What is SWIR? | Edmund Optics

Short-wave infrared (SWIR) defines a specific wavelength range over which optical and electronic components are designed and coated. SWIR ... HowmayIhelpyou? Engineersareavailabletoassist. Ouroperatorsarenotavailableatthemoment.Pleaseleaveamessageandwewillcontactyousoon Leaveamessage HappyHolidaysfromEdmundOptics!Pleasenoteourspecialopeninghours.      CHAT    EMAIL Country/Region Wehavesetyourcountry/regiontoUnitedStates Youcanchangethisselectionatanytime,butproductsinyourcart,savedlists,orquotemayberemovediftheyareunavailableinthenewshippingcountry/region. 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Welcome! MyAccount AccessDashboard MyProfile UpdateMyProfile Payment&Shipping AddressBook, TaxCertificates WebOrders ViewPastOrders SavedLists SavedItemsforLater LogOut    Products Capabilities KnowledgeCenter Company ContactUs  MyAccount  Cart   hasbeenaddedtoyourcart. OrderNumberhasbeenaddedtoyourcart. Allitemshavebeenaddedtoyourcart. hasbeenaddedtoyourcomparelist. Productaddedtocart KnowledgeCenter /ApplicationNotes /Imaging /WhatisSWIR? WhatisSWIR? http://www.edmundoptics.com/knowledge-center/application-notes/imaging/what-is-swir/ EdmundOpticsInc. http://www.edmundoptics.com WhatisSWIR? Short-waveinfrared(SWIR)lightistypicallydefinedaslightinthe0.9–1.7μmwavelengthrange,butcanalsobeclassifiedfrom0.7–2.5μm.Sincesiliconsensorshaveanupperlimitofapproximately1.0μm,SWIRimagingrequiresuniqueopticalandelectroniccomponentscapableofperforminginthespecificSWIRrange.Indiumgalliumarsenide(inGaAs)sensorsaretheprimarysensorsusedinSWIRimaging,coveringthetypicalSWIRrange,butcanextendaslowas550nmtoashighas2.5μm.Althoughlinearline-scaninGaAssensorsarecommerciallyavailable,area-scaninGaAssensorsaretypicallyITARrestricted.ITAR,InternationalTreatyandArmsRegulations,isenforcedbythegovernmentoftheUnitedStatesofAmerica.ITARrestrictedproductsmustadheretostrictexportandimportregulationsforthemtobemanufacturedand/orsoldwithinandoutsideoftheUSA.Nevertheless,lensessuchasSWIRonescanbeusedforanumberofcommercialapplicationswithproperlicenses. Figure1:ElectromagneticSpectrumIllustratingSWIRWavelengthRange WHYUSESWIR? UnlikeMid-WaveInfrared(MWIR)andLong-WaveInfrared(LWIR)light,whichisemittedfromtheobjectitself,SWIRissimilartovisiblelightinthatphotonsarereflectedorabsorbedbyanobject,providingthestrongcontrastneededforhighresolutionimaging.Ambientstarlightandbackgroundradiance(nightglow)arenaturalemittersofSWIRandprovideexcellentilluminationforoutdoor,nighttimeimaging. Itisessentialtousealensthatisdesigned,optimized,andcoatedfortheSWIRwavelengthrange.Usingalensdesignedforthevisiblespectrumwillresultinlowerresolutionimagesandhigheropticalaberrations.SinceSWIRwavelengthstransmitthroughglass,lenses,andotheropticalcomponents(opticalfilters,windows,etc.)designedforSWIRcanbemanufacturedusingthesametechniquesusedforvisiblecomponents,decreasingmanufacturingcostandenablingtheuseofprotectivewindowsandfilterswithinasystem. AlargenumberofapplicationsthataredifficultorimpossibletoperformusingvisiblelightarepossibleusingSWIR.WhenimaginginSWIR,watervapor,fog,andcertainmaterialssuchassiliconaretransparent.Additionally,colorsthatappearalmostidenticalinthevisiblemaybeeasilydifferentiatedusingSWIR. SWIRAPPLICATIONS SWIRimagingisusedinavarietyofapplicationsincludingelectronicboardinspection,solarcellinspection,produceinspection,identifyingandsorting,surveillance,anti-counterfeiting,processqualitycontrol,andmuchmore.TounderstandthebenefitsofSWIRimaging,considersomevisualexamplesofcommon,everydayproductsimagedwithvisiblelightandwithSWIR. ROLLOVERtoSeeSWIRImage