Dab tsi yog lub luag haujlwm tseem ceeb ntawm diodes hauv cov khoom siv kho mob?

1, Optoelectronic hloov dua siab tshiab: "pob paj hlwb" ntawm kev kho mob duab
Hauv siab -cov khoom siv kho mob kawg xws li X-rays, CT, MRI, thiab lwm yam, photodiode array yog lub hauv paus tseem ceeb ntawm lub tshuab ntes, lub luag haujlwm tseem ceeb ntawm kev hloov kho qhov muag teeb liab rau hauv cov teeb liab hluav taws xob. Noj X-ray duab ua piv txwv, thaum X-rays nkag mus rau tib neeg cov ntaub so ntswg, cov ntaub so ntswg sib txawv (xws li cov pob txha thiab cov nqaij mos) muaj qhov sib txawv ntawm kev nqus ntawm X-rays, ua rau tsis sib xws ntawm lub teeb siv thaum irradiated mus rau photodiode array. Photodiodes hloov cov teeb liab siv lub teeb rau hauv cov teeb liab tam sim no los ntawm cov nyhuv photoelectric, thiab lawv qhov rhiab heev cuam tshuam rau lub teeb liab - rau - suab nrov piv ntawm daim duab. Piv txwv li, hauv CT scanning, photodiodes nyob rau hauv lub ntes yuav tsum ua kom tiav cov teeb liab kho qhov muag tau txais thiab hloov dua siab tshiab hauv microseconds kom ntseeg tau tias synchronization ntawm qhov siab -ceev tig X-ray raj thiab lub detector array, thaum kawg tsim siab - daws teeb meem tomographic dluab.

Txawm hais tias MRI cov cuab yeej tso siab rau cov chaw sib nqus thiab cov xov tooj cua zaus raws li nws qhov tseem ceeb, photodiodes tseem ua lub luag haujlwm tseem ceeb hauv kev pabcuam. Piv txwv li, nyob rau hauv kev tswj lub teeb pom kev zoo ntawm MRI cov chav kuaj, photodiodes tuaj yeem paub qhov siv ntawm lub teeb pom kev zoo, tuaj yeem kho qhov ci ntawm LED teeb pom kev zoo, zam lub teeb muaj zog cuam tshuam nrog cov hlau nplaum sib nqus, thiab txhim kho cov neeg mob kev nplij siab. Tsis tas li ntawd, nyob rau hauv gradient coil tsav Circuit Court ntawm MRI, qhov ceev rov qab diode (FRD) zoo suppresses lub zog rov qab electromotive los ntawm kev ua thiab txiav tawm sai, tiv thaiv cov khoom siv hluav taws xob los ntawm qhov hluav taws xob poob siab thiab ua kom muaj kev tswj xyuas meej ntawm gradient magnetic teb.

2, Kev ua cov teeb liab: "cov ntaub ntawv chaw" ntawm kev kuaj mob
Hauv cov khoom siv tshuaj ntsuam xyuas hauv vitro xws li cov ntsuas ntshav thiab cov tshuaj biochemical detectors, diodes ua tiav cov kev soj ntsuam ntawm cov cell tsis thiab cov ntsuas biochemical los ntawm cov thev naus laus zis xws li lub teeb tawg thiab kuaj pom fluorescence. Ua ib qho piv txwv ntawm cov ntshav ntsuas ntshav, thaum cov ntshav kuaj dhau los ntawm kev kuaj pom, lub photodiode array pom cov teeb liab tawg ntawm cov hlwb los ntawm ntau lub kaum ntse ntse. Ua ke nrog cov yam ntxwv ntawm lub teeb nqus, cov cim tseem ceeb xws li cov ntshav liab suav thiab cov qe ntshav dawb tuaj yeem txheeb xyuas. Piv txwv li, ib qho qauv ntawm cov tshuaj ntsuam ntshav siv silicon photodiodes nrog cov lus teb wavelength ntau yam npog 400-1100nm, uas tuaj yeem tshawb pom lub teeb tawg mus rau pem hauv ntej (FSC), sab tawg tawg (SSC), thiab cov teeb liab fluorescence, ua tiav tsib pawg kuaj ntshav dawb nrog qhov tseeb ntawm ntau dua 99%.

Hauv kev sim tshuaj biochemical, diodes ua tiav qhov kev soj ntsuam ntau los ntawm kev kuaj xyuas cov kev hloov pauv hauv fluorescence lossis lub teeb haum uas tsim los ntawm cov tshuaj tiv thaiv enzymatic. Piv txwv li, hauv kev kuaj ntshav qabzib, cov piam thaj tsim cov hydrogen peroxide nyob rau hauv qhov kev txiav txim ntawm qabzib oxidase, uas cuam tshuam nrog reagents los tsim cov tshuaj fluorescent. Kev hloov pauv fluorescence raug kuaj pom los ntawm photodiode, thiab cov ntshav qabzib concentration yog xam raws li tus qauv nkhaus. Hauv cov ntawv thov no, cov kab lus teb kab thiab cov yam ntxwv tsis tshua muaj suab nrov ntawm diodes yog qhov tseem ceeb. A certain model of avalanche photodiode (APD) uses an internal gain mechanism to increase detection sensitivity to the single photon level, which can detect biochemical substances at nanomolar concentrations and provide a basis for early disease diagnosis.

