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JPS5643521A - Color discriminating photoelectric detector - Google Patents

Color discriminating photoelectric detector

Info

Publication number
JPS5643521A
JPS5643521A JP11990079A JP11990079A JPS5643521A JP S5643521 A JPS5643521 A JP S5643521A JP 11990079 A JP11990079 A JP 11990079A JP 11990079 A JP11990079 A JP 11990079A JP S5643521 A JPS5643521 A JP S5643521A
Authority
JP
Japan
Prior art keywords
signal
output
circuit
level difference
produced
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
JP11990079A
Other languages
Japanese (ja)
Inventor
Fumiaki Sai
Seiji Oku
Masaru Sakamoto
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.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP11990079A priority Critical patent/JPS5643521A/en
Publication of JPS5643521A publication Critical patent/JPS5643521A/en
Pending 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
    • G01J2003/466—Coded colour; Recognition of predetermined colour; Determining proximity to predetermined colour
    • 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
    • G01J3/501—Colorimeters using spectrally-selective light sources, e.g. LEDs

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

PURPOSE:To perform color discrimination by use of a simple circuit, by generating a differential output when there is a level difference of color component in a reflected light photodetecting signal of the body to be detected, and performing color discrimination by use of said differential output. CONSTITUTION:A signal C which has been reflected by the body 4 to be detected, has made incidence to the photodetector 5 and has passed through the amplifying circuit 6 consists of consecutive red and green components, and when the body 4 is red, the green component level is low and a level difference is produced. When this level difference has been produced, an output is generated from the differentiating circuit 11. This output is included in the period of a pulse signal (b). On the other hand, a differential output which is generated at the rise and breaking parts of an output signal (e) containing both colors of the circuit 6 is excluded from the range of the pulse width. Accordingly, only the differential output in case when the level difference has been produced can be taken out by giving the gate to an output signal (d) of the circuit 11 by the signal (b), and a signal (f) showing that the body 4 is red can be obtained by making the signal (e) obtained as mentioned above through the output circuit 10.
JP11990079A 1979-09-18 1979-09-18 Color discriminating photoelectric detector Pending JPS5643521A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11990079A JPS5643521A (en) 1979-09-18 1979-09-18 Color discriminating photoelectric detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11990079A JPS5643521A (en) 1979-09-18 1979-09-18 Color discriminating photoelectric detector

Publications (1)

Publication Number Publication Date
JPS5643521A true JPS5643521A (en) 1981-04-22

Family

ID=14772994

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11990079A Pending JPS5643521A (en) 1979-09-18 1979-09-18 Color discriminating photoelectric detector

Country Status (1)

Country Link
JP (1) JPS5643521A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5994021A (en) * 1982-11-22 1984-05-30 Hitachi Maxell Ltd Color sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5994021A (en) * 1982-11-22 1984-05-30 Hitachi Maxell Ltd Color sensor

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