Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1995-12-14
1998-04-14
Wong, Don
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
25033911, 250253, 25033912, G01J 502
Patent
active
057395365
ABSTRACT:
A system for the in-situ detection of chemicals, including water, in soil comprises: a penetrometer for penetrating the soil, the penetrometer including interior and exterior surfaces, and a window for allowing infrared radiation to be transmitted between the interior and exterier surfaces of the penetrometer; a driver for driving the penetrometer into the soil to a plurality of different depths; a source for providing infrared radiation which passes through the window to irradiate the soil adjacent to the window; an infrared transmitting chalcogenide optical fiber; an optical system disposed within the penetrometer adjacent to the window for transmitting infrared radiation from the source through the window into the soil and for collecting infrared radiation reflected from the soil back through the window into a first end of the chalcogenide fiber; and a spectrometer coupled to a second end of the infrared transmitting chalcogenide optical fiber for receiving and analyzing the reflected infrared radiation passing through the chalcogenide optical fiber to obtain information on chemicals present at various depths of the soil through which the penetrometer passes.
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Publication, "Fiber Optic IR Reflectance Sensor for the Cone Penetrometer" y G. Nau et al., SPIE Germany 1995, Jun., SPIE vol. 2504, pp. 291-296 (1995).
Publication, "Fiber-Optic Near-Infrared Reflectance Sensor For Detection of Organics in Soils", by Irwin Schneider et al., IEEE Photonics Technology Letters, vol. 7, No. 1 (Jan. 1995).
Publication, "Fiber Optic Infrared Reflectance Probe for Detection of Hydrocarbon Fuels in Soil" by K.J. Ewing et al., SPIE, vol 2367, McLean, VA, 9-10 No. 94, pp. 17-23 (1995). no month.
Publication, "Fabrication of Low-Loss Ir-Transmitting Ge.sub.30 As.sub.10 Se.sub.30 Te.sub.30 Glass Fibers" by J. S. Sanghera et al., Journal of Lightwave Technology, vol. 12, No. 5 pp. 737-741, (May 1994).
Publication, entitled "Optical and Mechanical Properties of IR Transmitting Chalcogenide Glass Fibers" by S. Sanghera et al. in Optical Network Engineering and Integrity, published by SPIE, vol. 2611, pp. 2-6, (24-25 Oct. 1995).
Publication, "Fabrication of Long Lengths of Low-Loss IR Transmitting As.sub.40 S (60--.sub.x)Se.sub.x Glass Fibers" by J.S. Sanghera et al., Journal of Lightwave Technology, vol. 14, No. 5, pp. 743-749 (May 1996).
Aggarwal Ishwar D.
Bucholtz Frank
Ewing Kenneth J.
Nau Gregory
Sanghera Jasbinder S.
Jameson George
McDonnell Thomas E.
The United States of America as represented by the Secretary of
Wong Don
LandOfFree
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