Information recording apparatus and information recording...

Details Information recording apparatus and information recording... Information recording apparatus and information recording...

2007-06-12

2007-06-12

Edun, Muhammad (Department: 2627)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

C369S047500, C369S059100, C369S053100

Reexamination Certificate

active

10545791

ABSTRACT:
A laser beam from a pickup is focused on an information recording medium, such as a DVD-R/RW, to record information. When the power of the laser beam is calibrated, the laser beam emitted from the pickup is received by a light receiving unit such as an FMD. The level of the received laser beam is detected, the power ratio of the laser beam is determined based on the result, and the power of the laser beam is calibrated so that the power ratio matches a predetermined reference power ratio. This method enables information to be recorded with optimum recording characteristic because the reference power ratio shows the power ratio for recording information at the optimum characteristics.

REFERENCES:
patent: 5640381 (1997-06-01), Call et al.
patent: 6950377 (2005-09-01), Matsuura et al.
patent: 7050367 (2006-05-01), Negishi et al.
patent: 7-73496 (1995-03-01), None
patent: 9-16964 (1997-01-01), None
patent: 9-293259 (1997-11-01), None
patent: 2003-85753 (2003-03-01), None

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