吸收媒质界面上反射束的非镜像纵向位移

导出可用于计算来自吸收媒的反射束之ｓ偏振及ｐ偏振的纵向焦位移值的两个表达式。计算表明，Ｆｐ是正值，即ｐ波沿反射方向漂移；Ｆｓ是负值，因而ｓ波沿相反方向漂移。若令消光系数为零，这两个表达式简化成Ｃｈａｎ和Ｔａｍｉｒ给出的但仅适用非吸收媒质的公式。

Nonspecular Longitudinal Shift of the Beam Reflected From an Interface Containing Absorbing Medium

Two expressions presented in this paper may be employed to calculate the valueof longitudinal focal displacement of the reflected beam from an absorbing medium forboth s and p polarization. Our calculations show that Fp is POsitive (p-wave shifts alongthe reflected direction), and Fs is negative (s- wave shifts along the oppositive).Assuming that the extinction coefficient equals to zero, the two expressions can besimplified to the forms given by C. C. Chan and T. Tamir which fit only for the nonabsorbing medium.