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Test methods for a recording method based on pitlängenmodulation and optical information recording - / reproducing apparatus which is used this test method
Test methods for a recording method based on pitlängenmodulation and optical information recording - / reproducing apparatus which is used this test method
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机译:用于基于皮尔根调制的记录方法的测试方法和使用该测试方法的光学信息记录/再现设备
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摘要
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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