Babban kusurwar hasken ruwan tabarau shine kwana tsakanin axis na gani da babban hasken ruwan tabarau. Babban hasken ruwan tabarau shine hasken da ke wucewa ta wurin tsayawar buɗaɗɗen na'urar gani da layin da ke tsakanin cibiyar ƙofar ɗalibi da wurin abin. Dalilin kasancewar CRA a cikin Sensor na Hoto shine cewa akwai FOV (Filin gani) akan Mirco Lens akan saman Ma'aunin Hoton, kuma ƙimar CRA ya dogara da ƙimar kuskure a kwance tsakanin Micro Lens. na Hoton Sensor da matsayi na silicon photodiode. Manufar ita ce ta fi dacewa da ruwan tabarau.
The ruwan tabarau shugaban ray kwana
Zaɓin madaidaicin CRA na Lens & Sensor Hoto na iya tabbatar da ingantaccen ɗaukar hoto na photons zuwa silicon photodiodes, ta haka yana rage ƙwanƙwasa maganan gani.
Don na'urori masu auna hoto tare da ƙananan pixels, babban kusurwar ray ya zama muhimmin ma'auni. Wannan shi ne saboda hasken dole ne ya bi ta zurfin pixel don isa ga silicon photodiode a kasan pixel, wanda ke taimakawa wajen kara yawan hasken da ke shiga cikin photodiode kuma yana rage yawan hasken da ke shiga cikin siliki. photodiode na pixel kusa (Ƙirƙirar crosstalk na gani).
Don haka, lokacin da firikwensin Hoto ya zaɓi ruwan tabarau, zai iya tambayar mai ƙera Hoton Sensor & masana'anta ruwan tabarau don madaidaicin CRA don daidaitawa; ana ba da shawarar cewa bambancin kusurwar CRA tsakanin Hoton Sensor da ruwan tabarau za a sarrafa su a cikin +/-3 digiri, ba shakka, ƙarami Pixel, mafi girma da ake bukata.
Tasirin ruwan tabarau CRA da rashin daidaituwa na firikwensin CRA:
Sakamakon rashin daidaituwa a cikin maganganu yana haifar da rashin daidaituwar launi a cikin hoton, yana haifar da raguwa a cikin sigina-zuwa-amo (SNR); kamar yadda CCM ke buƙatar ƙarin riba na dijital don rama asarar sigina a cikin photodiode.
Tasirin ruwan tabarau CRA da rashin daidaituwa na firikwensin CRA
Idan CRA ba ta yi daidai ba, zai haifar da matsaloli irin su faifan hotuna, hazo, ƙarancin bambanci, launuka masu shuɗewa, da rage zurfin filin.
Lens CRA ya fi karami fiye da Hoton Sensor CRA zai samar da inuwa mai launi.
Idan Hoton Sensor ya fi ƙarami fiye da ruwan tabarau CRA, shading Lens zai faru.
Don haka dole ne mu fara tabbatar da cewa launin launi ba ya bayyana, saboda shading Lens ya fi sauƙi don warwarewa ta hanyar gyarawa fiye da launi na launi.
Sensor Hoto da ruwan tabarau CRA
Ana iya gani daga hoton da ke sama cewa TTL na ruwan tabarau kuma shine mabuɗin don ƙayyade kusurwar CRA. Ƙananan TTL, mafi girman kusurwar CRA. Saboda haka, na'urar firikwensin hoto tare da ƙananan pixels shima yana da matukar mahimmanci ga ruwan tabarau na CRA daidai lokacin zayyana tsarin kyamara.
Sau da yawa, ruwan tabarau CRA bai dace daidai da firikwensin Hoton CRA ba saboda dalilai daban-daban. An lura da gwaji cewa ruwan tabarau CRA masu lankwasa tare da saman lebur (mafi ƙarancin juyawa) sun fi haƙuri ga bambance-bambancen haɗin haɗin tsarin kyamara fiye da CRAs masu lanƙwasa.
CRA ruwan tabarau bai dace daidai da firikwensin Hoton CRA ba saboda dalilai daban-daban
Hotunan da ke ƙasa suna nuna misalan saman lebur da CRAs masu lanƙwasa.
Misalai na saman lebur da CRAs masu lanƙwasa
Idan CRA na ruwan tabarau ya bambanta da CRA na firikwensin hoton, simintin launi zai bayyana kamar yadda aka nuna a hoton da ke ƙasa.
Simintin launi ya bayyana
Lokacin aikawa: Janairu-05-2023
