Ho fihlela botsitso bo phahameng ba mocheso, lense ena e entsoe ka ho sebelisa Khalase ea Chalcogenide e bōpiloeng ka nepo (ho fapana le Germanium ea setso). Coefficient e ikhethang ea mocheso oa refractive index (dn/dt) ea khalase ea Chalcogenide, e kopantsoeng le moralo o tsoetseng pele oa optical, e lefella ho tlosoa ha thermal ka bohona. Sena se tiisa hore lesoba le leholo la F1.0 le fana ka litšoantšo tse bohale tse phahameng tsa mocheso tse lulang li le teng serameng se matla kapa mochesong, ho tloha ho -40°C ho isa ho +80°C.
Bolelele ba maqhubu bo 'nile ba shebana le ho fana ka lihlahisoa tsa mahlo tse nepahetseng haholo ka lilemo tse 20