Kodi Chief Ray Angle ndi chiyani

The lens chief ray angle ndi ngodya pakati pa optical axis ndi lens chief ray.Kuwala kwa lens ndi kuwala komwe kumadutsa poyimitsa makina a optical system ndi mzere pakati pa khomo la wophunzira ndi malo a chinthu.Chifukwa cha kukhalapo kwa CRA mu Image Sensor ndikuti pali FOV (Field of view) pa Mirco Lens pamwamba pa Image Sensor, ndipo mtengo wa CRA umadalira mtengo wolakwika wopingasa pakati pa Micro Lens. ya Image Sensor ndi malo a silicon photodiode.Cholinga chake ndikufananiza bwino ma lens.

The lens chief ray angle

Kusankha CRA yofananira ya Lens&Image Sensor kutha kuwonetsetsa kujambulidwa kolondola kwa mafotoni mu silicon photodiodes, potero kuchepetsa kuwombana kwamaso.

Kwa masensa azithunzi okhala ndi ma pixel ang'onoang'ono, mbali yayikulu ya ray yakhala gawo lofunikira.Izi zili choncho chifukwa kuwala kumayenera kudutsa mukuya kwa pixel kuti ifike pa silicon photodiode pansi pa pixel, zomwe zimathandiza kuwonjezera kuchuluka kwa kuwala komwe kumalowa mu photodiode ndikuchepetsa kuwala komwe kumapita mu silicon. photodiode ya pixel yoyandikana (Kupanga optical crosstalk).

Chifukwa chake, sensa ya Zithunzi ikasankha mandala, imatha kufunsa wopanga Sensor ya Zithunzi & wopanga magalasi kuti apangire curve ya CRA yofananira;nthawi zambiri timalimbikitsa kuti kusiyana kwa angle ya CRA pakati pa Image Sensor ndi mandala aziwongoleredwa mkati mwa +/-3 madigiri, ndithudi, Pixel yaying'ono, ndiye kuti chofunika kwambiri.

Zotsatira za lens CRA ndi sensa CRA yosagwirizana:

Kusagwirizana kumapangitsa kuti pakhale kusagwirizana kwamitundu pazithunzi zonse, zomwe zimapangitsa kuti chiŵerengero cha signal-to-noise chichepe (SNR);popeza CCM imafuna kuchulukitsidwa kwa digito kuti ibwezere kutayika kwa chizindikiro mu photodiode.

Zotsatira za lens CRA ndi sensa CRA yosagwirizana

Ngati CRA sikugwirizana, zingayambitse mavuto monga zithunzi zosaoneka bwino, chifunga, kusiyana kochepa, mitundu yozimiririka, ndi kuchepetsedwa kwa malo.

Lens CRA ndi yaying'ono kuposa Image Sensor CRA imatulutsa mtundu wamtundu.

Ngati Image Sensor ndi yaying'ono kuposa CRA ya mandala, mthunzi wa lens udzachitika.

Choncho tiyenera choyamba kuonetsetsa kuti mtundu wa shading sikuwoneka, chifukwa mthunzi wa Lens ndi wosavuta kuthetsa mwa kusokoneza kusiyana ndi Colour shading.

Sensor ya zithunzi ndi mandala CRA

Zitha kuwoneka kuchokera pachithunzi pamwambapa kuti TTL ya mandala ndiyonso chinsinsi chodziwira mbali ya CRA.Kutsika kwa TTL, kumakulitsa ngodya ya CRA.Chifukwa chake, sensa yazithunzi yokhala ndi ma pixel ang'onoang'ono ndiyofunikanso kwambiri pakufananiza ndi mandala a CRA popanga makina a kamera.

Nthawi zambiri, mandala a CRA samafanana ndendende ndi sensa ya Image CRA pazifukwa zosiyanasiyana.Zawonedwa moyesera kuti ma curve a lens CRA okhala ndi nsonga yathyathyathya (pang'ono pang'ono) amalekerera kusintha kwa ma module a kamera kuposa ma CRA opindika.

Magalasi a CRA samafanana ndendende ndi sensa ya Image CRA pazifukwa zosiyanasiyana

Zithunzi zomwe zili pansipa zikuwonetsa zitsanzo za ma CRA apamwamba komanso opindika.

Zitsanzo za ma CRA apamwamba komanso opindika

Ngati CRA ya mandala ndi yosiyana kwambiri ndi CRA ya sensa ya chithunzi, mawonekedwe amtundu adzawonekera monga momwe tawonetsera pachithunzichi.

Kujambula kwamtundu kumawonekera