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A Michelson twin interferometer for effective compensation for environment disturbance

A Michelson twin interferometer with a common optical system is described in this paper. As two interference signals with respect to reference and measurement beams are generated simultaneously from the common optical system, the relative variation of two interference signals in the temporal synchronization is less than 1% of the wavelength even in the experimental environment without special temperature control and vibration-proofing equipment. Here, measurements of the phase shift due to the orientation of a glass plate inserted in one path of the proposed interferometer show good agreement between the experimental and theoretical results.