Ubuchwepheshe bokuthola inkulumo ekude nge-laser

Ubuchwepheshe bokuthola inkulumo ekude nge-laser
I-Laserukutholwa kwenkulumo okude: Ukwembula isakhiwo sesistimu yokuthola

Umsebe omncane we-laser udansa kahle emoyeni, uthulisa imisindo ekude, isimiso esingemuva kwalesi "simangaliso" sobuchwepheshe besikhathi esizayo siyinto engavamile futhi sigcwele ubuhle. Namuhla, ake siphakamise iveli kulobu buchwepheshe obumangalisayo futhi sihlole isakhiwo nezimiso zalo ezinhle. Isimiso sokutholwa kwezwi elikude nge-laser siboniswe kuMfanekiso 1(a). Uhlelo lokutholwa kwezwi elikude nge-laser lwakhiwe uhlelo lokulinganisa ukudlidliza nge-laser kanye nenhloso yokulinganisa ukudlidliza engasebenzisani. Ngokwendlela yokuthola ukubuya kokukhanya, uhlelo lokuthola lungahlukaniswa ngohlobo olungaphazamisi kanye nohlobo lokuphazamiseka, kanti umdwebo weskimu uboniswe ngokulandelana kuMfanekiso 1(b) kanye no-(c).

UMFANELO 1 (a) Umdwebo webhulokhi wokutholwa kwezwi elikude nge-laser; (b) Umdwebo weskimu wohlelo lokulinganisa ukudlidliza okukude nge-laser okungeyona i-interferometric; (c) Umdwebo oyinhloko wohlelo lokulinganisa ukudlidliza okukude nge-laser okungeyona i-interferometric

一. Uhlelo lokuthola okungaphazamisi Ukutholwa okungaphazamisi kuyisici esilula kakhulu sabangane, ngokusebenzisa imisebe ye-laser ebusweni obuqondiwe, kanye nokunyakaza okuqondile kokuguquguquka kwe-azimuth yokukhanya okubonakalayo okuholela ekushintsheni ekugcineni kokwamukela kobukhulu bokukhanya noma isithombe samachashazi ukuze kulinganiswe ngqo ukudlidliza okuncane kobuso obuqondiwe, bese "kuqondile kuya kuqondile" ukuze kufezwe ukutholwa kwesignali ye-acoustic ekude. Ngokusho kwesakhiwo sokwamukela.umshini wokuthola izithombe, uhlelo lokungaphazamisi lungahlukaniswa ngohlobo lwephuzu elilodwa kanye nohlobo lwe-array. Ingqikithi yesakhiwo sephuzu elilodwa "ukwakhiwa kabusha kwesignali ye-acoustic", okungukuthi, ukudlidliza kobuso bento kulinganiswa ngokulinganisa ushintsho lokukhanya kokutholwa komtshina okubangelwa ushintsho lokuqondisa kokukhanya okubuyayo. Isakhiwo sephuzu elilodwa sinezinzuzo zezindleko eziphansi, isakhiwo esilula, izinga eliphezulu lokuhlola kanye nokwakhiwa kabusha kwesignali ye-acoustic ngesikhathi sangempela ngokwempendulo ye-detector photocurrent, kodwa umphumela we-laser speckle uzobhubhisa ubudlelwano obuqondile phakathi kokudlidliza kanye nokukhanya komshini wokuhlola, ngakho-ke kuvimbela ukusetshenziswa kwesistimu yokuthola ukungaphazamisi kwephuzu elilodwa. Isakhiwo se-array sakha kabusha ukudlidliza kobuso bethagethi nge-algorithm yokucubungula isithombe se-speckle, ukuze uhlelo lokulinganisa ukudlidliza lube nokuzivumelanisa okunamandla nobuso obumaphakathi, futhi lube nokunemba okuphezulu kanye nokuzwela.

Futhi. Uhlelo lokuthola ukuphazamiseka luhlukile ekungaphazamiseki kokubona, ukutholwa kokuphazamiseka kunobuhle obungaqondile, isimiso siwukukhanya nge-laser ebusweni be-target, ubuso obuqondiwe eceleni kwe-optical axis yokufuduka kuya ekukhanyeni kwangemuva kwethula ushintsho lwesigaba/imvamisa, ukusetshenziswa kobuchwepheshe bokuphazamiseka ukukala ukushintsha kwemvamisa/isigaba ukuze kufezwe ukulinganiswa kokudlidliza okukude. Njengamanje, ubuchwepheshe bokuthola i-interferometric obuthuthukisiwe bungahlukaniswa ngezinhlobo ezimbili ngokuya ngesimiso sobuchwepheshe bokulinganisa ukudlidliza kwe-laser Doppler kanye nendlela yokuphazamiseka kokuzixuba nge-laser ngokusekelwe ekutholakaleni kwesignali ye-acoustic ekude. Indlela yokulinganisa ukudlidliza kwe-Laser Doppler isekelwe kumphumela we-Doppler we-laser ukuthola isignali yomsindo ngokulinganisa ukushintsha kwemvamisa ye-Doppler okubangelwa ukudlidliza kobuso bento eqondiwe. Ubuchwepheshe be-interferometry yokuzixuba nge-laser bulinganisa ukufuduka, isivinini, ukudlidliza kanye nebanga le-target ngokuvumela ingxenye yokukhanya okubonakalayo kwe-target ekude ukuthi iphinde ingene ku-resonator ye-laser futhi ibangele ukuguqulwa kwe-amplitude kanye nemvamisa yensimu ye-laser. Izinzuzo zayo zisesayizi encane kanye nokuzwela okuphezulu kohlelo lokulinganisa ukudlidliza, kanyei-laser enamandla aphansiingasetshenziswa ukuthola isignali yomsindo ekude. Uhlelo lokulinganisa oluzixubayo lwe-laser olushintsha imvamisa ukuthola isignali yenkulumo ekude luboniswe kuMfanekiso 2.

UMFANELO 2 Umdwebo wesimiso wohlelo lokulinganisa i-frequency-shift laser oluzixubayo

Njengendlela yobuchwepheshe ewusizo nephumelelayo, "umlingo" we-laser udlala inkulumo ekude hhayi nje kuphela emkhakheni wokuthola, emkhakheni wokuthola okuphikisayo futhi unokusebenza okuhle kakhulu kanye nokusetshenziswa okubanzi - ubuchwepheshe bokulinganisa ukuvalelwa kwe-laser. Lobu buchwepheshe bungafinyelela izindlela zokuvalelwa kwezinga lamamitha ayi-100 ezindlini zangaphakathi, ezakhiweni zamahhovisi nakwezinye izindawo zodonga lwekhethini lengilazi, futhi idivayisi eyodwa ingavikela ngempumelelo igumbi lenkomfa elinendawo yefasitela engamamitha-skwele ayi-15, ngaphezu kwesivinini sokuphendula okusheshayo sokuskena nokubeka ngaphakathi kwemizuzwana eyi-10, ukunemba okuphezulu kokubeka izinga lokuqashelwa okungaphezu kuka-90%, kanye nokuthembeka okuphezulu komsebenzi ozinzile wesikhathi eside. Ubuchwepheshe bokulinganisa ukuvalelwa kwe-laser bunganikeza isiqinisekiso esinamandla sokuphepha kolwazi lwe-acoustic lwabasebenzisi emahhovisi abalulekile embonini nakwezinye izimo.