Phase-shifting digital holography in image reconstruction  

作　　者：于瀛洁 周文静 Yannis Orphanos Vivi Tornari 

机构地区：[1]College of Mechatronics and Automation, Shanghai University, Shanghai 200072, P. R. China [2]Foundation for Research and Technology-Hellas, Vassilika Vouton, Heraklion 71110, Greece

出　　处：《Journal of Shanghai University(English Edition)》2006年第1期59-64,共6页上海大学学报（英文版）

摘　　要：A phase-shifting digital holography scheme developed to investigate internal defects in artworks is described. Phase-shifting is utilized to obtain a clear reconstructed object wave from a rough surface texture. A reverse-transform algorithm is employed to reconstruct the object wave on its original position of unknown distance or the imaging position from the object wave information on the holographic plane. To get the clearest reconstruction the exact registration of the unknown distance is determined by applying the intensity sum as the auto-focusing function, The spatial resolution of the reconstruction image is also investigated for a variety of affecting factors. Laboratory results of reconstruction images under deformation are presented.A phase-shifting digital holography scheme developed to investigate internal defects in artworks is described. Phase-shifting is utilized to obtain a clear reconstructed object wave from a rough surface texture. A reverse-transform algorithm is employed to reconstruct the object wave on its original position of unknown distance or the imaging position from the object wave information on the holographic plane. To get the clearest reconstruction the exact registration of the unknown distance is determined by applying the intensity sum as the auto-focusing function, The spatial resolution of the reconstruction image is also investigated for a variety of affecting factors. Laboratory results of reconstruction images under deformation are presented.

关 键 词：holographic interferometry digital holography phase-shifting technique reverse-transform algorithm auto-focusing function spatial resolution. 

分 类 号：TN911.73[电子电信—通信与信息系统]