US20040164165A1 - Optical reader having a plurality of imaging modules - Google Patents

Optical reader having a plurality of imaging modules Download PDF

Info

Publication number
US20040164165A1
US20040164165A1 US10782569 US78256904A US2004164165A1 US 20040164165 A1 US20040164165 A1 US 20040164165A1 US 10782569 US10782569 US 10782569 US 78256904 A US78256904 A US 78256904A US 2004164165 A1 US2004164165 A1 US 2004164165A1
Authority
US
Grant status
Application
Patent type
Prior art keywords
image data
frame
reader
control circuit
image
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.)
Abandoned
Application number
US10782569
Inventor
William Havens
Charles Barber
Colleen Gannon
Robert Gardiner
Robert Hennick
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.)
Hand Held Products Inc
Original Assignee
Hand Held Products Inc
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

Links

Images

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544Methods 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
    • G06K7/10821Methods 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
    • G06K7/10861Methods 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 sensing of data fields affixed to objects or articles, e.g. coded labels
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544Methods 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
    • G06K7/10554Moving beam scanning
    • G06K7/10564Light sources
    • G06K7/10574Multiple sources
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544Methods 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
    • G06K7/10554Moving beam scanning
    • G06K7/10564Light sources
    • G06K7/10584Source control
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544Methods 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
    • G06K7/10712Fixed beam scanning
    • G06K7/10722Photodetector array or CCD scanning
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544Methods 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
    • G06K7/10821Methods 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
    • G06K7/10881Methods 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
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544Methods 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
    • G06K7/10821Methods 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
    • G06K7/10881Methods 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
    • G06K7/109Methods 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 adaptations to make the hand-held scanner useable as a fixed scanner
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544Methods 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
    • G06K7/10821Methods 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
    • G06K7/1098Methods 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 the scanning arrangement having a modular construction
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/14Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/14Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
    • G06K7/1404Methods for optical code recognition
    • G06K7/1408Methods for optical code recognition the method being specifically adapted for the type of code
    • G06K7/14172D bar codes
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K9/00Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
    • G06K9/20Image acquisition
    • G06K9/22Image acquisition using hand-held instruments

