Hologram recording medium

A holographic recording medium and information recording technology, applied in data recording, optical recording carrier, recording information storage, etc., can solve problems such as limiting the recording density of optical discs
CN1771544AInactive Publication Date: 2006-05-10SAMSUNG ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SAMSUNG ELECTRONICS CO LTD
Publication Date
2006-05-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

PROBLEM TO BE SOLVED: To provide a hologram memory medium in which positioning of a beam spot for recording information is accurately controlled with respect to a recording medium by simple configuration and in which shift multiplexing recording is performed while performing two-dimensional positioning control in tangential and radial directions of the recording medium. SOLUTION: The hologram memory medium in which positioning of a beam spot for recording information is accurately controlled with respect to a recording medium and in which shift multiplexing recording is performed while performing two-dimensional positioning control in tangential and radial directions of the recording medium is provided by forming a recording layer and a reflective layer between at least two substrates, continuously or intermittently arranging protrusions or recesses for optical positioning control on the substrate adjacent to the reflective layer, and making the reflective layer side shape of the substrate nearly flat.
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Description

technical field

[0001] The present invention relates to a recording medium, and more particularly, to a holographic recording medium on which data is recorded by using interference fringes of an object beam and a reference beam. Background technique

[0002] Recently, a phase-shift type optical disk or a magneto-optical type optical disk is widely used as an information recording medium. In order to increase the recording density of such an optical disc, it is necessary to reduce the diameter of the beam spot and the distance between adjacent tracks or adjacent bits.

[0003] Although the recording density of optical discs has increased, the diffraction limit of the light beams used to record data on the surface physically limits the recording density of optical discs. Therefore, three-dimensional multiplexing recording including the depth direction is required to increase the recording density of the optical disc.

[0004] Therefore, a holographic...

Claims

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