WO2002043057A2 - Dispositif d'enregistrement et de lecture optique de donnees - Google Patents

Dispositif d'enregistrement et de lecture optique de donnees Download PDF

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Publication number
WO2002043057A2
WO2002043057A2 PCT/DE2001/004428 DE0104428W WO0243057A2 WO 2002043057 A2 WO2002043057 A2 WO 2002043057A2 DE 0104428 W DE0104428 W DE 0104428W WO 0243057 A2 WO0243057 A2 WO 0243057A2
Authority
WO
WIPO (PCT)
Prior art keywords
laser beam
data
deflection unit
deflection
spherical surface
Prior art date
Application number
PCT/DE2001/004428
Other languages
German (de)
English (en)
Other versions
WO2002043057A3 (fr
Inventor
Guido Sieber
Original Assignee
Fujitsu Siemens Computers 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
Application filed by Fujitsu Siemens Computers Gmbh filed Critical Fujitsu Siemens Computers Gmbh
Publication of WO2002043057A2 publication Critical patent/WO2002043057A2/fr
Publication of WO2002043057A3 publication Critical patent/WO2002043057A3/fr

Links

Classifications

    • 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
    • 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
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08547—Arrangements for positioning the light beam only without moving the head, e.g. using static electro-optical elements
    • 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
    • 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
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
    • G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers

Definitions

  • the invention relates to a device for optically recording and / or reproducing data, comprising a data carrier which has a concave spherical surface (11) on the inside with an optically structurable reflection layer and an optical one
  • Such a device is e.g. EP 0 977193 A has also disclosed a recording device in which a laser beam can be pivoted by a deflection unit onto a concave spherical surface of a data carrier, the data carrier being rotatable relative to the optical device, so that the storage data are sequentially opened in concentric tracks the disk are written.
  • This requires a precise rotary drive, the axis of which must be exactly aligned with the central axis of the deflection unit and the center of the data carrier.
  • the present invention has for its object to improve a device for optical recording and playback of data in such a way that the scanning times are significantly reduced and thus the performance of such devices over a long period of time is significantly greater than in conventional systems.
  • the two-dimensional deflection unit means that there is no need for any other kinematic device. In particular, there is no wear-and-tear rotary drive with its problematic concentricity properties.
  • Deflection unit can have an electromagnetically actuated deflection mirror of very low mass, which can be adjusted very quickly, without disturbing the sensitive optics by vibrations.
  • the stationary assignment of the data carrier to the deflection unit makes it possible to adjust the two parts precisely to one another without any particular problems
  • the dome-shaped surface no longer needs to be divided into tracks to be described or scanned sequentially. Rather, the laser beam can be directed completely arbitrarily in the shortest possible time to any pixel-like memory locations of the reflection layer, as a result of which the writing and reading speed can be increased considerably.
  • the reflection layer can additionally be provided with markings distributed over the surface for precise adjustment of the laser beam.
  • the reflected optical signals can be directed precisely at a receiving diode, which converts them into electrical signals.
  • the laser beam can be constantly readjusted using the position markings.
  • the multiple coating according to claim 5 enables a corresponding multiplication of the storage capacity.
  • the figure shown shows a laser light source 1, a deflection unit 2, a data carrier 3 with a concave spherical surface facing the deflection unit 2 in the manner of a concave mirror.
  • At least one optically structurable polymeric reflective layer 4 is vapor-deposited on this surface, the molecular chains of which change their reflective properties under the influence of light.
  • a laser beam generated by the laser light source can be aligned by means of the deflection unit 2 in two deflection directions x and y to any storage locations of the reflection layer which it strikes perpendicularly. The signals reflected there are returned in the same way via the deflection unit in the direction of the laser light source.
  • the deflection unit takes place via an electromagnetically adjustable mirror.
  • the laser beam is deflected by means of a quartz or by using the Kerr effect.
  • the use of all nonlinear-optical effects which lead to a deflection or deflection of a laser beam is suitable for the deflection unit.
  • degenerate four-wave mixing is possible.
  • this is not the subject of the invention, which is why additional explanations are dispensed with and reference is made to the book A non Yariv: Quantum Electronics, publisher John Wiley & Sons, 3rd edition 1988 with regard to further design options for beam deflection.
  • the invention is not limited to one of the options mentioned, but closes other suitable devices for deflecting the laser beam.
  • An optical switch ⁇ in the form of an obliquely positioned semi-transparent mirror directs the reflected light to a beam splitter 7 from which it is guided to a position detector 8 and a data detector 9, in which the received optical signals are converted into electrical data signals.
  • the reflection layer can be changed either once or several times.
  • the device can be designed as a writing or reading device.
  • the device is designed as a combined read / write device.

