JPS5721161A - Manual sub-scanning type reader - Google Patents

Manual sub-scanning type reader

Info

Publication number
JPS5721161A
JPS5721161A JP9582480A JP9582480A JPS5721161A JP S5721161 A JPS5721161 A JP S5721161A JP 9582480 A JP9582480 A JP 9582480A JP 9582480 A JP9582480 A JP 9582480A JP S5721161 A JPS5721161 A JP S5721161A
Authority
JP
Japan
Prior art keywords
light source
sub
source drive
scanning
light
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
JP9582480A
Other languages
Japanese (ja)
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 JP9582480A priority Critical patent/JPS5721161A/en
Publication of JPS5721161A publication Critical patent/JPS5721161A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
    • G06K7/10851—Circuits for pulse shaping, amplifying, eliminating noise signals, checking the function of the sensing device

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Image Input (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To output binary signal in excellent manner through a simple operation at all times independently of the mode of sub-scanning speed, by detecting a light source drive pulse from a timing pulse generator and providing a light source drive circuit controlling the amount of light of the light source. CONSTITUTION:A peak value of a video signal read out every readout period of a line image sensor IS is stored in a peak hold circuit PH, and the peak value is renewed every readout period with the timing from a timing pulse generator TPGa. A moving amount detecting circuit DS which detects the relative moving distance toward the sub-scanning direction of the sensor IS and the original is connected, and a light source drive circuit LD controlling the light amount of the light source L with light source drive pulse Pp from the generator TPGa is connected. Further, every time when moving distance of a reader at sub-scanning direction reaches a predetermined value, the light source L is driven with pulses of a given pulse width and excellent binary signal can be outputted from a comparator COMP independently of the mode of sub-scanning at all times.
JP9582480A 1980-07-14 1980-07-14 Manual sub-scanning type reader Pending JPS5721161A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9582480A JPS5721161A (en) 1980-07-14 1980-07-14 Manual sub-scanning type reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9582480A JPS5721161A (en) 1980-07-14 1980-07-14 Manual sub-scanning type reader

Publications (1)

Publication Number Publication Date
JPS5721161A true JPS5721161A (en) 1982-02-03

Family

ID=14148149

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9582480A Pending JPS5721161A (en) 1980-07-14 1980-07-14 Manual sub-scanning type reader

Country Status (1)

Country Link
JP (1) JPS5721161A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60157A (en) * 1983-06-15 1985-01-05 Canon Inc image input device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60157A (en) * 1983-06-15 1985-01-05 Canon Inc image input device

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