Abstract

The invention is an optical reader having a plurality of imaging modules. In one method for operating a multiple imaging module reader of the invention, a second frame of image data captured via actuation of a second imaging module is automatically captured and subjected to decoding in the case an attempt to decode using a frame of image data captured via actuation of a first imaging module fails. In another embodiment, a frame of image data captured via actuation of an image sensor of a first module and actuation of illumination of a second imaging module is subjected to decoding. In another embodiment, frames of image data captured via actuation of image sensors of spaced apart modules are combined. The various modules of a multiple imaging module reader can be adapted to have different best focus positions so that a field depth of the reader is improved.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • This is a continuation of U.S. patent application Ser. No. 10/161,950 filed on Jun. 4, 2002, the content of which is relied upon and incorporated herein by reference in its entirety, and the benefit of priority under 35 U.S.C. §120 is hereby claimed.[0001]
  • BACKGROUND OF THE INVENTION
  • 1. Field of the Invention [0002]
  • The invention relates to optical readers in general and particularly to an optical reader having multiple image sensor devices. [0003]
  • 2. Background of the Prior Art [0004]
  • Decodable indicia such as bar codes and OCR decodable characters are finding increased use in an ever expanding variety of applications. Bar codes are being applied not only to paper substrate surfaces but other surfaces as well such as plastic bags, glass, and directly on finished articles. The affixing of a decodable indicia directly to an article is referred to as “direct part marking.” Where decodable symbols or characters have been applied to particularly reflective “shiny” surfaces (glass, plastic, metallic surfaces), “specular reflection” decode failures have been observed. [0005]
  • “Specular reflection” occurs where a light ray incident on a highly reflective (mirror) surface is reflected substantially at an angle measured from the surface that is substantially normal with respect to the incident ray. In optical readers, light sources are positioned to emit light along a path closely adjacent a centrally located imaging axis. An optical reader light is directed at a reflective target and, therefore, the illumination light tends to be reflected specularily in the direction of the reader's photodetector elements. Specular reflection can result in the captured image data failing to exhibit adequate contrast between dark and light markings of a decodable indicia. With the increased miniaturization of optical readers, light sources for illuminating a target are being positioned in closer proximity with a photodetector element of the reader, thereby rendering the modem reader more susceptible to specular reflection read failures. [0006]
  • The proliferation of the use of decodable markings has brought to light additional problems with presently available optical readers. It has become more common to encode more information into single decodable indicia, e.g. with use of “high density” bar codes, to affix more than one decodable indicia onto an article or package in need of decoding, and to make bar codes wider so that they can encode more information. “High density” bar codes are best decoded with the use of a high resolution optical reader which is configured to have a short “best focus” position. Extra wide code bar codes and scenes having more than one bar code are best decoded with use of readers having a longer best focus position. Commercially available optical readers cannot easily read high density extra wide decodable symbols or multiple symbols from a scene which are encoded in high density. [0007]
  • There is a need for an optical reader which is impervious to decode failures resulting from specular reflection, and which is adapted to read large or multiple high density decodable symbols formed on a target. [0008]
  • SUMMARY OF THE INVENTION
  • The invention in one major aspect relates to an optical reader having more than one imaging module, wherein each imaging module typically includes a combination of a support assembly, an image sensor, imaging optics, and at least one illumination light source. [0009]
  • In one embodiment the reader includes a gun style housing which houses a pair of 2D imaging modules. In another embodiment, the reader includes a gun style housing having three 2D imaging modules. The modules may have imaging axes that are in parallel, diverging or converging relation. One or more of the 2D imaging modules can be replaced with a 1D imaging module. [0010]
  • In another embodiment the reader module may include a “dumbbell” style housing having a central handle portion and a pair of laterally disposed head portions, each of the head portions housing an imaging module. The head portions can be made adjustable so that the relative position of the imaging axes of the two imaging modules can be adjusted. The dumbbell reader can be mounted on a presentation stand which further includes a third head portion which houses a third imaging module. [0011]
  • In another aspect, an optical reader of the invention can be operated using a control circuit which comprises a multi-functional processor IC chip which, in addition to having a central processing unit (CPU) includes a programmable integrated frame grabber block. [0012]
  • A control circuit of the invention can be adapted to carry out a variety of routines involving coordinated capture of image data utilizing more than one imaging module. In one example of the invention, a frame of image data is captured by actuation of a first imaging module and light sources from a first imaging module. The frame is then subjected to a decoding attempt. If the decoding attempt involving the first captured frame fails, a second frame of image data is captured by actuation of an image sensor of the first imaging module and actuation of a light source from a second imaging module and subjected to decoding. The second frame of image data captured utilizing a spaced apart illumination light source and image sensor from two spaced apart imaging modules can be expected to be free of image degradation problems attributable to specular reflection. [0013]
  • In another aspect of the invention, a control circuit can be configured to combine image data captured by a reader of the invention having more than one imaging module. Because the relative positions of imaging modules in a multiple imaging module reader of the invention are known, first and second frames of image data captured via actuation of first and second imaging modules of a reader of the invention can readily be combined according to an image frame combination method. [0014]
  • In a still further aspect of the invention, various imaging modules of a multiple imaging module optical reader can be configured to have different best focus positions. Configuring different imaging modules of a multiple imaging module optical reader to have different best focus positions improves the overall depth of field of the multiple imaging module optical reader. [0015]
  • These and other details and advantages will become apparent from the detailed description of the preferred embodiment hereinbelow.[0016]
  • DETAILED DESCRIPTION OF THE INVENTION
  • Embodiments of optical readers having more than one imaging module are shown in FIGS. 1[0017] a-1 l. In FIGS. 1a-1 b a gun style optical reader 5-1 is shown including first and second imaging modules 10 a and 10 b incorporated in housing 7. Imaging modules 10 can be of the type shown in FIGS. 3a-3 d. Imaging module 10,10-1 as shown in FIGS. 3a and 3 c includes a support assembly 80 having a containment section 81 and a retainer section 82, a first circuit board 14 a carrying an image sensor 32, a second circuit board 14 b, illumination LEDs 16 aiming LEDs 18, an optical plate 26 carrying aiming and illumination optics 25, 27, and support posts 84 holding the various components of the module together. Further details of imaging module 10-1 are described in application Ser. No. 10/092,789, filed Mar. 7, 2002, entitled “Optical Reader Imaging Module,” incorporated herein by reference. As indicated by FIGS. 3a and 3 b imaging modules 10 can be built as a modularly installable self-contained unit. That is, module 10 can be assembled into the packaged form shown in FIGS. 3a and 3 b at an assembly location prior to being installed in a cavity defined by reader housing 7.
  • Imaging module [0018] 10 can be screw mounted on any rigid member within housing 7 in the manner described in application Ser. No. 10/092,789 filed Mar. 7, 2002, entitled “Optical Reader Imaging Module,” incorporated herein by reference hereinabove. Module 10 can include screw holes 810 for facilitating mounting of module 10 on a rigid member. As indicated by support assembly 80 of FIG. 3d, support assembly 80 can include wings 80 w having screw holes 810. Reader 5 can include a main circuit board 15 or “mother board” which includes control circuit circuitry as described in detail in connection with FIGS. 2a-2 f. In one embodiment, as indicated by reader 5-2 of FIG. 1d, a plurality of imaging modules 10 can be mounted to a rigid member provided by a common main circuit board 15. Imaging modules 10 can be interfaced with mother board 15 with use standardly known flex strip connectors 17.
  • Module [0019] 10 a and module 10 b are disposed in a common cavity 6. A wall 8 formed in housing 7 dividing cavity 6 into two spaces would not create two separate cavities since cavity 6 of reader 5-1 would still be delimited by the common outer peripheral wall of housing 7.
  • Incorporating more than one imaging module [0020] 10 in an optical reader housing 7 yields a number of advantages. For example, if an attempt to decode a decodable indicia by capturing and subjecting to decoding an image captured via actuation of first module 10 a fails, a second decoding an attempt can be made by capturing and subjecting to decoding image captured via actuation of second imaging module 10 b. Further, reader 5 can be actuated to capture and subject to decoding a frame of image data captured by actuation of an image sensor 32 of a first module 10 a and illumination LEDs 16 of a second imaging module 10 b. The spacing between illumination LEDs 16 of a second module 10 b and an image sensor 32 of a first imaging module 10 a renders the frame of image data capture by the described method substantially impervious to specular reflection image degradation.
  • In addition, image data of several frames captured by actuation of several different imaging modules can be combined, by one of several possible image frame combination methods, to yield a larger frame of image data. The larger image representation is yielded by combining multiple frames of image data and can be subjected to decoding, thereby facilitating decoding of larger decodable indicia or multiple decodable indicia printed over a large area of a target substrate. Specular reflection avoidance and frame image combination methods will be described in greater detail herein. [0021]
  • In the embodiment of FIGS. 1[0022] c and 1 d, reader 5-2 comprises three imaging modules including a first imaging module 10 a, second imaging module 10 b and third imaging module 10 c each having a respective imaging axis 11 a, 11 b, and 11 c. Like reader 5-1 (FIGS. 1a and 1 b) the imaging axes of reader 5-2 of FIGS. 1c and 1 d are in converging relation. Configuring reader 5-2 so that modules 10 are in converging relation assures that each of a reader's imaging modules (10 a, 10 b, and 10 c in reader 5-2) are positioned to capture images corresponding to substantially the same area of a target substrate. Accordingly, as will be explained in further detail herein readers 5-1 and 5-2 as shown in FIGS. 1a-1 d are particularly well suited for reducing specular reflection misreads.
  • In FIGS. 1[0023] e-1 h multiple imaging module optical readers 5 are shown which are particularly well-suited for applications wherein frames of image data generated by actuation of several imaging modules are configured to develop large field image representations. In the embodiment of FIGS. 1e and 1 f, reader 5-3 including gun style housing 7 has installed therein three imaging modules 10 a, 10 b, and 10 c wherein the imaging axes 11 a, 11 b, and 11 c, of the three modules are in substantially parallel relation.
  • In the embodiment of FIGS. 1[0024] g and 1 h reader 54 comprising gun style housing 7 has installed therein three imaging modules, wherein the imaging axes 11 a, 11 b, and 11 c of the three modules are in diverging relation. Reader 5-3 and reader 54 are especially well suited for applications requiring an enlarged field of view. By way of routines which will be described in greater detail herein, frames of image data captured by actuation of three modules can be combined to yield a larger frame of image data comprising an image representation of an enlarged decodable symbol or character or of multiple decodable indicia.
  • Referring now to FIGS. 1[0025] i and 1 j, dumbbell style multiple imaging module optical reader 5-5 is described Dumbell reader 5-5 is a reader including three housing portions 7 and each defining a cavity 6. Reader 5-5 of FIGS. 1i and 1 j includes a central handle 19 which supports a pair of laterally disposed head sections 20. Handle 19 may include a thumb-actuated trigger 13 t. Installed in each head section 20 is an imaging module 10 which may be of the type described in connection with FIGS. 3a-3 d. Imaging module 10 of reader 5-5 as in the case of readers 5-1, 5-2, 5-3, and 5-4 may be screw mounted on any rigid member within head sections 20. Head sections 20 of housing 7 are mounted to the major body of housing 7 by ball and socket type connectors 21. Ball and socket connectors 21 may be provided, for example, by a ball and socket connector of a type available from R-A-M Mounting Systems, Inc. of Chandler Ariz. Ball and socket connectors 21 may include mechanical detent mechanisms providing feel feedback as to the position of head section 20 so that a user may click head sections 20 into one or more normally defined positions. Flexible cable 18 as shown in FIGS. 1i and 1 j can be disposed to provide electrical communication between modules 10 and a main circuit board 15 within a cavity defined by a handle portion of housing 7. Main circuit board 15 of reader 5-5 may carry components of a multiple module electrical circuit, e.g. circuit 105 described with reference to FIG. 2f.
  • In the embodiment of FIG. 1K, handle [0026] 19 of dumbbell style reader 5-7 includes a central aperture 19 a which is fittable about post 45. Handle 19 includes knob actuated bolt 46 for securing dumbbell style reader 5-6 against post 45. Post 45 in the embodiment of FIG. 1k is part of a presentation style reader 5-7 which, in addition to including detachable dumbbell style reader 5-6 further includes stand 47 including knob actuated bolt 48 for enabling a vertical position of post 45 to be adjusted, and top head section 20 a disposed at a top of post 45. Head section 20 a may be mounted to post 45 with use of ball and socket connector 21. Dumbbell style optical reader 5-6 may be removed from post 45 so that dumbbell style reader 5-6 can be used in a hand held mode. For realization of a hand held mode, knob actuated bolt 48 is loosened and post 45 is removed from stand 47. Knob actuated bolt 46 is then loosened and dumbbell style reader 5-6 is removed from post 45 to allow hand held use.
  • A dumbbell style reader e.g. [0027] 5-5 and 5-6 is particularly well suited for use in applications wherein specular reflection read failures can be expected. In the example of FIG. 1j, dumbbell style reader 5-5 is shown in a mode wherein head sections 20 are canted in a position such that imaging axes 11 a and 11 b of module 10 a and module 10 b are in converging relation and positioned so the imaging modules 10 a and 10 b generate image data corresponding to substantially the same scene at a target substrate, S, when reader 5-5 is at certain reader-to-target distance. If module 10 a is positioned with respect to a reflective target T such that specular reflection from target T results in a decode failure, a frame of image data captured by actuation of illumination light sources 16 and an image sensor 32 of second module 10 b can be subjected to a second decoding attempt. In addition, an expectedly specular reflection-free frame of image data can be captured by actuation of image sensor 32 of first imaging module 10 a in combination with actuation of illumination of second imaging module 10 b in place of illumination from first imaging module. The term “target” herein refers to subject matter (e.g. decodable indicia) presently in a field or view of at least one module of reader 5. The term “target substrate” refers to a member (e.g. a piece of paper, an equipment part) bearing subject matter to which reader may be directed.
  • The multiple imaging module optical readers as shown in FIGS. 1[0028] a-1 k include 2D imaging modules, which may be for example Model IT 4200, Model IT 4250, or Model IT 4000 imaging modules of the type available from HHP, Inc. of Skaneateles Falls, N.Y. It will be understood that a 2D imaging module of any of the readers shown could be replaced by a 1D imaging module having a 1D image sensor. An example of a 1D imaging module which can be incorporated in any one of readers 5-1, 5-2, 5-3, 5-4, 5-5, 5-6, and 5-7 is shown in FIG. 3e. Imaging module 10-2 includes a 1D image sensor 32, a support assembly or frame 80, imaging optics 40, illumination light sources 18, and illumination optics including lens 25 carried by plate 26 and aiming apertures 43. Further details of an exemplary 1D imaging module are described in U.S. Pat. No. 6,119,939, entitled “Optical Assembly For Bar Code Scanner” incorporated herein by reference. In an image sensor array based 1D imaging module e.g. module 10-2 illumination and aiming light sources are normally provided by the same light sources which project a single illumination pattern which also serves as an aiming pattern. However, a 1D imaging module can also include light sources which project different illumination and aiming patterns. An imaging module of the invention can also comprise a laser diode based 1D imaging engine including a single photodetector, a laser diode and means for sweeping the laser beam projected by the laser diode across a target area.
  • Referring now to reader [0029] 5-9 of FIG. 1m, center module 10 c of reader 5-9 is a 1D imaging module while laterally disposed modules 10 a and 10 b are 2D modules. Configuring reader 5-9 so that reader 5-9 includes a center 1D imaging module 10 c, 10-2 and laterally disposed 2D imaging modules 10-1 provides certain advantages. Reader 5-9 can be programmed in accordance with a decode operation control program wherein a reader (1) first captures and subjects to decoding an image captured via actuation of first imaging module 10 c, and if the decoding attempt fails, (2) automatically captures and subjects to decoding a second image captured via actuation of an image sensor and illumination of one of laterally disposed 2D modules 10 a and 10 b.
  • One-dimensional bar code symbols are more common than 2D bar code symbols. Further, 1D bar code symbols are generally decoded more quickly and more accurately by capturing and processing 1D slice image data captured via actuation of a 1D image sensor than capturing and processing 2D image data captured via actuation of a 2D image sensor. Still further, an imaging axis [0030] 11 c of center imaging module 10 c disposed in a gun-style housing 7 can more readily be aligned with an indicia of a target, T, than lateral imaging modules 10 a and 10 b. Accordingly, it can be seen that reader 5-9 programmed in accordance with the above-described decode program is a reader which is both mechanically configured and programmed for optimization of the decoding of 1D symbols, while still having the capacity to decode matrix 2D symbols where matrix 2D symbols are present within a target, T.
  • Various electrical circuits [0031] 100, 101, 102, 103, 104, and 105 which can be utilized to control optical readers are shown and described with reference to FIGS. 2a, 2 b, 2 c, 2 d, 2 e, and 2 f While the present invention relates in a major aspect to optical readers having more than one imaging module, FIGS. 2a and 2 b show electrical circuits for operating optical readers having a single imaging module. Numerous principles of circuit operation discussed in relation to circuits 100, 101 are incorporated into multiple imaging module electrical circuits 102, 103, 104, 105 discussed in relation to FIGS. 2c - 2 f
  • In FIG. 2[0032] a a block diagram of an optical reader electrical circuit is shown having a multi-functional processor IC chip 180 including an integrated frame grabber block 148. Electrical circuit 100 shown in FIG. 2a can be utilized for control of a single 2D imaging module optical reader as is shown for example in U.S. Ser. No. 09/954,081 filed Sep. 17, 2001, entitled “Optical Reader Having Image Parsing Mode,” incorporated herein by reference.
  • In the specific embodiment of FIG. 2[0033] a, electrical circuit 100 includes a control circuit 140 comprising CPU 141, system RAM 142 and system ROM 143 and frame grabber block 148. Electrical circuit 100 further includes an image sensor 32 typically provided by a photosensitive array and an illumination block 160 having illumination LEDs 16 and aiming LEDs 18 as shown in the physical form view of FIGS. 3a-3 c. Image sensor 32 of FIG. 2a is shown as being provided by a 2D photo diode array. If image sensor 32 is replaced by a 1D image sensor, then aiming LEDs 18 and illumination LEDs 16 may be constituted by one set of LEDs. In the embodiment shown, image sensor 32 incorporated in an image sensor IC chip 182 which typically further includes an image sensor electrical circuit block 134. Image sensor electrical block 134 includes control circuit 135 for controlling image sensor 32, an A/D conversion circuit 136, for converting analog signals received from image sensor 32 into digital form and integrated clock 137 sometimes referred to as an oscillator.
  • In the embodiment shown in FIG. 2[0034] a, CPU 141 and frame grabber block 148 are incorporated in a multi-functional IC chip 180 which in addition to including CPU 141 includes numerous other integrated hardware components. Namely, multifunctional IC chip 180 may include a display control block 106, several general purpose I/O ports 116, several interface blocks such as a USB circuit block 107 and a UART block 108 for facilitating RS 232 communications, a UART block 109 for facilitating Irda communications, and a pulse width modulation (PWM) output block 110. Multi-functional processor IC chip 180 can also have other interfaces such as a PCMCIA interface 111, a compact flash interface 112, and a multimedia interface 113. If reader 5 includes a display 13 d, display 13 d may be in communication with chip 180 via display interface 106. Trigger 13 t and keypad 13 k may be in communication with chip 180 via general purpose I/O interface 116. Physical form views of readers having displays and keyboards are shown for example in U.S. application Ser. No. 10/137,484, filed May 2, 2002, entitled “Optical Reader Comprising Keyboard,” incorporated herein by reference. Multi-functional processor IC chip 180 may be one of an available type of multifunctional IC processor chips which are presently available such as a Dragonball IC processor chip available from Motorola, an Anaconda IC processor chip available from Motorola, a DSC IC chip of the type available from Texas Instruments, an O-Map IC chip also of the type available from Texas Instruments or a multifunctional IC processor chip of a variety available from Clarity, Inc.
  • Frame grabber block [0035] 148 of IC chip 180 replaces the function of a frame grabbing field programmable gate array (FPGA) as discussed in commonly assigned application Ser. No. 09/954,081, filed Sep. 17, 2001, entitled “Imaging Device Having Indicia-Controlled Image Parsing Mode,” incorporated herein by reference and Ser. No. 09/904,697, filed Jul. 13, 2001, entitled “An Optical Reader Having a Color Imager” incorporated herein by reference. More particularly, frame grabber block 148 is specifically adapted collection of hardware elements programmed to carry out, at video rates or higher, the process of receiving digitized image data from image sensor chip 182 and writing digitized image data to system RAM 142 which in the embodiment shown is provided on a discreet IC chip. Frame grabber block 148 includes hardware elements preconfigured to facilitate image frame capture. Frame grabber block 148 can be programmed by a user to capture images according to a user's system design requirements. Programming options for programming frame grabber block 148 include options enabling block 148 to be customized to facilitate frame capture that varies in accordance with image sensor characteristics such as image sensor resolution, clockout rating, and fabrication technology (e.g. CCD, CMOS, CID), dimension (1D or 2D) and color (monochrome or color).
  • Aspects of the operation of circuit [0036] 100 when circuit 100 captures image data into RAM 140 are now described. When trigger 13 t is pulled, CPU 141, under the operation of a program stored in system ROM 143, writes an image capture enable signal to image sensor chip 182 via communication line 151. Line 151, like the remainder of communication lines described herein represents one or more physical communication lines. In the embodiment shown, wherein image sensor chip 182 is of a type available from IC Media Corp., I2C interface 115 of chip 180 is utilized to facilitate communication with chip 182 (if another image sensor chip is selected another type of interface e.g. interface 116 maybe utilized). Other types of signals may be sent over line 151 during the course of image capture. Line 151 may carry, for example, timing initialization, gain setting and exposure setting signals.
  • When control block [0037] 135 of image sensor chip 182 receives an image capture enable instruction, control block 135 sends various signals to frame grabber block 148. Image sensor control block 135 typically sends various types of synchronization signals to frame grabber block 148 during the course of capturing frames of image data. In particular, control block 135 may send to frame grabber block 148 “start of frame signals” which inform frame grabber block 148 that chip 182 is ready to transmit a new frame of image data, “data valid window” signals which indicate periods in which a row of image data is valid and “data acquisition clock” signals as established by clock 137 controlling the timing of image data capture operations. In the embodiment described, line 152 represents three physical communication lines, each carrying one of the above types of signals. In an alternative embodiment, vertical and horizontal synchronization signals are processed by frame grabber 148 to internally generate a data valid window signal. Frame grabber block 148 appropriately responds to the respective synchronization signals, by establishing buffer memory locations within integrated RAM 149 of block 148 for temporary storage of the image data received from image sensor chip 182 over data line 159. At any time during the capture of a frame of image data into system RAM 142, buffer RAM 149 of frame grabber block 148 may store a partial (e.g about 0.1 to 0.8) or a full line of image data.
  • Referring to further aspects of electrical circuit [0038] 100, circuit 100 includes a system bus 150. Bus 150 maybe in communication with CPU 141 via a memory interface such as EIM interface 117 of IC chip 180. System RAM 142 and system ROM 143 are also connected to bus 150 and in communication with CPU 141 via bus 150. In the embodiment shown, RAM 142 and ROM 143 are provided by discreet IC chips. System RAM 142 and system ROM 143 could also be incorporated into processor chip 180.
  • In addition to having system RAM [0039] 142, sometimes referred to as “working” RAM, electrical circuit 100 may include one or more long term storage devices. Electrical circuit 100 can include for example a “flash” memory device 120. Several standardized formats are available for such flash memory devices including: “Multimedia” (MMC), “Smart Media,” “Compact Flash,” and “Memory Stick.” Flash memory devices are conveniently available in card structures which can be interfaced to CPU 141 via an appropriate “slot” electromechanical interface in communication with IC chip 180. Flash memory devices are particularly useful when reader 5 must archive numerous frames of image data. Electrical circuit 100 can also include other types of long term storage such as a hard drive which may be interfaced to bus 150 or to an appropriate I/O interface of processor IC chip 180.
  • In a further aspect of electrical circuit [0040] 100, control circuit 140 is configured to control the turning off and turning on of LEDs 16, 18 of illumination block 160. Control circuit 140 preferably controls illumination block 160 in a manner that is coordinated with the capturing of the frames of image data. Illumination LEDs 16 are typically on during at least a portion of frame capture periods. Configuring circuit 140 so that LEDs 16, 18 have off periods significantly reduces the power consumption of circuit 100.
  • In a further aspect of the electrical circuit [0041] 100, electrical circuit 100 can be configured so that PWM output interface 114 of IC chip 180 controls illumination LEDs of an imaging module such as illumination LEDs 16 of module 10-1 or aiming/illumination LEDs 18 of module 10-2.
  • In one embodiment, illumination block [0042] 160 is in communication with PWM output interface 114 and configured in such manner that LEDs 16 are turned on at a leading edge of PWM pulses output at PWM interface 114, and are turned off at falling edges of PWM pulses output at PWM interface 114. PWM interface 114 should be configured so that several pulses are generated and sent over communication line 153 i during the time that a single row of pixels of image data are exposed to light prior to clocking out of pixel values corresponding to that row. Thus, illumination LEDs 16 would be turned on and off several times during the exposure period for exposing a row of pixels to light. Further, the number of pulses output by PWM output 114 during the time that a single row of pixels are exposed should not vary substantially from row to row. The pixel clock signal received at frame grabber block 148 of IC chip 180 can be utilized to generate the PWM output. It can be seen, therefore, that multifunctional IC chip 180 including frame grabber block 148 and PWM output 114 greatly simplifies the task of developing PWM signals for use in controlling illumination LEDs 16 of module 10.
  • In another embodiment, PWM output [0043] 114 and illumination block 160 are configured so that PWM output 114 controls the intensity of illumination, not the on time/off time of illumination. Illumination LED block 160 in such an embodiment can include a power supply circuit which is interfaced to PWM output 114 such that the PWM signal output at PWM output 114 varies the voltage or current supplied to LEDs 16.
  • In a further aspect of electrical circuit [0044] 100, aiming LEDs 18 of circuit 100 can be controlled by a signal transmitted by a general purpose I/O port 116 of IC chip 180 over communication line 153 a. Multifunctional processor IC chip 180 can be programmed so that an aiming LED control signal 168, as is shown in the timing diagram of FIG. 2g, is caused to change to an “on” state when frame grabber block 148 completes the process of capturing a complete frame of image data. In the time line of FIG. 2g, frame exposure periods P1, P2, and P3 are plotted against an aiming LED control signal 168. Frame grabber block 148 may be configured to generate an “end of acquisition” or “end of frame” signal when frame grabber block 148 completes the process of capturing a complete frame of image data into RAM 142. When CPU 141 receives an “end of acquisition” signal, CPU 141 controls I/O port 116 to change the state of LED control signal 168. Control circuit 140 may also change the state of LED control signal 168 when generating a start of frame signal. As indicated by the time line of FIG. 2g, control circuit 140 may execute a delay prior to changing the state of signal 168. Control circuit 140 is programmed so that LED control signal 168 remains in an “ON” state known to be sufficiently short duration so as not to cause actuation of an aiming LED 18 during a succeeding frame exposure period. Configured in the manner described, aiming LEDs 18 are selectively pulsed on for a short duration during intermediate successive frame exposure periods, e.g. frame exposure periods P1 and P2.
  • Referring now to FIG. 2[0045] b, electrical circuit 101 is described. Electrical circuit 101 controls operation of a single imaging module optical reader comprising a low cost 1D CCD image sensor 32 incorporated on IC chip 183. Image sensor 32 of FIG. 2b may be provided for example by a Toshiba Model TCD 1304 AP linear image sensor. Further aspects of an exemplary 1D imaging module are described, for example, in application Ser. No. 09/658,811, filed Sep. 11, 2000, entitled “Optical Assembly for Barcode Scanner,” incorporated herein by reference.
  • Referring to aspects of electrical circuit [0046] 101 in detail, electrical circuit 101 includes a control circuit 140 which, like control circuit 140 of circuit 100 is partially incorporated in a multifunctional processor IC chip 180 including CPU 141 and a frame grabber block 148. Control circuit 140 of circuit 101 further includes system RAM 142 system ROM 143 and supplementary central processor unit (CPU) 147, integrated on processor IC chip 179. System RAM 142 and system RAM 143 are in communication with EIM interface 117 of IC chip 180 via bus 150.
  • Processor IC chip [0047] 179 provides control and timing operations similar to that provided by electrical block 134 of image sensor chip 182 described in FIG. 1a. Processor IC chip 179, in general, sends synchronization signals and digital clocking signals to IC chip 180, and sends digital clocking signals to A/D conversion circuit 136 and image sensor 32. Processor IC chip 179 of circuit 101 may be a relatively low power processor IC chip such as an 8 BIT Cyprus PSOC CY8C26Z33-24PZI Microcontroller processor IC chip.
