Method for storing holographic data
US8808944B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2007 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | Dec 9, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2504
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for storing holographic data, said method comprising: step (A) providing an optically transparent substrate comprising a polymer composition and a light absorbing chromophore, said polymer composition comprising a continuous phase and a dispersed phase, said dispersed phase being less than about 200 nm in size; and step (B) irradiating a volume element of the optically transparent substrate with a holographic interference pattern, wherein the pattern has a first wavelength and an intensity both sufficient to cause a phase change in at least a portion of the dispersed phase within the volume element of the substrate to produce within the irradiated volume element refractive index variations corresponding to the holographic interference pattern, thereby producing an optically readable datum corresponding to the volume element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.