title: Parallel two-step spatial carrier phase-shifting common-path interferometer with a Ronchi grating outside the Fourier plane.
abstract: 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.
authors: College of Information and Communication Engineering, Harbin Engineering University, Harbin, Heilongjiang 150001, China.
authors: Mingguang
authors: M
authors: Shan
authors: Bengong
authors: B
authors: Hao
authors: Zhi
authors: Z
authors: Zhong
authors: Ming
authors: M
authors: Diao
authors: Yabin
authors: Y
authors: Zhang
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007368:Interferometry / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*