WO2001026036A9 - Imaging module for optical reader - Google Patents
Imaging module for optical readerInfo
- Publication number
- WO2001026036A9 WO2001026036A9 PCT/US2000/027289 US0027289W WO0126036A9 WO 2001026036 A9 WO2001026036 A9 WO 2001026036A9 US 0027289 W US0027289 W US 0027289W WO 0126036 A9 WO0126036 A9 WO 0126036A9
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- module
- circuit board
- frame
- image sensor
- light source
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10712—Fixed beam scanning
- G06K7/10722—Photodetector array or CCD scanning
- G06K7/10742—Photodetector array or CCD scanning including a diffuser for diffusing the light from the light source to create substantially uniform illumination of the target record carrier
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10712—Fixed beam scanning
- G06K7/10722—Photodetector array or CCD scanning
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10712—Fixed beam scanning
- G06K7/10722—Photodetector array or CCD scanning
- G06K7/10732—Light sources
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
- G06K7/10881—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices constructional details of hand-held scanners
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
- G06K7/10881—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices constructional details of hand-held scanners
- G06K7/109—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices constructional details of hand-held scanners adaptations to make the hand-held scanner useable as a fixed scanner
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
- G06K7/1098—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices the scanning arrangement having a modular construction
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/14—Methods 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
- G06K7/1404—Methods for optical code recognition
- G06K7/1408—Methods for optical code recognition the method being specifically adapted for the type of code
- G06K7/1417—2D bar codes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K2207/00—Other aspects
- G06K2207/1011—Aiming
Definitions
- the present invention relates to optical reading devices in general and in particular to an apparatus for packaging
- illumination optical elements receive optical elements, and signal processing elements of an optical reader.
- optical readers include illumination elements, electronic signal processing circuits, image capture
- 5,780,834 is an optical reader having numerous circuit boards, including an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs, an LED board for carrying illumination LEDs
- imaging board carrying an image sensor and circuitry for processing signals generated from the image sensor, and a
- mother board carrying image capture and decoding circuitry.
- U.S. Patent No. 5,521,366 describes a modular housing having a rear printed circuit board, a front printed circuit board and a LED circuit board on which LEDs are mounted.
- Assembly of a prior art reader requires mounting of separate circuit boards to separate internal structures of a reader, and providing electrical connection between the ultiple circuit boards.
- the multiple circuit board design imposes size
- present invention is a module for packaging optical
- optical reader illumination, optical receive, and electrical signal processing components of an optical reader.
- the module includes a frame which carries a printed
- circuit board preferably a printed circuit board (PCB) and
- the frame is configured to various optical components.
- the frame is configured to be any one optical components.
- the frame is configured to be any one optical components.
- a back plate having a retainer for receiving an optical lens barrel, and a recess for receiving and aligning
- the frame may
- the PCB is first mounted onto the frame's back
- the LEDs may be mounted so that a
- a lens barrel is incorporated in the retainer, then an aperture plate having domed apertures for shaping light rays emanating from the aiming LEDs is placed over the
- diffusing light rays emanating from the illumination LEDs is snap-fit into the frame.
- the optical plate may also include optical
- the aiming LEDs and their associated optics project
- the printed circuit board may be a full function printed circuit board which carries a solid state image sensor and
- Circuitry incorporated in the single PCB includes signal processing circuitry for processing
- image capture circuitry for storing image data
- decoding and/or recognizing circuitry for decoding and/or recognizing indicia
- Fig. 1A is a front perspective assembly diagram
- Fig. IB is a rear perspective assembly diagram
- Fig 1C is a front perspective view of an assembled image capture module according to the invention.
