METHOD FOR OBTAINING IMAGE OF OBJECT INTERNAL STRUCTURE Russian patent published in 1994 - IPC

FIELD: optics. SUBSTANCE: X-rays from source are collimated by slits and reflected from crystal-monochromator system of crystallographic planes. Asymmetry coefficient in reflecting crystal-monochromator planes must be at least 25 so that wave incident on object under study could be treated as pseudoplane wave. In this case divergence of wave incident on object under study will be = 5 times lower than wobbling curve width of selected reflection and leading edge of beam formed by slits will widen b times. Beams passed through object under study without dissipation and those which have suffered microdissipation at interface of two or more media with different X-ray refraction indices, while propagating in crystal analyzer mounted in reflective position, interact and create interference image of object. Result is recorded by detector. Image is analyzed at different stationary angular positions of crystal analyzer within reflection curve and beyond it. Algebraic addition of images obtained at crystal analyzer positions corresponding to equal angles of deflection from accurate Bragg angle on both slopes of reflection curve enable more clear detection of boundary of media with different refraction indices. Simultaneous recording of images in passed and diffracted beams followed by their algebraic addition serves same purpose. EFFECT: improved detection of interface between media with different refraction indices. 5 cl, 3 dwg