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Hologram multiplex recording and method, and hologram reproducing device and method

A multiple recording and hologram technology, which is applied in the direction of recording/reproducing/erasing using optical interference patterns, optical recording/reproducing/erasing methods, recording information storage, etc., can solve the problems of diffraction efficiency, distortion, etc.

Inactive Publication Date: 2008-10-22
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, since the diffraction efficiency is affected in this area and its surroundings, the pattern of reproduced light will be greatly distorted.

Method used

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  • Hologram multiplex recording and method, and hologram reproducing device and method
  • Hologram multiplex recording and method, and hologram reproducing device and method
  • Hologram multiplex recording and method, and hologram reproducing device and method

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no. 1 Embodiment approach

FIG. 2 shows the structure of a hologram multiplex recording and reproducing device according to an embodiment of the present invention. The structure of the playback device can be divided into a recording medium support system, a recording system, and a playback system. The recording medium support system (not shown in FIG. 2 ) can rotatably support the hologram recording medium 101 to be recorded / reproduced, and it is preferable to rotate the hologram recording medium 101 around its central axis at a predetermined speed. Recording system, preferably comprising light source 11, shutter 12, fixed mirror 13, enlarging optical system 14, first 1 / 2 wavelength plate 15, beam splitter 16, spatial light modulator 17, lens 18, second 1 / 2 wavelength Plate 19 and movable mirror 20. These are further preferably integrated as a recording head, and arranged at a position movable to a predetermined distance from one surface of the hologram recording medium 101 to be recorded. The recordin...

no. 2 Embodiment approach

The hologram multiplex recording method according to the second embodiment of the present invention differs from the method according to the first embodiment in the setting of the incident angle of the reference light in each recording area. The other features (for example, the structure of the hologram multiplex recording device and the hologram recording medium, etc.) are the same, so for these same features, the relevant description of the above-mentioned first embodiment is cited.

[0044]

In the hologram multiplex recording method according to the second embodiment of the present invention, as in the method according to the first embodiment, a plurality of recording areas 102 are arranged on the recording medium 101 as shown in FIG. 3A . Here, for details of the hologram recording medium 101, the description of the first embodiment is referred to. In particular, 55 recording areas 102 are included in the recording medium 101, and 100 holograms are multiplexed and recorded ...

no. 3 Embodiment approach

The hologram multiplex recording method according to the third embodiment of the present invention differs from the method according to the first embodiment in the recording order. Other features (for example, the structure of the hologram recording and reproducing device and the hologram recording medium, etc.) are the same, and therefore, the relevant description of the above-mentioned first embodiment is referred to for these same features.

[0051]

In the hologram multiple recording method according to the third embodiment of the present invention, in the recording medium 101, as shown in FIGS. 9A and 9B, a plurality of recording areas 102 are arranged on concentric circles without overlapping each other. Here, for details of the hologram recording medium 101, the description of the first embodiment is referred to. In particular, 55 recording areas 102 are included in the recording medium 101, and 100 holograms are multiplexed and recorded in each recording area 102 by the...

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Abstract

A hologram multiplex recording device multiplex-records a hologram in each of recording regions provided in a hologram recording medium. After a hologram is multiplex-recorded a predetermined N times in each of the recording regions contained in a predetermined range or in the whole of the hologram recording medium, a hologram recording is performed for the (N+1) time in each of the recording regions contained in the range or the whole. Accordingly, while another n (n=0, 1, 2, ...) recording regions are overlain in each recording region arranged in the hologram recording medium, the multiplex degree difference between the recording regions does not exceed a predetermined n+1 in the aforementioned range or the whole of the hologram recording medium.

Description

Hologram multiplex recording device and method thereof, hologram reproducing device and method thereof technical field [0001] The present invention relates to hologram recording, and more particularly to a hologram multiplex recording device and method for multiplexly recording a plurality of holograms in an arbitrary recording region of a hologram recording medium. Background technique [0002] In recent years, with the rapid development of information technology including the digitization of information, the concept of "distributing (distributing) various content information including video and audio at high speed while maintaining high quality, so that users can make full use of it" is gaining ground. Furthermore, the user utilization information of "save the above-mentioned transmission data temporarily, for example, in a hard disk, select information desired to be stored for a long time from the stored data, edit the selected information, and store it in another rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03H1/26G03H1/02G03H1/04G11B7/004G11B7/0065G11B7/24035G11B7/24044
CPCG03H1/26G03H2222/36G11B7/0065G03H1/265G11B7/00772G11B7/08564
Inventor 杉田知也笠澄研一
Owner PANASONIC CORP
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