Xi’an Institute of Optics and Precision Mechanics;
Chinese Academy of Sciences;
Xi’an 710119;
China;
Nanjing Astronomical Instruments;
Chinese Academy of Sciences;
Nanjing 210042;
China;
National Astronomical Observatories;
Chinese Academy of Sciences;
Beijing 100101;
China;
telescopes; techniques:interferometric; methods:astronomical instrumentation; methods and techniques;