Title :
1-arm phase optical bridge with axial symmetry (with interference Newton fringes) for measuring small periodic displacements
Author :
Borisov, M.I. ; Burov, J.I.
Author_Institution :
Sofia University, Department of Solid State Physics, Faculty of Physics, Sofia, Bulgaria
Abstract :
A 1-arm phase optical bridge with axial symmetry (with interference Newton fringes) is developed for the measurement of small periodic displacements of acoustic frequency. Using the synchronous detection method, a vibration with an amplitude as small as 3×10¿14 m is measured.
Keywords :
bridge instruments; displacement measurement; laser beam applications; optical modulation; phase modulation; vibration measurement; bridge instruments; interference Newton fringes; optical modulation; phase modulation; small periodic displacement; synchronous detection method; vibration measurement;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19730262
