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Its ability to accurately determine the illumination probe has led to its use at modern synchrotrons and free-electron lasers as a wavefront-sensing technique for optics alignment, monitoring and correction. Recent developments in the ptychography reconstruction process now incorporate a modal decomposition of the illuminating probe and relax the restriction of using sources with high spatial coherence. In this article a practical implementation of hard X-ray ptychography from a partially coherent X-ray source with a large number of modes is demonstrated experimentally. A strongly diffracting Siemens star test sample is imaged using the focused beam produced by either a Fresnel zone plate or beryllium compound refractive lens. The recovered probe from each optic is back propagated in order to plot the beam caustic and determine the precise focal size and position. The power distribution of the reconstructed probe modes also allows the quantification of the beams coherence and is compared with the values predicted by a Gaussian\u2013Schell model and the optics exit intensity.<\/jats:p>","DOI":"10.1107\/s1600577520012151","type":"journal-article","created":{"date-parts":[[2020,10,16]],"date-time":"2020-10-16T16:26:37Z","timestamp":1602865597000},"page":"1688-1695","update-policy":"https:\/\/doi.org\/10.1107\/cm_01","source":"Crossref","is-referenced-by-count":11,"title":["Hard X-ray ptychography for optics characterization using a partially coherent synchrotron source"],"prefix":"10.1107","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0597-2215","authenticated-orcid":true,"given":"Thomas E. 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