EP0215895A1 - Data registration medium - Google Patents

Data registration medium

Info

Publication number
EP0215895A1
EP0215895A1 EP86902079A EP86902079A EP0215895A1 EP 0215895 A1 EP0215895 A1 EP 0215895A1 EP 86902079 A EP86902079 A EP 86902079A EP 86902079 A EP86902079 A EP 86902079A EP 0215895 A1 EP0215895 A1 EP 0215895A1
Authority
EP
European Patent Office
Prior art keywords
card
data
data carrier
area
reading
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Withdrawn
Application number
EP86902079A
Other languages
German (de)
French (fr)
Inventor
Hans Gösta MALMKVIST
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson 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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of EP0215895A1 publication Critical patent/EP0215895A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06K19/04—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the shape
    • G06K19/041—Constructional details
    • G06K19/042—Constructional details the record carrier having a form factor of a credit card and including a small sized disc, e.g. a CD or DVD
    • G06K19/044—Constructional details the record carrier having a form factor of a credit card and including a small sized disc, e.g. a CD or DVD comprising galvanic contacts for contacting an integrated circuit chip thereon
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06K19/14—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 sensed by radiation
    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/0033—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with cards or other card-like flat carriers, e.g. flat sheets of optical film
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material

Definitions

  • the invention relates to a data registration medium in the form of a rectangular card, preferably for optical data storage.
  • a generally used data storage medium has the form of a plastic card with the standardised format 53.975 x 85.598 mm.
  • Data storage on cards of this kind known up to now has taken place with the aid of data-carrying strips, usually parallel to the longitudinal direction of the card.
  • These strips may be of magnetic material, as with the generally prevailing charge, credit and bank cards. They may also comprise an optically active layer where data is stored in the form of portions which are either reflecting or non-reflecting. Reading is performed by a linear relative movement in the longitudinal direction of the card between it and a magnetic or optical reading head.
  • CD Compact Disk
  • the data carrier in this system is a disk where the signal is stored in the form of a spiral track comprising a series of depressions on the surface of the disc. The bottom of the depressions as well as intermediate surfaces are covered with a reflecting material. Reading is performed by a laser beam which is reflected by the surface of the disk and by the bottoms of the depressions. The laser beam follows the track with the aid of a simple servo mechanism which can shift the beam a minor distance radially. Moving the beam from the start of the track to its end takes place with the aid of a mechanism similar to the tone arm on an ordinary record player.
  • the storage medium used in the CD system is usually programmed with digitally recorded music, and the most usual technique for producing CD records is injection moulding transparent plastics in a mould where one defining surface contains the information as a surface relief. During the moulding process this is impressed on the disk surface, which is subsequently given a thin metallic coating. Reading is done through the transparent disk. Due to the interference phenomenon the reflected light will have different intensities depending on from what part of the relief it comes.
  • holes can be burnt into the storage medium with the aid of focussed light from the laser, which is then driven at high power. A lesser light power not affecting the storage medium is used for reading the information.
  • the disks used for optical storage of sound (the CD disks) and video signals and as data carriers are not accepted as an easily portable data medium. Furthermore, they are intended for very large amount of data, and the reading and writing equipment must be provided with mechanical means for radially scanning the disk. It has been found that for most purposes it is satisfactory with an information quantity of ⁇ 2 Mbytes.
  • a preferably rectangular card provided with an area intended for optical registration of data in the form of markings modifying the properties of the reflected light from a light beam incident on the area.
  • the invention is distinguished by this area being formed as a annular ring, width of which is much less than its diameter.
  • Figures 1 and 2 each illustrate an embodiment of a data carrier
  • Figure 3 is a cross section through a known carrier
  • Figure 4 schematically illustrates a reading and/or writing means.
  • the data carrier illustrated in Figure 1 consists of a plastic card, suitably of the ISO standard format of approximately 54 x 86 mm.
  • a narrow annular information-carrying area 2 This area accommodates such as a spiral groove for example of the kind described in the above-mentioned article in "Philips Technical Review", but is intended for writing.
  • the groove is schematically illustrated in Figure 3 in sectioned perspective, and comprises a transparent base material 5 that has been provided with a relief pattern with impressions 6.
  • the entire relief pattern is covered by a thin layer 7 in which information may be stored witht the aid of a sufficiently powerful laser beam, which is incident on the layer 7 through the transparent layer.
  • the laser lig t is incident on the layer 7 there is a change in the optical properties of this layer, e.g. by a hole being burnt into it. Reading is performed with the sam laser but then at a power which is so low that the properties of the layer ar not affected. The reflected light is detected and gives rise to a signal varyin as the state of the surface and representing the stored information. A junctio between an illuminated and non-illuminated surface during writing, and vice versa, can be interpreted as a binary One while unchanged surface condition denotes Zero.
  • the groove suitably has the dimension standard for digital CD records, namely a
  • a hole 3 is disposed at the centre of the annular area 2.
  • This hole of a diameter as 15 mm fits the rotating spindle of a drive means taking the information groove past a fixed read and/or write station, as illustrated in Figure 4.
  • the groove 2 and hole 3 have their centres at the centre of gravity of the card. It is of course possible to place the groove displaced from this position, as is illustrated in Figure 2.
  • the card is not provided with any centering hole and is intended to coact with a rotating drive means equiped with a holder retaining the card such that the centre of the annular portion .2 coincides with the centre of rotation.
  • FIG. 4 It is schematically illustrated in Figure 4 how a data carrier in accordance with the invention coacts with a reading and writing unit.
  • the card 1 is placed on a spindle 10 fitting the hole 3 in the card.
  • the spindle is driven by a motor 11 controlled by a processor unit 12.
  • the light for writing and reading is generated by a laser 13 with associated optics, and passes a semitransparent mirror 14, or alternatively a polarisation prisma, and further an objective unit 15, which refracts the pencil of rays to a light spot somewhat greater than the width of the depressions.
  • the objective unit contains means for adjusting the focus and also shifting the light beam transverse the grooves. Such means are known per se, and are described, e.g. in the "Philips Technical Review" article mentioned above.
  • the adjusting means of the objective unit are controlled by the servo unit 21 for focussing and by the unit 22 for adjusting the beam radially as well as tracking the groove from start to finish.
  • the light reflected from the card surface is guided by the mirror 14 to a detector unit 16, where the light beam is conventionally caused to be incident on a plurality of photosensors, the output signals of which, after certain processing, give three signals.
  • the first is a digital signal 18 representing the stored information.
  • the second is a voltage signal 19 for keeping the beam o track in the groove and which controls the position servo 22.
  • the third is focussing signal used to adjust the laser beam focus so that the light spot i always positioned on the card surface, irrespective of any warping, and i controls the focussing servo 21.
  • the position signal is fed to the processor 12, which after further signa processing controls the drive motor 11 and also feeds a data signal to the outpu 23.
  • the fu ⁇ tion of the reading and writing unit may be controlled from an inpu 24 on the processor 12.
  • a writing signal is fed to the input 24. Eac time an information bit is to be burnt the power of the laser 13 is increased The latter has low power between the information bits and is then utilised fo tracking the groove. During the reading process the laser is operated at lo power the whole time.
  • the invention is not restricted to the described embodiments, and may b varied in a large number of ways within the scope of the inventive concept. Th data registration does not need to take place in the way exemplified in Figur 3. In most applications it is indeed desirable that the card may be supplied wit data during use, but in certain cases it may be supplied with permanen information, e.g. in the way used in the production of CD records.
  • a storage medium of this kind may be manufacture empty of information or already partly programmed. To obtain easy trackin such media are provided with fixed grooves in an extra layer or directly in th substrate as described above. Over this the storage medium is deposited as thin layer. Writing is done as described above with the aid of a laser, which ma be the same as is used for reading but driven at a substantially increased powe so that the desired changes arise in the layer. It is also possible to provide a data registration medium in accordance with the invention with an area of a material which may be written on or erased optically. Examples of this are reversible phase conversions and magnetoptic storage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Hardware Design (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

Un support d'enregistrement de données pour le stockage optique de données comprend une carte rectangulaire (1), de préférence du même type qu'une carte de crédit. La zone où les données sont stockées est une partie annulaire (2) dont la largeur (d) est beaucoup plus petite que le diamètre.A data recording medium for optical data storage comprises a rectangular card (1), preferably of the same type as a credit card. The area where the data is stored is an annular part (2) whose width (d) is much smaller than the diameter.

