Francini, F.; Macchiarulo, M.; Tiribilli, B.; Buah-Bassuah, P. K.
(University of Cape Coast, 1987)
A device capable of measuring small displacements ~nd vibrati~ns o~ a n:oving body is .presented. A small mirror, firmly attached to the object unde~ mv.eStlgatlOn, defiect~ a paIr ~~laser beams onto two distinct photodetectors. ...