Iilensi zokuskena umgcayinxalenye ebalulekileyo yeenkqubo zokubona koomatshini. Ukukhethwa kwabo ngumsebenzi onamaqondo amaninzi, ocwangcisiweyo—kwaye eneneni linqanaba elibalulekileyo—elifuna uvavanyo olupheleleyo lokuhambelana kwezinto ezahlukeneyo, kuquka yonke inkqubo yokujonga imifanekiso ye-line scan, imeko ethile yesicelo, kunye neemeko zokusingqongileyo.
Ngokubanzi, nantsi into ebalulekileyo ekufuneka uyiqwalasele xa ukhetha ilensi yokuskena umgca:
1.Iiparamitha ze-core optical
(1)Isisombululo: Isisombululo selensi sibhekisa kubuchule belensi bokusombulula iinkcukacha ezincinci; kufuneka ihambelane nobukhulu bepikseli yekhamera kwaye ngokubanzi kufuneka idlule uxinano lwepikseli yekhamera ukuqinisekisa ukuba ubungakanani obuncinci bokubonwa buyabonakala. Ukuze kufezekiswe umgangatho ophezulu womfanekiso, kudla ngokufuneka ukhethe ilensi enesisombululo esiphezulu; ukuba kukhethwe ilensi enesisombululo esiphantsi, iingenelo ezinikezelwa yinani eliphezulu lepikseli yekhamera azinakufunyanwa ngokupheleleyo.
(2)Ubude beFocal: Ubude befocal yelensi busebenza njengekhonkco elidibanisa umgama wokusebenza, intsimi yombono, kunye nobukhulu benzwa; yeyona nto iphambili emisela ukwandiswa kwemifanekiso kwaye inefuthe kuyilo lwendawo kunye nobude bendlela ye-optical yenkqubo. Ubude befocal obude bubangela ukwandiswa okuphezulu kunye nentsimi encinci yombono, okwenza ukuba ifaneleke ukuhlola izinto ezincinci okanye kwizicelo ezifuna ukwandiswa okuphezulu; ngokuchaseneyo, ubude befocal obufutshane buvelisa ukwandiswa okuphantsi kunye nentsimi enkulu yombono, okwenza ukuba ifaneleke ukuhlola izinto ezinefomathi ebanzi.
(3)Ukuvula kunyedi-ephth yefintsimi: Ubungakanani bembobo buchaphazela ubungakanani bokukhanya okungena kumfanekiso kunye nobunzulu bentsimi. Imbobo ebanzi ifanelekile kwiindawo ezinokukhanya okuphantsi, nangona isenokuza ngexabiso lobunzulu bentsimi; ngokuchaseneyo, imbobo emxinwa yonyusa ubunzulu bentsimi kodwa ifuna ukukhanya okuqinileyo. Ngokubanzi, izinto ezinemiphezulu engalinganiyo zifuna ubunzulu obukhulu bentsimi, nto leyo edinga ulungelelwaniso olucokisekileyo phakathi kobukhulu bembobo kunye nexesha lokuvezwa; nangona kunjalo, xa ufota izinto ezihamba ngesantya esiphezulu okanye kwizicelo ezifuna amaxesha amafutshane okuvezwa, kufuneka kukhethwe ilensi yembobo ebanzi yokuphucula ukukhanya komfanekiso.
I-Aperture yiparameter ebalulekileyo yeelensi zokuskena umgca
(4)Indawo yokujonga kunye nomgama wokusebenza: Ummandla wombono umiselwa bubude be-focal yeilensikunye nobude be-sensor yekhamera. Indawo efanelekileyo yokujonga kufuneka imiselwe ngokobukhulu boluhlu lokudubula. Umzekelo, xa udubula izinto ezinkulu, ilensi enommandla omkhulu wokujonga kufuneka ikhethwe. Umgama wokusebenza umiselwa luyilo lwesakhiwo soomatshini; kubalulekile ukuchaza uluhlu olufunekayo lomgama wokusebenza, kwaye emva koko, ukhethe ilensi ewela ngaphakathi kolu luhlu oluthile ngokusekelwe kumgama wokwenyani phakathi kwelensi nento ekusetyenzisweni kwayo.
2.Izinto zoomatshini kunye nokufakelwa
Okokuqala nokubalulekileyo, ilensi yokuskena umgca ekhethiweyo kufuneka ihambelane nobukhulu besenzi sekhamera; oku kuqinisekisa ukuba ilensi ingayisebenzisa ngokupheleleyo indawo yokufota yesenzi kwaye ithintela imiba efana nokugqwetheka komfanekiso emaphethelweni. Ukongeza, kubalulekile ukuqinisekisa ukuba ilensi yokuskena umgca ekhethiweyo ihambelana nohlobo lojongano lwekhamera okanye inkqubo yokuhlola.
Iintlobo eziqhelekileyo zokuxhoma ziquka u-C, u-CS, u-F, kunye no-M42; ukungafani kojongano kuya kwenza ukuba ukuhlanganiswa okanye ukugxila kungenzeki. Ngaphezu koko, kwiindawo zokufakela ezinesithuba esincinci, umntu kufuneka aqwalasele impembelelo yobukhulu bomzimba kunye nobunzima belensi kwinkqubo yokufakela.
