Abstract

We have developed a new optical Doppler-velocimetry technique for seeded flows illuminated by a monochromatic laser light-sheet. In contrast to conventional laser Doppler velocimetry¹ (LDV) based on scanned, point-by-point measurements, our technique yields global, simultaneous, and quantitative visualization of the flow velocities over the illuminated plane. We have applied the technique to a free-expansion jet at near sonic velocities in a small wind tunnel.

© 1990 Optical Society of America