  • Aspects of the operation of IC chip [0048] 179 in during the course of capturing slice image data will now be described in detail. When trigger 13 t is pulled, CPU 141 transmits enable image capture instructions over communication line 151. In response to receipt of an image capture enable instructions received from chip 180, processor IC chip 179 performs a variety of operations. Via communication line 152, processor IC chip 179 may send synchronization signals, such as “start of scan,” “data valid window,” and “data acquisition clock” signals to frame grabber block 148. Processor IC chip 179 may also send timing signals and digital clocking signals (e.g. master clock, integration clear gate, and shift gate pulse) to image sensor 32. Processor IC chip 179 typically also transmits a master clock signal to A/D conversion circuit 136. Referring to further aspects of IC chip 180 of circuit 101, CPU 141 of chip 180, may also send e.g. gain setting, exposure setting, and timing initialization signals via line 151 to IC chip 179. Communication between IC chip 180 and IC chip 179 may be made via an SPI interface or I/O interface 116 of chip 180 and chip 179.
  • As will be explained with reference to circuit [0049] 104, shown in FIG. 2e, processor IC chip 179 may be replaced by a programmable logic circuit, e.g. a PLD, CPLD, or an FPGA. IC chip 179 could also be replaced by an ASIC. Electrical circuit 101 of FIG. 2b, includes what may be termed a “digital digitizer” in that analog voltage levels transmitted by CCD image sensor 32 on line 155 are converted into gray scale pixel values by A/D converter 136 and transmitted via line 159 to frame grabber block 148. Circuit 101 could also include an analog digitizer which processes an analog signal generated by image sensor 32 to generate a two-state output signal that changes state in accordance with light-to-dark and dark-do-light transitions of the image sensor analog output signal.
  • Processor IC chip [0050] 179 also controls LED bank 160. LED bank 160 of a 1D image sensor reader typically includes a single bank of LEDs which simultaneously illuminates a target area and provides an aiming pattern facilitating aligning of the reader with a target indicia LEDs 18 of 1D imaging module 10-2 like LEDs 16 of module 10-1 can be pulsed so as to reduce energy consumption by LEDs 18.
  • Electrical circuit [0051] 100 and electrical circuit 101 form a family of 1D and 2D optical readers electrical circuits, which may be manufactured by a single manufacturing entity wherein both of the 1D and 2D readers include the same main processor chip, namely, multifunctional processor IC chip 180. Multifunctional processor IC chip 180 of circuit 100 and circuit 101 can both be provided by e.g. a Dragonball IC chip or an Anaconda IC chip of the type available from Motorola, Inc. Multifunctional processor IC chip 180 of electrical circuit 101 includes far more processing power than is necessary to provide the functionality of a 1D optical reader. Nevertheless, the inventors discovered that the overall cost of electrical circuit 101 would be reduced by incorporating frame grabbing multifunctional IC chip 180 in circuit 101 in that such incorporation reduces overall engineering cost relative to that which would ensue from the development of two different 1D and 2D electrical circuits comprising two different main processor types.
  • Various electrical circuit architectures for operating a reader having more than one imaging module [0052] 10 are shown in FIGS. 2c-2 f.
  • In the architecture of FIG. 2[0053] c, electrical circuit 102 includes a pair of imaging modules 10 and a control circuit 140. Control circuit 140 includes a field programmable gate array (FPGA) 161, a multifunctional processor IC Chip 180 including a CPU 141 and frame grabber block 148, a system RAM 142 and a system ROM 143. Processor IC chip 180 may be, for example, a Dragonball or Anaconda processor chip of the type available from Motorola, Inc. Imaging modules 10 a and 10 b shown in block form in FIG. 2c correspond to the physical 2D imaging module 10-1 shown in FIGS. 3a-3 c. System RAM 142 and system ROM 143 are in communication with processor IC Chip 180 via system bus 150. In general, FPGA 161 of circuit 102 is programmed to execute a multiplexer function indicated by block 155. In response to module select signals received from multifunctional processor IC chip 180, multiplexer 155 receives image data over one of data lines 159 a, 159 b from a selected one of module 10 a and module 10 b and sends the data to frame grabber block 148 of processor IC chip 180. Multiplexer 155 can be deleted if imaging modules 10 are selected to include image sensor IC chips which generate high impedance (tri-statable) synchronization signals when not actuated. FPGA 161, like all other FPGAs described herein could be replaced by another programmable circuit such as a programmable logic device (PLD), or a complex programmable logic device (CPLD) or another device such as an ASIC or processor chip (e.g. such as chip 179 or chip 180).
  • Referring to the operation of electrical circuit [0054] 102 in further detail, processor IC chip 180 sends an image capture enable signal to FPGA 161 via line 170 when trigger 13 t is actuated and to an appropriate one of modules 10 a and 10 b via one of lines 151 a, 151 b. The selected module, 10 a or 10 b, then sends synchronization signals, and the digital clocking signals as described previously to FPGA 161 and IC chip 180, over the appropriate one of lines 152 a, 152 b.
  • FPGA [0055] 161 transmits image data to multifunctional processor IC Chip 180 over data line 171 which in turn transmits image data to RAM 142 over system bus 150. Lines 151 a, 151 b may carry PWM interface illumination control signals as described previously in connection with electrical circuit 100.
  • In the architecture of FIG. 2[0056] d, electrical circuit 103 includes a plurality of N imaging modules 10, which may be incorporated in a single housing 7. Electrical circuit 103 includes a control circuit 140 having an FPGA 162, a processor IC Chip 179, a system RAM 142 and a system ROM 143. FPGA 162 is in communication with processor IC Chip 179 via system bus 150. Processor IC chip 179 and FPGA 162 are also in communication via bus arbitration communication line 167 which carries bus hand shaking (e.g. bus request, bus grant) signals.
  • Various embodiments of FPGA [0057] 162 are described with reference to FIGS. 2h and 2 i. In the embodiment of FIG. 2h, FPGA 162 c is programmed to include multiplexer block 162 m, control register 162 c, and a solitary frame grabber block 162 f Image capture enable signals for actuating image capture via one of modules e.g. 10 a are received at control register 162 in response to an actuation of trigger 13 t. Control register 162 c on receipt of an image capture enable signal sends the image capture enable signal to the selected one module 10 and utilizes the signal to associate frame grabber block 162 f to the selected module e.g. 10 a. It will be understood that control register 162 c can be adapted to send during one type of frame capture method, e.g. illumination actuation signals to a second imaging module, 10 c while actuating an image sensor 32 of a first module, e.g. 10 a without sending illumination actuation signals to first module 10 a.
  • In the embodiment of FPGA [0058] 162 illustrated in FIG. 2i, multiplexer block 162 m is deleted. FPGA 162 of FIG. 2i includes N frame grabber blocks 162 f. With use of FPGA 162 configured as shown in FIG. 2i, electrical circuit 103 can be operated to capture several frames of image data contemporaneously by contemporaneous actuation of each of several imaging modules e.g. 10 a and 10 c.
  • Referring to further aspects of electrical circuit [0059] 103, of FIG. 2d processor IC chip 179 can be provided by general purpose processor IC chip such as a Power PC IC chip of the type available from Motorola. Other suitable IC chips for providing the function of IC chip 179 of circuit 103 include, for example, an Intel SA 1110 chip and an Xscale family of processor IC chips, also available from Intel.
  • Referring now to FIG. 2[0060] e, electrical circuit 104 controls a pair of imaging modules wherein a first imaging module 10-1 is a 2D imaging module and a second imaging module 10-2 is a 1D imaging module. Control circuit 140 includes CPU 141, 2D frame grabber block 148, FPGA 164, system RAM 142 and system ROM 143. Frame grabber block 148 and CPU 141 are both incorporated on multifunctional processor IC chip 180 (e.g. a Motorola Dragonball IC chip), as described previously in connection with FIG. 2a. A main program executed by CPU 141 of multifunctional processor IC chip 180 controls operation of both first imaging module 10-1 and second imaging module 10-2.
  • For capture of a 2D image, processor IC chip [0061] 180 in response to actuation of trigger 13 t sends an image capture enable signal to module 10-1 via a communication line 151. During image capture, 2D imaging module 10-1 sends synchronization and digital clocking signals to frame grabber block 148 via communication line 152 which as explained previously and like all lines represented herein may represent a plurality of physical lines. Further, 2D imaging module 10-1 sends digitized image data to frame grabber block 148 via data line 159 a. Processor IC chip 180 stores image data in RAM 142 by writing image data stored in buffer memory locations of frame grabber block 148 to RAM 142 via system bus 150. An illumination control signal communication line is also typically interposed between IC chip 180 and module 10-1. An illumination signal communication line can be considered to be represent by line 151.
  • For capture of a 1D “slice” image representation, processor IC chip [0062] 180 sends a 1D image capture enable signal to FPGA 164 via system bus 150. Processor IC chip 180 and FPGA 164 are further in communication via communication line 167 which carries bus handshaking (e.g. bus request and bus grant) signals. On receipt of an image capture enable signal from processor IC chip 180, FPGA 164 sends digital clocking signals to A/D converter 136 via line 156, to image sensor 32 via line 154, and illumination control signals to illumination LEDs 18 as shown in the physical form view of FIG. 3e via line 153. Image sensor 32 sends analog image signals to A/D converter 136 via output line 155 and A/D converter 136 in turn converts the signals into N (typically 8) bit grey scale pixel values. A/D converter 136 sends the digitized image data to FPGA 164 which stores the image data to RAM 142.
  • As indicated by the block diagram of FIG. 2[0063] j, FPGA 164 of electrical circuit 104 includes frame grabber block 164 f for fast transfer of image data into system RAM 142, image sensor illumination and control block 164 c for controlling LEDs 18 and for developing synchronization signals, and clock 164 k for generating digital clocking pulses.
  • Another electrical circuit for controlling a plurality of imaging modules is described with reference to FIG. 2[0064] f. Electrical circuit 105 includes a pair of frame grabbing FPGAs 165, 166. First FPGA 165 is dedicated for frame capture of image data generated by first imaging module 10 a while second frame grabbing FPGA 166 is dedicated for capture of image data generated by second imaging module lob. The architecture of FIG. 2f is especially well suited for contemporaneous capture of multiple frames of image data via contemporaneous actuation of image sensors of two separate imaging modules 10 a and 10 b.
  • Control circuit [0065] 140 of electrical circuit 105 includes CPU 141 which may be incorporated on a general purpose 32 bit processor IC chip 179, frame grabbing FPGAs 165 and 166, system RAM 142 and system ROM 143. Processor IC chip 179 may transmit image capture enable instruction via communication lines 151 a and 151 b. Processor IC chip 179 may also send illumination control signals via lines 151 a and 151 b. For example, in a mode of operation that will be described herein processor IC chip may send an image capture enable signal to module 10 a over line 151 a (and an illumination disabling signal over line 151 a), and an illumination control signal to module 10 b over line 151 b with use of a specific image capture method wherein images are captured in such a manner so as to be substantially impervious to specular reflection decode failures.
  • In a further aspect of electrical circuit [0066] 105, imaging modules 10 a and 10 b send synchronization and digital clocking signals to FPGAs 165 and 166 respectively, via lines 152 a and 152 b, and image data to FPGAs 165 and 166 respectively over, data lines 159 a and 159 b. Processor IC chip 179 is in communication with frame grabbing FPGAs 165 and 166 via system bus 150 and via bus arbitration communication lines 167 a and 167 b over which bus handshaking signals (e.g. bus request, bus grant) are sent. While the invention in a major aspect relates to optical readers having multiple imaging modules, another commercial optical product according to another aspect of the invention is described with reference to FIGS. 5a-5 e.
  • In FIG. 5[0067] a an optical reader is shown having an electrical circuit 100 as described in FIGS. 2a wherein an imaging module 10 is incorporated on a compact flash card 510. Compact flash card 510 carrying circuit 100 as will be explained herein may be interfaced with a host processor assembly such as a personal data assistant (PDA) 540 or a personal computer (PC) 550.
  • As best seen in FIGS. 5[0068] c or 5 d, PDA 540 can include a compact flash slot 544 for receiving a compact flash card 510, which incorporates an imaging module 10.
  • Various features of compact flash card [0069] 510 incorporating module 10 are described with reference to FIG. 5a. As seen in FIG. 5a, electrical circuit 100 including multifunctional frame grabbing IC chip 180, system RAM 142, and system ROM 143 are incorporated on compact flash card 510 which further carries imaging module 10. Imaging module 10 may be a 2D imaging module as described with reference to FIG. 3a-3 c, or a 1D module, e.g. as described with reference FIG. 3e. Card 510 typically further comprises a protective cover (not shown).
  • Compact flash card [0070] 510 including electrical circuit 100 as indicated by block diagram FIG. 5b, is interfaced to a host processor system 68. As will be explained further herein, host processor system 68 can be included in e.g. a personal data assistant (PDA) 540 as shown in FIG. 5b or a personal computer (PC) 550 as shown in FIG. 5e.
  • Referring to further aspects of the block diagram of FIG. 5[0071] b, circuit 515 includes FPGA 520 which facilitates communication between electrical circuit 100 and host system 68. A physical form view of FPGA 520 is shown in physical form diagram of FIG. 5a. FPGA 520 may be programmed to perform a variety of functions. FPGA 520 may be programmed to (1) communicate with host 68 to inform host 68 that compact flash card 510 is connected to host 68 when it is first connected, (2) to perform all compact flash bus timing, and (3) to provide all buffer interfaces required to receive from circuit 100 data in a form supported by electrical circuit 100 and to allow that data to be received in a compact flash format as is required by host 68.
  • FPGA [0072] 520 can be connected via a communication line 504 to UART interface 108 of multifunctional processor IC chip 180. UART interface 108 may transmit data in e.g. an RS 232 format while FPGA 520, appropriately programmed, converts that data into a compact flash format. Further connected to FPGA 520 via line 526 is a compact flash female connector 530, which is formed on an edge of compact flash card 510, and comprises a plurality of sockets 530 s as indicated in the exploded section view of FIG. 5a.
  • Compact flash card [0073] 510 including an electrical circuit 100 having imaging module 10 can operate in a first integrated mode or a second “free-standing” which in one specific embodiment can be considered a “tethered” mode. An integrated mode of operation of card 510 is described with reference to FIGS. 5c and 5 d. In an integrated mode, card 510 is integrated into a device such as a PDA 540. To electrically and mechanically connect card 510 to a host, device female end 530 is connected to male end compact flash connector 531, comprising a plurality of pins, within a housing of the host device.
  • A free-standing mode of operation is illustrated with reference to FIG. 5[0074] e. In a freestanding mode of operation, compact flash card 510 including module 10 is positioned in a position spaced apart from a host device e.g. device 550. Compact flash card 510 may rest on a table top or else may be mounted to a fixed member spaced apart from the host device e.g. PC 550. In a free-standing mode, card 510 may be connected to a host device via a flexible cable connector 560. When card 510 is connected to a host assembly via a flexible connector, card 510 may be considered to be operating in a “tethered” mode. Card 510 may also be wirelessly connected to a host via e.g. a RF link. In the embodiment of FIG. 5e cable connector 560 is interfaced to host device 550 on one end and to compact flash card 510 on another end. Cable connector 560 includes male compact flash connector 531 for facilitating communication between connector 560 and card 510. Card 510 can further include feet 565 of height substantially the same as connector 531 disposed on an under surface therof so that card 510 can rest substantially horizontally on a table surface when operating in a free-standing mode. Host device 550 in the free-standing mode diagram illustrated by FIG. 5e is shown as a PC. It will be understood that a host device in a free-standing mode could also be provided by PDA 540 or another mobile or non-mobile computer device.
  • The multiple-module electrical circuits [0075] 102, 103, 104, and 105 described herein can be implemented for operation of imaging modules spread out over several housings or for operation of imaging modules incorporated in a housing 7 of multiple imaging module reader 5-1, 5-2, 5-3, 5-4, 5-5, 5-6, and 5-7, 5-8 and 5-9 as shown in physical form views 1 a-1 m.
  • Methods for operating a multiple imaging module optical reader according to the invention will now be described in greater detail. Flow diagrams of FIGS. 4[0076] a-4 c illustrate operation of a multiple imaging module optical reader having at least two imaging modules 10 a, 10 b.
  • In the reader methods described herein “actuation of an image sensor” generally refers to at least one step in the process of sending appropriate signals to an image sensor [0077] 32 to cause exposure of image sensor pixels image sensor to light and to cause clocking out of electrical signals corresponding to light received at pixels of the array. These steps are described in greater detail in for example, U.S. application Ser. No. 09/766,922, filed Jan. 22, 2001, entitled “Optical Reader Having Reduced Parameter Determination Delay,” incorporated herein by reference. “Actuation of illumination” herein generally refers to the step of sending electrical current to a light source e.g. 16, 18 to turn on the light source. Referring to the reader operating method of FIG. 4a, at block 404 after a trigger 13 t is pulled (block 402) control circuit 140 actuates image sensor 32 of first imaging module 10 a and illumination light sources 16 of first imaging module 10 a during a frame capture period in which a first frame of image data is captured. At block 406 control circuit 406 subjects the first captured frame of image data to a decode attempt. If the decode attempt is not successful (block 408), control circuit 140 executes block 410 to capture a second frame of image data. Control circuit 140 actuates image sensor 32 and illumination light sources 16 of second imaging module 10 b when capturing a second frame of image data. Instead of capturing a second frame of image subsequent to subjecting a first frame to a decode attempt (406) control circuit 140 can capture a second frame as described in connection with block 410 prior to the decode attempt of block 406. Control circuit 140 can capture a first frame as described in connection with block 404 and a second frame as described in connection with block 410 in any order and can capture the frames contemporaneously. At block 412 control circuit 140 subjects the indicia representation of the second frame to a decode attempt, and at block 410 outputs a decoded out data message if decoding is successful (block 414). The attempt to decode a decodable indicia may be in accordance with a method for decoding decodable indicia such as are described in U.S. Ser. No. 09/904,697, filed Jul. 13, 2001, entitled “Applying a Color Imager To A Hand Held Reader For Indicia Reading Image Capture,” incorporated by reference. The reader control method described with reference to the flow diagram of FIG. 4a is highly useful wherein specular reflection decode failures can be expected. Referring to the example of two module reader 5-1 shown in FIGS. 1a and 1 b note that if there may be a specular reflection decode failure when a first frame corresponding to a mirrored planar surface is captured via actuation of first module 10 a then there likely will not be a specular reflection decode failure when a second frame captured via actuation of second module 10 b is subjected to decoding.
  • A “wait for trigger pull” control loop, as described in connection with block [0078] 402, FIG. 4a, block 420, FIG. 4b, block 444, FIG. 4c will now be described in greater detail. When a trigger 13 t of reader 5 is actuated, control circuit 140 generates a trigger signal to cause branching of program control as described in FIGS. 4a, 4 b, and 4 c. According to the invention, a trigger signal can also be generated automatically in response to a decodable indicia being presented in a field of view of a module of reader 5. A method of automatically generating what can be considered a trigger signal based on detected edge transitions without a physical trigger pull is described in copending application Ser. No. 09/432,282, filed Nov. 2, 1999, entitled “Indicia Sensor System for Optical Reader,” incorporated by reference. It will be understood that any of the control loops indicated by blocks 402, 420, and 440 can be substituted for by a control loop wherein control circuit 140 waits for trigger signal automatically generated when a decodable indicia 15 moved into a filed of view of a module of reader 5.
  • In one possible variation of the invention, first and second imaging modules [0079] 10 a, 10 b, and possibly all N modules of an N imaging module optical reader are configured so that each module has a different best focus distance. For example, module 10 c of reader 5-2 can be configured to a best focus distance of about 3 inches, module 10 a can be configured to have a best focus distance of about 6 inches, while module 10 b can be configured to have a best focus distance of about 9 inches. It will be seen that configuring a reader of the invention so that each of the modules has a different best focus distance increases the overall depth of field of the reader.
  • A multiple module reader of the invention wherein each module has a different best focus distance can be operated in accordance with the flow diagram of FIG. 4[0080] a to the end that the reader automatically reads target indicia disposed at a wide range of reader-to-target distance. If an object being read is disposed at a distance closer to the best focus distance of a second module but a substantial distance from a best focus distance of a first module, the reader operating in accordance with the flow diagram of FIG. 4a may successfully decode the indicia at block 412 (second frame decode attempt) after failing to decode the indicia at block 406 (first frame decode attempt).
  • While block [0081] 404 of the flow diagram of FIG. 4a and other operating blocks herein refers to capturing a “first” frame of image data, it will be understood that a “first” captured frame as referred to herein is not necessarily the initial frame captured by a reader subsequent to actuation of trigger 13 t For example, as explained in application Ser. No. 09/766,922, filed Jan. 22, 2001, entitled “Optical Reader Having Reduced Parameter Determination Delay,” and incorporated herein by reference, optical readers commonly process one or more “test” frames of image data to establish exposure levels and other operating parameters.
  • Another method for operating a multiple imaging module optical reader is described with reference to the flow diagram of FIG. 4[0082] b. After trigger 13 t is pulled at block 420 control circuit 140 captures a first frame of image data at block 422. Control circuit 140 captures a first frame image data via actuation of an image sensor 32 of first module 10 a and illumination light source 16 of first imaging module 10 a. That is, image sensor 32 of first module 10 a is actuated to generate image signals while a target is illuminated by illumination light sources 16 of first imaging module 10 a. At block 424 control circuit 140 subjects the first frame of capture image data to a decoding attempt. If decoding is not successful (block 426), then control circuit 140 automatically proceeds to block 428 to capture a second frame of image data Control circuit 140 can also capture a second frame of image data as described in connection with block 428 prior to subjecting a first frame of image data to a decode attempt (block 424). Control circuit 140 can capture a first frame as described in connection with block 422, a second frame as described in block 428, and a third frame (block 434) in any order. Control circuit 140 can capture first, second, and third frames of image data (blocks 422, 428 and 434) contemporaneously. When control circuit 140 captures a second frame of image data at block 428 control circuit 140 once again actuates image sensor 32 of first imaging module 10 a as in the step of block 422. However, when capturing a second frame of image data via actuation of first image sensor, control circuit 140 actuates illumination light sources 16 of second imaging module 10 b without actuating illumination sources 16 of first imaging module 10 a. Because image sensor 32 of first module 10 a and illumination sources 16 of second module 10 b are substantially spaced apart, the frame of image data captured at block 428 is substantially impervious to specular reflection read failures. The operating method described with reference to FIG. 4b can be utilized with any use of readers 5-1, 5-2, 5-3, 5-4, 5-5, 5-6, 5-7, 5-8, and 5-9. As indicated by block 434 a reader having three imaging modules 10 a , 10 b, and 10 c e.g. of reader 5-2 can be further configured so that the control circuit 140 captures a third frame of image by actuation of image sensor 32 of first module e.g., 10 a together with actuation of illumination light sources of third module 10 c.
  • A still further method for operating an optical reader having a plurality of imaging modules is described with reference to the flow diagram of FIG. 4[0083] c. Referring to the flow diagram of FIG. 4c control circuit 140 at block 446 captures first and second frames of image data The first frame of image data captured at block 446 may be captured via actuation of image sensor and illumination light sources of first imaging module e.g., module 10 a of reader 503, FIG. 1e. The second frame of image data captured at block 446 may be captured via actuation of image sensor 32 and illumination light sources 16 of second imaging module 10 c. Referring to further aspects of image capture block 446, control circuit 140 may capture first and second frames at block 446 sequentially (the first frame is captured in its entirety and then the second frame is captured) or contemporaneously (the capture of the second frame begins before capture of the first frame is complete). At block 448 control circuit 140 subjects the first captured frame to a decode attempt. If decoding fails, control circuit 140 proceeds to block 456 to combine the first captured frame captured by actuation of an image sensor of a first module 10 a with a second captured frame of image data captured via actuation of a second imaging module 10 c to generate a third image representation. At block 458 control circuit 140 subjects the third image representation derived from the first and second frames to a decoding attempt. If decoding is successful, control circuit 140 outputs the decoded out message at block 462.
  • At several stages of the operating methods described herein, multiple imaging module reader [0084] 5 executes the steps of attempting to decode decodable indicia and branching control of an operating program if the decoding attempt is not successful. In a further aspect of the invention, the step of attempting to decode in any one of the operating programs described with reference to FIGS. 4a, 4 b, and 4 c can be substituted for or supplemented with the step of preliminarily evaluating image data to determine whether decoding will likely be successful. A step of preliminarily evaluating image data can eliminate the need to actually launch decoding processing to determine whether indicia representation(s) within a frame of image data can be decoded.
  • The step of preliminarily evaluating image data to determine whether decoding will be successful can take on a variety of forms. In one example of the preliminary image data evaluating step, a preliminary image data evaluating step can include the step of examining gray scale values of a frame of image data to determine if the image data has become saturated. If a saturation condition (sometimes referred to as a “white out” condition) is present there is a substantial likelihood of specular reflection misread or other type of misread attributable to excessive illumination. A saturated condition can be considered to be present for example if a sum total of all gray scale values exceeds a predetermined value, or if an average gray scale value exceeds a predetermined threshold white level. All pixel values may be evaluated during the preliminary evaluation step. More typically, however, a sample of pixel values comprising less than all pixel values of a frame are evaluated to speed processing. The sampling of pixels may be predetermined and/or adaptive. [0085]
  • The step of preliminarily evaluating image data to determine whether decoding will be successful can also include the step of estimating a module-to-target distance. If an estimated module-to-target distance exceeds a best focus distance by a threshold amount (which may be a predetermined threshold), control circuit [0086] 140 may preliminarily determine that decoding will likely not be successful without actually subjecting image data of a frame to a decode attempt. A method for generating a signal that varies with module to target distance is described in commonly assigned U.S. Pat. No. 5,773,810, entitled “Method of Generating Real Time Degree of Focus Signal For Hand Held Imaging Device,” incorporated herein by reference.
  • Referring to the operating method described with reference to FIG. 4[0087] c in further detail, a number of different methods may be utilized to execute block 456 (combining the first and second frame of image data).
  • In one method for combining a first frame and a second frame of image data, cross correlation image combination methods can be utilized. In a cross correlation image combination method statistical analyses are executed to compare two or more frames of image data and frames of image data are shifted relative to one another until correlation is optimized. [0088]
  • In another method for combining first and second frames of image data, areas of overlap between two frames of image data e.g. [0089] 610, 614 are determined and then the image data contribution from one of the frames corresponding to the overlapping area is deleted or modified in a manner depending on the overlapping region image data of the other frame to generate a third image representation 630. In the example of FIG. 4d, showing first, second, and third frames of image data 610, 612, and 614, overlapping regions 619 and 621 are defined between the first and third frames 610 and 614 and between the third and second frames 614 and 612. Overlapping regions of image data 619, 621 are regions e.g. of image data from two separate frames of image data that correspond to a common region of a target substrate, s.
  • The area of overlap between frames of image data captured via actuation of the image sensors of neighboring imaging modules can be determined based on known characteristics of the neighboring imaging modules [0090] 10 of reader 5, such as the spacing between imaging modules of reader 5 (e.g. modules 10 a and 10 c of reader 5-3), power of imaging optics 40 of the particular imaging module 10, and the respective module-to-target distances of the neighboring modules. A distance of a module to a target can be estimated via analysis of captured image data, for example by a method for developing a degree of focus signal as is described in commonly assigned U.S. Pat. No. 5,773,810, entitled “Method For Generating Real Time Degree of Focus Signal For Hand Held Imaging Device,” incorporated herein by reference. It can be seen that the image frame diagram of FIG. 4d may correspond to parallel-axis reader 5-3 as shown in FIG. 1e having a plurality of imaging modules comprising parallel imaging axes while the image frame diagram of FIG. 4e (wherein frames 652 and 654 are distorted) may correspond to the diverging axis three module reader 5-4 as shown in FIGS. 1g and 1 h.
  • Referring to the frame diagram of FIG. 4[0091] e in further detail, overlapping regions 659 and 661 are defined between first frame 652 and third frame 656 and between third frame 656 and second frame 654. When combining two frames of image data in the example of FIG. 4e, it is particularly important to correct for skew errors (sometimes referred to as distortion errors) when combining frames of image data and when calculating regions of overlap between two frames of image data In the example of FIG. 4e, skew errors can readily be corrected for by, in part, utilizing a skew correction factor determined from the known relative angles between two imaging axes of a multiple module reader such axes 11 a and 11 c of reader 5-4, and the spacing between modules of a multiple module reader such as reader 5-4. Further skew correction of a frame of image data can be carried out in a manner described in copending application Ser. No. 09/954,081, filed Sep. 17, 2001, entitled “Imaging Device Having Indicia-Controlled Image Parsing Mode,” incorporated herein by reference. In that application, a method is described wherein graphical analysis and interpolation processing are employed to determine a distortion factor affecting a frame of image data, and further wherein the determined distortion factor is utilized to back out distortion from an image.
  • Still further, graphical feature analysis can be utilized in combining frames of image data. If a common graphical feature (e.g. a straight line, a bulls eye, a circle, a character) is found in two frames of image data, the common graphical feature can be utilized to establish a common orientation, spacing, and skew basis between the frames of image data to be combined. [0092]
  • While the present invention has been explained with reference to the structure disclosed herein, it is not confined to the details set forth and this invention is intended to cover any modifications and changes as may come within the scope of the following claims. [0093]

