75332329
Jul 29, 1997
Sep 14, 1999
Instrumentation, namely, homodyne interferometers with photorefractive detection capability, and systems comprised of pulsed lasers to generate ultrasound in the part being tested, probe lasers to illuminate the surface for detection, a laser ultrasonic receiver to detect surface displacement, a workpiece automation unit, signal processing software and date presentation software, all for laser-based ultrasound nondestructive testing for the purpose of quality control and inspection of materials and structures during their use or manufacture
Electrical and Scientific Apparatus