Coherent skew mirrors
US11119261B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2018 |
| Grant date | Sep 14, 2021 |
| Priority date | — |
| Expiry date | Jun 11, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2223/50
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Systems and methods for performing coherent diffraction in an optical device are disclosed. An optical device may include a grating medium with a first hologram having a first grating frequency. A second hologram at least partially overlapping the first hologram may be provided in the grating medium. The second hologram may have a second grating frequency that is different from the first grating frequency. The first and second holograms may be pair-wise coherent with each other. A manufacturing system may be provided that writes the pair-wise coherent holograms in a grating medium using a signal beam and a reference beam. Periscopes may redirect portions of the signal and reference beams towards a partial reflector, which combines the beams and provides the combined beam to a detector. A controller may adjust an effective path length difference between the signal and reference beams based on a measured interference pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.