Parallel two-step spatial carrier phase-shifting common-path interferometer with a Ronchi grating outside the Fourier plane

作者：Shan, Mingguang^*; Hao, Bengong; Zhong, Zhi; Diao, Ming; Zhang, Yabin

来源：Optics Express, 2013, 21(2): 2126-2132.

DOI：10.1364/OE.21.002126

• DIGITAL HOLOGRAPHY
• MICROSCOPY
• PAIR

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.

• 出版日期2013-1-28
• 单位哈尔滨工程大学