EP2030058A1 - Videosystem für ein spleissgerät und verfahren zum betreiben eines videosystems für ein spleissgerät - Google Patents
Videosystem für ein spleissgerät und verfahren zum betreiben eines videosystems für ein spleissgerätInfo
- Publication number
- EP2030058A1 EP2030058A1 EP07764756A EP07764756A EP2030058A1 EP 2030058 A1 EP2030058 A1 EP 2030058A1 EP 07764756 A EP07764756 A EP 07764756A EP 07764756 A EP07764756 A EP 07764756A EP 2030058 A1 EP2030058 A1 EP 2030058A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- camera
- interface
- video system
- image
- processor
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims description 14
- 230000006870 function Effects 0.000 claims abstract description 12
- 238000005286 illumination Methods 0.000 claims description 47
- 239000013307 optical fiber Substances 0.000 claims description 9
- 230000004044 response Effects 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 claims description 3
- 239000000835 fiber Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 239000003365 glass fiber Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000012447 hatching Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2551—Splicing of light guides, e.g. by fusion or bonding using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/37—Testing of optical devices, constituted by fibre optics or optical waveguides in which light is projected perpendicularly to the axis of the fibre or waveguide for monitoring a section thereof
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2555—Alignment or adjustment devices for aligning prior to splicing
Definitions
- the invention relates to a video system for a splicer and a method for operating a video system for a splicer.
- the invention further relates to a use of the video system.
- fiber optic cables such as fiber optic cables can be spliced, that is, interconnected.
- the splicer aligns the two ends of the glass fibers to be spliced to one another and thermally fuses them, for example by welding via an arc.
- splicing devices use video systems with one or more cameras. Complementary metal oxide semiconductors, CMOS cameras with image data in digital form, or batch-coupled devices, CCD cameras can be used. When a camera delivers an analog video signal, it is typically converted to a digital video format via an analog-to-digital converter.
- the image data of the cameras can be evaluated in a microprocessor, for example, to make an adjustment of the glass fibers.
- Two or more cameras can be used to ensure positioning for three coordinate axes.
- the cameras are typically connected to the microprocessor via programmable logic such as a Programmable Logic Device, PLD, or a Field Programmable Gate Array (FPGA).
- the programmable logic has the task of ensuring a time control, English timing, buffer the image data and allow access to rows and columns of image data.
- special camera functions can be controlled.
- An FPGA for a video system is addressed, for example, via a 16-bit data bus and a 24-bit address bus. Similar to a microcontroller, commands for controlling an FPGA can be stored in a memory, from where they can be transferred to the FPGA as needed.
- Such an FPGA or a comparable programmable logic requires a relatively high number of lines, which have a correspondingly large space requirement, for example on a circuit board.
- the additional clock signals usually impair the electromagnetic compatibility, EMC and increase the circuit complexity.
- a video system for a splicer includes a processor having an on-chip integrated camera interface. Furthermore, a first and a second camera are provided.
- a selector includes an interface output coupled to the camera interface, a first interface input coupled to the first camera, a second interface input coupled to the second camera, and a control input for providing a selection signal.
- the first or the second interface input can be coupled to the interface output as a function of the selection signal.
- Both image data can be received via the chip-internal camera interface and control signals for controlling functions of a camera connected in each case via the selection device can be output.
- the circuit complexity of the video system for a splicer can be significantly reduced.
- FIG. 1 shows an embodiment of a video system according to the invention
- FIG. 2 shows an exemplary embodiment of a selection device according to the invention
- FIG. 3 shows an exemplary block diagram of a selection device with connected cameras according to the invention
- FIG. 4 shows an exemplary block diagram of a selection device with cameras and illumination sources according to the invention
- FIG. 5 shows an exemplary embodiment of a conventional camera arrangement with illumination sources
- FIG. 6A shows a first exemplary representation of a lighted optical fiber
- FIG. 6B shows a second exemplary representation of a lighted optical fiber
- Figure 7 shows an embodiment of a camera arrangement with illumination sources according to the invention and Figure 8 is an exemplary signal-time diagram for a
- FIG. 1 shows an embodiment of a video system for a splicer.
- a processor 1 a selection device 2 and a first and a second camera 3, 4 are provided.
- the camera 3 is connected with a connection 31 to a first interface input 21 of the selection device 2.
