León-Rodríguez Miguel, Rodríguez-Vera Ramón, Rayas Juan A, Calixto Sergio
Centro de Investigaciones en Óptica, León, Guanajuato, México.
J Opt Soc Am A Opt Image Sci Vis. 2012 Apr 1;29(4):498-506. doi: 10.1364/JOSAA.29.000498.
In this work, we present a new method to reduce the shot noise in phase imaging of digital holograms. A spatial averaging process of phase images reconstructed at different reconstruction distances is performed, with the reconstruction distance range being specified by the numerical focus depth of the optical system. An improved phase image is attained with a 50% shot noise reduction. We use the integral of the angular spectrum as a reconstruction method to obtain a single-object complex amplitude that is needed to perform our proposal. We also show the corresponding simulations and experimental results. The topography of a homemade TiO2 stepwise of 100 nm high was measured and compared with the atomic force microscope results.
在这项工作中，我们提出了一种新方法来降低数字全息相位成像中的散粒噪声。对在不同重建距离处重建的相位图像进行空间平均处理，重建距离范围由光学系统的数值焦深确定。获得了散粒噪声降低50%的改进相位图像。我们使用角谱积分作为重建方法来获得执行我们的提议所需的单物体复振幅。我们还展示了相应的模拟和实验结果。测量了自制的100纳米高的TiO₂ 阶梯的形貌，并与原子力显微镜的结果进行了比较。
