Scanning wavefront folding interferometers

被引：18
|
作者：
Koivurova M. [1 ]
Partanen H. [1 ]
Lahyani J. [2 ,3 ]
Cariou N. [2 ,3 ]
Turunen J. [1 ]
机构：
[1] Institute of Photonics, University of Eastern Finland, P. O. Box 111, Joensuu
[2] University of Paris-Sud, Polytech Paris-Sud, Maison de l’Ingenieur Bat 620 Rue Louis de Broglie, Orsay
[3] ONERA – The French Aerospace Lab, Chemin de la Hunière, Palaiseau
来源：
Optics Express | 2019年 / 27卷 / 05期
基金：
芬兰科学院;
关键词：
Degree of coherence - Digital micro-mirror device - Polarization effect - Spatial coherence - Spatial coordinates;
D O I：
10.1364/OE.27.007738
中图分类号：
学科分类号：
摘要：
We present modified scanning-type wavefront folding interferometers (WFIs), which allow spatial coherence measurements of non-uniformly correlated fields, where the degree of coherence is a function of two absolute spatial coordinates instead of coordinate separation only (Schell model). As an alternative to conventional prism-based WFI implementations, we introduce a scheme based on reflections by three mirrors. This setup allows us to avoid obstructions due to prism corners, and it is remarkably robust to polarization effects. Experimental results on measurement of fields that do not obey the Schell model are provided with the three-mirror WFI, and the results are compared to those obtained with a Young’s interferometer realized using a digital micromirror device. © 2019 Optical Society of America.
引用
收藏
页码：7738 / 7750
页数：12
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