- the camera 4 is coupled to a port 41 to a second interface input 22 of the selector 2.
- An interface output 29 of the selection device 2 is connected to a chip-integrated camera interface 11 of the processor 1.
- the connection lines of the cameras 3, 4 and the processor 1 to the selection device 2 are designed in the embodiment as a data bus having a plurality of parallel data lines.
- a selection signal can be supplied, in whose dependency alternatively the first interface input 21 or the second interface input 22 is coupled to the interface output 29.
- the connection 31 of the first camera 3 or the connection 41 of the second camera 4 is coupled to the camera interface 11 of the processor 1.
- the selection signal can also be generated by the processor 1.
- image data CAM can be received. This can be done, for example, in digital form, so that the image data CAM in digitized form in the Processor can be read. If image signals CAM are in analog form, they can be converted into a digitized form, for example via an analog-to-digital converter, before they are supplied to the camera interface 11. Alternatively, the processor 1 has a camera interface 11 with an analog input for analog image signals CAM.
- Control signals CTRL for controlling a camera 3, 4 coupled to the camera interface 11 via the selection device 2 can also be output via the on-chip integrated camera interface 11.
- the control signals CTRL can be used to access functions of the connected camera. For example, sensitivity, shutter speeds, sharpness or other functions can be set. It is also possible via the control signals CTRL to select an image section which is to be transmitted as an image signal to perform a reflection or a rotation of the image ⁇ cutout in the camera or to have also ablackab- perform the same in the camera.
- several data lines can be provided. For example, four data lines are provided for the control signals CTRL and ten data lines for the image signals CAM.
- the cameras 3, 4 may be implemented as CMOS cameras or alternatively as CCD cameras. It is also possible to use cameras with other technologies as long as an image signal in each case can be output in a format suitable for the camera interface 11 or converted into the appropriate format.
- the processor 1 is a processor from Intel XScale ® ® can be used for example, the on-chip via an appropriate camera interface 11 comparable added. Otherwise, the operating system is executed on the processor 1, which, inter alia, can provide a graphical user interface with menus and screen messages. Further, running on the processor 1 is a control program for the splicing process and a program for various calculations, control tasks and control tasks.
- the processor 1 may be a monolithically integrated component in which the camera interface 11 and the processor are integrated together on the same chip.
- the selection device 2 can be arranged outside the processor, for example on a further chip. Alternatively, a processor 1 can be provided in which the selection device 2 is integrated into the processor 1.
- the processor 1 including, for example, its various registers, its arithmetic logic unit or arithmetic logic unit (ALU), its control unit and its memory manager are integrated together with the camera interface 11 monolithically on a single semiconductor device.
- This semiconductor device can be installed in a processor housing with corresponding terminals or connection pins.
- the chip-integrated camera interface 11 is guided via corresponding connection lines or other electrical connections to one or more associated connection pins of the processor housing, which may be connected to a printed circuit board.
- the on-chip camera interface can receive both image data and control signals for controlling functions of a camera.
- the interface can be used both as a parallel interface with multiple data lines for the transmission of image signals and control signals as well as be designed as a serial interface.
- Image data received via the camera interface 11 can be stored in a main memory of the processor 1.
- the cameras 3, 4 deliver digital image signals, that is to say image signals in digital form
- the cameras 3, 4 or the selection device 2 can be connected directly to a digitally executed camera interface 11.
- the interface output 29 of the selection device 2 can be electrically connected to the camera interface 11 via a cable connection or a connection on a printed circuit board.
- a respective analog-to-digital converter for converting analog image signals into digital image signals outside the processor 1 and in this case digitally executed camera interface 11 may be provided.
- the analog-to-digital converter is arranged outside the processor housing.
- an analog-to-digital converter together with the modules of the processor 1, in particular the camera interface 11 may be monolithically integrated on a semiconductor device.
- the camera interface 11 is designed, for example, as an analog interface, which is electrically connected to connection pins of the processor housing.
- the selection device 2 or corresponding cameras can be directly connected to this analog camera interface 11 or the corresponding connection pins - S -
- the cameras 3, 4 are provided for observation of the fibers to be spliced. Among other things, this serves to align the fibers before the actual splicing process.
- the fibers may be, for example, glass fibers or plastic fibers.
