Latent holographic media and method
US7678507B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2006 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Sep 16, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2260/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A holographic recording medium having a polymer matrix comprising a developer, wherein the holographic recording medium is capable of recording a latent hologram and the developer is capable of developing the latent hologram into a readable hologram by activation of the developer is disclosed. The holographic recording medium is capable of storing large numbers of holograms in the same volume with better signal resolution than previous holographic media by first recording a multitude of latent (or very weak) holograms in the same volume of space, then applying preferably a non-chemical fixing step to develop the latent holograms into readable holograms. The holographic recording medium and method of this invention cause the holograms to increase in diffraction efficiency, thus preventing complications caused during recording of holograms whereby previously recorded holograms interfere with latter recorded holograms in the same volume of space within the media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.