Phase detection from two phase-shifting interferograms

Yongjian Zhu; Liren Liu; Yanan Zhi; Zhu Luan; De'an Liu

doi:10.1117/12.731957

14 September 2007 Phase detection from two phase-shifting interferograms

Yongjian Zhu, Liren Liu, Yanan Zhi, Zhu Luan, De'an Liu

Proceedings Volume 6671, Optical Manufacturing and Testing VII; 66711D (2007) https://doi.org/10.1117/12.731957
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

Phase detection is one of the most important processing steps in optical phase-shifting interferometry. It aims to reconstruct the phase field of wavefront from the interferogram. To solve this problem, many algorithms of phase detection have been proposed these years. Here, A FFT-based two-step phase shifting (TPS) algorithm is described in detail and implemented by use of experimental interferograms. This algorithm has been proposed to solve the TPS problem with random phase shift except π. By comparison with the Visibility-Function-based TPS algorithm, it proves that the FFT-based algorithm has obvious advantages in phase extracting. Meanwhile, we present a π-phase-shift supplement to the TPS algorithm, which combines the two interferograms and demodulates the phase map from a combined interferogram. So combining this quasi-two-step method and FFT-based one, one could really implement the TPS with random phase shift. Thereafter, we design an optical setup of two-channel TPS interferometer with random phase shift, which could capture the two interferograms simultaneously. At the same time, we propose a fringe-variable Jamin interferometer to detect reversed domain of ferroelectric crystal in real time. It could realize the two-step phase shifting with π radian.

Citation Download Citation

Yongjian Zhu, Liren Liu, Yanan Zhi, Zhu Luan, and De'an Liu "Phase detection from two phase-shifting interferograms", Proc. SPIE 6671, Optical Manufacturing and Testing VII, 66711D (14 September 2007); https://doi.org/10.1117/12.731957

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available