- the video system is also used to detect fibers in the splicer.
- an optical examination of fibers may be made, for example, with respect to contamination of the fibers, a surface of the end faces of the fibers or an angle of the end faces.
- an optical examination of the splicing result can be carried out by the video system.
- a control of the above-described operations can, for example, by appropriate software or programs that run on the processor 1 done.
- control signals CTRL can also be received by the camera interface and forwarded to the selected camera.
- control signals CTRL in addition to the possibilities described above, a control of the respectively selected camera can be performed and / or a read operation of an image from the camera as an image signal CAM can be initiated.
- one of the control signals CTRL can be used to control a readout time or transmission time of an image recorded by the camera 3, 4.
- timing of the selection device 2 can be done via the selection signal, it is not necessary in contrast to previous solutions in the embodiment of the video system according to the invention to provide a clock generation for the selector 2.
- a synchronization can for example be done directly between processor 1 and selected camera 3, 4. Timing problems can thus be reduced or avoided.
- a splicer with a video system can be provided with reduced effort.
- a video system can be better integrated and requires less space, since it is possible to dispense with external synchronization devices and temporary storage for temporarily storing image data.
- the use of the processor 1 with integrated camera interface 11 enables a uniform software interface for image processing.
- Figure 2 shows an embodiment of a selector 2 according to the invention, as it can be used for example in the embodiment in Figure 1.
- the selector device 2 has connections 21a to 21n for the first interface input 21 and connections 22a to 22n for the first interface input 21 second interface input 22 on.
- the number of terminals 21a to 21n and 22a to 22n depends on the number of data lines for transmitting the image data or the image signal and the number of lines for the transmission of the control signals.
- connections 29a to 29n are provided for the interface output 29.
- the terminals 29a to 29n can be coupled to the terminals 21a to 21n via switches SIa to SIn, which are switched together.
- the terminals 29a to 29n may be coupled to the terminals 22a to 22n via switches S2a to S2n.
- the switches S2a to S2n are also driven together.
- the control takes place via the selection signal at the control input 28.
- image data or image signals CAM or control signals CTRL can be transmitted from and to the connected cameras to and from the camera interface 11 connected to the connections 29a to 29n.
- the switches SIa to SIn and S2a to S2n can be implemented, for example, by bipolar or field effect transistors or other electronically switchable elements.
- the function of the selector 2 may also be formed by a programmable logic circuit such as an FPGA. As a programmable logic circuit and a PLD can be used.
- FIG. 3 shows, in an exemplary block diagram, an exemplary embodiment of a selection device 2 with connected cameras.
- an additional third camera 8 with a connection 81 is provided.
- the further camera 8 is connected to a further interface input 23 of the selection device 2.
- the further interface input 23 can also be coupled to the interface output 29 as a function of the selection signal at the control input 28.
- the camera 8 receives another image signal.
- the further camera 8 can also be selected and its image signal can be forwarded via the interface output 29 to the camera interface 11 of the processor 1, not shown here.
- FIG. 4 shows a block diagram of an embodiment of the invention with a selection device 2, cameras 3, 4 and illumination sources 5, 6.
- a processor 1 with camera interface 11 is not shown in FIG. 4 for reasons of clarity.
- an illumination source 5 is provided for the camera 3 and the illumination source 6 for the camera 4.
- the illumination sources 5, 6 are designed as light emitting diodes, English light emitting diodes, LED. However, other bulbs than illumination sources 5, 6 may be provided.
- the selection device 2 has a first and a second control output 210, 220 for controlling the illumination sources 5, 6.
- the first control output 210 is coupled to a supply device 51 for the illumination source 5.
- the second control output 220 is coupled to a supply device 61 for the illumination source 6.
- the supply devices 51, 61 serve, for example, a voltage supply or a power supply of the light-emitting diodes 5, 6.
- FIG. 5 shows an exemplary embodiment of a conventional camera arrangement with illumination sources.
- light-emitting diodes of different color are provided as illumination sources 5, 6, characterized by a different hatching of the LEDs 5, 6.
- an optical fiber 7 is illuminated.
- lenses 33, 43 for imaging the object, that is to say the optical fiber 7, are provided on a camera-tip surface of the cameras 3, 4 and color filters 32, 42.
