Information recording equipment, information replay equipment, recording method and replay method, and information recording medium

A technology for recording media and information recording, applied in optical recording/reproduction/erasing methods, optical recording/reproduction, data recording, etc., which can solve the problem that the recording light cannot be properly irradiated on the disc, etc.

Inactive Publication Date: 2004-10-13
PIONEER CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the axis of the pickup is inclined, and disadvantages such as recording light not being properly irradiated on the disc may occur

Method used

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  • Information recording equipment, information replay equipment, recording method and replay method, and information recording medium
  • Information recording equipment, information replay equipment, recording method and replay method, and information recording medium
  • Information recording equipment, information replay equipment, recording method and replay method, and information recording medium

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Embodiment Construction

[0030] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] FIG. 1 shows the structure of a holographic disc recording and playback device in an embodiment of the present invention (hereinafter simply referred to as "recording and playback device"). As shown in FIG. 1, the recording and reproducing apparatus 100 records information in a hologram disc (hereinafter simply referred to as "disc") 8 and reproduces the information therein. For example, the disc 8 is formed by injecting a holographic medium such as photopolymer between two glass substrates, and the same disc as used for holographic recording as used in the above-mentioned known art can be used . The disk 8 is rotated by the spindle motor 7 . It is worth noting that the rotation of the spindle motor 7 is controlled by the spindle servo method implemented during the recording and playback of ordinary optical discs.

[0032] Once the re...

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PUM

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Abstract

The information recording apparatus (100) generates the signal light (Ls) and the reference light (Lr) from one laser light, and irradiates the signal light and the reference light on the recording medium (8) to record the information by utilizing the interference fringes. Namely, the information recording apparatus executes a so-called hologram recording. Though the signal light is generated by spatial-modulating the laser light by the recording information, the one-dimensional spatial modulation is performed in the present invention. By performing the one-dimensional spatial modulation, recording the information is possible even if the recording medium is moving in a direction perpendicular or nearly perpendicular to the direction of the spatial modulation. Thereby, even if the irradiation position of the signal light and the reference light is moving relatively to the recording medium, e.g., while a disc-type recording medium is rotating, the hologram recording is possible. Thus, the random access performance to the recorded information can be improved and a configuration of the apparatus can be simplified.

Description

technical field [0001] The present invention relates to a method of recording and reproducing information by utilizing holograms. Background technique [0002] A method using holography is well known, such as a method of recording and reproducing information on a high-density optical recording medium. During the holographic recording process, reference light and signal light modulated in a mode corresponding to the recording signal are generated according to the laser light emitted by the laser source, and the reference light and signal light are irradiated on the recording medium. A recording medium is formed by sealing the hologram medium, and interference fringes formed by reference light and signal light are recorded on the recording medium. In reproducing information, only reference light is irradiated on the recording medium, and diffracted light generated by recorded interference fringes is received by a photodetector or the like to obtain recorded information. Reco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/00G11B7/0065G11B7/125G11B7/128G11B7/135G11B7/1353
CPCG11B7/128G11B7/0065G11B7/1353
Inventor 黑田和男
Owner PIONEER CORP
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