WO2007107251A1 - Verfahren und vorrichtung zum optischen auslesen von informationen - Google Patents

Verfahren und vorrichtung zum optischen auslesen von informationen Download PDF

Info

Publication number
WO2007107251A1
WO2007107251A1 PCT/EP2007/002060 EP2007002060W WO2007107251A1 WO 2007107251 A1 WO2007107251 A1 WO 2007107251A1 EP 2007002060 W EP2007002060 W EP 2007002060W WO 2007107251 A1 WO2007107251 A1 WO 2007107251A1
Authority
WO
WIPO (PCT)
Prior art keywords
information carrier
fourier
hologram
read
photodetector
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.)
Ceased
Application number
PCT/EP2007/002060
Other languages
German (de)
English (en)
French (fr)
Inventor
Stephan Völkening
Torsten Hupe
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.)
Bayer Innovation GmbH
Original Assignee
Bayer Innovation GmbH
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
Priority to JP2009500732A priority Critical patent/JP2009530725A/ja
Priority to AT07723140T priority patent/ATE469416T1/de
Priority to EP07723140A priority patent/EP2002433B1/de
Priority to DK07723140.5T priority patent/DK2002433T3/da
Priority to AU2007229100A priority patent/AU2007229100B2/en
Priority to US12/293,616 priority patent/US8915436B2/en
Application filed by Bayer Innovation GmbH filed Critical Bayer Innovation GmbH
Priority to CA002646581A priority patent/CA2646581A1/en
Priority to DE502007003938T priority patent/DE502007003938D1/de
Publication of WO2007107251A1 publication Critical patent/WO2007107251A1/de
Priority to IL194084A priority patent/IL194084A/en
Anticipated expiration legal-status Critical
Priority to NO20084420A priority patent/NO20084420L/no
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/16—Processes or apparatus for producing holograms using Fourier transform
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
    • G06K19/10—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
    • G06K19/16—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards the marking being a hologram or diffraction grating
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
    • G11C13/04—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam
    • G11C13/042—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam using information stored in the form of interference pattern
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G03H1/2202—Reconstruction geometries or arrangements
    • G03H2001/2223—Particular relationship between light source, hologram and observer
    • G03H2001/2231—Reflection reconstruction
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
    • G03H1/30—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique discrete holograms only
    • G03H2001/306—Tiled identical sub-holograms