- the camera axes of the cameras 3 and 4 are preferably approximately at right angles to each other.
- the color filters 32, 42 allow only wavelengths that are in the range of the light of the respective illumination source 5, 6 of the respective axis. This is indicated for clarity by a corresponding hatching of the color filters 32, 42.
- the use of differently colored light-emitting diodes 5, 6 with the corresponding color filters 32, 42 on the two optical axes prevents light from the respective other light-emitting diode from producing an image disturbance in the non-associated camera, for example by stray light on the chip surface of the camera. As a result, the two colored light-emitting diodes 5, 6 remain switched on at the same time.
- FIGS. 6A and 6B show exemplary representations of illuminated optical fibers 7.
- the core of the fiber 7 is illuminated with light 71 as intended, for example through the use of the color filters 32, 42. Without appropriate filtering, the illumination of the fiber 7 could result in the occurrence of stray light 72, as shown in FIG. 6B.
- FIG. 7 shows an exemplary embodiment of a camera arrangement with illumination sources.
- the light-emitting diodes 5, 6 are necessary only for the cameras 3, 4 Times switched on.
- the light emitting diode 5 is turned on only during the period of recording an image with the camera 3, while the light emitting diode 6 is turned on only during a recording of an image with the camera 4. This avoids that the light of the light emitting diode 6 an image of the camera 3 and the light of the LED 5 interferes with an image of the camera 4 disturbing.
- power is also saved in the illustrated arrangement.
- illumination sources When using the control of the illumination sources can thus be dispensed with color filters and different colored light emitting diodes or lighting sources. Thus, it is also possible to use illumination sources with identical radiation bandwidth in the optical spectrum. This makes it possible that broadband radiation sources such as white LEDs can be used and additional costs can be avoided by the color filter and different colored LEDs.
- the suppression of disturbing reflected light of an unassigned illumination source is based on a time multiplex process. Because only the respectively associated with the active camera illumination source is turned on, can get from the second illumination source no stray light in this camera. When controlling the illumination sources, however, the readout technique of the cameras or camera chips used must be taken into account.
- English Rolling Shutter runs a so-called scan line, English Scan Line, which corresponds to a horizontal image line, temporally continuously in a vertical direction over the sensor surface or chip area.
- the pixels of the sensor surface lying on the scan line are read out and then reset or deleted.
- the remaining pixels, ie both above and below the scan line are photosensitive. This must be taken into account when lighting or controlling the lighting.
- the chip surface is never completely inactive with cameras with rolling shutter, the scattered light of the respective other light source could also be recorded with continuous illumination and leave a disturbing influence on the next read-out single image. Therefore, when controlling the lighting of rolling shutter cameras, the image exposure is performed only during a blanking period of the camera. The lighting is thus for the entire scanned image area of each selected camera. The image of the respective other camera is not influenced, since the image scanned by the other camera during this period is not transmitted to the camera interface 11 of the processor 1. According to the described principle, the images of the cameras 3, 4 are alternately forwarded to the processor 1. This results in the transmission of the image signals to an effective halving of the frame rate of the individual cameras 3, 4, because only every second image of a camera is transmitted. A frame rate in the generation of the image signals in the cameras 3, 4 may remain unaffected.
- FIG. 8 shows an exemplary signal time diagram for controls of the illumination sources.
- a signal VSYNC represents a synchronization signal for an image scan.
- the cameras At a high level of the signal VSYNC, the cameras have a sampling gap during which no scanning of the image takes place.
- the signals at the control outputs 210, 220 in FIG. 8 may correspond to IP1 and IP2.
- the signals IP1 and IP2 have a high level which is synchronous with the synchronization signal VSYNC, with only every other pulse of the signal VSYNC being mapped to the signals IP1 and IP2.
- the synchronization signal VSYNC is substantially the same for both cameras.
- a scanning of the image with the scan line takes place in the sample time interval following the respective illumination pulse. Since only every second scanned image is also transmitted to the processor 1, the illumination takes place with each only for the respective image for the respective camera.
- the luminous intensity of the illumination sources or light-emitting diodes must be greater than in the case of continuous activation, since in the period of the pulse of the signal VSYNC the entire light energy necessary for sufficient exposure should strike the sensor or the chip surface. Since it is possible with LEDs, with a corresponding pulse-pause ratio briefly reach a much higher brightness than nominal, such a control can be realized without significant additional effort. This is also called an override of the LED.
