偏振旋转孔散斑照相法  

Polarized Rotating Aperture Used in Speckle Photography

作　　者：顾杰[1] 沈永昭[1] 

机构地区：[1]苏州大学物理系

出　　处：《实验力学》1989年第3期243-248,共6页Journal of Experimental Mechanics

摘　　要：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.

关 键 词：偏振旋转孔 散斑照相法 散斑照相 

分 类 号：O348.11[理学—固体力学]