Fast Steering Mirrors (FSM) e tu'ufa'atasia a tatou tomai fa'ainisinia, fa'apitoa, ma fa'aeletonika e tu'uina atu ai se faiga fa'apipi'i fa'apipi'i e ofoina atu se fa'amau,
fofo maualuga-faatinoga mo suʻesuʻega mataʻitusi tasi ma tele-axis ma faʻamautu faʻaoga talosaga.