Patent ID: 9601308
Date: 2017-03-21
CPC Classifications: G01N,G21K,H01J

Claim:
1. A spectroscopic element comprising: a first pattern for dispersing an irradiated X-ray into a first spectrum having a first plurality of intensity distributions each having a linear form; and a second pattern for generating a second spectrum different from the first pattern and having a second plurality of intensity distributions each having a linear form, for said irradiated X-ray, wherein said first and second patterns of said spectroscopic element are arranged side-by-side with respect to each other on said spectroscopic element in a direction of the linear form to cause said second plurality of intensity distributions to be disposed side-by-side in a direction orthogonal to said direction of the linear form with said first plurality of intensity distributions on an X-ray position detector in correspondence with said first and second patterns, wherein said first and second patterns of said spectroscopic element are further arranged to cause each said intensity distribution of said first plurality of intensity distributions to be disposed on the X-ray position detector collinearly head-to-tail in said direction of the linear form with a corresponding intensity distribution of said second pluality of intensity distributions, and wherein an area ratio of the first pattern to the second pattern is determined based on an X-ray, reflectance as an energy reference and an X-ray reflectance of a target to be evaluated.