Dual purpose bolometric sensor for heat-assisted magnetic recording device
US9799361B1 · kind B1 · utility
10Cited by
15References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2016 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | Dec 27, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus comprises a slider and an optical waveguide formed in the slider and configured to receive light from a laser source. A near-field transducer (NFT) is formed on the slider at or near an air bearing surface (ABS) of the slider and optically coupled to the waveguide. A bolometric sensor is positioned proximate the NFT and exposed to at least some of the light. The bolometric sensor is configured to detect changes in output optical power of the laser source and contact between the slider and a magnetic recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.