Lub kaum sab xis ntawm lub lens yog lub kaum sab xis ntawm lub lens thiab lub lens chief ray. Lub lens chief ray yog lub teeb uas hla dhau qhov aperture nres ntawm lub optical system thiab kab ntawm lub qhov nkag ntawm lub qhov muag thiab qhov khoom taw tes. Qhov laj thawj rau qhov muaj CRA hauv Image Sensor yog tias muaj FOV (Thaj chaw pom) ntawm Mirco Lens ntawm qhov chaw ntawm Image Sensor, thiab tus nqi ntawm CRA nyob ntawm tus nqi yuam kev kab rov tav ntawm Micro Lens ntawm Image Sensor thiab qhov chaw ntawm silicon photodiode. Lub hom phiaj yog kom phim lub lens zoo dua.
Lub lens lub kaum sab xis tseem ceeb
Kev xaiv CRA sib phim ntawm Lens & Image Sensor tuaj yeem ua kom muaj kev ntes cov photons rau hauv silicon photodiodes kom raug dua, yog li txo cov teeb meem optical crosstalk.
Rau cov duab sensors nrog cov pixels me me, lub kaum sab xis tseem ceeb tau dhau los ua qhov tseem ceeb. Qhov no yog vim tias lub teeb yuav tsum mus dhau qhov tob ntawm lub pixel kom mus txog silicon photodiode ntawm qab ntawm pixel, uas pab ua kom muaj ntau lub teeb uas mus rau hauv photodiode thiab txo cov teeb uas mus rau hauv silicon photodiode ntawm ib lub pixel uas nyob ib sab (Tsim kev sib txuas lus pom kev).
Yog li ntawd, thaum lub koob yees duab xaiv lub lens, nws tuaj yeem nug tus neeg tsim khoom Image Sensor & lub koob yees duab chaw tsim khoom rau CRA nkhaus rau kev sib phim; feem ntau nws raug pom zoo tias qhov sib txawv ntawm CRA lub kaum sab xis ntawm Image Sensor thiab lub lens yuav tsum tswj tau hauv +/- 3 degrees, tau kawg, qhov Pixel me dua, qhov siab dua qhov xav tau.
Cov teebmeem ntawm lub lens CRA thiab lub sensor CRA tsis sib xws:
Qhov tsis sib xws ua rau muaj kev sib tshuam ua rau muaj kev tsis sib npaug ntawm cov xim thoob plaws hauv daim duab, ua rau muaj kev txo qis ntawm qhov sib piv ntawm lub teeb liab thiab lub suab nrov (SNR); raws li CCM xav tau kev nce qib digital kom them rau qhov poob ntawm lub teeb liab hauv photodiode.
Cov teebmeem ntawm lub lens CRA thiab lub sensor CRA mismatch
Yog tias CRA tsis sib xws, nws yuav ua rau muaj teeb meem xws li cov duab tsis meej, pos huab, qhov sib piv qis, cov xim ploj mus, thiab qhov tob ntawm daim teb txo qis.
Lub lens CRA me dua li lub Image Sensor CRA yuav tsim cov xim shading.
Yog tias Lub Sensor Duab me dua li lub lens CRA, Lens shading yuav tshwm sim.
Yog li peb yuav tsum xub xyuas kom meej tias Xim shading tsis tshwm sim, vim tias Lens shading yooj yim dua los daws los ntawm kev debugging dua li Xim shading.
Duab Sensor thiab lens CRA
Nws tuaj yeem pom los ntawm daim duab saum toj no tias TTL ntawm lub lens kuj yog qhov tseem ceeb rau kev txiav txim siab lub kaum sab xis CRA. Qhov qis dua TTL, qhov loj dua lub kaum sab xis CRA. Yog li ntawd, lub sensor duab nrog cov pixels me me kuj tseem ceeb heev rau lub lens CRA sib phim thaum tsim lub koob yees duab system.
Feem ntau, lub lens CRA tsis phim lub Image sensor CRA rau ntau yam laj thawj. Nws tau pom los ntawm kev sim tias cov lens CRA nkhaus nrog lub hau tiaj tus (qhov tsawg kawg nkaus tig) muaj kev kam rau siab dua ntawm cov koob yees duab module sib dhos sib txawv dua li cov CRA nkhaus.
Lub lens CRA tsis phim lub Image sensor CRA rau ntau yam laj thawj.
Cov duab hauv qab no qhia cov piv txwv ntawm cov CRAs tiaj tus thiab cov CRAs nkhaus.
Piv txwv ntawm cov CRAs tiaj tus thiab cov CRAs nkhaus
Yog tias CRA ntawm lub lens txawv ntawm CRA ntawm lub sensor duab, cov xim yuav tshwm sim raws li qhia hauv daim duab hauv qab no.
Cov xim av tshwm sim
Lub sijhawm tshaj tawm: Lub Ib Hlis-05-2023
