Abstract

A new instrument for velocity and size measurement of large particles in two-phase flows was introduced and demonstrated. This instrument which is based on the laser interferometer technique uses two Ronchi gratings. The two separate diffraction modes formed by the gratings interfere with each other and generate the necessary fringe pattern. The instrument can be continuously matched to particles from 100 μm to the centimeter range.

© 1984 Optical Society of America

Nonintrusive optical single-particle counter for measuring the size and velocity of droplets in a spray

Cecil F. Hess
Appl. Opt. 23(23) 4375-4382 (1984)

Fast-moving suspended particles: measurements of their size and velocity

Jin Wu
Appl. Opt. 16(3) 596-600 (1977)

Sample space for particle size and velocity measuring interferometers

W. M. Farmer
Appl. Opt. 15(8) 1984-1989 (1976)

Measurement of Particle Size, Number Density, and Velocity Using a Laser Interferometer

W. M. Farmer
Appl. Opt. 11(11) 2603-2612 (1972)

Local velocity and size measurements of particles in dense suspensions: theory and design of endoscopic grating velocimeter–granulometers

A. Cartellier
Appl. Opt. 31(18) 3493-3505 (1992)