Patent Number: 
Section: claims

1. An x-ray beam conditioning system comprising:a sequential optic includinga first diffractive element, anda second diffractive element,at least one diffractive element of the first and second diffractive elements being a crystal, andat least one diffractive element of the first and second diffractive elements having curved diffracting planes with at least one focus point. 2. The x-ray beam conditioning system of claim 1 wherein both diffractive elements are mosaic crystals with high mosaicity end low d-spacing. 3. The x-ray beam directing system of claim 1 wherein the crystal is selected from the group consisting of a perfect crystal and a mosaic crystal and has a low d-spacing. 4. The x-ray beam conditioning system of claim 3 wherein the other diffractive element is a multilayer optic. 5. The x-ray beam conditioning system of claim 3 wherein the other diffractive element is a mosaic crystal with large d-spacing. 6. The x-ray beam conditioning system of claim 1 wherein the diffractive element is a multilayer optic selected from the group consisting of an elliptical mirror and a parabolic mirror and has graded d-spacing. 7. The x-ray beam conditioning system of claim 6 wherein the graded d-spacing is lateral grading. 8. The x-ray beam conditioning system of claim 6 wherein the graded d-spacing is depth grading. 9. The x-ray beam conditioning system of claim 6 wherein the graded d-spacing is lateral grading and depth grading. 10. The x-ray beam conditioning system 1 wherein at least one diffractive element is an asymmetric Johansson crystal. 11. The x-ray beam conditioning system of claim 1 wherein at least one diffractive element is a Johansson crystal, a Johann crystal, or a logarithm crystal. 12. The x-ray beam conditioning system 1 wherein at least one diffractive element is a crystal with low d-spacing for use in a plane where high convergence is provided. 13. The x-ray beam conditioning system of claim 1 further comprising at least two working corners.