Near-field optical head and information recording apparatus
US8023366B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2006 |
| Grant date | Sep 20, 2011 |
| Priority date | — |
| Expiry date | May 27, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention is a near-field optical head that generates near-field light to heat a predetermined area of a medium and applies a magnetic field to the predetermined area to record information, the head including an optical waveguide 103 having a path for propagating a pencil of light, and a tip 117 having an optical minute opening 118 at the position facing against the predetermined area and collecting the pencil of light emitted from the optical waveguide 103 and simultaneously propagating the collected pencil of light to the optical minute opening 118 to generate the near-field light. The optical minute opening 118 is formed by a magnetic pole that applies a magnetic field to the predetermined area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.