Bi-functional optical detector including four optical detectors used to detect combination of two wavelengths
US6627868B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 2001 |
| Grant date | Sep 30, 2003 |
| Priority date | — |
| Expiry date | Aug 3, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB82Y20/00
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
A bi-functional optical detector including a first active photoconduction detection element configured to detect light within first and second wavelength ranges, a first diffraction grating associated with the first detection element and configured to couple the light within the first wavelength range so that the first active photoconducting detection element detects the light in the first wavelength range, a second active photoconduction detection element configured to detect light within the first and second wavelength ranges, and a second diffraction grating associated with the second detection element and configured to couple the light within the second wavelength range so that the second active photoconduction detection element detects the light in the second wavelength range. Also included is a third active photoconduction detection element associated with the first detection element and configured to detect the light within the first and second wavelength ranges, a fourth active photoconduction detection element associated with the second detection element and configured to detect the light within the first and second wavelength ranges, and a common contact layer separating …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.