Study of zero error in large-scale laser interferometric measurement system

Large-scale measurement systems of range over 30m are main traceable devices of dimensional measurement for modern large-scale advanced manufacture domain. High precision large-scale dimensional measurement devices with flexibility and openness are made up of length measurement system, environmental measuring system, guiding rail system and control system. In length measurement system using laser interferometers, zero error should be taken into account. This paper proposed a novel method to eliminate zero error in large-scale laser interferometric measurement system. The uncertainty of this system is improved experimentally.