Passive millimeter wave differential interference contrast polarimetry
US8710441B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2012 |
| Grant date | Apr 29, 2014 |
| Priority date | — |
| Expiry date | Oct 10, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V8/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.