Claims (47)

    I claim:
  1. 1. An optical reader comprising:
    a housing defining at least one cavity;
    a first imaging module mounted in said at least one cavity;
    a second imaging module mounted in said at least one cavity;
    wherein each of said first and second modules includes an image sensor, a support assembly, and at least one illumination light emitting diode;
    a control circuit in communication with each of said first and second imaging modules;
    wherein said control circuit is programmed, in response to a trigger signal, to:
    (a) capture a first frame of image data via actuation of said at least one illumination light emitting diode to provide flood illumination, and said image sensor of said first imaging module;
    (b) determine whether said first frame of image data includes decodable indicia;
    (c) automatically subject to a decode attempt a second frame of image data if said determination step (b) indicates that decodable indicia is not or is likely not represented in said first frame of image data, wherein said second frame of image data is captured via actuation of said at least one light emitting diode to provide flood illumination, and said image sensor of said second imaging module.
  2. 2. The reader of claim 1, wherein said control circuit in determining whether decodable indicia is represented in said first frame of image data attempts to decode decodable indicia represented in said first frame of image data.
  3. 3. The reader of claim 1, wherein said control circuit captures said second frame of image data contemporaneously while capturing said first frame of image data.
  4. 4. The reader of claim 1, wherein said control circuit in determining whether decodable indicia is represented in said first frame of image data preliminarily evaluates image data of said first frame without attempting to decode decodable indicia represented therein.
  5. 5. The reader of claim 4, wherein said control circuit in preliminarily evaluating said image data evaluates said image data to determine whether a saturation condition is present.
  6. 6. The reader of claim 1, wherein said first imaging module is a one dimensional imaging module and wherein said second imaging module is a imaging module.
  7. 7. The reader of claim 1, wherein said first and second imaging modules are configured to have first and second best focus distances, wherein said first best focus distance is at least 1 inch apart from said second best focus distance.
  8. 8. The reader of claim 1, wherein said trigger signal is an automatically generated trigger signal generated by decodable indicia being moved in a field of view of said reader.
  9. 9. The reader of claim 1, further comprising a trigger, wherein said trigger signal is generated when said trigger is pulled.
  10. 10. An optical reader comprising:
    a housing defining at least one cavity;
    a first imaging module mounted in said at least one cavity;
    a second imaging module mounted in said at least one cavity;
    wherein each of said first and second modules includes an image sensor, a support assembly, and at lest one illumination light emitting diode;
    a control circuit in communication with each of said first and second imaging modules;
    wherein said control circuit is programmed, in response to a trigger signal, to:
    (a) capture a first frame of image data via a actuation of said at least one illumination light emitting diode thereby providing flood illumination and said image sensor of said first imaging module;
    (b) determine whether said first frame of image data includes decodable indicia;
    (c) automatically subject to a decode attempt a second frame of image data if said determination step (b) indicates that decodable indicia is not or is likely not represented in said first frame of image data, wherein said second frame of image data is captured via actuation of said at least one light emitting diode of said second imaging module thereby providing flood illumination and said image sensor of said first imaging module, wherein no illumination light emitting diode of said first imaging module is actuated when said second frame of image data is captured.
  11. 11. The reader of claim 10, wherein said control circuit in determining whether decodable indicia is represented in said first frame of image data attempts to decode decodable indicia represented in said first frame of image data.
  12. 12. The reader of claim 10, wherein said control circuit captures said second frame of image data contemporaneously while capturing said first frame of image data.
  13. 13. The reader of claim 10, wherein said control circuit in determining whether decodable indicia is represented in said first frame of image data preliminarily evaluates image data of said first frame without attempting to decode decodable indicia represented therein.
  14. 14. The reader of claim 13, wherein said control circuit in preliminarily evaluating said image data evaluates said image data to determine whether a saturation condition is present.
  15. 15. The reader of claim 10, wherein said first imaging module is a one dimensional imaging module and wherein said second imaging module is a two dimensional imaging module.
  16. 16. The reader of claim 10, wherein said first and second imaging modules are configured to have first and second best focus distances, wherein said first best focus distance is at least 1 inch apart from said second best focus distance.
  17. 17. The reader of claim 10, wherein said trigger signal is an automatically generated trigger signal generated by decodable indicia being moved in a field of view of said reader.
  18. 18. The reader of claim 10, further comprising a trigger, wherein said trigger signal is generated when said trigger is pulled.
  19. 19. An optical reader comprising:
    a housing defining at least one cavity;
    a first imaging module mounted in said at least one cavity;
    a second imaging module mounted in said at least one cavity;
    wherein each of said first and second modules includes an image sensor, a support assembly, and at lest one illumination light emitting diode;
    a control circuit in communication with each of said first and second imaging modules;
    wherein said control circuit is programmed, in response to a trigger signal, to:
    (a) capture a first and second frame of image data, wherein said first frame of image data is captured via actuation of said at least one light emitting diode thereby providing flood illumination and said image sensor of said first imaging module, and said second frame of image data is captured via actuation of said at least one light emitting diode thereby providing flood illumination and said image sensor of said second imaging module;
    (b) determine whether said first and second frames include decodable indicia;
    (c) automatically combine said first frame and said second frame to generate a third image representation if said determination step (b) indicates that decodable indicia is not or is likely not represented in said first and second frames of image data; and to
    (d) subject said third image representation to a decode attempt.
  20. 20. The reader of claim 19, wherein said control circuit in determining whether decodable indicia is represented in said first and second frames of image data attempts to decode decodable indicia represented in said first and second frames of image data.
  21. 21. The reader of claim 19, wherein said control circuit captures said second frame of image data contemporaneously while capturing said first frame of image data.
  22. 22. The reader of claim 19, wherein said control circuit in determining whether decodable indicia is represented in said first and second frames of image data preliminarily evaluates image data of said first and second frames of image data without attempting to decode decodable indicia represented therein.
  23. 23. The reader of claim 22, wherein said control circuit in preliminarily evaluating said image data evaluates gray scale pixel values of said image data to determine whether a saturation condition is present.
  24. 24. The reader of claim 19, wherein said control circuit in combining said first and second frames of image data determines an area of overlap between said first and second frames of image data.
  25. 25. The reader of claim 19, wherein said control circuit in combining said first and second frames of image data generates a signal indicative of a module-to-target distance of at least one of said modules.
  26. 26. The reader of claim 19, wherein said control circuit in combining said first and second frames of image data combines said first and second frames in a manner dependent on an angle between imaging axes of said first and second imaging modules.
  27. 27. The reader of claim 19, wherein said control circuit in combining said first and second frames of image data identifies a common graphical element commonly represented in said first and second frames of image data.
  28. 28. The reader of claim 19, wherein said first and second imaging modules are configured to have first and second best focus distances, wherein said first best focus distance is at least 1 inch apart from said second best focus distance.
  29. 29. The reader of claim 19, wherein said trigger signal is an automatically generated trigger signal generated by decodable indicia being moved in a field of view of said reader.
  30. 30. The reader of claim 19, further comprising a trigger, wherein said trigger signal is generated when said trigger is pulled.
  31. 31. An optical reader comprising:
    a control circuit;
    a first image sensor in communication with the control circuit, the first image sensor having a first imaging axis;
    a second image sensor in communication with the control circuit, the second image sensor having a second imaging axis, the second imaging axis different from the first imaging axis; and
    a first illumination source in communication with the control circuit, the first illumination source configured to provide flood illumination, the first illumination source emitting light along a first path.
  32. 32. The optical reader of claim 31 wherein the first image sensor includes a CCD image sensor.
  33. 33. The optical reader of claim 31 wherein the first image sensor includes a CMOS image sensor.
  34. 34. The optical reader of claim 32, wherein the second image sensor includes a CCD image sensor.
  35. 35. The optical reader of claim 32, wherein the second image sensor includes a CMOS image sensor.
  36. 36. The optical reader of claim 31, wherein the illumination source includes at least one light emitting diode.
  37. 37. The optical reader of claim 31, wherein, in response to a trigger signal, the control circuit activates the first illumination source, thereby illuminating a target optical indicia, the control circuit activates the first image sensor, the first image sensor capturing a first frame of image data representative of the target optical indicia, the first image sensor communicating the first frame of image data to the control circuit, the control circuit attempting to decode the first frame of image, the control circuit activating the second image sensor, the second image sensor capturing a second frame of image data representative of the target optical indicia, the second image sensor communicating the second frame of image data to the control circuit, the control circuit attempting to decode the second frame of image data.
  38. 38. The optical reader of claim 31 further including a second illumination source in communication with the control circuit, the second illumination source configured to provide flood illumination, the second illumination source emitting light along a second path different from the first path.
  39. 39. The optical reader of claim 38, wherein response to a trigger signal, the control circuit illuminates the target optical indicia with the first illumination source and captures a first frame of image data using the first image sensor.
  40. 40. A method of operating an optical reader having a plurality of image sensors and at least one illumination source, comprising the steps of:
    activating the at least one illumination source, thereby illuminating a target optical indicia;
    activating the plurality of image sensors, the activation of each image sensor including the capturing of a frame of image data by each image sensor; and
    processing the frames of image data, wherein the frames of image data are processed in a predetermined order, wherein the processing includes determining if a frame of image data includes decodable indicia, wherein no further frames of image data are processed if the determination is made that a frame of image data includes decodable indicia.
  41. 41. The method of claim 40 wherein the step of activating the plurality of image sensors includes the substantially simultaneous capture of a frame of image data by each image sensor.
  42. 42. The method of claim 40 wherein the step of activating the plurality of image sensors includes the activating at least two of the plurality of image sensors in a predetermined order.
  43. 43. The method of claim 42 wherein the step of processing the frames of image data includes processing the frames of image data in a predetermined order.
  44. 44. The method of claim 43 wherein the step of processing the frames of image data includes processing the frames of image data in the order in which they were captured.
  45. 45. The method of claim 40 wherein the at least one illumination sources includes a plurality of illumination sources, at least one illumination source of the plurality of illumination sources being associated with each image sensor of the plurality of image sensors.
  46. 46. The method of claim 45 wherein the step of activating the plurality of image sensors includes the substantially simultaneous capture of a frame of image data by each image sensor.
  47. 47. The method of claim 45 wherein the step of activating the plurality of image sensors includes the activating at least two of the plurality of image sensors in a predetermined order.
US10782569 2002-06-04 2004-02-19 Optical reader having a plurality of imaging modules Abandoned US20040164165A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US10161950 US20030222147A1 (en) 2002-06-04 2002-06-04 Optical reader having a plurality of imaging modules
US10782569 US20040164165A1 (en) 2002-06-04 2004-02-19 Optical reader having a plurality of imaging modules

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US10782569 US20040164165A1 (en) 2002-06-04 2004-02-19 Optical reader having a plurality of imaging modules
US11187608 US8074887B2 (en) 2002-06-04 2005-07-22 Optical reader having a plurality of imaging modules
US13323147 US8596542B2 (en) 2002-06-04 2011-12-12 Apparatus operative for capture of image data
US14093624 US9224023B2 (en) 2002-06-04 2013-12-02 Apparatus operative for capture of image data
US14979765 US20160110577A1 (en) 2002-06-04 2015-12-28 Apparatus operative for capture of image data

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US10161950 Continuation US20030222147A1 (en) 2002-06-04 2002-06-04 Optical reader having a plurality of imaging modules

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US11187608 Continuation-In-Part US8074887B2 (en) 2002-06-04 2005-07-22 Optical reader having a plurality of imaging modules

Publications (1)

Publication Number Publication Date
US20040164165A1 true true US20040164165A1 (en) 2004-08-26

Family

ID=29583521

Family Applications (3)

Application Number Title Priority Date Filing Date
US10161950 Abandoned US20030222147A1 (en) 2002-06-04 2002-06-04 Optical reader having a plurality of imaging modules
US10782569 Abandoned US20040164165A1 (en) 2002-06-04 2004-02-19 Optical reader having a plurality of imaging modules
US11187608 Active 2025-09-15 US8074887B2 (en) 2002-06-04 2005-07-22 Optical reader having a plurality of imaging modules

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US10161950 Abandoned US20030222147A1 (en) 2002-06-04 2002-06-04 Optical reader having a plurality of imaging modules

Family Applications After (1)

Application Number Title Priority Date Filing Date
US11187608 Active 2025-09-15 US8074887B2 (en) 2002-06-04 2005-07-22 Optical reader having a plurality of imaging modules

Country Status (1)

Country Link
US (3) US20030222147A1 (en)

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030226895A1 (en) * 2002-06-11 2003-12-11 Hand Held Products, Inc. Long range optical reader
US20040190085A1 (en) * 1999-09-17 2004-09-30 Silverbrook Research Pty Ltd Sensing device for coded data
US20050024510A1 (en) * 2003-02-17 2005-02-03 Silverbrook Research Pty Ltd Image sensor with digital frame store
US20050023351A1 (en) * 2003-08-01 2005-02-03 Mehul Patel Imaging and illumination engine for an optical code reader
US20050145698A1 (en) * 2003-12-02 2005-07-07 Havens William H. Method and apparatus for reading under sampled bar code symbols
US20060027659A1 (en) * 2003-08-01 2006-02-09 Symbol Technologies, Inc. Integrated exit window and imaging engine
US20060043194A1 (en) * 2004-08-31 2006-03-02 Edward Barkan Scanner and method for eliminating specular reflection
US20060163355A1 (en) * 2005-01-26 2006-07-27 Psc Scanning, Inc. Data reader and methods for imaging targets subject to specular reflection
US20060180670A1 (en) * 2004-12-01 2006-08-17 Psc Scanning, Inc. Triggering illumination for a data reader
US20060255144A1 (en) * 2003-01-09 2006-11-16 Meier Timothy P Decoder board for an optical reader utilizing a plurality of imaging formats
US20070063048A1 (en) * 2005-09-14 2007-03-22 Havens William H Data reader apparatus having an adaptive lens
US20070295814A1 (en) * 2006-06-22 2007-12-27 Denso Wave Incorporated Apparatus for optically reading information stored in graphic symbol
US20090021181A1 (en) * 2005-04-19 2009-01-22 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Led module and led lighting unit with a plurality of led modules
US20090026267A1 (en) * 2007-06-04 2009-01-29 Hand Held Products, Inc. Indicia reading terminal processing plurality of frames of image data responsively to trigger signal activation
US20090127343A1 (en) * 2007-11-20 2009-05-21 Chin-Chang Chiang Scan module support and electronic device thereof
US20100014784A1 (en) * 1999-09-17 2010-01-21 Silverbrook Research Pty Ltd. Sensing Device For Subsampling Imaged Coded Data
US20100127082A1 (en) * 2008-11-26 2010-05-27 Mark Drzymala Imaging reader with plug-in imaging modules for electro-optically reading indicia
US7770799B2 (en) 2005-06-03 2010-08-10 Hand Held Products, Inc. Optical reader having reduced specular reflection read failures
US7780089B2 (en) 2005-06-03 2010-08-24 Hand Held Products, Inc. Digital picture taking optical reader having hybrid monochrome and color image sensor array
US20110163165A1 (en) * 2010-01-07 2011-07-07 Metrologic Instruments, Inc. Terminal having illumination and focus control
US8074887B2 (en) * 2002-06-04 2011-12-13 Hand Held Products, Inc. Optical reader having a plurality of imaging modules
US8387881B2 (en) 2010-12-01 2013-03-05 Hand Held Products, Inc. Terminal with screen reading mode
US8537245B2 (en) 2011-03-04 2013-09-17 Hand Held Products, Inc. Imaging and decoding device with quantum dot imager
US8561903B2 (en) 2011-01-31 2013-10-22 Hand Held Products, Inc. System operative to adaptively select an image sensor for decodable indicia reading
US8596542B2 (en) 2002-06-04 2013-12-03 Hand Held Products, Inc. Apparatus operative for capture of image data
US8608071B2 (en) 2011-10-17 2013-12-17 Honeywell Scanning And Mobility Optical indicia reading terminal with two image sensors
US8628013B2 (en) 2011-12-13 2014-01-14 Honeywell International Inc. Apparatus comprising image sensor array and illumination control
US8636215B2 (en) 2011-06-27 2014-01-28 Hand Held Products, Inc. Decodable indicia reading terminal with optical filter
US8640958B2 (en) 2010-01-21 2014-02-04 Honeywell International, Inc. Indicia reading terminal including optical filter
US8640960B2 (en) 2011-06-27 2014-02-04 Honeywell International Inc. Optical filter for image and barcode scanning
US8646692B2 (en) 2011-09-30 2014-02-11 Hand Held Products, Inc. Devices and methods employing dual target auto exposure
US8720781B2 (en) 2005-03-11 2014-05-13 Hand Held Products, Inc. Image reader having image sensor array
US8733660B2 (en) 2005-03-11 2014-05-27 Hand Held Products, Inc. Image reader comprising CMOS based image sensor array
US8777108B2 (en) 2012-03-23 2014-07-15 Honeywell International, Inc. Cell phone reading mode using image timer
US8881983B2 (en) 2011-12-13 2014-11-11 Honeywell International Inc. Optical readers and methods employing polarization sensing of light from decodable indicia
US8978981B2 (en) 2012-06-27 2015-03-17 Honeywell International Inc. Imaging apparatus having imaging lens
US8985459B2 (en) 2011-06-30 2015-03-24 Metrologic Instruments, Inc. Decodable indicia reading terminal with combined illumination
USD734753S1 (en) 2014-04-17 2015-07-21 Faro Technologies, Inc. Laser scanning device
US9418270B2 (en) 2011-01-31 2016-08-16 Hand Held Products, Inc. Terminal with flicker-corrected aimer and alternating illumination

