ASTM E809-2008 测量反光境的光度特性的标准实施规程

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【英文标准名称】:StandardPracticeforMeasuringPhotometricCharacteristicsofRetroreflectors
【原文标准名称】:测量反光境的光度特性的标准实施规程
【标准号】:ASTME809-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:E12.10
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:photometriccharacteristics;photometricmeasurements;photometricrange;retroreflective;retroreflection;retroreflectors;Color--retroreflection/retroreflectors;Spectrophotometry--goniophotometry;Lighttransmissionandreflection;Photometry;Retrore
【摘要】:Thispracticedescribesproceduresusedtomeasurephotometricquantitiesthatrelatetothevisualperceptionofretroreflectedlight.Themostsignificantusageisintherelationtothenighttimevehicleheadlamp,retroreflector,anddriver''seyegeometry.ForthisreasontheCIEStandardSourceAisusedtorepresentatungstenvehicleheadlampandthereceptorhasthephotopic,V(x03BB;),spectralresponsivitycorrespondingtothelightadaptedhumaneye.Althoughthegeometrymustbespecifiedbytheuser,itwill,ingeneral,correspondtotherelationbetweenthevehicleheadlamp,theretroreflector,andthevehicledriver''seyeposition.1.1Thispracticedescribesthegeneralproceduresforinstrumentalmeasurementofthephotometriccharacteristicsofretroreflectivematerialsandretroreflectivedevices.1.2ThispracticeisacomprehensiveguidetothephotometryofretroreflectorsbutdoesnotincludegeometrictermsthataredescribedinPracticeE808.1.3Thispracticedescribestheparametersthatarerequiredwhenstatingphotometricmeasurementsinspecifictestsandspecificationsforretroreflectors.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:N35
【国际标准分类号】:17_180_20
【页数】:11P.;A4
【正文语种】:英语