Strongly aberrated wavefronts lead to inaccuracies and nonlinearities in holography-based modal wavefront sensing (HMWS). In this contribution, a low-resolution Shack–Hartmann sensor (LRSHS) is incorporated into HMWS via a compact holographic design to extend the dynamic range of HMWS. A static binary-phase computer-generated hologram is employed to generate the desired patterns for Shack–Hartmann sensing and HMWS. The low-order aberration modes dominating the wavefront error are first sensed with the LRSHS and corrected by the wavefront modulator. The system then switches to HMWS to obtain better sensor sensitivity and accuracy. Simulated as well as experimental results are shown for validating the proposed method.
© 2012 Optical Society of America
Atmospheric and Oceanic Optics
Original Manuscript: June 6, 2012
Revised Manuscript: July 10, 2012
Manuscript Accepted: August 7, 2012
Published: August 31, 2012
Shihao Dong, Tobias Haist, and Wolfgang Osten, "Hybrid wavefront sensor for the fast detection of wavefront disturbances," Appl. Opt. 51, 6268-6274 (2012)