Microgrid imaging polarimeters with frequency domain reconstruction
US8823848B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2010 |
| Grant date | Sep 2, 2014 |
| Priority date | — |
| Expiry date | Mar 7, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J4/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A polarization camera includes a microlement polarizer that is situated in proximity to a focal plane array. The microlement polarizer is selectively scanned with respect to an optical image direct to the focal plane array, and an image processor stores a set of images associated with the scanning. Based on the stored images, a polarization image can be produced and displayed. A periodic microelement polarizer modulates the individual images of the set, and these images can be processed by filtering in the spatial frequency domain to isolate contributions associated with one or a combination of Stokes parameters. After filtering, Stokes parameter based images can be obtained by demodulating and inverse Fourier transforming the filtered frequency domain data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.