Fast closed-loop adaptive optics system for imaging through strong turbulence layer

We present an adaptive optics approach to improve the image quality of telescopes observing targets through atmospheric turbulences. Intended as an enhancement for off-the-shelf imaging systems an f/10 achromatic lens telescope is expanded by relay telescopes and dichroitic beam splitters to satisfy the adaptive optics requirements. A high speed Shack-Hartmann wavefront sensor and an adaptive membrane mirror are located in conjugated planes. A non-deterministic PC system provides a fast closed-loop frequency of 500 Hz. The system characteristics are investigated and first results in terms of wavefront diagrams and resolution charts are presented