GB522028A - Method and apparatus for measuring the colour of light - Google Patents

Method and apparatus for measuring the colour of light

Info

Publication number
GB522028A
GB522028A GB35150/38A GB3515038A GB522028A GB 522028 A GB522028 A GB 522028A GB 35150/38 A GB35150/38 A GB 35150/38A GB 3515038 A GB3515038 A GB 3515038A GB 522028 A GB522028 A GB 522028A
Authority
GB
United Kingdom
Prior art keywords
light
photo
quotient
meters
dec
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
GB35150/38A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Publication of GB522028A publication Critical patent/GB522028A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • 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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/51—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters
    • 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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/51—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters
    • G01J3/513—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters having fixed filter-detector pairs

Abstract

522,028. Photo-electric colorimeters. I. G. FARBENINDUSTRIE AKT.-GES. Dec. 2, 1938, No. 35150. Convention date, Dec. 4, 1937. [Class 40 (iii)] The ratio of the intensities of two spectral regions of a light is measured by two photocells connected to an instrument adapted to measure the quotient of two electric currents, which photo-cells are sensitive or made sensitive by the interposition of filters to the two spectral regions respectively. As shown in Fig. 1, light from a lamp 1 passes in three separate beams through a red filter 5, a yellowish-green filter 6 and a blue filter 7 to photo-cells 2, 3, 4, the output of which are connected in pairs to two quotient-meters 8, 9. As shown in Fig. 3, these meters 8, 9, are arranged with the axes of their pointers at two corners of an equilateral triangle, so that the point W of intersection of the two pointers indicate the colour of the light, which may be read on in conjunction with the various lines shown on the triangular diagrams.
GB35150/38A 1937-12-05 1938-12-02 Method and apparatus for measuring the colour of light Expired GB522028A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI59807D DE707669C (en) 1937-12-05 1937-12-05 Device for measuring the color of lighting

Publications (1)

Publication Number Publication Date
GB522028A true GB522028A (en) 1940-06-06

Family

ID=7195099

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35150/38A Expired GB522028A (en) 1937-12-05 1938-12-02 Method and apparatus for measuring the colour of light

Country Status (2)

Country Link
DE (1) DE707669C (en)
GB (1) GB522028A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973118A (en) * 1975-03-25 1976-08-03 Lamontagne Joseph Alfred Electro-optical detector array and spectrum analyzer system
US4345840A (en) 1980-04-08 1982-08-24 California Institute Of Technology Method and apparatus for instantaneous band ratioing in a reflectance radiometer
GB2345540A (en) * 1999-01-07 2000-07-12 Infrared Integrated Syst Ltd Multiple filter based detector array

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2832257A (en) * 1951-01-18 1958-04-29 Henry A Gardner Lab Inc Exposure head for photoelectric colorimeters
DE964728C (en) * 1951-03-21 1957-05-29 Bernhard Deltschaft Fa Measuring device for determining the color temperature of light sources with a discontinuous spectrum

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973118A (en) * 1975-03-25 1976-08-03 Lamontagne Joseph Alfred Electro-optical detector array and spectrum analyzer system
US4345840A (en) 1980-04-08 1982-08-24 California Institute Of Technology Method and apparatus for instantaneous band ratioing in a reflectance radiometer
GB2345540A (en) * 1999-01-07 2000-07-12 Infrared Integrated Syst Ltd Multiple filter based detector array
GB2345540B (en) * 1999-01-07 2001-03-21 Infrared Integrated Syst Ltd Spectrometer/spectrophotometer using multiple filter based detector array

Also Published As

Publication number Publication date
DE707669C (en) 1941-06-30

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