散射光波场卷积重建的三种方法研究  

Three Methods for Scattering Wave Fields Reconstruction by Convolution

作　　者：李俊昌[1] 楼宇丽[1] 桂进斌[1] 

机构地区：[1]昆明理工大学,昆明650093

出　　处：《光子学报》2009年第5期1176-1181,共6页Acta Photonica Sinica

基　　金：云南省自然科学基金(2007F028M);昆明理工大学青年基金(2006-23)资助

摘　　要：将数字全息检测物体的表面视为散射面,当物体投影尺寸远大于CCD面阵尺寸时用球面波为重建波,对物平面光波场卷积重建过程进行了理论研究.导出了重建物光场放大率与重建参量的关系.介绍了通过补零扩大CCD平面以及对物体局域重建组合的另外两种卷积重建方法.通过实验对三种方法进了行比较.结果表明,球面波为重建波的方法优于另外两种方法.Using spherical wave as the reconstructive wave, the convolution reconstruction process of object plane optic wave field was studied theoretically when the object projection size was much larger than CCD array size and the object surface detected by digital holography was regarded as scattering surface. The relationship between magnification of the reconstructed object field and the reconstruction parameters was also derived. The other two methods of convolution reconstruction were introduced briefly, which were expanding CCD plane with zero-padding and combination of local reconstruction object. These three methods were experimentally compared with. And the results show that the method using spherical wave as the reconstructive wave is better than the rest.

关 键 词：全息技术 无损检测 数字全息 波面重建 

分 类 号：TB877[一般工业技术—摄影技术]