Patent Number: 062663925
Section: claims

1. A soller slit comprising a plurality of metal foils stacked with a constant interval between adjacent ones of said metal foils, said soller slit being arranged on an X-ray optical path to restrict divergence of X-rays, wherein each said metal foil being prepared by sintering a metal material such that surfaces thereof having high harmonic surface roughness.  oxide material is formed on both surfaces of each said metal foil by oxidizing said metal foil and said oxide material has high harmonic surface roughness.  said metal foils are prepared by sintering a metal material such that surfaces thereof have high harmonic surface roughness.  oxide material is formed on both surface of each said metal foil by oxidizing said metal foil and said oxide material has high harmonic surface roughness. 2. A soller slit as claimed in claim 1, wherein the surface roughness has RMS value in a range from 20 nm to 1 .mu.m, preferably from 20 to 50 nm. 3. A soller slit as claimed in claim 2, wherein said metal material is tungsten or molybdenum. 4. A soller slit as claimed in claim 1, wherein said metal material is tungsten or molybdenum. 5. A soller slit comprising a plurality of metal foils stacked with a constant interval between adjacent ones of said metal foils, said soller slit being arranged on an X-ray optical path to restrict divergence of X-rays, wherein 6. A soller slit as claimed in claim 5, wherein the surface roughness has RMS value in a range from 20 nm to 1 .mu.m, preferably from 20 nm to 50 nm. 7. A soller slit as claimed in claim 6, wherein said metal foils are formed from brass. 8. A soller slit as claimed in claim 5, wherein said metal foils are formed from brass. 9. A method for manufacturing a soller slit including a plurality of metal foils stacked with a constant interval between adjacent ones of said metal foils, said soller slit being arranged on an X-ray optical path to restrict divergence of X-rays, wherein 10. A method for manufacturing a soller slit including a plurality of metal foils stacked with a constant interval between adjacent ones of said metal foils, said soller slit being arranged on an X-ray optical path to restrict divergence of X-rays, wherein