Optical disk apparatus with approximate focus control of...

Details Optical disk apparatus with approximate focus control of... Optical disk apparatus with approximate focus control of...

2008-07-14

2010-12-28

Edun, Muhammad N. (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044280, C369S044290, C369S044340, C369S053230

Reexamination Certificate

active

07859954

ABSTRACT:
An optical disk apparatus is constructed for writing or reading information by irradiating a laser beam onto an optical disk while rotating the optical disk under a focus control of the laser beam relative to the rotated optical disk. In the optical disk apparatus, an irradiating section is operated to irradiate a laser beam onto the optical disk. A determining section determines a process pattern of the focus control by operating the irradiating section to irradiate the laser beam onto a predetermined area of the optical disk and by monitoring the laser beam reflected back from the predetermined area. A focusing section performs the focus control to regulate a spot diameter of the laser beam based on the determined process pattern during either of the writing or reading of information.

REFERENCES:
patent: 5502698 (1996-03-01), Mochizuki
patent: 5796687 (1998-08-01), Baba
patent: 5798161 (1998-08-01), Kita et al.
patent: 5953296 (1999-09-01), Baba
patent: 6269064 (2001-07-01), DeCusatis et al.
patent: 6434088 (2002-08-01), Ishizaki et al.
patent: 6529468 (2003-03-01), Noda et al.
patent: 6542454 (2003-04-01), Maeda
patent: 6704257 (2004-03-01), Yamamiya
patent: 6836452 (2004-12-01), Matsuda
patent: 6864907 (2005-03-01), Bronson
patent: 6987724 (2006-01-01), Kim et al.
patent: 7050365 (2006-05-01), Morishima
patent: 7173887 (2007-02-01), Kimikawa
patent: 2002/0191517 (2002-12-01), Honda et al.

Affiliated with

Also associated with

Rating

Optical disk apparatus with approximate focus control of... 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 apparatus with approximate focus control of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disk apparatus with approximate focus control of... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4208129