Light Guide Data｜ MORITEX Corporation

The minimum bend radius of optical fiber light guides is mainly determined by the tube bend radius, but is also affected by factors such as the optical ... Global Japanese Chinese HOME Products&Applications AboutUs Worldwide Press&Events Careers Contact Home Products&Applications MachineVision LightSourcesandFiberOpticLightGuides LightGuideData Mechanical/EnvironmentalCharacteristics MechanicalCharacteristics MinimumBendradius Theminimumbendradiusofopticalfiberlightguidesismainlydeterminedbythetubebendradius,butisalsoaffectedbyfactorssuchastheopticalfiberbundlediameterandopticalfiberbundlelength.Excessivebendingofanopticalfiberlightguidecancausewavelengthlossorbreakoftheopticalfiber,etc.,whichmayresultinadropinthetransmittedlightintensity,leadingtopoorperformance. Notethatopticalfiberswiththerandomarrangementspecificationwillhavealargerminimumbendradiusthanstandardopticalfiberbundles. RepeatedBendResistance Repeatedlybendingopticalfiberlightguidescancausefibertwisting,frictionbetweenfibers,andfrictionbetweenfibersandthetube(theopticalfiberbundlecovering).Thiscanresulttoopticalfiberbreaksordeterioration,causingadropinthetransmittedlightintensityandperformance. Anopticalfiberlightguide'sabilitytowithstandrepeatedbendingvariesbyfibertype.Multicomponentglassfibersgenerallyhavelessrepeatedbendresistancethanplasticfibers.Notethatopticalfiberswiththerandomarrangementspecificationwillhavelessrepeatedbendresistancethanstandardopticalfiberbundles. Ifyourequirehighdurability,useabend-resistantlightguide(availablebyspecialorder)withacustomizedinternalstructureandspecialcoating. EnvironmentalCharacteristics HeatResistance Theheatresistanceofbareopticalfibersvariesbymaterial,withavalueof70°Cforplastic,430°Cformulticomponentglass(excludingthelubricant),andover1000°Cforquartz(excludingthecovering).Themaximumheatresistancetemperatureoflightguideendfaceswillbedeterminedbytheheatresistanceoftheadhesive,opticalfiberprotectivecoatingandcoveringinuse.Thevalueis70°Cforplastic,200°Cformulticomponentglass,and200°Cforquartz.Forapplicationsrequiringhighendfaceheatresistance,useaheat-resistantlightguide(multicomponentglassorquartztypesheatresistantupto300°Careavailablebyspecialorder). Quartzmodelsheatresistantupto500°Careavailableforapplicationsrequiringevenhigherheatresistance.Thelifeofbareopticalfiberswillvarydependingontheoperatingtemperature,andtheexistence,degreeanddurationofanytemperaturevariationspresent.Ifyouintendtousetheproductinanonstandardenvironment,inquirefordetailsbeforepurchase. HeatResistanceTemperatures OpticalFiberType HeatResistanceTemperatureofaBareFiberonly(℃) EndFaceHeatResistanceTemperatureofStandardTypes(℃) EndFaceHeatResistanceTemperatureofHeat-ResistantTypes(℃) Plastic 70 70 － Multicomponentglass 430(excludinglubricant) 200 300 Quartz Over1,000(excludingcovering) 200 300,500 HumidityResistance,EaterResistance Opticalfibersdonothaveverygoodhumidityorwaterresistance.Forapplicationsrequiringhumidity-orwaterresistance,useaspecial-typelightguide(availablebyspecialorder;multicomponentglassfiberonly). Thediagramontherightshowstheresultofanautoclavetest.(Asingletestcycleconsistedof20minutesatatemperatureof132°C,humidityof100%,andpressureof2kg/cm2,followedbyareductionintemperature,humidityandpressuretotheambientconditions.) Transmissivity/LuminousIntensityDistributionCharacteristics BareOpticalFiberData Material MulticomponentGlass Plastic Quartz FiberDiameter 50µm 250µm500µm750µm 1,000µm2,000µm 208µm(andseveralothervalues) CoreDiameter 45µm (3to5µmlessthanfiberdiameter) 200µm ApertureAngle Approx.70° Approx.60° Approx.25° EndFace HeatResistanceTemperature*1 Standardtype 200℃ Standardtype 70℃ Standardtype 200℃ Special-ordertype 300℃ Special-ordertype 500℃ BendingResistance Δ ○ × HeatResistance ○ × ○ Transmissivity*2 (Visiblelight;shortdistance) Δ Δ ○ Price ○ ○ × ○:OutstandingΔ:Problematicundersomeconditions　×:Unsuitableundersomeconditions Theseratingsareonlyintendedasgeneralguidelines.Inquireformoreinformation. *1:Dataforbundledfibers(notbarefibers) *2:Transmissivityuptodistanceof10meters DistributionCharacteristicforLightGuidewithHalogenLightSource RelationshipbetweenLightGuideLengthandTransmissivity Luminousintensitycharacteristicforringlightguide(example) Luminousintensitycharacteristicforlinelightguide(example) Lightguidespectraltransmissivity CharacteristicsofQuartzFibersforUV/VisibleRange Fiberfilamentspecifications NumericalAperture(NA)andStructuralDimensions NA 0.22±0.02 Diameter Core(µm) 200±3 Cladding(µm) 208±3 PrimaryCovering(µm) 240±10 Minimumbendradius 20 Material Core PureSiO2 Cladding SiO2withfluorine Caution:Fiberdiameters(core/cladding)maychangewithoutpriornotice. Benefits Largequantityofhydroxide(OH)ionsmakesproductswelladaptedtoUVtransmission. Streamlinedproductionmethodsenablelowprices. ProvidestabletransmissivityduringextendeduseasUVlightguides. Supporti,gandhbeamuse. Rigorousqualitycontrolinareassuchastransmissionperformanceanddimensionalprecisioncreatesproductsthatmakeiteasytoprocessgood-qualityitemswithlittlevariation. Enableawiderangeoffiberprocessingapplicationsbydrawingonthetechnologies,experienceandexpertiseMORITEXhasaccumulatedovermanyyears. (ProductsforKrFexcimerlaserscanbemadetoorderasspecial-orderitems.) ApplicationExamples LightguidesforUVspotlightsources High-performancelightguidesforsemiconductorsandLCexposureequipment. 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