Nitric acid salts with medicines having an antihypertensive activity. In at least one embodiment, the X-ray detector includes a detector housing including a plurality of detector modules that extend into an interior space of the detector housing, the detector housing being designed to feed a coolant into the interior space. The overhangs cover a hetero-epitaxial interface region between a film expitaxially grown on the substrate and the substrate itself, thereby preventing a line-of-sight view along a surface norm of the substrate in the hetero-epitaxial interface region between the epitaxial film and the substrate. An advantage of this method is that complete drying between the subsequent coatings is not required. There exists, in optical paths of the first optical system and the second optical system, a common optical element with a plurality of optical surfaces including refractive surfaces and reflective surfaces formed on a same medium and the first optical system and the second optical system share a part of optical surfaces of that optical element.