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Optical storing and reading method for super high density information storage medium

An information storage and ultra-high-density technology, applied in information storage, optical recording/reproduction, recording information storage, etc., can solve problems such as large signal contrast and variability of recorded data

Inactive Publication Date: 2004-11-17
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide an optical storage and reading method for ultra-high-density information storage media. The method has a large signal contrast and a detection area of ​​only 1 micron, which is suitable for reading out ultra-high-density storage information, and solves the problem of The problem of the variability of recorded data in recording media such as magneto-optic and photorefractive, and the data can be read without damage

Method used

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  • Optical storing and reading method for super high density information storage medium
  • Optical storing and reading method for super high density information storage medium
  • Optical storing and reading method for super high density information storage medium

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Example 1: Please see figure 1 , the recording medium (3) is a molybdenum trioxide / octadecylamine composite film, and a 500W high-pressure mercury lamp with a filter ( figure 2 shown). The ratio of scattered signal intensity in the area before and after illumination is at most 1:6 (24:151) at 795 wavenumbers, and the signal contrast is large. The results show that this method is suitable for the storage and readout of high-density information.

Embodiment 2

[0024] Embodiment 2: use the frequency doubled pulse laser (265 nanometers) of Nd-doped yttrium aluminum pomegranate laser as the information recording light, the spot diameter is 1 micron, the light intensity is 1 millijoule per pulse, and the number of times of illumination is 10 pulses, forming a diameter of 1 µm dark purple recording spot. The rest of the readout conditions are the same as in Example 1, and the scattered light intensity is plotted against the scattered light frequency to obtain the same two curves as in Example 1.

Embodiment 3

[0025]Embodiment 3: the recording medium is molybdenum trioxide / ethylenediamine composite thin film, and the pulsed laser light (337 nanometers) of molecular nitrogen laser is the information recording light, and the spot diameter is 1 micron, and light intensity is 1 millijoule per pulse, and the number of times of illumination is 10 pulses to form a dark blue spot with a diameter of 1 micron, which can be stored for a long time. After the optical recording process is completed, the 546 nanometer light of the mercury lamp is used as the information readout light, the light intensity is 0.1 milliwatts, the spot area of ​​the light after focusing is 1 square micron, and the scattered light is monochromatic through the color separator (the resolution is 1.0 wave number) is detected with a photomultiplier tube. The scattered light intensity is plotted against the scattered light frequency to obtain the following image 3 In the two significantly different curves shown, the inten...

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Abstract

The optical storing and reading method for superhigh density information storage medium is one double-wavelength data recording and reading method. That is, light of one wavelength is used as information recording light, which is focused and acted to the record medium to produce photochemical reaction in the light irradiated area to change structure, color and other property. Light of one other wavelength is used as information reading out light, which is irradiated to the record medium to recognize the recorded information based on the difference in scattering light signal caused by the recorded light produced structure change.

Description

technical field [0001] The invention belongs to a method for storing, writing and reading out an optical information storage medium, in particular to a two-beam pure optical storage and reading method for an ultra-high-density information storage and reading medium. Background technique [0002] At present, the most mature, common and commercialized optical storage technology is optical disc storage, but the method of storing and reading ultra-high-density information has received the same attention as the ultra-high-density information storage medium, and is still being researched. [0003] The storage of information on optical discs is mainly based on the thermal effect of laser light, that is, the use of focused laser light to produce physical and chemical changes in the micro-regions of the medium to write information. There are four main types of optical discs according to their functions: read-only storage discs, write-once discs, rewritable discs, and direct-rewritabl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/004G11B7/0045G11B7/005
Inventor 姚建年陈朝晖
Owner INST OF CHEM CHINESE ACAD OF SCI