Description

DATA REGISTRATION MEDIUM
TECHNICAL HELD
The invention relates to a data registration medium in the form of a rectangular card, preferably for optical data storage.
BACKGROUND ART
A generally used data storage medium has the form of a plastic card with the standardised format 53.975 x 85.598 mm. Data storage on cards of this kind known up to now has taken place with the aid of data-carrying strips, usually parallel to the longitudinal direction of the card. These strips may be of magnetic material, as with the generally prevailing charge, credit and bank cards. They may also comprise an optically active layer where data is stored in the form of portions which are either reflecting or non-reflecting. Reading is performed by a linear relative movement in the longitudinal direction of the card between it and a magnetic or optical reading head.
It is also known to store information optically on disks. Examples of such data storage systems are the so-called Compact Disk (CD) systems described in "Philips Technical Review", Vol 40, 1982, No 6, pp 151-155. The data carrier in this system is a disk where the signal is stored in the form of a spiral track comprising a series of depressions on the surface of the disc. The bottom of the depressions as well as intermediate surfaces are covered with a reflecting material. Reading is performed by a laser beam which is reflected by the surface of the disk and by the bottoms of the depressions. The laser beam follows the track with the aid of a simple servo mechanism which can shift the beam a minor distance radially. Moving the beam from the start of the track to its end takes place with the aid of a mechanism similar to the tone arm on an ordinary record player.
Since the laser unit used can project light on to a very small surface (in the order of magnitude l tt-m) there is enabled a very great packing densitity. The storage medium used in the CD system is usually programmed with digitally recorded music, and the most usual technique for producing CD records is injection moulding transparent plastics in a mould where one defining surface contains the information as a surface relief. During the moulding process this is impressed on the disk surface, which is subsequently given a thin metallic coating. Reading is done through the transparent disk. Due to the interference phenomenon the reflected light will have different intensities depending on from what part of the relief it comes.
It is also known to make a storage medium of generally the same kind writable.
In such a case holes can be burnt into the storage medium with the aid of focussed light from the laser, which is then driven at high power. A lesser light power not affecting the storage medium is used for reading the information.
The same technique is most often used in manufacturing the storage medium as in the case above with permanent information, for providing fixed grooves that may be utilised for positioning and focussing the light spot. A thin layer is deposited over these grooves and the holes are burnt into it. Examples of this and further methods of optical data storage are to be found in "Vaccum Science and Technology", Vol 18, No 1, January/February 1981.
DISCLOSURE OF INVENTION
In many connections there is the need of a small, easily portable data medium containing a large amount of data. Examples of this are personal illness case histories, identity cards authorising the owner access to premises, data bases etc. A requirement is that the associated reader and, in the case where change in the information content shall be possible, the writing equipment shall be simple and cheap. It has bee found that a card of the standardised credit card format is ideal as a data carrier in respect of its format. With the strip-like data carrying areas of optical or magnetic type used for the data carrying cards described above, the reading means used for them will be complicated, particularly if the information is tightly packed.
Due to their round shape the disks used for optical storage of sound (the CD disks) and video signals and as data carriers are not accepted as an easily portable data medium. Furthermore, they are intended for very large amount of data, and the reading and writing equipment must be provided with mechanical means for radially scanning the disk. It has been been found that for most purposes it is satisfactory with an information quantity of < 2 Mbytes. In accordance witht the invention, it is possible in such case to use a preferably rectangular card provided with an area intended for optical registration of data in the form of markings modifying the properties of the reflected light from a light beam incident on the area. The invention is distinguished by this area being formed as a annular ring, width of which is much less than its diameter. With the optical storage technique now available, about 2 Mbytes of information may be stored using a ring width of about 0.3 mm and a diameter of about 50 mm on the approximately 150 tracks for which there is room on this width.
BRIEF DESCRIPTION OF DRAWING
The invention will now be described in detail in connection with the appended Figures, where Figures 1 and 2 each illustrate an embodiment of a data carrier, Figure 3 is a cross section through a known carrier and Figure 4 schematically illustrates a reading and/or writing means.
BEST MODE FOR CARRYING OUT .THE INVENTION
