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Polarized holographic optical memory device of using film of photochromic material as recording medium

A holographic optical storage and material thin film technology, applied in optical recording/reproduction/erasing methods, using optical interference patterns for recording/reproduction/erasing, optics, etc., can solve the problem of low signal-to-noise ratio of reproduced images, and achieve Improved data storage density and capacity, good fatigue resistance and stability, and high spatial resolution

Inactive Publication Date: 2006-02-01
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The object of the present invention is to provide a high-density holographic optical storage device that uses a photochromic material film as a rewritable holographic recording medium, uses its light-induced anisotropy to perform orthogonal polarization holographic recording, and obtains a reproduced image with a high signal-to-noise ratio , which solves the technical problem of the low signal-to-noise ratio of the reproduced image of the ordinary holographic optical storage device in the background technology

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  • Polarized holographic optical memory device of using film of photochromic material as recording medium
  • Polarized holographic optical memory device of using film of photochromic material as recording medium
  • Polarized holographic optical memory device of using film of photochromic material as recording medium

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[0020] A photochromic material film with light-induced anisotropy is used as a rewritable holographic recording medium. In the embodiment, a biomolecular photochromic material—bacteriorhodopsin or an organic photochromic material—fulginic anhydride is used. The bacillus rhodopsin film or fulgid anhydride film is a film prepared by mixing bacillus rhodopsin or fulgid anhydride with a high molecular weight polymer (such as gelatin, polyvinyl alcohol, PMMA, etc.) in a certain proportion on a transparent glass. A transparent protective layer is applied to protect the film from mechanical damage. Bacteriorhodopsin is a light-sensitive protein extracted from halophilic bacteria. The full name is bacteriorhodopsin (bacteriorhodopsin), referred to as bacteriorhodopsin or BR. Bacillus rhodopsin can be wild type, chemically modified or genetically modified. What used in this embodiment is a kind of genetically modified BR-D96N bacillus rhodopsin film, the film thickness is about 80m, a...

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Abstract

A polarization holographic storage device of using photochromic material film as recording media is prepared as using space light modulator as page information input element, using image collector as information reading out unit and using photochromicmaterial material film as recording material, using light of photochromic material to lead each anisotropy , using orthogonal polarization light as object light and reference light to record modulated holography for raising image S ¿C N ratio, using bacteria sclererythrin film or fulgide film as erasable holographic recording media.

Description

technical field [0001] The invention relates to a holographic optical storage device, in particular to a Fourier transform angle multiplexing polarization holographic optical storage device using a photochromic material thin film as a recording medium. Background technique [0002] High density, large capacity, and high access speed are the development directions of optical storage technology. Holographic optical storage has become one of the important development directions of optical storage because of its high storage density, large storage capacity and high data access speed. The key to improving storage density and capacity of holographic optical storage is to use multiplexing technologies, such as angle multiplexing, wavelength multiplexing, spatial multiplexing, etc.; because holographic optical storage uses parallel information writing and reading methods, one write and read The amount of data can be very large, so the data access speed is high. Holographic recordin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/0065G02B27/00G03H1/00
Inventor 姚保利郑媛门克内木乐王英利任志伟
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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