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FR3059779B1 - PHOTOACOUSTIC DETECTOR WITH OPTICAL READ - Google Patents

PHOTOACOUSTIC DETECTOR WITH OPTICAL READ Download PDF

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Publication number
FR3059779B1
FR3059779B1 FR1601731A FR1601731A FR3059779B1 FR 3059779 B1 FR3059779 B1 FR 3059779B1 FR 1601731 A FR1601731 A FR 1601731A FR 1601731 A FR1601731 A FR 1601731A FR 3059779 B1 FR3059779 B1 FR 3059779B1
Authority
FR
France
Prior art keywords
adaptive
detector
acoustic
amplitude
optical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
FR1601731A
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French (fr)
Other versions
FR3059779A1 (en
Inventor
Stephanie Molin
Umberto Bortolozzo
Daniel Dolfi
Jean Pierre Huignard
Arnaud PEIGNE
Stefania Residori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Centre National de la Recherche Scientifique CNRS
Thales SA
Original Assignee
Centre National de la Recherche Scientifique CNRS
Thales SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Centre National de la Recherche Scientifique CNRS, Thales SA filed Critical Centre National de la Recherche Scientifique CNRS
Priority to FR1601731A priority Critical patent/FR3059779B1/en
Publication of FR3059779A1 publication Critical patent/FR3059779A1/en
Application granted granted Critical
Publication of FR3059779B1 publication Critical patent/FR3059779B1/en
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Classifications

    • 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
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/24—Probes
    • 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
    • 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
    • G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
    • G01N21/45—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods
    • G01N21/453—Holographic interferometry

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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)
  • Holo Graphy (AREA)

Abstract

L'invention concerne un détecteur photoacoustique (10) comprenant : -un dispositif de modulation (MD) configuré pour induire sur un faisceau optique une modulation de phase (Aφ) dont l'amplitude est fonction de l'amplitude acoustique et dont la fréquence est fonction de la fréquence acoustique, -un interféromètre adaptatif (AI) configuré pour déterminer l'amplitude acoustique et la fréquence acoustique, et comprenant : * une source cohérente (LS) *un système optique (OS) configuré pour : diriger ledit faisceau référence (WR) et ledit faisceau signal (Ws) dans une zone de l'espace de manière à réaliser une figure d'interférence (IP), *un détecteur holographique (HD) comprenant un hologramme adaptatif (AH) généré à partir de la figure d'interférence, *au moins un détecteur optique (PhD) configuré pour détecter une intensité lumineuse (IDI0) d'au moins un faisceau diffracté par l'hologramme adaptatif, *une première unité de traitement (PU1) configurée pour déterminer le déplacement de l'élément mobile à partir de l'intensité lumineuse détectée.The invention relates to a photoacoustic detector (10) comprising: a modulation device (MD) configured to induce on an optical beam a phase modulation (Aφ) whose amplitude is a function of the acoustic amplitude and whose frequency is function of the acoustic frequency; - an adaptive interferometer (AI) configured to determine the acoustic amplitude and the acoustic frequency, and comprising: * a coherent source (LS) * an optical system (OS) configured to: direct said reference beam ( WR) and said signal beam (Ws) in an area of the space so as to realize an interference pattern (IP), * a holographic detector (HD) comprising an adaptive hologram (AH) generated from FIG. interference, at least one optical detector (PhD) configured to detect a light intensity (IDI0) of at least one beam diffracted by the adaptive hologram, a first processing unit (PU1) configured to determine the displacement of the movable element from the detected light intensity.

FR1601731A 2016-12-06 2016-12-06 PHOTOACOUSTIC DETECTOR WITH OPTICAL READ Active FR3059779B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1601731A FR3059779B1 (en) 2016-12-06 2016-12-06 PHOTOACOUSTIC DETECTOR WITH OPTICAL READ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1601731A FR3059779B1 (en) 2016-12-06 2016-12-06 PHOTOACOUSTIC DETECTOR WITH OPTICAL READ
FR1601731 2016-12-06

Publications (2)

Publication Number Publication Date
FR3059779A1 FR3059779A1 (en) 2018-06-08
FR3059779B1 true FR3059779B1 (en) 2019-05-17

Family

ID=58707586

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1601731A Active FR3059779B1 (en) 2016-12-06 2016-12-06 PHOTOACOUSTIC DETECTOR WITH OPTICAL READ

Country Status (1)

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FR (1) FR3059779B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2023123B1 (en) * 2019-05-13 2020-12-01 Stichting Vu System and method for photoacoustic spectroscopy
CN110333190A (en) * 2019-07-05 2019-10-15 大连理工大学 A Diffusion Photoacoustic Microcavity Gas Sensor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI118548B (en) * 2002-09-30 2007-12-14 Noveltech Solutions Ltd Photoacoustic detector
FR3031590B1 (en) * 2015-01-09 2017-01-13 Thales Sa FIBER OPTIC SENSOR

Also Published As

Publication number Publication date
FR3059779A1 (en) 2018-06-08

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