Laser ultrasonics is a non-contact, non-destructive technique for performing ultrasonic evaluation on components and structures in environments where conventional transducer-based techniques are not an option. Laser ultrasonics can acquire data on parts at high temperature (1100°C) and moving at high speed (5 m/s). Its high bandwidth (100 MHz) gives it accurate measurement of depth and thickness. The small size of the laser spots on the target (100 µm) enables it to interrogate curved surfaces and confined spaces. Scanning of the optical beams enables it to inspect surface areas rapidly. All types of materials, including ceramics, metals, glass, semiconductors and composites can be evaluated.
Laser ultrasonics has broad applications for in-line process monitoring, post-process evaluation, and in-service inspection. In-line monitoring early in the production process allows feedback control of the process.
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