Abstract
A nonincremental interferometer for the absolute measurement of distances
is presented. The measuring technique is based on both dispersive white-light
(DWL) interferometry and frequency-modulated continuous-wave (FMCW) interferometry.
The proposed configuration integrates both techniques in the same interferometer
by use of a single laser diode. This solution enables the results from the
coarse measurements from the FMCW interferometer to be combined with the fine
readouts from the DWL interferometer. Preliminary experimental results confirm
the capability of the system to combine the advantages of the two techniques.
© 1997 Optical Society of America
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