Fiber Optic Sensor Utilizing Broadband Sources
First Claim
1. A sensor system configured to direct illuminating light onto a composition so as:
- to produce detection radiation along a detection beam path for measuring a plurality of parameters in a composition that comprises;
a high brightness light source;
means for generating detection radiation from the high brightness light source wherein the detection radiation has predetermined wavelength ranges to detect a plurality of parameters in the composition;
a fiber optic radiation delivery system that delivers the detection radiation to an optical head comprising first optics operable to direct the detection radiation to the composition and second optics operable to direct light that emerges from the composition to a fiber optic radiation retrieval system;
a detector operable to receive and measure light from the fiber optic radiation retrieval system;
a dispersive element that is disposed in the detection beam path; and
means for analyzing the light from the fiber optic radiation retrieval system to calculate the plurality of parameters of the composition).
1 Assignment
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Accused Products
Abstract
Fiber optic sensors employ a high brightness light source such as a fiber optic supercontinuum source, multiplexed superluminescent light emitting diodes, or a broadband tunable laser diode. Light is delivered to the measurement location via fiber optics and sensor optics directs infrared radiation onto material the being monitored that is located in a hostile environment. A disperse element is positioned in the detection beam path in order to separate the wavelengths and to perform spectral analysis. A spectral analysis of the radiation that emerges from the sheet yields information on a plurality of parameters for the material. For papermaking applications, the moisture level, temperature and cellulose content in the paper can be obtained.
29 Citations
23 Claims
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1. A sensor system configured to direct illuminating light onto a composition so as:
- to produce detection radiation along a detection beam path for measuring a plurality of parameters in a composition that comprises;
a high brightness light source; means for generating detection radiation from the high brightness light source wherein the detection radiation has predetermined wavelength ranges to detect a plurality of parameters in the composition; a fiber optic radiation delivery system that delivers the detection radiation to an optical head comprising first optics operable to direct the detection radiation to the composition and second optics operable to direct light that emerges from the composition to a fiber optic radiation retrieval system; a detector operable to receive and measure light from the fiber optic radiation retrieval system; a dispersive element that is disposed in the detection beam path; and means for analyzing the light from the fiber optic radiation retrieval system to calculate the plurality of parameters of the composition). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- to produce detection radiation along a detection beam path for measuring a plurality of parameters in a composition that comprises;
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12. A method of performing measurements with a sensor that detects a plurality of parameters in a composition that comprises the steps of:
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providing a high brightness light source that is located remotely from the composition; providing an optical head comprising a first optics that directs radiation to the composition and a second optics that collects radiation that emerges from the composition; providing a fiber optic radiation delivery system for directing radiation from the high brightness light source to the first optics; providing a fiber optic radiation retrieval system for receiving radiation that is directed from the second optics and for transmitting the radiation to a radiation detector, wherein the high brightness light source generates illuminating radiation of sufficient optical power density to produce detection radiation along a detection beam path to the radiation detector; positioning a dispersive element in the detection beam path; and analyzing the light from the fiber optic radiation retrieval system to calculate the plurality of parameters of the composition. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification