JPS57111775A - Signal processing system - Google Patents

Signal processing system

Info

Publication number
JPS57111775A
JPS57111775A JP18709180A JP18709180A JPS57111775A JP S57111775 A JPS57111775 A JP S57111775A JP 18709180 A JP18709180 A JP 18709180A JP 18709180 A JP18709180 A JP 18709180A JP S57111775 A JPS57111775 A JP S57111775A
Authority
JP
Japan
Prior art keywords
objective
scanning
electric signal
detector
detected
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
JP18709180A
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 JP18709180A priority Critical patent/JPS57111775A/en
Publication of JPS57111775A publication Critical patent/JPS57111775A/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

Abstract

PURPOSE:To keep the absolute level of a signal almost constant, independently of timing, by inserting an electric signal obtained through exciting a light emitting body just before the scanning of an objective, prior to an electric signal of an objective, in an optical information reader. CONSTITUTION:Intermission of a photo scanning element 3, that is, a non-scanning period of a bar code symbol is detected at a detector 7, a signal is generated, a light emitting body 12 is excited, and a developed light 13 is detected at a photo detector 6. Before the objective such as the bar code symbol 5 is scanned at a laser light 2, a non-scanning period is detected at a detector 7, a light emitting body 12 is excited, and an electric signal obtained through giving the light 13 to the photo detector 6 is given just before the electric signal obtained through the scanning of the objective 5, allowing to make the level of an effective signal flat and to increase the amplitude dynamic range of the signal processing system substantially.
JP18709180A 1980-12-29 1980-12-29 Signal processing system Pending JPS57111775A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18709180A JPS57111775A (en) 1980-12-29 1980-12-29 Signal processing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18709180A JPS57111775A (en) 1980-12-29 1980-12-29 Signal processing system

Publications (1)

Publication Number Publication Date
JPS57111775A true JPS57111775A (en) 1982-07-12

Family

ID=16199942

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18709180A Pending JPS57111775A (en) 1980-12-29 1980-12-29 Signal processing system

Country Status (1)

Country Link
JP (1) JPS57111775A (en)

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