The data carrier illustrated in Figure 1 consists of a plastic card, suitably of the ISO standard format of approximately 54 x 86 mm. In the card surface there is a narrow annular information-carrying area 2. This area accommodates such as a spiral groove for example of the kind described in the above-mentioned article in "Philips Technical Review", but is intended for writing. The groove is schematically illustrated in Figure 3 in sectioned perspective, and comprises a transparent base material 5 that has been provided with a relief pattern with impressions 6. The entire relief pattern is covered by a thin layer 7 in which information may be stored witht the aid of a sufficiently powerful laser beam, which is incident on the layer 7 through the transparent layer. Where the laser lig t is incident on the layer 7 there is a change in the optical properties of this layer, e.g. by a hole being burnt into it. Reading is performed with the sam laser but then at a power which is so low that the properties of the layer ar not affected. The reflected light is detected and gives rise to a signal varyin as the state of the surface and representing the stored information. A junctio between an illuminated and non-illuminated surface during writing, and vice versa, can be interpreted as a binary One while unchanged surface condition denotes Zero.
The groove suitably has the dimension standard for digital CD records, namely a
2 groove pitch of 1.6^ m. With an information bit area of 1-2 it mm a data quantity of about 2 Mbytes may be stored on the approximately 150 grooves accommodated on a ring width of 0.3 mm.
In the card of Figure 1 a hole 3 is disposed at the centre of the annular area 2. This hole of a diameter as 15 mm fits the rotating spindle of a drive means taking the information groove past a fixed read and/or write station, as illustrated in Figure 4. The groove 2 and hole 3 have their centres at the centre of gravity of the card. It is of course possible to place the groove displaced from this position, as is illustrated in Figure 2. In this embodiment the card is not provided with any centering hole and is intended to coact with a rotating drive means equiped with a holder retaining the card such that the centre of the annular portion .2 coincides with the centre of rotation.
It is schematically illustrated in Figure 4 how a data carrier in accordance with the invention coacts with a reading and writing unit. The card 1 is placed on a spindle 10 fitting the hole 3 in the card. The spindle is driven by a motor 11 controlled by a processor unit 12. The light for writing and reading is generated by a laser 13 with associated optics, and passes a semitransparent mirror 14, or alternatively a polarisation prisma, and further an objective unit 15, which refracts the pencil of rays to a light spot somewhat greater than the width of the depressions. The objective unit contains means for adjusting the focus and also shifting the light beam transverse the grooves. Such means are known per se, and are described, e.g. in the "Philips Technical Review" article mentioned above. The adjusting means of the objective unit are controlled by the servo unit 21 for focussing and by the unit 22 for adjusting the beam radially as well as tracking the groove from start to finish.
The light reflected from the card surface is guided by the mirror 14 to a detector unit 16, where the light beam is conventionally caused to be incident on a plurality of photosensors, the output signals of which, after certain processing, give three signals. The first is a digital signal 18 representing the stored information. The second is a voltage signal 19 for keeping the beam o track in the groove and which controls the position servo 22. The third is focussing signal used to adjust the laser beam focus so that the light spot i always positioned on the card surface, irrespective of any warping, and i controls the focussing servo 21.
The position signal is fed to the processor 12, which after further signa processing controls the drive motor 11 and also feeds a data signal to the outpu 23. The fuπtion of the reading and writing unit may be controlled from an inpu 24 on the processor 12. For writing, a writing signal is fed to the input 24. Eac time an information bit is to be burnt the power of the laser 13 is increased The latter has low power between the information bits and is then utilised fo tracking the groove. During the reading process the laser is operated at lo power the whole time.
The invention is not restricted to the described embodiments, and may b varied in a large number of ways within the scope of the inventive concept. Th data registration does not need to take place in the way exemplified in Figur 3. In most applications it is indeed desirable that the card may be supplied wit data during use, but in certain cases it may be supplied with permanen information, e.g. in the way used in the production of CD records.
Furthermore, a large number of other methods are known which enable writin information optically with great density. Some examples of such known method which may be applied in connection with the invention use ablation (e.g. burnin holes), change of shape (bubbles), phase change (recrystallisation), structur change (surface pattern), Photochromies (colour change) and interference (th two wavelength method). A storage medium of this kind may be manufacture empty of information or already partly programmed. To obtain easy trackin such media are provided with fixed grooves in an extra layer or directly in th substrate as described above. Over this the storage medium is deposited as thin layer. Writing is done as described above with the aid of a laser, which ma be the same as is used for reading but driven at a substantially increased powe so that the desired changes arise in the layer. It is also possible to provide a data registration medium in accordance with the invention with an area of a material which may be written on or erased optically. Examples of this are reversible phase conversions and magnetoptic storage.
It is also possible to apply several annular areas 2 concentrically. These different areas may then contain different kinds of information and be read in reading units having several radially displaceable reading heads or having separate readers for each area.

