Chen Tuming, Feng Daren, Zou Haixing. Two dimensional lateral shearing interferometer[J]. Chinese Journal of Lasers, 1980, 7(10): 38
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A single shearing interferogram is not sufficient to describe a wavefront. Two interferograms sheared in orthogonal directions must be used to reconstruct the wavefront of any arbitrary shape. Two types of two dimensional lateral shearing interferometers have been studied: orthogonal shearing prism and crossed grating. A method is described that uses data obtained from the interferograms to reconstruct the wavefront. It was used in processing the interferograms obtained in our experiment.