简介:Wereportamethodforsimultaneouslyanddirectlymeasuringallsix-degrees-of-freedom(six-DOF)motionerrorsofarotaryaxis.Suchamethodcombinestheprinciplesoflaserinterferometryandlasercollimationmeasurement.Onereferencerotaryaxisandtworetro-reflectorsareusedtoachievesimultaneoussensitivitytoallsixerrorsinafull-circlemeasuringrange.Asnoseparationmodelsarerequired,ourmethodiscapableofdynamicallymeasuringtheseerrorsinrealtimeandconvenientlydeterminingtheoriginoftheerrors.Anautomaticmeasuringdeviceisbuilt.Theeffectivenessofourmethodisexperimentallydemonstrated.