Hologram recording apparatus and method therefor
US6535472B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 2, 2000 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Feb 16, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/2432
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A hologram recording apparatus is capable of directing interferable signal light and reference light into a hologram recording medium to record an information signal carried by the signal light. The hologram recording medium is sensitive to a first light at a first wavelength in an ultraviolet or short-wavelength visible light band to develop light induced absorption. The apparatus includes a light source for irradiating the hologram recording medium with the first light, and a laser light source for irradiating the hologram recording medium with signal light and reference light at a second wavelength longer than the first wavelength after the first light is irradiated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.