Patent Number: 
Section: claims

1. A collimator for a beam detector, comprising:at least two juxtaposed collimator plates; andat least one supporting element, arranged between at least two juxtaposed collimator plates, for stiffening the collimator, the at least one supporting element being constructed from a material transparent to X-rays and supporting the collimator plates laterally. 2. The collimator as claimed in claim 1, wherein the collimator includes at least two supporting elements, interconnected in such a way that the collimator includes a device including slots between the supporting elements, each one slot being provided for holding a collimator plate. 3. The collimator as claimed in claim 2, wherein the collimator includes two devices with slots between the supporting elements for holding collimator plates, in which one device serves as a base element and the other device serves as a cover element. 4. The collimator as claimed in claim 2, wherein the slots are configured in such a way that, in the event of arrangement over a beam detector, the collimator plates arranged in the slots are aligned at least substantially with a focus of a radiation source assigned to the beam detector. 5. The collimator as claimed in claim 1, wherein the supporting elements are designed as supporting crosses. 6. The collimator as claimed in claim 1, wherein the supporting elements are of at least one of U-, V- and W-shaped design. 7. The collimator as claimed in claim 1, wherein the supporting elements include at least substantially the same wall thickness. 8. The collimator as claimed in claim 1, wherein the supporting elements are made from a glass fiber reinforced liquid crystal polymer. 9. The collimator as claimed in claim 2, wherein the device having slots is an injection-molded part. 10. The collimator as claimed in claim 2, wherein the device having slots includes a support strut at least one of on the edge side and arranged between two supporting elements. 11. The collimator as claimed in claim 1, wherein the supporting elements are bonded to the collimator plates. 12. The collimator as claimed in claim 11, wherein the adhesive is a low-viscosity adhesive. 13. The collimator as claimed in claim 3, wherein the base element includes at least one positioning lug for the purpose of positionally accurate arrangement over a beam detector. 14. The collimator as claimed in claim 1, wherein the collimator plates include at least one of tungsten, molybdenum and tantalum. 15. An X-ray detector, comprising the collimator as claimed in claim 1. 16. The collimator as claimed in claim 1, wherein the collimator is alignable on all sides next to collimators of identical design. 17. A computed tomography unit comprising a collimator as claimed in claim 1. 18. The collimator as claimed in claim 3, wherein the slots are configured in such a way that, in the event of arrangement over a beam detector, the collimator plates arranged in the slots are aligned at least substantially with a focus of a radiation source assigned to the beam detector. 19. An X-ray detector, comprising the collimator as claimed in claim 2. 20. A computed tomography unit, comprising a plurality of collimators as claimed in claim 1, each aligned on all sides next to collimators of identical design.