Is the Two-Color Method Superior to Empirical Equations in Refractive Index Compensation? - Optics and Photonics Journal

OPJ > Vol.6 No.8, August 2016

Is the Two-Color Method Superior to Empirical Equations in Refractive Index Compensation? ()

HTML XML

Download as PDF (Size: 461KB) PP. 8-13

DOI: 10.4236/opj.2016.68B002 1,578 Downloads 2,368 Views Citations

Author(s)

Dong Wei^1*, Kiyoshi Takamasu², Hirokazu Matsumoto²

Affiliation(s)

¹Department of Mechanical Engineering, Nagaoka University of Technology, Nagaoka City, Japan.
²Department of Precision Engineering, The University of Tokyo, Tokyo, Japan.

ABSTRACT

The Edlén empirical equations and the two-color method are the commonly used approaches to converting a length measured in air to the corresponding length in vacuum to eliminate the influence of the refractive index of air. However, it is not well known whether the two-color method is superior to empirical equations in refractive index compensation. We investigated the uncertainties of these approaches via numerical calculations of their sensitivity coefficients of environmental parameters. On the basis of a comparison of their uncertainties, we found that in a 0% humidity environment, the two-color method had potential to provide greater measurement accuracy than the empirical equations.

KEYWORDS

Two-Color Method, Length Measurement, Sensitivity Coefficient, Uncertainty, Empirical Equations

Share and Cite:

Wei, D. , Takamasu, K. and Matsumoto, H. (2016) Is the Two-Color Method Superior to Empirical Equations in Refractive Index Compensation?. Optics and Photonics Journal, 6, 8-13. doi: 10.4236/opj.2016.68B002.

Journals Menu

Follow SCIRP

	+1 323-425-8868
	customer@scirp.org
	+86 18163351462(WhatsApp)
	1655362766

	Paper Publishing WeChat

Journals Menu

Home

About SCIRP

Service

Policies