Optical recording methods and apparatus using light modulation t

Details Optical recording methods and apparatus using light modulation t Optical recording methods and apparatus using light modulation t

1996-11-25

1998-04-21

Dinh, Tan

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369116, G11B 1100

Patent

active

057425663

ABSTRACT:
In an optical recording a shape of a mark which is a data recording area can be formed into a desired shape even if a temperature of an optical recording medium changes. The present invention provides a temperature detecting means for detecting the temperature of the optical recording medium and a laser power adjusting means for adjusting first laser power and second laser power on the basis of the detected temperature, and the mark is recorded in the optical recording medium by using the adjusted first laser power and the adjusted second laser power. Thereby, even if the temperature of the optical recording medium changes with influence of environmental temperature, a recording operation can be performed with an optimum laser power determined based upon the temperature of the optical recording medium. Thus, even if the temperature of the optical recording medium changes, the shape of the mark which is the data recording area can be formed into the desired shape.

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patent: 5329512 (1994-07-01), Fukimoto et al.
patent: 5461603 (1995-10-01), Otsuka
patent: 5513165 (1996-04-01), Ide et al.
patent: 5625616 (1997-04-01), Koike et al.

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