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1、ThetechnicalcharacteristicandapplicationofopticalcouplerTheopticalcoupler(OC)alsocallsthephotoelectricitydisconnectororthephotoelectricitycoupler..Ittransmitstheelectricalsignalcomponenttakingthelightasthemedium.usuallytheilluminator(infraredlightemitt
2、erdiodeLED)andopticalreceiver(photosensitivetransistor)aresealedintheidenticalshell.Whentheimportationaddedtheelectricalsignal,theilluminatorsendsoutthelight,afteracceptedthelight,thelightrcceiverproducingthephotoelectriccurrent,flowingoutfromtheexport
3、ation,thusrealizedthe“electricity-light-electricity”transformation.Theopticalcoupler，takingthelightasmediumandcouplingimportationsignaltoexportation,becauseoftheslightlyvolume,thelonglife,thenon-contact,theantijammingability,betweentheexportationandthe
4、importationinsulating,unidirectionaltransmissionsignalandsoon,obtainsthewidespreadapplicationonthedigitalcircuit.Forseveralyears,thenewtypeopticalcoupleremergedunceasingly,havesatisfiedeachkindoflightcontrolingt.Itsapplicationscopeexpandedthemeasuringi
5、nstruments,precisioninstrument,industrialusedelectronicinstrumentation,computerandexternalinstrumentation,telegraph,semaphoreandpathintelligencesystem,electricalpowerequipmentandsoon.Theopticalcouplerhasusedinthesystemofelectricalisolation,likecomputer
6、,powersourcesupply,communicationandcontroller.Theexample,theopticalcouplerisusinginthetelecommunicationequipment,theprogrammablecontroller,thecocurrent--Direct-currentswitch,exchange---Direct-currentswitchandbatterychargerandsoon.Theopticalcoupleristhe
7、heartofanopticalcommunicationnetworkcore，Usingintheelectricalisolationofinputsignalandthecorrespondingoutputsignal.Playingtherolesinthedifferentisolationelectriccircuits,theneedingvoltagesareverygreatdifferent.Theopticalcouplerhasprovidedasuperiority,t
8、hatistheelectricityisolatesbetweentwoelectriccircuits,thusreducedtheconnectionquestions.TheelectricalisolationoccurrenceisbecauseofthesignaltransmissionthroughtheLEDillumination,andbythelightrespondedthetransistorreceives.Whenchangethes
