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Shortwave Infrared (SWIR) Imaging Aids Laser Tracking, Detection

Shortwave Infrared (SWIR) Imaging Aids Laser Tracking, Detection

Raws li kev ua tsov ua rog dhau los ua qhov tsis sib xws, cov pej xeem thiab lwm cov neeg tsis sib ntaus sib tua dhau los ua ib feem pua ​​​​ntawm cov neeg raug tsim txom, nrog rau cov khoom ntiag tug uas tsis xav tau kev puas tsuaj.Cov tub rog, tau kawg, vam tias yuav zam tau cov hom kev raug mob thiab kev puas tsuaj.Nrog rau kev siv thev naus laus zis uas ua kom muaj qhov tseeb ntau dua los ntawm lawv cov riam phom, lawv kuj xav tau kev taw qhia zoo dua thiab lub hom phiaj muaj peev xwm, thaum tseem tshuav.Txhim kho lub hom phiaj thev naus laus zis uas tso cai rau kev tshawb nrhiav thiab kev txheeb xyuas ntawm qhov ntev standoff nrug los ntawm cov neeg tsim qauv kuj xav tau.Piv txwv li, lasers yog zoo heev ntawm precision taw tes, tab sis nws yog ib qho tseem ceeb uas lwm tus yuav tsum tau covertly duab lub scene thiab.

Txhawm rau daws cov teeb meem kev sib tw no, cov tub rog tau siv cov lasers uas tso cai rau lawv tsis tsuas yog xaiv lub hom phiaj uas cov foob pob hluav taws yuav tsum ntaus, tab sis siv cov lasers tib yam los ntsuas qhov deb ntawm lub hom phiaj, teeb pom kev thaj chaw ib puag ncig, lossis taw qhia rau lwm tus. ntawm kev txaus siab.Kev pom qhov twg lub lasers yog taw tes, taug qab lub hom phiaj txav, thiab txo qis qhov kev puas tsuaj yuav tsum tau siv cov duab uas pom cov lasers nquag siv hauv thaj teb.Chav ntsuas kub indium gallium arsenide (InGaAs) cov koob yees duab muab cov neeg siv lub peev xwm no nyob rau nruab hnub lossis hmo ntuj.

Feem ntau cov riam phom uas siv laser yog qhia los ntawm lasers nrog lub wavelength ntawm 1.06 μm.Cov lasers no muaj zog heev thiab lawv tuaj yeem siv los taw tes ntawm cov khoom ntau mais deb.Qhov kev ncua deb yog txwv ntau los ntawm qhov tseeb npaum li cas tus neeg siv tuaj yeem pom qhov nws tau tsim.Qhov no suav nrog qhov chaw laser, lub hom phiaj, thiab cov khoom nyob ib puag ncig lub hom phiaj.Tam sim no, feem ntau cov tshuab siv ib qho indium antimonide (InSb) detector array los duab qhov chaw.Cov txheej txheem InSb no tau thinned kom tso cai rau cov lus teb mus rau 1.0 μm laser wavelength, uas nyob deb ntawm qhov qub InSb ncov siab ntau yam (nruab nrab ntawm 3 thiab 5 μm).Qhov ntau yog siv rau nws daim ntawv thov tseem ceeb ua ib nrab-yoj IR thermal detector.

InSb cov koob yees duab tso cai rau lub laser infrared pom thiab lawv muab cov xwm txheej kev paub txog ib puag ncig ntawm lub laser vim yog thermal emissions ntawm qhov chaw.Qhov tsis zoo ntawm cov tshuab no yog tias lub ntsuas ntsuas xav tau qhov txias txias (txog 77K) thiab lawv qhov kev nkag siab zoo rau 1.06-μm lasers tsis zoo, vim 70% thiab chav ua haujlwm kub.Lawv ua kom pom cov duab laser me ntsis ntawm qhov kev sib tw ntau dua nrog lub zog sib dua.

Shortwave Infrared (SWIR) Imaging Aids Laser Tracking, Detection

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Lasers tsis yog tsuas yog siv los coj cov foob pob hluav taws rau lawv lub hom phiaj, tab sis kuj tuaj yeem muab cov ntaub ntawv ntawm lub hom phiaj thiab qhov chaw nyob ib puag ncig.Laser range finders tso cai rau tus neeg siv los txiav txim qhov kev ncua deb mus rau lub hom phiaj.Cov lasers tam sim no siv qhov kwv yees li 1.5-μm wavelength.Qhov no wavelength yog suav hais tias yog "qhov muag-kev nyab xeeb" vim hais tias lub zog tsis tsom rau ntawm lub qhov muag retina, thiab lub hwj chim kho qhov muag xav tau rau qhov muag tsis pom ib tug neeg ntaus los ntawm lub laser yog siab heev.Cov lasers no tsis pom qhov pom kev hmo ntuj tsom iav (NVGs) nrog rau lub qhov muag, yog li ua rau lawv tsim nyog zais.Qhov kom zoo dua yog tias lub hom phiaj tsis paub tias lawv raug cim los ntawm laser;lub downside yog hais tias tus warfighter kuj muaj teeb meem paub yog hais tias nws yog raug aimed ntawm lub hom phiaj.Vim InGaAs kuj tseem ceeb heev rau lub qhov muag-kev nyab xeeb lasers, SWIR imaging InGaAs cov koob yees duab tau raug xa mus kom cov tub rog tuaj yeem tshawb xyuas tias lawv lub hom phiaj tseem tsis tau pom tseeb, txawm tias lub kaw lus tau raug ntaus hauv thaj teb.

