I-expander ye-beam expander eqhelekileyo ifumaneka kwi-telescope yaseGalilean edla ngokuba ne-lens enye yokungenisa engalunganga kunye nelens enye yokukhupha echanekileyo. Ilens yokungenisa inika ingqwalasela ye-beam ebonakalayo kwimveliso. Kwimilinganiselo yokwandisa ephantsi, i-telescope yaseGalilean idla ngokusetyenziswa ngenxa yobulula, ubungakanani bephakheji encinci kunye nexabiso eliphantsi. I-beam expander zisetyenziswa rhoqo ukukhulisa ububanzi be-laser obuza kubuyiselwa kubungakanani obuncinci bendawo.
Ubude be-wavelength bugxile ekuboneleleni ngeemveliso zokukhanya ezichanekileyo kakhulu kangangeminyaka engama-20