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Shift-insensitive storage of information in page oriented optical data storage systems

An optical data and sensitive technology, which is applied in data recording, information storage, recording information storage, etc., can solve problems such as blurred images, and achieve the effect of improving detection ability and alignment

Inactive Publication Date: 2009-07-08
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long exposures or rapid movement of media result in blurry images

Method used

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  • Shift-insensitive storage of information in page oriented optical data storage systems
  • Shift-insensitive storage of information in page oriented optical data storage systems
  • Shift-insensitive storage of information in page oriented optical data storage systems

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Experimental program
Comparison scheme
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Embodiment Construction

[0043] figure 1 The effect of displacement of the media position relative to the optics in the read process compared to the write process is shown. The image intensity of the data page read out on the detector is shown as a function of displacement based on the model. Further, the relative image displacement of the read-out image on the detector is shown as a function of media displacement.

[0044] figure 2 Displays the same image intensity and image displacement based on the measurements. The imprecise positioning of the data pages will significantly degrade the image received on the detector compared to the optical path, and thus reduce the SNR. Alignment is especially challenging in systems with continuously rotating disks.

[0045] image 3 A data page 1 known from the prior art read out by a holographic system is shown. Light and dark pixels of the same size are distributed across data page 1.

[0046] Figure 4 Shows that during the readout process, when the da...

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PUM

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Abstract

The present invention relates to a data page for optical data storage for an optical storage system, i. e. a holographic storage system with less sensitive against a movement, which relates to a holographic storage medium (19) including such data page (3), a device (10) for read and / or write from optical medium (19) comprising such data pages (3), and a method to read and / or write such data pages (3). The data pages (3) for optical data storage is discloses while the data pages comprises one or more areas, which are less sensitive against a movement of the data page in a movement direction of the storage medium.

Description

technical field [0001] The invention relates to data pages with enhanced insensitivity to movement for optical data storage in an optical storage system, such as a holographic storage system, to an optical storage medium, such as a A holographic storage medium comprising such a data page, to a device for reading from and / or writing to an optical storage medium comprising such a data page, and to a device for reading and / or writing Such a data page method. Background technique [0002] The present invention is described below using a holographic storage system as an example. It will be apparent to those skilled in the art that the present invention can be applied in other optical storage systems. [0003] In holographic data storage, digital data is stored by encoding an interference pattern produced by the superposition of two coherent laser beams, one of which, the so-called "object beam", is modulated by a spatial light modulator (SLM) And carry the information to be re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/0065
CPCG11B7/00781G03H1/02G03H1/22G11B7/0065
Inventor 鲁道夫·艾伯格弗兰克·普齐戈达奥利弗·马尔基
Owner THOMSON LICENSING SA