Focusing Properties of a grazing-incidence mirror system are tested using a monochromatized synchrotron radiation X-ray source. The optical system employs two mirrors, each of elliptical cylinder shape, arranged in a crossed-mirror geometry (Kirkpatrick-Baez configuration) and generates a demagnified image of a 100-mu-m-diameter pinhole placed upstream in the beamline as the X-ray source. Edge-scan profiles show the focused spot size at half-maximum of about 1.7-mu-m x 3.8-mu-m at a wavelength of 2.3 angstrom. In two-dimensional scanning of test patterns, a fine pattern of a 0.6-mu-m line and 0.6-mu-m space was resolved.