摘要
为了研究3层物体的压缩全息分层再现效果,进行了层析再现多层样本的实验,并且将压缩全息再现与传统反衍射重建方法进行了对比分析。采用了频域减采样的方法来实现全息图的稀疏化,将数据压缩到原始全息图的25%。通过仿真实验,发现采用压缩全息再现的物像和模拟样本的相关系数达到0.64。基于4f光学系统建立了实验系统,实现了3层物体的压缩全息再现,可以使所重建的物像更加清晰以及有效去除背景噪声信号。
In order to study the reconstruction effect of three-layer samples using compressive holography, tomography experiment is proposed and compressive holography and traditional back-propagation digital holography is analyzed. The frequency domain sample reduction to make hologram sparse is used, remaining 25% data of the original hologram. Through the simulation experiment, that the correlation coefficient of the reconstructed image by compressive holography and simulation sample can reach O. 64. 4f optical system is introduced, and it separates three-layer samples apart with compressive holography method which can make reconstructed images much clearer and suppress background noise.
出处
《计量学报》
CSCD
北大核心
2017年第6期686-689,共4页
Acta Metrologica Sinica
基金
国家自然科学基金(61575119)
关键词
计量学
同轴压缩全息
4f光学系统
层析技术
多层透明样本
3层物体再现
metrology
in-line compressive holography
4f optical system
tomography
muhilayer transparentsamples
three-layer sample reeonstructioN
