Measurement of spatial coherence through the shadow of small obscurations

Katelynn A. Sharma; James K. Wood; Miguel A. Alonso; Thomas G. Brown

doi:10.1117/12.2071108

5 September 2014 Measurement of spatial coherence through the shadow of small obscurations

Katelynn A. Sharma, James K. Wood, Miguel A. Alonso, Thomas G. Brown

Proceedings Volume 9205, Reflection, Scattering, and Diffraction from Surfaces IV; 92050G (2014) https://doi.org/10.1117/12.2071108
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

Abstract

We present a simple method to measure the spatial coherence of a partially coherent field by analyzing far-field measurements with and without a well-characterized obscuration. From these measurements, the coherence can be estimated for all pairs of points whose centroid is the obstacle's centroid. By scanning the obstacle over the test plane, one can recover the four-dimensional coherence function. In principle, such measurements can be performed without any refractive or diffractive elements, allowing them to be done in higher frequency regimes.

Citation Download Citation

Katelynn A. Sharma, James K. Wood, Miguel A. Alonso, and Thomas G. Brown "Measurement of spatial coherence through the shadow of small obscurations", Proc. SPIE 9205, Reflection, Scattering, and Diffraction from Surfaces IV, 92050G (5 September 2014); https://doi.org/10.1117/12.2071108

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