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Passive millimeter wave differential interference contrast polarimetry

United States Patent

April 29, 2014
View the Complete Patent at the US Patent & Trademark Office
Pacific Northwest National Laboratory - Visit the Technology Commercialization Program Website
Differential polarization imaging systems include an axicon configured to provide a displacement of ray bundles associated with different image patches. The displaced ray bundles are directed to antenna horns and orthomode transducers so as to provide outputs correspond to orthogonal linear states of polarization (SOPs). The outputs are directed to a differential radiometer so that Stokes parameter differences between image patches can be obtained. The ray bundle displacements can be selected to correspond to a mechanical spacing of antenna horns. In some examples, ray bundle displacement corresponds to a displacement less than the diffraction limit.
Bernacki; Bruce E. (Kennewick, WA), Kelly; James F. (Pasco, WA), Sheen; David M. (Richland, WA), Tedeschi; Jonathan R. (Richland, WA), Hall; Thomas E. (Kennewick, WA), Hatchell; Brian K. (West Richland, WA), Valdez; Patrick (Pasco, WA), McMakin; Douglas L. (Richland, WA)
Battelle Memorial Institute (Richland, WA)
13/ 410,923
March 2, 2012
ACKNOWLEDGMENT OF GOVERNMENT SUPPORT This invention was made with government support under contract number DE-AC05-76RL01839 awarded by the U.S. Department of Energy, Office of Nonproliferation Research (NA-22). The government has certain rights in the invention.