Tunable coherent light filter for optical sensing and imaging
US11371887B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 24, 2020 |
| Grant date | Jun 28, 2022 |
| Priority date | — |
| Expiry date | Jul 24, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2005/106
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods are provided for filtering coherent infrared light from a thermal background for protection of infrared (IR) imaging arrays and detection systems. A Michelson interferometer is used for coherent light filtering. In an implementation, a system includes a fixed mirror, a beam splitter, and a moving mirror which can be controlled translationally, as well as tip/tilt. The Michelson interferometer may be used as an imaging system. For imaging applications, a system may comprise a tunable array of micro-electromechanical systems (MEMS) mirrors. A mid-wave IR interferometer with electronic feedback and MEMS mirror array is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.