WO2000033142A1 - Puce holographique et systeme optique utilise avec cette puce holographique - Google Patents

Puce holographique et systeme optique utilise avec cette puce holographique Download PDF

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Publication number
WO2000033142A1
WO2000033142A1 PCT/HU1999/000088 HU9900088W WO0033142A1 WO 2000033142 A1 WO2000033142 A1 WO 2000033142A1 HU 9900088 W HU9900088 W HU 9900088W WO 0033142 A1 WO0033142 A1 WO 0033142A1
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WO
WIPO (PCT)
Prior art keywords
holographic
layer
polarisation
recording
write
Prior art date
Application number
PCT/HU1999/000088
Other languages
English (en)
Inventor
Peter Toth
Péter RICHTER
EMőKE LőRINCZ
Pál KOPPA
Gábor SZARVAS
Ferenc ÚJHELYI
Original Assignee
Optilink Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Optilink Ab filed Critical Optilink Ab
Priority to EP99958412A priority Critical patent/EP1133717A1/fr
Priority to JP2000585720A priority patent/JP2002531880A/ja
Priority to CA002352232A priority patent/CA2352232A1/fr
Priority to AU15783/00A priority patent/AU1578300A/en
Publication of WO2000033142A1 publication Critical patent/WO2000033142A1/fr

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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
    • G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
    • G03H1/0252—Laminate comprising a hologram layer
    • G03H1/0256—Laminate comprising a hologram layer having specific functional layer
    • 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
    • G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
    • 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
    • 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
    • G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
    • G03H2001/026—Recording materials or recording processes
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2222/00—Light sources or light beam properties
    • G03H2222/31—Polarised light
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2250/00—Laminate comprising a hologram layer
    • G03H2250/38—Liquid crystal

