JPS57136874A - Picture reader - Google Patents

Picture reader

Info

Publication number
JPS57136874A
JPS57136874A JP56022476A JP2247681A JPS57136874A JP S57136874 A JPS57136874 A JP S57136874A JP 56022476 A JP56022476 A JP 56022476A JP 2247681 A JP2247681 A JP 2247681A JP S57136874 A JPS57136874 A JP S57136874A
Authority
JP
Japan
Prior art keywords
scanning
mobile speed
horizontal
response
optical beam
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
JP56022476A
Other languages
Japanese (ja)
Inventor
Mitoo Naemura
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP56022476A priority Critical patent/JPS57136874A/en
Publication of JPS57136874A publication Critical patent/JPS57136874A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/257—Picture signal generators using flying-spot scanners

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Input (AREA)
  • Facsimiles In General (AREA)

Abstract

PURPOSE:To enable to keep the scanning interval constant independently of change in the mobile speed of an object, by detecting the change in the mobile speed of the object and correcting the scanning position of optical beam on the object in response to this detected value. CONSTITUTION:Optical beam scanning is made on the object 6 of a document or a film with optical beam obtained by scanning electron beam on a cathode ray tube 5 in two-dimension at a vertical driving circuit 2 and a horizontal driving circuit 4. The reflected light or transmitted light is photoelectric-converted with photoelectric conversion elements 7 and 8 to obtain output signals 9 and 10. A mobile speed of the object 6 is detected at a rotary encoder 11 and this detected value is compared with a reference value at a horizontal signal generating circuit 12 to correct a horizontal scanning signal in response to the increase/decrease from the reference value, allowing to correct the reference point of horizontal scanning of the cathode ray tube 5 in response to a variance in the mobile speed of the object 6.
JP56022476A 1981-02-17 1981-02-17 Picture reader Pending JPS57136874A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56022476A JPS57136874A (en) 1981-02-17 1981-02-17 Picture reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56022476A JPS57136874A (en) 1981-02-17 1981-02-17 Picture reader

Publications (1)

Publication Number Publication Date
JPS57136874A true JPS57136874A (en) 1982-08-24

Family

ID=12083766

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56022476A Pending JPS57136874A (en) 1981-02-17 1981-02-17 Picture reader

Country Status (1)

Country Link
JP (1) JPS57136874A (en)

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