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Title: Multiple-reflection optical gas cell

Abstract

A multiple-reflection optical cell for Raman or fluorescence gas analysis consists of two spherical mirrors positioned transverse to a multiple-pass laser cell in a confronting plane-parallel alignment. The two mirrors are of equal diameter but possess different radii of curvature. The spacing between the mirrors is uniform and less than half of the radius of curvature of either mirror. The mirror of greater curvature possesses a small circular portal in its center which is the effective point source for conventional F1 double lens collection optics of a monochromator-detection system. Gas to be analyzed is flowed into the cell and irradiated by a multiply-reflected composite laser beam centered between the mirrors of the cell. Raman or fluorescence radiation originating from a large volume within the cell is (1) collected via multiple reflections with the cell mirrors, (2) partially collimated and (3) directed through the cell portal in a geometric array compatible with F1 collection optics.

Inventors:
 [1]
  1. Oak Ridge, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
864740
Patent Number(s):
4410271
Assignee:
Matthews, Thomas G. (Oak Ridge, TN)
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
multiple-reflection; optical; gas; cell; raman; fluorescence; analysis; consists; spherical; mirrors; positioned; transverse; multiple-pass; laser; confronting; plane-parallel; alignment; equal; diameter; possess; radii; curvature; spacing; uniform; half; radius; mirror; possesses; circular; portal; center; effective; source; conventional; f1; double; lens; collection; optics; monochromator-detection; analyzed; flowed; irradiated; multiply-reflected; composite; beam; centered; radiation; originating; volume; collected; via; multiple; reflections; partially; collimated; directed; geometric; array; compatible; optical cell; gas analysis; multiple reflections; laser beam; spherical mirror; spherical mirrors; gas cell; collection optics; multiple-reflection optical; fluorescence radiation; multiple reflection; pass laser; reflection optical; /356/

Citation Formats

Matthews, Thomas G. Multiple-reflection optical gas cell. United States: N. p., 1983. Web.
Matthews, Thomas G. Multiple-reflection optical gas cell. United States.
Matthews, Thomas G. Sat . "Multiple-reflection optical gas cell". United States. https://www.osti.gov/servlets/purl/864740.
@article{osti_864740,
title = {Multiple-reflection optical gas cell},
author = {Matthews, Thomas G},
abstractNote = {A multiple-reflection optical cell for Raman or fluorescence gas analysis consists of two spherical mirrors positioned transverse to a multiple-pass laser cell in a confronting plane-parallel alignment. The two mirrors are of equal diameter but possess different radii of curvature. The spacing between the mirrors is uniform and less than half of the radius of curvature of either mirror. The mirror of greater curvature possesses a small circular portal in its center which is the effective point source for conventional F1 double lens collection optics of a monochromator-detection system. Gas to be analyzed is flowed into the cell and irradiated by a multiply-reflected composite laser beam centered between the mirrors of the cell. Raman or fluorescence radiation originating from a large volume within the cell is (1) collected via multiple reflections with the cell mirrors, (2) partially collimated and (3) directed through the cell portal in a geometric array compatible with F1 collection optics.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {1}
}

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