全息术
光学
数字全息术
光强度
数字成像
计算机科学
物理
相(物质)
强度(物理)
直线(几何图形)
计算机视觉
图像处理
数字图像
图像(数学)
数学
几何学
量子力学
作者
Alok K. Gupta,Naveen K. Nishchal
出处
期刊:Journal of Optics
[IOP Publishing]
日期:2021-03-19
卷期号:23 (2): 025701-025701
被引量:6
标识
DOI:10.1088/2040-8986/abe18a
摘要
Abstract In one of our recent studies, we have shown that a large defocusing distance in the transport of intensity equation (TIE) is required to retrieve the phase information in low-light conditions (OSA Continuum 3 (2020) 236). It has been found that image misalignment issues come into the picture due to translation of the camera for large distances, which creates artifacts in phase recovery. The issue of misalignment can be overcome if, instead of the object, we use the digital hologram of the object for the required defocused intensities and then apply the TIE. In this paper, we demonstrate low-light phase imaging by combining digital holography with the TIE. We reconstruct the required multiple intensity distributions from the captured in-line digital hologram. To implement the low-level light illumination, a variable neutral density filter has been used while recording the in-line digital hologram. Simulation and experimental results with different objects (United States air-force chart and glue drop) are presented. To simulate the low-light conditions, a Poisson distribution based photon-counting imaging technique has been applied.
科研通智能强力驱动
Strongly Powered by AbleSci AI