基片缺陷与磁光盘原始误码

分析了基片缺陷导致磁光盘产生原始误码的原因。首次建立了磁光读出光场与基片杂质特性的数学模型，利用数值分析方法研究了读出信号畸变、误码长度与杂质特性的关系。分析结果表明，一定大小的基片杂质是否产生误码，与杂质距记录层的距离、杂质距读写光斑的距离以及读出阈值电平等因素有关。

Analysis of the Relationships Between Substrate Defects and Bit Errors for Magneto-Optical Disks

The causes of substrate defer producing bit errors for magneto-optical disks are analysed, and the mathematical model for describing the relation of readout waveform diStribution and the foreign substance contained in substrates is establised. On the basis, an analysis of the relationships between runout signal distortion, bit error length and foreign substances is given by numerical method. It is shown that whether a foreign substance of some size causes bit errors or not depends on many factors, such as the disboce of a foreign suhance from the recording plane, and, the distance of a foreign substance from the readout spot, as well as the readout threshold voltage.