We are presenting the status of an eyesafe laser radar under development at NAWCAD. It is based on a Nd:YAG pumped LiNbO3 or KTA OPO operating near 1555 nm combined with a 7.5 inch aperture receiver and an InGaAs detector. Results at ranges beyond 10 km and against various targets will be presented.
Various sensor configurations useful in the prospective detection of perturbations in both polymeric composite and metallic materials are investigated. Attention is given to (1) a cross-point coordinate axis impact-and-location sensor, and (2) a strain gage-functioning tapered sensor for stress and crack detection. Crack initiation should be detectable if it occurs perpendicular to the sensor's line-of action, in the region between contact pads.
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