Abstract

L'invention concerne un dispositif pourvu d'un support de données (3), qui présente sur une face intérieure une surface sphérique concave recouverte d'une couche réflectrice (4) à structuration optique, et d'un système optique, qui comporte une source (1) de faisceau laser et une unité de déflexion (2), agencée au centre de la surface sphérique, pour le faisceau laser (5) pouvant être focalisé sur la surface. Selon la présente invention, le support de données (3) et le système optique sont montés de façon stationnaire dans le dispositif et l'unité de déflexion (2) renferme des moyens déflecteurs pour la déflexion bidimensionnelle du faisceau laser (5). Ainsi, la vitesse de travail et la sécurité de fonctionnement peuvent être considérablement augmentées.
PCT/DE2001/004428 2000-11-25 2001-11-23 Dispositif d'enregistrement et de lecture optique de donnees WO2002043057A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10058711.9 2000-11-25
DE2000158711 DE10058711A1 (de) 2000-11-25 2000-11-25 Vorrichtung zur optischen Aufzeichnung und Wiedergabe von Daten

Publications (2)

Publication Number Publication Date
WO2002043057A2 true WO2002043057A2 (fr) 2002-05-30
WO2002043057A3 WO2002043057A3 (fr) 2003-05-08

Family

ID=7664745

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2001/004428 WO2002043057A2 (fr) 2000-11-25 2001-11-23 Dispositif d'enregistrement et de lecture optique de donnees

Country Status (2)

Country Link
DE (1) DE10058711A1 (fr)
WO (1) WO2002043057A2 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4995025A (en) * 1986-10-06 1991-02-19 Schulze Dieter M Spherical pivoting actuator for read/record head
WO1993023849A1 (fr) * 1992-05-15 1993-11-25 Samsung Electronics Co., Ltd. Dispositif pour courber un milieu d'enregistrement optique dans le sens de la largeur de celui-ci
US5425016A (en) * 1994-02-28 1995-06-13 Sutker; Hal Digital laser encoder/recorder/player, utilizing ellipsoidal memory medium
US5506398A (en) * 1994-07-08 1996-04-09 Fujitsu Limited Optical data recording and reproducing apparatus and method employing an optical head at the center of a spherical recording medium
EP0977193A1 (fr) * 1998-07-30 2000-02-02 Guido Sieber Dispositif d'enregistrement et de reproduction optique des données

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4995025A (en) * 1986-10-06 1991-02-19 Schulze Dieter M Spherical pivoting actuator for read/record head
WO1993023849A1 (fr) * 1992-05-15 1993-11-25 Samsung Electronics Co., Ltd. Dispositif pour courber un milieu d'enregistrement optique dans le sens de la largeur de celui-ci
US5425016A (en) * 1994-02-28 1995-06-13 Sutker; Hal Digital laser encoder/recorder/player, utilizing ellipsoidal memory medium
US5506398A (en) * 1994-07-08 1996-04-09 Fujitsu Limited Optical data recording and reproducing apparatus and method employing an optical head at the center of a spherical recording medium
EP0977193A1 (fr) * 1998-07-30 2000-02-02 Guido Sieber Dispositif d'enregistrement et de reproduction optique des données

Also Published As

Publication number Publication date
DE10058711A1 (de) 2002-08-08
WO2002043057A3 (fr) 2003-05-08

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