Optical disk apparatus
US7499381B2 · kind B2 · utility
0Cited by
6References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 24, 2007 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Sep 24, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/13927
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disk apparatus having an aberration correcting unit for correcting aberrations generated on the recording surface of an optical disk based on received correcting signals, a servo signal generating unit for generating servo signals based on the reflection lights from the optical disk and predefined parameters, and a birefringence detecting unit that detects the degrees of birefringent portions on the recording surface based on received the servo signals and generates the correcting signals for correcting aberrations according to the detected degrees of the birefringent portions and outputs the correcting signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.