用于光盘分析的标量衍射理论综述

Survey on the scalar diffraction theory for the optical disk

标量衍射理论是最早用于分析光盘读出光场的理论,它用标量函数描述光场,计算和理解读出过程比较简单。在只读光盘(CD及其兼容类)发展的过程中,它一直扮演着基础理论的角色。综述和比较了1970年以来的一些标量衍射理论,重点讨论了光盘信息符的模型及标量衍射分析方法等。对各种方法的优缺点作了评述,对如何定量描述标量衍射理论在分析高密度光盘方面的局限性问题提出了建议。

The scalar diffraction theory has been used to analyze the optical disk readout signal since the optical disk appeared. It describes the optical field with the scalar function, makes the calculation of the readout signal not complex and understands the reading process easy. During the development of CD, it always acts as the basal theory. Some scalar diffraction theories, including its development and limitation since 1970 from the view of optical disk model and the analyzing methods, are surveyed. The advantages and disadvantages for each method are discussed and some hints to further research on the validity of the scalar theory are put forward.