El Mallahi Ahmed, Dubois Frank
Université Libre de Bruxelles, Microgravity Research Center, Brussel, Belgium.
Opt Express. 2011 Mar 28;19(7):6684-98. doi: 10.1364/OE.19.006684.
We analyze the dependency and the accuracy of the refocusing criterion based on the integrated modulus amplitude in the case of amplitude object. Analytical dependencies on the defocus distance and the numerical aperture are found. This theoretical prediction for the refocusing criterion is well supported by simulation. We study also the robustness of the refocusing criterion by adding salt and pepper and speckle-type noises. We demonstrate that the refocusing criterion is robust up to an significant level of noise that can perturb the holograms.
我们分析了在振幅物体情况下基于积分模幅的重新聚焦判据的相关性和准确性。找到了对离焦距离和数值孔径的解析相关性。这种重新聚焦判据的理论预测得到了模拟的有力支持。我们还通过添加椒盐噪声和散斑型噪声来研究重新聚焦判据的稳健性。我们证明，重新聚焦判据在高达可能干扰全息图的显著噪声水平下都是稳健的。
