Holographic recording and related reading process
US4592618A · kind A · utility
11Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1982 |
| Grant date | Jun 3, 1986 |
| Priority date | — |
| Expiry date | Jul 2, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A holographic process is provided for recording-reading by means of index strata in the volume of a photoexcitable storage medium. This process consists in causing two beams to interfere in this medium during two successive writing steps by using writing radiations of different wavelengths. The reading of this medium is then effected by means of a third coherent radiation having for wave vector in the medium a linear combination of the wave vectors of said writing radiations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.