Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Synthetic-wavelength interferometry improved with frequency calibration and unambiguity range extension

: Weimann, Claudius; Fratz, Markus; Wölfelschneider, Harald; Freude, Wolfgang; Höfler, Heinrich; Koos, Christian


Applied optics 54 (2015), Nr.20, S.6334-6343
ISSN: 0003-6935
ISSN: 1539-4522
ISSN: 1559-128X
Fraunhofer IPM ()
interferometry; remote sensing; laser range finder

We 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.