title: Zernike-type phase-contrast hard X-ray microscope with a zone plate at the Photon Factory.
abstract: A Zernike-type phase-contrast X-ray microscope with a zone plate and a phase plate was constructed at the Photon Factory BL3C2. Parallel monochromatic X-rays of 8.97 keV were incident on a specimen and a direct beam transmitted through the specimen was focused on the back focal plane of the zone plate, where an aluminium phase plate was placed. Tantalum line patterns as fine as 0.3 microm could be imaged. Phase-contrast images of polypropylene wires and polystyrene latex beads were obtained, which showed better contrast than that of their bright field images.
authors.affiliation: Institute of Applied Physics, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8573, Japan.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Yokosuka
authors.forename: Norio
authors.initials: N
authors.lastname: Watanabe
authors.forename: Takuji
authors.initials: T
authors.lastname: Ohigashi
authors.forename: Yasutoshi
authors.initials: Y
authors.lastname: Yoshida
authors.forename: Shunichi
authors.initials: S
authors.lastname: Maeda
authors.forename: Sadao
authors.initials: S
authors.lastname: Aoki
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Suzuki
authors.forename: Akihisa
authors.initials: A
authors.lastname: Takeuchi
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Takano