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System for storing holographic digital data

A technology of digital data and storage system, applied in the field of volume holographic digital data storage system, can solve the problem of impossible to increase the recording density of storage medium and so on

Inactive Publication Date: 2004-11-03
DAEWOO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the conventional holographic digital data storage system, it will be impossible to increase the recording density of the storage medium beyond a certain degree

Method used

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  • System for storing holographic digital data
  • System for storing holographic digital data
  • System for storing holographic digital data

Examples

Experimental program
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Embodiment Construction

[0028] Description of the preferred embodiment

[0029] see image 3 , which shows a volume holographic digital data storage system 2 according to a preferred embodiment of the present invention.

[0030] The storage system 2 of the present invention is generally the same as the prior art shown in FIG. 1 , except that an iris diaphragm 206 and a first actuator 208 are added therein. The functions of other components in the storage system 2 except the iris 206 and the first actuator 208 are basically the same as those of the prior art.

[0031] The volume holographic digital data storage system 2 includes a light source 200 for emitting laser beams and a holographic medium 230 for storing holographic data therein, such as photorefractive crystals.

[0032] The beam expander 201 expands the size of the laser beam emitted by the light source 200 and sends the expanded laser beam to the beam splitter 204 .

[0033] Between the beam splitter 204 and the holographic medium 230, tw...

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Abstract

A volume holographic digital data storage system includes a light source, a beam splitter, a spatial light modulator (SLM), a beam reducer including a beam transmission region and a beam absorption or reflection region, a first actuator, a first reflection mirror, a second reflection mirror, a first lens, a second actuator and a storage medium. By reducing the size of a reference beam through the use of the beam reducer and varying an incident location of the reference beam on the first lens by changing the positions of the beam reducer and the first or second reflection mirror, recording density of a holographic digital data storage system can be greatly increased.

Description

technical field [0001] The invention relates to a volume holographic digital data storage system; further relates to a volume holographic digital data storage system capable of increasing the recording density of the holographic digital data. Background of the invention [0002] It is well known that there is an increasing demand for volume holographic digital data storage systems that can store large amounts of data, such as movie frame data. Accordingly, various types of holographic digital data storage systems have recently been developed to achieve high-density optical storage capacity. [0003] Volume holographic digital data storage systems allow a signal beam containing information to interfere with a reference beam to generate an interference pattern therebetween, and then manipulate the interference pattern to store it in a storage medium made of photorefractive crystals. A photorefractive crystal is a material that responds differently to different amplitudes and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03H1/04G03H1/18G03H1/26G11B7/0065G11B7/135
CPCG03H1/265G11B7/0065G03H1/18
Inventor 卢载遇
Owner DAEWOO ELECTRONICS CO LTD