液晶散射法产生部分相干光实验

摘要

对无阶梯诱导空间非相干技术中前级光源太弱的问题进行了分析，开展了前级部分相干源的研究工作。利用向列液晶的电光特性，选用两种液晶盒作为散射体，完成了液晶散射法产生部分相干源的原理性实验，得出液晶散射光能量透过率、均匀性及相干性与外加电场的关系。实验表明通过改变外加电场，可以提高液晶散射光的强度和均匀性，同时降低其空间相干性。%The characteristics of front-end light, a key problem in EFISI(Echelon-Free Induced Spatial Incoherence), is analyzed in this paper, and a new partial coherence light source is researched here. According to electrooptical properties of nematic liquid crystal, two types of liquid crystal are used as scattering materials to carry out the experimental study of the partial coherence light source designed for EFISI. The relationships between applied voltage and energy transmissvity, uniformity, coherence of scattering light are obtained. Results show that both intensities and uniformity of scattering light can be improved, at the same time coherence can be decreased through changing the applied electrical field. So the partial coherence light source can be approached.