Share Email Print
cover

Proceedings Paper

Double heterodyne interferometry for high-precision distance measurements
Author(s): E. Dalhoff; Edgar W. Fischer; S. Heim; Hans J. Tiziani
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

We present a double-heterodyne interferometer for absolute distance measurements at rough surfaces up to 100 meters. The two wavelengths are generated by frequency shifting the light of a monomode laser diode using a 500 MHz acousto-optic modulator. The synthetic wavelength obtained is (Lambda) equals 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.

Paper Details

Date Published: 1 March 1994
PDF: 7 pages
Proc. SPIE 2252, Optical 3D Measurement Techniques II: Applications in Inspection, Quality Control, and Robotics, (1 March 1994); doi: 10.1117/12.169861
Show Author Affiliations
E. Dalhoff, Univ. Stuttgart (Germany)
Edgar W. Fischer, Univ. Stuttgart (Germany)
S. Heim, Univ. Stuttgart (Germany)
Hans J. Tiziani, Univ. Stuttgart (Germany)


Published in SPIE Proceedings Vol. 2252:
Optical 3D Measurement Techniques II: Applications in Inspection, Quality Control, and Robotics
Armin Gruen; Heribert Kahmen, Editor(s)

© SPIE. Terms of Use
Back to Top