Open AccessParallel two-step spatial carrier phase-shifting common-path interferometer with a Ronchi grating outside the Fourier plane
Author(s) -
Mingguang Shan,
Bengong Hao,
Zhi Zhong,
Ming Diao,
Yabin Zhang
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.002126
Subject(s) - interferometry , optics , fourier transform , phase (matter) , grating , spatial frequency , plane (geometry) , optical path length , diffraction grating , physics , mathematics , geometry , quantum mechanics
A parallel two-step spatial carrier phase-shifting common-path interferometer with a Ronchi grating placed outside the Fourier plane is proposed in this paper for quantitative phase imaging. Two phase-shifted interferograms with spatial carrier can be captured simultaneously using the proposed interferometer. The dc term can be eliminated by subtracting the two phase-shifted interferograms, and the phase of a specimen can be reconstructed through Fourier transform. The validity and stability of the interferometer proposed are experimentally demonstrated via the measurement of a phase plate.