JPS6449934A - Optical densitometer - Google Patents

Optical densitometer

Info

Publication number
JPS6449934A
JPS6449934A JP20679287A JP20679287A JPS6449934A JP S6449934 A JPS6449934 A JP S6449934A JP 20679287 A JP20679287 A JP 20679287A JP 20679287 A JP20679287 A JP 20679287A JP S6449934 A JPS6449934 A JP S6449934A
Authority
JP
Japan
Prior art keywords
light
calibration
sample
measured
proper value
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.)
Pending
Application number
JP20679287A
Other languages
Japanese (ja)
Inventor
Takao Sakai
Akio Yamanishi
Hitoshi Kamezawa
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.)
Minolta Co Ltd
Original Assignee
Minolta Co Ltd
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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP20679287A priority Critical patent/JPS6449934A/en
Priority to US07/227,999 priority patent/US4986665A/en
Priority to GB08818568A priority patent/GB2208001A/en
Publication of JPS6449934A publication Critical patent/JPS6449934A/en
Pending legal-status Critical Current

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
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
    • G01N21/3151—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths using two sources of radiation of different wavelengths
    • 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
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
    • G01N2021/3181—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths using LEDs
    • 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
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N2021/635—Photosynthetic material analysis, e.g. chrorophyll
    • 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
    • G01N21/84—Systems specially adapted for particular applications
    • G01N2021/8466—Investigation of vegetal material, e.g. leaves, plants, fruits
    • 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
    • G01N2201/0621—Supply

Landscapes

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

Abstract

PURPOSE:To preclude following unnecessary measurement due to a failure in preliminarily adjustment and to improve the accuracy and efficiency of measurement by deciding whether or not the quantity of light in a specific wavelength range of a light source is a proper value at the time of calibration and performing the measuring operation only when the quantity of the light is the proper value. CONSTITUTION:When processing is set in calibration mode, a control arithmetic circuit 21 operates light sources 4 and 5 and a photodetecting means 6 while a sample is not inserted or while a filter for calibration is inserted and measures the quantity of the light of the specific wavelength of the light sources 4 and 5. Then the arithmetic circuit 21 decides whether or not the measured quantity of light is within a predetermined proper range. When it is judged that the quantity is the proper value, the control circuit 21 enables following measuring operation and stores the quantity of light measured at the time of calibration in a storage means 26. Then, the quantity of light stored in the storage means 26 and the quantity of sample transmitted light which is measured next are used to calculate the density of a specific substance in the sample, e.g. chlorophyll.
JP20679287A 1987-08-06 1987-08-20 Optical densitometer Pending JPS6449934A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP20679287A JPS6449934A (en) 1987-08-20 1987-08-20 Optical densitometer
US07/227,999 US4986665A (en) 1987-08-06 1988-08-03 Optical density detector
GB08818568A GB2208001A (en) 1987-08-06 1988-08-04 Optical density detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20679287A JPS6449934A (en) 1987-08-20 1987-08-20 Optical densitometer

Publications (1)

Publication Number Publication Date
JPS6449934A true JPS6449934A (en) 1989-02-27

Family

ID=16529172

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20679287A Pending JPS6449934A (en) 1987-08-06 1987-08-20 Optical densitometer

Country Status (1)

Country Link
JP (1) JPS6449934A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009270898A (en) * 2008-05-02 2009-11-19 Sumitomo Electric Ind Ltd Biosensor measuring instrument and sensor system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009270898A (en) * 2008-05-02 2009-11-19 Sumitomo Electric Ind Ltd Biosensor measuring instrument and sensor system

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