- Fig. ID is a rear perspective view of an assembled image
- Fig. IE is a representation of a preferred illumination
- Fig. IF is a block diagram for illustration of functional
- Figs. 2A - 21 are perspective views of various optical elements
- Fig. 3 is a side view of a prior art reader illustrating a prior art multiple circuit board arrangement. Detailed Description of the Invention
- Imaging module 10 An embodiment of an imaging module 10 according to the invention is shown in Figs. 1A through ID. Imaging module 10
- OCR optical character recognition
- module 10 may also find use in other devices requiring image
- Module 10 includes a mounting frame 12 which is adapted
- mounting frame 12 is configured to receive both electrical components and optical components of an imaging system. Specifically, mounting frame 12
- a circuit board such as a printed circuit board (PCB) 14, illumination LEDs 16, aiming LEDs 18, aperture plate 24 and optical plate 26.
- PCB printed circuit board
- the frame 12 includes a back plate 30
- Back plate 30 includes a recess 34 for receiving a solid state image sensor chip 32 and a plurality
- Back plate 30 further includes a retainer 40 for receiving a receive optics lens assembly 41, e.g. a lens barrel, which may be
- PCB 14 is first mounted to back plate 30 using screws 56 and frame 12 is oriented so that
- an assembler mounts illumination LEDs 16 and aiming LEDs 18 to PCB 14.
- LEDs 16 and 18 be oriented for easy access by an assembler. To the end that LEDs 16 and 18 remain in a desired orientation which is
- a standardly known fixture (not shown) shaped to receive LEDs 16 and 18 can be temporarily applied over LEDs 16 and 18 through the soldering process .
- An important feature of the imaging module is that leads
- the aperture plate 24 is mounted into the frame 12, the frame having domes 42 which fit over the aiming LEDs 18.
- the domes are preferably opaque to
- Slit apertures 43 should be formed so that a desired shaped aiming pattern of illumination is projected onto a target, T.
- slit apertures 43 are shaped rectangularly so that
- a horizontal line pattern is projected onto a target.
- Aperture plate 24 further includes a number of cutaway sections 46 providing clearance to allow the aperture plate to
- the domes 42 and cutaway sections 46 are formed so they do not contact LEDs 16.
- each LED is held in a desired orientation while being soldered, so that the flat surfaces of
- LED bases 17 are biased against the flat surface of back plate
- plate 24 includes a shroud 58 for preventing light transmitted by the LEDs 16 and 18 from interfering with the receive optical system of the module.
- optical plate 26 is snap-fitted into the opening 13 of the frame 12. Optical plate 26
- diffusers 27 for diffusing light emanating from the
- optical plate 26 may further have wedges 28 formed on an inner surface thereof. Wedges 28
- Resilient fingers 48 having hook ends 49 are formed in
- the optical plate 26 is snap-fitted onto the frame 12 by pulling back the resilient fingers 48, pushing the optical plate toward the back plate 30, then releasing the fingers 48 to lock plate 26 in position inside module 10.
- aperture plate 24 includes spacers 52 which operate to bias aperture plate 24 toward back plate 30 when optical plate 26 is snap fitted onto frame 12. The spacers 52 further transfer
- optical plate 26 inside frame 12 without the use of adhesives or outside mechanical securing means, such as screws or pins.
- Fig. IE area 72
- Fig. IE aiming LEDs 18 and their associated optics project a solitary horizontal aiming line 74 onto a target area T.
- the straight line aiming pattern of Fig. IE may be
- oriented cylindrical lenses 25 are formed on the outer surface
- optical plate 26 as is shown in Fig. 1A.
- Horizontally oriented cylindrical lenses 25 are formed so that when plate
- LEDs 18 lenses 25 are aligned coextensively and forwardly relative to slit apertures 43 in order to collimate and thereby image light from slit apertures 43 onto a target T, defined by a module's field of view.
