Phase estimation from digital holograms without unwrapping.
Phase estimation from digital holograms without unwrapping.
复制标题
DOI：
10.1364/oe.22.021340
复制
发表时间：
2014-09
期刊：
影响因子：
3.8
通讯作者：
I. Iglesias
中科院分区：
文献类型：
--
作者：
I. Iglesias
数字全息术是一种方便的测定透明物体引起的相位的方法。当相位变化大于2π时，需要一种解包裹算法来提供有用的相位图。在存在噪声的情况下，这个过程不是微不足道的，也不是完全解决的。本文提出了一种方法，通过直接从重建场中计算相位梯度来估计相位，从而避免了解包裹的需要。介绍了该方法在显微样品数字全息图中的应用。
Digital holography is a convenient method for determining the phase induced by transparent objects. When the phase change is higher than 2π, an unwrapping algorithm is needed to provide a useful phase map. In the presence of noise, this process is not trivial and not fully resolved. In this paper a procedure is proposed to circumvent the need for unwrapping by estimating the phase from its gradient, which is directly computed from the reconstructed field. Application of the method to digital holograms of microscopic samples is demonstrated.