Definitions

  • the present invention relates to a novel information carrier on which information in the form of diffraction structures is stored.
  • the information carrier according to the invention can be read by manual passage through a read-out device.
  • the present invention further relates to a device with which an information carrier according to the invention can be read out.
  • Plastic cards as information carriers are omnipresent today. As a result of the increasing computer data processing, a person typically has a series of plastic cards with which they can authenticate themselves. Examples include company cards, health insurance cards, credit, EC and Payback cards.
  • ID-I format which is characterized by the standard ISO / IEC 7810 ("credit card format") .It has a handy size and can be stored in purses. There are many card readers that are designed for this format.
  • OCR optical Character Recognition
  • the aforementioned storage methods only allow the storage of a few bytes (OCR) to kilobytes (chip).
  • OCR optical Character Recognition
  • WO8808120 (A1) and EP0231351 (A1) optical memory cards are described in which data are photographically exposed in a silver halide film deposited on the plastic cards. The data can be written in with a laser and read out.
  • WO8808120 (A1) describes a device with which the film can be written and read out. The data is available digitally in the form of data points. The data points have a different reflectivity to the environment and can thus be read by means of a laser beam and a photodetector.
  • a disadvantage of the described card and the card reader is that the card must be positioned exactly with respect to readout beam and detector to read the data can.
  • the map In order to read the individual data points one after the other, the map must also be moved in relation to the reading beam and the detector so that the reading beam hits the data points exactly.
  • the data density on the card is limited to the degree of positioning accuracy in reading out. If the data points are denser than the positioning accuracy of the reading beam, the individual data points can no longer be detected.
  • barcode or magnetic stripe cards it is possible to pull the card through a card guide for reading. The data is read out when pulling through manually. A mechanical positioning of the reading head in relation to the card is not necessary.
  • the manual card guide is on the one hand the greater convenience for the user, since he does not have to give the card out of hand, an associated increased speed of the entire reading process and on the other hand lower manufacturing costs of the device, as can be dispensed with an expensive mechanical positioning , as well as a higher robustness of the device.
  • optical memory cards according to the invention can be read out during manual passage through a card guide, although the structures which represent the data in the storage medium are smaller than the positioning accuracy in manual pulling.
  • optical memory cards according to the invention have a higher storage capacity than the memory cards known from the prior art. This is achieved by information carriers, in particular optical memory cards, on which data are stored in the form of Fourier holograms. Such information carriers form a first subject of the present invention.
  • the information (data) to be read is present in the form of Fourier logograms on a flat information carrier, for example a plastic card.
  • the storage medium for the hologram all conventional materials known to the person skilled in the art can be considered, in which a flat surface can be produced.
  • these are polymers, metals, papers, textiles, lacquers, stoneware and the like, in which the holographic structures are introduced by embossing, etching, photolithography, granolithography, abrasion or cutting.
  • Composite materials are also conceivable which are formed by combining the abovementioned materials.
  • An example of this are polymer films on which a metal film is applied.
  • the holographic structures can also be introduced with light (silver halide film, photoaddressable polymer film, etc.).
  • a flat information carrier is understood to be an information carrier having a radius of curvature which is substantially larger than the information carrier itself.
  • a flat information carrier is, for example, a credit card that has been bent in the wallet so that it has a radius of curvature of 3 m while The map itself is only about 8 inches long and about 5 inches wide.
  • the storage medium for the hologram can be both part of the information carrier itself as well as only be firmly connected to the information carrier.
  • the holograms can be read out in reflection or transmission. They are preferably read in reflection.
  • a light-reflecting surface is required, to which the hologram is applied or into which the hologram is introduced.
  • the information carrier should preferably be smooth, that is, the roughness should be smaller than the holographic structures.
  • the roughness can be determined, for example, by means of a stylus method (measuring device: KLA Tencor Alpha Step 500, measuring method: MM-40001).
  • the holographically stored data are preferably present as a two-dimensional distribution of brightness values.
  • An example would be the Data Matrix Code specified in ISO / IEC 16022.
  • the spatial brightness distribution of the object in the Fourier hologram is encoded in the form of angles. This is illustrated schematically in FIG. 1: When the Fourier hologram (2) is irradiated with a collimated laser beam (7), the light beams are diffracted at different angles at the hologram.
  • the angles can be returned to location information (FIGS. 1 and 2): the beams diffracted at the same angle are focused by the Fourier lens (5) into one point. The diffracted at different angles beams are focused by the Fourier lens in different points.
  • the spots may be on a detector, e.g. a camera, are displayed and are thus processed electronically.
  • this effect can be used to read out information stored in the form of Fourier holograms on a flat information carrier, while the information carrier is displaced in relation to an incident laser beam, for example moved manually by a guide.
