ASTM F2156-2006 用方格坐标线斜率测量透明部件中光学失真的标准试验方法
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【英文标准名称】:StandardTestMethodforMeasuringOpticalDistortioninTransparentPartsUsingGridLineSlope
【原文标准名称】:用方格坐标线斜率测量透明部件中光学失真的标准试验方法
【标准号】:ASTMF2156-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:F07.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:航空设备;失真;测量;光学测量;塑料制品;试验方法;透明度;窗;挡风玻璃
【英文主题词】:canopy;distortion;gridboard;gridlineslope;transparency;window;windscreen
【摘要】:Transparentparts,suchasaircraftwindshields,canopies,cabinwindows,andvisors,shallbemeasuredforcompliancewithopticaldistortionspecificationsusingthistestmethod.Thistestmethodissuitableforassessingopticaldistortionoftransparentpartsasitrelatestothevisualperceptionofdistortion.Itisnotsuitableforassessingdistortionasitrelatestopureangulardeviationoflightasitpassesthroughthepart.EitherTestMethodF801orPracticeF733isappropriateandshallbeusedforthislatterapplication.Thistestmethodisnotrecommendedforrawmaterial.1.1Whenanobserverlooksthroughanaerospacetransparency,relativeopticaldistortionresults,specificallyinthick,highlyangled,multilayeredplasticparts.Distortionoccursinalltransparenciesbutisespeciallycriticaltoaerospaceapplicationssuchascombatandcommercialaircraftwindscreens,canopies,orcabinwindows.Thisisespeciallytrueduringoperationssuchastakeoff,landing,andaerialrefueling.Itiscriticaltobeabletoquantifyopticaldistortionforprocurementactivities.1.2Thistestmethodcoverstheapparatusandproceduresthataresuitableformeasuringthegridlineslope(GLS)oftransparentparts,includingthosethataresmallorlarge,thinorthick,flatorcurved,oralreadyinstalled.Thistestmethodisnotrecommendedforrawmaterial.1.3ThevaluesstatedinSIunitsshallberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:V13
【国际标准分类号】:49_020
【页数】:6P.;A4
【正文语种】:
【原文标准名称】:用方格坐标线斜率测量透明部件中光学失真的标准试验方法
【标准号】:ASTMF2156-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:F07.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:航空设备;失真;测量;光学测量;塑料制品;试验方法;透明度;窗;挡风玻璃
【英文主题词】:canopy;distortion;gridboard;gridlineslope;transparency;window;windscreen
【摘要】:Transparentparts,suchasaircraftwindshields,canopies,cabinwindows,andvisors,shallbemeasuredforcompliancewithopticaldistortionspecificationsusingthistestmethod.Thistestmethodissuitableforassessingopticaldistortionoftransparentpartsasitrelatestothevisualperceptionofdistortion.Itisnotsuitableforassessingdistortionasitrelatestopureangulardeviationoflightasitpassesthroughthepart.EitherTestMethodF801orPracticeF733isappropriateandshallbeusedforthislatterapplication.Thistestmethodisnotrecommendedforrawmaterial.1.1Whenanobserverlooksthroughanaerospacetransparency,relativeopticaldistortionresults,specificallyinthick,highlyangled,multilayeredplasticparts.Distortionoccursinalltransparenciesbutisespeciallycriticaltoaerospaceapplicationssuchascombatandcommercialaircraftwindscreens,canopies,orcabinwindows.Thisisespeciallytrueduringoperationssuchastakeoff,landing,andaerialrefueling.Itiscriticaltobeabletoquantifyopticaldistortionforprocurementactivities.1.2Thistestmethodcoverstheapparatusandproceduresthataresuitableformeasuringthegridlineslope(GLS)oftransparentparts,includingthosethataresmallorlarge,thinorthick,flatorcurved,oralreadyinstalled.Thistestmethodisnotrecommendedforrawmaterial.1.3ThevaluesstatedinSIunitsshallberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:V13
【国际标准分类号】:49_020
【页数】:6P.;A4
【正文语种】:
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