Claims

1. Data carrier having the shape of a preferably rectangular card (1) provide with a circular area for packed optical recording of data in the form o markings modyfying the properties of the light from a light beam incident o the area in a known manner and where the reading and/or the recording i adapted to take place during the rotation of the card by means of at least on optical transducer head known per se and including a track holding mechanism for adjusting the beam position radially, characterized in that said annual are is shaped as at least one annular ring (2) the width (d) of which is less than the deflection range of said track holding mechanism.
2. Data carrier as claimed in claim 2, characterized in that the width of the annular area (2) is less than 2 mm.
3. Data carrier as claimed in claim 3, characterized in that the width of th annular area (2) is at most 0.3 mm.
4. Data carrier as claimed in claim 1, characterized in that the centre of th annular area is at the centre of gravity of the card (1).
5. Data carrier as claimed in claim 1, characterized in that the annular are (2) is unsymmetrically placed on the card (1).
6. Data carrier as claimed in claim 1, characterized by a hole at the centre o the annular area, and suited to a rotating spindle (10) on a reading and/o writing means intended for use in coaction with the card.
EP86902079A 1985-03-19 1986-03-19 Data registration medium Withdrawn EP0215895A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8501342 1985-03-19
SE8501342A SE447313B (en) 1985-03-19 1985-03-19 COMPUTERS IN THE FORM OF A BUSINESS RECTANGULATED CARD WITH A CIRCULATED AREA FOR OPTICAL RECORDING OF DATA

