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Title: Fiber optic probe for light scattering measurements

Abstract

This invention is comprised of a fiber optic probe and a method for using the probe for light scattering analyses of a sample. The probe includes a probe body with an inlet for admitting a sample into an interior sample chamber, a first optical fiber for transmitting light from a source into the chamber, and a second optical fiber for transmitting light to a detector such as a spectrophotometer. The interior surface of the probe carries a coating that substantially prevents non-scattered light from reaching the second fiber. The probe is placed in a region where the presence and concentration of an analyte of interest are to be detected, and a sample is admitted into the chamber. Exciting light is transmitted into the sample chamber by the first fiber, where the light interacts with the sample to produce Raman-scattered light. At least some of the Raman- scattered light is received by the second fiber and transmitted to the detector for analysis. Two Raman spectra are measured, at different pressures. The first spectrum is subtracted from the second to remove background effects, and the resulting sample Raman spectrum is compared to a set of stored library spectra to determine the presencemore » and concentration of the analyte.« less

Inventors:
; ;
Publication Date:
Research Org.:
Westinghouse Savannah River Co., Aiken, SC (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
206456
Patent Number(s):
PATENTS-US-A8154353
Application Number:
ON: DE96005167; PAN: 8-154,353
Assignee:
Dept. of Energy
DOE Contract Number:  
AC09-89SR18035
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 1993
Country of Publication:
United States
Language:
English
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; PROBES; DESIGN; INVENTIONS; FIBER OPTICS; OPTICAL FIBERS; LIGHT TRANSMISSION; RAMAN EFFECT

Citation Formats

Nave, S E, Livingston, R R, and Prather, W S. Fiber optic probe for light scattering measurements. United States: N. p., 1993. Web.
Nave, S E, Livingston, R R, & Prather, W S. Fiber optic probe for light scattering measurements. United States.
Nave, S E, Livingston, R R, and Prather, W S. Fri . "Fiber optic probe for light scattering measurements". United States. https://www.osti.gov/servlets/purl/206456.
@article{osti_206456,
title = {Fiber optic probe for light scattering measurements},
author = {Nave, S E and Livingston, R R and Prather, W S},
abstractNote = {This invention is comprised of a fiber optic probe and a method for using the probe for light scattering analyses of a sample. The probe includes a probe body with an inlet for admitting a sample into an interior sample chamber, a first optical fiber for transmitting light from a source into the chamber, and a second optical fiber for transmitting light to a detector such as a spectrophotometer. The interior surface of the probe carries a coating that substantially prevents non-scattered light from reaching the second fiber. The probe is placed in a region where the presence and concentration of an analyte of interest are to be detected, and a sample is admitted into the chamber. Exciting light is transmitted into the sample chamber by the first fiber, where the light interacts with the sample to produce Raman-scattered light. At least some of the Raman- scattered light is received by the second fiber and transmitted to the detector for analysis. Two Raman spectra are measured, at different pressures. The first spectrum is subtracted from the second to remove background effects, and the resulting sample Raman spectrum is compared to a set of stored library spectra to determine the presence and concentration of the analyte.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}