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Reproduction apparatus and reproduction method

A technology for reproducing equipment and areas, applied in optical recording/reproducing/erasing methods, recording/reproducing with optical methods, recording/reproducing/erasing using optical interference patterns, etc., can solve the problem of inaccurate recovery of phase information and other issues to achieve the effect of preventing data corruption and preventing intensity concentration

Inactive Publication Date: 2010-03-17
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, when the image sensor 104 detects the same value corresponding to "+1" and "-1", the lost phase information cannot be accurately recovered by performing any signal processing at a subsequent stage.

Method used

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  • Reproduction apparatus and reproduction method
  • Reproduction apparatus and reproduction method
  • Reproduction apparatus and reproduction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0091] Hereinafter, the best mode for carrying out the present invention (hereinafter, referred to as an embodiment) will be described.

[0092] It should be noted that description is performed in the following order.

[0093] 1. Structure of recording and reproducing equipment

[0094] overall structure

[0095] phase modulation recording

[0096] 2. Reproduction method based on the DC light superposition system according to the embodiment

[0097] Operation overview

[0098] Configuration to realize the reproducing method according to the embodiment

[0099] Simulation results

[0100] The effect of the embodiment

[0101] 3. Modify the example

[0102] 1. Structure of recording and reproducing equipment

[0103] overall structure

[0104] figure 1 is a block diagram of the internal configuration of the recording and reproducing apparatus according to the embodiment of the present invention.

[0105] Here, a case is shown in which the reproducing device according...

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PUM

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Abstract

The invention provides a reproduction apparatus and an reproduction method. In a reproduction apparatus, a modulation control generates reference light by performing a drive control on respective pixels in reference light areas of a spatial light modulator and a phase modulator and also generates DC light added to a reproduction image by performing a drive control in a signal light area of a spatial light modulator to apply a spatial light intensity modulation at a same modulation amount in all pixels and performing a drive control in a signal light area of the phase modulator while setting one part of phase modulation amounts as a phase modulation amount for setting a same phase as a reference phase in the reproduction image obtained from a hologram recording medium in accordance with irradiation of the reference light and setting the other part of the phase modulation amounts as a phase modulation amount different by [pi] with respect to the one part of the phase modulation amounts.

Description

technical field [0001] The present invention relates to a reproducing apparatus and a reproducing method configured to reproduce data recorded on a hologram recording medium by interference fringes generated by reference light and signal light. Background technique [0002] For example, Japanese Unexamined Patent Laid-Open Nos. 2006-107663 and 2007-79438 disclose hologram recording and reproducing systems in which holograms are formed by interference fringes generated by signal light and reference light. image, and reproduce the data recorded in the form of a hologram as interference fringes by irradiating reference light. The hologram recording and reproducing system includes a so-called coaxial system in which signal light and reference light are arranged on the same axis for recording. [0003] Figure 14 , 15A and 15B are explanatory diagrams for describing a hologram recording and reproducing system of a coaxial system. Figure 14 shows the recording system, while F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/0065G11B7/125G11B7/135G03H1/12
CPCG03H2225/60G03H2001/2675G03H1/12G03H2225/33G11B7/0065G11B7/128G11B7/1395
Inventor 德山一龙
Owner SONY CORP
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