| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 10, 2015
|
|
|---|---|---|
| Article Number | 15051 | |
| Number of page(s) | 5 | |
| DOI | https://doi.org/10.2971/jeos.2015.15051 | |
| Published online | 07 December 2015 | |
Regular paper
Numerical study on uncertainty of two-color method
1
Department of Mechanical Engineering, Nagaoka University of Technology, Nagaoka City, Niigata 940-2188, Japan
2
School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, People s Republic of China
* weidong@mech.nagaokaut.ac.jp
Received:
29
September
2015
Revised:
15
October
2015
The two-color method is one of the commonly used approaches for converting a length measured in air to a length in vacuum to eliminate the influence of the refractive index of air. However, the error of the technique is not well known. We investigate this uncertainty based on a generalized expression of the two-color method proposed in this paper and using numerical simulations. Numerical calculations reveal the change of the error with temperature, air pressure, and wavelengths. These characteristics can be used to optimize the two-color method.
Key words: Two-color method / length measurement / refractive index of air / uncertainty / optimization
© The Author(s) 2015. All rights reserved.
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