Qhov sib txawv tseem ceeb ntawm IR LED thiab photodiode yog qhov tshwm sim ntawm IR LED yog lub teeb, qhov tshwm sim ntawm photodiode yog hluav taws xob tam sim no.
IR LED yog ib qho khoom siv uas tuaj yeem tawm lub teeb nyob hauv thaj tsam ntawm IR ntawm cov hluav taws xob hluav taws xob hluav taws xob. Ib qho photodiode, ntawm qhov tod tes, yog ib qho khoom siv hluav taws xob muaj qhov sib txuas p-n uas tuaj yeem hloov photons rau hauv hluav taws xob tam sim no.
IR LED yog dab tsi?
Ib IR LED tuaj yeem piav qhia raws li cov khoom siv uas tuaj yeem tawm lub teeb nyob rau hauv thaj tsam ntawm IR ntawm electromagnetic radiation spectrum. Cov LEDs no tso cai rau pheej yig, ua tau zoo ntawm IR teeb. Lub teeb no tshwm sim hauv thaj tsam ntawm 700 nm txog 1 hli wavelength.
Daim duab 01: IR LEDs
Muaj ntau siv IR LED, suav nrog hauv hluav taws xob, cov chaw taws teeb tswj rau TV thiab lwm yam khoom siv hluav taws xob, thiab IR koob yees duab. Cov cuab yeej no tuaj yeem ua lub teeb pom kev zoo thaum tseem tsis pom qhov muag liab qab. Ntxiv mus, peb tuaj yeem siv IR LEDs ua ke nrog ntau hom kev sib txawv ntawm cov sensors, uas ua rau lawv dhau los ua ib puag ncig hauv tshuab-rau-tshuab ib puag ncig thiab hauv internet ntawm cov khoom siv.
Feem ntau, muaj IR LEDs emitting 4.5 W ntawm flux nrog 850nm thiab 940 nm variants. Cov no yog hu ua quad die infrared LEDs. Cov no hu ua IR emitters muaj zog tshaj plaws.
Photodiode yog dab tsi?
A photodiode yog ib qho khoom siv hluav taws xob uas muaj p-n sib txuas uas tuaj yeem hloov photons rau hauv hluav taws xob tam sim no. Hauv cov cuab yeej no, p txheej muaj ntau qhov ntau ntawm qhov uas sawv cev rau cov khoom zoo, thaum lub n txheej muaj ntau lub qhov thiab cov hluav taws xob uas tuav cov nqi tsis zoo.
Cov khoom siv no tuaj yeem hloov lub teeb rau hauv hluav taws xob tam sim no. Lub hauv paus ntawm qhov tam sim no los ntawm photons uas yog absorbed hauv photodiode. Cov khoom siv no feem ntau muaj cov lim dej kho qhov muag, lub lens built-in, nrog rau thaj chaw loj lossis me me. Ntxiv mus, lub photodiode feem ntau muaj lub sij hawm teb qeeb dua nrog rau thaj tsam ntau ntxiv. Piv txwv li, ib txwm hnub ci cell uas muaj txiaj ntsig hauv kev tsim hluav taws xob, lub hnub ci zog yog lub photodiode loj.
Daim duab 02: Photodiodes
Cov cuab yeej no zoo ib yam li cov khoom siv hluav taws xob tsis tu ncua, tab sis lawv raug nthuav tawm lossis ntim nrog kev sib txuas ntawm fiber ntau kom tso cai rau lub teeb kom ncav cuag cov khoom rhiab heev.
A photodiode tuaj yeem piav qhia raws li tus qauv PIN ntawm p-n junction. Thaum ntaus ib daim duab nrog lub zog txaus, nws tuaj yeem ua rau kev tsim ntawm ib qho hluav taws xob-qhov khub. Peb hu qhov no mechanism lub puab photoelectric nyhuv. Yog tias qhov nqus ntawm lub teeb tshwm sim ntawm thaj tsam depletion ntawm txoj kev sib tshuam, cov khoom siv hluav taws xob cheb los ntawm kev sib tshuam los ntawm cov txiaj ntsig ntawm lub zog hluav taws xob hauv cheeb tsam depletion. Qhov no ua rau kev txav ntawm qhov mus rau lub anode thiab electrons ntawm cathode. Tom qab ntawd lub photocurrent yog tsim. Peb tuaj yeem muab tag nrho tam sim no los ntawm photodiode raws li cov lej ntawm qhov tsaus ntuj tam sim no.
Qhov txawv ntawm IR LED thiab Photodiode yog dab tsi?
Ob leeg IR LEDs thiab photodiodes yog cov khoom siv hluav taws xob tseem ceeb. Lawv muab cov txiaj ntsig sib txawv siv qhov sib txawv. Qhov sib txawv tseem ceeb ntawm IR LED thiab photodiode yog qhov tshwm sim ntawm IR LED yog lub teeb, qhov tshwm sim ntawm photodiode yog hluav taws xob tam sim no.
Cov hauv qab no qhia txog qhov sib txawv ntawm IR LED thiab photodiode hauv daim ntawv teev npe rau kev sib piv ntawm ib sab.
Summary – IR LED vs Photodiode
IR LED yog ib qho khoom siv uas tuaj yeem tawm lub teeb nyob hauv thaj tsam ntawm IR ntawm cov hluav taws xob hluav taws xob hluav taws xob. Lub photodiode yog ib qho khoom siv semiconductor uas muaj qhov sib txuas p-n uas tuaj yeem hloov photons rau hauv hluav taws xob tam sim no. Qhov sib txawv tseem ceeb ntawm IR LED thiab photodiode yog qhov tshwm sim ntawm IR LED yog lub teeb, qhov tshwm sim ntawm photodiode yog hluav taws xob tam sim no.
