1. Ultra-Precision Optoelectronic Instrument Engineering Center, School of Instrument Science and Engineering, and the Key Laboratory of Ultra-Precision Intelligent Instrumentation, Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin, China
2. Unisurf Mechatronics Ltd., Suzhou, China
3. Physikalisch-Technische Bundesanstalt (PTB), Brunswick, Germany