Wavelength agile receiver with noise neutralization and angular localization capabilities (WARNALOC)
US5771092A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1997 |
| Grant date | Jun 23, 1998 |
| Priority date | — |
| Expiry date | May 8, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tunable wavelength agile opto-electronic device for detecting and determining an angle of arrival of a collimated beam of radiation comprising a linearly variable optical filter superimposed over an elongated detector having at least one radiation detector element in each quadrant of the detector. Radiation that transverses that filter projects an image of a first portion of the filter onto two adjacent detector elements in separate quadrants at a first end of the elongated detector and an equal size image of a second portion of the filter onto two adjacent detector elements in separate quadrants at a second end of the elongated detector. A signal generated by radiation that transverses the filter onto a detector element in a quadrant at the second end is subtracted from a signal generated by radiation that transverses the filter onto an aligned detector element at the first end of the elongated detector to provide two difference signals, one for each side of the elongated detector. That subtraction reduces noise generated by background radiation to enable easier detection of a collimated beam and processing electronics use the two difference signals to determine the angle of arr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.