Hologram reproduction method and apparatus
US7511867B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2006 |
| Grant date | Mar 31, 2009 |
| Priority date | — |
| Expiry date | Jun 7, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2223/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A hologram reproduction method for reproducing a hologram from an optical recording medium in which the hologram is recorded by Fourier transforming a signal light, in which digital data is represented by an image of intensity distribution, and a reference light, and simultaneously irradiating the lights in a state in which a direct current component is removed from at least the Fourier transformed signal light onto the optical recording medium is provided. The method including: irradiating a read out reference light onto the optical recording medium, and generating a diffracted light from the recorded hologram; generating all or a part of a direct current component contained in a Fourier transformed image of the signal light; combining the diffracted light and the generated all or a part of the direct current component, and generating a combined beam; and reproducing the signal light by inverse-Fourier transforming the combined beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.