光学
波前
点扩散函数
针孔(光学)
全息术
光传递函数
物理
光圈(计算机存储器)
空间频率
基点
迭代重建
图像分辨率
计算机科学
人工智能
声学
作者
Xuelian Yu,Kangwei Wang,Jun‐Jun Xiao,Xiufang Li,Sun Yan-Qian,Hao Chen
出处
期刊:Optics Letters
[Optica Publishing Group]
日期:2021-11-19
卷期号:47 (2): 409-409
被引量:18
摘要
Coded aperture correlation holography (COACH) needs the point spread function (PSF) for image reconstruction. Utilizing a pinhole to generate a point light source is the most frequently adopted method for measuring PSF, which, however, has significant issues to resolve. One of the problems is that the resolution of the reconstructed result is limited by the cutoff frequency of the pinhole. The other is that the far-field PSF is undetectable because the amount of light illuminance decreases with the distance. In this work, we present a method for recording the PSF based on wavefront modulation. By modulating a plane wave with both the carrier spherical wave and the coded phase mask, we obtain a virtual point spread function (VPSF) that is used for image reconstruction. It is shown that the resolution of reconstructed results is not limited by the pinhole. We experimentally demonstrate high-resolution reconstruction by the VPSF.
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