CA2508035A1 - System and method for auto focusing an optical code reader - Google Patents

System and method for auto focusing an optical code reader Download PDF

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Publication number
CA2508035A1
CA2508035A1 CA002508035A CA2508035A CA2508035A1 CA 2508035 A1 CA2508035 A1 CA 2508035A1 CA 002508035 A CA002508035 A CA 002508035A CA 2508035 A CA2508035 A CA 2508035A CA 2508035 A1 CA2508035 A1 CA 2508035A1
Authority
CA
Canada
Prior art keywords
pixel signals
received
circuitry
accordance
control signal
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
CA002508035A
Other languages
French (fr)
Other versions
CA2508035C (en
Inventor
Dmitriy Yavid
Alex Breytman
Bradley S. Carlson
Mark Krichever
Mehul Patel
Edward Hatton
Paul Dvorkis
Thomas D. Bianculli
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, Inc.
Dmitriy Yavid
Alex Breytman
Bradley S. Carlson
Mark Krichever
Mehul Patel
Edward Hatton
Paul Dvorkis
Thomas D. Bianculli
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, Inc., Dmitriy Yavid, Alex Breytman, Bradley S. Carlson, Mark Krichever, Mehul Patel, Edward Hatton, Paul Dvorkis, Thomas D. Bianculli filed Critical Symbol Technologies, Inc.
Publication of CA2508035A1 publication Critical patent/CA2508035A1/en
Application granted granted Critical
Publication of CA2508035C publication Critical patent/CA2508035C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
    • G06K19/10—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
    • G06K19/14—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards the marking being sensed by radiation
    • 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
    • G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
    • 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
    • G06K7/10712—Fixed beam scanning
    • G06K7/10722—Photodetector array or CCD scanning
    • 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

Abstract

An optical code reader is provided including imaging circuitry having an array of photo sensing devices capable of sensing light incident on the array and outputting a plurality of pixel signals corresponding to the sensed light. The reader further includes control and logic circuitry for receiving a subset of the plurality of pixel signals, processing the received subset of the plurality of pixel signals for determining if the received pixel signals meet at least one predetermined condition, and outputting a selection control signal in accordance with the processing results. A focus analysis software module executable by the control and logic circuitry determines the focus quality of the received pixel signals. A
selector control software module executable by the control and logic circuitry generates a selection control signal in accordance with the determined focus quality of the received pixel signals. Selector circuitry selectively enables the imaging circuitry to output selected pixel signals of the plurality of pixel signals in accordance with the selection control signal.
CA002508035A 2002-12-18 2003-12-17 System and method for auto focusing an optical code reader Expired - Fee Related CA2508035C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US43451902P 2002-12-18 2002-12-18
US60/434,519 2002-12-18
US10/389,184 US7025272B2 (en) 2002-12-18 2003-03-14 System and method for auto focusing an optical code reader
US10/389,184 2003-03-14
PCT/US2003/040389 WO2004059566A1 (en) 2002-12-18 2003-12-17 System and method for auto focusing an optical code reader

Publications (2)

Publication Number Publication Date
CA2508035A1 true CA2508035A1 (en) 2004-07-15
CA2508035C CA2508035C (en) 2008-01-29

Family

ID=32599745

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002508035A Expired - Fee Related CA2508035C (en) 2002-12-18 2003-12-17 System and method for auto focusing an optical code reader

Country Status (5)

Country Link
US (1) US7025272B2 (en)
EP (1) EP1573649A1 (en)
AU (1) AU2003301063B2 (en)
CA (1) CA2508035C (en)
WO (1) WO2004059566A1 (en)

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US11366284B2 (en) 2011-11-22 2022-06-21 Cognex Corporation Vision system camera with mount for multiple lens types and lens module for the same
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Also Published As

Publication number Publication date
EP1573649A1 (en) 2005-09-14
CA2508035C (en) 2008-01-29
AU2003301063B8 (en) 2004-07-22
WO2004059566A1 (en) 2004-07-15
AU2003301063A1 (en) 2004-07-22
AU2003301063B2 (en) 2007-08-16
WO2004059566B1 (en) 2004-08-19
US20040118926A1 (en) 2004-06-24
US7025272B2 (en) 2006-04-11

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