22/02/25I-Quantum Efficiency (QE) yenzwa ibhekisela emathubeni ama-photon ashaya inzwa atholwe ngo-%. I-QE ephezulu iholela kukhamera ebucayi kakhulu, ekwazi ukusebenza ezimeni eziphansi zokukhanya. I-QE futhi incike kubude begagasi, i-QE evezwe njengenombolo eyodwa ngokuvamile ibhekisela enanini eliphakeme.
Uma ama-photon eshaya iphikseli yekhamera, iningi lizofinyelela endaweni ezwela ukukhanya, futhi libonakale ngokukhipha i-electron kunzwa ye-silicon. Kodwa-ke, amanye ama-photon azomuncwa, abonakale, noma asakazwe yizinto zenzwa yekhamera ngaphambi kokuthi kutholakale. Ukusebenzisana phakathi kwama-photon nezinto zenzwa yekhamera kuncike kubude be-photon be-wavelength, ngakho-ke amathuba okutholwa ancike kubude begagasi. Lokhu kuncika kuboniswa ku-Quantum Efficiency Curve yekhamera.
Isibonelo sejika le-Quantum Efficiency. Okubomvu: I-CMOS ekhanyiswe ngemuva. Okuhlaza okwesibhakabhaka: I-CMOS ekhanyisiwe ohlangothini lwangaphambili oluthuthukisiwe
Izinzwa zekhamera ezihlukene zingaba nama-QE ahluke kakhulu kuye ngokuklama kwazo nezinto zokwakha. Umthelela omkhulu ku-QE ukuthi ingabe inzwa yekhamera ingemuva noma ohlangothini olungaphambili lukhanyisiwe. Kumakhamera akhanyayo ohlangothini olungaphambili, ama-photon avela esihlokweni kufanele aqale adlule kugridi yezintambo ngaphambi kokuba abonakale. Ekuqaleni, lawa makhamera ayelinganiselwe ekusebenzeni kahle kwe-quantum cishe kwe-30-40%. Ukwethulwa kwama-microlens ukuze kugxiliswe ukukhanya kudlule izintambo ku-silicon ezwela ukukhanya kukhuphule lokhu cishe ku-70%. Amakhamera esimanje anokukhanya ngaphambili angafinyelela inani eliphakeme lama-QE acishe abe ngu-84%. Amakhamera akhanyiswe ngemuva ahlehlisa lo mklamo wenzwa, ama-photon ashaya ngokuqondile ungqimba olubona ukukhanya oluncane lwe-silicon, ngaphandle kokudlula ezintanjeni. Lezi zinzwa zamakhamera zinikeza ukusebenza okuphezulu kwe-quantum cishe ukuphakama okungama-95%, ngezindleko zenqubo yokukhiqiza ejulile nemba eqolo.
I-Quantum Efficiency ngeke ihlale iyisici esibalulekile ohlelweni lwakho lokuthwebula izithombe. Kuzinhlelo zokusebenza ezinamaleveli okukhanya aphezulu, i-QE eyengeziwe nokuzwela kunikeza inzuzo encane. Kodwa-ke, emfanekisweni wokukhanya okuphansi, i-QE ephezulu ingaveza isilinganiso esithuthukisiwe sesignali-kuya-nomsindo kanye nekhwalithi yesithombe, noma izikhathi zokuchayeka ezincishisiwe zokuthatha isithombe esisheshayo. Kodwa izinzuzo zokusebenza kahle kwe-quantum kufanele futhi zikalwe ngokunyuka kwama-30-40% entengo yezinzwa ezikhanyiselwe emuva.
