Optical element, device, method, and applications
US8558182B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2010 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Apr 30, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2223/23
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A novel phase-coded aperture, associated imaging system, and design method is disclosed. The optical imaging system includes a coded-aperture followed optically by a detector array and includes an image processor. A diffraction pattern in the form of a band-limited uniformly redundant array is formed on the detector array when focusable radiation from a point source in object space is modulation by the transmission function of the coded-aperture. Since diffraction effects cannot be ignored in the optical regime, an iterative phase retrieval method is used to calculate the phase-coded aperture transmission function. Correlation type processing can be applied for the image recovery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.