3, Kev Tswj Xyuas Hluav Taws Xob: Lub 'Energy Cornerstone' ntawm Cov Khoom Siv Kho Mob
Hauv kev kho mob fais fab, diodes ua kom ruaj khov ntawm cov khoom siv hauv cov khoom siv hluav taws xob hauv cov khoom siv hluav taws xob los ntawm kev ua haujlwm xws li rectification, voltage regulation, thiab tam sim no limiting. Noj cov tshuaj kho mob X-ray tshuab ua piv txwv, lawv cov high-voltage generators yuav tsum tau hloov AC fais fab mus rau kaum kilovolts ntawm DC high voltage tsav lub X-ray raj los tsim X-rays. Thaum lub sijhawm txheej txheem no, lub siab -voltage diode array tsim ib tug tag nrho nthwv dej rectifier choj, converting AC voltage rau hauv pulsating DC, uas yog ces smoothed los ntawm ib tug filtering circuit kom tso tawm ib tug ruaj khov high voltage. Piv txwv li, ib qho qauv ntawm high -voltage diode siv cov khoom siv silicon carbide (SiC), uas muaj qhov muaj peev xwm tiv taus qhov nqi ntawm 60kV thiab lub sijhawm rov qab rov qab luv luv rau 20ns, nrog kev txhim kho kev ua haujlwm ntawm 30% piv rau cov tsoos silicon diodes. Nws tuaj yeem txhawb X- cov tshuab hluav taws xob kom ua tiav millisecond qib kev tswj hwm thiab txo cov neeg mob hluav taws xob.

Hauv cov khoom siv kho mob portable, cov yam ntxwv siv hluav taws xob tsawg ntawm diodes tau dhau los ua qhov txiaj ntsig tseem ceeb. Piv txwv li, nyob rau hauv lub dynamic ntshav qabzib ntsuas (CGM), ultra-tsawg zog Schottky diodes yog siv nyob rau hauv lub hwj chim tswj Circuit Court, nrog rau pem hauv ntej voltage poob ntawm tsuas yog 0.2V, uas yog 50% qis dua li cov diodes. Qhov no tuaj yeem txuas lub cuab yeej lub roj teeb mus txog 14 hnub thiab ua tau raws li qhov xav tau kev saib xyuas tas li. Tsis tas li ntawd, nyob rau hauv cov khoom siv cog qoob loo xws li pacemakers, diodes raug tiv thaiv los ntawm ESD circuits los tiv thaiv electrostatic tawm los ntawm kev puas tsuaj rau cov khoom siv hluav taws xob, ua kom lub sijhawm ntev - lub sijhawm ua haujlwm ruaj khov ntawm cov cuab yeej hauv tib neeg lub cev.

4, Laser tswj: "lub teeb ci" rau kev kho mob
Hauv cov khoom siv kho mob laser, laser diodes (LDs) ua lub teeb ci tseem ceeb, tsim cov kab teeb ci sib txuas los ntawm electroluminescence kom ua tiav cov kev kho mob xws li txiav cov nqaij mos, coagulation, thiab vaporization. Piv txwv li, nyob rau hauv ophthalmic laser kho phais, femtosecond laser diodes emit pulsed lasers nrog ib tug wavelength ntawm 1053nm, uas precisely txiav lub corneal stroma los ntawm lub photoinduced rupture nyhuv. Cov mem tes dav mus txog qib femtosecond, thiab thaj chaw thermal raug mob tsawg dua 1 μ m, ua rau kev phais "dawb riam". Thaum lub sij hawm tus txheej txheem no, lub photodiode array saib xyuas lub zog laser thiab wavelength nyob rau hauv tiag- lub sij hawm, thiab xyuas kom meej cov zis tsis ruaj khov los ntawm kev tawm tswv yim tswj kom tsis txhob corneal puas los ntawm lub zog hloov.

Hauv kev kho photodynamic (PDT), lub laser diode emits lub teeb nruam ntawm ib lub wavelength tshwj xeeb (xws li 630nm), ua kom cov photosensitizer tsim cov pa oxygen thiab xaiv tua cov qog hlwb. Ib qho qauv ntawm PDT cov cuab yeej siv quantum zoo laser diodes, nrog cov zis hluav taws xob ruaj khov ntawm ± 0.5% thiab qhov tseeb wavelength ntawm ± 1nm, uas tuaj yeem tswj xyuas qhov ua kom zoo ntawm photosensitizers thiab txhim kho kev kho mob. Tsis tas li ntawd, hauv cov khoom siv kho mob infrared, lub teeb -emitting diodes (LEDs) emit 850nm ze-infrared lub teeb los txhawb kev kho cov ntaub so ntswg los ntawm cov teebmeem photobiological stimulation. Lawv cov zis hluav taws xob tau raug hloov kho los ntawm diodes nyob rau hauv qhov kev tsav tsheb tam sim no los xyuas kom meej qhov sib xws ntawm kev kho koob tshuaj.