公开(公告)号：JPH04220786A

公开(公告)日：1992-08-11

申请号：JP3637891

申请日：1991-03-01

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： METLITSKY BORIS ,  KATZ JOSEPH ,  MAROM EMANUEL ,  GOUSGOUNIS DEAN

IPC: G06K7/10

Abstract: PURPOSE: To generate light beams for scanning at a high speed with a bar code scanner without a moving part and to improve the read precision and efficiency. CONSTITUTION: Arrangement 10 where laser diodes or LED 11 which are sequentially started one by one are linearly arranged is used. Optical output from the arrangement 10 is image-formed on a line 13 on a focus face by using an appropriate lens system, and the video of the arrangement 10 crosses the focus face and appears as the line 13 for scanning. A bar code mark 14 is scanned by the line 13. Since moving parts do not exist in the scanning device, scanning speed can be speeded up compared to a machine type rocking mirror. Relevance is given to data signals by using appropriate algorithm and the precision of decoding can be improved.

公开(公告)号：ES2157910T3

公开(公告)日：2001-09-01

申请号：ES93113699

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.

公开(公告)号：AT200830T

公开(公告)日：2001-05-15

申请号：AT93113699

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.

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.

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.