Patent ID: 7646849

Claim:
An ultra-small angle X-ray scattering measuring apparatus comprising: an X-ray generation device for emitting X-rays radiated from an X-ray real focus with a predetermined focus size toward a sample; an X-ray detection device for detecting X-rays emitted from the sample; an X-ray collimating mirror arranged between the X-ray real focus and the sample; a monochromator arranged between the X-ray collimating mirror and the sample; and an analyzer arranged between the sample and the X-ray detection device, wherein: said X-ray collimating mirror includes a first mirror and a second mirror arranged orthogonally relative to each other, the first mirror and the second mirror each having a multilayer film formed by alternately laying layers of a heavy element and layers of a light element so as to operate as an X-ray reflection surface; the multilayer film has a profile of a paraboloid, and is comprised of lattice places having an interplanar spacing, the interplanar spacing of the lattice planes of the multilayer film being made to continuously change along the paraboloid so as to satisfy the Bragg's condition for diffraction at any arbitrarily selected position on the X-ray reflection surface relative to X-rays of a specific wavelength; the monochromator and the analyzer each have a pair of oppositely disposed X-ray reflection surfaces and are formed of a perfect crystal; while the analyzer is driven to rotate for scanning around a 2θ-axial line orthogonal relative to an X-ray optical axis running through the analyzer, the X-ray detection device is configured to detect X-rays at every angular position within the scanning rotation of the analyzer; and the first mirror and the second mirror are inclined respectively relative to a plane which includes the X-ray optical axis and is orthogonal to the 2θ-axial line by an angle of 45 degrees.