公开(公告)号：JPH076198A

公开(公告)日：1995-01-10

申请号：JP14076393

申请日：1993-06-11

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： BRIDGELALL RAJ ,  GOREN DAVID ,  KATZ JOSEPH ,  SWARTZ JEROME ,  BARKAN EDWARD ,  SPITZ GLENN S ,  METLITSKY BORIS ,  BARD SIMON

IPC: G06K7/00 ,  G06K7/10

Abstract: PURPOSE: To provide a symbol scanning system which reads a symbol such as the bar code and suitably changes the pattern of a light beam in response to a feedback signal. CONSTITUTION: A symbol scanning system which suitably changes scanning system parameters containing the pattern and focal point of a light beam so as to improve readability of bar codes is provided with a scanner which directs the light beam toward a symbol at a prescribed position in a certain pattern in response to a coordinate control signal, detects the reflected part of the light beam, and generates the feedback signal corresponding to the detected part of the reflected light beam, a microprocessor 10 which generates a pattern control signal in response to the feedback signal, a pattern generator 20 which generates the coordinate control signal and decides a light beam pattern in response to the pattern control signal, and a signal processing circuit including a drive control unit 40A for adjusting the threshold levels of gains, band widths, and a digitizer.

公开(公告)号：AT205948T

公开(公告)日：2001-10-15

申请号：AT93109468

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.

公开(公告)号：DE69131573D1

公开(公告)日：1999-10-07

申请号：DE69131573

申请日：1991-12-30

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： DVORKIS PAUL ,  GOREN DAVID P ,  SPITZ GLENN S ,  MCGLYNN DANIEL R

IPC: G06K7/10

Abstract: A system for reading bar code symbols or the like, having a scanner for generating a laser beam directed toward a target and producing a narrow first raster scanning pattern that enables the user to manually aim and direct the beam to the location desired by the user and a relatively wider second raster scanning pattern that sweeps an entire symbol to be read, and a detector for receiving reflected light from such symbol to produce electrical signals corresponding to data represented by such symbol.

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.

公开(公告)号：DE69330769D1

公开(公告)日：2001-10-25

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.

公开(公告)号：DE69131573T2

公开(公告)日：2000-04-06

申请号：DE69131573

申请日：1991-12-30

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： DVORKIS PAUL ,  GOREN DAVID P ,  SPITZ GLENN S ,  MCGLYNN DANIEL R

IPC: G06K7/10

Abstract: A system for reading bar code symbols or the like, having a scanner for generating a laser beam directed toward a target and producing a narrow first raster scanning pattern that enables the user to manually aim and direct the beam to the location desired by the user and a relatively wider second raster scanning pattern that sweeps an entire symbol to be read, and a detector for receiving reflected light from such symbol to produce electrical signals corresponding to data represented by such symbol.

公开(公告)号：AT184123T

公开(公告)日：1999-09-15

申请号：AT91122402

申请日：1991-12-30

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： DVORKIS PAUL ,  GOREN DAVID P ,  SPITZ GLENN S ,  MCGLYNN DANIEL R

IPC: G06K7/10

Abstract: A system for reading bar code symbols or the like, having a scanner for generating a laser beam directed toward a target and producing a narrow first raster scanning pattern that enables the user to manually aim and direct the beam to the location desired by the user and a relatively wider second raster scanning pattern that sweeps an entire symbol to be read, and a detector for receiving reflected light from such symbol to produce electrical signals corresponding to data represented by such symbol.