Simultaneous coherent imaging and strain measurement using coupled photorefractive holography and shearography

By coupling photorefractive holography with speckle shearography, it is possible to simultaneously perform
both coherent imaging and strain measurement. Use of the photorefractive effect, which is insensitive to
incoherently scattered light, is a significant advantage in coherent imaging as described. Experimental results
obtained from a centrally loaded steel plate are presented.