A theory of the double-edge technique for lidar measurement of wind speed D
oppler shifts was recently presented by Flesia and Korb [Appl. Opt. 33, 432
(1999)]. It is shown here that the technique proposed by Flesia and Korb t
o achieve equal responsivity to aerosol and Rayleigh backscatter signals wa
s previously conceived and demonstrated by another group. (C) 2000 Optical
Society of America.