Definitions

  • the invention relates to a microchip with an improved memory, and further to an optical system for use with the device.
  • the so-called smart cards i. e. cards with a built-in microchip have been known for some time.
  • the microchip in the card is capable of performing various "intelligent" functions, like banking functions or medical record functions.
  • the number of these smart card applications is growing steadily.
  • the invention is based on the recognition that the holographic layer need not have a large area or volume, but it needs a relatively rigid foundation to keep the layer optically plane for high-density data recording. It has been realised that the most appropriate place for a holographic layer is the built-in microchip of the smart card.
  • a semiconductor-based microelectronic device especially a microchip, which comprises a holographic storage layer on its optically accessible surface, preferably on its top surface.
  • the silicone wafer provides an ideally flat and rigid substrate for the hologram, instead of a more deformable plastic carrier.
  • the production of the holographic layer is easy to integrate into the chip manufacturing process, so the embedding of the chip and the hologram on the plastic substrate of the smart card is made in a single process step. and no extra process step is needed to put the holographic layer on the smart card.
  • a holographic recording method based on a rewritable holographic medium, especially a so-called SCP medium. Good signal-to-noise rations may be reached in this material using polarisation holography.
  • the invention also includes a card provided with the microelectronic device of the invention, especially a smart card containing a holographic chip.
  • a holographic chipcard This type of card will be called hereafter a holographic chipcard.
  • Such a card offers several advantages as compared with the traditional chip-based smart cards. Firstly, the data storage capacity is increased, so that the services of the card may be improved or extended. Beside, the card is essentially as rugged as a traditional card, because usual amounts of bending and deformation will not affect the optical properties of the hologram. Experience shows that with proper error correction algorithms the readout and write systems will tolerate the usual amount of scratches, to which the holographic layer is subjected. Also, due to its small size and the rigidness of the substrate, it is easier to provide the hologram with a harder, more scratch-resistant protective layer.
  • an optical read-write system for a holographic layer suitable for polarisation holographic recording comprising a read laser and a write laser, polarising optics, and a programmable display element, especially an SLM, for the purposes of modulating the object beam and the reference beam.
  • a single, two-dimensional programmable display element for the modulation of the reference and the object beams.
  • an optical read-write system for a holographic chip with a holographic layer for polarisation holographic recording
  • the optical system comprising a read and a write laser, polarising optics, and a programmable display element, especially an SLM, for the purposes of modulating the object beam and the reference beam, and a detector array for the readout of the information contained in the holograms of the holographic layer, where an image of the programmable display element is recorded in a polarisation recording medium as a single microhologram
  • the optical read-write system comprising positioning means for positioning the image of the programmable display element in different positions in the holographic recording layer.
  • beam scanning means for the purposes of recording and accessing differently located microholograms in the holographic layer.
  • the beam scanning means comprises a scanning mirror or a variable liquid crystal microprism.
  • a holographic recording layer structure especially a layer structure containing an SCP holographic layer, with a heating layer in the vicinity of the holographic layer, in order to heat the holographic layer to optimal operation temperature.
  • this layer stnicture comprises a homogeneously polished glass sheet, a directionally polished glass sheet, and a liquid crystal layer positioned between the two glass sheets, and further the holographic recording layer positioned between the liquid crystal layer and the homogeneously polished glass sheet, and flirther the directionally polished glass layer positioned on the other side of the liquid crystal layer.
  • the invention also includes a holographic chipcard system, comprising a card with an embedded microelectronic device according to a first aspect of the invention, and further comprising a holographic read-write optical system according to an other aspect of the invention.
  • Fig. la is a schematic top view of the holographic chip according to the invention.
  • Fig. lb is a schematic cross section of the holographic chip of Fig. la,
  • Fig. 2a is a schematic layout of the optical system according to the invention. for use with the holographic chip of the invention
  • Fig. 2b is an enlarged view of the SLM of the optical system of Fig. 2a
  • Fig. 3 is a schematic layout of an alternative embodiment of the optical system of the invention.
  • Fig. 4 is a schematic layout of a further alternative embodiment of the optical system of the invention
  • Fig. 5 is a block diagram of the system of the invention including a holographic chipcard and a read-write optical system for the holographic chipcard.
  • Fig. 6 is an exploded, perspective view of an inventive layer structure used in the holographic chip of the invention.
  • Fig. l a and lb illustrates the structure of the holographic chip of the invention.
  • the holographic chip is essentially a known semiconductor-based microchip, especially of the type used in so-called smart cards.
  • the microchip is provided with a holographic recording layer on its top.
  • the holographic recording layer contains several microholograms. where each microhologram is sized so that it can be read and written by an appropriate read-write optics (see also Figs 2,3 and 4) in a single, well defined static position. Normally, the microholograms are separated from each other physically, but they are all included in a single continuous holographic layer.
