Optical information recording medium, optical information...

Details Optical information recording medium, optical information... Optical information recording medium, optical information...

2008-01-15

2008-01-15

Huber, Paul W. (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S275300

Reexamination Certificate

active

07319656

ABSTRACT:
The present invention is applicable to a recording apparatus of a CD or DVD, a recording method thereof and a recording medium, and an object of the present invention is to clearly record a second information such as characters and figures between two recording levels in an optical disk. The second information is recorded in a predetermined area in a radius direction and a angular direction on the optical information recording medium, and further, the second information is recorded according to a change of a pit width based on a change of power of the laser beam, a change of a pit length based on an on/off control of the laser beam, or a change of depression or bulge of the pit based on a change in the vicinity of the on/off control of the laser beam. Whereby it is possible to record the second information such as a watermark pattern or a visible image, which is capable of being confirmed by seeing a disk.

REFERENCES:
patent: 6266299 (2001-07-01), Oshima et al.
patent: 7-272325 (1995-10-01), None
patent: 8-77618 (1996-03-01), None
patent: 9-306144 (1997-11-01), None
patent: 9-312021 (1997-12-01), None
patent: 10-31825 (1998-02-01), None

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