Optical non-uniformity correction (NUC) for active mode imaging sensors using micro-electro-mechanical system (MEMS) micro-mirror arrays (MMAs)
US11650412B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2020 |
| Grant date | May 16, 2023 |
| Priority date | — |
| Expiry date | Sep 17, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0039
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An active mode image sensor for optical non-uniformity correction (NUC) of an active mode sensor uses a Micro-Electro-Mechanical System (MEMS) Micro-Mirror Array (MMA) having tilt, tip and piston mirror actuation to form and scan a laser spot that simultaneously performs the NUC and illuminates the scene so that the laser illumination is inversely proportional to the response of the imager at the scan position. The MEMS MMA also supports forming and scanning multiple laser spots to simultaneously interrogate the scene at the same or different wavelengths. The piston function can also be used to provide wavefront correction. The MEMS MMA may be configured to generate a plurality of fixed laser spots to perform an instantaneous NUC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.