Anti-reflection waveguide for heat-assisted magnetic recording
US9558769B1 · kind B1 · utility
7Cited by
11References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2015 |
| Grant date | Jan 31, 2017 |
| Priority date | — |
| Expiry date | Sep 30, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system, according to one embodiment, includes a magnetic head having: a near field transducer, an optical waveguide for illumination of the near field transducer, and an anti-reflection block positioned along the optical waveguide farther from a media facing side of the magnetic head than the near field transducer. The anti-reflection block is positioned a distance from the near field transducer to destructively interfere with light reflected away from the near field transducer. Other systems, methods, and computer program products are described in additional embodiments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.