GB2064760B - Light meter - Google Patents

Light meter

Info

Publication number
GB2064760B
GB2064760B GB8037652A GB8037652A GB2064760B GB 2064760 B GB2064760 B GB 2064760B GB 8037652 A GB8037652 A GB 8037652A GB 8037652 A GB8037652 A GB 8037652A GB 2064760 B GB2064760 B GB 2064760B
Authority
GB
United Kingdom
Prior art keywords
light meter
meter
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.)
Expired
Application number
GB8037652A
Other versions
GB2064760A (en
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.)
Dainippon Screen Manufacturing Co Ltd
Original Assignee
Dainippon Screen Manufacturing 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 Dainippon Screen Manufacturing Co Ltd filed Critical Dainippon Screen Manufacturing Co Ltd
Publication of GB2064760A publication Critical patent/GB2064760A/en
Application granted granted Critical
Publication of GB2064760B publication Critical patent/GB2064760B/en
Expired 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
    • G01N21/27—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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/44—Electric circuits

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
GB8037652A 1979-12-05 1980-11-24 Light meter Expired GB2064760B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15758979A JPS5679946A (en) 1979-12-05 1979-12-05 Optical densitometer

Publications (2)

Publication Number Publication Date
GB2064760A GB2064760A (en) 1981-06-17
GB2064760B true GB2064760B (en) 1984-01-25

Family

ID=15653001

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8037652A Expired GB2064760B (en) 1979-12-05 1980-11-24 Light meter

Country Status (2)

Country Link
JP (1) JPS5679946A (en)
GB (1) GB2064760B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673807A (en) * 1984-10-12 1987-06-16 Dai Nippon Insatso Kabushiki Kaisha Automatic range control method for an optical density/dot percentage measuring device
FR2581492B1 (en) * 1985-05-06 1990-02-23 Inovelf Sa LOGARITHMIC CONVERTERS AND THEIR APPLICATION TO MEASUREMENT OF TRANSMITTED LIGHT
JPS62123553U (en) * 1986-01-28 1987-08-05
JPS62215848A (en) * 1986-03-18 1987-09-22 Hochiki Corp Sensing apparatus
CN102970076B (en) * 2012-11-07 2015-09-09 武汉光迅科技股份有限公司 A kind of photoelectric detective circuit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49114486A (en) * 1973-02-28 1974-10-31

Also Published As

Publication number Publication date
GB2064760A (en) 1981-06-17
JPS5679946A (en) 1981-06-30

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19921124