Optical recording medium with recording marks having...

Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal processing for controlling recording light...

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C369S275200, C369S116000

Reexamination Certificate

active

06956804

ABSTRACT:
An optical recording medium having a higher improved read accuracy is disclosed. In the case of irradiating a laser beam to an optical recording medium including an optical reflective layer and a recording layer so as to record information therein, in the recording layer, a virtual recording cell having an arbitrary unit length and a unit width perpendicular to the unit length is continuously defined. In the case where the laser beam is irradiated to the virtual recording cell over the entire allowable irradiation time T securable to one virtual recording cell, a reference power of the laser beam is preset so that an optical reflectance of the virtual recording cell can be reduced more than 50% with respect to the initial reflectance. Further, the laser beam having the preset reference power is irradiated to the virtual recording cell in a state that an irradiation time is modulated into five stages or more, and thereby, a recording mark giving five stages or more different optical reflectance to the virtual recording cell can be formed.

REFERENCES:
patent: 5134606 (1992-07-01), Sekiguchi et al.
patent: 5136573 (1992-08-01), Kobayashi
patent: 5396480 (1995-03-01), Morishita et al.
patent: 6567367 (2003-05-01), Ohno et al.
patent: 6611484 (2003-08-01), Tsukamoto
patent: 6699557 (2004-03-01), Arioka et al.
patent: 1128365 (1901-08-01), None
patent: 1 235 210 (2002-08-01), None
patent: 02278535 (1990-11-01), None
patent: 04012885 (1992-01-01), None
patent: 04219626 (1992-08-01), None
patent: 00/25308 (1999-10-01), None
patent: WO 01/27917 (2001-04-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

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

Rate now

     

Profile ID: LFUS-PAI-O-3487392

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.