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1. WO2011064806 - METHOD AND APPARATUS FOR MEASUREMENTS OF LUMINOUS ISOTROPIC RADIATION AS OBTAINED BY MEANS OF LASER SPECTROSCOPY TECHNIQUES, IN PARTICULAR FOR SUB- MICROMETRIC PARTICULATE MEASUREMENTS

Publication Number WO/2011/064806
Publication Date 03.06.2011
International Application No. PCT/IT2010/000462
International Filing Date 22.11.2010
IPC
G01N 21/71 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
71thermally excited
G01N 15/00 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
CPC
G01N 15/0205
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
02Investigating particle size or size distribution
0205by optical means, e.g. by light scattering, diffraction, holography or imaging
G01N 2015/0038
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
0038Investigating nanoparticles
G01N 2015/0277
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
15Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
02Investigating particle size or size distribution
0277Average size only
G01N 21/274
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
27using photo-electric detection
274Calibration, base line adjustment, drift correction
G01N 21/6402
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
63optically excited
64Fluorescence; Phosphorescence
6402Atomic fluorescence; Laser induced fluorescence
G01N 21/71
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
71thermally excited
Applicants
  • CONSIGLIO NAZIONALE DELLE RICERCHE [IT]/[IT] (AllExceptUS)
  • CIGNOLI, Francesco [IT]/[IT] (UsOnly)
  • ZIZAK, Giorgio [IT]/[IT] (UsOnly)
Inventors
  • CIGNOLI, Francesco
  • ZIZAK, Giorgio
Agents
  • PERRONACE, Andrea
Priority Data
RM2009A00061725.11.2009IT
Publication Language English (EN)
Filing Language Italian (IT)
Designated States
Title
(EN) METHOD AND APPARATUS FOR MEASUREMENTS OF LUMINOUS ISOTROPIC RADIATION AS OBTAINED BY MEANS OF LASER SPECTROSCOPY TECHNIQUES, IN PARTICULAR FOR SUB- MICROMETRIC PARTICULATE MEASUREMENTS
(FR) PROCÉDÉ ET APPAREIL PERMETTANT D'EFFECTUER DES MESURES DE RAYONNEMENT ISOTROPE LUMINEUX OBTENUES AU MOYEN DE TECHNIQUES DE SPECTROSCOPIE LASER, EN PARTICULIER DES MESURES DE PARTICULE SUBMICROMÉTRIQUE
Abstract
(EN)
The invention concerns a method for the measurement of the spectrum of isotropic luminous radiation of a gas excited by a laser light, utilizing an apparatus comprising at least a transparent measurement chamber (41 ), and performs the following steps: A. Making said gas pass in said at least a measurement chamber (41); B. Sending a laser beam (21) on said gas in said at least a measurement chamber (41 ). The method uses an integrating sphere (42) substantially enclosing said at least a measurement chamber (41), as well as one or more photo - detectors for measuring the luminous signal collected by the integrating sphere. Before step A a calibration step is performed and, subsequently to step B, the following further steps are performed: C. collecting the light diffused by said gas hit by said laser beam (21 ), by means of said integrating sphere (42), thus obtaining a measurement luminous signal; D. transforming the measurement luminous signal into an electrical signal by means of suitable photo - detectors; E. analysing said electric signal in order to obtain the measurement of the gas spectrum. The invention further concerns a measurement apparatus implementing the method according to the invention.
(FR)
L'invention concerne un procédé de mesure du spectre de rayonnement lumineux isotrope d'un gaz excité par une lumière laser, faisant intervenir un appareil comprenant au moins une chambre de mesure transparente (41), et effectuant les étapes suivantes consistant : A. à amener ledit gaz à passer dans ladite ou lesdites chambres de mesure (41) ; B. à envoyer un faisceau laser (21) sur ledit gaz dans ladite ou lesdites chambres (41) ; le procédé étant caractérisé en ce qu'il utilise une sphère d'intégration (42) enfermant sensiblement ladite ou lesdites chambres de mesure (41), ainsi qu'un ou plusieurs photodétecteurs permettant de mesurer le signal lumineux collecté par la sphère d'intégration, une étape de calibrage A0 étant effectuée avant l'étape A et en ce que, après l'étape B, on effectue les étapes supplémentaires suivantes consistant : C. à collecter la lumière diffusée par ledit gaz frappé par ledit faisceau laser (21), au moyen de ladite sphère d'intégration (42), obtenant ainsi un signal lumineux de mesure ; D. à transformer le signal lumineux de mesure en un signal électrique au moyen de photodétecteurs appropriés ; E. à analyser ledit signal électrique de façon à obtenir la mesure du spectre de gaz. L'invention concerne en outre un appareil de mesure mettant en œuvre le procédé selon l'invention.
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