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Kev paub txog lub lens tsis (kab lus no tuaj yeem muab faib ua ib lossis ob qho raws li cov ntsiab lus)

1. Daim duab loj

Cov duab loj kuj yog qhov screen loj;

Duab loj ntawm sensor:

Txuas ntxiv mus siv tus qauv qauv loj ntawm lub koob yees duab raj, nws yog qhov loj me me ntawm lub koob yees duab raj.

2.Focal ntev

Lub tswv yim hais txog qhov kev ncua deb ntawm qhov chaw ntawm lub lens mus rau lub focal point ntawm lub teeb sib sau ua ke.Nws kuj yog qhov kev ncua deb ntawm qhov chaw ntawm lub lens mus rau lub dav hlau imaging ntawm lub sensor nto nyob rau hauv lub module.Qhov focal ntev yog ib qho tseem ceeb heev. cov ntaub ntawv, thiab nws yuav siv rau hauv kev xam qhov tob ntawm qhov chaw thiab FOV yav tom ntej.

3. Kev xav

Muaj peb hom lo ntsiab muag: standard, wide-angle, thiab telephoto lens.

Txawm hais tias thaj chaw uas tib neeg lub qhov muag pom tuaj yeem ncav cuag 180 degrees, lub kaum sab xis uas tuaj yeem paub txog cov duab thiab xim tiag tiag yog li 50 degrees. Feem ntau, lub kaum sab xis saib ntawm lub vaj huam sib luag kov yog 55 degrees txog 65 degrees.Tau kawg, nws yuav tsum ua raws li qhov xav tau tiag tiag ntawm cov neeg siv khoom; Pom txoj cai, Lens manufacturers vam tias yuav tsim qhov loj dua ntawm kev pom uas tuaj yeem tsim nyog rau ntau lub sensors, tab sis qhov loj dua qhov kev pom, ntau dua qhov chromatic aberration uas xav tau. kom kov yeej.

4.Chromatic aberration

Lub lens yees duab tsis tuaj yeem kho qhov taw tes lossis cov duab sib xyaw-wavelength rau ib qho taw tes, tab sis qhov chaw fuzzy diffuse;daim duab ntawm cov khoom dav hlau tsis yog lub dav hlau, tab sis ib qho chaw nkhaus, thiab cov duab tau poob qhov zoo sib xws.Cov duab tsis xws luag no hu ua chromatic aberrations.

5.Qhov tob ntawm teb & qhov tob ntawm kev tsom

(1) Qhov tob ntawm qhov teb & qhov tob ntawm kev tsom
Ua ntej thiab tom qab ua kom pom tseeb, lub teeb pib sib sau ua ke thiab diffuse, thiab cov duab ntawm qhov taw tes ua qhov muag plooj, tsim lub voj voog loj.Lub voj voog no hu ua lub voj voog ntawm kev tsis meej pem.

Hauv kev muaj tiag, cov duab ntes tau pom nyob rau hauv ib txoj kev (xws li projection, magnification rau hauv daim duab, thiab lwm yam).Cov duab xav tau los ntawm qhov muag liab qab muaj kev sib raug zoo nrog kev nthuav dav, qhov kev ncua deb thiab pom qhov deb.Yog hais tias txoj kab uas hla ntawm lub voj voog ntawm kev tsis meej pem yog me dua qhov muaj peev xwm ntawm kev ntxub ntxaug ntawm tib neeg lub qhov muag, qhov muag plooj uas tsim los ntawm cov duab tiag tiag hauv cov txheeb ze tsis tuaj yeem lees paub.Lub voj voog tsis meej pem no yog hu ua lub voj voog uas tsis meej pem.

(2) qhov tob ntawm qhov chaw
Muaj ib lub voj voog uas tsis meej pem ua ntej thiab tom qab lub focal point, thiab qhov kev ncua deb ntawm ob lub voj voog ntawm kev tsis meej pem yog hu ua qhov tob ntawm kev tsom.Ua ntej thiab tom qab cov ntsiab lus (focus point), daim duab tseem muaj qhov pom tseeb, uas yog qhov tob ntawm qhov chaw.Hauv lwm lo lus, sab pem hauv ntej thiab nram qab qhov tob ntawm qhov kev kawm thiab qib ntawm cov duab plooj ntawm qhov chaw ntawm zaj duab xis yog tag nrho nyob rau hauv qhov txwv ntawm lub voj voog uas tso cai tsis meej pem.
Qhov tob ntawm qhov chaw sib txawv nrog qhov ntev ntawm lub lens, tus nqi aperture, thiab qhov deb ntawm kev tua.Rau qhov ntev focal ntev thiab kev tua nyob deb, qhov me dua qhov siv aperture, qhov tob ntawm qhov ntau dua.Lub hauv paus ntsiab lus ntawm myopic hlub squinting.

(3) Piv txwv
Case Study, CNF7246, Lens DS628A
Parameter, EFL = 2.94mm FNO = 2.0 SENSOR PIXEL LOJ = 1.75um

(4) Vcm qee qhov tsis zoo tsom qhov tshwm sim
Tsis pom zoo nyob ze
Thaum tsim lub Holder, lub nraub qaum tsom stroke ntawm lub lens los ntawm deb mus rau ze yuav nyob rau hauv qhov ntau ntawm VCM.Yog hais tias qhov siab ntawm lub Holder tsis tsim zoo, ib tug tuav ntawm lub lens nyob ze ntawm kev tsom xam yuav tshwm sim, ua rau tsis zoo nyob ze ntawm kev tsom xam.

6.Distortion

Qhov hu ua distortion yog hais txog qib uas txoj kab ncaj nraim tig mus rau hauv qhov nkhaus tom qab tua los ntawm lub lens.Lub degree ntawm distortion yog xam raws li qhov feem pua ​​ntawm cov kev hloov nyob rau hauv imaging loj rau qhov zoo tagnrho imaging loj.Qhov kev daws teeb meem ntawm tib neeg lub qhov muag rau lub kaum sab xis yog 1 feeb ntawm radian, uas yog hais txog 1/60 ntawm 1 degree, thiab nws yog heev. rhiab rau qhov ncaj thiab curvature ntawm kab.Yog li ntawd, feem ntau optical imaging lo ntsiab muag muaj kev txhawj xeeb heev txog qhov sib txawv ntawm lub teb lub kaum sab xis ntawm lub magnification, feem ntau yog teem rau 2%.

7.Txiv neej illuminance

Lub tswv yim, qhov sib piv ntawm qhov pom ntawm qhov pom ntawm qhov muag pom ntawm qhov pom ntawm qhov pom ntawm lub dav hlau pom, uas yog, qhov sib piv ntawm kab pheeb ces kaum ntawm cov duab sensor mus rau nruab nrab illuminance, tus nqi no yog txwv los ntawm cos4θ theorem ntawm illuminance, thiab cov ces kaum yog chav tsev Lub luminous flux ntawm lub luminous flux yog tsawg, tab sis tsis yog li ntawd tsawg uas muaj ib tug phenomenon ntawm vignetting.


Post lub sij hawm: Oct-08-2021