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

A technology of storage medium and holographic information, applied in the field of holographic information storage medium, can solve the problems of complex optical system, increased manufacturing cost, large aberration, etc., and achieve the effect of reducing manufacturing cost and complexity

Inactive Publication Date: 2010-08-11
SAMSUNG ELECTRONICS CO LTD
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  • Description
  • Claims
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Problems solved by technology

However, when the numerical aperture of the optical system is increased in order to increase the recording capacity, the optical system becomes very sensitive to movement (for example, tilt), and aberrations to be compensated also become excessive, thereby making the optical system complex and increased manufacturing costs

Method used

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  • Apparatus and method for recording/reproducing holographic data and holographic data storage medium
  • Apparatus and method for recording/reproducing holographic data and holographic data storage medium
  • Apparatus and method for recording/reproducing holographic data and holographic data storage medium

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Embodiment Construction

[0020] Reference will now be made in detail to the embodiments presented herein, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The embodiments are described in detail below in order to explain the present invention by referring to the figures.

[0021] The present invention will now be described more fully with reference to the accompanying drawings, which show exemplary embodiments of the invention. However, this invention may be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully describe the invention The concept is conveyed to those skilled in the art. In the drawings, the thicknesses of layers and regions are exaggerated for clarity. The same reference numerals in the drawings denote the same elements, and thus their d...

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Abstract

A method and apparatus for recording and / or reproducing holographic data and a holographic information storage medium, wherein the apparatus for recording and / or reproducing holographic information includes an optical pickup emitting light onto a holographic information storage medium and receiving the emitted light. The optical pickup includes: a light source unit emitting a signal beam and a reference beam in a recording mode; and a focusing optical system focusing the signal beam and the reference beam on one focal point in the holographic information storage medium so that information canbe recorded by using an interference pattern formed along a depth direction of the holographic information storage medium in the vicinity of the focal point, wherein the numerical aperture of the focusing optical system for the signal beam is different from the numerical aperture of the focusing optical system for the reference beam.

Description

technical field [0001] One aspect of the present invention relates to a method and apparatus for recording and / or reproducing holographic data and a holographic information storage medium, and more particularly, to a microscopic system for recording and / or reproducing holographic data with reduced aberration A method and device of the holographic type and a holographic information storage medium. Background technique [0002] Information storage technology using holograms has recently received attention. In information storage methods using holograms, information is stored in the form of optical interference patterns in light-sensitive inorganic crystal or polymer materials. The optical interference pattern is formed by using two coherent laser beams. That is, an interference pattern formed when reference light and signal light having different paths interfere with each other causes chemical or physical changes in the photosensitive storage medium, thereby recording the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/0065
CPCG11B7/1374G11B7/139G11B7/0065
Inventor 郑泽成裴在喆大塚达宏朴贤洙郑永民
Owner SAMSUNG ELECTRONICS CO LTD
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