• Acta Optica Sinica
  • Vol. 3, Issue 3, 265 (1983)
JIN GUANCHANG, ZHANG WEIBAO, and LIU CHUNYANG
Author Affiliations
  • [in Chinese]
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    JIN GUANCHANG, ZHANG WEIBAO, LIU CHUNYANG. Sandwich speckle photography[J]. Acta Optica Sinica, 1983, 3(3): 265 Copy Citation Text show less

    Abstract

    A new speckle photography method-sandwich speckle photography is proposed. The paper describes the simple principle of this method and it s advantages. Similar to tne sandwich holograhy, it makes up of two pieces of single exposure specklegram. We made each single exposure photograph at various situations, then put two of them together and precisely replaced them. The quality of fringe obtained by sandwich specklegram is quite the same as that obtained by common double exposure speckle. gram. If we make n pieces of single exposure specklegram n(n—1)/2 pairs of double exposure specklegram will be obtained. It is well-known that the double exposure specklegram is very difficult to make at temporal processes and dynamical deformation. High speed photography combined with sandwich speckle photography can overcome this difficulty. Finally an experimental evidence is identical with the result of double exposure. Doubtlessly, the sandwich speckle photography will pavo the way for the application of speckle intexferometry.