Patent Number: 
Section: claims

1. An apparatus for X-ray analysis of a sample, including: an X-ray source for irradiating the sample by means of X-rays,  an X-ray detector for detecting X-rays emanating from the sample,  a parabolic multilayer mirror which is arranged in a beam path between the sample and the detector and has an associated reflection angle range xcex1 max , and  a first collimator is arranged in such a manner that it exhibits substantially the same angular value of a passage width from every reflecting point of the multilayer mirror, and  that said angular value, viewed from every reflecting point of the multilayer mirror, is smaller than a maximum reflection angle range xcex1 max . 2. An apparatus as claimed in  claim 1 , wherein the angular value for the passage width of the first collimator that is observed from the reflecting mirror surface is adjustable. claim 1 3. An apparatus as claimed in  claim 1 , wherein the first collimator is formed by two mutually parallel knife edges which are situated at different distances from the reflecting points of the multilayer mirror. claim 1 4. An apparatus as claimed in  claim 3 , wherein the knife edges are displaceable relative to one another by displacement transversely of the direction of the beam path through the collimator. claim 3 5. An apparatus as claimed in  claim 1 , provided with a second, adjustable collimator which is arranged in the beam path between the sample and the detector. claim 1