Patent ID: 7443959

Claim:
An arrangement for collimating a beam of incident X-rays in an X-ray fluorescence analyzer device, comprising: a collimator plate with a plurality of pores that penetrate through at least an essential part of the thickness of the collimator plate and that have a diameter smaller than 100 micrometers, and an annular plate comprising material essentially opaque to X-rays, said annular plate defining an area transparent to X-rays; wherein said collimator plate and said annular plate are adapted to be placed in said X-ray fluorescence analyzer device between an X-ray source and a sample, and wherein said plurality of pores in said collimator plate are adapted to let through at least a part of X-rays radiated by said X-ray source, and wherein edges of said area transparent to X-rays in said annular plate are adapted to spatially limit in a transverse direction a beam of X-rays radiated by said X-ray source, and wherein walls of at least some of said pores comprise a coating, the material of the coating being one of: iridium, ruthenium, osmium, platinum, gold.