- an aiming illumination source 53 is mounted
- circuit boards 54, 56 and electrical connectors between the circuit boards such as connector 57 Providing a single circuit board that carries an image sensor, illumination LEDs,
- Another important aspect of the invention is that essentially all electronic circuitry supporting the data processing operations required of module 10 are located on single, full function PCB 14, including
- circuitry for processing signals generated from image sensor 32 circuitry for capturing image data into a memory device
- circuitry for decoding and/or recognizing indicia represented
- Circuitry for supporting serial transfers of data to peripheral devices may also be carried by
- circuitry for processing signals from an image sensor circuitry for capturing and decoding image data and circuitry
- a first vertically oriented circuit board 56 is provided for
- mother board 60 known as a "mother board” is provided for carrying
- circuitry for storing image data and for decoding symbologies .
- the one PCB design of the present invention provides numerous advantages over the two PCB design of the prior art.
- the first circuit board 58 is mounted to a first internal structure of the reader in which it is incorporated, the second circuit
- frame's back plate 30 should be configured to accommodate electrical components that will extend forward from the front surface 15 of PCB 14. Accordingly it is seen that the rear
- back plate 30 includes a central recess 34 for
- peripheral recesses 35 for accommodating electrical circuitry such as components and/or conductors which may protrude from the front surface of PCB 1 .
- module 10 As best seen in Figs. 1C and ID,
- sidewalls 31 and 31' of frame 10, together with PCB 14 and plate 26 define a module having a substantially cubic rectangular overall form.
- the cubic rectangular form is
- module 10 Another feature relating to the outer configuration of module 10, is that the defined outer walls of module 10 serve
- module 10 and image sensor 32, are disposed inside a
- substantially rigid containment structure defined by sidewalls 31, 31' and PCB 12 and the combination of sidewalls 31, 31' and optical plate 26.
- components of the module provided by the combination of sidewalls 31, 31' and PCB 14 and/or the combination of sidewalls 31, 31' and optical plate 26 eliminate the need to package the module with shock absorbing material such as
- the containment structure namely PCB 14 and optical plate 26, provide functions important to the operation of module 10
- optical plate 26 so that they provide containment functions in addition to the respective electrical signal processing and optical functions reduces the cost of module 10 relative to the cost of a module in which separate rigid members are arranged to provide the containment functions provided by PCB 14 and/or plate 26 in module 10.
- Optical reader 110 includes an illumination assembly 120 for illuminating a target object T, such as a ID or 2D bar
- Illumination assembly 120 may, for example, include an
- illumination source assembly 122 such as one or more LEDs
- an illuminating optics assembly 124 such as one
- lenses, reflectors or other optical elements such as diffusers and wedges 27 and 28, for directing light from light source 122 in the direction of target object T.
- Illumination assembly 120 may
- Imaging assembly 130 may include an image sensor 132, such as
- the array-based imaging assembly shown in Fig. IF may be replaced by a laser array based imaging assembly comprising multiple laser sources, a scanning mechanism, emit and receive
- optics at least one photodetector and accompanying signal
- Optical reader 110 of Fig. IF also includes programmable control unit 140 which preferably comprises an integrated circuit microprocessor 142 and an application specific
- ASIC 1444 The function of ASIC 144 could be any type of integrated circuit (ASIC 144) .
- ASIC 144 could be any type of integrated circuit (ASIC 144) .
- the function of ASIC 144 could be any type of integrated circuit (ASIC 144) .
- FPGA field programable gate array
- RAM 146 which may comprise such memory elements as a read/write random access memory or RAM 146 and an erasable read only memory or
- RAM 146 typically includes at least one volatile
- memory device but may include one or more long term non-record
- Processor 142 and ASIC 144 are also volatile memory devices.
- Processor 142 and ASIC 144 are also volatile memory devices.
- Processor 142 and ASIC 144 differ from one
- processor 142 is preferably a general purpose processor
- Processor 144 which has overall control of the circuitry of Fig. 2, but which devotes most of its time to decoding image data stored in RAM 146 in accordance with program data stored in EROM 147.
- Processor 144 is preferably a special
- VLSI integrated circuit such as a programmable logic
- microprocessors that are available, the type of image sensor which is used, the rate at which image data is output by imaging assembly 130, etc. There is nothing in principle,
- processor 144 may be eliminated entirely if general purpose processor 142 is fast enough and powerful enough to perform
- processors 142 and 144 a typical division of labor between processors 142 and 144 will be as follows.
