Ngokuthuthuka okusheshayo komkhakha wezogesi, izidingo zokunemba kokucubungula kanye nekhwalithi yangaphezulu yezingxenye ze-optical enembayo ziya ngokuya zikhuphuka. Izidingo zokuhlanganisa ukusebenza kwama-optical prism zikhuthaza umumo wamaprism ukuya ku-polygonal nomumo ongajwayelekile. Ngakho-ke, idlula kubuchwepheshe bokucubungula bendabuko, ukwakheka okuhlakaniphe kakhulu kokugeleza kokucubungula kubaluleke kakhulu.