Abstract

A new laser Doppler velocimeter (LDV) where the waveform of Doppler signal changes according to the direction of the velocity vector is proposed. This feature makes it possible to measure selectively a specified velocity vector. A practical LDV system is constructed to be applied to the measurement of the falling velocity of raindrops. In this system the selection of a specified velocity vector is carried out by the detection of a difference between the two periods separated by one cycle of Doppler frequency in a Doppler burst. The experimental results show clearly the usefulness of this system.

© 1980 Optical Society of America

Simultaneous measurement of falling velocity and size of large droplets using a laser system

Osami Sasaki, Takeo Abe, and Tomio Shimizu
Appl. Opt. 19(7) 1151-1153 (1980)

Simultaneous measurement of the velocity and the displacement of the moving rough surface by a laser Doppler velocimeter

K. Matsubara, W. Stork, A. Wagner, J. Drescher, and K. D. Müller-Glaser
Appl. Opt. 36(19) 4516-4520 (1997)

Remote measurement of the transverse wind velocity component using a laser Doppler velocimeter

L. Z. Kennedy and J. W. Bilbro
Appl. Opt. 18(17) 3010-3013 (1979)

Follow-up-type laser Doppler velocimeter using single-mode optical fibers

Osami Sasaki, Takuso Sato, Takeo Abe, Toshiro Mizuguchi, and Masaki Niwayama
Appl. Opt. 19(8) 1306-1308 (1980)

Laser Doppler velocimeter with a novel optical fiber probe

Kazuo Kyuma, Shuichi Tai, Koichi Hamanaka, and Masahiro Nunoshita
Appl. Opt. 20(14) 2424-2427 (1981)