With the new approach described here, the two tangential velocity components needed are acquired separately using the principle of optical heterodyne interferometry, and combined to provide rotational information after having been converted into electrical signals. Due to the heterodyning with the unshifted reference beam, this provides an optical amplification of each measurement beam, and thus significantly increases the optical sensitivity of the system.

Date Published: 13 February 1996
PDF: 13 pages
Proc. SPIE 2729, Optical Velocimetry, (13 February 1996); doi: 10.1117/12.233011

Published in SPIE Proceedings Vol. 2729:
Optical Velocimetry
Maksymilian Pluta; Jan Karol Jabczynski; Mariusz Szyjer, Editor(s)