Stabilized overwriteable optical recording method using laser be

Details Stabilized overwriteable optical recording method using laser be Stabilized overwriteable optical recording method using laser be

1996-11-05

1998-09-15

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

058089721

ABSTRACT:
A stabilized overwriteable optical recording method, wherein overwriting is performed sufficiently because erasure does not become poor with a low level laser beam intensity P.sub.L set too low. The method includes setting the recording laser beam intensity in order to perform recording on an overwriteable optical recording medium, finding the lower limit value of laser beam intensity at which a high temperature process occurs, and, based on this lower limit value of laser beam intensity, provisionally setting a high level laser beam intensity. After magnetization reversal marks have been formed in a test recording region by this lower limit value, the test recording region is played back. Then, after the test recording region has been illuminated with a laser beam, performing erasure of the magnetization reversal marks. Then the test recording region is played back, and by making a comparison of the playback signals before and after erasure was performed, the optimum low level laser beam intensity is set.

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