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    Method of operating a bar code scanner
    101.
    发明专利
    Method of operating a bar code scanner 未知

    公开(公告)号：GB2246653B

    公开(公告)日：1995-02-15

    申请号：GB9112224

    申请日：1991-06-06

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： METLITSKY BORIS ,  SWARTZ JEROME ,  BARKAN EDWARD ,  SHEPARD HOWARD ,  GOREN DAVID ,  BIUSO TONY

    IPC: G02B26/10 ,  G06K7/10 ,  G06K7/14

    Abstract: A portable scanning head emits and receives light from a light-emitting diode (10) to read symbols, such as bar-code symbols. The optics (12,18) within the scanner are operative for focusing a light beam (11) and the view of a light sensor (17) in different planes (13,22) exteriorly of a scanner housing. Imaging means are provided in the unit for imaging a viewing window. The viewing window has an area smaller than that of the scan spot. The system can employ an LED (10) as a light source and tolerate the relatively large-sized (on the order of millimeters) scan spot without sacrificing reading performance since the photodiode (17) "sees" only that portion of the scan spot visible through the viewing window.

    LASER DIODE SCANNER WITH MINIMIZED POWER CONSUMPTION, MINIMIZED DEAD ZONE, AND INCREASED SAFETY
    103.
    发明专利
    LASER DIODE SCANNER WITH MINIMIZED POWER CONSUMPTION, MINIMIZED DEAD ZONE, AND INCREASED SAFETY 未知

    公开(公告)号：CA1331808C

    公开(公告)日：1994-08-30

    申请号：CA614733

    申请日：1989-09-29

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： BARKAN EDWARD

    IPC: G06K7/10

    Abstract: A laser diode in a scanner is deactuated during part of each scan to conserve power and to increase the working lifetime of the diode and of a battery for powering the scanner. The dead zone in which specular reflection may prevent a successful reading of the symbol is minimized. The scanner includes a head which cannot be disassembled unless an electrical cable connecting the head to the remainder of the scanner is first removed.

    106.
    发明专利
    未知

    公开(公告)号：DE4125899A1

    公开(公告)日：1992-02-06

    申请号：DE4125899

    申请日：1991-08-05

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： METLITSKY BORIS ,  SWARTZ JEROME ,  BARKAN EDWARD ,  SHEPARD HOWARD M ,  GOREN DAVID ,  BIUSO TONY

    IPC: G02B26/10 ,  G06K7/10

    Abstract: A portable scanning head emits and receives light from a light-emitting diode (10) to read symbols, such as bar-code symbols. The optics (12,18) within the scanner are operative for focusing a light beam (11) and the view of a light sensor (17) in different planes (13,22) exteriorly of a scanner housing. Imaging means are provided in the unit for imaging a viewing window. The viewing window has an area smaller than that of the scan spot. The system can employ an LED (10) as a light source and tolerate the relatively large-sized (on the order of millimeters) scan spot without sacrificing reading performance since the photodiode (17) "sees" only that portion of the scan spot visible through the viewing window.

    BAR CODE SYMBOL READERS WITH EDGE ENHANCEMENT
    107.
    发明专利
    BAR CODE SYMBOL READERS WITH EDGE ENHANCEMENT 未知

    公开(公告)号：CA2026371A1

    公开(公告)日：1991-05-21

    申请号：CA2026371

    申请日：1990-09-27

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： METLITSKY BORIS ,  BARKAN EDWARD ,  SWARTZ JEROME

    IPC: G06K7/10

    Abstract: The depth of modulation of an analog electrical signal generated by a photodetector during scanning of a bar code symbol in the field of bar code scanning is enhanced under circumstances where the modulation of the analog signal has been degraded, for example, by an oversized sampling aperture in relation to the widths of the symbol elements. The analog signal has high frequency components whose Low amplitudes are increased in magnitude prior to being conducted to a digitizer. The effect of noise introduced during reading of the bar code is cancelled by comparing in the comparator, the modulation-enhanced analog signal with the second derivative signal derived from the modulation-degraded unenhanced analog signal. The output of the comparator is a digital output signal having a logical level dependent on the amplitude of the enhanced analog signal at each zero crossing of the second derivative signal. The digital output signal is a closer representation of the code read by the scanner.

    109.
    发明专利
    未知

    公开(公告)号：DE2838243A1

    公开(公告)日：1980-01-03

    申请号：DE2838243

    申请日：1978-09-01

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： SWARTZ JEROME ,  HARRISON SHELLEY A ,  BARKAN EDWARD ,  DELFINE FRANK ,  BROWN GEORGE

    IPC: G06K7/10 ,  G06K9/02 ,  G11B7/00

    Abstract: Laser light reflected from a bar code symbol pattern is detected by a photodetector mounted in a portable scanning head of a laser scanning system. By selecting appropriate threshold values on the analog signal generated by the photodetector, the analog signal is converted to a series of pulses, each pulse width accurately corresponding to the width of a bar from the scanned pattern. A plurality of functions can be determined from the series of pulses, each function being independently selected by keyboard entry from the head, displayed on the head, and/or recorded by a printer remote from the head. Single line or multiple line scans in two orthogonal directions relative to the pattern may be selected. A bimorph or speaker-type oscillatory element may be utilized as a miniature scanning element. Circuitry for synchronizing scanning along both axes, and for generating a signal to drive the bimorph in a uniform, constant velocity manner is also disclosed.

    Vorrichtung und Verfahren zum gleichförmigen Beleuchten von Sichtfeldern in einer Transaktionsstellen-Arbeitsstation
    110.
    发明专利
    Vorrichtung und Verfahren zum gleichförmigen Beleuchten von Sichtfeldern in einer Transaktionsstellen-Arbeitsstation 未知

    公开(公告)号：DE112012004995T5

    公开(公告)日：2014-12-31

    申请号：DE112012004995

    申请日：2012-10-29

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： CHEN CAIHUN ,  BARKAN EDWARD ,  DRZYMALA MARK

    IPC: G06K7/10

    Abstract: Zeichen werden auf einer Arbeitsstation mit Fenstern in sich schneidenden Ebenen abgebildet. Die Arbeitsstation hat auch Festkörper-Imager mit Sichtfeldern, die in sich überschneidende Teilfelder unterteilt sind, die durch die Fenster blicken, sowie Beleuchtungsbaugruppen jeweils mit mehreren Lichtquellen, die jedes Teilfeld mit Beleuchtungslicht über ein Beleuchtungsfeld beleuchten, das ein jeweiliges Teilfeld überlappt. Lichtmodifizierende Elemente, wie z. B. Linsen oder Ablenkplatten, die radial von den mehreren Lichtquellen versetzt sind, konditionieren das Beleuchtungslicht von den mehreren Lichtquellen so, dass seine Lichtintensität über wenigstens ein beleuchtetes Teilfeld allgemein gleichförmig ist.

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