CA2056272A1 - Combined range laser scanner - Google Patents

Combined range laser scanner

Info

Publication number
CA2056272A1
CA2056272A1 CA002056272A CA2056272A CA2056272A1 CA 2056272 A1 CA2056272 A1 CA 2056272A1 CA 002056272 A CA002056272 A CA 002056272A CA 2056272 A CA2056272 A CA 2056272A CA 2056272 A1 CA2056272 A1 CA 2056272A1
Authority
CA
Canada
Prior art keywords
laser
scanning
illumination system
range
laser illumination
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.)
Granted
Application number
CA002056272A
Other languages
French (fr)
Other versions
CA2056272C (en
Inventor
Patrick Salatto, Jr.
Thomas Mazz
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.)
Symbol Technologies LLC
Original Assignee
Symbol Technologies LLC
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 Symbol Technologies LLC filed Critical Symbol Technologies LLC
Publication of CA2056272A1 publication Critical patent/CA2056272A1/en
Application granted granted Critical
Publication of CA2056272C publication Critical patent/CA2056272C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G06K7/10881—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 constructional details of hand-held scanners
    • 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
    • G06K7/10554—Moving beam scanning
    • G06K7/10564—Light sources
    • G06K7/10574—Multiple sources
    • 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
    • G06K7/10792—Special measures in relation to the object to be scanned
    • G06K7/10801—Multidistance reading
    • 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
    • G06K7/10792—Special measures in relation to the object to be scanned
    • G06K7/10801—Multidistance reading
    • G06K7/10811—Focalisation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K2207/00—Other aspects
    • G06K2207/1013—Multi-focal

Abstract

A combined range laser scanner and method for electro-optically reading indicia such as bar codes having parts of different light reflectivity which utilizes two laser diode optical illumination systems optimally focused for different working ranges. A first laser illumination system is optimized for contact operation and has a range extending to approximately two feet. The second laser illumination system is optimized for longer range scanning from approximately two to seventeen feet, and the two laser scanning systems are integrated into one combined range laser scanner. The combined range laser scanner incorporates therein logic circuitry which enables either laser illumination system as required fro the particular scanning application. Depending upon which laser illumination system is selected, the laser spot speed (e. g.
amplitude of the drive signal for the scanning motor) is controlled to limit the frequency of received light signals to that of standard signal processing and decoding circuits.
scanning is achieved with a common oscillating mirror element driven by a scanning motor, and the amplitude of the applied scanning motor driving signal is greater for the first laser illumination system optimized for contact or short range operation and less for the second laser illumination system for longer range scanning.
CA002056272A 1991-06-14 1991-11-27 Combined range laser scanner Expired - Lifetime CA2056272C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US71777091A 1991-06-14 1991-06-14
US717,770 1991-06-14

Publications (2)

Publication Number Publication Date
CA2056272A1 true CA2056272A1 (en) 1992-12-15
CA2056272C CA2056272C (en) 2001-10-16

Family

ID=24883415

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002056272A Expired - Lifetime CA2056272C (en) 1991-06-14 1991-11-27 Combined range laser scanner

Country Status (7)

Country Link
US (3) US5420411A (en)
EP (2) EP0864994B1 (en)
JP (1) JPH05182002A (en)
AT (2) ATE322048T1 (en)
CA (1) CA2056272C (en)
DE (2) DE69130060T2 (en)
ES (1) ES2119755T3 (en)

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Also Published As

Publication number Publication date
US5945658A (en) 1999-08-31
EP0864994A3 (en) 2000-03-29
EP0864994B1 (en) 2006-03-29
DE69133519D1 (en) 2006-05-18
EP0517958A2 (en) 1992-12-16
US5723851A (en) 1998-03-03
US5420411A (en) 1995-05-30
DE69130060D1 (en) 1998-10-01
ATE170306T1 (en) 1998-09-15
EP0517958A3 (en) 1992-12-23
EP0864994A2 (en) 1998-09-16
ATE322048T1 (en) 2006-04-15
DE69133519T2 (en) 2006-11-23
JPH05182002A (en) 1993-07-23
DE69130060T2 (en) 1999-04-29
ES2119755T3 (en) 1998-10-16
EP0517958B1 (en) 1998-08-26
CA2056272C (en) 2001-10-16

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