Hologram recording method, optical recording medium, and hologram-recording device
US7477433B2 · kind B2 · utility
1Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2005 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Sep 30, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A hologram-recording method including recording a reflection-type volume hologram onto an optical recording medium by irradiating the optical recording medium with a modulated beam obtained by spatially modulating a laser beam and a diffused beam obtained by diffusing the modulated beam, coaxially but from different sides of the optical recording medium, respectively. The invention provides a hologram-recording method, an optical recording medium, and a hologram-recording device that enables on-demand recording of a reflection-type volume hologram which reliably prohibits forgery or alteration with a simple device configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.