JPS56147275A - Manual subscanning type reader - Google Patents

Manual subscanning type reader

Info

Publication number
JPS56147275A
JPS56147275A JP5010180A JP5010180A JPS56147275A JP S56147275 A JPS56147275 A JP S56147275A JP 5010180 A JP5010180 A JP 5010180A JP 5010180 A JP5010180 A JP 5010180A JP S56147275 A JPS56147275 A JP S56147275A
Authority
JP
Japan
Prior art keywords
subscanning
voltage
fvc
converter
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.)
Granted
Application number
JP5010180A
Other languages
Japanese (ja)
Other versions
JPS6364935B2 (en
Inventor
Yojiro Sato
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP5010180A priority Critical patent/JPS56147275A/en
Publication of JPS56147275A publication Critical patent/JPS56147275A/en
Publication of JPS6364935B2 publication Critical patent/JPS6364935B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Character Input (AREA)
  • Image Input (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To obtain a good-quality binary signal, by converting pulses from the movement quantity detecting circuit, which generates pulses of a repeat frequency corresponding to the subscanning speed, to a voltage by the frequency-voltage converter and by controlling the light quantity of the light source in accordance with the subscanning speed. CONSTITUTION:Each time the movement distance of the device in the subscanning direction reaches a prescribed value, the pulse generated from movement quantity detecting circuit DS is given to frequency-voltage converter FVC and is converted to a voltage corresponding to the repeat frequency of pulses generated from detecting circuit DS by converter FVC and is given to light quantity control circuit PVC of light source L for illumination of the original. The repeat frequency of the said pulses is proportional to the subscanning speed, and consequently, the voltage proportional to the subscanning speed is output from coverter FVC. When the output voltage from converter FVC is given to light quantity control circuit PVC, the light quantity of light source L is so controlled that the output voltage of converter FVC increase or reduces the light quantity of light source L in accordance with the subscanning speed.
JP5010180A 1980-04-15 1980-04-15 Manual subscanning type reader Granted JPS56147275A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5010180A JPS56147275A (en) 1980-04-15 1980-04-15 Manual subscanning type reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5010180A JPS56147275A (en) 1980-04-15 1980-04-15 Manual subscanning type reader

Publications (2)

Publication Number Publication Date
JPS56147275A true JPS56147275A (en) 1981-11-16
JPS6364935B2 JPS6364935B2 (en) 1988-12-14

Family

ID=12849677

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5010180A Granted JPS56147275A (en) 1980-04-15 1980-04-15 Manual subscanning type reader

Country Status (1)

Country Link
JP (1) JPS56147275A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60254283A (en) * 1984-05-30 1985-12-14 Tokyo Erekutoron Kk Pattern reader
JPS61133765A (en) * 1984-12-03 1986-06-21 Minolta Camera Co Ltd Image reader
JPS61181261A (en) * 1985-02-06 1986-08-13 Matsushita Electric Ind Co Ltd Picture input device
JPS6372264A (en) * 1986-09-12 1988-04-01 Fuji Photo Film Co Ltd Scanning fluctuation correcting method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5228227A (en) * 1975-08-28 1977-03-03 Mitsubishi Electric Corp Information editing unit
JPS5455317A (en) * 1977-10-13 1979-05-02 Ricoh Co Ltd Control system for quantity of light of pickup unit
JPS54179017U (en) * 1978-06-07 1979-12-18

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5228227A (en) * 1975-08-28 1977-03-03 Mitsubishi Electric Corp Information editing unit
JPS5455317A (en) * 1977-10-13 1979-05-02 Ricoh Co Ltd Control system for quantity of light of pickup unit
JPS54179017U (en) * 1978-06-07 1979-12-18

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60254283A (en) * 1984-05-30 1985-12-14 Tokyo Erekutoron Kk Pattern reader
JPH0521272B2 (en) * 1984-05-30 1993-03-23 Tokyo Electron Ltd
JPS61133765A (en) * 1984-12-03 1986-06-21 Minolta Camera Co Ltd Image reader
JPS61181261A (en) * 1985-02-06 1986-08-13 Matsushita Electric Ind Co Ltd Picture input device
JPS6372264A (en) * 1986-09-12 1988-04-01 Fuji Photo Film Co Ltd Scanning fluctuation correcting method

Also Published As

Publication number Publication date
JPS6364935B2 (en) 1988-12-14

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