非相干光自干涉数字全息成像技术研究

采用了一种基于Michelson干涉仪的非相干光自干涉数字全息成像系统，利用该系统记录了USAF1951分辨率板、洋葱表皮细胞、草本植物茎横切的全息图，采用三步广义相移法对所记录的全息图进行数值重建，消除零级像和共轭像后，获得了高分辨率的重建像。重建后的USAF1951分辨率板的第九组第三线对可以清晰地被看到，分辨率可达645 lp/mm。通过分析重建图像质量与衍射距离的关系，研究衍射距离对重建图像质量的影响。通过对头发全息图的重建，证明了该系统可以实现对三维物体全息图的记录和重建。

Research on incoherent self-interference digital holography imaging technology

An incoherent self-interference digital holography imaging system based on Michelson interferometer was reported. The system recorded the holograms of USAF1951 resolution target, onion epidermal cell and herbaceous stem crosscut. Reconstructing the captured hologram by three-step generalized phase shift can effectively eliminate zero-order images and twin images, and obtain a high resolution reconstructed image. The element three in group nine on the USAF1951 resolution target can be clearly seen, with a resolution of 645 lp/mm. The effect of diffraction distance on the quality of reconstructed image was studied by analyzing the relationship between them. Moreover, a 3D image of the object can be obtained by this system through reconstruction of the hair hologram.