Tunable coherent light filter for optical sensing and imaging
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United States of America
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Jun 28, 2022
Grant Date -
Jan 28, 2021
app pub date -
Jul 24, 2020
filing date -
Jul 24, 2020
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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.
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