Information recording apparatus
US5128693A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1991 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Sep 11, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2225/60
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An information recording apparatus includes an acoustooptic deflector, receives a laser beam from a recording light source and an amplitude modulation signal, and diffracts the laser beam in two directions, thereby generating a carrier wave diffracted beam and a lower sideband diffracted beam. The carrier wave diffracted beam is provided with information by a spatial light modulator and modulated, and is incident, as a signal beam, on a moving recording medium. The lower sideband diffracted beam is incident, as a reference beam, on the same incident region as that of the signal beam. The two beams interfere with each other, and multiplexed recording of a hologram is performed on the recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.