Holographic wavefront sensing
US10634562B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2017 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Feb 7, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2223/19
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
According to a first aspect, there is provided a method of holographic wavefront sensing, the method including: receiving a light beam, which has a wavefront to be analyzed, on a transparent, flat substrate, which is provided with a lattice of opaque dots, wherein the substrate is arranged above an image sensor; detecting by the image sensor an interference pattern formed by diffracted light, being scattered by the opaque dots, and undiffracted light of the light beam received by the image sensor; processing the detected interference pattern to digitally reconstruct a representation of a displaced lattice of opaque dots, which would form the interference pattern on the image sensor upon receiving the light with a known wavefront; and comparing the representation of the displaced lattice to a known representation of the lattice of opaque dots on the substrate to determine a representation of the wavefront form of the received light beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.