相移数字全息成像孔径合成数值模拟

XU Xian-feng,YUAN Hong-guang,LU Guang-can,ZHANG Qian

提出相移数字全息中以子图拼接扩大等效芯片尺寸来提高分辨率的方法。使用相关方法拼接了相移数字全息中4幅子图,扩大了记录范围,提高了成像分辨率。以4条5μm宽的狭缝为实验物体进行了模拟实验。结果表明,孔径合成技术能够明显提高系统成像分辨率,经孔径合成后分辨宽度达到5μm。

A method to enlarge the size of recording chip by stitching sub interferograms in phase shifting interferometry is suggested.4 interferograms recorded on the same objective plane are combined to enlarge the recording area and improve the imaging resolution.As the object four 5 μm slims are used in the simulative experiment.The results show that this aperture synthesis method can improve the imaging resolution obviously and the resolution can be improved to 5 μm after aperture synthesis.