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
  • G01N21/534—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke by measuring transmission alone, i.e. determining opacity
• • 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
  • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
  • G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration

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• Physics & Mathematics (AREA)
• Biochemistry (AREA)
• Analytical Chemistry (AREA)
• Pathology (AREA)
• Immunology (AREA)
• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical & Material Sciences (AREA)
• General Physics & Mathematics (AREA)
• General Health & Medical Sciences (AREA)
• Engineering & Computer Science (AREA)
• Mathematical Physics (AREA)
• Spectroscopy & Molecular Physics (AREA)
• Theoretical Computer Science (AREA)
• Investigating Or Analysing Materials By Optical Means (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=9808477

Family Applications (1)

Country Status (6)

Families Citing this family (3)

• 1972
  • 1972-02-09 GB GB610572A patent/GB1425564A/en not_active Expired
• 1973
  • 1973-02-06 US US00330107A patent/US3843266A/en not_active Expired - Lifetime
  • 1973-02-08 NL NL7301813A patent/NL7301813A/xx not_active Application Discontinuation
  • 1973-02-08 FR FR7304547A patent/FR2171801A5/fr not_active Expired
  • 1973-02-09 DE DE2306451A patent/DE2306451A1/de active Pending
  • 1973-02-09 JP JP48016360A patent/JPS4889779A/ja active Pending

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