简介:Aprocesssuitableforproductiononalargescaleofcoldlightmirrorforfilmprojectorisintroduced.DepositionparametersrequiredforproducingTiO2/SiO2opticalmultialyersystemsbyelectronbeamevaporationofTiO2andSiO2startingmaterialsareinvestigated.Manufactureandtechniquesofcoldmirrorandtheadhesion,stability,wearandcorrosionresistanceofcoldmirrorbythisprocessarediscussed.Theresultshowsthatcoldmirrorproducedhasgoodopticalpropertiesandbetteradhesion.
简介:Anewmethodtoreducethenumericaldispersionofthethree-dimensionalAlternatingDi-rectionImplicitFinite-DifferenceTime-Domain(3-DADI-FDTD)methodisproposed.Firstly,thenumericalformulationsofthe3-DADI-FDTDmethodaremodifiedwiththeartificialanisotropy,andthenewnumericaldispersionrelationisderived.Secondly,therelativepermittivitytensoroftheartificialanisotropycanbeobtainedbytheAdaptiveGeneticAlgorithm(AGA).Inordertodemon-stratetheaccuracyandefficiencyofthisnewmethod,amonopoleantennaissimulatedasanexam-ple.Andthenumericalresultsandthecomputationalrequirementsoftheproposedmethodarecom-paredwiththoseoftheconventionalADI-FDTDmethodandthemeasureddata.Inadditionthere-ductionofthenumericaldispersionisinvestigatedastheobjectivefunctionoftheAGA.Itisfoundthatthisnewmethodisaccurateandefficientbychoosingproperobjectivefunction.