Patent Number: 
Section: claims

1. A beam admission unit, comprising:a plurality of admission segments aligned adjacent to one another to form an admission plate chain, interconnected in an articulated fashion and respectively including at least one admission slit to admit radiation emanating from a radiation source onto an admission region: whereinthe admission slits of at least two admission segments have mutually differing average admission widths. 2. A beam generation device, comprising:a radiation source to generate radiation, the radiation source having an exit window through which the radiation exits with a maximally expanded beam cone during operation; anda beam admission unit including a plurality of admission segments aligned adjacent to one another to form an admission plate chain, interconnected in an articulated fashion and respectively including at least one admission slit to admit radiation emanating from the radiation source onto an admission region: whereinthe beam admission unit is arranged downstream of the exit window of the radiation source in an emission direction of the radiation such that the at least one admission slit restricts the maximally expanded beam cone of radiation into a single, smaller cone of radiation. 3. The beam generation device as claimed in claim 2, wherein an articulated connection, formed between a first and a second admission segment which is adjacent to the first in the longitudinal direction of the admission plate chain, is designed as a hinge joint. 4. The beam generation device as claimed in claim 2, wherein an articulated connection, formed between a first and a second admission segment which is adjacent to the first in the longitudinal direction of the admission plate chain, is designed as a ball and socket joint. 5. The beam generation device as claimed in claim 2, wherein the admission segments have a substantially equal width in the longitudinal direction of the admission plate chain. 6. The beam generation device as claimed in claim 2, wherein the admission slits are arranged centrally in the admission segments with respect to the longitudinal direction of the admission plate chain. 7. The beam generation device as claimed in claim 2, wherein the admission slits are tapered toward their center with respect to their longitudinal direction. 8. The beam generation device as claimed in claim 2, wherein the admission segments are produced from a radiation absorbing material. 9. The beam generation device as claimed in claim 8, wherein the radiation absorbing material is tantalum or tungsten. 10. The beam generation device as claimed 2, wherein the beam admission unit further comprises:at least one cylinder roll receptacle, mounted to rotate and connected to a first end of the admission plate chain, for rolling up or unrolling the admission plate chain. 11. The beam generation device as claimed in claim 10, wherein the beam admission unit further comprises:a further cylinder roll receptacle, mounted to rotate and connected to a second end of the admission plate chain, for unrolling or rolling up the admission plate chain. 12. The beam generation device as claimed in claim 11, further comprising:a guide unit to guide the admission segments in the longitudinal direction of the admission plate chain along a guide path prescribed by the guide unit. 13. The beam generation device as claimed in claim 12, wherein the guide unit includes at least one guide rail for guiding the admission segments on a guide path fixed by the guide rail between the cylinder roll receptacle and the further cylinder roll receptacle. 14. The beam generation device as claimed in claim 11, wherein at least one of the cylinder roll receptacle and the further cylinder roll receptacle includes a drive unit for rotating at least one of the cylinder roll receptacle and the further cylinder roll receptacle. 15. The beam generation device as claimed in claim 14, wherein the drive unit comprises a stepper motor to actuate at least one of the cylinder roll receptacle and the further cylinder roll receptacle directly or by way of a transmission unit. 16. The beam generation device as claimed in claim 2, wherein the at least one admission slit is useable to admit at least one of x-ray and gamma radiation. 17. The beam generation device as claimed in claim 2, wherein the radiation source is an x-ray or gamma radiation source. 18. The beam generation device of claim 2, wherein the admission slits of at least two admission segments have mutually differing average admission widths. 19. A tomography device, comprising:a radiation source to generate radiation, the radiation source having an exit window through which the radiation exits with a maximally expanded beam cone during operation;a radiation detector, arranged opposite the radiation source in an emission direction of the radiation; anda beam admission unit including a plurality of admission segments aligned adjacent to one another to form an admission plate chain, interconnected in an articulated fashion and respectively including at least one admission slit to admit radiation emanating from the radiation source onto the admission region; whereinthe beam admission unit is arranged downstream of the exit window of the radiation source in an emission direction to admit the radiation onto an admission region on the radiation detector, andthe at least one admission slit restricts the maximally expanded beam cone of radiation into a single, smaller cone of radiation. 20. The tomography device as claimed in claim 19, wherein the tomography device is an x-ray computed tomography device. 21. The tomography device as claimed in claim 19, wherein the radiation source is an x-ray or gamma radiation source. 22. The tomography device of claim 19, wherein an articulated connection, formed between a first and a second admission segment which is adjacent to the first in the longitudinal direction of the admission plate chain, is designed as one of a hinge joint and a ball and socket joint and. 23. The beam tomography device as claimed in claim 19, wherein the admission segments have a substantially equal width in the longitudinal direction of the admission plate chain. 24. The tomography device of claim 19, wherein the admission slits of at least two admission segments have mutually differing average admission widths. 25. The tomography device of claim 19, wherein the admission slits are arranged centrally in the admission segments with respect to the longitudinal direction of the admission plate chain. 26. The tomography device of claim 19, wherein the admission slits are tapered toward their center with respect to their longitudinal direction. 27. The tomography device of claim 19, wherein the admission segments are produced from a radiation absorbing material, in particular tantalum or tungsten. 28. The tomography device of claim 19, further comprising:at least one cylinder roll receptacle, mounted to rotate and connected to a first end of the admission plate chain, for rolling up or unrolling the admission plate chain. 29. The tomography device of claim 28, further comprising:a further cylinder roll receptacle, mounted to rotate and connected to a second end of the admission plate chain, for unrolling or rolling up the admission plate chain. 30. The tomography device of claim 29, further comprising:a guide unit to guide the admission segments in the longitudinal direction of the admission plate chain along a guide path prescribed by the guide unit. 31. The tomography device of claim 30, wherein the guide unit includes at least one guide rail for guiding the admission segments on a guide path fixed by the guide rail between the cylinder roll receptacle and the further cylinder roll receptacle. 32. The tomography device of claim 29, wherein at least one of the cylinder roll receptacle and the further cylinder roll receptacle includes a drive unit for rotating at least one of the cylinder roll receptacle and the further cylinder roll receptacle. 33. The tomography device of claim 32, wherein the drive unit comprises a stepper motor to actuate at least one of the cylinder roll receptacle and the further cylinder roll receptacle directly or by way of a transmission unit.