METHOD OF OPTICAL TOMOGRAPHY OF TRANSPARENT MATERIALS Russian patent published in 1997 - IPC

FIELD: optical instrument engineering, in particular, methods of testing of optical materials. SUBSTANCE: influence of the material boundary surface is eliminated, material is probed by optical radiation by colliding beams with similar aperture angles, the point of convergence of colliding beams in material volume is displaced, the receiving system detects the passing, scattered radiation and radiation reflected from defects in the material, part of probing radiation that does not pass into the material is subjected to correlation treatment jointly with passing, scattered radiation and radiation reflected from blisters and striae in the material, and the position of the point of convergence of colliding probing beams is detected. EFFECT: facilitated procedure. 1 dwg