Phase-shifting lateral shearing interferometer with two pairs of wedge plates |
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| Authors: | Lee Hyun-Ho You Jang-Hoon Park Seung-Han |
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| Institution: | National Research Laboratory of Nonlinear Optics, College of Science, Yonsei University, Seoul 120-749, Korea. |
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| Abstract: | We present a compact and robust phase-shifting lateral shearing interferometer that produces shearing fringes in orthogonal directions without any mechanical rotation or precise alignment. It consists of two pairs of wedge plates, a beam splitter, and a single CCD camera. Both phase-shifting and tilt for lateral shearing are achieved with two pairs of wedge plates, which can reduce systematic errors caused by external vibration and atmospheric disturbance. |
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