title: Phase-shifting lateral shearing interferometer with two pairs of wedge plates.
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.
authors.affiliation: National Research Laboratory of Nonlinear Optics, College of Science, Yonsei University, Seoul 120-749, Korea.
authors.forename: Hyun-Ho
authors.initials: HH
authors.lastname: Lee
authors.forename: Jang-Hoon
authors.initials: JH
authors.lastname: You
authors.forename: Seung-Han
authors.initials: SH
authors.lastname: Park