Eur. Phys. J. Appl. Phys. 34, 67-70 (2006)
https://doi.org/10.1051/epjap:2006030

Dual-wavelength laser heterodyne interferometer for absolute displacement measurement

¹ National Institute of Standards, Giza, Egypt
² Helwan University, Faculty of Science, Egypt

Corresponding author: ihabix@yahoo.com

Received: 25 July 2005
Revised: 8 December 2005
Accepted: 13 December 2005
Published online: 23 March 2006

Abstract

In order to meet absolute metrology of displacement in several axes simultaneously; the induced errors due to the fluctuation of atmospheric parameters and Doppler effect should be investigated. Measurements of phase dispersion and Doppler frequency shift over two different axes using dual-wavelength laser heterodyne interferometer (ZMI-1000A) are reported. The principle of this work is to study the induced parameters influences of an absolute measurement of a displacement over two different axes in a free atmosphere using laser heterodyne interferometer.