Noriaki MIURA^*, Yuuki NOTO, Shuusuke KATO, Fumihito YOKOYAMA, Susumu KUWAMURA, Naoshi BABA¹, Yoichiro HANAOKA², Shin'ichi NAGATA³, Satoru UENO³, Reizaburou KITAI³, Kiyoshi ICHIMOTO³, and Hideki TAKAMI⁴

Department of Computer Sciences, Kitami Institute of Technology, 165 Koen-cho, Kitami, Hokkaido 090-8507, Japan
¹Department of Applied Physics, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan
²National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
³Hida Observatory, Graduate School of Science, Kyoto University, Kamitakara, Takayama, Gifu 506-1314, Japan
⁴Subaru Telescope, National Astronomical Observatory of Japan, 650 North A'ohoku Place, Hilo, HI 96720, U.S.A.

(Received February 18, 2009; Accepted June 12, 2009)

A solar adaptive optics system has been improved by using a high-speed electromagnetic deformable mirror and adopting a modified sum-of-absolute-differences algorithm in wavefront sensing. Results of laboratory experiments clearly show that the use of the mirror raises the temporal performance of the system. In solar observations, wavefront compensation using solar granules as a target is realized.

Key words: adaptive optics, solar observation

^*E-mail address: miura@cs.kitami-it.ac.jp