FR2402197A1 - Reference colour recognition device - has filters to select reference colour and compare intensity with preset level - Google Patents

Reference colour recognition device - has filters to select reference colour and compare intensity with preset level

Info

Publication number
FR2402197A1
FR2402197A1 FR7726682A FR7726682A FR2402197A1 FR 2402197 A1 FR2402197 A1 FR 2402197A1 FR 7726682 A FR7726682 A FR 7726682A FR 7726682 A FR7726682 A FR 7726682A FR 2402197 A1 FR2402197 A1 FR 2402197A1
Authority
FR
France
Prior art keywords
reference colour
filters
recognition device
preset level
colour
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
FR7726682A
Other languages
French (fr)
Other versions
FR2402197B1 (en
Inventor
Gaetan Pleyber
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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 Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Priority to FR7726682A priority Critical patent/FR2402197A1/en
Publication of FR2402197A1 publication Critical patent/FR2402197A1/en
Application granted granted Critical
Publication of FR2402197B1 publication Critical patent/FR2402197B1/fr
Granted 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectrometry And Color Measurement (AREA)

Abstract

The colour recognition device for detecting a reference colour in colour printing, or detecting coloured indicators uses a filtering method. The first optical filter (F1) receives the light emitted by the object and has a transmission band in the wavelength of interest. A second optical filter (F2) selects a band not including the wavelength of interest. Detectors (C1, C2) measure the two outputs from these filters, and the difference between them is found. The difference signal is then compared with a present value to determine the presence of the reference colour of light.
FR7726682A 1977-09-02 1977-09-02 Reference colour recognition device - has filters to select reference colour and compare intensity with preset level Granted FR2402197A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7726682A FR2402197A1 (en) 1977-09-02 1977-09-02 Reference colour recognition device - has filters to select reference colour and compare intensity with preset level

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7726682A FR2402197A1 (en) 1977-09-02 1977-09-02 Reference colour recognition device - has filters to select reference colour and compare intensity with preset level

Publications (2)

Publication Number Publication Date
FR2402197A1 true FR2402197A1 (en) 1979-03-30
FR2402197B1 FR2402197B1 (en) 1980-08-01

Family

ID=9194989

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7726682A Granted FR2402197A1 (en) 1977-09-02 1977-09-02 Reference colour recognition device - has filters to select reference colour and compare intensity with preset level

Country Status (1)

Country Link
FR (1) FR2402197A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2162529A (en) * 1936-03-12 1939-06-13 Westinghouse Electric & Mfg Co Photosensitive apparatus
US2267319A (en) * 1940-06-10 1941-12-23 Benning Wilbert Orville Color grading apparatus
US3513320A (en) * 1966-10-31 1970-05-19 Markstems Inc Article identification system detecting plurality of colors disposed on article
FR2028482A1 (en) * 1969-01-16 1970-10-09 Sick Erwin Fa
US3670169A (en) * 1970-08-18 1972-06-13 Postmaster General Usa Color gradient detector device
US3894217A (en) * 1973-12-27 1975-07-08 Nippon Electric Co Device for discriminating color coded articles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2162529A (en) * 1936-03-12 1939-06-13 Westinghouse Electric & Mfg Co Photosensitive apparatus
US2267319A (en) * 1940-06-10 1941-12-23 Benning Wilbert Orville Color grading apparatus
US3513320A (en) * 1966-10-31 1970-05-19 Markstems Inc Article identification system detecting plurality of colors disposed on article
FR2028482A1 (en) * 1969-01-16 1970-10-09 Sick Erwin Fa
US3670169A (en) * 1970-08-18 1972-06-13 Postmaster General Usa Color gradient detector device
US3894217A (en) * 1973-12-27 1975-07-08 Nippon Electric Co Device for discriminating color coded articles

Also Published As

Publication number Publication date
FR2402197B1 (en) 1980-08-01

Similar Documents

Publication Publication Date Title
JPS5535214A (en) Method and device for film-thickness measurement making use of infrared-ray interference
ES8205312A1 (en) Photometric apparatus and method.
EP0019478A3 (en) Apparatus and method for indicating a colour change of an object
GB2010474A (en) Gem colour meter
GB1396564A (en) Methods of and apparatus for infrared gas analysis
SE7908324L (en) PROCEDURE AND DEVICE FOR OPTICAL SEPARATION OF PROVOBS
JPS5478191A (en) Detecting method of defect of rice grains
FR2402197A1 (en) Reference colour recognition device - has filters to select reference colour and compare intensity with preset level
DE3279628D1 (en) Procedure for the production of a humidity-sensitive interference mirror, and procedure and equipment for the measurement of the humidity using said mirror
GB999623A (en) Sensing head of optical temperature measuring apparatus
JPS56164941A (en) Color tone discriminator
JPS56143947A (en) Measuring device of transmittance for smoke
JPS5646436A (en) Temperature detector
JPS5428680A (en) Blood detecting apparatus in blood dialyzers
JPS57196137A (en) Measuring device for photo luminescence intensity
JPS56151312A (en) Alarm indication in process measuring device
JPS56101505A (en) Optical measurement device
JPS57114836A (en) Measuring apparatus for wavelength chracteristic of optical fiber
GB1001104A (en) Improvements relating to apparatus for examining plasmas
JPS5612520A (en) Fourier spectral method
JPS5423587A (en) Consistent photometric and colorimetric method of measuring objects
JPS5488176A (en) Photo detector
JPS54130185A (en) Total raman light monitoring method and apparatus
JPS5733342A (en) Spectrophotometer
JPS5654319A (en) Optical detector

Legal Events

Date Code Title Description
ST Notification of lapse