Near field optical head and reproduction method
US6448543B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 2, 2002 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Jan 2, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A near-field optical head which reproduces, with high S/N, information recorded with extreme density and is compact in structure. On an electrode (2) is formed a recording medium (3) that emits a light by applying an electric field. Brought into proximity to a recording medium (3) is a near-field optical head (101) having a slider (31) formed with an inverted cone formed hole such that an apex thereof is rendered as a microscopic aperture (6). A microscopic electrode (5) is formed on a side surface (32) of the inverted cone formed hole. An electric field (9) is applied only to a microscopic region to cause light emission. It is possible at the aperture (6) to detect a light emitted only by the microscopic region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.