Patent ID: 7343003
Filing Date: 2008-03-11
Classification: G21K

Abstract:
1. An X-ray diaphragm comprising: plural sets of X-ray absorbing plates, each of the plural sets comprising four of said X-ray absorbing plates, the four X-ray absorbing plates in each of the plural sets being arranged such that a first pair of X-ray absorbing plates are opposed to each other and a second pair of X-ray absorbing plates are opposed to each other and perpendicular to each of the first pair of X-ray absorbing plates to define a quadrangular aperture, wherein adjacent plates overlap each other partially at four corners of the aperture, the apertures in the plural sets of X-ray absorbing plates being coaxial and adjacent apertures positioned and increasing in size in an X-ray irradiating direction; and a support device for supporting the plural sets of the plates in such a manner that the plates located on the same sides in the plural sets are supported respectively by the support device throughout the plural sets, the support device coupling each of the plural sets such that the plural sets are configured to be driven in unison.