Recent trends of projection X-ray microscopy in Japan

Recent activities of projection X-ray microscopy in Japan are reviewed. 1) By employing high brightness Schottky electron gun, resolution of 0.1 µm is realized by Tohken CO. group and some application examples are shown. 2) Deblurring of Fresnel diffracted image formed by synchrotron orbital radiation (SOR) X-rays is successfully tried by Chiba University group. Remarkable Fresnel fringes appearing at HeLa cell are mostly reconstructed by an iteration method. 3) Element analysis is carried out by Meiji University group utilizing absorption-edge characteristics between two kinds of X-ray targets without X-ray spectrometer. Actually, Cu and Ni targets are used with an inter-changeable system for elemental analysis of Fe2O3 particles and iron component in a mosquito larva.