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Polarization balance measurement reading method and device based on nano photoetching optical disc

A reading device and polarization direction technology, applied in the optical field, can solve problems hindering the development of optical disc technology, and achieve the effect of improving information storage dimension, storage density and storage capacity, and high stability

Active Publication Date: 2020-08-07
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For optical disc technology, the limitation of storage capacity seriously hinders the development of optical disc technology.

Method used

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  • Polarization balance measurement reading method and device based on nano photoetching optical disc
  • Polarization balance measurement reading method and device based on nano photoetching optical disc
  • Polarization balance measurement reading method and device based on nano photoetching optical disc

Examples

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Effect test

no. 1 example

[0050] Such as figure 1 shown, where figure 1 The left figure in the middle shows an optical disc physical storage medium. The writing method based on nanolithography and the polarization balance measurement and reading method described in this application are both applied to the optical disc physical storage medium. Its structure includes:

[0051] 1) protective layer 101, which enables the optical disc to withstand frequent use, fingerprints, scratches and dirt, thereby ensuring the storage quality and data security of the optical disc;

[0052] 2) Absorption modulation layer 102, the material of this layer has absorption modulation characteristics, and the thickness of this layer is less than 500nm. The absorption modulation layer materials include diarylethene, fulginic anhydride materials, and azide materials, but are not limited to these;

[0053] 3) The birefringence writing recording layer 103 is used for writing and recording information. This layer is characterized ...

no. 2 example

[0059] A. The writing method based on nanolithography and the polarization balance measurement reading method described in this application are combined with 2 m Bit multi-level information encoding method. Such as figure 1 In the middle right figure, assuming m=3, different groove depths Z are performed at (1), (2), and (3) at the fixed recording position 112 on the birefringent writing recording layer 103 1 ,Z 2 ,Z 3 The continuous writing of , wherein, writing at the corresponding (m) means that the recording point "1" is recorded at this place, otherwise it is "0", and different (m) corresponds to 2m Different digits in the bit coding; so far, the information recording at the fixed recording position 112 is completed, and then move to the next fixed position according to the example direction of 111, and repeat the above process to complete the data recording; and so on, complete the whole process of data storage .

[0060] Among them, for X m The bit multi-level info...

no. 3 example

[0087] In this embodiment, steps S302-S304 are the main process of the polarization balance measurement and reading method. The principle of the polarization balance measurement reading method is as follows Figure 4 shown. As shown in the figure, the polarization direction of the linearly polarized light beam 401 is fixed at 402, and the incident perpendicular to the optical axis of the birefringent material 403 is divided into two beams of o light and e light due to the birefringent effect. Since the incident perpendicular to the optical axis, the two beams The beam beams are not separated in space, as shown in 404; the propagation distance in the birefringent material is d, because the birefringent material has different absorption rates for the S and P polarization components of o light and e light, so that o light and e light The polarization of the light changes at a certain angle, as shown in 405; the polarization direction of the beam after the action of the birefring...

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Abstract

The invention provides a polarization balance measurement reading method and device based on a nano photoetching optical disc. The storage information of an ultra-high density optical disc is inscribed by adopting a nano photoetching method, the information is stored by adopting a birefringence inscribing recording material, and erasable information is stored by adopting a photoinduced birefringence recording material, so that erasable repeated information recording of the nano photoetching optical disc can be realized. The reading method comprises the following steps: reading optical disc information by a polarization balance measurement reading method; realizing quick reading of multi-dimensional storage information of the optical disc by adopting a digital information encoding and decoding method. According to the invention, the size and the spacing of the information recording points are reduced, the storage density of the optical disc is improved, the stable and long-term storageof the optical disc storage information is realized, and the effective and high-speed extraction of the ultra-high density optical disc storage information is realized.

Description

technical field [0001] The present application relates to the field of optical technology, in particular to a method and device for measuring and reading polarization balance based on nano-lithography optical discs, and a method and device for erasable nano-writing and reading. Background technique [0002] With the development of technologies such as gene sequencing and brain activity reading, not only a large amount of data is generated, but also higher requirements are put forward for how to store the data effectively, stably and accurately. Based on the above-mentioned background, the optical disk storage technology has well adapted to the requirements of the times due to its advantages of energy saving, long storage life, good safety and easy processing. As for optical disc technology, the limitation of storage capacity seriously hinders the development of optical disc technology. [0003] In order to increase the capacity of the optical disc, the traditional technical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/005G11B7/0045G11B7/007G11B7/125G11B7/1376G11B7/24035G11B7/24053G11B7/24062
CPCG11B7/0052G11B7/0045G11B7/007G11B7/125G11B7/1376G11B7/24035G11B7/24053G11B7/24062G11B2007/00709
Inventor 王中阳张力
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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