ApplicationofPiezoTechnologyinHolographicStorage
HolographicStorageTechnology
Withthedevelopmentofsocietyandtheprogressoftechnology,people'sdemandfor informationkeepsincreasingDuetothemultimediaofinformation,people'sdataprocessingis nolongersimpletext,sound,image,butdigitalmultimediainformationintegratedbyhigh definitionandhighqualitysoundandmotionimageTherequirementofinformationdata storageishigherandhigher,especiallytherequirementofstoragesizeandrate,whichpromotes thedevelopmentofvariousstoragetechnologiesExistingmemorytechnologies,suchas magneticstorageandsemiconductorstorage,arestillimprovingtomeetthedemandsoflarge capacityandhighaccessrates,butthesestoragemethodsaregraduallyapproachingtheir physicallimitsHolographicstoragewillbeamoreidealstoragetechnologyHolographicoptical storagetechnologyisakindofinformationstoragetechnologywithgreatdevelopmentpotential, whichhasattractedmoreandmoreattentionbecauseofitsadvantagessuchashighinformation redundancy,highstoragecapacityandhighaccessrate.
Holographicstorageisanultrahighdensitystoragetechnologythatuseslightinterferenceto recordinformationintheformofholographyontherecordingmaterialandrecoverthestored informationintheformofdiffractionunderspecificconditions
ApplicationofPiezoTechnology inHolographicStorage
Theprincipleofholographicrecordingisthesameasthatofholography,butthespecificmethod isdifferent.Oneisthat,thedataisstorednotonfilmbutinamaterialthatreflectslight.Apiece ofmediumlikethesizeofasmallsugarcubecontainsthousandsofpages,eachcontaining millionsofbitsofinformationSecond,thewayofusingobjectlightisdifferent Duringthewriteoperationofholographicstorage,theoutputofalaserbeamisdividedintotwo beams,oneofwhichisexpandedandthenprojectedontherecordingmediumasareference lightAftertheotherlaserbeamisexpanded,itisreflectedbythesurfaceoftherecordedobject, andastheobjectlight,itisalsoprojectedontotherecordingmedium.Theobjectlightisusedto carrythedata,whichisexpandedtobeabletofullyilluminatetheentirestereolightmodulator (SLM).TheSLMissimilartoanLCDpanel,whichdisplaysthebinarydatatobestoredinanarray oflightanddarkpixelsinafullpagefashionAftertheobjectlightpassesthroughtheSLM,some lightupandsomedim,whichistocarrythedataofthepage.Then,thesamereferencelightacts inthemedium,turningthewholepageofdataintoaninterferencefringepattern,andthewhole pageofdataisstoredinthemediumthroughtheinterferencepattern.
ApplicationofPiezoTechnologyinHolographicStorage Whenreadingdata,animageofthebrightanddarkpixels(denotedasonesandzeros)thatwere originallywritteninisreturnedtothereadingarrayofaCCD(chargeCoupleddevice)byshininga referencelightonthestoragemediumanddiffusingitsinternalinterferencepatternTheentire pageofdatacanthenberead. CharacteristicsofHolographicStorage (1)HighstoragedensityandlargecapacityThehighstoragedensityisobtainedbyrecording multiplehologramsinthesameareaofthephotosensitivematerialAtpresent,themost commonlyusedmultiplerecordingmethodsaremultiwavelength,multiangleandmultiphase recordingInordertoobtainhigherstoragedensity,severalmultiplerecordingmethodscanbe integrated. (2)Highdatatransmissionspeedandshortaccesstime.Hologramsarestoredandreadina pagewidemanner,whereallinformationbitsonapagearerecordedandreadinparallelIn addition,theholographicdatabasecanbeaddressedbyinertiafreebeamdeflectionor wavelengthselection,notnecessarilybytheelectromechanicalreadwriteheadrequiredindisk andopticaldiskstorage,sothedatatransmissionrateandaccessratecanbefurtherimproved. (3)Highredundancy.Differentfrombitbybitdisksanddiscs,hologramsstoreinformationina distributedwayEachbitofinformationisstoredontheentiresurfaceorvolumeofthehologram, solocaldefectsanddamageoftherecordingmediumwillnotcauseinformationloss.
