Fractional Talbot images of optical gratings acting as periodic phase objects have been obtained by use of x rays of 0.069-nm wavelength from a third-generation synchrotron radiation source. Quantitative evaluation of the data obtained as a function of defocusing distance provides information on the lateral coherence of the beam as well as on the phase modulation in the object.
© 1997 Optical Society of America
P. Cloetens, J. P. Guigay, C. De Martino, J. Baruchel, and M. Schlenker, "Fractional Talbot imaging of phase gratings with hard x rays," Opt. Lett. 22, 1059-1061 (1997)