Apparatus and method for recording/reproducing data on/from holographic storage medium

a technology apparatus, applied in the field of apparatus and method for recording/reproducing data, can solve problems such as data reproduction failure, and achieve the effect of increasing the reproduction reliability of holographic storage medium

Inactive Publication Date: 2008-08-28
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012]Aspects of the present invention provide an apparatus and method for recording / reproducing data, which can be reproduced over a constant temperature range. The constant temperature range allows for consistent reproduction of the data, from a holographic storage medium, thereby increasing the reproduction reliability of the holographic storage medium.
[0015]According to another aspect of the present invention, there is provided an apparatus for reproducing data from a holographic storage medium, the apparatus comprising: a light processing unit to record the data on the holographic storage medium and / or to reproduce the data from the holographic storage medium; and a control unit to control the light processing unit, such that temperature information of the holographic storage medium, an ambient temperature thereof and / or information on a recording wavelength, are read from the holographic storage medium, after the data has been recorded on the holographic storage medium. The control unit can further control the light processing unit, such that a reproducing wavelength is determined, using the read information, and the data is read from the holographic storage medium using the determined reproducing wavelength.

Problems solved by technology

Therefore, the temperature induced changes in the reproduction conditions, with respect to the recording conditions, often result in a data reproduction failure.

Method used

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Embodiment Construction

[0028]Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments are described below in order to explain the present invention by referring to the figures.

[0029]Holograms can be recorded on a holographic storage medium using a reference beam and a signal beam. Interference between the two beams creates a plurality of gratings, which make up each hologram. The refractive properties (refractive direction and size) of the gratings vary according to changes in the temperature of the holographic storage medium. Therefore, the intensity of a signal beam, produced when the reference beam is directed to the gratings, can be diminished due to temperature changes. The change in the intensity of the signal beam can be predicted using the Bragg condition.

[0030]To address a drop of the intensity of a signal beam, the...

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Abstract

An apparatus and a method for recording / reproducing data on a holographic storage medium using temperature information of the holographic storage medium. The apparatus includes: a light processing unit to record the data on the holographic storage medium or to reproduce the data from the holographic storage medium; and a control unit to control the light processing unit, such that the data is recorded on the holographic storage medium, using a recording wavelength determined according to a temperature of the holographic storage medium or an ambient temperature thereof.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of Korean Application No. 2007-18092, filed Feb. 22, 2007, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]Aspects of the present invention relate to a holographic storage medium, and more particularly, to an apparatus and method for recording / reproducing data.[0004]2. Description of the Related Art[0005]In optical holography, the volume of a recording medium is used to store data, instead of just the surface. The interference between a signal beam and a reference beam produces interference gratings, which are referred to as data pages, in the recording media. The interference gratings are superimposed, by changing the optical characteristics of the reference beam. This process is referred to as multiplexing. When reading data, a single reference beam is made to be incident into the rec...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G11B7/00
CPCG11B7/0065G11B7/127G11B7/083G11B7/00781G11B7/0045
Inventor JEONG, TAEK-SEONG
Owner SAMSUNG ELECTRONICS CO LTD
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