ASTM E1175-1987(2009) 用大直经积分球测定材料的太阳能或光反射性,透明性和吸收性的标准试验方法

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【英文标准名称】:StandardTestMethodforDeterminingSolarorPhotopicReflectance,Transmittance,andAbsorptanceofMaterialsUsingaLargeDiameterIntegratingSphere
【原文标准名称】:用大直经积分球测定材料的太阳能或光反射性,透明性和吸收性的标准试验方法
【标准号】:ASTME1175-1987(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:1987
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E44.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:absorptance;integratingsphere;opticalproperties;photopicproperties;reflectance;solarabsorptance;solarreflectance;solartransmittance;transmittance;Absorption--solarmaterials;Aerospaceapplications;Artificiallight;Corrugatedfibe
【摘要】:Toovercometheinadequaciesofconventionalspectrophotometricmeasurementtechniqueswhennonhomogeneousmaterialsaremeasured,alargeintegratingspheremaybeused.,Sincethebeamemployedinsuchspheresislargeincomparisontothedisparatiesofthematerialsbeingtested,thenonisotropicnatureofthespecimenbeingmeasuredisessentiallyaveraged,orintegratedoutofthemeasurement,inasingleexperimentaldetermination.Solarandphotopicopticalpropertiesmaybemeasuredeitherwithmonofunctionalspheresindividuallytailoredforthemeasurementofeithertransmittanceorreflectance,ormaybemeasuredwithasinglemultifunctionalspherethatisemployedtomeasurebothtransmittanceandreflectance.Amultifunctionalsphereisusedformakingtotalsolartransmittancemeasurementsinbothadirectional-hemisphericalandadirectional-directionalmode.Thesolarabsorptancecanbeevaluatedinasinglemeasurementasoneminusthesumofthedirectionalhemisphericalreflectanceandtransmittance.Whenasampleatthecenterofthesphereissupportedbyitsrim,thesumofthereflectanceandtransmittancecanbemeasuredasafunctionoftheangleofincidence.Thesolarabsorptanceisthenoneminusthemeasuredabsorptanceplustransmittance.1.1Thistestmethodcoversthemeasurementoftheabsolutetotalsolarorphotopicreflectance,transmittance,orabsorptanceofmaterialsandsurfaces.Althoughthereareseveralapplicabletestmethodsemployedfordeterminingtheopticalpropertiesofmaterials,theyaregenerallyusefulonlyforflat,homogeneous,isotropicspecimens.Materialsthatarepatterned,textured,corrugated,orareofunusualsizecannotbemeasuredaccuratelyusingconventionalspectrophotometrictechniques,orrequirenumerousmeasurementstoobtainarelevantopticalvalue.Thepurposeofthistestmethodistoprovideameansformakingaccurateopticalpropertymeasurementsofspatiallynonuniformmaterials.1.2Thistestmethodisapplicabletolargespecimensofmaterialshavingbothspecularanddiffuseopticalproperties.Itisparticularlysuitedtothemeasurementofthereflectanceofopaquematerialsandthereflectanceandtransmittanceofsemitransparentmaterialsincludingcorrugatedfiber-reinforcedplastic,compositetransparentandtranslucentsamples,heavilytexturedsurfaces,andnonhomogeneousmaterialssuchaswovenwood,windowblinds,draperies,etc.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.(Forspecificsafetyhazards,seeNote1.)
【中国标准分类号】:F12
【国际标准分类号】:17_180_20
【页数】:4P.;A4
【正文语种】:英语