JPS5781775A - Image pickup equipment - Google Patents

Image pickup equipment

Info

Publication number
JPS5781775A
JPS5781775A JP55158642A JP15864280A JPS5781775A JP S5781775 A JPS5781775 A JP S5781775A JP 55158642 A JP55158642 A JP 55158642A JP 15864280 A JP15864280 A JP 15864280A JP S5781775 A JPS5781775 A JP S5781775A
Authority
JP
Japan
Prior art keywords
image pickup
output
light
section
light source
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
JP55158642A
Other languages
Japanese (ja)
Inventor
Nobuyoshi Hatori
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.)
Iwatsu Electric Co Ltd
Iwasaki Tsushinki KK
Original Assignee
Iwatsu Electric Co Ltd
Iwasaki Tsushinki KK
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 Iwatsu Electric Co Ltd, Iwasaki Tsushinki KK filed Critical Iwatsu Electric Co Ltd
Priority to JP55158642A priority Critical patent/JPS5781775A/en
Publication of JPS5781775A publication Critical patent/JPS5781775A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/401—Compensating positionally unequal response of the pick-up or reproducing head

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To always obtain image pickup signal of a constant level even when variation in the quantity of light occur in the light source, by compensating the output from the photoelectric conversion section for image pickup or the quantity of light of the light source with the output of the reflected light detecting section. CONSTITUTION:Image pickup is started after an origianl is placed on an original placing table 1 and a fluorescent lamp 3 is turned on. Pictures of the original and reflected light from a reflecting body 2 are absorbed into a photoelectric transducer 5 for image pickup through optical systems 4 and 4', and are outputted from the element 5 after they are photoelectrically converted into image pickup signals. The output from the photoelectric transducer 5 is supplied to an input terminl 6 of an image pickup signal compensating circuit. On the other hand, a control signal is impressed upon a control input terminal 11 and an analog switch SW of a sample holding circuit is closed. Thus a closed loop is formed including a variable amplifying section 8, and the gain of the variable amplifying section 8 is set in such a way that the output voltage which appears at an output terminal 12 becomes the same in level as the comparison voltage VF of a comparison amplifier 9.
JP55158642A 1980-11-11 1980-11-11 Image pickup equipment Pending JPS5781775A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55158642A JPS5781775A (en) 1980-11-11 1980-11-11 Image pickup equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55158642A JPS5781775A (en) 1980-11-11 1980-11-11 Image pickup equipment

Publications (1)

Publication Number Publication Date
JPS5781775A true JPS5781775A (en) 1982-05-21

Family

ID=15676166

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55158642A Pending JPS5781775A (en) 1980-11-11 1980-11-11 Image pickup equipment

Country Status (1)

Country Link
JP (1) JPS5781775A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5913465A (en) * 1982-07-14 1984-01-24 Canon Inc Original reader
JPS5967773A (en) * 1982-10-09 1984-04-17 Canon Inc Original reader
JPS5979676A (en) * 1982-10-27 1984-05-08 Canon Inc Reader for polychromic picture information
JPS59223062A (en) * 1983-06-01 1984-12-14 Canon Inc Picture processing device
JPS60100867A (en) * 1983-09-16 1985-06-04 Nippon Kogaku Kk <Nikon> Picture scanner
JPS6088661U (en) * 1983-11-24 1985-06-18 岩崎通信機株式会社 Imaging device
JPS60124168A (en) * 1983-12-09 1985-07-03 Canon Inc Original reader
JPS60127860A (en) * 1983-12-14 1985-07-08 Fuji Xerox Co Ltd Original reader
JPS61113358A (en) * 1984-11-07 1986-05-31 Fuji Xerox Co Ltd Original reader
JPS6219704A (en) * 1985-07-19 1987-01-28 Hitachi Ltd Sensitivity correcting method for picture signal
JPS6433258U (en) * 1987-08-20 1989-03-01
JPH0321160A (en) * 1990-06-01 1991-01-29 Canon Inc Image reader

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5913465A (en) * 1982-07-14 1984-01-24 Canon Inc Original reader
JPS5967773A (en) * 1982-10-09 1984-04-17 Canon Inc Original reader
JPS5979676A (en) * 1982-10-27 1984-05-08 Canon Inc Reader for polychromic picture information
JPS59223062A (en) * 1983-06-01 1984-12-14 Canon Inc Picture processing device
JPH0527295B2 (en) * 1983-06-01 1993-04-20 Canon Kk
JPS60100867A (en) * 1983-09-16 1985-06-04 Nippon Kogaku Kk <Nikon> Picture scanner
JPH026702Y2 (en) * 1983-11-24 1990-02-19
JPS6088661U (en) * 1983-11-24 1985-06-18 岩崎通信機株式会社 Imaging device
JPS60124168A (en) * 1983-12-09 1985-07-03 Canon Inc Original reader
JPH0528025B2 (en) * 1983-12-09 1993-04-23 Canon Kk
JPS60127860A (en) * 1983-12-14 1985-07-08 Fuji Xerox Co Ltd Original reader
JPS61113358A (en) * 1984-11-07 1986-05-31 Fuji Xerox Co Ltd Original reader
JPS6219704A (en) * 1985-07-19 1987-01-28 Hitachi Ltd Sensitivity correcting method for picture signal
JPH0575046B2 (en) * 1985-07-19 1993-10-19 Hitachi Ltd
JPS6433258U (en) * 1987-08-20 1989-03-01
JPH0321160A (en) * 1990-06-01 1991-01-29 Canon Inc Image reader
JPH0530104B2 (en) * 1990-06-01 1993-05-07 Canon Kk

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