OPTICAL INFORMATION RECORDING DEVICE

PROBLEM TO BE SOLVED: To automatically adjust an optical system to a correct optimal point irrespective of positional shifting of a reproduced signal detector or a residual aberration of the optical system in a rewritable optical disk device or an optical information recording/reproducing device. SO...

Full description

Saved in:
Bibliographic Details
Main Authors ONISHI KUNIKAZU, SHIMANO TAKESHI, ISSHIKI FUMIO, KUROKAWA TAKAHIRO, MAEDA NOBUYUKI
Format Patent
LanguageEnglish
Published 21.08.2008
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
Online AccessGet full text

Cover

More Information
Summary:PROBLEM TO BE SOLVED: To automatically adjust an optical system to a correct optimal point irrespective of positional shifting of a reproduced signal detector or a residual aberration of the optical system in a rewritable optical disk device or an optical information recording/reproducing device. SOLUTION: A spherical aberration and a focal depth are roughly adjusted simultaneously by using tracking error signal amplitude (PP amplitude) and finely adjusted by using reproduced signal amplitude (RF amplitude). The spherical aberration is adjusted to its correct optimal point. Thus, reliability of a signal to be reproduced is improved. COPYRIGHT: (C)2008,JPO&INPIT
Bibliography:Application Number: JP20080129030