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