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WO2007104925A3 - Optical transmissometer and light source and light detector for such optical transmissometer - Google Patents

Optical transmissometer and light source and light detector for such optical transmissometer Download PDF

Info

Publication number
WO2007104925A3
WO2007104925A3 PCT/GB2007/000796 GB2007000796W WO2007104925A3 WO 2007104925 A3 WO2007104925 A3 WO 2007104925A3 GB 2007000796 W GB2007000796 W GB 2007000796W WO 2007104925 A3 WO2007104925 A3 WO 2007104925A3
Authority
WO
WIPO (PCT)
Prior art keywords
transmissometer
light
optical
light source
optical transmissometer
Prior art date
Application number
PCT/GB2007/000796
Other languages
French (fr)
Other versions
WO2007104925A2 (en
Inventor
Gallou Rolandn Le
Original Assignee
Univ Durham
Gallou Rolandn Le
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.)
Filing date
Publication date
Application filed by Univ Durham, Gallou Rolandn Le filed Critical Univ Durham
Publication of WO2007104925A2 publication Critical patent/WO2007104925A2/en
Publication of WO2007104925A3 publication Critical patent/WO2007104925A3/en

Links

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
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
    • G01N21/538—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke for determining atmospheric attenuation and visibility
    • 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
    • G01N21/59—Transmissivity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/062—LED's

Landscapes

  • 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 Analysing Materials By Optical Means (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

A transmissometer for determining of a light beam (2) in the atmosphere is disclosed. The transmissometer comprises a light source (4) including light emitting diodes (LED) controlled by a printed circuit board, and a light detector (6) for providing output signals representing an input optical signal.
PCT/GB2007/000796 2006-03-11 2007-03-07 Optical transmissometer and light source and light detector for such optical transmissometer WO2007104925A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0604990.2 2006-03-11
GB0604990A GB0604990D0 (en) 2006-03-11 2006-03-11 Optical transmissometer and light source and light detector for such optical transmissometer

Publications (2)

Publication Number Publication Date
WO2007104925A2 WO2007104925A2 (en) 2007-09-20
WO2007104925A3 true WO2007104925A3 (en) 2007-12-06

Family

ID=36241489

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2007/000796 WO2007104925A2 (en) 2006-03-11 2007-03-07 Optical transmissometer and light source and light detector for such optical transmissometer

Country Status (3)

Country Link
CN (1) CN101400988A (en)
GB (1) GB0604990D0 (en)
WO (1) WO2007104925A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008006146B4 (en) * 2008-01-26 2009-12-10 Sick Maihak Gmbh Visual haze measurement in a surveillance area
EP2487480B1 (en) * 2011-02-09 2014-01-15 ABB Technology AG Optical sensor element and optical sample analysing apparatus

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6269147A (en) * 1985-09-20 1987-03-30 Nichibei Denshi Kk Measuring method for visibility
FR2745915A1 (en) * 1996-03-07 1997-09-12 Com 1 Fog detection device for automotive applications
US5771484A (en) * 1996-02-28 1998-06-23 Sun Microsystems, Inc. Automated positive control traffic system for weather
WO1998034097A1 (en) * 1997-01-31 1998-08-06 University College London Determination of the ratio of absorption coefficients at different wavelengths in a scattering medium
EP1300672A1 (en) * 2001-10-08 2003-04-09 Almos Systems PTY Limited Improvements in transmission measuring apparatuses
US20030174332A1 (en) * 1999-03-12 2003-09-18 Regents Of The University Of Minnesota Video camera-based visibility measurement system
GB2410795A (en) * 2004-02-09 2005-08-10 Vaisala Gmbh Measurement of atmospheric transmission and determination of visual range
EP1596185A1 (en) * 2004-05-10 2005-11-16 C.R.F. Società Consortile per Azioni Visibility measuring system and method

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6269147A (en) * 1985-09-20 1987-03-30 Nichibei Denshi Kk Measuring method for visibility
US5771484A (en) * 1996-02-28 1998-06-23 Sun Microsystems, Inc. Automated positive control traffic system for weather
FR2745915A1 (en) * 1996-03-07 1997-09-12 Com 1 Fog detection device for automotive applications
WO1998034097A1 (en) * 1997-01-31 1998-08-06 University College London Determination of the ratio of absorption coefficients at different wavelengths in a scattering medium
US20030174332A1 (en) * 1999-03-12 2003-09-18 Regents Of The University Of Minnesota Video camera-based visibility measurement system
EP1300672A1 (en) * 2001-10-08 2003-04-09 Almos Systems PTY Limited Improvements in transmission measuring apparatuses
GB2410795A (en) * 2004-02-09 2005-08-10 Vaisala Gmbh Measurement of atmospheric transmission and determination of visual range
EP1596185A1 (en) * 2004-05-10 2005-11-16 C.R.F. Società Consortile per Azioni Visibility measuring system and method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
VAISALA: "Vaisala Transmissometer LT31", December 2004 (2004-12-01), Helsinki, Finland, pages 1 - 4, XP002450715, Retrieved from the Internet <URL:http://www.vaisala.com/weather/products/weatherinstruments/visibility/lt31/product%20documentation/brochures/lt31%20brochure%20in%20english.pdf?SectionUri=%2fweather%2fproducts%2fweatherinstruments%2fvisibility%2flt31%2fproduct%2520documentation&TabDoc=open> [retrieved on 20070912] *

Also Published As

Publication number Publication date
GB0604990D0 (en) 2006-04-19
WO2007104925A2 (en) 2007-09-20
CN101400988A (en) 2009-04-01

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