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This paper presents a simple reversed lateral shearing interferometer system for symmetric lens measurement. Reversed lateral shearing are recorded by tilting a singlecube beam splitter, which introduced the spatial carrier frequency. Fourier method is applied to evaluate the phase of symmetric object, which is separated on the frequency domain after Fourier transform. This system can generate shearing graph by using a single image. The effects of shearing distance, the choice of algorithm and comparison result are discussed in detail. The theory and the application are presented.

Novel and simple reversed lateral shear interferometer with single-cube beam splitter and spatial Fourier transform for symmetric lens measurement