TITLE:
Research on Phase Detection of Liquid Crystal Optical Device
AUTHORS:
Mingliang Shi, Ruofu Yang, Chunping Yang, Mingwu Ao, Hongzhou Dong
KEYWORDS:
Liquid Crystal Optical Device, Modulation Phase Detection, Orthogonal Phase Shifting, Conjugate Interference, Phase Retrieval Algorithm
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.2 No.12,
November
25,
2014
ABSTRACT: The technology for phase detection of
liquid crystal optical device is a difficult research in current domestic and
overseas. However, for the existing liquid crystal optical device, aiming at
the poor anti-vibration capability and poor versatile of phase detection, the
complexity of phase retrieval algorithm, we propose a new phase measurement
principle and experimental methods of liquid crystal optical device. It is a
phase measurement method based on the combination of phase- shifting interferometer
and phase conjugation technology. The deflection characteristics of the liquid
crystal device means the device can implement phase modulation to only one
direction of polarized light while is completely transparent to orthogonal
polarized light. We put forward the phase shift of the orthogonal polarization
phase shift interferometer method, using phase shifting interference as well as
the combination of phase conjugate means to achieve its phase measurement. So
we can retrieves devices modulation phase simply and efficiently combines with
phase- shifting interferometer technology.