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Proceedings Paper

Long-arm two-color interferometer for measuring the change of air refractive index
Author(s): Yucong Zhu; Hirokazu Matsumoto; Tadanao Oishi
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Paper Abstract

This paper presents a two-color optical path-1ength-cdulated reversible fringe-counting interferometer system for iieasuring the change of the air refractive index. By measuring the changes of the optical path for infrared and visible light the interferoieter cancels the effect of the geoietrical distance change. This system is being tested over a 235 ii path in the tunnel at NRLM. 1.

Paper Details

Date Published: 1 July 1990
PDF: 2 pages
Proc. SPIE 1319, Optics in Complex Systems, (1 July 1990); doi: 10.1117/12.34845
Show Author Affiliations
Yucong Zhu, National Research Lab. of Metrology (Japan)
Hirokazu Matsumoto, National Research Lab. of Metrology (Japan)
Tadanao Oishi, National Research Lab. of Metrology (Japan)


Published in SPIE Proceedings Vol. 1319:
Optics in Complex Systems
F. Lanzl; H.-J. Preuss; G. Weigelt, Editor(s)

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