Optical waveguides – Optical waveguide sensor
Patent
1991-04-01
1992-10-06
Lee, John D.
Optical waveguides
Optical waveguide sensor
385144, 385123, G02B 602
Patent
active
051539314
ABSTRACT:
An apparatus and method for detecting a chemical substance by exposing an optic fiber having a core and a cladding to the chemical substance so that the chemical substance can be adsorbed onto the surface of the cladding. The optic fiber is coiled inside a container having a pair of valves for controlling the entrance and exit of the substance. Light from a light source is received by one end of the optic fiber, preferably external to the container, and carried by the core of the fiber. Adsorbed substance changes the transmissivity of the fiber as measured by a spectrophotometer at the other end, also preferably external to the container. Hydrogen is detected by the absorption of infrared light carried by an optic fiber with a silica cladding. Since the adsorption is reversible, a sensor according to the present invention can be used repeatedly. Multiple positions in a process system can be monitored using a single container that can be connected to each location to be monitored so that a sample can be obtained for measurement, or, alternatively, containers can be placed near each position and the optic fibers carrying the partially-absorbed light can be multiplexed for rapid sequential reading by a single spectrophotometer.
REFERENCES:
patent: 3998591 (1976-12-01), Eckfeldt
patent: 4661320 (1987-04-01), Ito et al.
patent: 4668635 (1987-05-01), Forster
patent: 4718747 (1988-01-01), Bianchi et al.
patent: 4763009 (1988-08-01), Fevrier et al.
patent: 4764343 (1988-08-01), Nyberg
patent: 4824789 (1989-04-01), Yafuso et al.
patent: 4834497 (1989-05-01), Angel
patent: 4849172 (1989-07-01), Yafuso et al.
patent: 4861727 (1989-08-01), Hauenstein et al.
patent: 4927768 (1990-05-01), Coughlin et al.
patent: 4929049 (1990-05-01), Le Goullon
patent: 4954318 (1990-09-01), Yafuso et al.
patent: 5006314 (1991-04-01), Gourley et al.
patent: 5026139 (1991-06-01), Klainer et al.
Buchanan Bruce R.
Prather William S.
Barns S. W.
Constant Richard E.
Dixon Harold M.
Lee John D.
Moser William R.
LandOfFree
Fiber optic hydrogen sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fiber optic hydrogen sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fiber optic hydrogen sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1196575