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10.串扰XT(Cross Talk):读出光斑直径总是大于CD-R盘片上预刻槽的宽度,而且光斑也不是强度均匀分布的几何圆,光斑的强度分布是高斯分布,通常所说的光斑直径是指高斯分布曲线的半高度的全宽度。事实上在光斑直径边缘甚至以外还是有光强分布的,只不过强度很弱而己。另外在预刻槽内刻录的信息凹坑往往也不只局限在槽宽范围内,凹坑可能扩大到槽边的岸区。这样读出光斑的边缘会覆盖相邻槽内的部分信息凹坑。这些相同频率范围的相邻槽内
10. Cross talk XT (Cross Talk): readout spot diameter is always greater than the CD-R disc pre-groove width, and the spot is not uniform intensity distribution of geometric circles, spot intensity distribution is Gaussian distribution, commonly referred to as The spot diameter refers to the full width at half height of the Gaussian distribution curve. In fact, there is even a light intensity distribution at the edge of the spot diameter, but the intensity is very weak. In addition, the pit information recorded in the pre-groove is often not limited to the groove width, and the pit may be extended to the land area on the groove side. This reading of the edge of the spot covers the partial information pits in the adjacent grooves. Adjacent slots in these same frequency ranges