Patent Number: 
Section: claims

1. An arrangement for collimating electromagnetic radiation, comprising:a macrocollimator which defines at least two cutouts, the macrocollimator defining a plurality of parallel notches on opposite faces of each of the cutouts; andmicrocollimator structures which are positioned in the cutouts of the macrocollimator and have lamellae that absorb electromagnetic radiation, so that collimator channels are formed which in each case extend such that they are transparent in a transmission direction, ends of at least some of the lamellae being received in the macrocollimator notches. 2. An arrangement as claimed in claim 1, wherein the lamellae of the microcollimator structures define a plurality of closed collimator channels and along opposite sides define open collimator channels which perpendicular to the transmission direction are not completely enclosed by lamellae, lamellae of the open collimator channels beign received in the macrocollimator notches and the enclosure is completed by walls of the macrocollimator. 3. An arrangement as claimed in claim 1, wherein the cutouts are arranged in a focusing manner. 4. An X-ray detector unit comprising an arrangement as claimed in claim 1. 5. An X-ray detector unit as claimed in claim 4, wherein at least one of the microcollimator structures is integrally provided with elements of the X-ray detector unit. 6. An X-ray device comprising an arrangement as claimed in claim 1. 7. A method of producing an arrangement for collimating electromagnetic radiation, said method comprising the following steps:manufacturing a macrocollimator which has at least two cutouts,manufacturing microcollimator structures which have lamellae that absorb electromagnetic radiation,inserting the microcollimator structures in the cutouts so that collimator channels are formed which in each case extend such that they are transparent in a transmission direction. 8. A method as claimed in claim 7, wherein at least one of the microcollimator structures has been produced in a casting or injection molding method. 9. A method as claimed in claim 7 wherein the macrocollimator is manufactured in a process separate from the microcollimators and subsequent to their manufacture the microcollimators are frictionally received within cutouts defined by the macrocollimator. 10. A method as claimed in claim 7 wherein the macrocollimator and microcollimators are manufactured separately. 11. A collimator having precise collimation channels for collimating electromagnetic radiation comprising:a macrocollimator encircling and defining a plurality of cutouts which are large relative to the collimator channels;a plurality of microcollimators having lamellae which define the collimator channels, the microcollimators each conforming to a size of the cutouts and being configured to be inserted into and received by one of the cutouts such that the macrocollimator guiding the received microcollimators into an orientation in which the collimator channels extend in an electromagnetic radiation transmission direction. 12. The collimator as claimed in claim 11, wherein the microcollimator defines positioning structures on a surface of each of the cutouts, the positioning structures interacting with the microcollimator structures during insertion to position the microcollimator structures relative to the macrocollimator. 13. The collimator as claimed in claim 12, wherein the positioning structures include guides extending along surfaces of the macrocollimator which define the cutouts. 14. The collimator according to claim 13, wherein the guide structures includes notches or channels which extend parallel to the electromagnetic radiation transmission direction. 15. The collimator as claimed in claim 11, wherein the lamellae are made of an electromagnetic radiation absorbent material, and further including:a material which is only slightly electromagnetic radiation absorbent relative to the material of the lamellae which fills the collimator channels.