Measurement of droplet velocity, size and refractive index using the pulse displacement technique

There is a current requirement to detect and quantify the presence of gas bubbles in oil exploration. For this reason a novel method has been developed to measure simultaneously the velocity, size and refractive index of large optically transparent bubbles and droplets. The method is based on the time displacement of refracted and reflected beams scattered from the moving particles. Experimental results obtained from water droplets are included.