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7387253B1 (en) * 1996-09-03 2008-06-17 Hand Held Products, Inc. Optical reader system comprising local host processor and optical reader
US7748620B2 (en) 2002-01-11 2010-07-06 Hand Held Products, Inc. Transaction terminal including imaging module
US7219843B2 (en) * 2002-06-04 2007-05-22 Hand Held Products, Inc. Optical reader having a plurality of imaging modules
US7090132B2 (en) * 2002-06-11 2006-08-15 Hand Held Products, Inc. Long range optical reader
US7195164B2 (en) 2003-01-03 2007-03-27 Symbol Technologies, Inc. Optical code reading device having more than one imaging engine
US7021542B2 (en) * 2003-08-01 2006-04-04 Symbol Technologies, Inc. Imaging and illumination engine for an optical code reader
US20050271100A1 (en) * 2004-06-04 2005-12-08 Keith Everett System and method for controlling optical sources, such as laser diodes, and computer program product therefor
US7478753B2 (en) * 2004-08-31 2009-01-20 Symbol Technologies, Inc. System and method for aiming an optical code scanning device
US7721966B2 (en) * 2004-10-18 2010-05-25 Datalogic Scanning, Inc. System and method of optical reading employing virtual scan lines
US20080105745A1 (en) * 2006-09-19 2008-05-08 Ming Lei Devices and/or systems for illuminating barcodes
US7886979B2 (en) * 2006-09-19 2011-02-15 Microscan Systems, Inc. Methods for illuminating barcodes
US7857224B2 (en) * 2006-09-19 2010-12-28 Microscan Systems, Inc. Devices and/or systems for automatically imaging barcodes
US20080105749A1 (en) * 2006-09-19 2008-05-08 Ming Lei Methods for automatically imaging barcodes
US8794524B2 (en) * 2007-05-31 2014-08-05 Toshiba Global Commerce Solutions Holdings Corporation Smart scanning system
US8544736B2 (en) * 2007-07-24 2013-10-01 International Business Machines Corporation Item scanning system
US20090026270A1 (en) * 2007-07-24 2009-01-29 Connell Ii Jonathan H Secure checkout system
US8746557B2 (en) * 2008-02-26 2014-06-10 Toshiba Global Commerce Solutions Holding Corporation Secure self-checkout
EP2310896B1 (en) * 2008-07-30 2014-03-19 Optoelectronics Co., Ltd. One dimensional barcode reader using two dimensional image sensor
US8783573B2 (en) * 2008-12-02 2014-07-22 Hand Held Products, Inc. Indicia reading terminal having plurality of optical assemblies
EP2394236B1 (en) * 2009-02-04 2013-11-06 Datalogic ADC, Inc. Systems and methods for selectively masking a scan volume of a data reader
US8295601B2 (en) * 2009-08-12 2012-10-23 Hand Held Products, Inc. Indicia reading terminal having multiple exposure periods and methods for same
US8373108B2 (en) * 2009-08-12 2013-02-12 Hand Held Products, Inc. Indicia reading terminal operative for processing of frames having plurality of frame featurizations
US20110186639A1 (en) * 2010-02-04 2011-08-04 Metrologic Instruments, Inc. Contact aperture for imaging apparatus
US8177134B2 (en) * 2010-07-21 2012-05-15 Hand Held Products, Inc. Multiple range indicia reader with single trigger actuation
US8888003B2 (en) 2010-12-09 2014-11-18 Datalogic Ip Tech S.R.L. Method for decoding a two-dimensional optical code
US8520080B2 (en) 2011-01-31 2013-08-27 Hand Held Products, Inc. Apparatus, system, and method of use of imaging assembly on mobile terminal
US8629926B2 (en) 2011-11-04 2014-01-14 Honeywell International, Inc. Imaging apparatus comprising image sensor array having shared global shutter circuitry
USD682277S1 (en) * 2011-12-30 2013-05-14 Datalogic Ip Tech S.R.L. Coded information reader
WO2013107016A1 (en) * 2012-01-19 2013-07-25 Honeywell International Inc Apparatus comprising imaging system
US8991707B2 (en) 2012-05-21 2015-03-31 Symbol Technologies, Inc. Optical slot scanner having coaxial illuminaton
USD692004S1 (en) * 2012-08-31 2013-10-22 Megaviz Limited Barcode scanner and radio frequency identification reader combo
US9465967B2 (en) 2012-11-14 2016-10-11 Hand Held Products, Inc. Apparatus comprising light sensing assemblies with range assisted gain control
US9070007B2 (en) * 2013-01-11 2015-06-30 Datalogic ADC, Inc. Adjustable data reader with pivot mount
USD726186S1 (en) * 2013-10-25 2015-04-07 Symbol Technologies, Inc. Scanner
USD719574S1 (en) 2014-01-09 2014-12-16 Datalogic Ip Tech S.R.L. Portable terminal
USD737822S1 (en) * 2014-03-10 2015-09-01 Datalogic Ip Tech S.R.L. Optical module
US9411999B2 (en) * 2014-03-20 2016-08-09 The Code Corporation Barcode reader having multiple sets of imaging optics
USD805078S1 (en) 2015-05-07 2017-12-12 Datalogic Ip Tech S.R.L. Barcode reading module

Citations (90)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US29194A (en) * 1860-07-17 Improvement in hay-presses
US3978317A (en) * 1974-02-26 1976-08-31 Matsushita Electric Industrial Co., Ltd. Optical bar code reader
US4057784A (en) * 1976-09-27 1977-11-08 Sperry Rand Corporation Bi-directional scanner assembly
US4257784A (en) * 1978-04-03 1981-03-24 Aktiebolaget Svenska Flaktfabriken Method and apparatus for cleaning used air from spray booths wherein articles are lacquered
US4542528A (en) * 1981-04-09 1985-09-17 Recognition Equipment Incorporated OCR and bar code reader with optimized sensor
US4721849A (en) * 1985-10-02 1988-01-26 Videx, Inc. Portable programmable optical code reader
US4758717A (en) * 1982-01-25 1988-07-19 Symbol Technologies, Inc. Narrow-bodied, single-and twin-windowed portable laser scanning head for reading bar code symbols
US4760248A (en) * 1985-02-28 1988-07-26 Symbol Technologies, Inc. Portable laser diode scanning head
US4774715A (en) * 1987-03-11 1988-09-27 Telesystems Slw Inc. Device for demodulating a spread spectrum signal
US4818847A (en) * 1982-07-29 1989-04-04 Nippondenso Co., Ltd. Apparatus for optically reading printed information
US4841132A (en) * 1986-07-21 1989-06-20 Matsushita Electric Industrial Co., Ltd. Program recording scheduling apparatus using an optical reader
US4866257A (en) * 1987-11-19 1989-09-12 Spectra-Physics, Inc. Bar code scanner and method
US4877949A (en) * 1986-08-08 1989-10-31 Norand Corporation Hand-held instant bar code reader system with automated focus based on distance measurements
US4920255A (en) * 1988-10-31 1990-04-24 Stephen C. Gabeler Automatic incremental focusing scanner system
US4945216A (en) * 1985-11-06 1990-07-31 Sharp Kabushiki Kaisha Wireless bar code reader
US4964167A (en) * 1987-07-15 1990-10-16 Matsushita Electric Works, Ltd. Apparatus for generating synthesized voice from text
US5010241A (en) * 1989-01-12 1991-04-23 Hewlett-Packard Company Sensor array and illumination system for a large depth-of-field bar code scanner
US5019699A (en) * 1988-08-31 1991-05-28 Norand Corporation Hand-held optical character reader with means for instantaneously reading information from a predetermined area at an optical sensing area
US5034619A (en) * 1989-09-21 1991-07-23 Welch Allyn, Inc. Optical reader with dual vertically oriented photoemitters
US5046066A (en) * 1987-02-09 1991-09-03 Telesystems Slw Inc. Wireless local area network
US5059778A (en) * 1986-09-29 1991-10-22 Mars Incorporated Portable data scanner apparatus
US5059779A (en) * 1989-06-16 1991-10-22 Symbol Technologies, Inc. Scan pattern generators for bar code symbol readers
US5101406A (en) * 1989-08-24 1992-03-31 Telesystems Slw Inc. Wireless communications system
US5149948A (en) * 1990-07-16 1992-09-22 Computer Identics Improved bar code reader system for reading bar codes under high specular reflection conditions with a variety of surface effects
US5157248A (en) * 1988-11-01 1992-10-20 Symbol Technologies, Inc. Laser diode scanner with minimized power consumption, minimized dead zone, and increased safety
US5177346A (en) * 1989-12-13 1993-01-05 Computer Identics Bar code reader system for reading bar code labels with a highly specular and low contrast surface
US5206881A (en) * 1992-04-15 1993-04-27 Telesystems Slw Inc. Wireless local area network
US5208449A (en) * 1991-09-09 1993-05-04 Psc, Inc. Portable transaction terminal
US5233171A (en) * 1990-09-13 1993-08-03 Minnesota Mining And Manufacturing Company Optical reader with power isolation
US5235167A (en) * 1988-10-21 1993-08-10 Symbol Technologies, Inc. Laser scanning system and scanning method for reading bar codes
US5280164A (en) * 1988-11-01 1994-01-18 Symbol Technologies, Inc. Laser diode scanner with minimized dead zone
US5296689A (en) * 1992-02-28 1994-03-22 Spectra-Physics Scanning Systems, Inc. Aiming beam system for optical data reading device
US5317136A (en) * 1990-12-20 1994-05-31 Nippodenso Co., Ltd. Information reading device which controls communication interrupt signal from a host system
US5319182A (en) * 1992-03-04 1994-06-07 Welch Allyn, Inc. Integrated solid state light emitting and detecting array and apparatus employing said array
US5331176A (en) * 1992-04-10 1994-07-19 Veritec Inc. Hand held two dimensional symbol reader with a symbol illumination window
US5340972A (en) * 1991-05-13 1994-08-23 Symbol Technologies, Inc. Hands-free bar code scanner with finger activated optical control
US5347114A (en) * 1991-10-25 1994-09-13 Olympus Optical Co., Ltd. Bar code symbol reading apparatus
US5347113A (en) * 1991-11-04 1994-09-13 Spectra-Physics Scanning Systems, Inc. Multiple-interface selection system for computer peripherals
US5354977A (en) * 1992-02-27 1994-10-11 Alex Roustaei Optical scanning head
US5378883A (en) * 1991-07-19 1995-01-03 Omniplanar Inc. Omnidirectional wide range hand held bar code reader
US5389917A (en) * 1993-02-17 1995-02-14 Psc, Inc. Lapel data entry terminal
US5396054A (en) * 1989-03-01 1995-03-07 Symbol Technologies, Inc. Bar code reader using scanned memory array
US5404002A (en) * 1993-05-17 1995-04-04 At&T Global Information Solutions Company Backup method for multiple source optical scanner
US5406063A (en) * 1993-05-07 1995-04-11 Telxon Corporation Hand-held data scanner having adjustable keyboard panel
US5410141A (en) * 1989-06-07 1995-04-25 Norand Hand-held data capture system with interchangable modules
US5420411A (en) * 1991-06-14 1995-05-30 Symbol Technologies, Inc. Combined range laser scanner
US5440111A (en) * 1991-02-07 1995-08-08 Psc, Inc. Optical system for scanning and reading barcodes with manually controlled scan beam length
US5504317A (en) * 1994-01-05 1996-04-02 Opticon, Inc. Optical reader
US5541419A (en) * 1994-03-21 1996-07-30 Intermec Corporation Symbology reader wth reduced specular reflection
US5597997A (en) * 1992-12-18 1997-01-28 Nippondenso Co., Ltd. Optical information reader
US5602376A (en) * 1993-05-07 1997-02-11 Psc Inc. Hand-mounted optical scanner system
US5623137A (en) * 1993-08-20 1997-04-22 Welch Allyn, Inc. Illumination apparatus for optical readers
US5637854A (en) * 1995-09-22 1997-06-10 Microscan Systems Incorporated Optical bar code scanner having object detection
US5696607A (en) * 1994-10-07 1997-12-09 Sharp Kabushiki Kaisha Image reader having a light-guiding transparent board
US5717195A (en) * 1996-03-05 1998-02-10 Metanetics Corporation Imaging based slot dataform reader
US5723868A (en) * 1995-05-15 1998-03-03 Welch Allyn, Inc. Illuminating assembly for use with bar code readers
US5739518A (en) * 1995-05-17 1998-04-14 Metanetics Corporation Autodiscrimination for dataform decoding and standardized recording
US5763864A (en) * 1994-07-26 1998-06-09 Meta Holding Corporation Dataform reader including dual laser and imaging reading assemblies
US5777743A (en) * 1994-06-17 1998-07-07 Kensington Laboratories, Inc. Scribe mark reader
US5784102A (en) * 1995-05-15 1998-07-21 Welch Allyn, Inc. Optical reader having improved interactive image sensing and control circuitry
US5814827A (en) * 1995-05-19 1998-09-29 Symbol Technologies, Inc. Optical scanner with extended depth of focus
US5831254A (en) * 1995-12-18 1998-11-03 Welch Allyn, Inc. Exposure control apparatus for use with optical readers
US5859417A (en) * 1991-06-14 1999-01-12 Symbol Technologies, Inc. Optical scanners having dual surface optical elements for dual working ranges
US5872354A (en) * 1989-01-31 1999-02-16 Norand Corporation Hand-held data capture system with interchangable modules including autofocusing data file reader using the slope of the image signal to determine focus
US5914478A (en) * 1997-01-24 1999-06-22 Symbol Technologies, Inc. Scanning system and method of operation with intelligent automatic gain control
US5932139A (en) * 1994-03-17 1999-08-03 Hitachi Maxell, Ltd. Fluorescent substance, fluorescent composition, fluorescent mark carrier and optical reader thereof
US5942762A (en) * 1997-01-29 1999-08-24 Accu-Sort Systems, Inc. CCD scanner having improved specular reflection discrimination
US5942741A (en) * 1994-03-04 1999-08-24 Welch Allyn, Inc. Apparatus for optimizing throughput in decoded-output scanners and method of using same
US5949052A (en) * 1997-10-17 1999-09-07 Welch Allyn, Inc. Object sensor system for stationary position optical reader
US5955720A (en) * 1996-03-21 1999-09-21 Symbol Technologies, Inc. Semi-retroreflective scanners
US5965863A (en) * 1994-03-04 1999-10-12 Welch Allyn, Inc. Optical reader system comprising local host processor and optical reader
US5975419A (en) * 1994-08-17 1999-11-02 Metrologic Instruments, Inc. Holographic laser scanner generating a high-resolution 2-D raster scanning pattern using a holographic scanning disc
US5992744A (en) * 1997-02-18 1999-11-30 Welch Allyn, Inc. Optical reader having multiple scanning assemblies with simultaneously decoded outputs
US6015088A (en) * 1996-11-05 2000-01-18 Welch Allyn, Inc. Decoding of real time video imaging
US6155491A (en) * 1998-05-29 2000-12-05 Welch Allyn Data Collection, Inc. Lottery game ticket processing apparatus
US6223988B1 (en) * 1996-10-16 2001-05-01 Omniplanar, Inc Hand-held bar code reader with laser scanning and 2D image capture
US6298176B2 (en) * 1997-10-17 2001-10-02 Welch Allyn Data Collection, Inc. Symbol-controlled image data reading system
US6352204B2 (en) * 1999-08-04 2002-03-05 Industrial Data Entry Automation Systems Incorporated Optical symbol scanner with low angle illumination
US6360949B1 (en) * 1995-10-10 2002-03-26 Symbol Technologies, Inc. Retro-reflective scan module for electro-optical readers
US6398112B1 (en) * 1994-06-30 2002-06-04 Symbol Technologies, Inc. Apparatus and method for reading indicia using charge coupled device and scanning laser beam technology
US6547139B1 (en) * 1998-07-10 2003-04-15 Welch Allyn Data Collection, Inc. Method and apparatus for extending operating range of bar code scanner
US6561428B2 (en) * 1997-10-17 2003-05-13 Hand Held Products, Inc. Imaging device having indicia-controlled image parsing mode
US6578767B1 (en) * 1999-07-16 2003-06-17 Symbol Technologies, Inc. Low cost bar code reader
US6585159B1 (en) * 1999-11-02 2003-07-01 Welch Allyn Data Collection, Inc. Indicia sensor system for optical reader
US6595422B1 (en) * 1999-06-23 2003-07-22 Assure Systems, Inc. Bar code reader
US6637658B2 (en) * 2001-01-22 2003-10-28 Welch Allyn, Inc. Optical reader having partial frame operating mode
US6655595B1 (en) * 1998-11-05 2003-12-02 Welch Allyn, Inc. Bar code reader configured to read fine print bar code symbols
US6722569B2 (en) * 2001-07-13 2004-04-20 Welch Allyn Data Collection, Inc. Optical reader having a color imager
US6832725B2 (en) * 1999-10-04 2004-12-21 Hand Held Products, Inc. Optical reader comprising multiple color illumination
US6834807B2 (en) * 2001-07-13 2004-12-28 Hand Held Products, Inc. Optical reader having a color imager

