Patent ID: 8483977

Claim:
A method for locating defects in a target comprising the steps of: transmitting an ultrasonic signal to said target; transmitting a first laser beam to said target at a known position on said target; receiving a first reflection of said first laser beam; producing a vibration signal from said first reflection of said first laser beam responsive to vibrations produced in said target by said ultrasonic signal; transmitting a second laser beam to said target; receiving a second reflection of said second laser beam; determining an environmental vibration signal from said received second reflection; utilizing said determined environmental vibration signal to remove the effect of environmental vibrations from said produced vibration signal; producing digital images of said target at a region including the known position on the target; overlaying said digital images with said vibration signal with environmental vibrations removed to provide data points of overlaid data; utilizing a runs test for determining a probability of said overlaid data being non-random data points; selecting a threshold probability of said overlaid data being non-random data points; and indicating a potential area of concern for inspection where said overlaid data has a probability above a selected threshold of being non-random data points.