Optical disk device and information recording/reproducing...

Details Optical disk device and information recording/reproducing... Optical disk device and information recording/reproducing...

2007-10-16

2007-10-16

Hindi, Nabil (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S053280

Reexamination Certificate

active

11386126

ABSTRACT:
An optical disk device is provided with an optical pickup that includes a convergent optical system having an objective lens for converging a light beam emitted from the laser light source to form a microspot on an optical disk and an aberration correcting optical system for controlling a spherical aberration of the convergent optical system, and performs information recording or reproduction with respect to a multi-layer optical disk having at least a first recording layer and a second recording layer. In the optical disk device, an operation of changing a correction quantity of the spherical aberration from a value adequate for the first recording layer to a predetermined value is started before an operation of moving a focus position of the microspot from the first layer to the second layer is completed. This allows a focus control to be performed stably with respect to the second recording layer in a state in which the spherical aberration correction already has been carried out, thereby preventing the focus control from failing due to an unsuccessful interlayer jump.

REFERENCES:
patent: 6052237 (2000-04-01), Opheij et al.
patent: 6636474 (2003-10-01), Tanaka et al.
patent: 6738332 (2004-05-01), Sato et al.
patent: 1181833 (1998-05-01), None
patent: 1 043 615 (2000-10-01), None
patent: 9-115146 (1997-05-01), None
patent: 10-143873 (1998-05-01), None
patent: 11-191222 (1999-07-01), None
patent: 11-316954 (1999-11-01), None
patent: 2000-131603 (2000-05-01), None

Affiliated with

Also associated with

Rating

Optical disk device and information recording/reproducing... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical disk device and information recording/reproducing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disk device and information recording/reproducing... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3894293