Family Cites Families (217)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1233038B (en) 1962-04-27 1967-01-26 Siemens Ag Electrical device, in which are the electrical connections between its components produced by circuit boards
US3262023A (en) 1964-03-19 1966-07-19 Int Resistance Co Electrical circuit assembly having wafers mounted in stacked relation
US3808447A (en) * 1971-05-28 1974-04-30 Wilkata Codes Inc Photoelectric scanning device using diffuse and specular reflection
USRE29194E (en) * 1971-12-14 1977-04-26 Bausch & Lomb Incorporated Method and apparatus for transferring data
JPS5855567B2 (en) * 1975-06-06 1983-12-10 Hitachi Ltd
GB2128549B (en) 1982-10-13 1986-02-12 Standard Telephones Cables Ltd Debit/credit card
US5668364A (en) * 1985-02-28 1997-09-16 Symbol Technologies, Inc. Target finder in electro-optical scanners
JPH07107688B2 (en) * 1986-03-18 1995-11-15 日本電装株式会社 Optical information reading apparatus
US5640001A (en) 1986-08-08 1997-06-17 Norand Technology Corporation Hand-held instant bar code reader having automatic focus control for operation over a range of distances
US5841121A (en) 1988-08-31 1998-11-24 Norand Technology Corporation Hand-held optically readable character set reader having automatic focus control for operation over a range of distances
US5576529A (en) 1986-08-08 1996-11-19 Norand Technology Corporation Hand-held optically readable information set reader focus with operation over a range of distances
US5227614A (en) 1986-08-15 1993-07-13 Norand Corporation Core computer processor module, and peripheral shell module assembled to form a pocket size data capture unit
US5949056A (en) 1986-09-10 1999-09-07 Norand Corporation Method and apparatus for optically reading an information pattern
US4882476A (en) * 1986-09-10 1989-11-21 Norand Corporation Bar code reader with enhanced sensitivity
DE3788734D1 (en) 1986-10-24 1994-02-17 Sumitomo Electric Industries An apparatus for scanning an optical code.
KR920002926B1 (en) * 1988-01-08 1992-04-10 고바야시 쥰 Optical image reading apparatus
US6681994B1 (en) * 1988-08-31 2004-01-27 Intermec Ip Corp. Method and apparatus for optically reading information
US5479002A (en) * 1988-05-11 1995-12-26 Symbol Technologies, Inc. Bar code scanner with scanning beam and/or field of view adjustable about three mutually orthogonal axes
US6688523B1 (en) * 1988-08-31 2004-02-10 Intermec Ip Corp. System for reading optical indicia
US5504316A (en) * 1990-05-08 1996-04-02 Symbol Technologies, Inc. Laser scanning system and scanning method for reading 1-D and 2-D barcode symbols
US6330973B1 (en) * 1989-10-30 2001-12-18 Symbol Technologies, Inc. Integrated code reading systems including tunnel scanners
US5280161A (en) * 1988-11-18 1994-01-18 West Electric Company, Ltd. Apparatus for optically reading a bar code
US6389010B1 (en) 1995-10-05 2002-05-14 Intermec Ip Corp. Hierarchical data collection network supporting packetized voice communications among wireless terminals and telephones
US5780034A (en) 1989-03-14 1998-07-14 Yeda Research And Development Co. Ltd. Diagnosis and treatment of insulin dependent diabetes mellitus using heat shock protein determinents
US5254977A (en) 1989-06-12 1993-10-19 Crosfield Electronics Ltd. Color display
US5668803A (en) 1989-06-29 1997-09-16 Symbol Technologies, Inc. Protocol for packet data communication system
US5815811A (en) 1989-06-29 1998-09-29 Symbol Technologies, Inc. Preemptive roaming in a cellular local area wireless network
US5367151A (en) 1989-10-30 1994-11-22 Symbol Technologies, Inc. Slim scan module with interchangeable scan element
US5552592A (en) 1989-10-30 1996-09-03 Symbol Technologies, Inc. Slim scan module with dual detectors
DE69028185D1 (en) * 1989-12-15 1996-09-26 Toshiba Kawasaki Kk System for recording an image with an image of the face and with identification information
US5837986A (en) 1990-01-05 1998-11-17 Symbol Technologies, Inc. Modification of software files in a microprocessor-controlled device via two-dimensional bar code symbols
JPH03228193A (en) 1990-02-01 1991-10-09 Nec Corp Bar code reader
US5646389A (en) 1990-11-13 1997-07-08 Symbol Technologies, Inc. Inventory management system using coded re-order information
US5905251A (en) 1993-11-24 1999-05-18 Metrologic Instruments, Inc. Hand-held portable WWW access terminal with visual display panel and GUI-based WWW browser program integrated with bar code symbol reader in a hand-supportable housing
US6027024A (en) * 1994-08-17 2000-02-22 Metrologic Instruments, Inc. Hand-held portable WWW access terminal with visual display panel and GUI-based WWW browser program integrated with bar code symbol reader
US6085978A (en) 1994-08-17 2000-07-11 Metrologic Instruments, Inc. Holographic laser scanners of modular construction and method and apparatus for designing and manufacturing the same
US6732929B2 (en) 1990-09-10 2004-05-11 Metrologic Instruments, Inc. Led-based planar light illumination beam generation module employing a focal lens for reducing the image size of the light emmiting surface of the led prior to beam collimation and planarization
US6942150B2 (en) 1993-11-24 2005-09-13 Metrologic Instruments, Inc. Web-based mobile information access terminal
US6076733A (en) * 1993-11-24 2000-06-20 Metrologic Instruments, Inc. Web-based system and method for enabling a viewer to access and display HTML-encoded documents located on the world wide web (WWW) by reading URL-encoded bar code symbols printed on a web-based information resource guide
US6412699B1 (en) 1990-09-11 2002-07-02 Metrologic Instruments, Inc. Method of and system for producing transaction-enabling graphical user interfaces at internet-enabled terminals in response to reading bar code symbols pointing to html-encoded documents embedded with java-applets and stored on http information servers
US6068188A (en) 1993-11-24 2000-05-30 Metrologic Instruments, Inc. System and method for composing menus of URL-encoded bar code symbols while using internet browser program
JP2790206B2 (en) 1990-09-14 1998-08-27 富士写真フイルム株式会社 Film image input device
US5340971A (en) 1990-09-17 1994-08-23 Metrologic Instruments, Inc. Automatic bar code reading system having selectable long range and short range modes of operation
US5777315A (en) 1991-09-17 1998-07-07 Metrologic Instruments, Inc. Method and apparatus for programming system function parameters in programmable code symbol readers
US5880452A (en) * 1990-11-15 1999-03-09 Geo Labs, Inc. Laser based PCMCIA data collection system with automatic triggering for portable applications and method of use
DE4108916C2 (en) 1991-03-19 1994-11-17 Data Logic Optik Elektronik Bar code system
JPH04333187A (en) 1991-05-08 1992-11-20 Brother Ind Ltd Bar code reader
US5491328A (en) * 1991-09-24 1996-02-13 Spectra-Physics Scanning Systems, Inc. Checkout counter scanner having multiple scanning surfaces
US5371347A (en) 1991-10-15 1994-12-06 Gap Technologies, Incorporated Electro-optical scanning system with gyrating scan head
DE69232291D1 (en) 1991-10-29 2002-01-24 Denso Corp Information reading device
US5308962A (en) 1991-11-01 1994-05-03 Welch Allyn, Inc. Reduced power scanner for reading indicia
US5286960A (en) * 1991-11-04 1994-02-15 Welch Allyn, Inc. Method of programmable digitization and bar code scanning apparatus employing same
US5610595A (en) * 1991-12-09 1997-03-11 Intermec Corporation Packet radio communication system protocol
EP1028381A3 (en) 1991-12-10 2001-08-08 Khyber Technologies Corporation Portable messaging and scheduling device with homebase station
EP0587115B1 (en) 1992-09-07 1999-02-10 Denso Corporation Communication system
US5294783A (en) * 1992-01-10 1994-03-15 Welch Allyn, Inc. Analog reconstruction circuit and bar code reading apparatus employing same
US5291008A (en) * 1992-01-10 1994-03-01 Welch Allyn, Inc. Optical assembly and apparatus employing same using an aspherical lens and an aperture stop
JPH06506788A (en) 1992-01-17 1994-07-28
US5659778A (en) 1992-02-03 1997-08-19 Tm Patents, L.P. System and method of mapping an array to processing elements
US5224614A (en) 1992-02-07 1993-07-06 The Procter & Gamble Company Non-handled lightweight plastic bottle with a substantially rigid grip design to facilitate pouring without loss of control
US5756981A (en) 1992-02-27 1998-05-26 Symbol Technologies, Inc. Optical scanner for reading and decoding one- and-two-dimensional symbologies at variable depths of field including memory efficient high speed image processing means and high accuracy image analysis means
US6092728A (en) 1992-03-30 2000-07-25 Symbol Technologies, Inc. Miniature laser diode focusing module using micro-optics
US5579487A (en) 1992-10-02 1996-11-26 Teletransaction, Inc. Portable work slate computer with multiple docking positions for interchangeably receiving removable modules
US6049813A (en) * 1993-02-26 2000-04-11 Intermec Ip Corp. Portable work station-type data collection system
US5510606A (en) * 1993-03-16 1996-04-23 Worthington; Hall V. Data collection system including a portable data collection terminal with voice prompts
WO1994027246A1 (en) 1993-05-10 1994-11-24 Psc, Inc. Bar code decoding system
US5591955A (en) * 1993-05-11 1997-01-07 Laser; Vadim Portable data file readers
JPH06333074A (en) 1993-05-25 1994-12-02 Nippondenso Co Ltd Optical information reader
US5697699A (en) 1993-09-09 1997-12-16 Asahi Kogaku Kogyo Kabushiki Kaisha Lighting apparatus
US5335041A (en) * 1993-09-13 1994-08-02 Eastman Kodak Company Exposure and focus system for a zoom camera
JP2740727B2 (en) 1993-09-27 1998-04-15 株式会社テック Symbol reader
JPH07203400A (en) 1993-10-15 1995-08-04 Matsushita Electric Ind Co Ltd Multimedia rendering marker and its usage
US6321992B1 (en) 1997-03-19 2001-11-27 Metrologic Instruments, Inc. Internet-based system and method for tracking objects bearing URL-encoded bar code symbols
US5929418A (en) 1994-03-04 1999-07-27 Welch Allyn, Inc. Optical reader having improved menuing features
US5825006A (en) 1994-03-04 1998-10-20 Welch Allyn, Inc. Optical reader having improved autodiscrimination features
US5932862A (en) 1994-03-04 1999-08-03 Welch Allyn, Inc. Optical reader having improved scanning-decoding features
US5598007A (en) * 1994-03-21 1997-01-28 Intermec Corporation Symbology reader with fixed focus spotter beam
US5504367A (en) * 1994-03-21 1996-04-02 Intermec Corporation Symbology reader illumination system
US5550364A (en) 1994-03-21 1996-08-27 Intermec Corporation Method and apparatus for spotter beam formation using a partitioned optical element
DE4411536A1 (en) 1994-04-02 1995-10-05 Cassella Ag Water-swellable hydrophilic polymers
CA2150747A1 (en) * 1994-06-30 1995-12-31 Yajun Li Multiple laser indicia reader optionally utilizing a charge coupled device (ccd) detector and operating method therefor
US5703349A (en) 1995-06-26 1997-12-30 Metanetics Corporation Portable data collection device with two dimensional imaging assembly
US6019286A (en) * 1995-06-26 2000-02-01 Metanetics Corporation Portable data collection device with dataform decoding and image capture capability
US5783811A (en) 1995-06-26 1998-07-21 Metanetics Corporation Portable data collection device with LED targeting and illumination assembly
JP3031202B2 (en) 1994-08-08 2000-04-10 株式会社デンソー Mobile radio station
US5834749A (en) 1994-08-30 1998-11-10 Durbin; Dennis A. Optical image capture system for reading targets at oblique angles
US5534684A (en) 1994-08-30 1996-07-09 Norand Corporation Portable optical reader with motion sensing system and method
US5648650A (en) * 1994-09-07 1997-07-15 Alps Electric Co., Ltd. Optical bar code reading apparatus with regular reflection detecting circuit
EP0788634B1 (en) 1994-10-25 2000-03-08 United Parcel Service Of America, Inc. Automatic electronic camera for label image capture
JP2899113B2 (en) 1994-10-25 1999-06-02 ユナイテッド パーセル サービス オブ アメリカ,インコーポレイテッド Method and apparatus for a portable non-contact label imager
US6385352B1 (en) 1994-10-26 2002-05-07 Symbol Technologies, Inc. System and method for reading and comparing two-dimensional images
US6347163B2 (en) * 1994-10-26 2002-02-12 Symbol Technologies, Inc. System for reading two-dimensional images using ambient and/or projected light
US5644601A (en) 1994-10-31 1997-07-01 Symbol Technologies, Inc. Method and apparatus for bias suppression in a VCO based FM transmission system
US5786586A (en) 1995-01-17 1998-07-28 Welch Allyn, Inc. Hand-held optical reader having a detachable lens-guide assembly
US6045047A (en) * 1995-01-17 2000-04-04 Welch Allyn Data Collection, Inc. Two-dimensional part reader having a focussing guide
US5612530A (en) * 1995-01-24 1997-03-18 Symbol Technologies, Inc. Scanner with pre-programmed working ranges
JP3659675B2 (en) 1995-01-31 2005-06-15 オリンパス株式会社 Information reproducing apparatus
US5600121A (en) 1995-03-20 1997-02-04 Symbol Technologies, Inc. Optical reader with independent triggering and graphical user interface
US5585616A (en) 1995-05-05 1996-12-17 Rockwell International Corporation Camera for capturing and decoding machine-readable matrix symbol images applied to reflective surfaces
US6060722A (en) 1995-05-15 2000-05-09 Havens; William H. Optical reader having illumination assembly including improved aiming pattern generator
JP3086151B2 (en) 1995-05-18 2000-09-11 シャープ株式会社 Two-dimensional bar code processing function information processing apparatus
US6029893A (en) * 1995-05-22 2000-02-29 Symbol Technologies, Inc. Optical scanner having a reflected light collector including holographic optical elements
JP3187287B2 (en) * 1995-06-21 2001-07-11 旭光学工業株式会社 Data symbol reader
US5811784A (en) 1995-06-26 1998-09-22 Telxon Corporation Extended working range dataform reader
US5714745A (en) * 1995-12-20 1998-02-03 Metanetics Corporation Portable data collection device with color imaging assembly
US5780831A (en) 1995-07-12 1998-07-14 Asahi Kogaku Kogyo Kabushiki Kaisha One-dimensional and two-dimensional data symbol reader
US6811086B1 (en) * 1995-07-20 2004-11-02 Fujitsu Limited Stand for pivotably mounting an optical reading device
JPH0991368A (en) 1995-07-20 1997-04-04 Fujitsu Ltd Optical reader
US5691773A (en) * 1995-09-12 1997-11-25 Metanetics Corporation Anti-hand-jittering dataform readers and methods
US5744815A (en) * 1995-10-05 1998-04-28 Symbol Technologies, Inc. Beam splitting optics in bar code readers
US5745176A (en) * 1995-10-12 1998-04-28 Ppt Vision, Inc. Machine-vision illumination system and method for delineating a lighted volume from an unlighted volume
US5949054A (en) 1995-10-23 1999-09-07 Welch Allyn, Inc. Bar code reader for reading high to low contrast bar code symbols
JP3441580B2 (en) 1995-12-14 2003-09-02 富士通フロンテック株式会社 Reading device
US7028899B2 (en) 1999-06-07 2006-04-18 Metrologic Instruments, Inc. Method of speckle-noise pattern reduction and apparatus therefore based on reducing the temporal-coherence of the planar laser illumination beam before it illuminates the target object by applying temporal phase modulation techniques during the transmission of the plib towards the target
US5743633A (en) * 1995-12-27 1998-04-28 Physical Optics Corporation Bar code illuminator
US5850078A (en) 1996-01-16 1998-12-15 Symbol Technologies, Inc. Simplified assembly and automatic testing of components in electro-optical systems for reading coded indicia
US6575368B1 (en) 1996-01-31 2003-06-10 Psc Scanning, Inc. Multiple aperture data reader for multi-mode operation
US5804802A (en) 1996-02-14 1998-09-08 United Parcel Service Of America, Inc. Two-way data communication manager
US5838720A (en) 1996-02-23 1998-11-17 Teletransactions, Inc. Transceiver control with sleep mode operation
US6034379A (en) * 1996-03-01 2000-03-07 Intermec Ip Corp. Code reader having replaceable optics assemblies supporting multiple illuminators
US5736726A (en) * 1996-03-29 1998-04-07 Telxon Corporation Portable data collection device having removable handle and battery
US5773810A (en) * 1996-03-29 1998-06-30 Welch Allyn, Inc. Method for generating real time degree of focus signal for handheld imaging device
US5793033A (en) 1996-03-29 1998-08-11 Metanetics Corporation Portable data collection device with viewing assembly
US6179208B1 (en) * 1997-01-31 2001-01-30 Metanetics Corporation Portable data collection device with variable focusing module for optic assembly
CN1311679C (en) 1996-05-31 2007-04-18 松下电器产业株式会社 Data transmitter and receiver and method thereof
US5794145A (en) 1996-06-07 1998-08-11 Telxon Corporation Mobile device multiband antenna system
US5988506A (en) 1996-07-16 1999-11-23 Galore Scantec Ltd. System and method for reading and decoding two dimensional codes of high density
US5962836A (en) 1996-07-29 1999-10-05 Asahi Kogaku Kogyo Kabushiki Kaisha Optical reader having placement detecting mechanism
US6507864B1 (en) * 1996-08-02 2003-01-14 Symbol Technologies, Inc. Client-server software for controlling data collection device from host computer
US5848064A (en) 1996-08-07 1998-12-08 Telxon Corporation Wireless software upgrades with version control
US5859970A (en) * 1996-08-27 1999-01-12 Telxon Corporation Portable computer with internal ethernet/token ring controller
JPH1069516A (en) * 1996-08-28 1998-03-10 Asahi Optical Co Ltd Data symbol reader
US5825002A (en) 1996-09-05 1998-10-20 Symbol Technologies, Inc. Device and method for secure data updates in a self-checkout system
US6084528A (en) 1996-09-05 2000-07-04 Symbol Technologies, Inc. Intranet scanning terminal system
US5979757A (en) 1996-09-05 1999-11-09 Symbol Technologies, Inc. Method and system for presenting item information using a portable data terminal
US5945660A (en) 1996-10-16 1999-08-31 Matsushita Electric Industrial Co., Ltd. Communication system for wireless bar code reader
US5924040A (en) 1996-11-20 1999-07-13 Telxon Corporation Wireless communication system having base station with adjustable power transceiver for locating mobile devices
US6119944A (en) 1997-02-03 2000-09-19 Symbol Technologies, Inc. Down-loadable hand-held optical reader
US6747692B2 (en) 1997-03-28 2004-06-08 Symbol Technologies, Inc. Portable multipurpose recording terminal and portable network server
US5946344A (en) 1997-04-07 1999-08-31 Intermec Ip Corp. Multiple-rate direct sequence architecture utilizing a fixed chipping rate and variable spreading code lengths
DE69838714D1 (en) 1997-05-05 2007-12-27 Symbol Technologies Inc Optical scanning device and image reader for image reading and decoding optical information with a two-dimensional symbols and at varying depth field
US5920061A (en) 1997-05-29 1999-07-06 Metanetics Corporation Portable data collection device including imaging assembly with modular high density dataform reader assembly
JP3435311B2 (en) * 1997-06-19 2003-08-11 松下電器産業株式会社 Information reading device
US6062475A (en) 1997-06-25 2000-05-16 Metanetics Corporation Portable data collection device including color imaging dataform reader assembly
US5912921A (en) 1997-08-20 1999-06-15 Intermec Ip Corp. Concurrent multiple data rate communications in a wireless local area network
JP3280892B2 (en) * 1997-09-30 2002-05-13 富士通株式会社 Optical scanning device
US6053408A (en) 1997-12-02 2000-04-25 Telxon Corporation Multi-focal length imaging based portable dataform reader
US6318635B1 (en) 1997-12-02 2001-11-20 Telxon Corporation Multi-focal length imaging based portable dataform reader
EP0926582B1 (en) * 1997-12-24 2000-09-27 Datalogic S.P.A. Apparatus and process for focusing a laser beam for optical codes
US6535493B1 (en) * 1998-01-15 2003-03-18 Symbol Technologies, Inc. Mobile internet communication protocol
US6178426B1 (en) * 1998-01-15 2001-01-23 Symbol Technologies, Inc. Apparatus with extended markup language data capture capability
US6123263A (en) * 1998-01-29 2000-09-26 Meta Holdings Corporation Hand held dataform reader having strobing ultraviolet light illumination assembly for reading fluorescent dataforms
US6003008A (en) 1998-03-20 1999-12-14 Skyteller L.L.C. Point of sale device
US6062477A (en) 1998-04-30 2000-05-16 Ncr Corporation Apparatus and method of operating a retail terminal having a single-orientation base assembly and a multiple-orientation base assembly
WO1999057649A3 (en) * 1998-05-04 2000-03-09 Intermec Ip Corp Automatic data collection device having a network communications capability
US6199044B1 (en) * 1998-05-27 2001-03-06 Intermec Ip Corp. Universal data input and processing device, such as universal point-of-sale device for inputting and processing bar code symbols, document images, and other data
ES2162409T3 (en) 1998-06-01 2001-12-16 Datalogic Spa Apparatus and method for reading an optical code.
US6352517B1 (en) * 1998-06-02 2002-03-05 Stephen Thomas Flock Optical monitor of anatomical movement and uses thereof
US6340114B1 (en) * 1998-06-12 2002-01-22 Symbol Technologies, Inc. Imaging engine and method for code readers
WO1999067701A1 (en) 1998-06-19 1999-12-29 4P S.R.L. Multifunctional electronic palmtop computer
US6119939A (en) 1998-07-08 2000-09-19 Welch Allyn, Inc. Optical assembly for barcode scanner
US6607128B1 (en) 1998-07-08 2003-08-19 Welch Allyn Data Collection Inc. Optical assembly for barcode scanner
US6164544A (en) 1998-07-08 2000-12-26 Welch Allyn Data Collection, Inc. Adjustable illumination system for a barcode scanner
US6561429B2 (en) * 1998-07-21 2003-05-13 Eastman Kodak Company Adjustable reader arrangement and method of reading encoded indicia formed on an object
US6191406B1 (en) 1998-07-24 2001-02-20 Eastman Kodak Company Data reader and reader system having visible centerless targeting
US6152371A (en) 1998-08-12 2000-11-28 Welch Allyn, Inc. Method and apparatus for decoding bar code symbols
US6036096A (en) * 1998-09-11 2000-03-14 Robotic Vision Systems, Inc. Multi-modally grippable device and method of use
US6098887A (en) 1998-09-11 2000-08-08 Robotic Vision Systems, Inc. Optical focusing device and method
US6661521B1 (en) 1998-09-11 2003-12-09 Robotic Vision Systems, Inc. Diffuse surface illumination apparatus and methods
US6066857A (en) 1998-09-11 2000-05-23 Robotic Vision Systems, Inc. Variable focus optical system
US6283374B1 (en) 1998-09-11 2001-09-04 Robotic Vision Systems, Inc. Symbology imaging and reading apparatus and method
US6843417B1 (en) * 1998-09-11 2005-01-18 L. V. Partners, L.P. Aiming indicia for a bar code and method of use
DE69834918T2 (en) 1998-11-02 2007-02-01 Datalogic S.P.A., Lippo Di Calderara Di Reno Arrangement for the automatic acquisition and processing of optical code
US6247645B1 (en) 1999-01-25 2001-06-19 International Business Machines Corporation Optical reader with combined housing and light pipe
US6539360B1 (en) * 1999-02-05 2003-03-25 United Parcel Service Of America, Inc. Special handling processing in a package transportation system
JP3662769B2 (en) * 1999-05-12 2005-06-22 株式会社東研 Color image corresponding code reader and methods
US6629641B2 (en) 2000-06-07 2003-10-07 Metrologic Instruments, Inc. Method of and system for producing images of objects using planar laser illumination beams and image detection arrays
US6631842B1 (en) * 2000-06-07 2003-10-14 Metrologic Instruments, Inc. Method of and system for producing images of objects using planar laser illumination beams and image detection arrays
US6313917B1 (en) 1999-07-02 2001-11-06 Ncr Corporation Produce data collector and produce recognition system
JP2001068182A (en) 1999-08-27 2001-03-16 Sony Computer Entertainment Inc Board connecting structure, electronic equipment, and connector
US6375075B1 (en) * 1999-10-18 2002-04-23 Intermec Ip Corp. Method and apparatus for reading machine-readable symbols including color symbol elements
EP1396811B8 (en) 2000-02-23 2008-07-16 Datalogic S.P.A. Apparatus and method for reading and decoding optical codes with result indication
US6676016B1 (en) * 2000-05-04 2004-01-13 Ncr Corporation Retail terminal configured as consumer gateway to electronic billing application
US20020039099A1 (en) 2000-09-30 2002-04-04 Hand Held Products, Inc. Method and apparatus for simultaneous image capture and image display in an imaging device
JP2002150215A (en) 2000-11-13 2002-05-24 Canon Inc Information reader
US6749120B2 (en) * 2000-12-11 2004-06-15 Cpo Technologies Corp. Method and apparatus for scanning electronic barcodes
US6601768B2 (en) 2001-03-08 2003-08-05 Welch Allyn Data Collection, Inc. Imaging module for optical reader comprising refractive diffuser
US6631845B2 (en) * 2001-04-03 2003-10-14 Symbol Technologies, Inc. Two window optical scanner
US7331523B2 (en) * 2001-07-13 2008-02-19 Hand Held Products, Inc. Adaptive optical image reader
US20030018897A1 (en) * 2001-07-20 2003-01-23 Psc Scanning, Inc. Video identification verification system and method for a self-checkout system
US6889904B2 (en) * 2002-03-20 2005-05-10 Symbol Technologies, Inc. Image capture system and method using a common imaging array
US6824059B2 (en) 2002-04-30 2004-11-30 Hewlett-Packard Development Company, L.P. Apparatus for capturing images and barcodes
US20030222147A1 (en) * 2002-06-04 2003-12-04 Hand Held Products, Inc. Optical reader having a plurality of imaging modules
US7219843B2 (en) * 2002-06-04 2007-05-22 Hand Held Products, Inc. Optical reader having a plurality of imaging modules
US20030222144A1 (en) * 2002-06-04 2003-12-04 Hand Held Products, Inc. Manufacturing methods for a decoder board for an optical reader utilizing a plurality of imaging formats
US7055747B2 (en) 2002-06-11 2006-06-06 Hand Held Products, Inc. Long range optical reader
US7090132B2 (en) * 2002-06-11 2006-08-15 Hand Held Products, Inc. Long range optical reader
US6909080B2 (en) * 2002-12-17 2005-06-21 Symbol Technologies, Inc. Arrangement for and method of imaging targets at plural focal planes
US7195164B2 (en) 2003-01-03 2007-03-27 Symbol Technologies, Inc. Optical code reading device having more than one imaging engine
US7086596B2 (en) 2003-01-09 2006-08-08 Hand Held Products, Inc. Decoder board for an optical reader utilizing a plurality of imaging formats
EP1632729A4 (en) 2003-06-03 2009-11-11 Toshiba Carrier Corp Air-conditioner
US7428997B2 (en) * 2003-07-29 2008-09-30 Microvision, Inc. Method and apparatus for illuminating a field-of-view and capturing an image
US20060027659A1 (en) * 2003-08-01 2006-02-09 Symbol Technologies, Inc. Integrated exit window and imaging engine
US7021542B2 (en) * 2003-08-01 2006-04-04 Symbol Technologies, Inc. Imaging and illumination engine for an optical code reader
US7044377B2 (en) * 2003-08-01 2006-05-16 Symbol Technologies Inc. Plug-and-play imaging and illumination engine for an optical code reader
US7014114B2 (en) * 2003-10-02 2006-03-21 Symbol Technologies, Inc. Image capture device for and method of electro-optically reading indicia at low ambient light levels
US7201321B2 (en) * 2004-08-27 2007-04-10 Symbol Technologies, Inc. Electro-optically reading direct part markings on workpieces by image capture
US7281662B2 (en) * 2004-12-30 2007-10-16 Symbol Technologies, Inc. Methods and apparatus for information capture illumination
US7611060B2 (en) * 2005-03-11 2009-11-03 Hand Held Products, Inc. System and method to automatically focus an image reader
US7780089B2 (en) 2005-06-03 2010-08-24 Hand Held Products, Inc. Digital picture taking optical reader having hybrid monochrome and color image sensor array
US7770799B2 (en) 2005-06-03 2010-08-10 Hand Held Products, Inc. Optical reader having reduced specular reflection read failures
US7748629B2 (en) * 2006-01-31 2010-07-06 Symbol Technologies, Inc. Extended working range illumination system for an imaging-based bar code reader
US20070267501A1 (en) * 2006-05-18 2007-11-22 Hand Held Products, Inc. Multipurpose optical reader
US7857224B2 (en) * 2006-09-19 2010-12-28 Microscan Systems, Inc. Devices and/or systems for automatically imaging barcodes
US20080265035A1 (en) * 2007-04-25 2008-10-30 Symbol Technologies, Inc. Dual imaging lens system for bar code reader
US8794526B2 (en) * 2007-06-04 2014-08-05 Hand Held Products, Inc. Indicia reading terminal processing plurality of frames of image data responsively to trigger signal activation
US7866557B2 (en) * 2007-09-27 2011-01-11 Symbol Technologies, Inc. Imaging-based bar code reader utilizing modified rolling shutter operation

