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162 records (took 0.024 seconds)

    105.
    发明专利
    未知

    公开(公告)号：DE69330769T2

    公开(公告)日：2002-07-04

    申请号：DE69330769

    申请日：1993-06-14

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： KATZ JOSEPH ,  METLITSKY BORIS ,  SWARTZ JEROME ,  BARKAN EDWARD ,  SPITZ GLENN S

    IPC: G06K7/00 ,  G06K7/10

    Abstract: A symbol scanning system which adaptively changes scanning system parameters including light beam pattern and focus to improve barcode readability. The scanning system including: a scanner, responsive to coordinate control signals, for directing a light beam in a pattern at a symbol at a predetermined location, detecting a reflected portion of the light beam, and generating a feedback signal corresponding to the detected portion of the reflected light beam; a microprocessor, responsive to the feedback signal, for generating pattern control signals; a pattern generator for generating the coordinate control signals in responsive to the pattern control signals and for determining the light beam pattern; and signal processing circuitry, including drive and control units, for adjusting gain, bandwidth, and digitizer threshold levels.

    107.
    发明专利
    未知

    公开(公告)号：DE69523376D1

    公开(公告)日：2001-11-29

    申请号：DE69523376

    申请日：1995-06-30

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： JOSEPH EUGENE ,  LI YAJUN ,  HE DUANFENG ,  KATZ JOSEPH ,  SWARTZ JEROME

    IPC: G06K7/10

    Abstract: A plurality of the areas of differing light reflectivity of a bar code symbol (34) or the like are simultaneously illuminated using, for example, a beam of laser light (22) that has an elongate cross-section. The light beam (22) is swept over the symbol to be read in a direction transverse to the elongated dimension of the illuminated region (78) so that a two-dimensional area (42) of the symbol is illuminated over time. The reflected light is sensed by a 1D CCD array (50). A microprocessor (52) within the scanner provides visual feedback to aid a user in aligning the device, and also provides for a selectable aspect ratio for the image, a selectable image resolution and size, a selectable aspect ratio of the illumination, and a selectable pixel size. All of these options may be programmed within the microprocessor (52), enabling the device to read a large variety of two-dimensional symbols.

    108.
    发明专利
    未知

    公开(公告)号：DE69330175T2

    公开(公告)日：2001-11-22

    申请号：DE69330175

    申请日：1993-08-26

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： MAROM EMANUEL ,  KATZ JOSEPH

    IPC: G06K7/015 ,  G06K7/10

    Abstract: The use of linear axicons or similar optical elements in a bar code scanner produces a scanning spot of a size correlated generally with dimensions of features of the scanned information, wherein the spot size remains substantially constant for varying distances between the scanner and the symbol over a substantial range of distances. Optical elements of this type produce a diffraction pattern comprising a central lobe and a number of rings surrounding the central lobe. An aperture is provided to limit the beam and thus the number of rings in the pattern which actually reach the symbol during scanning. The extent of the limited beam and the phase front tilt angle produced by the optical element are chosen to produce a desired resolution, which relates to the density of symbols the scanner is to read, and to produce a desired working range. The invention also provides a modular light emitting device including a universal light emitting module and an optical assembly, including the axicon and aperture, mounted on the module to adapt the optical characteristics of light from the module to conform to the requirements of a particular scanning application.

    109.
    发明专利
    未知

    公开(公告)号：AT202230T

    公开(公告)日：2001-06-15

    申请号：AT93115821

    申请日：1993-09-30

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： BARD SIMON ,  KATZ JOSEPH ,  STERN MIKLOS ,  LI YAJUN

    IPC: G06K7/10 ,  G09C5/00

    Abstract: The laser diode (133) of an optical scanning system (100) is located in a separate unit (130) and light therefrom carried to a remote scan head (110) via an optical fiber (150). This reduces the size and weight of the scan head (110) and reduces the temperature sensitivity of the scan head (110). The scan head (110) may include an optical sensor (117) for detecting light reflected from scanned symbols.

    110.
    发明专利
    未知

    公开(公告)号：DE69330175D1

    公开(公告)日：2001-05-31

    申请号：DE69330175

    申请日：1993-08-26

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： MAROM EMANUEL ,  KATZ JOSEPH

    IPC: G06K7/015 ,  G06K7/10

    Abstract: The use of linear axicons or similar optical elements in a bar code scanner produces a scanning spot of a size correlated generally with dimensions of features of the scanned information, wherein the spot size remains substantially constant for varying distances between the scanner and the symbol over a substantial range of distances. Optical elements of this type produce a diffraction pattern comprising a central lobe and a number of rings surrounding the central lobe. An aperture is provided to limit the beam and thus the number of rings in the pattern which actually reach the symbol during scanning. The extent of the limited beam and the phase front tilt angle produced by the optical element are chosen to produce a desired resolution, which relates to the density of symbols the scanner is to read, and to produce a desired working range. The invention also provides a modular light emitting device including a universal light emitting module and an optical assembly, including the axicon and aperture, mounted on the module to adapt the optical characteristics of light from the module to conform to the requirements of a particular scanning application.

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