Publications (1)

Publication Number Publication Date
EP0215895A1 true EP0215895A1 (en) 1987-04-01

Family

ID=20359556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86902079A Withdrawn EP0215895A1 (en) 1985-03-19 1986-03-19 Data registration medium

Country Status (4)

Country Link
EP (1) EP0215895A1 (en)
JP (1) JPS62502298A (en)
SE (1) SE447313B (en)
WO (1) WO1986005620A1 (en)

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NL8503410A (en) * 1985-12-11 1987-07-01 Philips Nv DEVICE FOR TRANSFERRING INFORMATION BETWEEN AN ELECTRONIC MEMORY CARD AND A DATA PROCESSING UNIT.
US4800551A (en) * 1987-05-15 1989-01-24 Polaroid Corporation Method and apparatus for feeding card
US4831244A (en) * 1987-10-01 1989-05-16 Polaroid Corporation Optical record cards
US5045676A (en) * 1987-12-08 1991-09-03 Kime Milford B Optical media having interlaced data rings
DE68922435T2 (en) * 1988-05-25 1995-10-05 Canon Kk Device for recording and / or reproducing information.
US5307338A (en) * 1988-05-25 1994-04-26 Canon Kabushiki Kaisha Apparatus for recording and/or reproducing information
US4996681A (en) * 1989-04-24 1991-02-26 Polaroid Corporation Integral card for protectively enclosing an optical disk and a visual information bearing area
JP2804130B2 (en) * 1989-12-06 1998-09-24 株式会社日立製作所 Information processing device
FR2668277A1 (en) * 1990-10-23 1992-04-24 Kiota Int Apparatus for recording/reading a magnetogram formed on a support in the form of a card
DE19702245A1 (en) * 1997-01-23 1998-07-30 Bosch Gmbh Robert Disc-shaped, optical storage medium and reading device
FR2788160B1 (en) * 1998-12-31 2002-04-19 Joel Robin OPTICAL DISC CARD AND ADAPTER FOR READING OR ENGRAVING ON A READER OR RECORDER
DE29914038U1 (en) * 1999-08-11 1999-11-18 Ahrens Hans Joachim Magnetic card
FR2799291A1 (en) * 1999-09-30 2001-04-06 Arbre Vert L Multi-media data support business card comprises CD-ROM in rectangular format with re-writable recording surface
DE10013287A1 (en) 2000-03-17 2001-09-20 Fuji Magnetics Gmbh Optical business card with optical memory device as circular disc, includes device for fixing both elements in mutually rotated positions when placed flat on one another
DE10052747A1 (en) * 2000-10-25 2002-05-16 Iq Data Gmbh Credit card sized data carrier with both CD or DVD function and smart or authentication card functions in which the optical storage data area is protected by raised beads on its inner and outer circumferences to prevent scratching
FR2820915A1 (en) * 2001-02-09 2002-08-16 Interactive Avenue METHOD FOR SECURING A COMMERCIAL TRANSACTION USING A MEMORY CARD
DE10213273B4 (en) * 2002-03-25 2005-12-29 Steag Hamatech Ag Production of DVD cards and other discs with non-round shapes

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US3409760A (en) * 1966-12-14 1968-11-05 Monarch Marking Systems Inc Machine readable merchandise tag
NL7902363A (en) * 1979-03-27 1980-09-30 Philips Nv RECORD CARRIER WITH AN OPTICALLY READABLE INFORMASTRUCTURE.
JPS61190721A (en) * 1985-02-19 1986-08-25 Comput Services Corp Optical memory card

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Title
See references of WO8605620A1 *

Also Published As

Publication number Publication date
WO1986005620A1 (en) 1986-09-25
SE8501342L (en) 1986-09-20
SE447313B (en) 1986-11-03
SE8501342D0 (en) 1985-03-19
JPS62502298A (en) 1987-09-03

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