Laser-optical arrangement for measuring the degree of dispersion in flowing systems
First Claim
1. 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 comprisingmeans for producing pulse-like optical signals from said flowing particles or groups of particles, said producing means includingoptical 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, andsaid 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, andmeans for deriving from said fluctuations an integrated measurement of the root-mean-square value, thereby to determine the degree of dispersion.
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Accused Products
Abstract
In a laser-optical arrangement for producing signals by light scattering, obscuration or reflection, from flowing particles and/or groups of particles, which are recorded, as time-dependent voltage/current fluctuations, by means of a photodetector (9) via appropriate imaging optics (7,8,18), assignment to the degree of dispersion of the flowing system is based on a subsequent measurement (10) of the root-mean-square value, and, according to the invention, the sample stream (1) is separated from a transmitter (6,7,18) and a receiver (8,9,10) by an enveloping stream (4), and the transmitter side consists of an individual light-transmitting fiber (7) provided with a means for parallel or focused emergence of a light bundle having a diameter of the order of magnitude of the particles and/or groups of particles.
84 Citations
6 Claims
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1. 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.
Specification