Sebopeho saSesebelisoa sa ho lemoha foto sa PIN
Sesebelisoa sa ho lemoha foto, sesebediswa se fetolang matshwao a lesedi hore e be matshwao a motlakase se sebedisa phello ya photoelectric, se tshwana le leihlo la motho mme se ka hapa matshwao a fokolang a bonahalang le a sa bonahaleng. Ka lebaka la molao-motheo wa sona wa ho sebetsa ha mahlasedi a lesedi a bakang diphetoho thepeng ya mmele ya dintho, di-photodetector di na le mefuta e mengata ya dikgetho tsa thepa le mefuta e mengata e fapaneng, e nngwe le e nngwe e na le maemo a yona a ikgethang a tshebediso.
Mefuta ea li-photodetector e arotsoe ho latela litšobotsi tsa eona tsa sebopeho, ho kenyeletsoa lisebelisoa tsa vacuum optoelectronic, li-photoconductive detector,Li-photodiode tsa PIN, li-phototransistors, le li-avalanche diode detectors (Sesebelisoa sa ho lemoha foto sa APD). Ntho e hlokomelehang haholo ke PIN photodetector, e eketsang bophara ba sebaka sa ho fokotseha ka ho kenya lera la semiconductor la mofuta oa I la mahloriso a tlase kopanong ea PN, ka hona e fokotsa tšusumetso ea motsamao oa ho hasana le ho ntlafatsa lebelo la karabelo.
Li-photodiode tsa PIN li sebelisitsoe haholo mafapheng a fapaneng a kang puisano ea mahlo, tekanyo ea mahlo, litšoantšo tsa bongaka, le laser ka lebaka la bokhoni ba tsona bo phahameng ba quantum, lerata le tlaase, karabelo e pharaletseng ea spectral, le karabelo e potlakileng. Mohlala, li-detector tsa amplification tse thehiloeng ho silicon tsa LBTEK le li-photodetector tse leka-lekaneng ke tsa sehlopha sena. Leha ho le joalo, hoa bohlokoa ho hlokomela hore li-photodetector tsa PIN li lekanyelitsoe bokhoning ba tsona ba ho lemoha matšoao a fokolang a leseli ka lebaka la ho hloka keketseho e eketsehileng. Photodiode ea avalanche (APD photodetector) e eketsa photocurrent ka ho hlahisa sebaka sa gain ea hona joale ka har'a PIN photodiode le ho sebelisa phello ea eona ea katoloso ea avalanche ea kahare. Sena se fa li-photodetector tsa APD monyetla ho feta li-photodetector tsa PIN ho lemoha matšoao a fokolang, ka phaello ea kahare ea makhetlo a fihlang ho a 10 ho isa ho a 100. Molao-motheo o sebetsang oa photodetector oa fapana ho latela mofuta oa oona o itseng, empa molao-motheo oa eona oa phello ea photoelectric o sebetsa ho mefuta e fapaneng ea li-photodetector.
Jwalo ka karolo ya mantlha ya ditsamaiso tsa sejwalejwale tsa optoelectronic, tshebetso ya di-photodetector e etsa qeto ka ho toba ho nepahala, ho tshepahala le botsitso ba sistimi yohle. E sebediswa haholo mafapheng a kang puisano ya fiber optic, tlhokomelo ya tikoloho, ditshwantsho tsa bongaka, tlhahlobo ya sesole, othomathike ya diindasteri le dipatlisiso tsa mahlale, tse ikarabellang bakeng sa ho fetola matshwao a optical hore e be matshwao a motlakase a ka lekanngwang. Ka hona, ho lemoha ka botlalo le ka nepo ha di-photodetector ho bohlokwa.
Nako ea poso: Mmesa-20-2026