Dab tsi yog lub teeb qis in kev yees duab,and dab tsi ua 0.0001Luxqisillumination txhais tau tias?

Txhais

Illuminance yog qhov ci ci, thiab qhov illuminance tsawg txhais tau tias tsis muaj qhov ci, xws li chav tsaus nti, lossis teeb pom kev zoo uas tsis muaj qhov ci..

Ambient illuminance (brightness) feem ntau yog ntsuas hauv lux, thiab qhov me dua tus nqi, qhov tsaus ntuj. Lub illuminance Performance index ntawm lub koob yees duab kuj ntsuas nyob rau hauv lux. Qhov tsawg dua tus nqi, qhov siab dua thiab qhov pom tseeb dua cov khoom hauv qhov tsaus ntuj tuaj yeem pom. Yog li ntawd, theem ntawm illumination dhau los ua qhov tseem ceeb rau tib neeg xaiv lub koob yees duab.

 

Yam tsawg kawg illumination yog dab tsi? Sensitivity yog dab tsi? Dab tsi yog 0.0001 lux sawv rau?

Illuminance yog qhov ci ci ntawm 1 square meter, chav tsev: Lux, yav tas los sau ua Lux. Qhov tsawg kawg nkaus illuminance yog hais txog qhov illuminance thaum tib neeg lub qhov muag tuaj yeem hnov ​​​​twilight rau hauv av. Sensitivity yog hais txog "teb rau lub teeb". Muaj ntau yam rhiab heev, tib neeg qhov muag rhiab heev, tsis zoo zaj duab xis rhiab heev, thiab photosensitive raj rhiab heev. Lub teeb pom kev hauv tsev, feem ntau 200Lx, 0.0001Lx txhais tau tias heev, tsaus heev, tib neeg lub qhov muag tsis tuaj yeem hnov ​​lub teeb.

Yam tsawg kawg illumination yog ib txoj hauv kev los ntsuas qhov rhiab heev ntawm lub koob yees duab. Nws yog siv los txiav txim seb qhov illumination tsawg npaum li cas thiab tseem tsim tau cov duab siv tau. Tus nqi no tau raug txhais tsis raug thiab tsis lees paub vim tias tsis muaj kev lag luam tus qauv piav qhia txog tus nqi lux. Txhua lub tuam txhab loj CCD muaj lawv tus kheej txoj hauv kev los ntsuas qhov rhiab heev ntawm lawv lub koob yees duab CCD.

Txoj kev ua tau zoo tshaj plaws thiab raug los ntsuas qhov ntsuas qhov pom tsawg kawg yog hu ua lub hom phiaj illumination. Lub hom phiaj illumination qhia peb ntau npaum li cas lub teeb tau txais los ntawm lub dav hlau duab ntawm lub koob yees duab qhov twg CCD nto nyob.

Los ntawmhom ntawv, kev txiav txim siab lub teeb pom kev zoo muaj feem xyuam rau yam tsawg kawg yog ob yam, F tus nqi ntawm lub lens thiab tus nqi IRE:

F tus nqi

Nws yog ib txoj hauv kev los ntsuas lub peev xwm ntawm lub lens kom khaws lub teeb. Lub lens zoo tuaj yeem khaws ntau lub teeb thiab xa mus rau CCD sensor. Lub lens F1.4 tuaj yeem khaws 2 npaug ntawm lub teeb dua li lub lens F2.0. Hauv lwm lo lus, F1.0 lo ntsiab muag tuaj yeem khaws 100 npaug ntau dua lub teeb dua li F10 lens, yog li nws tseem ceeb heev uas yuav tsum tau kos tus nqi F hauv kev ntsuas, txwv tsis pub cov txiaj ntsig yuav tsis muaj nuj nqis.

 