  • the holographic chip also comprises semiconductor electronic elements, which are all known by themselves, and they need not be discussed here. The electronic elements of the chip are connected to external devices through metallic electrical contacts, also known.
  • the holographic layer is positioned on the top surface of the microchip, in order to be optically accessible by a read-write optical system.
  • the holographic layer may be embedded in several other layers with different functions. In the embodiment shown in Fig. lb, the following other layers are also present on the microchip:
  • a heating layer This may be formed as a fine wire mesh or with a conducting resistor layer.
  • the purpose of this layer is an eventual moderate heating or more properly, tempering of the holographic layer. which performs best on a 30-40 °C operating temperature.
  • This reflective layer or mirror is necessary for the so-called reflection polarisation holography, which is used as the recording method or recording technique with the holographic optical recording system of the invention.
  • This recording method is described in detail in the International Publication No. WO 99/57719. which is herewith included by reference.
  • the mirror may not be necessary for other types of holographic layers and recording techniques.
  • the holographic layer itself is enclosed between the mirror and a protecting layer.
  • the protecting layer may also cover the edges of the other layers, as shown in Fig. lb.
  • the holographic layer in this embodiment is an approx. 100 nm thick SCP layer, which may be fabricated very cost-effectively by spin-coating.
  • the other layers are also prepared with known thin film or thick film technologies.
  • the polarisation interference pattern is recorded in a photoanisotropic material as a spatially modulated optical anisotropy.
  • the holographic layer is preferably a so-called Side Chain Polyester (SCP) material.
  • SCP Side Chain Polyester
  • the molecules of the recording medium e. g. a SCP compound, are aligned according to the polarisation of the incident light beam.
  • the writing process utilises blue or green light, and the readout of the hologram is effected with red light.
  • the recording process in e. g.
  • azobenzene SCP material is described in detail in the publication "Side-chain Liquid Crystalline Polyesters for Optical Information Storage", in: Polymers for Advanced Technologies, Vol. 7, pp. 768-776., which is herewith included by reference. Similar materials suitable for holographic recording are also known, and may be used advantageously.
  • the principles of polarisation holography are described in the publication “Polarisation holography. 1 : A new high-efficiency organic material with reversible photoinduced birefringence", Appl. Opt., Vol. 23, No. 23, 1 December 1984, pp. 4309-4312, and the publication "Polarisation holography. 2. Polarisation holographic gratings in photoanisotropic materials with and without intrinsic birefringence", Appl. Opt.. Vol. 23. No. 24, 15 December 1984, pp. 4588-4591.
  • the holographic layer is a liquid-crystal enhanced hologram, which will be described in detail with reference to Fig. 6.
  • the microchip is a chip used for smart card applications. Such a card will be denoted here as a holographic chipcard.
  • Fig. 2 shows an improved holographic read-write optical system according to the invention.
  • the read and write optics disclosed in the Patent Application HU P 98 01029 have been modified.
  • the read and write optics includes a writing laser (typically a green or blue laser) and a reading laser (typically a red laser), which are brought together on a common optical axis by a wavelength selective beam splitter.
  • the laser beams may be subjected to appropriate beam shaping, in order to achieve a uniform intensity distribution on the reference and the object.
  • a diffraction array generator may be used, which creates N x N separate light beams of the original Gaussian distribution of the laser beams.
  • each pixel of the SLM is illuminated by a separate laser beam.
  • These beams of the lasers are imaged on the pixels of an SLM (Spatial Light Modulator), which serves as an object and reference surface at the same time.
  • the central region of the Gaussian beam is imaged on the reference region of the SLM.
  • This novel arrangement allows the omission of a polarisation beam splitter and a compensator block, as compared with the optical system disclosed in HU P 98 01029. Since the compensator block is as large as a polarisation beam splitter, the novel arrangement of optical system of the invention may be made with two beam splitting elements only - typically glass or quartz cubes -, instead of four. Also, only one SLM is needed instead of two. Of course, the useful area of the SLM is reduced. but only a small fraction of the pixels is needed for the reference, and the rest may be utilised as the object, i. e. as the useful data.
  • a wavelength selective beam splitter and a polarising beam splitter has been united in a special central beam splitter shown in the centre of the optical system of Fig. 2a.
  • This special central beam splitter is provided with a polarisation selective surface as the diagonal splitting and reflecting surface, but in a central region of this diagonal surface there is a smaller region with a neutral beam splitting and reflecting surface.
  • the two different splitting surfaces of the central beam splitter may be manufactured with a known masking technique.
  • the central neutral splitting region is sized according to area reserved for the reference pixels on the SLM (See also Fig. 2b).
  • the green laser is used, in this embodiment on 532 nm wavelength.
  • the beam is expanded, and it is imaged on the total area of the SLM, upon reflection from the diagonal reflecting surface.
  • the central part of the SLM is defined as the reference surface, while the peripheral part is the object surface.
  • the reference area is relatively small, e. g. 10 x 10 pixels.
  • the object area is larger, e. g. 256x256 pixels.
  • the two areas are separated by a border, e. g. five pixels wide. All in all, one microhologram is capable of storing approx. 64 Kbits of data.
  • microholograms This may be multiplied by a factor of 10 to 30, using some sort of multiplexing, e. g. phase coding.
  • phase coding e. g. phase coding
  • the beams Upon reflection from the SLM, the beams are passing through the central beam splitter, and they are imaged on the hologram plate.
  • One complete image of the SLM corresponds to one microhologram.
