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1. WO2008040875 - DEVICE AND METHOD FOR DETERMINING A LIGHT SIGNAL ADDITIVE TO SUNLIGHT

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Publication Number WO/2008/040875
Publication Date 10.04.2008
International Application No. PCT/FR2007/001603
International Filing Date 02.10.2007
IPC
G01N 21/27 2006.1
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
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
CPC
G01N 2021/635
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
635Photosynthetic material analysis, e.g. chrorophyll
G01N 2021/8466
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
84Systems specially adapted for particular applications
8466Investigation of vegetal material, e.g. leaves, plants, fruits
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 21/31
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
31Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
G01N 21/64
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
G01N 2201/0616
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
2201Features of devices classified in G01N21/00
06Illumination; Optics
061Sources
0616Ambient light is used
Applicants
  • SFERIS [FR]/[FR] (AllExceptUS)
  • CENTRE NATIONAL D'ETUDES DU MACHINISME AGRICOLE, DU GENIE RURAL, DES EAUX ET FORETS [FR]/[FR] (AllExceptUS)
  • ROGER, Jean-Michel [FR]/[FR] (UsOnly)
  • LARCHEVEQUE, Boris, Jérôme [FR]/[FR] (UsOnly)
Inventors
  • ROGER, Jean-Michel
  • LARCHEVEQUE, Boris, Jérôme
Agents
  • PONTET, Bernard
Priority Data
060868604.10.2006FR
Publication Language French (fr)
Filing Language French (FR)
Designated States
Title
(EN) DEVICE AND METHOD FOR DETERMINING A LIGHT SIGNAL ADDITIVE TO SUNLIGHT
(FR) DISPOSITIF ET PROCÉDÉ POUR DÉTERMINER UN SIGNAL LUMINEUX ADDITIF À DE LA LUMIÈRE SOLAIRE
front page image
Abstract
(EN) The invention relates to a method and a device for determining a light signal additive to sunlight. The device according to the invention comprises: means (2) for collecting light coming from an object, the collected light comprising solar light (5) reflected by the object (4) and an additive light signal (6); means (10, 15, 17) for measuring, for at least first and second atmospheric absorption lines, a signal that depends on the intensity of the collected light at a wavelength of the line; means (11) for determining, from the measured signals, a signal that depends on an intensity of the additive signal at a wavelength of the first line. The invention also relates to a method employed in a device according to the invention. The device or the method according to the invention does not require measurement on reference sunlight without the additive signal close to the first line. Application more particularly to the measurement of a fluorescence signal emitted by vegetation.
(FR) L'invention concerne un procédé et un dispositif pour déterminer un signal lumineux additif à de la lumière solaire. Le dispositif selon l'invention comprend des moyens (2) pour collecter de lumière en provenance d'un objet, la lumière collectée comprenant de la lumière solaire réfléchie (5) par l'objet (4), et un signal lumineux additif (6); des moyens pour mesurer (10, 15, 17), pour au moins une première et une deuxième raie d'absorption atmosphérique, un signal qui dépend d'une intensité de la lumière collectée à une longueur d'onde de la raie; des moyens (11) pour déterminer, à partir des signaux mesurés, un signal qui dépend d'une intensité du signal additif à une longueur d'onde de la première raie. L'invention concerne aussi un procédé mis en œuvre dans un dispositif selon l'invention. Le dispositif ou le procédé selon l'invention ne nécessite pas de mesure sur de la lumière solaire de référence dénuée de signal additif au voisinage de la première raie. Application plus particulièrement à la mesure d'un signal de fluorescence émis par de la végétation.
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