Patent Citations (100)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US29194A (en) * 1860-07-17 Improvement in hay-presses
US3978317A (en) * 1974-02-26 1976-08-31 Matsushita Electric Industrial Co., Ltd. Optical bar code reader
US4057784A (en) * 1976-09-27 1977-11-08 Sperry Rand Corporation Bi-directional scanner assembly
US4257784A (en) * 1978-04-03 1981-03-24 Aktiebolaget Svenska Flaktfabriken Method and apparatus for cleaning used air from spray booths wherein articles are lacquered
US4542528A (en) * 1981-04-09 1985-09-17 Recognition Equipment Incorporated OCR and bar code reader with optimized sensor
US4758717A (en) * 1982-01-25 1988-07-19 Symbol Technologies, Inc. Narrow-bodied, single-and twin-windowed portable laser scanning head for reading bar code symbols
US4818847A (en) * 1982-07-29 1989-04-04 Nippondenso Co., Ltd. Apparatus for optically reading printed information
US4760248A (en) * 1985-02-28 1988-07-26 Symbol Technologies, Inc. Portable laser diode scanning head
US5132525A (en) * 1985-02-28 1992-07-21 Jerome Swartz Portable laser diode scanning head with aiming beam
US4721849A (en) * 1985-10-02 1988-01-26 Videx, Inc. Portable programmable optical code reader
US4945216A (en) * 1985-11-06 1990-07-31 Sharp Kabushiki Kaisha Wireless bar code reader
US4841132A (en) * 1986-07-21 1989-06-20 Matsushita Electric Industrial Co., Ltd. Program recording scheduling apparatus using an optical reader
US4877949A (en) * 1986-08-08 1989-10-31 Norand Corporation Hand-held instant bar code reader system with automated focus based on distance measurements
US5059778A (en) * 1986-09-29 1991-10-22 Mars Incorporated Portable data scanner apparatus
US5046066A (en) * 1987-02-09 1991-09-03 Telesystems Slw Inc. Wireless local area network
US4774715A (en) * 1987-03-11 1988-09-27 Telesystems Slw Inc. Device for demodulating a spread spectrum signal
US4964167A (en) * 1987-07-15 1990-10-16 Matsushita Electric Works, Ltd. Apparatus for generating synthesized voice from text
US4866257A (en) * 1987-11-19 1989-09-12 Spectra-Physics, Inc. Bar code scanner and method
US4866257C1 (en) * 1987-11-19 2001-01-09 Spectra Physics Scanning Syst Bar code scanner and method
US5019699A (en) * 1988-08-31 1991-05-28 Norand Corporation Hand-held optical character reader with means for instantaneously reading information from a predetermined area at an optical sensing area
US5235167A (en) * 1988-10-21 1993-08-10 Symbol Technologies, Inc. Laser scanning system and scanning method for reading bar codes
US4920255A (en) * 1988-10-31 1990-04-24 Stephen C. Gabeler Automatic incremental focusing scanner system
US5280164A (en) * 1988-11-01 1994-01-18 Symbol Technologies, Inc. Laser diode scanner with minimized dead zone
US5157248A (en) * 1988-11-01 1992-10-20 Symbol Technologies, Inc. Laser diode scanner with minimized power consumption, minimized dead zone, and increased safety
US5010241A (en) * 1989-01-12 1991-04-23 Hewlett-Packard Company Sensor array and illumination system for a large depth-of-field bar code scanner
US5872354A (en) * 1989-01-31 1999-02-16 Norand Corporation Hand-held data capture system with interchangable modules including autofocusing data file reader using the slope of the image signal to determine focus
US5396054A (en) * 1989-03-01 1995-03-07 Symbol Technologies, Inc. Bar code reader using scanned memory array
US5410141A (en) * 1989-06-07 1995-04-25 Norand Hand-held data capture system with interchangable modules
US5059779A (en) * 1989-06-16 1991-10-22 Symbol Technologies, Inc. Scan pattern generators for bar code symbol readers
US5101406A (en) * 1989-08-24 1992-03-31 Telesystems Slw Inc. Wireless communications system
US5034619A (en) * 1989-09-21 1991-07-23 Welch Allyn, Inc. Optical reader with dual vertically oriented photoemitters
US5177346A (en) * 1989-12-13 1993-01-05 Computer Identics Bar code reader system for reading bar code labels with a highly specular and low contrast surface
US5149948A (en) * 1990-07-16 1992-09-22 Computer Identics Improved bar code reader system for reading bar codes under high specular reflection conditions with a variety of surface effects
US5233171A (en) * 1990-09-13 1993-08-03 Minnesota Mining And Manufacturing Company Optical reader with power isolation
US5317136A (en) * 1990-12-20 1994-05-31 Nippodenso Co., Ltd. Information reading device which controls communication interrupt signal from a host system
US5440111A (en) * 1991-02-07 1995-08-08 Psc, Inc. Optical system for scanning and reading barcodes with manually controlled scan beam length
US5340972A (en) * 1991-05-13 1994-08-23 Symbol Technologies, Inc. Hands-free bar code scanner with finger activated optical control
US5859417A (en) * 1991-06-14 1999-01-12 Symbol Technologies, Inc. Optical scanners having dual surface optical elements for dual working ranges
US5420411A (en) * 1991-06-14 1995-05-30 Symbol Technologies, Inc. Combined range laser scanner
US5378883A (en) * 1991-07-19 1995-01-03 Omniplanar Inc. Omnidirectional wide range hand held bar code reader
US5208449A (en) * 1991-09-09 1993-05-04 Psc, Inc. Portable transaction terminal
US5347114A (en) * 1991-10-25 1994-09-13 Olympus Optical Co., Ltd. Bar code symbol reading apparatus
US5347113A (en) * 1991-11-04 1994-09-13 Spectra-Physics Scanning Systems, Inc. Multiple-interface selection system for computer peripherals
US5354977A (en) * 1992-02-27 1994-10-11 Alex Roustaei Optical scanning head
US5296689A (en) * 1992-02-28 1994-03-22 Spectra-Physics Scanning Systems, Inc. Aiming beam system for optical data reading device
US5319182A (en) * 1992-03-04 1994-06-07 Welch Allyn, Inc. Integrated solid state light emitting and detecting array and apparatus employing said array
US5331176A (en) * 1992-04-10 1994-07-19 Veritec Inc. Hand held two dimensional symbol reader with a symbol illumination window
US5206881A (en) * 1992-04-15 1993-04-27 Telesystems Slw Inc. Wireless local area network
US5597997A (en) * 1992-12-18 1997-01-28 Nippondenso Co., Ltd. Optical information reader
US5389917A (en) * 1993-02-17 1995-02-14 Psc, Inc. Lapel data entry terminal
US5602376A (en) * 1993-05-07 1997-02-11 Psc Inc. Hand-mounted optical scanner system
US5406063A (en) * 1993-05-07 1995-04-11 Telxon Corporation Hand-held data scanner having adjustable keyboard panel
US5404002A (en) * 1993-05-17 1995-04-04 At&T Global Information Solutions Company Backup method for multiple source optical scanner
US5623137A (en) * 1993-08-20 1997-04-22 Welch Allyn, Inc. Illumination apparatus for optical readers
US5504317A (en) * 1994-01-05 1996-04-02 Opticon, Inc. Optical reader
US5942741A (en) * 1994-03-04 1999-08-24 Welch Allyn, Inc. Apparatus for optimizing throughput in decoded-output scanners and method of using same
US5965863A (en) * 1994-03-04 1999-10-12 Welch Allyn, Inc. Optical reader system comprising local host processor and optical reader
US6303929B1 (en) * 1994-03-17 2001-10-16 Hitachi Maxell, Ltd. Fluorescent substance, fluorescent composition, fluorescent mark carrier and optical reader therefor
US5932139A (en) * 1994-03-17 1999-08-03 Hitachi Maxell, Ltd. Fluorescent substance, fluorescent composition, fluorescent mark carrier and optical reader thereof
US5541419A (en) * 1994-03-21 1996-07-30 Intermec Corporation Symbology reader wth reduced specular reflection
US5894348A (en) * 1994-06-17 1999-04-13 Kensington Laboratories, Inc. Scribe mark reader
US5777743A (en) * 1994-06-17 1998-07-07 Kensington Laboratories, Inc. Scribe mark reader
US6398112B1 (en) * 1994-06-30 2002-06-04 Symbol Technologies, Inc. Apparatus and method for reading indicia using charge coupled device and scanning laser beam technology
US5763864A (en) * 1994-07-26 1998-06-09 Meta Holding Corporation Dataform reader including dual laser and imaging reading assemblies
US6439462B1 (en) * 1994-08-17 2002-08-27 Metrologic Instruments, Inc. Conveyor-belt mounted bar code symbol reading system employing a steerable bar code symbol scanner to automatically scan bar code symbols detected by a holographic-based bar code position detector
US6375074B1 (en) * 1994-08-17 2002-04-23 Metrologic Instruments, Inc. Holographic laser scanner for producing a highly-defined three-dimensional scanning volume having multiple focal regions within which the laser scanlines are spatially confined
US5975419A (en) * 1994-08-17 1999-11-02 Metrologic Instruments, Inc. Holographic laser scanner generating a high-resolution 2-D raster scanning pattern using a holographic scanning disc
US5696607A (en) * 1994-10-07 1997-12-09 Sharp Kabushiki Kaisha Image reader having a light-guiding transparent board
US5723868A (en) * 1995-05-15 1998-03-03 Welch Allyn, Inc. Illuminating assembly for use with bar code readers
US5780834A (en) * 1995-05-15 1998-07-14 Welch Allyn, Inc. Imaging and illumination optics assembly
US5784102A (en) * 1995-05-15 1998-07-21 Welch Allyn, Inc. Optical reader having improved interactive image sensing and control circuitry
US5739518A (en) * 1995-05-17 1998-04-14 Metanetics Corporation Autodiscrimination for dataform decoding and standardized recording
US5814827A (en) * 1995-05-19 1998-09-29 Symbol Technologies, Inc. Optical scanner with extended depth of focus
US5637854A (en) * 1995-09-22 1997-06-10 Microscan Systems Incorporated Optical bar code scanner having object detection
US6360949B1 (en) * 1995-10-10 2002-03-26 Symbol Technologies, Inc. Retro-reflective scan module for electro-optical readers
US5831254A (en) * 1995-12-18 1998-11-03 Welch Allyn, Inc. Exposure control apparatus for use with optical readers
US5717195A (en) * 1996-03-05 1998-02-10 Metanetics Corporation Imaging based slot dataform reader
US5955720A (en) * 1996-03-21 1999-09-21 Symbol Technologies, Inc. Semi-retroreflective scanners
US6223988B1 (en) * 1996-10-16 2001-05-01 Omniplanar, Inc Hand-held bar code reader with laser scanning and 2D image capture
US6015088A (en) * 1996-11-05 2000-01-18 Welch Allyn, Inc. Decoding of real time video imaging
US5914478A (en) * 1997-01-24 1999-06-22 Symbol Technologies, Inc. Scanning system and method of operation with intelligent automatic gain control
US6323503B1 (en) * 1997-01-29 2001-11-27 Accu-Sort Systems, Inc. CCD scanner having improved specular reflection discrimination
US6147358A (en) * 1997-01-29 2000-11-14 Accu-Sort Systems, Inc. CCD scanner having improved specular reflection discrimination
US5942762A (en) * 1997-01-29 1999-08-24 Accu-Sort Systems, Inc. CCD scanner having improved specular reflection discrimination
US5992744A (en) * 1997-02-18 1999-11-30 Welch Allyn, Inc. Optical reader having multiple scanning assemblies with simultaneously decoded outputs
US6298176B2 (en) * 1997-10-17 2001-10-02 Welch Allyn Data Collection, Inc. Symbol-controlled image data reading system
US6561428B2 (en) * 1997-10-17 2003-05-13 Hand Held Products, Inc. Imaging device having indicia-controlled image parsing mode
US5949052A (en) * 1997-10-17 1999-09-07 Welch Allyn, Inc. Object sensor system for stationary position optical reader
US6186404B1 (en) * 1998-05-29 2001-02-13 Welch Allyn Data Collection, Inc. Security document voiding system
US6155491A (en) * 1998-05-29 2000-12-05 Welch Allyn Data Collection, Inc. Lottery game ticket processing apparatus
US6547139B1 (en) * 1998-07-10 2003-04-15 Welch Allyn Data Collection, Inc. Method and apparatus for extending operating range of bar code scanner
US6655595B1 (en) * 1998-11-05 2003-12-02 Welch Allyn, Inc. Bar code reader configured to read fine print bar code symbols
US6595422B1 (en) * 1999-06-23 2003-07-22 Assure Systems, Inc. Bar code reader
US6578767B1 (en) * 1999-07-16 2003-06-17 Symbol Technologies, Inc. Low cost bar code reader
US6352204B2 (en) * 1999-08-04 2002-03-05 Industrial Data Entry Automation Systems Incorporated Optical symbol scanner with low angle illumination
US6832725B2 (en) * 1999-10-04 2004-12-21 Hand Held Products, Inc. Optical reader comprising multiple color illumination
US6585159B1 (en) * 1999-11-02 2003-07-01 Welch Allyn Data Collection, Inc. Indicia sensor system for optical reader
US6637658B2 (en) * 2001-01-22 2003-10-28 Welch Allyn, Inc. Optical reader having partial frame operating mode
US6722569B2 (en) * 2001-07-13 2004-04-20 Welch Allyn Data Collection, Inc. Optical reader having a color imager
US6834807B2 (en) * 2001-07-13 2004-12-28 Hand Held Products, Inc. Optical reader having a color imager