  • the data stored in a microhologram are defined by the appropriate setting of the pixels in the object area, i. e. one pixel corresponds to one bit.
  • the pixels rotate the polariztion direction of the incoming beam, or reflect them unchanged. This rotation (or the absence thereof) represent a binary 1 or 0.
  • the reference pixels may be fixed in a uniform state, or they may be used for the purposes of the so-called phase-code multiplexing or phase encoding.
  • the wavelength of the read laser is preferably longer than the wavelength of the laser used for writing.
  • the light of the reading laser is collimated by appropriate optics, so it is imaged only on the central region of the central beam splitter.
  • the used wavelength in the embodiment shown is 635 nm. From there it is reflected towards the reference region of the SLM. After reflection on the reference region, the beam will function as the reference beam of the hologram readout.
  • This reference beam is imaged through the imaging optics, a special Fourier lens, on one microhologram in the hologram layer. The reflected hologram is deflected in a larger angle due to the wavelength dispersion, (i. e.
  • the hologram is detected by the peripheral parts of the detector array.
  • the beams of the reading laser is going straight through the central neutral beam splitting region are absorbed on a beam stop before the detector array, so the signal level of the detector is not impaired by the unmodulated central readout beam of the reading laser.
  • the optical system of Fig. 2 may be positioned by a known servo mechanism on the different microholograms in the holographic layer.
  • This solution may be feasible for a holographic layer with a large area.
  • the dimensions of the holographic layer are much smaller on a chip, and the distance between the microholograms is not very large. Therefore it is foreseen to provide the optical system of Fig. 2 with an optical positioning system instead of a mechanical one.
  • Fig. 3 shows a possible embodiment of the optical positioning system.
  • This system includes a scanning mirror arrangement between the polarising and detecting optics and the beam shaping optics of the read and write lasers (the red and green laser).
  • Fig. 4 shows a further embodiment of the optical system without a positioning mechanism.
  • the array includes a matrix of LC pixels, where each pixel functions as a miniature prism with a variable refractive angle.
  • a dev ice is described in the publication "Free-space optical interconnections with liquid-crystal microprism arrays" in Applied Optics, 10 May 1995, Vol. 34, No. 14, pp. 2571-2580.
  • the microprism array allows the tilting of the reference and object beams reflected from the SLM in different angles, so that all microholograms on the chip are reached from one central position of the optical system.
  • Fig. 5 illustrates the block diagram of a holographic chipcard system of the invention.
  • the holographic chip of the invention is integrated into a card, and thereby a holographic chipcard is created.
  • the information contained in the holographic chipcard is stored partly in the microchip itself, and partly in the hologram on the chip. It is foreseen that the microchip mostly stores the program of the specific application, for which the holographic chipcard is used, e. g. program for banking functions or medical functions. Larger amounts of data are stored in the hologram on the chip.
  • the data in the hologram and in the chip may be encoded with some sort of encryption, and the information necessary for the decryption are stored in the other storage medium.
  • this includes a combined optical and electronic read-write head for reading out the information from the hologram and the chip, respectively.
  • the combined head includes electric contacts, and the necessary optics.
  • the combined head, and within the head especially the beam scan control unit, the CCD detector, the SLM and the lasers are controlled by a CPU.
  • the CPU is in a bi-directional communication with external devices through an interface. Operational data and other information may be stored temporarily or permanently in a memory.
  • a user interface typically in the form of a display and a keyboard.
  • Fig. 6. shows a novel layer structure used for the holographic recording layer of the invention.
  • This layer structure is termed as LC-enhanced holographic layer. It is essentially a traditional LCD-structure, where the LC (liquid crystal) is enclosed between two glass sheets. In the usual LCD-structures, the surfaces of the two glass sheets are directionally polished, and the polarisation direction of the LC material aligns itself along the polishing direction. Usually, the two glass surfaces are polished perpendicularly to each other, so there is a spiral-like twist in the polarisation direction within the LC material. There are also some LC materials where polarisation direction across the whole layer is turned in one well-determined direction.
  • the holographic layer - which, in this case, is a layer suitable for polarisation holography - is inserted between one of the glass sheets and the LC material.
  • This glass is not directionally, but homogeneously polished. Therefor, it is not going to affect the polarisation direction of the layer below it.
  • the LC material will be now influenced by the holographic layer just adjacent to it, and the polarisation direction within the LC material - at least on its top surface - will be aligned to the polarisation direction of the holographic layer. This is illustrated in Fig. 6 with the area A and area B.
  • the polarisation direction of the holographic layer coincides with the polarisation direction of the bottom glass sheet, so in this area the incident light beam will not be modulated in the LC layer.
  • the directions of the polarisation is perpendicular to each other, an therefore the incident light will be strongly modulated.
  • the effect will be that the LC layer will enhance the polarisation effect within the combined stack of the holographic layer and LC layer, and a much better holographic diffraction efficiency may be achieved with the same or almost the same energy.
  • the LC layer is more stable, and therefore it will increase the lifetime or the storage layer. With other words, the LC material will enhance the favourable optical properties of the holographic storage layer.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Holo Graphy (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

