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Reproducing apparatus and reproducing method

A technology for reproducing device and generating device, applied in optical recording/reproducing/erasing method, recording/reproducing by optical method, recording/reproducing/erasing using optical interference pattern, etc., can solve the problem of difficult to achieve high recording density And other issues

Inactive Publication Date: 2011-08-03
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This makes it difficult to achieve high recording densities

Method used

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  • Reproducing apparatus and reproducing method
  • Reproducing apparatus and reproducing method
  • Reproducing apparatus and reproducing method

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Comparison scheme
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Embodiment Construction

[0072] Based on the following outline, the present invention is described in further detail with reference to specific examples.

[0073] 1. Configuration of recording / reproducing device

[0074] 1.1 General configuration

[0075] 1.2 Spatial Light Modulator (SLM) and Intensity / Phase Modulation Controller

[0076] 1.3 Data regeneration unit

[0077] 2. Read operation

[0078] 3. Experimental results

[0079] 4. Variations

[0080] 1. Configuration of recording / reproducing device

[0081] 1.1 General configuration

[0082] figure 1 is a block diagram showing the internal configuration of the recording / reproducing device 1 according to the embodiment of the present invention. It should be noted that figure 1 Only main parts including an optical system, a data modulating section, and a reproducing section are shown, and other parts are not shown.

[0083] In the hologram recording / reproducing device of this embodiment, a coaxial arrangement is used. More specifically...

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Abstract

In a reproducing apparatus adapted to reproduce data recorded on a holographic recording medium, a reference light generator generates reference light for illuminating the holographic recording medium, and a coherent light generator generates coherent light having an intensity greater than the absolute value of a minimum amplitude of a reproduced image and having a phase equal to the phase of thereproduced image. An image signal acquisition unit senses the reproduced image produced by illuminating the holographic recording medium with the reference light and the coherent light, and acquires an image signal based on the reproduced image. A square root calculation unit calculates the square root of each of values constituting the image signal. A removal unit removes the component of the coherent light from the calculated square root, whereby the data recorded on the holographic recording medium is correctly reproduced.

Description

[0001] Cross-References to Related Art [0002] The present application contains subject matter related to Japanese Patent Application JP 2006-337511 filed in the Japan Patent Office on December 14, 2006, the entire content of which is hereby incorporated by reference. technical field [0003] The present invention relates to a reproducing device and a reproducing method for reproducing data recorded on a holographic recording medium in the form of interference fringes due to interference between reference light and signal light. Background technique [0004] In holographic recording / reproducing technology, especially in holographic recording / reproducing technology for optical storage, an SLM (Spatial Light Modulator) such as a transmissive liquid crystal panel or a DMD (Digital Micromirror Device) is used to convert a given signal The light intensity of the light is modulated eg as a bit sequence having a level "1" (eg corresponding to a high intensity) or a level "0" (eg c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/0065G11B7/125G03H1/12
CPCG03H2210/562G03H1/22G11B7/083G03H2223/12G03H2223/13G11B7/0065G03H2001/0441G11B7/1369G11B7/128
Inventor 原雅明杉木美喜雄德山一龙外石满田中健二广冈和幸
Owner SONY CORP
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