- the lighting control described could also be used independently for other illumination scenarios for camera lighting.
- a camera system could be used which has only one camera, which is connected to a processor with on-chip integrated camera interface.
- Such a camera system would also have the advantage that no external clock generation in a separate FPGA and no additional memory for the FPGA are required.
- a lighting control could also be dispensed with in this case.
- VSYNC synchronization signal
- IPl control signal
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Studio Devices (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006028693A DE102006028693A1 (de) | 2006-06-22 | 2006-06-22 | Videosystem für ein Spleißgerät und Verfahren zum Betreiben eines Videosystems für ein Spleißgerät |
| PCT/EP2007/005449 WO2007147588A1 (de) | 2006-06-22 | 2007-06-20 | Videosystem für ein spleissgerät und verfahren zum betreiben eines videosystems für ein spleissgerät |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2030058A1 true EP2030058A1 (de) | 2009-03-04 |
Family
ID=38535380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07764756A Withdrawn EP2030058A1 (de) | 2006-06-22 | 2007-06-20 | Videosystem für ein spleissgerät und verfahren zum betreiben eines videosystems für ein spleissgerät |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20090135305A1 (de) |
| EP (1) | EP2030058A1 (de) |
| DE (1) | DE102006028693A1 (de) |
| WO (1) | WO2007147588A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10425687B1 (en) | 2017-10-10 | 2019-09-24 | Facebook, Inc. | Systems and methods for determining television consumption behavior |
| JP6644231B1 (ja) * | 2019-04-26 | 2020-02-12 | Awl株式会社 | 画像分析装置、及び画像分析システム |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3500850B2 (ja) * | 1996-04-23 | 2004-02-23 | 住友電気工業株式会社 | リボン型光ファイバの突き合せ部を観察する方法及び観察装置 |
| JP3389595B2 (ja) * | 1997-06-26 | 2003-03-24 | 住友電気工業株式会社 | 光ファイバ観察装置および融着接続装置 |
| JPH11218464A (ja) * | 1998-02-02 | 1999-08-10 | Furukawa Electric Co Ltd:The | 光ファイバ観察用画像処理装置 |
| US7061522B1 (en) * | 1998-03-18 | 2006-06-13 | The Furukawa Electric Co., Ltd. | Optical fiber fusion-splicer |
| EP1055902A4 (de) * | 1998-12-14 | 2005-03-02 | Furukawa Electric Co Ltd | Bildverarbeitungssystem für die observation eines optischen fibers und vorrichtung für die fusionsverbindung optischer fiber |
| JP4531925B2 (ja) * | 2000-04-26 | 2010-08-25 | 古河電気工業株式会社 | 光ファイバ、光部品の観測装置 |
| JP3744812B2 (ja) * | 2001-04-26 | 2006-02-15 | 住友電気工業株式会社 | 定偏波光ファイバの融着接続方法 |
| US7012637B1 (en) * | 2001-07-27 | 2006-03-14 | Be Here Corporation | Capture structure for alignment of multi-camera capture systems |
| US20030081121A1 (en) * | 2001-10-30 | 2003-05-01 | Kirmuss Charles Bruno | Mobile digital video monitoring with pre-event recording |
| CA2386560A1 (en) * | 2002-05-15 | 2003-11-15 | Idelix Software Inc. | Controlling optical hardware and dynamic data viewing systems with detail-in-context viewing tools |
| US7777783B1 (en) * | 2007-03-23 | 2010-08-17 | Proximex Corporation | Multi-video navigation |
-
2006
- 2006-06-22 DE DE102006028693A patent/DE102006028693A1/de not_active Withdrawn
-
2007
- 2007-06-20 WO PCT/EP2007/005449 patent/WO2007147588A1/de not_active Ceased
- 2007-06-20 EP EP07764756A patent/EP2030058A1/de not_active Withdrawn
-
2008
- 2008-12-19 US US12/339,200 patent/US20090135305A1/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007147588A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102006028693A1 (de) | 2007-12-27 |
| US20090135305A1 (en) | 2009-05-28 |
| WO2007147588A1 (de) | 2007-12-27 |
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