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JPS57165724A - Color discriminating element - Google Patents

Color discriminating element

Info

Publication number
JPS57165724A
JPS57165724AJP56050146AJP5014681AJPS57165724AJP S57165724 AJPS57165724 AJP S57165724AJP 56050146 AJP56050146 AJP 56050146AJP 5014681 AJP5014681 AJP 5014681AJP S57165724 AJPS57165724 AJP S57165724A
Authority
JP
Japan
Prior art keywords
light receiving
light
ratio
primary color
areas
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
JP56050146A
Other languages
Japanese (ja)
Inventor
Masakatsu Kurita
Naotake Nagao
Koji Morishita
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
Tateisi Electronics Co
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 Tateisi Electronics Co, Omron Tateisi Electronics CofiledCriticalTateisi Electronics Co
Priority to JP56050146ApriorityCriticalpatent/JPS57165724A/en
Publication of JPS57165724ApublicationCriticalpatent/JPS57165724A/en
Pendinglegal-statusCriticalCurrent

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Abstract

PURPOSE:To improve space resolution, by differentiating the light receiving areas of a photoelectric transducing part, compensating the difference between light receiving sensitivities for three primary color light beams, and obtaining the optical currents having the values corresponding to the component ratio of the three primary color light beams in the light to be detected. CONSTITUTION:The light receiving areas of the light receiving elements 7r, 7b, and 7g of the light discriminating element 5' are different to each other. The light receiving area Sb of the light receiving element 7b for a blue color is set to be sufficiently larger than the light receiving areas Sg and Sr of the other elements 7g and 7r, and the area Sg is set to be larger than the Sr. Therefore the ratio of the areas Sb, Sg, and Sr are set so that the ratio is inversely proportional to the light receiving sensitivities to the three primary color light beams. The ratio of the optical current Ib, Ig, and Ir flowing the elements 7b, 7g, and 7r approximately corresponds to the ratio of the components of the three primary color light beams in the light to be detected.
JP56050146A1981-04-031981-04-03Color discriminating elementPendingJPS57165724A (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
JP56050146AJPS57165724A (en)1981-04-031981-04-03Color discriminating element

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP56050146AJPS57165724A (en)1981-04-031981-04-03Color discriminating element

Publications (1)

Publication NumberPublication Date
JPS57165724Atrue JPS57165724A (en)1982-10-12

Family

ID=12851030

Family Applications (1)

Application NumberTitlePriority DateFiling Date
JP56050146APendingJPS57165724A (en)1981-04-031981-04-03Color discriminating element

Country Status (1)

CountryLink
JP (1)JPS57165724A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS6182123A (en)*1984-09-281986-04-25Yamatake Honeywell Co Ltd color detection device
JPH01219641A (en)*1988-02-291989-09-01Yamatake Honeywell Co LtdColor detection element
JPH05322658A (en)*1992-05-211993-12-07Sharp CorpColor densitometer
JP2011511946A (en)*2008-02-132011-04-14ヒューレット−パッカード デベロップメント カンパニー エル．ピー． COLOR DETECTOR HAVING OPTICAL DETECTOR WITH ENLARGED AREA
JP2014172359A (en)*2013-03-122014-09-22Sumitomo Heavy Ind LtdLight detection element, mark sensor, and method for determining mark by light detection element

Citations (1)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS51145384A (en)*1975-06-101976-12-14Toshiba CorpColor tone detector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS51145384A (en)*1975-06-101976-12-14Toshiba CorpColor tone detector

Cited By (6)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS6182123A (en)*1984-09-281986-04-25Yamatake Honeywell Co Ltd color detection device
JPH01219641A (en)*1988-02-291989-09-01Yamatake Honeywell Co LtdColor detection element
JPH05322658A (en)*1992-05-211993-12-07Sharp CorpColor densitometer
JP2011511946A (en)*2008-02-132011-04-14ヒューレット−パッカード デベロップメント カンパニー エル．ピー． COLOR DETECTOR HAVING OPTICAL DETECTOR WITH ENLARGED AREA
US8319969B2 (en)2008-02-132012-11-27Hewlett-Packard Development Company, L.P.Color detector having area scaled photodetectors
JP2014172359A (en)*2013-03-122014-09-22Sumitomo Heavy Ind LtdLight detection element, mark sensor, and method for determining mark by light detection element

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