Write test method for use in recording process for recording inf

Details Write test method for use in recording process for recording inf Write test method for use in recording process for recording inf

1996-01-30

1998-09-29

Young, W. R.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 54, 369116, G11B 700

Patent

active

058154779

ABSTRACT:
A write test method for use in a recording process for recording information is effected by such that the power of a laser light is modulated to form a high-temperature state and a low-temperature state on a recording medium. First, a predetermined signal is recorded on the recording medium while varying the power level of the laser light. The information recorded on the recording medium is reproduced to detect the power level of the laser light, immediately before formation of the high-temperature state, based on the amplitude of a reproduced signal. The power levels of the laser light for forming the low-temperature state and for forming the high-temperature state are determined on the basis of the detected power level.

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