Lensless imaging with reduced aperture
US7499174B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jan 12, 2006 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Apr 8, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B2290/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An image of an object can be synthesized either from the Fourier components of the electric field or from the Fourier components of the intensity distribution. Imaging with a lens is equivalent to assembling the Fourier components of the electric field in the image plane. This invention provides a method and a means for lensless imaging by assembling the Fourier components of the intensity distribution and combining them to form the image with the use of amplitude splitting interferometer. The angular spectrum of the electromagnetic radiation consists of wavefronts propagating at different angles. The amplitude of each wavefront is split and interfered with itself to create sinusoidal fringe patterns having different spatial frequencies. The sinusoidal fringe patterns are combined to form an image of the object. This method applies to coherent and incoherent light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.