- Processor 142 is preferably devoted primarily to such tasks as decoding image data, once such data
- RAM 146 has been stored in RAM 146, recognizing characters represented in stored image data according to an optical character recognition (OCR) scheme, handling menuing options and
- OCR optical character recognition
- control/data input unit 139 which may comprise such
- Processor 144 is preferably
- Processor 144 may also perform many timing and
- Processor 144 may, for example, control the illumination of LEDs 122, the timing of image
- A/D analog-to-digital
- an output device 138 such as a beeper, a good read LED and/or a display monitor which may be provided
- liquid crystal display such as display 182.
- Control of output, display and I/O functions may also be shared between
- processors 142 and 144 may be duplicated, as suggested by microprocessor serial I/O ports 142A and 142B and
- I/O and display devices 137" and 138' As explained earlier, the specifics of this division of labor is of no significance to the present invention.
- Fig. IF may be carried by a single circuit
- 137, 137' and 137" can be incorporated in a single integrated circuit chip of reduced size. Further, as explained in an
- image sensor 132 signal processing components 135, 136, and components 142, 144, 146, 147, 137, 137' and
- FIGs . 2A through 2H show examples of types of housings in which the present invention may be incorporated.
- Figs. 2A and 2B show a ID optical reader 110-1, while Figs. 2C-2H show 2D
- optical readers 110-2, 110-3 and 110-4 Housing 112 of each
- optical readers 110-1 through 110-4 has incorporated therein is adapted to be graspable by a human hand and at
- At least one trigger switch 174 for activating image capture and decoding and/or image capture and character recognition
- Readers 110-1, 110-2 and 110-3 include hard-wired communication links 178 for communication with external
- reader 110-4 includes an antenna 180 for providing wireless communication with an external device such as another data collection device or a host processor.
- a keyboard 184 for enabling a user to input commands and data into the reader.
- 2A through 2H may be mounted in a stationary position as is
- FIG. 21 showing a generic optical reader 110 docked in a scan stand 190.
- Scan stand 190 adapts portable
- optical reader 110 for presentation mode scanning.
- reader 110 In a presentation mode, reader 110 is held in a stationary position
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001528921A JP2003532944A (en) | 1999-10-04 | 2000-10-04 | Imaging module for optical reader |
AU79920/00A AU7992000A (en) | 1999-10-04 | 2000-10-04 | Imaging module for optical reader |
EP00970558A EP1226541A2 (en) | 1999-10-04 | 2000-10-04 | Imaging module for optical reader |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US41193699A | 1999-10-04 | 1999-10-04 | |
US09/411,936 | 1999-10-04 |
Publications (3)
Publication Number | Publication Date |
---|---|
WO2001026036A2 WO2001026036A2 (en) | 2001-04-12 |
WO2001026036A3 WO2001026036A3 (en) | 2002-01-10 |
WO2001026036A9 true WO2001026036A9 (en) | 2002-10-03 |
Family
ID=23630883
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/027289 WO2001026036A2 (en) | 1999-10-04 | 2000-10-04 | Imaging module for optical reader |
Country Status (6)
Country | Link |
---|---|
US (2) | US7296751B2 (en) |
EP (1) | EP1226541A2 (en) |
JP (1) | JP2003532944A (en) |
CN (1) | CN1391680A (en) |
AU (1) | AU7992000A (en) |
WO (1) | WO2001026036A2 (en) |
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-
2000
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AU7992000A (en) | 2001-05-10 |
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JP2003532944A (en) | 2003-11-05 |
US20070152055A1 (en) | 2007-07-05 |
US7296751B2 (en) | 2007-11-20 |
WO2001026036A2 (en) | 2001-04-12 |
US20040195328A1 (en) | 2004-10-07 |
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CN1391680A (en) | 2003-01-15 |
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