JPS57111774A - Signal processing system - Google Patents

Signal processing system

Info

Publication number
JPS57111774A
JPS57111774A JP18709080A JP18709080A JPS57111774A JP S57111774 A JPS57111774 A JP S57111774A JP 18709080 A JP18709080 A JP 18709080A JP 18709080 A JP18709080 A JP 18709080A JP S57111774 A JPS57111774 A JP S57111774A
Authority
JP
Japan
Prior art keywords
objective
scanning
electric signal
signal
processing system
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
JP18709080A
Other languages
Japanese (ja)
Inventor
Shunji Kitagawa
Hiroyuki Ikeda
Ichiro Sehata
Tetsuo Baba
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP18709080A priority Critical patent/JPS57111774A/en
Publication of JPS57111774A publication Critical patent/JPS57111774A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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)

Abstract

PURPOSE:To keep the absolute level of a signal almost constant, independently of timing, by inserting an electric signal obtained through scanning of white color before the scanning of objective, prior to the electric signal of objective, into an optical information reader. CONSTITUTION:Before scanning a read-in objective such as a bar code symbol 5 with a laser beam 2, white paper 7 is stuck between photoscanning elements 3 consisting of a hologram and a reflected light 12 is received at a photodetector 6, allowing to scan a nonread-in objective near white color without fail, and the level of an effective signal is made flat by giving the obtained electric signal just before the electric signal obtained by scanning the objective 5, allowning to increase the amplitude dynamic range of a signal processing system substantially.
JP18709080A 1980-12-29 1980-12-29 Signal processing system Pending JPS57111774A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18709080A JPS57111774A (en) 1980-12-29 1980-12-29 Signal processing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18709080A JPS57111774A (en) 1980-12-29 1980-12-29 Signal processing system

Publications (1)

Publication Number Publication Date
JPS57111774A true JPS57111774A (en) 1982-07-12

Family

ID=16199925

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18709080A Pending JPS57111774A (en) 1980-12-29 1980-12-29 Signal processing system

Country Status (1)

Country Link
JP (1) JPS57111774A (en)

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