A Demodulation Method of Spatial Domain for Low-Coherence Interferometry With High Accuracy and Adaptability

Chao Wang,Xuezhi Zhang,Junfeng Jiang,Kun Liu,Shuang Wang,Yuanyao Li,Tiegen Liu

IEEE Photonics Journal（2020）

引用 1|浏览20

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摘要

A demodulation method of spatial domain based on low-coherence interferometry is proposed. The original signal of spatial domain acquired by linear CCD is filtered with all-phase filter to obtain the fringe pattern, and the phase signal of the spatial frequency domain is retained after filtering. The fringe pattern analysis is employed to avoid phase ambiguity and realize large measurement range i...

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关键词

Demodulation,Cavity resonators,Sensors,Filtering theory,Calibration,Charge coupled devices

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