Expanding the capability of photo induced-emf arrays [nondestructive testing]

Summary form only given. We present architectures and simulations of a new form of laser based ultrasonic receiver arrays which are suitable for non-contacting, in situ, nondestructive evaluation. These receiver arrays are capable of high spatial resolution by employing synthetic acoustic imaging lenses formed by opto-electronic techniques and signal post-processing. The arrays capitalize on the advantages inherent in photo induced-emf sensors, specifically the simplicity, robust operation and reduced fabrication cost. The arrays could be manufactured on monolithic semiconductor structures, which would include the detector, amplifiers and post processing modules. Furthermore the arrays could easily be mass produced at relatively low cost by capitalizing on the processing and packing techniques developed for the microelectronics industry.