显微数字全息中欠采样全息图的复原和利用

The restoration and utilization of undersampled holograms in microscopy digital holography

在数字全息中由于受CCD分辨率的限制,获得的全息图常存在欠采样问题.从理论上分析了欠采样出现的原因,给出了对其中欠采样全息图复原、利用的方法,并将其应用到显微数字全息中,得到了比较理想的细胞三维形貌,结果表明方法是有效的.与不进行复原的结果相比较,扩展了全息图的利用范围.由于数字全息中欠采样问题的普遍存在,方法具有实际的意义.

Since the recordation of digital holograms limited by the resolution of CCD,the obtained holograms are undersampled.The cause of this problem are analyzed and the method of recordation and utilization of the undersampled holograms is presented.With this method adopted in the experimental data processing of microscopy digital holography,a relatively perfect phase of onionskin cell could be obtained.And it proved that the method was effective.Compared with the results got from unrestored holograms,the method ...