Tilt detecting device and method
US8098554B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 2006 |
| Grant date | Jan 17, 2012 |
| Priority date | — |
| Expiry date | May 9, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10046
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information recording and/or reproducing apparatus includes an optical head, an analog signal processor, an analog/digital converter, a controller and a digital/analog converter. The optical head is used for emitting a light beam on a medium and receiving a reflected light beam from the medium. The analog signal processor is used for processing the reflected light beam to obtain a first analog signal. The analog/digital converter is used for converting the first analog signal into a digital signal. The controller is used for applying a low-pass filtering operation on the digital signal to obtain a digital controlling signal. The digital/analog converter is used for converting the digital controlling signal into a second analog signal. The second analog signal is transmitted to the optical head for correcting a tilt between the light beam and the medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.