Yaroshenko Andre, Bech Martin, Potdevin Guillaume, Malecki Andreas, Biernath Thomas, Wolf Johannes, Tapfer Arne, Schüttler Markus, Meiser Jan, Kunka Danays, Amberger Maximilian, Mohr Juergen, Pfeiffer Franz
Opt Express. 2014 Jan 13;22(1):547-56. doi: 10.1364/OE.22.000547.
X-ray imaging using a Talbot-Lau interferometer, consisting of three binary gratings, is a well-established approach to acquire x-ray phase-contrast and dark-field images with a polychromatic source. However, challenges in the production of high aspect ratio gratings limit the construction of a compact setup for high x-ray energies. In this study we consider the use of phase gratings with triangular-shaped structures in an x-ray interferometer and show that such gratings can yield high visibilities for significantly shorter propagation distances than conventional gratings with binary structures. The findings are supported by simulation and experimental results for both cases of a monochromatic and a polychromatic source.
使用由三个二元光栅组成的塔尔博特-劳干涉仪进行X射线成像，是一种利用多色源获取X射线相衬和暗场图像的成熟方法。然而，高纵横比光栅制造方面的挑战限制了用于高X射线能量的紧凑型装置的构建。在本研究中，我们考虑在X射线干涉仪中使用具有三角形结构的相位光栅，并表明与具有二元结构的传统光栅相比，这种光栅在显著更短的传播距离下就能产生高可见度。单色源和多色源两种情况下的模拟和实验结果都支持了这些发现。
