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Updated: Dec 15, 2025

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
Published on: October 11, 2016
Measurement of the full complex degree of coherence using Fresnel diffraction from a phase discontinuity
Abstract:
A field-portable, single-shot and very simple method is presented for measuring the full complex degree of coherence (CDC) of a quasi-monochromatic Schell-model field using the Fresnel diffraction from a phase discontinuity. To validate the proposed technique, the CDC of the light emitted from an incoherent source with variable size is investigated. The results are in excellent agreement with theoretical predictions of the Van Cittert-Zernike theorem. This technique is also applicable to characterize the coherence properties of sources in other spectral regions, e.g., x-rays.
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