G - Physics – 01 – N
Patent
G - Physics
01
N
73/51.5
G01N 21/00 (2006.01) G01N 21/47 (2006.01) G01N 21/64 (2006.01) G01N 21/85 (2006.01)
Patent
CA 1172058
ABSTRACT "ANALYTICAL OPTICAL INSTRUMENTS" An optical measuring system for measuring in situ by means of one or more fibre optic probes reflection absorption fluores- cence, phosphorescence and turbidity of a fluid or (for all but the last measurement) of a fluid-solid interface. High intensity pulsed light is conveyed to the measurement site by a fibre-optic cable and is given a specific direction at the site by means of the geometry of the probe, reaction light result- ing from the stimulating light pulse is discriminated by the geometry of the probe, or another probe, and is returned via a further fibre-optic cable to a measurement system which is enabled to sense the returning light only for the duration of the light pulse. The measurement system comprises means for sensing the relative intensity of the stimulating light pulse and for deriving a signal at least representative of the ratio of the magnitude of the quality sensed, by means of the probe,and the relative intensity of the stimulating light pulse. In one embodi- ment a unitary probe has three light channels, one conveying light to the site, one conveying light to the measurement system at least representative of the stimulating light intensity at the site and the last providing to the measurement system a signal representative of the magnitude of the quality of interest.
384318
Griffiths David
Knight John H.g.
Fetherstonhaugh & Co.
Oriel Scientific Limited
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