  • the hologram is only partially detected by the readout spot, the image is less bright and blurred than if the entire hologram is detected by the readout spot. From this it could easily be concluded that it is particularly favorable to design the readout spot larger than the hologram so that as many areas of the hologram as possible are captured by the readout spot during the readout process. This is not so. If the read spot is larger than the hologram, parts of the information carrier that do not have a hologram are always illuminated. As a result, generally less light rays are diffracted at the hologram, so that the brightness decreases. In addition, scattering effects due to irradiation of the information carrier outside the hologram lead to increased background noise on the detector. Surprisingly, it has been found that the imaging properties when irradiating the hologram are particularly good when the read spot is smaller than the hologram. More preferably, the readout spot is 0.9 to 0.1 times as large as the hologram.
  • Particularly good imaging properties are achieved when several holograms with the same content are placed directly in a larger hologram.
  • Particularly preferably, 2 to 9 holograms of the same content are placed directly against one another and thus form an enlarged hologram.
  • the geometry of the Fourier holograms is adapted to the profile of the readout spots.
  • Conventional lasers as the source of the readout beam produce a circular or elliptical readout spot, where the intensity decreases from the inside to the outside.
  • FIG. Fig. 4 (a) shows a Fourier hologram. This is quadrupled in Fig. 4 (b), with the four identical holograms arranged in the form of a rectangle. In Fig. 4 (c), the enlarged hologram is cut so that the hologram has the shape of the readout spot.
  • the individual holograms are provided in Fig. 4 with a black frame, but in reality does not occur.
  • the size of the holograms is preferably 0.1 to 5 mm in diameter.
  • Another object of the present invention is an apparatus for reading the optical memory cards according to the invention.
  • Such a device comprises a light source for a readout beam, a Fourier optics, a photodetector and a guide device, which aligns the information carrier during the movement during the read operation, in particular the manual passage through the device with respect to the readout beam and the photodetector.
  • the guide restricts the movement of the information carrier in two spatial directions, while the information carrier is moved in the third spatial direction.
  • the information carrier is for example moved manually through the guide and thereby illuminated with a light beam.
  • the light beam is diffracted at the Fourier hologram of the information carrier and the diffracted beams are imaged by means of a Fourier optics onto a detector, where the optical signal is transformed into an electronic signal.
  • the optical memory cards according to the invention can be read out in transmission and / or reflection.
  • FIG. It consists of two guide rails (10 and 11) between which the information carrier (1) is moved manually.
  • One of the guide rails (here 10) has a roller (12) which is mounted with a pressure spring (13) and presses the information carrier (1) against the other rail (here 11) during manual pulling.
  • the roll is slightly tilted, so that an information carrier is automatically pushed down while pulling.
  • the information carrier is pressed during manual passage both against a rail (here 11) and against the bottom of the guide. This limits two of the three possible spatial directions. In the third spatial direction, parallel to the guide rails 10 and 11, the information carrier is moved.
  • the bore (16) is arranged in the height of the hologram (2) on the information carrier (1).
  • a groove (15) milled, which prevents a hologram located on the information carrier is gradually scratched by repeated passage through the guide.
  • a detector (14) is inserted in the guide, which detects whether an information carrier is moved by the guide.
  • a forked light barrier can be used whose light beam is interrupted by the information carrier. The interruption of the light beam of the light barrier can be used as a trigger for the readout beam (3) and the detector (camera) (6). As soon as the light barrier is interrupted, the readout beam is switched on and the image on the camera is evaluated.
  • holograms can be read one after the other.
  • the holograms are then arranged on the information carrier at a height along a line (9) in the storage medium (17).
  • a further subject of the present invention is a method for data transmission, which comprises (a) storing the data in the form of at least one Fourier hologram on a flat information carrier, for example a plastic card, and (b) the information carrier by a device comprising a Fourier optics Photodetector and a guide device which aligns the information carrier during movement through the device with respect to the readout beam and the photodetector to move and read the stored data.
  • the movement of the information carrier by the device during the read operation by manual passage.
  • a further subject matter of the present invention is a system for data transmission comprising at least one flat information carrier, for example a plastic card which contains data stored in the form of at least one Fourier hologram, and at least one reading device comprising a Fourier optics, a photodetector and a guide device which stores the information carrier during movement during the read operation, in particular the manual passage through the device with respect to the readout beam and the photodetector aligns.
  • a flat information carrier for example a plastic card which contains data stored in the form of at least one Fourier hologram
  • at least one reading device comprising a Fourier optics, a photodetector and a guide device which stores the information carrier during movement during the read operation, in particular the manual passage through the device with respect to the readout beam and the photodetector aligns.
  • Such a system is useful for a variety of applications, such as authentication of persons or goods, or access control to buildings or premises.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Holo Graphy (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Credit Cards Or The Like (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
PCT/EP2007/002060 2006-03-22 2007-03-09 Verfahren und vorrichtung zum optischen auslesen von informationen Ceased WO2007107251A1 (de)

