为提高全息成像的分辨率, 对超分辨率数字全息进行实验研究, 介绍了全息和超分辨率的基本理论。试验中以激光二极管尾纤发射端作为点光源, 采用非放大的光路系统, 拍摄了一组亚像素位移的LR全息图。通过对LR全息图和SR全息图重建的结果对比,结果显示该方法能够实现全息图亚像素位移, 经超分辨率重建的图像分辨率明显提升。通过使用更高精度的位移装置和更有针对性的超分辨率算法将会进一步提升效果。

A method of increasing the resolution ability of holography is researched. The basic theories of holography and super-resolution are introduced. A laser diode with pigtail is used as light resource. Using a non-amplifying optical path system, a set of LR hologram of subpixel displacement are taken. By comparing the results of LR hologram and SR hologram reconstruction, the results show, that sub-pixel shift is available and the image resolution advances after the super-resolution reconstruction. To further promote the effect, a more accurate displacement system and targeted algorithms can be applied.