Cited By (86)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100014784A1 (en) * 1999-09-17 2010-01-21 Silverbrook Research Pty Ltd. Sensing Device For Subsampling Imaged Coded Data
US20040190085A1 (en) * 1999-09-17 2004-09-30 Silverbrook Research Pty Ltd Sensing device for coded data
US7605940B2 (en) * 1999-09-17 2009-10-20 Silverbrook Research Pty Ltd Sensing device for coded data
US8416468B2 (en) * 1999-09-17 2013-04-09 Silverbrook Research Pty Ltd Sensing device for subsampling imaged coded data
US8596542B2 (en) 2002-06-04 2013-12-03 Hand Held Products, Inc. Apparatus operative for capture of image data
US20140076974A1 (en) * 2002-06-04 2014-03-20 Hand Held Products, Inc. Apparatus operative for capture of image data
US8074887B2 (en) * 2002-06-04 2011-12-13 Hand Held Products, Inc. Optical reader having a plurality of imaging modules
US20160110577A1 (en) * 2002-06-04 2016-04-21 Hand Held Products, Inc. Apparatus operative for capture of image data
US9224023B2 (en) * 2002-06-04 2015-12-29 Hand Held Products, Inc. Apparatus operative for capture of image data
US20030226895A1 (en) * 2002-06-11 2003-12-11 Hand Held Products, Inc. Long range optical reader
US8016196B2 (en) * 2003-01-09 2011-09-13 Hand Held Products, Inc. Decoder board for an optical reader utilizing a plurality of imaging formats
US20060255144A1 (en) * 2003-01-09 2006-11-16 Meier Timothy P Decoder board for an optical reader utilizing a plurality of imaging formats
US9152835B2 (en) 2003-01-09 2015-10-06 Hand Held Products, Inc. Decoding utilizing image data
US7690572B2 (en) * 2003-01-09 2010-04-06 Hand Held Products, Inc. Decoder board for an optical reader utilizing a plurality of imaging formats
US8622303B2 (en) 2003-01-09 2014-01-07 Hand Held Products, Inc. Decoding utilizing image data
US20050024510A1 (en) * 2003-02-17 2005-02-03 Silverbrook Research Pty Ltd Image sensor with digital frame store
US20060027659A1 (en) * 2003-08-01 2006-02-09 Symbol Technologies, Inc. Integrated exit window and imaging engine
US20050023351A1 (en) * 2003-08-01 2005-02-03 Mehul Patel Imaging and illumination engine for an optical code reader
US7044377B2 (en) * 2003-08-01 2006-05-16 Symbol Technologies Inc. Plug-and-play imaging and illumination engine for an optical code reader
US20050145698A1 (en) * 2003-12-02 2005-07-07 Havens William H. Method and apparatus for reading under sampled bar code symbols
US7364081B2 (en) 2003-12-02 2008-04-29 Hand Held Products, Inc. Method and apparatus for reading under sampled bar code symbols
US20060043194A1 (en) * 2004-08-31 2006-03-02 Edward Barkan Scanner and method for eliminating specular reflection
US20070181692A1 (en) * 2004-08-31 2007-08-09 Edward Barkan Scanner and Method for Eliminating Specular Reflection
US7204420B2 (en) * 2004-08-31 2007-04-17 Symbol Technologies, Inc. Scanner and method for eliminating specular reflection
WO2006026141A1 (en) * 2004-08-31 2006-03-09 Symbol Technologies, Inc. Scanner and method for eliminating specular reflection
US7475821B2 (en) * 2004-08-31 2009-01-13 Symbol Technologies, Inc. Scanner and method for eliminating specular reflection
US7527207B2 (en) 2004-12-01 2009-05-05 Datalogic Scanning, Inc. Triggering illumination for a data reader
US20060180670A1 (en) * 2004-12-01 2006-08-17 Psc Scanning, Inc. Triggering illumination for a data reader
US7398927B2 (en) * 2005-01-26 2008-07-15 Datalogic Scanning, Inc. Data reader and methods for imaging targets subject to specular reflection
US20060163355A1 (en) * 2005-01-26 2006-07-27 Psc Scanning, Inc. Data reader and methods for imaging targets subject to specular reflection
US8720781B2 (en) 2005-03-11 2014-05-13 Hand Held Products, Inc. Image reader having image sensor array
US9465970B2 (en) 2005-03-11 2016-10-11 Hand Held Products, Inc. Image reader comprising CMOS based image sensor array
US9305199B2 (en) 2005-03-11 2016-04-05 Hand Held Products, Inc. Image reader having image sensor array
US8978985B2 (en) 2005-03-11 2015-03-17 Hand Held Products, Inc. Image reader comprising CMOS based image sensor array
US8733660B2 (en) 2005-03-11 2014-05-27 Hand Held Products, Inc. Image reader comprising CMOS based image sensor array
US9578269B2 (en) 2005-03-11 2017-02-21 Hand Held Products, Inc. Image reader comprising CMOS based image sensor array
US9576169B2 (en) 2005-03-11 2017-02-21 Hand Held Products, Inc. Image reader having image sensor array
US20090021181A1 (en) * 2005-04-19 2009-01-22 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Led module and led lighting unit with a plurality of led modules
US10002272B2 (en) 2005-06-03 2018-06-19 Hand Held Products, Inc. Apparatus having hybrid monochrome and color image sensor array
US9092654B2 (en) 2005-06-03 2015-07-28 Hand Held Products, Inc. Digital picture taking optical reader having hybrid monochrome and color image sensor array
US8720785B2 (en) 2005-06-03 2014-05-13 Hand Held Products, Inc. Apparatus having hybrid monochrome and color image sensor array
US9058527B2 (en) 2005-06-03 2015-06-16 Hand Held Products, Inc. Apparatus having hybrid monochrome and color image sensor array
US8196839B2 (en) 2005-06-03 2012-06-12 Hand Held Products, Inc. Optical reader having reduced specular reflection read failures
US8002188B2 (en) 2005-06-03 2011-08-23 Hand Held Products, Inc. Method utilizing digital picture taking optical reader having hybrid monochrome and color image sensor
US7780089B2 (en) 2005-06-03 2010-08-24 Hand Held Products, Inc. Digital picture taking optical reader having hybrid monochrome and color image sensor array
US8720784B2 (en) 2005-06-03 2014-05-13 Hand Held Products, Inc. Digital picture taking optical reader having hybrid monochrome and color image sensor array
US7770799B2 (en) 2005-06-03 2010-08-10 Hand Held Products, Inc. Optical reader having reduced specular reflection read failures
US9454686B2 (en) 2005-06-03 2016-09-27 Hand Held Products, Inc. Apparatus having hybrid monochrome and color image sensor array
US9438867B2 (en) 2005-06-03 2016-09-06 Hand Held Products, Inc. Digital picture taking optical reader having hybrid monochrome and color image sensor array
US20070063048A1 (en) * 2005-09-14 2007-03-22 Havens William H Data reader apparatus having an adaptive lens
US20070295814A1 (en) * 2006-06-22 2007-12-27 Denso Wave Incorporated Apparatus for optically reading information stored in graphic symbol
US8800873B2 (en) * 2006-06-22 2014-08-12 Denso Wave Incorporated Apparatus for optically reading information stored in graphic symbol
EP3035232A1 (en) * 2007-06-04 2016-06-22 Hand Held Products, Inc. Indicia reading terminal processing plurality of frames of image data responsively to trigger signal activation
US9996720B2 (en) 2007-06-04 2018-06-12 Hand Held Products, Inc. Indicia reading terminal processing plurality of frames of image data responsively to trigger signal activation
US20090026267A1 (en) * 2007-06-04 2009-01-29 Hand Held Products, Inc. Indicia reading terminal processing plurality of frames of image data responsively to trigger signal activation
US8794526B2 (en) * 2007-06-04 2014-08-05 Hand Held Products, Inc. Indicia reading terminal processing plurality of frames of image data responsively to trigger signal activation
EP2385481A1 (en) * 2007-06-04 2011-11-09 Hand Held Products, Inc. Indicia reading terminal processing plurality of frames of image data responsively to trigger signal activation
US20090127343A1 (en) * 2007-11-20 2009-05-21 Chin-Chang Chiang Scan module support and electronic device thereof
US9275263B2 (en) * 2008-11-26 2016-03-01 Symbol Technologies, Llc Imaging reader with plug-in imaging modules for electro-optically reading indicia
US20100127082A1 (en) * 2008-11-26 2010-05-27 Mark Drzymala Imaging reader with plug-in imaging modules for electro-optically reading indicia
US20110163165A1 (en) * 2010-01-07 2011-07-07 Metrologic Instruments, Inc. Terminal having illumination and focus control
US9292723B2 (en) 2010-01-21 2016-03-22 Honeywell International Inc. Indicia reading terminal including optical filter
US8640958B2 (en) 2010-01-21 2014-02-04 Honeywell International, Inc. Indicia reading terminal including optical filter
US9501678B2 (en) 2010-01-21 2016-11-22 Honeywell Internations, Inc. Indicia reading terminal including optical filter
US8387881B2 (en) 2010-12-01 2013-03-05 Hand Held Products, Inc. Terminal with screen reading mode
US9418270B2 (en) 2011-01-31 2016-08-16 Hand Held Products, Inc. Terminal with flicker-corrected aimer and alternating illumination
US8561903B2 (en) 2011-01-31 2013-10-22 Hand Held Products, Inc. System operative to adaptively select an image sensor for decodable indicia reading
US9659199B2 (en) 2011-01-31 2017-05-23 Hand Held Products, Inc. Terminal with flicker-corrected aimer and alternating illumination
US8537245B2 (en) 2011-03-04 2013-09-17 Hand Held Products, Inc. Imaging and decoding device with quantum dot imager
US9489557B2 (en) 2011-06-27 2016-11-08 Hand Held Products, Inc. Decodable indicia reading terminal with optical filter
US8636215B2 (en) 2011-06-27 2014-01-28 Hand Held Products, Inc. Decodable indicia reading terminal with optical filter
US9224025B2 (en) 2011-06-27 2015-12-29 Hand Held Products, Inc. Decodable indicia reading terminal with optical filter
US8640960B2 (en) 2011-06-27 2014-02-04 Honeywell International Inc. Optical filter for image and barcode scanning
US8985459B2 (en) 2011-06-30 2015-03-24 Metrologic Instruments, Inc. Decodable indicia reading terminal with combined illumination
US9087249B2 (en) 2011-09-30 2015-07-21 Hand Held Products, Inc. Devices and methods employing dual target auto exposure
US9734370B2 (en) 2011-09-30 2017-08-15 Hand Held Products, Inc. Devices and methods employing dual target auto exposure
US8646692B2 (en) 2011-09-30 2014-02-11 Hand Held Products, Inc. Devices and methods employing dual target auto exposure
US8608071B2 (en) 2011-10-17 2013-12-17 Honeywell Scanning And Mobility Optical indicia reading terminal with two image sensors
US9292722B2 (en) 2011-12-13 2016-03-22 Honeywell International, Inc. Apparatus comprising image sensor array and illumination control
US9262661B2 (en) 2011-12-13 2016-02-16 Honeywell International, Inc. Optical readers and methods employing polarization sensing of light from decodable indicia
US8628013B2 (en) 2011-12-13 2014-01-14 Honeywell International Inc. Apparatus comprising image sensor array and illumination control
US8881983B2 (en) 2011-12-13 2014-11-11 Honeywell International Inc. Optical readers and methods employing polarization sensing of light from decodable indicia
US8777108B2 (en) 2012-03-23 2014-07-15 Honeywell International, Inc. Cell phone reading mode using image timer
US9087250B2 (en) 2012-03-23 2015-07-21 Honeywell International, Inc. Cell phone reading mode using image timer
US8978981B2 (en) 2012-06-27 2015-03-17 Honeywell International Inc. Imaging apparatus having imaging lens
USD734753S1 (en) 2014-04-17 2015-07-21 Faro Technologies, Inc. Laser scanning device

Also Published As

Publication number Publication date Type
US20050279836A1 (en) 2005-12-22 application
US20030222147A1 (en) 2003-12-04 application
US8074887B2 (en) 2011-12-13 grant

Similar Documents

Publication Publication Date Title
US6708883B2 (en) Apparatus and method for reading indicia using charge coupled device and scanning laser beam technology
US5241164A (en) Method of decoding bar code symbols from partial scans
US8868802B2 (en) Method of programming the default cable interface software in an indicia reading device
US7222793B2 (en) Arrangement and method of imaging one-dimensional and two-dimensional optical codes at a plurality of focal planes
US7159783B2 (en) Customizable optical reader
US20030201328A1 (en) Apparatus for capturing images and barcodes
US6223988B1 (en) Hand-held bar code reader with laser scanning and 2D image capture
US5664229A (en) Accessory for conversion with housing with first connection includes host cable and host connector and second connection including a plug-in modular connector
US8783573B2 (en) Indicia reading terminal having plurality of optical assemblies
US20040004128A1 (en) Optical reader system comprising digital conversion circuit
US20090108071A1 (en) Automatic Region of Interest Focusing for an Imaging-Based Bar Code Reader
US6598797B2 (en) Focus and illumination analysis algorithm for imaging device
US8789758B2 (en) Picture taking reading apparatus
US6003773A (en) Tablet style indicia reader with system for handling multiple indicia
US6695209B1 (en) Triggerless optical reader with signal enhancement features
US8628015B2 (en) Indicia reading terminal including frame quality evaluation processing
US5672858A (en) Apparatus and method for reading indicia using charge coupled device and scanning laser beam technology
US6176429B1 (en) Optical reader with selectable processing characteristics for reading data in multiple formats
US5534684A (en) Portable optical reader with motion sensing system and method
US5777314A (en) Optical scanner with fixed focus optics
US6494375B1 (en) Information-code-image capturing apparatus
US5019699A (en) Hand-held optical character reader with means for instantaneously reading information from a predetermined area at an optical sensing area
US8646694B2 (en) Indicia reading terminal including frame processing
US20060043191A1 (en) System and method for aiming an optical code scanning device
US5837987A (en) Hand-held optically readable character set reader having automatic focus control for operating over a range of distances

Legal Events

Date Code Title Description
AS Assignment

Owner name: HAND HELD PRODUCTS, INC., NEW YORK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HAVENS, WILLIAM H.;BARBER, CHARLES P.;GANNON, COLLEEN;AND OTHERS;REEL/FRAME:015020/0792;SIGNING DATES FROM 20020826 TO 20020827