Synthetic apertures for long-range, sub-diffraction limited visible imaging using fourier ptychography
US10694123B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 14, 2018 |
| Grant date | Jun 23, 2020 |
| Priority date | — |
| Expiry date | Oct 4, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/951
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for imaging objects includes illuminating an object with a light source of an imaging device, and receiving an illumination field reflected by the object. An aperture field that intercepts a pupil of the imaging device is an optical propagation of the illumination field at an aperture plane. The method includes receiving a portion of the aperture field onto a camera sensor, and receiving a sensor field of optical intensity. The method also includes iteratively centering the camera focus along the Fourier plane at different locations to produce a series of sensor fields and stitching together the sensor fields in the Fourier domain to generate an image. The method also includes determining a plurality of phase information for each sensor field in the series of sensor fields, applying the plurality of phase information to the image, receiving a plurality of illumination fields reflected by the object, and denoising the intensity of plurality of illumination fields using Fourier ptychography.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.