Fast duplication of diffractive storage device for mass production
US7248556B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2002 |
| Grant date | Jul 24, 2007 |
| Priority date | — |
| Expiry date | Sep 25, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0065
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A master memory device that stores a plurality of pages of information. An unexposed memory device (190) is adjacent to the master memory device (180). The unexposed memory device and the master memory device are separated by a gap. An aperture unit (130) is disposed in the gap. The aperture has a plurality of aperture openings. Each opening corresponds, in size, to an individual page constitutes of a column with specific multiplexing angles of memory in the master memory device. The aperture unit is located across a face of the master memory device such that the openings correspond to selected ones of the pages of information. A light source (120) generates a beam that transfers memory data from the master memory device to the unexposed memory device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.