X ray interferometer with twin zone plates

Abstract

The invention provides a twin wave zone plate X-ray interferometer, which comprises X-ray source and is characterized by the following: it is to locate first wave zone plate and second wave zone plate with their centers slight bias and close along the direction of X-ray moving direction; it is to locate a sample rack behind the focuses of the first and second wave zone plates; then to locate a X-ray detector to detect interferometer photograph.

Description

Technical field [0001] The invention relates to an X-ray interferometer, in particular to a twin zone plate X-ray interferometer Background technique [0002] Since the X-ray wavelength is much shorter than that of visible light, when it is used for precision detection, the theoretical resolution is 2 to 4 orders of magnitude higher than that of visible light. Therefore, high-resolution interferometric research can be carried out using X-ray interference technology. [0003] In 1965, the first X-ray interferometer developed by U. Bonse and M. Hart of Cornell University in the United States was composed of three parallel single crystal silicon. Based on the principle of crystal diffraction, the first crystal was used as Beam splitter, the second crystal combines the two X-rays. Since the X-ray wavelength is much shorter than that of visible light, the interference fringes formed by them are too dense to be directly observed with the naked eye. The third crystal solves the problem....

AI Technical Summary

Problems solved by technology

The biggest disadvantage of this kind of interferometer is that it needs three high-quality crystals, not only the direction of the crystal planes must be consistent, but also the three crystals must be parallel to each other, which undoubtedly brings difficulties to crystal growth and processing.

[0004] In April 2004, Gao Hongyi and others from the Shanghai Institute of Optics and Mechanics of the Chinese Academy of Sciences proposed a simple X-ray interferometer (see prior art: China Patent Office Patent Application No.: 200410017870.6), which has a very simple structure and can be obtained in biomedicine and other fields. Wide range of applications, but the two glass plates used in this interferometer require high precision machining

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