JP5022363B2 - 光音響検出器及び光音響検出方法 - Google Patents
光音響検出器及び光音響検出方法 Download PDFInfo
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- JP5022363B2 JP5022363B2 JP2008518692A JP2008518692A JP5022363B2 JP 5022363 B2 JP5022363 B2 JP 5022363B2 JP 2008518692 A JP2008518692 A JP 2008518692A JP 2008518692 A JP2008518692 A JP 2008518692A JP 5022363 B2 JP5022363 B2 JP 5022363B2
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- photoacoustic
- acoustic
- excitation light
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- 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
- G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
-
- 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
- G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
- G01N2021/1704—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids in gases
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/02809—Concentration of a compound, e.g. measured by a surface mass change
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- 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)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
本発明の適用方法については、図1−3を補助的に用いて後述する。
2 光学ミラー
3 第1音響ミラー
4 第2音響ミラー
5 マイクロホン
Claims (13)
- 音響的に開いた測定領域を有し、筐体によって完全には覆われていない、希ガス測定のための光音響検出器であって、
測定領域に位置する吸収剤によって、音響エネルギー生成により励起光を吸収することができるように、励起光を測定領域に導入する手段と、
少なくとも1つの音響センサと、
前記励起光が前記測定領域を数回通過できるように前記測定領域を挟んで対向する2つの光反射要素と、前記測定領域を挟んで対向する2つの音響ミラーを有することにより、少なくとも1つの位置で、音圧の極大値を達成する手段(2,3,4)とを備え、
生成されたまたは生成しうる音圧が極大値となる少なくとも1つの位置の近傍に、前記少なくとも1つの音響センサ(5)が配置されることを特徴とする光音響検出器。 - 前記2つの音響ミラーは、前記光反射要素と異なる方向で前記測定領域を挟んで対向することを特徴とする請求項1に記載の光音響検出器。
- 前記2つの音響ミラーは、少なくとも1つの位置に前記音圧の極大値で達することができるように、前記励起光の吸収により生成された前記音響エネルギーに影響を与えることができる要素(3,4)であることを特徴とする請求項1または2に記載の光音響検出器。
- 前記音圧が極大値をもつような少なくとも1つの位置に、達することができるような音響エネルギー集中が起こりうるような分布を、前記励起光によって生成された音響エネルギーが持つように、前記光反射要素を、音響エネルギーの集中について備えることを特徴とする請求項1〜3のいずれか1つに記載の光音響検出器。
- 前記音響ミラーのうち少なくとも1つは、前記測定領域に向かってくぼんで構成されることを特徴とする請求項1〜4のいずれか1つに記載の光音響検出器。
- 前記音響ミラーは、放物線状のミラーであることを特徴とする請求項1〜4のいずれか1つに記載の光音響検出器。
- 前記光反射要素は、前記励起光の分布のための要素として備えられていることを特徴とする請求項1〜6のいずれか1つに記載の光音響検出器。
- 前記励起光はパルス化と変調の一方または両方をして導入することができ、
前記光パルスの前記繰り返し周波数と前記変調周波数の一方または両方が、前記音響センサ(5)の最大感度にマッチすることを特徴とする請求項1〜7のいずれか1つに記載の光音響検出器。 - 周波数の上限が50−100kHzの範囲であるコンデンサマイクロホン(5)とエレクトレットマイクロホンの一方または両方が、音響センサとして備えられることを特徴とする請求項1〜8のいずれか1つに記載の光音響検出器。
- 前記コンデンサマイクロホン(5)とエレクトレットマイクロホンの一方または両方を、励起光の繰り返し周波数を1−10kHzで設計することにより、高調波で測定することを特徴とする請求項9に記載の光音響検出器。
- 超音波センサが音響センサとして備えられることを特徴とする請求項1〜8のいずれか1つに記載の光音響検出器。
- 請求項1〜11のいずれか1つに記載の光音響検出器が用いられる吸収材料の光音響検出方法。
- 内部空間での気体の品質を監視するステップであって、特に内部空間での換気システムに吸い込まれる気体を監視することを含む、請求項12に記載の光音響検出方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005030151A DE102005030151B3 (de) | 2005-06-28 | 2005-06-28 | Photoakustischer Freifelddetektor |
DE102005030151.7 | 2005-06-28 | ||
PCT/EP2006/006131 WO2007000297A1 (de) | 2005-06-28 | 2006-06-26 | Photoakustischer freifelddetektor |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008544291A JP2008544291A (ja) | 2008-12-04 |
JP5022363B2 true JP5022363B2 (ja) | 2012-09-12 |
Family
ID=36851157
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008518692A Expired - Fee Related JP5022363B2 (ja) | 2005-06-28 | 2006-06-26 | 光音響検出器及び光音響検出方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20090038375A1 (ja) |
