Polarization decorrelation time imaging
US10794767B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 22, 2019 |
| Grant date | Oct 6, 2020 |
| Priority date | — |
| Expiry date | Jul 22, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/1308
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An object detection system uses a change in a linear polarization statistic between a first image at a first time and a second image at a second time to determine the presence or the likelihood of an object beneath a surface. The presence of the object may be determined by regions of anomalously high changes in the polarization statistic. The system may use a polarization change detection detector which may simultaneously capture images in multiple polarization channels. Further, the polarization change detection detector may be coupled with a laser interferometry system. Further, the polarization change detection detector may be used to capture a time series of images to determine the polarization decorrelation time for each pixel in the field of view to provide additional detail regarding an object detected beneath the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.