Title :
High accuracy velocity control method directly linked to the speed of light: application to the BNM watt balance project
Author :
Juncar, P. ; Haddad, D. ; Chassagne, L. ; Topçu, S. ; Alayli, Y.
Author_Institution :
BNM-INM, CNAM, Paris
Abstract :
We describe a novel method of velocity control that addresses the measurement requirements of the watt balance projects. The method is based on the use of both a heterodyne Michelson´s interferometer and a home-made high frequency phase shifting electronic circuit. Results show that intrinsic relative uncertainty of 10-9 on velocity can be reached with this method over a translation range of 80 mm
Keywords :
Michelson interferometers; measurement by laser beam; measurement uncertainty; phase shifting interferometry; velocity control; 80 nm; BNM watt balance project; Michelson interferometer; phase shifting electronic circuit; velocity control method; Coils; Displacement measurement; Electronic circuits; Frequency; Mirrors; Optical beams; Optical devices; Optical interferometry; Velocity control; Velocity measurement;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2004 Conference on
Conference_Location :
London
Print_ISBN :
0-7803-8494-6
Electronic_ISBN :
0-7803-8494-6
DOI :
10.1109/CPEM.2004.305565
