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Sampling of the path difference in asymmetric white-light interferometry by means of ultraviolet HeCd-laser radiation

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2 Author(s)
Hohm, Uwe ; Institut für Physikalische und Theoretische Chemie der Technischen, Universität Braunschweig, D-38106 Braunschweig, Germany ; Loose, Achim

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HeCd-laser radiation at a vacuum wavelength of 325.13 nm is used for sampling the path difference between the two arms of a Michelson interferometer. This allows for a simpler and more effective determination of the wavelength dependence of the refractive index n(λ) of gases in the visible and near ultraviolet by means of asymmetric white-light interferometry. Examples of n(λ) are given for gaseous P4 and I2 in the visible wavelength range. © 2000 American Institute of Physics.

Published in:

Review of Scientific Instruments  (Volume:71 ,  Issue: 4 )