Laser-optical arrangement for measuring the degree of dispersion in flowing systems

A laser-optical arrangment for measuring the degree of dispersion in a flowing two-phase system containing flowing particles or groups of particles, said arrangement comprising

• means for producing pulse-like optical signals from said flowing particles or groups of particles, said producing means including
• optical transmitting means and optical receiving means, and a measuring cell containing enveloping means for separating said flowing system from said transmitting and receiving means,
• said transmitting means containing a source of laser light, a first light guide in the form of an individual light transmitting fiber and a lens system for causing a parallel or focused light bundle to emerge therefrom which has a diameter of the order of magnitude of the particles or groups of particles, and
• said receiving means containing a second light guide in the form of a light-transmitting fiber bundle, and a photodetector for producing from said optical signals time-dependent current/voltage fluctuations, and
• means for deriving from said fluctuations an integrated measurement of the root-mean-square value, thereby to determine the degree of dispersion.