Simultaneous phase-shifting dual-wavelength interferometry based on two-step demodulation algorithm.
作者： Wangping Zhang , Xiaoxu Lu , Leihuan Fei , Hui Zhao , Hanling Wang
DOI: 10.1364/OL.39.005375
关键词:
摘要: A simultaneous phase-shifting dual-wavelength interferometry based on two-step demodulation algorithm is proposed in this Letter. First, two lasers with different wavelengths go through the same inline interference system simultaneously, and a sequence of five frames interferograms (SPSDWIs) special phase shifts are captured by monochrome CCD. Subsequently, using subtraction between first SPSDWI other SPSDWI, each wavelength single-wavelength images (SWIIs) without background can be achieved. Finally, algorithm, wrapped determined easily quickly high accuracy.
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