Optical disc device

Details Optical disc device Optical disc device

2007-10-16

2007-10-16

Korzuch, William (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044320

Reexamination Certificate

active

10481206

ABSTRACT:
An optical disc device of the present invention includes spherical aberration changing means for changing spherical aberration occurring on a converging position of a light beam converged by a lens, an actuator for moving the spherical aberration changing means in a relatively precise manner, and an actuator for moving the spherical aberration changing means in a relatively rough manner. The optical disc device drives a second actuator and a third actuator based on a signal of spherical aberration detecting means and performs control so that spherical aberration is almost 0. The third actuator moves the spherical aberration changing means based on a direct current component included in a signal of the spherical aberration detecting means, and the second actuator moves the spherical aberration changing means based on an alternating current component included in the signal of the spherical aberration detecting means.

REFERENCES:
patent: 6229600 (2001-05-01), Martynov
patent: 6430137 (2002-08-01), Saimi et al.
patent: 6584065 (2003-06-01), Maeda et al.
patent: 6807133 (2004-10-01), Ariyoshi et al.
patent: 2001/0019528 (2001-09-01), Shiono et al.
patent: 2002/0018406 (2002-02-01), Yamada
patent: 2002/0036958 (2002-03-01), Wada et al.
patent: 2002/0057359 (2002-05-01), Tadano et al.
patent: 2002/0150016 (2002-10-01), Yasuda et al.
patent: 2002-157750 (2002-05-01), None
Shimano et al., “Spherical Aberration Detection for HD-DVD Optical Pickups”,International Symposium on Memory 2000 at Chitose, Hokkaido, Japan, pp. 242-243, (2002).
Osato et al., “Progress in Optical Disk Recording With Over 20 GB of Capacity”,Optical Data Storage 2000 at British Columbia, Canada, pp. 15-17, (2000).

Affiliated with

Also associated with

Rating

Optical disc device 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 disc device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disc device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3847705