Holographic combination of low-resolution Shack-Hartmann sensor and holography-based modal Zernike wavefront sensor

摘要

The linearity and accuracy of holography-based modal wavefront sensing (HMWS) is reduced when large aberrationsare present in the incoming wavefront. In this contribution, a combination of HMWS and a low-resolution Shack-Hartmann sensor (LRSHS) is introduced to extend the dynamic range of HMWS via a compact holographic design. Thetypically dominating low-order modes in the incoming wavefront are first corrected by the LRSHS. The system thenswitches to HMWS after one or two corrections to obtain better sensor sensitivity and accuracy. First experimentalresults are shown for validating the method.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.