Precision measurement of refractive index of air based on laser synthetic wavelength interferometry with Edlén equation estimation.
作者： Liping Yan , Benyong Chen , Enzheng Zhang , Shihua Zhang , Ye Yang
DOI: 10.1063/1.4928159
关键词:
摘要: A novel method for the precision measurement of refractive index air (nair) based on combining laser synthetic wavelength interferometry with Edlen equation estimation is proposed. First, a nair_e calculated from modified according to environmental parameters measured by low sensors an uncertainty 10−6. Second, unique integral fringe number N corresponding nair determined nair_e. Then, fractional e high accuracy can be obtained principle subdivision interferometry. Finally, accurate achieved fringes and e. The merit proposed that it not only solves problem being limited accuracies sensors, but also avoids adopting complicated vacuum pumping measure in of...
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