Guo Youming, Zhang Ang, Fan Xinlong, Rao Changhui, Wei Ling, Xian Hao, Wei Kai, Zhang Xiaojun, Guan Chunlin, Li Min, Zhou Luchun, Jin Kai, Zhang Junbo, Deng Jijiang, Zhou Longfeng, Chen Hao, Zhang Xuejun, Zhang Yudong
Opt Lett. 2016 Dec 15;41(24):5712-5715. doi: 10.1364/OL.41.005712.
We propose using a piezoelectric adaptive secondary mirror (PASM) in the medium-sized adaptive telescopes with a 2-4 m aperture for structure and control simplification by utilizing the piezoelectric actuators in contrast with the voice-coil adaptive secondary mirror. A closed-loop experimental setup was built for on-sky demonstration of the 73-element PASM developed by our laboratory. In this Letter, the PASM and the closed-loop adaptive optics system are introduced. High-resolution stellar images were obtained by using the PASM to correct high-order wavefront errors in May 2016. To the best of our knowledge, this is the first successful on-sky demonstration of the PASM. The results show that with the PASM as the deformable mirror, the angular resolution of the 1.8 m telescope can be effectively improved.
