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发明授权
US5084857A Information recording method using a modulated recording beam at high, intermediate and low power levels 失效
使用高，中，低功率电平的调制记录光束的信息记录方法

Information recording method using a modulated recording beam at high, intermediate and low power levels
摘要：
The present invention relates to a method of recording on a rewritable recording medium using a laser beam capable of producing at least three discreet levels of power. The three levels of power used for writing to the recording medium is greater than the power required for reading. The present method is unique in that the power level of the laser beam is modulated between high, intermediate, and low levels over a time period so that at least three discreet power levels are radiated to the recording medium during recording. The increment of the radiation energy of the upward pulse from the intermediate level toward the high level is within the range of 0.8 to 1.2 times the decrement of the radiation energy of the downward pulse from the intermediate level to the low level. The present invention provides high density recording capability with minimum non-erasure areas even when the recording medium is formed from a high velocity crystallization (high speed erasure).
摘要（中）：

本发明涉及使用能够产生至少三个谨慎的功率的激光束在可重写记录介质上进行记录的方法。 用于写入记录介质的三个电源电平大于读取所需的功率。 本方法的独特之处在于，激光束的功率电平在一段时间内在高电平，中间电平和低电平之间被调制，使得在记录期间至少三个分立的功率电平被辐射到记录介质。 上升脉冲从中间电平向高电平的辐射能量的增量在从中间电平到低电平的向下脉冲的辐射能量减少的0.8到1.2倍的范围内。 即使当高速结晶（高速擦除）形成记录介质时，本发明提供具有最小非擦除区域的高密度记录能力。

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