摘要
分析了光学全反射现象发生时的折射角,指出这时的折射角是一个复数,其实部等于π/2,虚部决定了光疏介质中渐消光场的衰减常数,给出了用虚部表示的Snell折射定律.最后讨论了入射角小于临界角时Snell定律的对偶形式.
The angle of refraction at total optical reflection is analyzed. It is shown that this angle is a complex. The real part is equal to π/2, and the imaginary part determines the decaying constant of evanescent wave in the optically thinner medium. The Snell's law is expressed in terms of the imaginary part of the refraction angle. The dual form of Snell's law is then given for the incidence angle less than the critical angle.
出处
《上海大学学报（自然科学版）》
CAS
CSCD
2002年第6期523-525,共3页
Journal of Shanghai University:Natural Science Edition
基金
上海市青年科技启明星计划 (99QA1 40 0 1 )
上海市教育发展基金会上海市教育委员会曙光计划(0 1 SG46)资助项目
