Zhao Yeying. White light laser speckles and their application to interior strain measurements[J]. Chinese Journal of Lasers, 1982, 9(12): 773
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Speckles generated by a white light laser are different from those by conventional monochromatic lasers. It is pointed out that the white light laser has its advantages when speckle technique is used. By measuring the displacement of a transparent object doped with scattering particles, we can observe not only the distinct interference pattern of speckles, but also make a quantitative analysis on the deformation of each section within the three dimensional transparent objects.