Fiberopticcollimatorscomeinallsizescommercially.MostofthemarebasedonthesuccessfulGRINlenses,whichfindtheirwayintomanypassiveandactivecomponents.However,GRINlensesarenotverysuitableforvisiblewavelengthsorlargebeam.Ourhighperformancecollimatorsemployhighqualityasphericlensesandachromaticdoubletstoachievelowwave-frontdistortion,lowdivergence,anddiffractionlimitedbeamquality.Large-beamcollimatorsarenotonlyidealforlong-rangetargetshootingbutalsogoodforpaircouplingatlongworkingdistances.Someofourverylarge-beam( 14mm)collimatorshavebeenusedinfree-spaceopticscommunications.Usethesecollimatorswithourstandardlaser-diodelightsource,pigtaileddiodelasers,orreceptaclelaserdiodemodules.Wealsoproducecustomretro-reflectorstopairwithourcollimators.