Holographic storage with combined orthogonal phase codes and random phase codes
US5627664A · kind A · utility
25Cited by
7References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1994 |
| Grant date | May 6, 1997 |
| Priority date | — |
| Expiry date | Jun 29, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2001/2675
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method and apparatus for holographic storage with combined orthogonal phase codes and random phase codes are provided in which a reference beam (18) is encoded with a combination orthogonal phase code and random phase code by a phase encoder (28). A data pattern is imposed on an object beam (20) by pattern encoder (38). Both the reference beam (18) and the object beam (20) are directed to a particular stack site on a storage medium (32).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.