Absolute distance measurement with correction of air refractive index by using two-color dispersive interferometry Article Swipe

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Hanzhong Wu , Fumin Zhang , Tingyang Liu , Jianshuang Li , Xinghua Qu ·

YOU? · · 2016 · Open Access · · DOI: https://doi.org/10.1364/oe.24.024361

Two-color interferometry is powerful for the correction of the air refractive index especially in the turbulent air over long distance, since the empirical equations could introduce considerable measurement uncertainty if the environmental parameters cannot be measured with sufficient precision. In this paper, we demonstrate a method for absolute distance measurement with high-accuracy correction of air refractive index using two-color dispersive interferometry. The distances corresponding to the two wavelengths can be measured via the spectrograms captured by a CCD camera pair in real time. In the long-term experiment of the correction of air refractive index, the experimental results show a standard deviation of 3.3 × 10^-8 for 12-h continuous measurement without the precise knowledge of the environmental conditions, while the variation of the air refractive index is about 2 × 10^-6. In the case of absolute distance measurement, the comparison with the fringe counting interferometer shows an agreement within 2.5 μm in 12 m range.

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$Refractive Index$

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Optics Interferometry Refractive index Physics Standard deviation Observational error Measurement uncertainty Wavelength Range (aeronautics) Materials science Mathematics Statistics Composite material Quantum mechanics

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Type: article
Language: en
Landing Page: https://doi.org/10.1364/oe.24.024361
OA Status: gold
Cited By: 34
References: 44
Related Works: 10
OpenAlex ID: https://openalex.org/W2531135247

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DOI: https://doi.org/10.1364/oe.24.024361

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Title: Absolute distance measurement with correction of air refractive index by using two-color dispersive interferometry

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Language: en

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Publication year: 2016

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Publication date: 2016-10-12

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Authors: Hanzhong Wu, Fumin Zhang, Tingyang Liu, Jianshuang Li, Xinghua Qu

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Landing page: https://doi.org/10.1364/oe.24.024361

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Concepts: Optics, Interferometry, Refractive index, Physics, Standard deviation, Observational error, Measurement uncertainty, Wavelength, Range (aeronautics), Materials science, Mathematics, Statistics, Composite material, Quantum mechanics

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Cited by: 34

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