Patent ID: 7822177
Filing Date: 2010-10-26
Classification: G01N

Abstract:
1. A method of back-reflection X-ray diffraction of a specimen, comprising: setting an approximate pre-selected X-ray detector to specimen distance (hereafter called “film-to-specimen distance”); subjecting the specimen to X-rays; recording a back-reflected Laue diffraction pattern; calculating Miller indices of a predetermined fraction of spots in the resulting pattern; averaging the Miller indices of the fraction of spots; moving a virtual representation of the specimen by a predetermined small amount along a line connecting the film to the specimen, changing the film-to-specimen distance; repeating the calculation, averaging and moving in small angular steps until the virtual representation of the specimen has been moved through a predetermined small distance range and best fits to the observed data; and determining the optimum film-to-specimen distance resulting in the smallest average Miller index.