3.Izalathi zokusebenza
(1)Ukusebenza kwe-MTF: I-MTF (umsebenzi wokudlulisa i-modulation) ilinganisa amandla elensi okusombulula kwiifrikhwensi ezahlukeneyo zendawo, kuquka ulwazi oluninzi olufana nomahluko, isisombululo, i-spatial frequency, kunye ne-chromatic aberration. Esi salathisi sibaluleke kakhulu kuvavanyo lwemizi-mveliso apho kufuneka khona ukulinganisa okuchanekileyo. I-MTF ephezulu iqinisekisa ukuthembeka kweenkcukacha ngexesha lokuskena umgca; ngenxa yoko, ukukhetha ilensi enomsebenzi ophezulu we-MTF kuvelisa iziphumo zomfanekiso eziphuculweyo.
Umzekelo weziphumo zovavanyo lweLens MTF
(2)Ukuphambuka kunye nokuphazamiseka kwe-chromatic: Ukuphambuka kunye nokuphazamiseka kwe-chromatic ziingxaki eziqhelekileyo kwiinkqubo ze-optical. Xa ukhetha i-ilensi, kufuneka uqaphele inqanaba lolawulo lokuphazamiseka kunye nokuphazamiseka kwe-chromatic. Iinkqubo zokuskena umgca zinobuthathaka kakhulu ekuphazamisekeni kwejometri, okunokukhokelela kwiimpazamo zokulinganisa, kwaye ukuphazamiseka kwe-chromatic kunokuchaphazela ukuhambelana komfanekiso kwiiwavelength ezahlukeneyo. Ingakumbi kwiimeko zokuhlola ezifuna ukuchaneka okuphezulu kakhulu, kubalulekile ukukhetha iilensi eziphawulwa kukuphazamiseka okuphantsi kunye nokulungiswa okusebenzayo kokuphazamiseka kwe-chromatic; iilensi zokuskena umgca eziphezulu zihlala zigcina izinga lokuphazamiseka elingaphantsi kwe-0.05%.
(3) Ukufana kwentsimi yomfanekiso: Iilensi zokuskena umgca ziyafuneka ukuze kugcinwe isisombululo esizinzileyo kuyo yonke intsimi yomfanekiso, ukuqinisekisa ubukhali obuhambelanayo kwiindawo ezahlukeneyo zomfanekiso, kunye nobukhali obungaguqukiyo obungaphezulu kwe-98% phakathi kombindi kunye nemiphetho.
4.Umgangatho womfanekiso kunye neemfuno ezikhethekileyo
(1)Ukuhambelana kweSpectral: Xa indawo yokufumanisa ibonakala ngokukhanya, i-infrared okanye i-ultraviolet, kufuneka kukhethwe ilensi enoluhlu lwe-spectral oluhambelanayo ukuze kuthintelwe ukuphazamiseka kwe-spectral kunye nokuncitshiswa komfanekiso. Umzekelo, ukuba usebenzisa ikhamera ye-UV okanye ye-IR, kufuneka kukhethwe ilensi ye-UV okanye ye-IR eyenzelwe ngokukodwa ukulungisa ukuguquguquka kwe-chromatic kuloo band.
(2)Ireyithi yomgca: Isantya somgca simiselwa yisantya somgca wemveliso, ububanzi bombono, kunye nobukhulu bepikseli. Ilensi kufuneka igcine ukusebenza okwaneleyo kwe-optical (MTF, ukukhanya kwe-flux) kwisantya somgca esifunekayo.
Umgangatho womfanekiso kunye neemfuno ezikhethekileyo zeelensi zokuskena umgca
5.Indawo yokusetyenziswa kunye neemfuno zesicelo
Xa ukhetha ilensi, kubalulekile nokukhetha ilensi yokuskena umgca enika ukuqina okuphezulu kunye nokuguquguquka okunamandla—ngokusekwe kwimeko ethile yokusetyenziswa kunye neemfuno zesicelo—ukuqinisekisa ukusebenza okuthembekileyo kunye nokufezekiswa kweziphumo ezinqwenelekayo kwiindawo ezahlukeneyo. Umzekelo, kwiindawo zoshishino ezinzima (ukungcangcazela, umahluko omkhulu kubushushu), iilensi zodidi lweshishini ezinezindlu zesinyithi eziqinileyo kunye noyilo olumelana nothuli kunye nokutshiza kufuneka ziqwalaselwe.
Ngamafutshane, ukukhethwa kweilensi yokuskena umgcaibandakanya inkqubo equka ukuqinisekiswa kweemfuno zokuhlolwa, ukubalwa kweeparameter ze-optical, ukufanisa ii-interfaces kunye neendlela zokufakela, kunye novavanyo lokuzivumelanisa nokusingqongileyo. Le nkqubo ibandakanya ngokuyintloko ukuqwalaselwa ngokubanzi kwezinto eziphambili ezikhankanyiweyo ngaphambili ukuqinisekisa ukukhethwa kwelensi efanelekileyo, ngaloo ndlela kufezekiswa iziphumo zomfanekiso ezisemgangathweni ophezulu kunye nokuhlangabezana neemfuno ezithile zesicelo sokwenyani.
Iingcinga Zokugqibela:
Ukuba unomdla wokuthenga iintlobo ngeentlobo zeelensi zokujonga, ukuskena, iidrone, ikhaya elikrelekrele, okanye naluphi na olunye uhlobo lokusetyenziswa, sinazo izinto ozifunayo. Nxibelelana nathi namhlanje ukuze ufunde okungakumbi ngeelensi zethu kunye nezinye izixhobo.
Ixesha leposi: Epreli-21-2026
