一,WumnqwaziLen isetyenziswa kwiCCTVCiamera?
Iikhamera zeCCTV zinokusebenzisa iindidi ngeendidi zeelensi ngokuxhomekeke kusetyenziso olucetywayo kunye nendawo yokujonga efunekayo.Nazi ezinye iintlobo eziqhelekileyo zeelensi ezisetyenziswa kwiikhamera zeCCTV:
ILens eZinzisiweyo: Ezi lens zinobude obugxininisiweyo obusisigxina kwaye azikwazi ukulungiswa.Zisetyenziselwa izicelo apho umhlaba wokujonga awudingi kutshintshwa.
Ilensi yeVarifocal: Ezi lens zivumela umsebenzisi ukuba alungelelanise ubude bogxininiso kwaye ngenxa yoko indawo yokujonga.Ziluncedo xa ikhamera ifakwe kwindawo apho umgama phakathi kwekhamera kunye nesihloko unokwahluka.
Ilensi yokwandisa: Ezi lens zifana neelensi ze-varifocal kodwa zibonelela ngoluhlu olubanzi ngakumbi lohlengahlengiso lobude bengqwalasela.Bavumela umsebenzisi ukuba asondeze ngaphakathi okanye ngaphandle kumxholo ngaphandle kokuhambisa ikhamera.
I-Pinhole Lens: Ezi lens zinendawo encinci kakhulu, evumela ukuba ikhamera ifihliwe ngaphakathi kwento encinci okanye udonga.
Ukukhethwa kwelensi kuxhomekeke kwiimfuno ezithile zesicelo, ezifana nomgama kwisifundo, iimeko zokukhanyisa, kunye nentsimi efunwayo yokujonga.
二,WumnqwaziDoesCCTVCiameraLenDo?
Ilensi yenye yezona nxalenye zibalulekileyo zekhamera yeCCTV, njengoko inoxanduva lokuthatha kunye nokujolisa ukukhanya kwinzwa yomfanekiso wekhamera.I-lens inquma intsimi yokujonga kunye nobungakanani bokukhanya okungena kwikhamera, enokuthi ibe nempembelelo enkulu kumgangatho kunye nokucaca komfanekiso obangelwayo.
Ilensi isebenza ngokugoba imitha yokukhanya edlula kuyo, ukuze ihlangane kwindawo ekugxilwe kuyo kwinzwa yomfanekiso.Umgama ukusuka kwi-lens ukuya kwi-sensor yomfanekiso, kunye ne-curvature ye-lens, inquma ubude becala kunye ne-angle yokujonga ikhamera.
Ilensi yekhamera yeCCTV inokulungiswa okanye ihlengahlengiswe, ngokuxhomekeke kwiimfuno ezithile zesicelo.Iilensi ezilungisiweyo zineseti yobude obugxininisiweyo kunye nentsimi yokujonga, ngelixa iilensi ezihlengahlengiswayo, njenge-varifocal okanye i-zoom lens, zinokuhlengahlengiswa ukuze zitshintshe ubude bogxininiso kunye nendawo yokujonga.
Isishwankathelo, ilensi yekhamera yeCCTV idlala indima ebalulekileyo ekubambeni imifanekiso ekumgangatho ophezulu kunye nevidiyo.Ngokulawula ubungakanani bokukhanya okungena kwikhamera kunye ne-engile yokujonga, i-lens inceda ukuqinisekisa ukuba ikhamera ibamba umxholo ojoliswe kuyo kunye nenqanaba elifunekayo leenkcukacha kunye nokucaca.
三,Kwenziwa kanjaniChola iCCTVCiameraLen?
Ukukhetha i-lens yekhamera yeCCTV eyiyo kubalulekile ekufumaneni owona mfanekiso ubalaseleyo wenkqubo yakho yokhuseleko.Nazi ezinye izinto ekufuneka ziqwalaselwe xa ukhetha aIlensi yeCCTV:
Ubude bokuJonga: Ubude be-lens bumisela indawo yokujonga yekhamera, okanye ubungakanani bendawo enokuthi ithathwe yikhamera.Ukuba ufuna ukubeka iliso kwindawo enkulu, i-lens ene-angle ebanzi enobude obufutshane obugxininise iya kufuneka.Ukubeka iliso kwindawo ethile, i-lens ye-angle-angle encinci kunye nobude obude be-focal ifanelekile ngakumbi.Ungasebenzisa iikhaltyhuleyitha ze-intanethi ukumisela ubude obufanelekileyo bojoliso kwisicelo sakho ngokusekwe kumgama wesifundo kunye nendawo yokujonga oyifunayo.
Umngxuma wokuvula: I-aperture yisayizi yokuvula kwi-lens evumela ukukhanya ukungena kwikhamera.I-aperture enkulu (i-f-number ephantsi) iya kuvumela ukukhanya okungakumbi ukuba kungene kwikhamera, okukhokelela kwimifanekiso eqaqambileyo kwiimeko zokukhanya okuphantsi.Nangona kunjalo, isithuba esikhulu sinokubangela ubunzulu bomhlaba obungekho nzulu, obunokubangela ukuba izinto ezingaphambili okanye ezingasemva zibonakale ziluzizi.
Ukuhambelana: Qinisekisa ukuba ilensi iyahambelana nemodeli yakho yekhamera kunye nobungakanani boluvo.Iikhamera ezahlukeneyo zinokuba neentlobo ezahlukeneyo zokuxhoma, kwaye ayizizo zonke iilensi ezihambelanayo nazo zonke iimodeli zekhamera.
Umgangatho Womfanekiso: Khetha i-lens enomgangatho omhle womfanekiso, oya kuqinisekisa ukuba ikhamera ithatha imifanekiso ecacileyo, ecacileyo.
Uhlahlo lwabiwo-mali: Iindleko zeiilensi zekhamera yokhuselekoiyahluka ngokuxhomekeke kubude befocal, indawo yokuvula, kunye nomgangatho womfanekiso.Gqiba ibhajethi yakho kwaye ukhethe ilensi ehlangabezana neemfuno zakho kwaye iwela kuhlahlo lwabiwo-mali lwakho.
Ngamafutshane, xa ukhetha ilensi yekhamera yeCCTV, qwalasela ubude bojoliso, indawo yokuvula, ukuhambelana, umgangatho womfanekiso, kunye nohlahlo lwabiwo-mali ukuze uqinisekise ukuba ufumana owona mfanekiso usemgangathweni wenkqubo yakho yokhuseleko.
Ixesha lokuposa: May-05-2023
