Patent ID: 8953743
Filing Date: 2015-02-10
Classification: G01L,G01N

Abstract:
1. An X-ray stress measurement method comprising: irradiating a sample with X-rays at a plurality of different incident angles from a plurality of X-ray sources; focusing attention on a Debye-ring of each X-ray diffraction radiated conically from the sample in association with incident X-ray emitted from each of the X-ray sources; and determining stress in the sample on the basis of information of X-ray diffraction appearing at an intersection point between the Debye-ring and an equatorial plane containing an optical axis of the incident X-ray emitted from each of the X-ray sources, and information of X-ray diffraction appearing at a point on the Debye-ring other than the intersection point between the Debye-ring and the equatorial plane.