Kusurwar hasken ruwan tabarau ita ce kusurwar da ke tsakanin axis na gani da kuma babban hasken ruwan tabarau. Babban hasken ruwan tabarau ita ce hasken da ke ratsa ta tasha ta buɗewar tsarin gani da kuma layin da ke tsakanin tsakiyar ɗalibin shiga da wurin abu. Dalilin wanzuwar CRA a cikin Na'urar Firikwensin Hoto shine akwai FOV (Field of view) akan Ruwan Mirco a saman Na'urar Firikwensin Hoto, kuma ƙimar CRA ta dogara ne akan ƙimar kuskuren kwance tsakanin Micro Lens na Na'urar Firikwensin Hoto da matsayin silicon photodiode. Manufar ita ce a daidaita ruwan tabarau da kyau.
Kusurwar hasken shugaban ruwan tabarau
Zaɓar CRA mai dacewa na Lens&Image Sensor zai iya tabbatar da ɗaukar hotunan photons cikin silikon photodiodes daidai, ta haka rage magana ta gani.
Ga na'urori masu auna hotuna masu ƙananan pixels, kusurwar hasken gaba ta zama muhimmiyar ma'auni. Wannan saboda hasken dole ne ya ratsa zurfin pixel ɗin don isa ga photodiode na silicon a ƙasan pixel ɗin, wanda ke taimakawa wajen ƙara yawan hasken da ke shiga kai tsaye cikin photodiode kuma yana rage adadin hasken da ke shiga cikin photodiode na silicon na pixel ɗin da ke kusa (Ƙirƙirar haɗin kai na gani).
Saboda haka, lokacin da na'urar firikwensin hoto ta zaɓi ruwan tabarau, zai iya tambayar mai ƙera na'urar firikwensin hoto da mai ƙera ruwan tabarau don lanƙwasa CRA don daidaitawa; gabaɗaya ana ba da shawarar cewa bambancin kusurwar CRA tsakanin na'urar firikwensin hoto da ruwan tabarau ya kasance cikin digiri +/-3, ba shakka, idan ƙaramin Pixel ɗin ya fi haka, mafi girman buƙatar.
Tasirin rashin daidaiton ruwan tabarau na CRA da firikwensin CRA:
Rashin daidaito yana haifar da magana ta hanyar magana ta hanyar sadarwa wanda ke haifar da rashin daidaiton launi a cikin hoton, wanda ke haifar da raguwar rabon sigina zuwa hayaniya (SNR); kamar yadda CCM ke buƙatar ƙarin riba ta dijital don rama asarar sigina a cikin photodiode.
Tasirin rashin daidaiton ruwan tabarau na CRA da firikwensin CRA
Idan CRA bai yi daidai ba, zai haifar da matsaloli kamar hotuna marasa haske, hazo, ƙarancin bambanci, launuka masu duhu, da kuma raguwar zurfin filin.
Ruwan tabarau na CRA ya fi ƙanƙanta fiye da na'urar hangen nesa ta Image Sensor CRA za ta samar da launin launi.
Idan Na'urar Firikwensin Hoto ta fi ƙanƙanta fiye da ruwan tabarau na CRA, za a sami inuwa ta ruwan tabarau.
Don haka dole ne mu fara tabbatar da cewa launin ba ya bayyana, domin launin ruwan tabarau ya fi sauƙin warwarewa ta hanyar gyara kurakurai fiye da launin launi.
Firikwensin Hoto da ruwan tabarau CRA
Za a iya gani daga hoton da ke sama cewa TTL na ruwan tabarau shi ma shine mabuɗin tantance kusurwar CRA. Mafi ƙarancin TTL, mafi girman kusurwar CRA. Saboda haka, na'urar firikwensin hoto mai ƙananan pixels shima yana da matuƙar mahimmanci don daidaita ruwan tabarau ta CRA lokacin tsara tsarin kyamara.
Sau da yawa, ruwan tabarau na CRA ba ya daidaita daidai da na'urar firikwensin hoto ta CRA saboda dalilai daban-daban. An lura da gwaje-gwaje cewa lanƙwasa na ruwan tabarau na CRA tare da saman lebur (mafi ƙarancin juyawa) sun fi jure wa bambancin haɗuwa da na'urar kyamara fiye da CRA masu lanƙwasa.
Ruwan tabarau na CRA bai yi daidai da na'urar firikwensin hoto ta CRA ba saboda dalilai daban-daban
Hotunan da ke ƙasa suna nuna misalan CRAs masu lebur da kuma masu lanƙwasa.
Misalai na CRAs masu lebur da masu lanƙwasa
Idan CRA na ruwan tabarau ya bambanta da CRA na firikwensin hoto, launukan da aka nuna za su bayyana kamar yadda aka nuna a hoton da ke ƙasa.
Launi ya bayyana
Lokacin Saƙo: Janairu-05-2023
