Title:
【発明の名称】物質検出のための差分吸収放射分析に基づく光学経路スイッチング
Document Type and Number:
Japanese Patent JP2002541476
Kind Code:
A
Abstract:
An optical path switch divides sample path radiation into a time series of alternating first polarized components and second polarized components. The first polarized components are transmitted along a first optical path and the second polarized components along a second optical path. A first gasless optical filter train filters the first polarized components to isolate at least a first wavelength band thereby generating first filtered radiation. A second gasless optical filter train filters the second polarized components to isolate at least a second wavelength band thereby generating second filtered radiation. A beam combiner combines the first and second filtered radiation to form a combined beam of radiation. A detector is disposed to monitor magnitude of at least a portion of the combined beam alternately at the first wavelength band and the second wavelength band as an indication of the concentration of the substance in the sample path.
Inventors:
Sach shoes, glen
Application Number:
JP2000611054A
Publication Date:
December 03, 2002
Filing Date:
November 10, 1999
Export Citation:
Assignee:
THE UNITED STATES OF AMERICA
International Classes:
G01J3/08; G01J3/42; G01J3/447; G01N21/21; G01N21/31; G01N21/35; G02B5/30; (IPC1-7): G01N21/21; G01J3/08; G01J3/42; G01J3/447; G01N21/35; G02B5/30
Attorney, Agent or Firm:
Kazuo Shamoto (5 outside)