Method and device for holographic recording
US7362687B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 16, 2004 |
| Grant date | Apr 22, 2008 |
| Priority date | — |
| Expiry date | Nov 10, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2001/2675
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A holographic recording method for recording information as phase information of light by projecting a signal beam and a reference beam onto a recording medium, wherein an X direction is defined as the direction of a line of intersection between a plane including the optical axes of the signal beam and reference beam (incidence plane) and the recording plane of the recording medium, and the Y direction is defined as the direction of a line lying normal to the incidence plane and intersecting said line of intersection, comprises steps of using the reference beam modulated with a first phase code to record a first hologram at a predetermined position and using the reference beam modulated with a second phase code whose pattern is different from that of the first phase code to record at a position shifted in the Y direction a second hologram that partially overlaps the first hologram.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.