Holographic recording and reproducing apparatus
US6961161B2 · kind B2 · utility
6Cited by
1References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 20, 2004 |
| Grant date | Nov 1, 2005 |
| Priority date | — |
| Expiry date | Aug 20, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2210/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image detected by a CCD image sensor 108 when only a non-modulated signal light is applied to a holographic memory 120 in which data is not recorded is ensured as a noise pattern. When data is reproduced, the previously obtained noise pattern is subtracted from a reproduced image detected by the CCD image sensor 108.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.