JPS6449937A - Optical densitometer - Google Patents

Optical densitometer

Info

Publication number
JPS6449937A
JPS6449937A JP20679587A JP20679587A JPS6449937A JP S6449937 A JPS6449937 A JP S6449937A JP 20679587 A JP20679587 A JP 20679587A JP 20679587 A JP20679587 A JP 20679587A JP S6449937 A JPS6449937 A JP S6449937A
Authority
JP
Japan
Prior art keywords
temperature
sample
measured
measurement
light sources
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
JP20679587A
Other languages
Japanese (ja)
Inventor
Takao Sakai
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 JP20679587A priority Critical patent/JPS6449937A/en
Priority to US07/227,999 priority patent/US4986665A/en
Priority to GB08818568A priority patent/GB2208001A/en
Publication of JPS6449937A publication Critical patent/JPS6449937A/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

Abstract

PURPOSE:To take a measurement efficiently with high accuracy by measuring the temperature of light sources and a photodetection part or their ambient temperature and correcting a measured value with the measured temperature. CONSTITUTION:A temperature measuring circuit 23 measures the temperature of the light sources 4 and 5 and photodetection part 6 or their ambient temperature when calibration is performed while a sample is not inserted and when density measuring operation is performed while the sample is inserted. Further, a storage means 26 is stored with information regarding the temperature measurement such as the light emission quantities, peak wavelengths, and photodetection output of the light sources 4 and 5 and photodetecting means 6. A control arithmetic circuit 21 corrects measured values at the time of calibration and measurement which are inputted from the photodetection part 6 according to said temperature. Namely, said measured values are corrected into measured values of reference temperature according to said measured temperature value and stored information. Then a specific component, e.g. chlorophyll in a sample leaf is calculated from the quantity of incident light and the quantity of light transmitted through the sample leaf which are corrected with the temperature.
JP20679587A 1987-08-06 1987-08-20 Optical densitometer Pending JPS6449937A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP20679587A JPS6449937A (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
JP20679587A JPS6449937A (en) 1987-08-20 1987-08-20 Optical densitometer

Publications (1)

Publication Number Publication Date
JPS6449937A true JPS6449937A (en) 1989-02-27

Family

ID=16529224

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20679587A Pending JPS6449937A (en) 1987-08-06 1987-08-20 Optical densitometer

Country Status (1)

Country Link
JP (1) JPS6449937A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0643095A (en) * 1992-07-27 1994-02-18 Iseki & Co Ltd Near-infrared analyzer
JP2002202254A (en) * 2000-10-30 2002-07-19 Dkk Toa Corp Light measuring method and device therefor
FR2918458A1 (en) * 2007-07-06 2009-01-09 Univ Toulouse Le Mirail DEVICE FOR NON-DESTRUCTIVE MEASUREMENT OF MOISTURIZATION OF A PLANT IN ITS NATURAL ENVIRONMENT
JP2010190909A (en) * 2003-08-13 2010-09-02 Luminex Corp Method for controlling one or more parameters of flow cytometer type measurement system
GB2475277A (en) * 2009-11-12 2011-05-18 Bah Holdings Llc Optical absorption gas analyser with temperature sensor
JP2013541019A (en) * 2010-11-01 2013-11-07 ガス・センシング・ソリューションズ・リミテッド Temperature-absorbing gas sensor temperature calibration method and apparatus, and light-absorbing gas sensor calibrated thereby

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0643095A (en) * 1992-07-27 1994-02-18 Iseki & Co Ltd Near-infrared analyzer
JP2002202254A (en) * 2000-10-30 2002-07-19 Dkk Toa Corp Light measuring method and device therefor
JP2010190909A (en) * 2003-08-13 2010-09-02 Luminex Corp Method for controlling one or more parameters of flow cytometer type measurement system
FR2918458A1 (en) * 2007-07-06 2009-01-09 Univ Toulouse Le Mirail DEVICE FOR NON-DESTRUCTIVE MEASUREMENT OF MOISTURIZATION OF A PLANT IN ITS NATURAL ENVIRONMENT
WO2009007269A1 (en) * 2007-07-06 2009-01-15 Universite De Toulouse Ii Le Mirail Optoelectronic device for measuring the hydration of a plant in its natural environment
US8228504B2 (en) 2007-07-06 2012-07-24 Universite De Toulouse Ii Le Mirail Device for optoelectronic measurement of the hydration of a plant in its natural environment
GB2475277A (en) * 2009-11-12 2011-05-18 Bah Holdings Llc Optical absorption gas analyser with temperature sensor
US8665424B2 (en) 2009-11-12 2014-03-04 Bah Holdings Llc Optical absorption gas analyser
JP2013541019A (en) * 2010-11-01 2013-11-07 ガス・センシング・ソリューションズ・リミテッド Temperature-absorbing gas sensor temperature calibration method and apparatus, and light-absorbing gas sensor calibrated thereby

Similar Documents

Publication Publication Date Title
US4124301A (en) Device for measuring light transmitted through a material
SE8007376L (en) OPTICAL METHODS FOR SPECTRAL ANALYSIS
US4921351A (en) Spectrophotometer comprising a xenon flashtube as a light source
ATE112852T1 (en) CALIBRATION DEVICE FOR A NON-DISPERSIVE INFRARED PHOTOMETER.
JPS6449937A (en) Optical densitometer
GB1586565A (en) Photometer
JPS552916A (en) Spectral photometer
JPS56160643A (en) Measuring method for impurity concentration and distribution thereof
JPS5619468A (en) Weather correction device of light-wave distance measuring instrument
US4043676A (en) Photometer
JPS6449935A (en) Optical densitometer
JPS6449934A (en) Optical densitometer
JPS6488373A (en) Optical fiber sensor
JPS56158936A (en) Method for calibration of transmittance meter of smoke and mist
GB2199939A (en) Apparatus for the evaluation of radiophotoluminescence lenses
JPS5769222A (en) Spectrometry
JPS5575636A (en) Analysis unit using internal standard correction method
JPS6425010A (en) Encoder
JPS56145323A (en) Spectrophotometer
JPS55109044A (en) Transmission system for analog optical signal
JPS5619416A (en) Measuring instrument for thermoluminescence
JPS5726719A (en) Measuring circuit for light output of light emitting element
CN2164556Y (en) Directly reading digital micro-quantity water meter
JPS55101847A (en) Infrared gas analyzer
JPS57101732A (en) Method for measuring temperature using raman light