Interferometry beyond the coherence length of the light source: the use of channelled spectral lines
- 1 July 1981
- journal article
- Published by IOP Publishing in Journal of Optics
- Vol. 12 (4) , 229-232
- https://doi.org/10.1088/0150-536x/12/4/001
Abstract
Shows that the coherence length is the frontier which separates the ranges of observation of interference fringes and of spectral channels. Thus the latter are produced by the interference of wavetrains separated by an optical path difference larger than their coherence length. The use of channels for the measurement of very large distances should increase significantly the relative precision and the range of application of interferometric metrology.Keywords
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