An imaging soft X-ray microscope with zone plates has been installed a
t Rits SR Center (Ritsumeikan University, Kusatsu, Japan). With this m
icroscope, specimens were set in air, which made it possible to invest
igate the specimens without breaking the vacuum of the microscope. The
specimens can be prefocused with an optical microscope. Dry and wet b
iospecimens in air were observed. A new optical system was designed to
improve the resolution.