30 September 1998 Realization of the optimum performance from length-measuring interferometers by atmospheric refractometry
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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.
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Michael J. Downs, Michael J. Downs, } "Realization of the optimum performance from length-measuring interferometers by atmospheric refractometry", Proc. SPIE 3477, Recent Developments in Optical Gauge Block Metrology, (30 September 1998); doi: 10.1117/12.323123; https://doi.org/10.1117/12.323123
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