Weimann, ClaudiusClaudiusWeimannFratz, MarkusMarkusFratzWölfelschneider, HaraldHaraldWölfelschneiderFreude, WolfgangWolfgangFreudeHöfler, HeinrichHeinrichHöflerKoos, ChristianChristianKoos2022-03-052022-03-052015https://publica.fraunhofer.de/handle/publica/24092610.1364/AO.54.0063342-s2.0-84942373438We improve the accuracy of distance measurements with synthetic-wavelength interferometry by referencing the spectral spacing of the free-running light sources to a high-precision radio-frequency oscillator. In addition, we increase the unambiguity range with a time-of-flight technique. Distances to scattering technical surfaces can be measured with micrometer accuracy and an unambiguity range of 1.17 m. The measurement rate amounts to 300 Hz.eninterferometryremote sensinglaser range finder535journal article