Experimental Aspects of Using Time-Averaged Holographic Interferometry to Detect Barely Visible Impact Damage in a Graphite/Epoxy Composite Plate

摘要

Time-averaged holographic interferometry has been used to detect barely visible impact damage in a graphite/epoxy plate. Details are given of both the experimental and theoretical aspects of time-averaged holographic interferometry, including temporal modulation of the laser light. Double exposure holographic interferometry has also been used to detect barely visible impact damage.