Method of and apparatus for interferometric background suppression
US4128337A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 13, 1977 |
| Grant date | Dec 5, 1978 |
| Priority date | — |
| Expiry date | Jun 13, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S3/781
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of detecting a small elemental spectral source in a larger, spectral background, including producing a first interferogram of each element of an object area including the source and background; producing a second complementary interferogram of each element of that object area; projecting onto a detector images of the first and second interferograms and defocussing one of the first and second interferograms for providing a fluctuating elemental interferogram output from each element of the detector which receives an interferogram derived from the element of the object area that contains a source which spectrally distinguishes from the background, while reducing the output corresponding to each element containing no source to a constant and non-fluctuating level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.