ApplicationofPiezoTechnologyinHolographicStorage (4)Highstoragereliability.Holographicstoragematerialsaresilversaltcrystals,organicpolymer ormetalcompoundcrystalswithgoodopticalpropertiesandstablechemicalpropertiesEvenif thestoragecarrierispartiallydamaged,thedatacanstillberead,andtheinformationrecorded bytheholographicstoragematerialcanbekeptformorethan30years CoaxialHolographicDiscDataStorageSystem Wehaveintroducedsomuchinformationaboutholographicstorage,whatistheroleofpiezo technologyinholographicstorage? CoreMorrowPiezoProducts CoreMorrowpiezotechnologyisakindofmicromotioncontroltechnologybasedonPZTinverse piezoelectriceffectItsultrahighprecisionpositioncontrolandultrafastadjustmentresponse providefastandhighprecisionopticalpathcontrolforholographicopticalstoragetechnology. Therearemanykindsofpiezoproductsbasedonpiezotechnology,whichcanbelinearmotionor angularmotion.Atthesametime,itisalsoacombinationoflinearmotionandangularmotion. 01.PiezoObjectiveScannerProducts CoreMorrowpiezoobjectivescannerproductsarespecificallydesignedforcarryingtheobjective lenstodonanometerlinearstepmovementsoastoachievethemicroscopicandfocusing purpose.Itcanrealizeamicroscopiclenslinearprecisionpositioncontrolwithprecisionuptonm level,loadcapacity500g,movementrange1mm,andtheresponsetimeisonlyafew
ApplicationofPiezoTechnologyinHolographicStorage milliseconds. Thepiezoobjectivescannerisconnectedtotheobjectivelensthroughanadaptertoquicklylock theobjectivelensintothedesiredpositionAvarietyofthreadedteethareavailable,suchas M27×0.75,M26×0.75,M26×1/36",M25×0.75,W0.8×1/36",etc.,andcanalsobe customizedforeasyintegrationandinstallationwiththemicroscopeItcanmatchZeiss,Nikon, Olympus,Leicaandotherstandardlenses.Itcanalsobeusedincombinationwithamanual controltableviaanadapter P73SeriesPiezoObjectiveScanner TechnicalData
ApplicationofPiezoTechnologyinHolographicStorage P76SeriesPiezoObjectiveScanner TechnicalData
ApplicationofPiezoTechnologyinHolographicStorage 02.CoreMorrowPiezoTip/TiltStage
multiaxialangulartiltmotionthroughtheexpansionofinternalpiezoactuator,itssmallamount ofcompensationensuresthatthedeflectionmirrorwithhighaccuracyandstabilityofmovement Thebuiltinhighprecisionsensorsforclosedloopcontrol,achievessubmicroradianresolution andmicroradianpositioningaccuracy
reflection/transmissionopticalpathThedeflectionrangeofCoreMorrowtiptiltstageisupto
Piezotiptiltstageisdrivedbypiezoactuator,withinternalnonreturndifferenceflexiblehinge parallelguidestructuredesign,andtheexternalmechanicalstructureachievesuniaxialor
Piezotiptiltstagecanrealizethehighprecisionrealtimesteeringadjustmentoftheopticalpath, whichcangenerateθx,θyaxisdeflection,andoptionallinearaxis,usedtodrivethe reflection/transmissionlenstodeflectandchangethepathdirectionofthe 43mrad,andthebearingcapacityisuptoφ110mmlensIthasnradaccuracyandresponsetimes
uptomilliseconds P33Tip/TiltStage TechnicalData
ApplicationofPiezoTechnologyinHolographicStorage P35APiezoTip/TiltPlatform TechnicalData
