The capabilities of Ford USA’s CAH system for stepped phase interferometry are presented. Holographic test equipment and facilities are briefly reviewed. Fringe analysis algorithms and procedures for practical semiautomated processing of stepped phase interferograms of complex real life structures for quantitative measurement of deformation and shape are discussed. Several automotive applications illustrating the fringe analysis technique are presented.
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Gordon M. Brown, "Computer-aided holometry in the automotive industry," Proc. SPIE 10268, Optical Inspection and Testing: A Critical Review, 1026803 (1 June 1993);