Optical Constants of Water in the 200nm to 200um Wavelength Region

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1、OpticalConstantsofWaterinthe200-nmto200-MmWavelengthRegionGeorgeM.HaleandMarvinR.QuerryExtinctioncoefficientsk(X)forwaterat25°Cweredeterminedthroughabroadspectralregionbyman-uallysmoothingapointbypointgraphofk(X)vswavelengthXthatwasplottedfordataobtainedfromareviewofthescienti

2、ficliteratureontheopticalconstantsofwater.Absorptionbandsrepresentingk(X)werepostulatedwheredatawerenotavailableinthevacuumuvandsoftx-rayregions.AsubtractiveKramers-Kroniganalysisofthecombinedpostulatedandsmoothedportionsofthek()spectrumprovid-edtheindexofrefractionn(X)forthe

3、spectralregion200nmX'200,um.I.IntroductionFresnelreflectanceequationforR(X),i.e.,theCau-Theindexofrefractionn(X)andtheextinctionchyequation,then2providedvaluesforn(X).coefficientk(X)ofwaterare,respectively,therealZolotarevetal.in1989reportedvaluesfortheandimaginarypartsofitssp

4、ectralcomplexrefrac-opticalconstantsofwaterthroughoutthespectralregion1-106gm.Theydeterminedbothk(X)andtiveindexFi(X)=n(X)-ik(X),whereXisthewave-lengthofanelectromagneticwaveinvacuum.n(X)fromtheir0measurementsofa(X)andR(X)forThesephysicalparameterstogetherwiththecom-waterat25C

5、inthe2-50-gmregionandmeasure-plexFresnelequationsandthegeneralizedFresnelmentsofinternalreflectancespectrainthe2-10-gmequationsprovidethebasisforcomputingtheopticalregion.Theirmeasurementsandreliabledatafrompropertiesofwater.Inrecentyearsknowledgeofthirteenotherpapersinthescie

6、ntificliteraturepro-theopticalpropertiesofwaterhasbeenofgreaterin-videdvaluesofk(X)throughoutthespectralregionterestbecauseofitsapplicationin(1)computingra-1-106gim.Valuesofn(X)werethenobtainedfromadiationtransportthroughatmospherescontainingKramers-Kronig(K-K)analysisofthek(X

7、)spec-trum:waterdropletsandotheraerosolsorthroughoceanscontaininghydrosols,(2)developmentofopticalre-motesensinginstrumentsformeasuringthechemi-2=12X-k(X)dA2(1)calandthermalqualityorturbidityofenvironmen-1=+-JX(X02X)talwatersandformeasuringthewatercontentofsoils,(3)computingth

8、eopticalpropertiesofplantFormakingtheintegrationindicatedbyEq