Detecting transducer position precisely with a reusable sensor assembly
US7023643B2 · kind B2 · utility
0Cited by
12References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 2002 |
| Grant date | Apr 4, 2006 |
| Priority date | — |
| Expiry date | Apr 25, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59633
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for transducer position detection uses inert contact surfaces to engage an actuator temporarily. The inert contact surfaces are part of an apparatus that also includes an optical sensor such as a retroreflector or diffraction grating. The assembly is thus configured to permit multiple uses while exerting a near-zero net torque about the length of the arm that supports the transducer. This is useful where there is a temporary need for especially precise position control, such as when servowriting a data storage media surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.