IRE tus nqi

Qhov siab tshaj plaws ntawm qhov tso zis video ntawm lub koob yees duab feem ntau yog teeb tsa ntawm 100IRE lossis 700mV. 100IRE video txhais tau hais tias nws tuaj yeem tsav lub monitor nrog qhov ci zoo tshaj plaws thiab qhov sib txawv. Ib daim vis dis aus nrog tsuas yog 50IRE txhais tau tias tsuas yog ib nrab ntawm qhov sib piv, 30IRE lossis 210mV Volts txhais tau tias tsuas yog 30% ntawm qhov qub amplitude, feem ntau 30IRE yog tus nqi qis tshaj plaws los nthuav qhia cov duab muaj, lub koob yees duab txheem thaum lub koob yees duab tsis siv neeg nce mus rau qhov siab tshaj plaws, Lub suab nrov yuav tsum nyob ntawm 10IRE, yog li nws tuaj yeem muab 3: 1 lossis 10dB teeb liab-rau-nruj piv tau txais cov duab. Qhov txiaj ntsig ntsuas ntawm 10 IRE tuaj yeem yog 10 npaug siab dua qhov txiaj ntsig ntsuas ntawm 100 IRE, yog li qhov txiaj ntsig tsis muaj qhov ntsuas IRE yog qhov ua tau zoo. Thaum ambient illuminance txo, ob qho tib si video amplitude thiab tus nqi IRE txo raws li. Thaum kuaj xyuas lub teeb pom kev zoo ntawm lub koob yees duab, tus nqi IRE tej zaum yuav qis, tab sis nws yuav tsum tau ua kom ntseeg tau tias cov yeeb yaj kiab tso tawm tseem muaj txiaj ntsig. Tom qab nkag siab txog qhov tsis zoo ntawm cov teeb pom kev tsawg ntawm cov duab, dab tsi yog cov theem ntawm cov teeb pom kev tsawg?

 

Qhov Low light mode nyob rau hauv lub koob yees duab yog dab tsi?

Lub Teeb Tsawg yog hais txog qhov qis-teeb tua hom. Tsawg illumination yog hais txog qhov xwm txheej uas lub teeb nyob rau hauv qhov chaw tua yog qhov tsaus ntuj. Hauv qhov no, yog tias hom kev tua ib txwm muaj, daim duab yuav plam. Txhawm rau txhim kho qhov kev ua tau zoo ntawm lub teeb qis ntawm lub koob yees duab hauv qhov tsaus ntuj, cov khoom lag luam loj tau siv zog rau hauv cov lus qhia hauv qab no. Lens: Raws li ib feem tseem ceeb ntawm lub koob yees duab, nws yog thawj qhov nkag rau lub teeb nkag mus rau hauv lub koob yees duab, thiab qhov ntau npaum li cas ntawm lub teeb nws absorbs ncaj qha txiav txim qhov tseeb ntawm daim duab. Feem ntau, tus nqi ntawm "lub teeb tuaj" yog siv los ntsuas lub peev xwm ntawm lub lens kom nqus tau lub teeb, thiab qhov ntau npaum li cas ntawm lub teeb nkag mus rau lub lens tuaj yeem qhia tau los ntawm tus nqi F (stop coefficient). F tus nqi = f (lens focal length) / D (lens zoo aperture), uas yog inversely proportional to the aperture and proportional to the focal length. Nyob rau hauv cov xwm txheej ntawm tib lub focal ntev, yog tias koj xaiv lub lens nrog lub aperture loj dua, lub teeb nkag mus rau lub lens yuav nce, uas yog, koj yuav tsum xaiv lub lens nrog tus nqi F me dua.

 

Cov duab sensor yog qhov thib ob nkag rau lub teeb nkag mus rau lub koob yees duab, qhov twg lub teeb nkag los ntawm lub lens yuav tsim hluav taws xob teeb liab. Tam sim no, muaj ob lub ntsiab sensors, CCD thiab CMOS. Cov txheej txheem tsim khoom ntawm CCD yog qhov nyuaj thiab cov thev naus laus zis yog monopolized hauv ob txhais tes ntawm ntau lub tuam txhab Japanese. Nta ntawm tus nqi qis, kev siv hluav taws xob tsawg thiab kev sib koom ua ke siab. Txawm li cas los xij, nrog kev txhim kho txuas ntxiv ntawm CMOS thev naus laus zis, qhov sib txawv ntawm CCD thiab CMOS tau maj mam nqaim. Lub cim tshiab ntawm CMOS tau txhim kho zoo heev rau qhov tsis muaj qhov rhiab heev thiab tau dhau los ua qhov tseem ceeb hauv kev ua haujlwm ntawm cov koob yees duab siab. Low-light network high-txhais lub koob yees duab yeej ib txwm siv high-sensitivity CMOS sensors. Tsis tas li ntawd, qhov loj ntawm lub sensor tseem yuav cuam tshuam rau nws cov nyhuv qis. Nyob rau hauv tib lub teeb pom kev zoo, qhov me me, qhov ua rau lub teeb qis dua ntawm lub koob yees duab nrog pixels siab dua.

Yog tias koj txaus siab rau Hampo 03-0318 hnub qub qiblow light camera module, txais tos sab laj nrog peb!