Department of Computer Science, National University of Ireland, Maynooth, County Kildare, Ireland.
Opt Lett. 2009 Dec 1;34(23):3610-2. doi: 10.1364/OL.34.003610.
A method to numerically remove the twin image for inline digital holography, using multiple digital holograms, is discussed. Each individual hologram is recorded by using a statistically independent speckle field to illuminate the object. If the holograms are recorded in this manner and then numerically reconstructed, the twin image appears as a different speckle pattern in each of the reconstructions. By performing speckle-reduction techniques the presence of the twin image can be greatly reduced. A theoretical model is developed, and experimental results are presented that validate this approach. We show experimentally that the dc object intensity term can also be removed by using this technique.
讨论了一种使用多个数字全息图数值消除共线数字全息中的孪生像的方法。每个全息图都是通过使用统计独立的散斑场照明物体来记录的。如果以这种方式记录全息图，然后进行数值重建，孪生像将在每个重建中呈现出不同的散斑图案。通过执行散斑减少技术，可以大大降低孪生像的存在。本文建立了一个理论模型，并给出了验证该方法的实验结果。我们通过实验表明，也可以通过该技术去除直流物体强度项。