Lub laser ntau tshaj plaws nyob rau hauv kev sib ntaus sib tua yog ib qho txuas nrog tub rog rab phom, thiab feem ntau siv lub wavelength nyob ib ncig ntawm 850 nm.Lub laser pointer no yog siv los ntawm cov tub rog los taw qhia lub hom phiaj rau ib leeg, nrog rau kev pab txhawm rau tsom lawv cov phom ntev hmo ntuj thaum lawv hnav NVGs.Cov lasers no pom tsis tau rau tib neeg, tab sis pom ntawm lub tsom iav.Cov phom lasers tsis muaj qhov muag tsis pom kev thiab lawv tuaj yeem ntes tau siv ntau hom kev ntes cov thev naus laus zis, qub thiab tshiab.Qhov teeb meem loj tshaj plaws yog tias thaum cov tub rog xav tau qhov zoo tshaj plaws NVGs kom pom ntxiv thiab thaum tsaus ntuj thaum hmo ntuj, cov yeeb ncuab yooj yim tuaj yeem ntes cov lasers nrog cov qub thiab pheej yig hmo ntuj tsom iav tsom iav.InGaAs cov duab muaj qhov zoo sib xws ntawm ob qho tib si rov qab-tshaj, raws li lawv cov duab cov lasers qub siv nrog NVGs, ntxiv rau lawv muaj peev xwm ua duab "qhov muag zoo" thiab cov tshuab laser tiam tom ntej.

Ib lub koob yees duab SWIR uas tau tsim tshwj xeeb rau Asmeskas Tub Rog Tub Rog Mobility thiab Rifle Targeting System, SUI's KTX Lub Koob Yees Duab nta cov rhiab heev nyob rau hauv 900 mus rau 1700 nm wavelength ntau yam thiab tuaj yeem siv ntau yam kev ua haujlwm qis qis, suav nrog laser. kuaj pom.Nrog rau cov duab dynamic ntau yam nyob rau hauv ib nrab hnub qub rau lub teeb pom kev ncaj qha hnub ci, SWIR imager yog qhov zoo tshaj plaws rau kev soj ntsuam cov ntaub ntawv thiab tuaj yeem ua ke tau yooj yim rau hauv UAVs, tsheb tsis muaj neeg tsav tsheb, lossis lwm yam khoom siv neeg hlau lossis cov khoom siv tes uas qhov loj thiab qhov hnyav yog qhov tseem ceeb.

Nyob rau hauv tiam tom ntej imaging systems, lasers tsis tsuas yog yuav txiav txim lub hom phiaj qhov deb, piv txwv li laser range finders, tab sis lawv yuav tso cai rau ntev-ntev duab los ntawm obscuring pos huab, haze, thiab plua plav.LADAR thiab ntau-gated duab siv lub laser los teeb lub hom phiaj ntawm qhov deb.Qhov kev sib tw ntev ntev no tso cai rau tus neeg tua rog los txheeb xyuas lub hom phiaj ntawm qhov ntev nyob rau hauv txhua qhov teeb pom kev zoo thiab txawm tias los ntawm huab cua thiab pa taws.

Feem ntau cov tshuab tam sim no nyob rau hauv txoj kev loj hlob yog siv 1.5-μm lasers rau qhov muag kev nyab xeeb vim li cas thiab vim hais tias lawv kuj yog covert rau tam sim no NVG technology, uas tau proliferated rau hauv cov yeeb ncuab tes.Ntau yam ntawm cov txheej txheem tom ntej no tau tsim nrog chav ntsuas kub InGaAs arrays kom txuag tau qhov hnyav, lub zog, thiab qhov loj ntawm lub cev.Cov kev txhim kho no ua ke nrog cov yam ntxwv siab ntawm InGaAs-SWIR detectors, muab kev ua tau zoo dua qub nrog rau cov xwm txheej zoo rau cov neeg siv kawg thiab cov neeg tsis muaj txim txhaum.

Kab lus no tau sau los ntawm Dr. Martin H. Ettenberg, Tus Thawj Coj, Cov Khoom Siv Duab, thiab Doug Malchow, Tus Thawj Saib Xyuas Kev Lag Luam Kev Lag Luam ntawm SUI (Sensors Unlimited, Inc.), ib feem ntawm Goodrich Corporation, Princeton, NJ.

 

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Lub Sijhawm Hloov Kho: Plaub Hlis-01-2022