EP (1) | EP1902303A1 (ja) |
JP (1) | JP5022363B2 (ja) |
DE (1) | DE102005030151B3 (ja) |
WO (1) | WO2007000297A1 (ja) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102007014519A1 (de) | 2007-03-27 | 2008-10-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Photoakustischer Detektor zur Messung von Feinstaub |
DE102007043951B4 (de) * | 2007-09-14 | 2009-07-30 | Protronic Innovative Steuerungselektronik Gmbh | Vorrichtung zur Detektion von Molekülen in Gasen |
JP5371268B2 (ja) * | 2008-03-14 | 2013-12-18 | 三菱重工業株式会社 | ガス濃度計測方法および装置 |
JP5749164B2 (ja) | 2008-07-25 | 2015-07-15 | ヘルムホルツ・ツェントルム・ミュンヒェン・ドイチェス・フォルシュンクスツェントルム・フューア・ゲズントハイト・ウント・ウムベルト(ゲーエムベーハー)Helmholtz Zentrum MuenchenDeutsches Forschungszentrum fuer Gesundheit und Umwelt (GmbH) | 組織バイオマーカーの定量的多重スペクトル光音響トモグラフィ |
EP2449362B1 (en) | 2009-06-29 | 2016-09-28 | Helmholtz Zentrum München Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH) | Thermoacoustic imaging with quantitative extraction of absorption map |
US10292593B2 (en) | 2009-07-27 | 2019-05-21 | Helmholtz Zentrum München Deutsches Forschungszentrum Für Gesundheit Und Umwelt (Gmbh) | Imaging device and method for optoacoustic imaging of small animals |
US8848191B2 (en) | 2012-03-14 | 2014-09-30 | Honeywell International Inc. | Photoacoustic sensor with mirror |
EP2742854B1 (en) * | 2012-12-11 | 2021-03-10 | iThera Medical GmbH | Handheld device and method for tomographic optoacoustic imaging of an object |
EP2754388B1 (en) | 2013-01-15 | 2020-09-09 | Helmholtz Zentrum München Deutsches Forschungszentrum für Gesundheit und Umwelt GmbH | System and method for quality-enhanced high-rate optoacoustic imaging of an object |
USD761346S1 (en) * | 2014-11-20 | 2016-07-12 | David Spampinato | Temple sleeve |
NO344002B1 (en) * | 2015-09-29 | 2019-08-12 | Sintef Tto As | Optical gas detector |
DE102015117405A1 (de) * | 2015-10-13 | 2017-04-13 | Rbr Messtechnik Gmbh | Vorrichtung und Verfahren zur Messung der Feinstaubemissionen aus Feuerungen |
US10620165B2 (en) * | 2016-12-29 | 2020-04-14 | Infineon Technologies Ag | Photoacoustic gas analyzer for determining species concentrations using intensity modulation |
CN107014908B (zh) * | 2017-06-14 | 2023-03-17 | 吉林大学 | 一种柔性超声相控阵换能器支架 |
GR1010249B (el) | 2020-10-29 | 2022-06-16 | Αριστοτελειο Πανεπιστημιο Θεσσαλονικης-Ειδικος Λογαριασμος Κονδυλιων Ερευνας, | Διαταξη με αισθητηρα οπτικης απορροφησης με μεγαλη ευαισθησια και μεθοδος χρησης της για περιβαλλοντικες εφαρμογες |
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2005
- 2005-06-28 DE DE102005030151A patent/DE102005030151B3/de not_active Expired - Fee Related
-
2006
- 2006-06-26 US US11/994,056 patent/US20090038375A1/en not_active Abandoned
- 2006-06-26 WO PCT/EP2006/006131 patent/WO2007000297A1/de active Application Filing
- 2006-06-26 EP EP06754567A patent/EP1902303A1/de not_active Ceased
- 2006-06-26 JP JP2008518692A patent/JP5022363B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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WO2007000297A1 (de) | 2007-01-04 |
EP1902303A1 (de) | 2008-03-26 |
DE102005030151B3 (de) | 2006-11-02 |
JP2008544291A (ja) | 2008-12-04 |
US20090038375A1 (en) | 2009-02-12 |
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