L'invention concerne un dispositif micro-électronique à semiconducteur, en particulier une puce, dont la surface optiquement accessible, qui est de préférence sa surface supérieure, présente une couche mémoire holographique. Cette invention concerne également un système de lecture-écriture optique pour cette puce holographique, laquelle présente, à des fins d'enregistrement holographique par polarisation, une couche holographique. Ce système optique comporte un laser de lecture et d'écriture, un dispositif optique polarisant, et un élément d'affichage programmable, lesquels permettent de moduler le faisceau objet et le faisceau de référence, un groupement de détecteurs étant par ailleurs destiné à lire les informations contenues dans les hologrammes de ladite couche holographique. Une image du dispositif d'affichage programmable est en outre enregistrée sur un support d'enregistrement par polarisation, sous la forme d'un micro-hologramme. Le système de lecture-écriture optique comprend également des organes de balayage par faisceau permettant à la fois d'enregistrer des micro-hologrammes dispersés sur la couche holographique et d'accéder à ceux-ci. Le système optique de cette invention peut être utilisé avec une carte à puce renfermant ladite puce holographique.
PCT/HU1999/000088 1998-11-27 1999-11-26 Puce holographique et systeme optique utilise avec cette puce holographique WO2000033142A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP99958412A EP1133717A1 (fr) 1998-11-27 1999-11-26 Puce holographique et systeme optique utilise avec cette puce holographique
JP2000585720A JP2002531880A (ja) 1998-11-27 1999-11-26 ホログラフィックチップおよびホログラフィックチップのための光学系
CA002352232A CA2352232A1 (fr) 1998-11-27 1999-11-26 Puce holographique et systeme optique utilise avec cette puce holographique
AU15783/00A AU1578300A (en) 1998-11-27 1999-11-26 Holographic chip and optical system for the holographic chip

