Method and device for recording optical data

Details Method and device for recording optical data Method and device for recording optical data

2006-05-08

2009-02-24

Hindi, Nabil Z (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal processing for controlling recording light...

C369S275300

Reexamination Certificate

active

07496021

ABSTRACT:
There is provided a method and a device for recording optical data able to improve recording power setting during recording by means of PWM with a small number of pulses. During the test recording, using a period of a recording channel clock Tw as the minimum unit, marks having different mark lengths of n1·Tw and n2·Tw (n1<n2) are recorded with the same number of m (m<n) light emitting pulses, while successively changing the maximum power Pw of the recording signals. The recorded marks are reproduced and the mark lengths T1and T2are measured from the reproduced signals. The recording power can be set by evaluating the deviations D1=T1−n1·Tw and D2=T2−n2·Tw.

REFERENCES:
patent: 5629913 (1997-05-01), Kaku et al.
patent: 5642343 (1997-06-01), Toda et al.
patent: 5732062 (1998-03-01), Yokoi et al.
patent: 5736657 (1998-04-01), Ide et al.
patent: 5974025 (1999-10-01), Yamada et al.
patent: 6134209 (2000-10-01), Den Boef
patent: 6280684 (2001-08-01), Yamada et al.
patent: 6280810 (2001-08-01), Nakamura et al.
patent: 6319368 (2001-11-01), Ide et al.
patent: 6373802 (2002-04-01), Nakamura et al.
patent: 6388978 (2002-05-01), Ide et al.
patent: 6445669 (2002-09-01), Hattori et al.
patent: 6503592 (2003-01-01), Yamada et al.
patent: 7170835 (2007-01-01), Roh et al.
patent: 2001/0017833 (2001-08-01), Yamanda et al.
patent: 2002/0021594 (2002-02-01), Nakamura et al.
patent: 2002/0034663 (2002-03-01), Ide et al.
patent: 2002/0075789 (2002-06-01), Hattori et al.
patent: 2002/0093897 (2002-07-01), Ogawa et al.
patent: 2002/0110063 (2002-08-01), Katoh et al.
patent: 2002/0145963 (2002-10-01), Narumi et al.
patent: 2002/0155248 (2002-10-01), Ito et al.
patent: 2003/0008236 (2003-01-01), Yamada et al.
patent: 2003/0026195 (2003-02-01), Kato et al.
patent: 2003/0043712 (2003-03-01), Nakamura et al.
patent: 2003/0044719 (2003-03-01), Katoh et al.
patent: 0477892 (1992-04-01), None
patent: 0932144 (1999-07-01), None
patent: 2001-331936 (2001-11-01), None
patent: 9-134525 (1997-05-01), None
patent: 9-219021 (1997-08-01), None
U.S. Appl. No. 09/569,501, filed May 11, 2000.
U.S. Appl. No. 09/793,131, filed Feb. 27, 2001.

Affiliated with

Also associated with

Rating

Method and device for recording optical data does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and device for recording optical data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for recording optical data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4102949