【英文标准名称】:StandardTestMethodfortheAutomatedDeterminatonofRefractiveIndexofGlassSamplesUsingtheOilImmersionMethodandaPhaseContrastMicroscope
【原文标准名称】:用油浸法和相衬显微镜自动测定玻璃样品的折射指数的标准试验方法
【标准号】:ASTME1967-1998(2003)
【标准状态】:现行
【国别】:
【发布日期】:1998
【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】:E30.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:折射指数;玻璃比对;玻璃测量
【英文主题词】:glasscomparisions;glassmeasurement;refractiveindex
【摘要】:Thistechniquemodifiesthesample,inthattheglassfragmentmustbecrushed,ifitistoolarge,andimmersedinoilfortheanalysis.Somesamplehandling,however,wouldenabletheanalysttorecoverthesampleinthecrushedform,ifnecessary.Thistestmethodisusefulforaccuratemeasurementofx03B7;Dtfromawidevarietyofglasssamples,wheremostglassesofinteresthavex03B7;Dtintherangebetween1.48x2013;1.55inx03B7;Dtunits.Theobjectivenatureofthematchpointdeterminationallowsforabetterstandardizationbetweenlaboratories,andtherefore,allowsfortheinterchangeofdatabasesbetweenlaboratories.Itshouldberecognizedthatsurfacefragments,especiallyfromfloatglasssamples,canresultinx03B7;Dt,smeasurablyhigherthanfragmentsfromthebulkofthesamesource(5).Theprecisionandbiasofthistestmethodshouldbeestablishedineachlaboratorythatemploysit.Confidenceintervalsorasimilarstatisticalqualitystatementshouldbequotedalongwithanyreportedx03B7;Dtvalue.Forinstance,alaboratorymayreportthattheerrorforthemeasurement,usingareferenceopticalglassis0.00003units.Itshouldberecognizedthatthistechniquemeasurestherefractiveindexoftheglassatthematchpointtemperature,whichwillbehigherthanambienttemperature,andthus,maygivedifferentx03B7;Dtvaluesfromthoseobtainedbyothermethods,whichmeasuretherefractiveindexatroomtemperature.1.1Thistestmethodcoversaprocedureformeasuringtherefractiveindex(951;955;t)ofglasssamples,irregularlyshapedandassmallas300956;g,forthecomparisonoffragmentsofaknownsourcetorecoveredfragmentsfromaquestionedsource.1.2Thistestmethoddoesnotincludethemeasurementofopticaldispersionorthemeasurementofrefractiveindex(951;955;t)atanyotherwavelengthotherthantheSodiumDline(951;Dt).Thismethodemploysanarrowbandpassfilterat589nm,butotherfilterscouldbeemployedusingthedescribedmethodandallowingthe951;955;ttobedeterminedatotherwavelengths,therefore,alsoallowingforthedispersionvaluetobecalculated.1.3Alternativemethodsforthedeterminationof951;955;tarelistedinRefs(1-5).1.4Thisstandardtestmethoddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheusertoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:N32
【国际标准分类号】:81_040_01
【页数】:3P.;A4
【正文语种】:
基本信息
| 标准名称： | 拧入式四通管接头 |
| 中标分类： |
航空、航天 >>
航空器与航天器零部件 >>
管件、卡箍、密封件 |
| 替代情况： | HB 4-30-1976;被HB 4-30-1999代替 |
| 发布日期： | 1984-08-23 |
| 实施日期： | 1984-10-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 3页 |
适用范围
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前言
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引用标准
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所属分类： 航空 航天 航空器与航天器零部件 管件 卡箍 密封件