Figure2a:VisibleImagingofRedApple.NoticetheAppleLooksPerfectlyRedwithVisibleImaging.DefectsareNotEasilyDiscernable. ROLLOVERtoSeeSWIRImage Figure2b:SWIRImagingofRedApple.BruisingisClearlyEvidentontheApplewithSWIRImaging.ItisEasytoInspectAnyDefectsontheSkin. ROLLOVERtoSeeSWIRImage Figure3a:VisibleImagingofBabyPowderBottle.NoticetheBottleLooksWhiteandGlossywithVisibleImaging.ThePowderwithinisnotDiscernableatAll. ROLLOVERtoSeeSWIRImage Figure3b:SWIRImagingofBabyPowderBottle.TheBottleisTransparenttoSWIRWavelengths.ItisEasytoSeetheAmountofPowderWithin.   ROLLOVERtoSeeSWIRImage Figure4a:TheLastJudgmentbyJanProvostandimagedintheSWIRwavebandbytheDetroitInstituteofArtsdetailstheartist'soriginalintentionbycarefullyexaminingtheunderdrawingwhichliesbeneaththepaintfilm.ImagecopyrightbyDetroitInstituteofArts.Usedwithpermission. ROLLOVERtoSeeSWIRImage Figure4b:Onecansee10trumpetsunderneaththearchangelversusthe5trumpetsthatwereactuallypainted.Theplacementofthepaintedtrumpetsappearstohavenecessitatedarepositionofthesailingvessel.Thetoesontopoftheglobewerealsonotpaintedinthesamelocationastheoriginalunderdrawing.ImagecopyrightbyDetroitInstituteofArts.Usedwithpermission. ROLLOVERtoSeeSWIRImage Figure5a:BountifulFruitpaintedbyPhiladelphiaartistNicoleKoenitzerdetailstheplanningprocessofanartistwhencreatinganoilpainting.ByexaminingthepaintingintheSWIRwavebandonecanfollowtheartist'sthoughtprocessfrominitialsketchtopaintingandrefinementoffinishedwork. ROLLOVERtoSeeSWIRImage Figure5b:Asyoucansee,thepaintingoriginallyincludedbananasandaframethatwereomittedfromthefinalimage.Alongthelowerrightthereappearstobeblotchesofpaintnotseeninthevisiblewaveband.Perhapstheartistbeganpaintingthebackgroundwithdifferentmaterialsorchangedhermindandtouchedupthepaintingatalaterdate. Short-waveinfrared(SWIR)definesaspecificwavelengthrangeoverwhichopticalandelectroniccomponentsaredesignedandcoated.SWIRimagingoffersanumberofadvantagescomparedtovisiblewhenusedforinspection,sorting,surveillance,qualitycontrol,andhostofotherapplications.Itisimportanttochoosecomponentsspecificallydesigned,optimized,andcoatedfortheSWIRwavelengthrangetoensurethehighestresolutionandlowestaberrations.ManufacturerslikeEdmundOpticsareexperiencedindesigning,manufacturing,andcoatingSWIRSerieslenses.EdmundOpticsofferslensassembliesdesignedwithglassesthatareoptimizedforperformanceintheSWIRspectrum,andanti-reflection(AR)coatingsforSWIRspeciallydesignedformaximumtransmissionofSWIRwavelengths.ViewtheSWIRImagingApplicationspagetolearnmoreaboutwhatEdmundOpticscandoforyouandanswerthequestion"CanYouSeeBeyondtheVisible?" Wasthiscontentusefultoyou? Thankyouforratingthiscontent! RequestanImagingOpticsCatalog Withover800ImagingLensesand40pagesofindepthTechnicalContent,makeEdmundOpticsYourPartnerinImagingOptics. TheCorrectMaterialforInfrared(IR)Applications Withtheincreasedpopularityofinfraredmaterialsintheopticsindustry,stayup-to-datebylearninghowtochoosethecorrectone. ImagingLenses Telecentric,fixedfocallength,micro-video,fixedmagnification,variablemagnification,orzoomlensesavailable.Highresolutionorlargeformatdesignstocoveryoursensor. SWIRImaging:CanYouSeeBeyondtheVisible? SeethedifferencealensdesignedandcoatedforSWIRmakesinelectronicboardinspection,surveillance,orprocessqualitycontrol. 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