一,WumnqwaziLi-ens isetyenziswa kwi-CCTVCamera?
Iikhamera zeCCTV zingasebenzisa iintlobo ezahlukeneyo zeelensi kuxhomekeke kwindlela ezisetyenziselwa ngayo kunye nombono ofunwayo. Nazi ezinye zeentlobo eziqhelekileyo zeelensi ezisetyenziswa kwiikhamera zeCCTV:
Ilensi eQinisekileyo: Ezi lensi zinobude obungaguqukiyo befocal kwaye azinakulungiswa. Zisetyenziselwa usetyenziso apho intsimi yokujonga ingadingi kutshintshwa.
Ilensi yeVarifocal: Ezi lensi zivumela umsebenzisi ukuba alungise ubude befocal kunye nentsimi yokujonga. Ziluncedo xa ikhamera ifakiwe kwindawo apho umgama phakathi kwekhamera nomntu ochaphazelekayo unokwahluka khona.
Ilensi yokusondeza: Ezi lensi zifana neelensi ze-varifocal kodwa zibonelela ngoluhlu olubanzi lokulungiswa kobude be-focal. Zivumela umsebenzisi ukuba asondeze okanye akhuphe umfanekiso ngaphandle kokuhambisa ikhamera.
Ilensi yePinhole: Ezi lensi zinomngxuma omncinci kakhulu, ovumela ikhamera ukuba ifihlwe ngaphakathi kwento encinci okanye udonga.
Ukukhethwa kwelensi kuxhomekeke kwiimfuno ezithile zokusetyenziswa, ezifana nomgama oya kumntu oza kujonga, iimeko zokukhanya, kunye nombono ofunekayo.
二,WumnqwaziDii-oesI-CCTVCi-ameraLii-ensDo?
Ilensi yenye yezona zinto zibalulekileyo kwikhamera yeCCTV, njengoko inoxanduva lokuthatha nokugxila ukukhanya kwisenzi somfanekiso sekhamera. Ilensi imisela indawo yokujonga kunye nobungakanani bokukhanya okungena kwikhamera, nto leyo enokuba nefuthe elikhulu kumgangatho kunye nokucaca komfanekiso ophumayo.
Ilensi isebenza ngokugoba imisebe yokukhanya edlula kuyo, ukuze ihlangane kwindawo egxile kwisenzi yomfanekiso. Umgama ukusuka kwilensi ukuya kwisenzi yomfanekiso, kunye nokugoba kwelensi, kumisela ubude be-focal kunye ne-engile yokujonga kwekhamera.
Ilensi yekhamera yeCCTV inokulungiswa okanye ilungiswe, kuxhomekeke kwiimfuno ezithile zesicelo. Iilensi ezizinzileyo zinobude obumiselweyo befocal kunye nebala lokujonga, ngelixa iilensi ezihlengahlengiswayo, ezifana neelensi ze-varifocal okanye ze-zoom, zinokulungiswa ukuze kutshintshwe ubude befocal kunye nebala lokujonga.
Ngamafutshane, ilensi yekhamera yeCCTV idlala indima ebalulekileyo ekuthatheni imifanekiso esemgangathweni ophezulu kunye nevidiyo. Ngokulawula ubungakanani bokukhanya okungena kwikhamera kunye ne-engile yokujonga, ilensi inceda ukuqinisekisa ukuba ikhamera ithatha umxholo ocetywayo ngenqanaba elifunekayo leenkcukacha kunye nokucaca.
三,Kwenziwa kanjaniCvula i-CCTVCi-ameraLii-ens?
Ukukhetha ilensi yekhamera yeCCTV efanelekileyo kubalulekile ukuze ufumane umfanekiso osemgangathweni ophezulu kwinkqubo yakho yokhuseleko. Nazi ezinye izinto ekufuneka uziqwalasele xa ukhethaIlensi yeCCTV:
Ubude beFocal: Ubude be-focal lens bumisela indawo yokujonga ikhamera, okanye ukuba ikhamera ingayithatha indawo engakanani na. Ukuba ufuna ukujonga indawo enkulu, kuya kufuneka ilensi ebanzi enobude obufutshane be-focal. Ukujonga indawo ethile, ilensi e-engile emxinwa enobude obude be-focal ifanelekile ngakumbi. Ungasebenzisa ii-calculator ezikwi-intanethi ukumisela ubude be-focal obufanelekileyo kwisicelo sakho ngokusekelwe kumgama oya kwisihloko kunye nendawo yokujonga oyifunayo.
Imbobo: Imbobo bukhulu bomngxuma okwilensi ovumela ukukhanya ukuba kungene kwikhamera. Imbobo enkulu (inombolo esezantsi ye-f) iya kuvumela ukukhanya okungakumbi ukuba kungene kwikhamera, nto leyo ekhokelela kwimifanekiso ekhanyayo kwiimeko zokukhanya okuphantsi. Nangona kunjalo, imbobo enkulu inokubangela ubunzulu obungaphantsi kwentsimi, nto leyo enokubangela ukuba izinto ezingaphambili okanye ezingasemva zibonakale zingacacanga.
Ukuhambelana: Qinisekisa ukuba ilensi iyahambelana nemodeli yekhamera yakho kunye nobukhulu besenzisi. Iikhamera ezahlukeneyo zinokuba neentlobo ezahlukeneyo zokuxhoma, kwaye ayizizo zonke iilensi ezihambelana nazo zonke iimodeli zekhamera.
Umgangatho woMfanekiso: Khetha ilensi enomfanekiso osemgangathweni olungileyo, eya kuqinisekisa ukuba ikhamera ithatha imifanekiso ecacileyo neneenkcukacha.
Uhlahlo lwabiwo-maliIxabiso leiilensi zekhamera yokhuselekoiyahluka ngokuxhomekeke kubude befocal, i-aperture, kunye nomgangatho womfanekiso. Misela uhlahlo lwabiwo-mali lwakho kwaye ukhethe ilensi ehlangabezana neemfuno zakho kwaye ewela kuhlahlo lwabiwo-mali lwakho.
Ngamafutshane, xa ukhetha ilensi yekhamera yeCCTV, cinga ngobude befocal, i-aperture, ukuhambelana, umgangatho womfanekiso, kunye nohlahlo-lwabiwo mali ukuqinisekisa ukuba ufumana umgangatho womfanekiso ongcono kakhulu kwinkqubo yakho yokhuseleko.
Ixesha lokuthumela: Meyi-05-2023
