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Authors: Dalhoff, Ernst
Fischer, Edgar
Kreuz, Silke
Tiziani, Hans J.
Title: Double heterodyne interferometry for high precision distance measurements
Issue Date: 1993 Konferenzbeitrag Grün, Armin (Hrsg.): Papers presented to the conference : organized at Zurich, Switzerland, Oktober 4-7, 1993. Karlsruhe : Wichmann, 1993 (Optical 3 D measurement techniques 2). - ISBN 3-87907-254-X, S. 379-385
Abstract: We present a double-heterodyne interferometer for absolute distance measurements at rough surfaces up to 100 metres. The two wavelengths are generated by frequency shifting the light of a monomode laser diode using a 500 MHz acoustooptic modulator. The synthetic wavelength obtained is λ = 60 cm. In order to yield unambiguity up to 100 meter distance two measurements have to be taken using slightly different frequency shifts of 500 resp. 501.5 MHz. Measurements showing a resolution of 0.1 mm are presented.
Appears in Collections:07 Fakultät Konstruktions-, Produktions- und Fahrzeugtechnik

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