▁transm itted ▁by ▁the ▁device . ▁Because ▁the ▁angle ▁of ▁inc idence ▁at ▁the ▁gap ▁can ▁be ▁reason ably ▁close ▁to ▁B rew ster ' s ▁angle , ▁unw anted ▁reflection ▁of ▁p - pol ar ized ▁light ▁is ▁reduced , ▁giving ▁the ▁G lan – T aylor ▁pr ism ▁better ▁transmission ▁than ▁the ▁G lan – F ou ca ult ▁design . ▁Note ▁that ▁while ▁the ▁transm itted ▁beam ▁is ▁completely ▁polar ized , ▁the ▁reflected ▁beam ▁is ▁not . ▁The ▁sides ▁of ▁the ▁cry stal ▁can ▁be ▁pol ished ▁to ▁allow ▁the ▁reflected ▁beam ▁to ▁exit ▁or ▁can ▁be ▁black ened ▁to ▁abs orb ▁it . ▁The ▁latter ▁reduces ▁unw anted ▁F res nel ▁reflection ▁of ▁the ▁rejected ▁beam . ▁ ▁A ▁variant ▁of ▁the ▁design ▁exists ▁called ▁a ▁G lan – las er ▁pr ism . ▁This ▁is ▁a ▁G lan – T aylor ▁pr ism ▁ ▁with ▁a ▁ste eper ▁angle ▁for ▁the ▁cut ▁in ▁the ▁pr ism , ▁which ▁decre ases ▁reflection ▁loss ▁at ▁the ▁exp ense ▁of ▁reduced ▁angular ▁field ▁of ▁view . ▁These ▁polar izers ▁are ▁also ▁typically ▁designed ▁to ▁toler ate ▁very ▁high ▁beam ▁intens ities , ▁such ▁those ▁produced ▁by ▁a ▁las er . ▁The ▁differences ▁may ▁include ▁using ▁cal cite ▁selected ▁for ▁low ▁scatter ing ▁loss , ▁improved ▁pol ish ▁quality ▁on ▁the ▁faces ▁and ▁especially ▁on ▁the ▁sides ▁of ▁the ▁cry stal , ▁and ▁better ▁ant ire f lection ▁coat ings . ▁Pr isms ▁with ▁ir rad iance ▁damage ▁th resh olds