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Proceedings Paper

Realization of the optimum performance from length-measuring interferometers by atmospheric refractometry
Author(s): Michael J. Downs
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Paper Abstract

When optical techniques are applied to high precision length measurement in the free atmosphere, it is essential to correct the wavelength of the radiation for the refractive index of the air. The two most widely employed techniques for determining the refractive index of the air ar the calculation of a value using the Elden equation from the measurements of atmospheric parameters and direct measurement using a refractometer.

Paper Details

Date Published: 30 September 1998
PDF: 8 pages
Proc. SPIE 3477, Recent Developments in Optical Gauge Block Metrology, (30 September 1998); doi: 10.1117/12.323123
Show Author Affiliations
Michael J. Downs, National Physical Lab. (United Kingdom)


Published in SPIE Proceedings Vol. 3477:
Recent Developments in Optical Gauge Block Metrology
Jennifer E. Decker; Nicholas Brown, Editor(s)

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