On Feb. 28, the meeting for technical acceptance of  Research on the large aperture active optics sub- millimeter /millimeter telescope scheme and its key technologies, which is major project supported by National Natural Science Foundation of China(NSFC)  , was held in Nanjing Institute of Astronomical Optics and Technology (NIAOT).

 　 Leaders and experts invited from NSFC, Nanjing University (NJU), Purple Mountain Orvatory (PMO), Xinjiang Astronomical Observatory (XAO) and National Astronomical Observatories (NAO), together with Prof. Xiangqun Cui(CAS Academician),  Prof. Yongtian Zhu( Director  of NIAOT) joined in this meeting.

　  Prof. Guoping Li(project leader and NIAOT Deputy Director) reported the executive condition of the project, and achievements on technical innovation, patent, document, personal training, international communication and cooperation.

　   Prof. Yingxi Zuo from PMO, leader of the test expert group for the project acceptance meeting, reported the on-site test results. The whole expert group carefully examined the contents of the project prospective study, experimental results and relative technical data, and inspected on-site the experimental prototype and panel test equipment. All the experts agreed that all the technical achievements from the project will bring important key technical support for constructing high precision large aperture sub-millimeter / millimeter telescope.

　  Prof. Yongtian Zhu, representing the NIAOT, appreciated the experts’ confirmation of project achievements, and substantial support from NSFC on new astronomical technology and astronomical key technology study, etc. Prof. Zhu also expressed that we still should carry out further engineering study based on these achievements, and prepare well for the actual application.

　  The major project, research on the large aperture active optics sub-millimeter / millimeter scheme and it key technologies, is to prepare well for the China’s technical ability in future construction of thirty meter sub-millimeter telescope with observation wavelength up to 0.2mm and 100m millimeter telescope with observation wavelength up to 3mm. During the study, an experimental prototype, appropriate for sub-millimeter waveband antenna, was developed, with a surface error less than 5microns of each 650mm×650mm panel.

　  The prototype system firstly realized the segmentation of four panels with a co-phasing precision of 12microns in China, and also firstly autonomously developed the electromechanical micrometric displacement actuator with a resolution of 10nm in China.