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
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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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