MICROSCOPY Vol.46▶No.1 2011
â– Researches Today

Development of 30-picoradian positioning system for X-ray interferometer and its application for phase-contrast X-ray imaging

Akio Yoneyama, Satoshi Takeya, Kazuyuki Hyodo, Kazuhiro Ueda and Tohoru Takeda

Abstract: An ultra-precise positioning system for X-ray interferometer was developed for phase-contrast X-ray imaging. 30-picoradian rotational stability of the positioning tables was attained by increasing the mechanical rigidity of the tables, suppressing the drift rotation by feedback systems, and decreasing the mechanical vibration from the floor by an active air-suspension. The stability makes it possible to perform detailed three-dimensional observations of biomedical samples.

Key words: X-ray interferometer, phase-contrast, phase imaging, prad