JPS6449939A - Optical density measuring instrument - Google Patents

Optical density measuring instrument

Info

Publication number
JPS6449939A
JPS6449939A JP20679887A JP20679887A JPS6449939A JP S6449939 A JPS6449939 A JP S6449939A JP 20679887 A JP20679887 A JP 20679887A JP 20679887 A JP20679887 A JP 20679887A JP S6449939 A JPS6449939 A JP S6449939A
Authority
JP
Japan
Prior art keywords
base board
movable arm
measurement accuracy
light receiving
light
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.)
Granted
Application number
JP20679887A
Other languages
Japanese (ja)
Other versions
JP2595981B2 (en
Inventor
Akio Yamanishi
Takao Sakai
Hitoshi Kamezawa
Sadafusa Tsuji
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 JP20679887A priority Critical patent/JP2595981B2/en
Priority to US07/227,999 priority patent/US4986665A/en
Priority to GB08818568A priority patent/GB2208001A/en
Publication of JPS6449939A publication Critical patent/JPS6449939A/en
Application granted granted Critical
Publication of JP2595981B2 publication Critical patent/JP2595981B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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 improve the measurement accuracy of the titled optical density measuring instrument wherein its measurement part is freely opened and closed by providing said opening and closing structure part with a positioning member which holds the gap between a light emission part and a light reception part constant. CONSTITUTION:A light receiving element 6 is provided to a main-body side base board part 4 and a movable arm part 2 formed freely rotatably on the base board part 4 is provided with a stopper member 4a. This stopper member 4a determines the clipping position of a sample leaf by the movable arm part 2 to hold the distance between the light emitting element 5 and light receiving element 6 constant. Consequently, when the sample leaf is clipped between the base board part 4 and movable arm part 2, the distance between the light emitting and light receiving elements can be held constant, so variance in the measurement accuracy is reduced effectively and the measurement accuracy is improved.
JP20679887A 1987-08-06 1987-08-20 Optical densitometer Expired - Lifetime JP2595981B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP20679887A JP2595981B2 (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
JP20679887A JP2595981B2 (en) 1987-08-20 1987-08-20 Optical densitometer

Publications (2)

Publication Number Publication Date
JPS6449939A true JPS6449939A (en) 1989-02-27
JP2595981B2 JP2595981B2 (en) 1997-04-02

Family

ID=16529272

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20679887A Expired - Lifetime JP2595981B2 (en) 1987-08-06 1987-08-20 Optical densitometer

Country Status (1)

Country Link
JP (1) JP2595981B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100643816B1 (en) * 2004-07-08 2006-11-13 가부시끼가이샤 와이이씨 솔루션즈 Colorimetry device
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5129886U (en) * 1974-08-28 1976-03-04
JPS5494386A (en) * 1978-01-09 1979-07-26 Oki Electric Ind Co Ltd Measuring apparatus for quantity of transmitted light of sheet object
JPS6016567A (en) * 1983-07-06 1985-01-28 Ikari Shokuhin:Kk Seasoned bean curd jelly
JPS6093946A (en) * 1983-10-28 1985-05-25 Minolta Camera Co Ltd Small chlorophyl meter
JPS611155U (en) * 1984-06-08 1986-01-07 横河電機株式会社 Device for measuring physical properties of sheet-like objects

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5129886U (en) * 1974-08-28 1976-03-04
JPS5494386A (en) * 1978-01-09 1979-07-26 Oki Electric Ind Co Ltd Measuring apparatus for quantity of transmitted light of sheet object
JPS6016567A (en) * 1983-07-06 1985-01-28 Ikari Shokuhin:Kk Seasoned bean curd jelly
JPS6093946A (en) * 1983-10-28 1985-05-25 Minolta Camera Co Ltd Small chlorophyl meter
JPS611155U (en) * 1984-06-08 1986-01-07 横河電機株式会社 Device for measuring physical properties of sheet-like objects

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100643816B1 (en) * 2004-07-08 2006-11-13 가부시끼가이샤 와이이씨 솔루션즈 Colorimetry device
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

Also Published As

Publication number Publication date
JP2595981B2 (en) 1997-04-02

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