooftop mirror arranged in opposed relationship. The first reflector may direct an input radiation signal to the first rooftop mirror. Each modulator also may include an output port and a second arm formed to include a second reflector and second rooftop mirror arranged in opposed relationship. The second reflector can guide a signal from the second rooftop mirror towards the output port to provide an output radiation signal. A beamsplitting grid may be placed between the first reflector and the first rooftop mirror, and also between the second reflector and the second rooftop mirror. A translation apparatus can provide adjustment relative to optical path length vis-a-vis the first arm, the second arm and the grid.
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Chuss David T.
Moseley Samuel H.
Novak Giles A.
Wollack Edward J.
Connolly Patrick
Goo Heather
Richey Scott M
The United States of America as represented by the Administrator
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