Yuav txiav txim seb qhov zoo ntawm daim duab puas yoglub lens kho qhov muagzoo, qee cov qauv kev xeem yog qhov xav tau, xws li kev sim qhov ntev ntawm lub lens, thaj chaw pom, kev daws teeb meem, thiab lwm yam. Cov no yog cov cim qhia ib txwm muaj. Kuj tseem muaj qee cov cim qhia tseem ceeb, xws li MTF, kev cuam tshuam, thiab lwm yam.
1.MTF
MTF, lossis optical modulation transfer function, tuaj yeem ntsuas qhov ntau thiab tsawg ntawm ib daim duab, xws li cov ntsiab lus, qhov sib piv, thiab qhov meej. Nws yog ib qho ntawm cov cim qhia rau kev ntsuam xyuas qhov zoo ntawm lub lens.
Hauv MTF ob-seem kab sib koom ua ke, Y axis feem ntau yog tus nqi (0 ~ 1), thiab X axis yog qhov zaus ntawm qhov chaw (lp / mm), uas yog, tus lej ntawm "kab khub". Zaus qis yog siv los ntsuas qhov sib piv ntawm daim duab tom qab thaij duab, thiab zaus siab yog siv los tshuaj xyuas qhov meej thiab kev daws teeb meem ntawm lub lens, uas yog, lub peev xwm los paub qhov txawv ntawm cov ntsiab lus.
Piv txwv li, rau cov iav tsom iav duab, 10lp / hli feem ntau yog siv los tshuaj xyuas qhov sib piv ntawm cov nyhuv, thiab tus nqi MTF feem ntau siab dua 0.7 kom suav tias zoo; zaus siab tshuaj xyuas 30lp / hli, feem ntau ntau dua 0.5 hauv ib nrab ntawm qhov pom, thiab ntau dua 0.3 ntawm ntug ntawm qhov pom.
Kev kuaj MTF
Rau qee cov cuab yeej siv kho qhov muag lossiscov iav tsom iav lag luam, lawv muaj cov kev cai siab dua rau qhov zaus siab, yog li peb yuav xam qhov zaus siab uas peb xav tshuaj xyuas li cas? Qhov tseeb, nws yooj yim heev: zaus = 1000 / (2 × sensor pixel loj)
Yog tias qhov loj ntawm lub sensor pixel uas koj siv yog 5um, ces qhov zaus siab ntawm MTF yuav tsum tau kuaj xyuas ntawm 100lp / mm. Thaum tus nqi ntsuas ntawm MTF siab dua 0.3, nws yog lub lens zoo sib xws.
2.Kev cuam tshuam
MTF tsis tuaj yeem qhia txog qhov aberration ntawm distortion, yog li distortion raug teev tseg cais. Distortion, lossis deformation, tuaj yeem muab faib ua pincushion distortion thiab barrel distortion.
Kev cuam tshuam yog cuam tshuam nrog thaj chaw pom. Qhov loj dua ntawm thaj chaw pom, qhov kev cuam tshuam loj dua. Rau cov iav koob yees duab ib txwm muaj thiab cov iav saib xyuas, kev cuam tshuam hauv 3% yog qhov txais tau; rau cov iav dav dav, kev cuam tshuam tuaj yeem nyob nruab nrab ntawm 10% thiab 20%; rau cov iav fisheye, kev cuam tshuam tuaj yeem yog 50% txog 100%.
Cov nyhuv ntawm kev cuam tshuam ntawm lub lens fisheye
Yog li, koj yuav txiav txim siab li cas tias koj xav tswj qhov kev cuam tshuam ntawm lub lens ntau npaum li cas?
Ua ntej, koj yuav tsum txiav txim siab seb kojlub lenssiv rau. Piv txwv li, yog tias nws siv rau hauv kev thaij duab lossis kev saib xyuas, ces qhov kev cuam tshuam ntawm lub lens hauv 3% raug tso cai. Tab sis yog tias koj lub lens siv rau kev ntsuas, ces qhov kev cuam tshuam yuav tsum tsawg dua 1% lossis qis dua. Tau kawg, qhov no kuj nyob ntawm qhov yuam kev ntawm lub kaw lus uas koj lub kaw lus ntsuas tso cai.
Cov Lus Xaus:
Los ntawm kev ua haujlwm nrog cov kws tshaj lij ntawm ChuangAn, ob qho tib si tsim thiab tsim khoom yog ua los ntawm cov kws ua haujlwm txawj ntse. Raws li ib feem ntawm cov txheej txheem yuav khoom, tus neeg sawv cev ntawm lub tuam txhab tuaj yeem piav qhia ntxiv txog cov ntaub ntawv tshwj xeeb txog hom lens uas koj xav yuav. ChuangAn cov khoom siv lens siv rau ntau yam kev siv, los ntawm kev saib xyuas, kev luam theej duab, drones, tsheb mus rau cov tsev ntse, thiab lwm yam. ChuangAn muaj ntau hom lens tiav lawm, uas kuj tuaj yeem hloov kho lossis kho raws li koj xav tau. Tiv tauj peb sai li sai tau.
Lub sijhawm tshaj tawm: Plaub Hlis-08-2025
