偏振旋转孔散斑照相法

Polarized Rotating Aperture Used in Speckle Photography

文提出动态散斑技术中一种新的孔径:偏振旋转孔。在旋转孔径处适当布置偏振片能使衍射晕能量分布均匀,信息存储合理,散斑条纹清晰度提高。偏振转孔法能在一张散斑图上记录下全部动态过程,并连续地再现出来。本文介绍了偏振菱位孔,偏振平移孔,偏振四扇孔,论述了它们的全场分析和逐点分析功能,给出了理论分析和实验证明。

A new type of aperture-Polarized rotating aperture-is proposed in dynamic speckle technique. By this method the intensity of diffraction halo distrbutes evenly; the information is stored rationally; and the speckle fringrs are cleater. The information of whole dynamic process can be recorded on a single specklegram and reproduced continuously by this method. Several Kinds of polarized aperture are discussed.