Data storage system and methods using diffractive near-field optics
US6396789B1 · kind B1 · utility
49Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1998 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Feb 27, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B9/14
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical assembly suitable for use with an optical medium for the storage and retrieval of data, the optical assembly comprising: a source of illumination for providing a beam of optical radiation, an objective lens disposed in the optical path of the beam for redirecting the beam to the optical medium, and a diffractive optical element disposed between the redirected beam of radiation and the optical medium such that at least a portion of the redirected beam of radiation passes through a surface of the diffractive optical element and is reflected to the objective lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.