Polarimetric optical device with an insulating layer between detectors
US6797938B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2002 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Dec 29, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F77/413
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
This optical polarimetric detector comprises:a first active detector element having a photoconductor (1) with which a first diffraction grating (3) is associated allowing incident light from a first specific polarization direction to be coupled in the first detector element and allowing the latter to detect the light having this first polarization direction;a second active detector element having a photoconductor (1′) with which a second diffraction grating (3′) is associated allowing incident light from a second polarization direction to be coupled in the second detector element and allowing the latter to detect the light having this second polarization direction.Furthermore, a detector (2) is provided making it possible to eliminate the background noise detected by previous detectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.