Patent Number: 
Section: claims

1. A monochromator for use with an X-ray radiator that emits X-rays having a spectral composition, said X-ray radiator having an operating voltage associated therewith, said monochromator comprising:a crystal having a property of spectrally restricting X-rays interacting therewith to a spectral range having a spectral composition, said spectral range encompassing multiple energies and exceeding a spectral range provided by Bragg's relation from single crystal lattice;a positioning device connected to said crystal to move said crystal relative to the X-rays emitted by said X-ray radiator to change said spectral composition of the X-rays; anda control device connected to said positioning device for automatically controlling said positioning device to control movement of said crystal dependent on said operating voltage. 2. A monochromator as claimed in claim 1 wherein said positioning device moves said crystal to alter an angle between at least a portion of said X-rays and said crystal. 3. A monochromator as claimed in claim 1 wherein said positioning device moves said crystal into and out of a path of said X-rays. 4. A monochromator as claimed in claim 1 wherein said spectral range comprises a restricted range energy spectrum with a maximum value, and wherein said control device sets said maximum value and controls said positioning device dependent on the maximum value that has been set. 5. A monochromator as claimed in claim 1 wherein said X-rays emitted by said X-ray radiator have an emitted energy spectrum with a first maximum value, and wherein said crystal spectrally restricts said X-rays emitted by said X-ray radiator to produce spectrally restricted energy spectrum with a second maximum value, and wherein said control device sets a factor between said first maximum value and said second maximum value and controls said positioning device dependent on said factor that has been set. 6. A monochromator as claimed in claim 5 wherein said control device sets said factor in a range between 0.3 and 0.8. 7. An X-ray device comprising: an X-ray radiator that emits X-rays having a spectral composition, said X-ray radiator having an operating voltage associated therewith; anda monochromator comprising a crystal having a property of spectrally restricting X-rays interacting therewith to a spectral range having a spectral composition, said spectral range encompassing multiple energies and exceeding a spectral range provided by Bragg's relation from single crystal lattice, a positioning device connected to said crystal to move said crystal relative to the X-rays emitted by said X-ray radiator to change said spectral composition of the X-rays, and a control device connected to said positioning device for automatically controlling said positioning device to control movement of said crystal dependent on said operating voltage. 8. An X-ray device as claimed in claim 7 wherein said positioning device moves said crystal to alter an angle between at least a portion of said X-rays and said crystal. 9. An X-ray device as claimed in claim 7 wherein said positioning device moves said crystal into and out of a path of said X-rays. 10. An X-ray device as claimed in claim 7 wherein said spectral range comprises a restricted range energy spectrum with a maximum value, and wherein said control device sets said maximum value and controls said positioning device dependent on the maximum value that has been set. 11. An X-ray device as claimed in claim 10 wherein said X-rays emitted by said X-ray radiator have an emitted energy spectrum with a first maximum value, and wherein said crystal spectrally restricts said X-rays emitted by said X-ray radiator to produce spectrally restricted X-rays having an energy spectrum with a second maximum value, and wherein said control device allows setting of a factor between said first maximum value and said second maximum value and controls said positioning device dependent on said factor that has been set. 12. An X-ray device as claimed in claim 11 wherein said control device sets said factor in a range between 0.3 and 0.8.