OPTICAL FILTER FOR A QUASI-MONOCHROMATIC X-RAY AND MULTI-ENERGY X-RAY IMAGING SYSTEM WITH THE QUASI-MONOCHROMATIC X-RAY

摘要

A quasi-monochromatic x-ray optical filter according to the present invention is a device for filtering a polychromatic x-ray to obtain a quasi-monochromatic x-ray having a specific energy band. The quasi-monochromatic x-ray optical filter includes a plurality of reflecting mirrors on which respective multi-layer films for selectively reflecting x-rays based on Bragg's law are deposited, a reflecting mirror chamber for fastening the reflecting mirrors in a specific geometrical arrangement, and an alignment mechanism for aligning the chamber in a commercial x-ray generation device. Since a quasi-monochromatic x-ray multi-energy imaging system using the optical filter can clearly distinguish the spectrum regions of multi-energy from each other using a quasi-monochromatic x-ray having multi-energy, clear images can be acquired even after a small exposure in the case where adjustment is performed to use an optimal energy value.