Quantitative coherence analysis with an X-ray Talbot–Lau interferometer

Zhili Wang; Peiping Zhu; Wanxia Huang; Qingxi Yuan; Xiaosong Liu; Kai Zhang; Youli Hong; Huitao Zhang; Xin Ge; Kun Gao; Ziyu Wu
July 2010
Analytical & Bioanalytical Chemistry;Jul2010, Vol. 397 Issue 6, p2091
Academic Journal
Differential phase-contrast (DPC) X-ray imaging has been performed in the Talbot–Lau configuration, in which the X-ray source was a combination of an absorption grating and a laboratory X-ray generator. We report here quantitative analysis of partial coherence effects on the X-ray Talbot–Lau interferometer. Based on the visibility of the self-image, the well-known geometry condition is reproduced. It is shown that effects of partial coherence are determined by the opening ratio of the source grating, and that the effects are independent of the Talbot order and the type of the phase grating, a condition quite different from those in a Talbot interferometer. A possible explanation is discussed from the point of view of the effective spatial coherence length. Taking into account the available X-ray flux and experimental fluctuations, we present the optimum opening ratio. Furthermore, we mention that our results can also be successfully used to discuss the properties of a multiline X-ray source.


Related Articles

  • X-ray Interferometer Using Prism Optics. Suzuki, Yoshio; Warwick, T. // AIP Conference Proceedings;2004, Vol. 705 Issue 1, p724 

    Two-beam X-ray interferometer using refractive optics has been developed. A prism made of acrylic resin is used as the beam deflector for hard X-ray wavefront dividing interferometer. This configuration is the same as that of the Fresnel’s bi-prism interferometer or the Leith-Upatnieks...

  • Three Block X-Ray Interferometer with Fresnel Zone Plates. Haroutunyan, L.; Trouni, K.; Kuyumchyan, A. // AIP Conference Proceedings;9/9/2011, Vol. 1365 Issue 1, p243 

    A novel hard x-ray interferometer employing three optical Fresnel zone plates has been proposed. This amplitude-division type interferometer does not impose strong requirements on the coherence of the incident x-rays. Employing a magnifying system can lead to increased spatial resolution for...

  • Two-wavelength optical coherence tomography. Gelikonov, V. M.; Gelikonov, G. V.; Feldchtein, F. I. // Radiophysics & Quantum Electronics;Oct2004, Vol. 47 Issue 10/11, p848 

    We present the results of studies of the basic principles and describe the design of a low-coherence two-wavelength interferometer based on polarization-maintaining fiber. The interferometer was developed for optical coherence tomography (OCT) imaging of the internal structure of living...

  • Analysis of polychromaticity effects in X-ray Talbot interferometer. Zhili Wang; Peiping Zhu; Wanxia Huang; Qingxi Yuan; Xiaosong Liu; Kai Zhang; Youli Hong; Huitao Zhang; Xin Ge; Kun Gao; Ziyu Wu // Analytical & Bioanalytical Chemistry;Jul2010, Vol. 397 Issue 6, p2137 

    The influence of polychromaticity of the X-ray source on the performance of an X-ray Talbot interferometer applied for phase-contrast imaging is analyzed through numerical simulations based on the Fresnel diffraction theory. The presented simulation results show that the visibility of the...

  • Influence of radiation coherence on the effects of polarization nonreciprocity of fiber ring interferometers. Andronova, I. A. // Radiophysics & Quantum Electronics;Oct2004, Vol. 47 Issue 10/11, p882 

    In this paper, we consider the effects of polarization nonreciprocity taking into account coherence or partial coherence of radiation at the output of a fiber ring interferometer (FRI) and discuss the possibility of occurrence of additional effects of polarization nonreciprocity at the output of...

  • Improved phase modulation for an en-face scanning three-dimensional optical coherence microscope. Hoeling, Barbara M.; Peter, Mary E.; Petersen, Daniel C.; Haskell, Richard C. // Review of Scientific Instruments;Oct2004 Part I & II, Vol. 75 Issue 10, p3348 

    We have previously described an inexpensive method for modulating the interferometer of an en-face scanning, focus-tracking, three-dimensional optical coherence microscope (OCM). In this OCM design, a reference mirror is mounted on a piezoelectric stack driven at a resonance frequency of about...

  • Study of Deformation Fields as a Function of the Temperature Gradient in the Mirror Block of an Interferometer. Drmeyan, H. R. // Crystallography Reports;May2005, Vol. 50 Issue 3, p363 

    The formation of moiré fringes in an X-ray interferometer is studied. It is shown experimentally that the well-known expression for calculating the period of moiré pattern cannot be always used to calculate the period of moire patterns obtained in an X-ray interferometer. The change in the...

  • X-ray wavefront analysis and optics characterization with a grating interferometer. Weitkamp, Timm; Nöhammer, Bernd; Diaz, Ana; David, Christian; Ziegler, Eric // Applied Physics Letters;1/31/2005, Vol. 86 Issue 5, p054101 

    We present an interferometric method to measure the shape of a hard-x-ray wavefront. The interferometer consists of a phase grating as a beam splitter and an absorption grating as a transmission mask for the detector. The device can be used to measure wavefront shape gradients corresponding to...

  • X-ray Interferometers Based on Refractive Optics. Snigirev, A.; Snigireva, I.; Kohn, V.; Kuznetsov, S.; Yunkin, V. // AIP Conference Proceedings;9/9/2011, Vol. 1365 Issue 1, p285 

    A novel type of hard x-ray interferometers employing compound refractive lenses is proposed. One such interferometer is a bilens system with two parallel arrays of planar refractive lenses. Under coherent illumination the bilens generates two diffraction-limited mutually coherent beams. Slightly...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics