Optical disc apparatus and spherical aberration correction...

Details Optical disc apparatus and spherical aberration correction... Optical disc apparatus and spherical aberration correction...

2004-09-01

2008-07-29

Young, Wayne (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S053190, C369S118000

Reexamination Certificate

active

07406007

ABSTRACT:
An optical disc apparatus is provided, which comprises a lens tilting section for tilting an objective lens to correct coma aberration occurring in a light beam spot focused on an information surface of an optical disc, a spherical aberration correcting section for correcting spherical aberration occurring in a light beam spot focused on the information surface, and a lens tilt-spherical aberration correction control section for controlling the spherical aberration correcting section to change an amount of spherical aberration correction performed by the spherical aberration correcting section depending on a tilt of the objective lens tilted by the lens tilting section.

REFERENCES:
patent: 6141302 (2000-10-01), Koyama et al.
patent: 7054253 (2006-05-01), Nomura et al.
patent: 7142484 (2006-11-01), Ando et al.
patent: 7142497 (2006-11-01), Hirai
patent: 7164638 (2007-01-01), Wada et al.
patent: 2002-157750 (2002-05-01), None

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