METHOD FOR NON-DESTRUCTIVE HOLOGRAPHIC CONTROL OF MULTI-LAYER CONSTRUCTIONS

摘要

Method for non-destructive holographic control of multi-layer constructions includes registration by method of two expositions of holographic interferential portrait of construction at loading it through decrease of vacuum pressure between expositions. On holographic interferential portrait of construction one finds set of closed interference bands with increased density by which one determines placement and boundary of stratification. By boundary of stratification on holographic interferential portrait one determines shape and dimension of stratification. Besides that on holographic interferential portrait one determines number of interferential bands within stratification. Through calculations one plots graph of dependence of number of interferential bands on depth of bedding of stratification for construction with stratification with defined shape and dimensions at given value of decrease of vacuum pressure. Bu graph one determines depth of bedding of stratification.