Search results for "Photorefractive crystal"

showing 2 items of 2 documents

Multiplexing of encrypted data using fractal masks

2012

In this Letter, we present to the best of our knowledge a new all-optical technique for multiple-image encryption and multiplexing, based on fractal encrypting masks. The optical architecture is a joint transform correlator. The multiplexed encrypted data are stored in a photorefractive crystal. The fractal parameters of the key can be easily tuned to lead to a multiplexing operation without cross talk effects. Experimental results that support the potential of the method are presented.

ImaginationImage EncryptionSystemComputer sciencemedia_common.quotation_subjectComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONTransformPhysics::OpticsStorageEncryptionMultiplexingCrosstalkSearch engineOpticsFractalElectronic engineeringDomainComputer Science::Information TheoryComputer Science::Cryptography and Securitymedia_commonbusiness.industryAtomic and Molecular Physics and OpticsOptical encryptionFISICA APLICADAPhotorefractive crystalOptical EncryptionbusinessTelecommunications
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Photorefractive “camera obscura”

2011

Abstract We demonstrate a novel scheme for lensless image formation which combines the properties of an amplifying dynamic hologram and a pinhole camera. The scheme is realized on the base of a SPS:Sb1% photorefractive crystal working at 633 nm.

PhysicsImage formationbusiness.industryHolographyPhotorefractive effectPhysical opticsAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic Materialslaw.inventionOpticslawPhotorefractive crystalPinhole cameraOptoelectronicsElectrical and Electronic EngineeringPhysical and Theoretical ChemistrybusinessCamera obscuraOptics Communications
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