Priority Applications (10)

Application Number Priority Date Filing Date Title
CA002646581A CA2646581A1 (en) 2006-03-22 2007-03-09 Method and apparatus for optically reading information
AT07723140T ATE469416T1 (de) 2006-03-22 2007-03-09 Verfahren und system zum optischen auslesen von informationen
EP07723140A EP2002433B1 (de) 2006-03-22 2007-03-09 Verfahren und system zum optischen auslesen von informationen
DK07723140.5T DK2002433T3 (da) 2006-03-22 2007-03-09 Fremgangsmåde og system til optisk læsning af informationer
AU2007229100A AU2007229100B2 (en) 2006-03-22 2007-03-09 Method and apparatus for optically reading information
JP2009500732A JP2009530725A (ja) 2006-03-22 2007-03-09 情報を光学的に読む方法及び装置
DE502007003938T DE502007003938D1 (de) 2006-03-22 2007-03-09 Verfahren und system zum optischen auslesen von informationen
US12/293,616 US8915436B2 (en) 2006-03-22 2007-03-09 Method and apparatus for optically reading information
IL194084A IL194084A (en) 2006-03-22 2008-09-15 Method and Optical Reading Information System
NO20084420A NO20084420L (no) 2006-03-22 2008-10-21 Metode og apparat for optisk lesing av informasjon

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006012991A DE102006012991A1 (de) 2006-03-22 2006-03-22 Verfahren und Vorrichtung zum optischen Auslesen von Informationen
DE102006012991.1 2006-03-22

Publications (1)

Publication Number Publication Date
WO2007107251A1 true WO2007107251A1 (de) 2007-09-27

Family

ID=38180682

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/002060 Ceased WO2007107251A1 (de) 2006-03-22 2007-03-09 Verfahren und vorrichtung zum optischen auslesen von informationen

Country Status (15)

Country Link
US (2) US8915436B2 (enExample)
EP (1) EP2002433B1 (enExample)
JP (1) JP2009530725A (enExample)
AT (1) ATE469416T1 (enExample)
AU (1) AU2007229100B2 (enExample)
CA (1) CA2646581A1 (enExample)
DE (2) DE102006012991A1 (enExample)
DK (1) DK2002433T3 (enExample)
ES (1) ES2344811T3 (enExample)
IL (1) IL194084A (enExample)
NO (1) NO20084420L (enExample)
PT (1) PT2002433E (enExample)
RU (1) RU2446486C2 (enExample)
TW (1) TW200809653A (enExample)
WO (1) WO2007107251A1 (enExample)

Cited By (2)

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WO2012076137A3 (en) * 2010-12-08 2012-08-23 Roche Diagnostics Gmbh Consumable for measuring an analyte concentration of a body fluid sample, reader for reading an optical data storage of such a consumable and measuring system
DE102020210935B3 (de) 2020-08-31 2021-09-30 Tesa Scribos Gmbh Auslesevorrichtung zum Auslesen holographisch abgelegter Informationen, Verfahren zum Auslesen holographisch abgelegter Informationen

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DE102020210936A1 (de) 2020-08-31 2022-03-03 Scribos Gmbh Auslesevorrichtung zum Auslesen holographisch abgelegter Informationen, Verfahren zum Auslesen holographisch abgelegter Informationen, und Auslesesystem zum Auslesen von holographisch abgelegten Informationen.

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US8534557B2 (en) 2013-09-17
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PT2002433E (pt) 2010-07-21
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ES2344811T3 (es) 2010-09-07
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