Phase retrieval detection device and method based on diffraction information of fresnel zone plate
US12399358B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2020 |
| Grant date | Aug 26, 2025 |
| Priority date | — |
| Expiry date | Jul 18, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A phase retrieval detection device based on diffraction information fusion of a Fresnel zone plate (FZP) (7) is provided, including a laser (1), an attenuation mirror (2), a micro-objective (3), a pinhole filter (4), a collimating objective (5), an element (6) to be detected, an FZP (7), and an image acquisition device (8) that are sequentially arranged along a light path. The phase retrieval detection device uses the FZP (7) as a light beam convergent element instead of a conventional lens, and makes an acquired diffraction spot contain more diffraction information by virtue of a multi-focus characteristic of the FZP (7). Based on a classical iterative phase retrieval method, a phase retrieval method based on the diffraction information fusion of the FZP (7) uses a diffraction light intensity distribution modulated by the FZP for retrieval to reconstruct a wider band of a wavefront to be detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.