Vartiainen, I., Mohacsi, I., Stachnik, K., Guizar-Sicairos, M., David, C., & Meents, A. (2016). Zernike x-ray ptychography. Optics Letters, 41(4), 721-724. https://doi.org/10.1364/OL.41.000721
We present an imaging technique combining Zernike phasecontrast imaging and ptychography. The contrast formation is explained by following the theory of Zernike phasecontrast imaging. The method is demonstrated with x-rays at a photon energy of 6.2 keV, showing how ptychographic reconstruction of a phase sample leads to a Zernike phasecontrast image appearing in the amplitude reconstruction. In addition, the results presented in this Letter indicate an improvement of the resolution of the reconstructed object in the case of Zernike ptychography compared with the conventional one.