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU9802755A HUP9802755A3 (en) 1998-11-27 1998-11-27 Holographic chip and optical system for the holographic chip
HUP9802755 1998-11-27

Publications (1)

Publication Number Publication Date
WO2000033142A1 true WO2000033142A1 (fr) 2000-06-08

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PCT/HU1999/000088 WO2000033142A1 (fr) 1998-11-27 1999-11-26 Puce holographique et systeme optique utilise avec cette puce holographique

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EP (1) EP1133717A1 (fr)
JP (1) JP2002531880A (fr)
AU (1) AU1578300A (fr)
CA (1) CA2352232A1 (fr)
HU (1) HUP9802755A3 (fr)
WO (1) WO2000033142A1 (fr)

Cited By (7)

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Publication number Priority date Publication date Assignee Title
WO2002091371A2 (fr) * 2001-05-09 2002-11-14 Orga Kartensysteme Gmbh Procede de fabrication d'un support de donnees comportant une memoire holographique destinee au stockage rapide de donnees
WO2005034019A2 (fr) * 2003-10-01 2005-04-14 Ver-Tec Security Systems Limited Procedes et dispositifs de verification de donnees
DE102004053071A1 (de) * 2004-10-31 2006-05-11 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtungen zum Aufzeichnen beziehungsweise zum Auslesen eines kodierten Hologrammes
EP1843223A1 (fr) * 2005-01-27 2007-10-10 Fujitsu Limited Dispositif d'enregistrement d'hologramme
US7507504B2 (en) 2002-02-15 2009-03-24 University Of Massachusetts Optical storage system
US8146808B2 (en) 2005-12-19 2012-04-03 International Frontier Technology Laboratory, Inc. Card which can be authenticated by hologram chip
EP3127047A4 (fr) * 2014-04-04 2017-11-08 Visa International Service Association Dispositif de paiement avec élément de sécurité holographique

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WO1998002849A1 (fr) * 1996-07-15 1998-01-22 Austria Card Plastikkarten Und Ausweissysteme Gesellschaft M.B.H. Support de donnees presentant un module et un hologramme
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002091371A2 (fr) * 2001-05-09 2002-11-14 Orga Kartensysteme Gmbh Procede de fabrication d'un support de donnees comportant une memoire holographique destinee au stockage rapide de donnees
WO2002091371A3 (fr) * 2001-05-09 2003-10-23 Orga Kartensysteme Gmbh Procede de fabrication d'un support de donnees comportant une memoire holographique destinee au stockage rapide de donnees
US7507504B2 (en) 2002-02-15 2009-03-24 University Of Massachusetts Optical storage system
WO2005034019A2 (fr) * 2003-10-01 2005-04-14 Ver-Tec Security Systems Limited Procedes et dispositifs de verification de donnees
WO2005034019A3 (fr) * 2003-10-01 2005-10-06 Ver Tec Security Systems Ltd Procedes et dispositifs de verification de donnees
DE102004053071B4 (de) * 2004-10-31 2008-01-10 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtungen zum Aufzeichnen beziehungsweise zum Auslesen eines kodierten Hologrammes
DE102004053071A1 (de) * 2004-10-31 2006-05-11 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtungen zum Aufzeichnen beziehungsweise zum Auslesen eines kodierten Hologrammes
EP1843223A1 (fr) * 2005-01-27 2007-10-10 Fujitsu Limited Dispositif d'enregistrement d'hologramme
EP1843223A4 (fr) * 2005-01-27 2009-07-29 Fujitsu Ltd Dispositif d'enregistrement d'hologramme
US8146808B2 (en) 2005-12-19 2012-04-03 International Frontier Technology Laboratory, Inc. Card which can be authenticated by hologram chip
US8397987B2 (en) 2005-12-19 2013-03-19 International Frontier Technology Laboratory, Inc. Card which can be authenticated by hologram chip
EP3127047A4 (fr) * 2014-04-04 2017-11-08 Visa International Service Association Dispositif de paiement avec élément de sécurité holographique
US9916580B2 (en) 2014-04-04 2018-03-13 Visa International Service Association Payment device with holographic security element

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CA2352232A1 (fr) 2000-06-08
EP1133717A1 (fr) 2001-09-19
AU1578300A (en) 2000-06-19
JP2002531880A (ja) 2002-09-24
HUP9802755A3 (en) 2002-05-28
HU9802755D0 (en) 1999-01-28
HUP9802755A2 (hu) 2000-06-28

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