de Sande J Carlos G, Piquero Gemma, Teijeiro Cristina
Departamento de Circuitos y Sistemas, Universidad Politécnica de Madrid, Madrid, Spain.
J Opt Soc Am A Opt Image Sci Vis. 2012 Mar 1;29(3):278-84. doi: 10.1364/JOSAA.29.000278.
Lyot depolarizers are optical devices made of birefringent materials used for producing unpolarized beams from totally polarized incident light. The depolarization is produced for polychromatic input beams due to the different phase introduced by the Lyot depolarizer for each wavelength. The effect of this device on other types of incident fields is investigated. In particular two cases are analyzed: (i) monochromatic and nonuniformly polarized incident beams and (ii) incident light synthesized by superposition of two monochromatic orthogonally polarized beams with different wavelengths. In the last case, it is theoretically and experimentally shown that the Lyot depolarizer increases the degree of polarization instead of depolarizes.
列奥滤光器是由双折射材料制成的光学器件，用于将完全偏振的入射光转换为非偏振光束。对于多色输入光束，由于列奥滤光器对每个波长引入不同的相位，从而产生去偏振效果。研究了该器件对其他类型入射场的影响。特别分析了两种情况：（i）单色且非均匀偏振的入射光束，以及（ii）由两个不同波长的正交偏振单色光束叠加合成的入射光。在最后一种情况下，理论和实验均表明，列奥滤光器增加了偏振度，而不是使其去偏振。
