JP5624548B2 - 波長変調スペクトロスコピーの方法及び装置 - Google Patents
波長変調スペクトロスコピーの方法及び装置 Download PDFInfo
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- JP5624548B2 JP5624548B2 JP2011531054A JP2011531054A JP5624548B2 JP 5624548 B2 JP5624548 B2 JP 5624548B2 JP 2011531054 A JP2011531054 A JP 2011531054A JP 2011531054 A JP2011531054 A JP 2011531054A JP 5624548 B2 JP5624548 B2 JP 5624548B2
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- 238000004611 spectroscopical analysis Methods 0.000 title claims description 36
- 238000000034 method Methods 0.000 title claims description 12
- 230000005855 radiation Effects 0.000 claims description 50
- 239000012491 analyte Substances 0.000 claims description 24
- 238000001228 spectrum Methods 0.000 claims description 24
- 238000005259 measurement Methods 0.000 claims description 8
- 238000011896 sensitive detection Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 3
- 238000004847 absorption spectroscopy Methods 0.000 claims description 2
- 238000002835 absorbance Methods 0.000 claims 2
- 238000010521 absorption reaction Methods 0.000 description 42
- 230000005540 biological transmission Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 206010034972 Photosensitivity reaction Diseases 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004868 gas analysis Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000036211 photosensitivity Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
- G01J3/433—Modulation spectrometry; Derivative spectrometry
- G01J3/4338—Frequency modulated spectrometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
- G01N2021/396—Type of laser source
- G01N2021/399—Diode laser
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
- G01N21/274—Calibration, base line adjustment, drift correction
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Optics & Photonics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
上式において、Xはサンプル内の検体のモル分率として表現される吸収性検体の濃度であり、Pはサンプルの総圧力であり、S(T)は温度依存のスペクトル線強度であり、Lは吸収経路長であり、かつΦ(ν)はスペクトル線プロファイル関数である。
112 サンプルインレット
114 サンプルアウトレット
115 単色放射放出デバイス
120 駆動回路
130 コリメータ
132 ウィンドウ
135 ミラー
140 光検出器
142 チェンバー
145 基準光検出器
150 ビーム分割器
155 圧力センサ
160 温度センサ
165 電子回路
170 I/Oインタフェース
175 キーパッド
180 ディスプレイ
Claims (7)
- 単色放射の波長をある変調振幅及び変調周波数で変調するステップと、
サンプル内の検体の吸光度である第1の変数値を、サンプルに入る単色放射の強度とサンプルを出る単色放射の強度との比に基づいて決定するステップと、
前記検体の高調波スペクトルを生成するように位相敏感検出によって前記変調周波数の高調波で前記第1の変数値を復調するステップと、
を含むスペクトロスコピー方法。 - 前記単色放射はレーザーによって提供されている、請求項1に記載の方法。
- 前記高調波は前記変調周波数の第2の高調波である、請求項1または2に記載の方法。
- 前記高調波スペクトルの大きさは前記サンプル内の前記検体の濃度と線形関係にある、請求項1から3のいずれかに記載の方法。
- 第1の光検出器と一体化させたレーザダイオードであって、前記第1の光検出器は該レーザダイオードからの後方放出の強度を検出すると共に基準検出器の役割をするように構成されているレーザダイオードと、
サンプルを出るレーザー放射の強度を検出するように構成された第2の光検出器と、
前記レーザダイオード並びに前記第1及び第2の光検出器に結合されており、前記サンプルのスペクトルを収集し処理するように構成された電子回路と、
を備え、
前記電子回路が、
単色放射の波長をある変調振幅及び変調周波数で変調し、
サンプル内の検体の吸光度である第1の変数値を、サンプルに入る単色放射の強度とサンプルを出る単色放射の強度との比に基づいて決定し、
前記検体の高調波スペクトルを生成するように位相敏感検出によって前記変調周波数の高調波で前記第1の変数値を復調する、
スペクトロスコピー装置。 - 前記レーザダイオードはさらに熱電クーラー及び温度センサと一体化されている、請求項5に記載のスペクトロスコピー装置。
- 直接吸収スペクトロスコピー計測と高調波スペクトロスコピー計測の少なくとも一方を実行するように構成させた請求項5または6に記載のスペクトロスコピー装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/249,156 US7957001B2 (en) | 2008-10-10 | 2008-10-10 | Wavelength-modulation spectroscopy method and apparatus |
US12/249,156 | 2008-10-10 | ||
PCT/US2009/057228 WO2010042301A2 (en) | 2008-10-10 | 2009-09-17 | Wavelength-modulation spectroscopy method |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2012505405A JP2012505405A (ja) | 2012-03-01 |
JP5624548B2 true JP5624548B2 (ja) | 2014-11-12 |
Family
ID=41397472
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2011531054A Active JP5624548B2 (ja) | 2008-10-10 | 2009-09-17 | 波長変調スペクトロスコピーの方法及び装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7957001B2 (ja) |
EP (1) | EP2342544A2 (ja) |
JP (1) | JP5624548B2 (ja) |
CN (1) | CN102177423A (ja) |
BR (1) | BRPI0914082A2 (ja) |
WO (1) | WO2010042301A2 (ja) |
Families Citing this family (19)
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US8547554B2 (en) * | 2011-08-17 | 2013-10-01 | General Electric Company | Method and system for detecting moisture in natural gas |
US9459209B2 (en) * | 2012-06-04 | 2016-10-04 | Shimadzu Corporation | Gas analysis device |
CN102829866B (zh) * | 2012-08-06 | 2014-08-13 | 山东省科学院激光研究所 | 分布反馈式光纤激光器无源光谱测量系统 |
US9194797B2 (en) | 2013-12-20 | 2015-11-24 | General Electric Company | Method and system for detecting moisture in a process gas involving cross interference |
EP2944944B1 (en) | 2014-05-12 | 2021-10-20 | General Electric Company | Gas detector and method of detection |
US10024787B2 (en) | 2014-05-15 | 2018-07-17 | General Electric Company | System and method for measuring concentration of a trace gas in a gas mixture |
WO2016069744A1 (en) | 2014-10-29 | 2016-05-06 | Bridger Photonics, Inc. | Accurate chirped synthetic wavelength interferometer |
CN104501949B (zh) * | 2014-12-29 | 2016-08-24 | 中国科学院长春光学精密机械与物理研究所 | 基于替代法和探测器效率的腔体吸收率测量方法 |
US9500580B1 (en) | 2015-06-04 | 2016-11-22 | General Electric Company | Gas detector and method of detection |
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-
2008
- 2008-10-10 US US12/249,156 patent/US7957001B2/en active Active
-
2009
- 2009-09-17 WO PCT/US2009/057228 patent/WO2010042301A2/en active Application Filing
- 2009-09-17 CN CN2009801406113A patent/CN102177423A/zh active Pending
- 2009-09-17 JP JP2011531054A patent/JP5624548B2/ja active Active
- 2009-09-17 BR BRPI0914082A patent/BRPI0914082A2/pt not_active IP Right Cessation
- 2009-09-17 EP EP09792638A patent/EP2342544A2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
WO2010042301A8 (en) | 2010-05-14 |
BRPI0914082A2 (pt) | 2015-10-27 |
CN102177423A (zh) | 2011-09-07 |
JP2012505405A (ja) | 2012-03-01 |
WO2010042301A3 (en) | 2010-07-01 |
US7957001B2 (en) | 2011-06-07 |
US20100091278A1 (en) | 2010-04-15 |
EP2342544A2 (en) | 2011-07-13 |
WO2010042301A2 (en) | 2010-04-15 |
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