Zhao Dexin, Luo Qingchang. Double annular aperture method for laser speckle interference photography[J]. Chinese Journal of Lasers, 1984, 11(3): 176
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A double annular aperture method is put forward with which the authors recorded the processes of laser speckle photography. The distribution of light intensity in the diffracted halo of the picture of laser speckle are calculated and the pictures of Young’s fringes with higher quality are given.