Seung-Kyu Park, Korea Atomic Energy Research Institute, Sung-Hoon Baik, Korea Atomic Energy Research Institute, Jong Kyu Jung, Doosan DST, Soo Man Lee, Doosan DST, Jaeeun Yoo, Agency for Defense Development, Young Soo Choi, Agency for Defense Development
Keywords: Adaptive optics, Wave-front sensor, Deformable mirror, Balance of eigenvalues, Difference wave-front pattern
Abstract:
A small scale laboratory adaptive optics system using a Shack-Hartmann wave-front sensor (WFS) and a membrane deformable mirror (DM) has been built for robust image acquisition. In this study, an adaptive limited control technique is adopted to maintain the long-term correction stability of an adaptive optics system. To prevent the waste of dynamic correction range for correcting small residual wave-front distortions which are inefficient to correct, the built system tries to limit wave-front correction when a similar small difference wave-front pattern is repeatedly generated. Also, the effect of mechanical distortion in an adaptive optics system is studied and a pre-recognition method for the distortion is devised to prevent low-performance system operation. A confirmation process for a balanced work assignment among deformable mirror (DM) actuators is adopted for the pre-recognition. The corrected experimental results obtained by using a built small scale adaptive optics system are described in this paper.
Date of Conference: September 15-18, 2015
Track: Poster