Multispectral imaging device based on multiple quantum wells
US8378301B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2009 |
| Grant date | Feb 19, 2013 |
| Priority date | — |
| Expiry date | Aug 11, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/1861
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a multispectral imaging device comprising a multiple-quantum-well structure operating on inter-sub-band transitions by absorbing radiation at a wavelength λ lying within a set of wavelengths to which said structure is sensitive, said structure comprising a matrix of individual detection pixels, characterized in that the matrix is organized in subsets (Eij) of four individual detection pixels, a first individual detection pixel (Pλ1) comprising a first diffraction grating (Rλ1) sensitive to a first subset of wavelengths, a second individual detection pixel (Pλ2) comprising a second diffraction grating (Rλ2) sensitive to a second subset of wavelengths, a third individual detection pixel (Pλ3) comprising a third diffraction grating (Rλ3) sensitive to a third subset of wavelengths and a fourth individual detection pixel (PΔλ) not comprising a wavelength-selective diffraction grating, the first, second and third subsets of wavelengths belonging to the set of wavelengths to which said structure is sensitive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.