Townson, Matthew J. (Dept. Physics, Durham University), Saunter, Christopher D. (Dept. Physics, Durham University)
Wavefront sensing for solar adaptive optics currently requires the use of extended-field Shack-Hartmann wavefront sensors. Such wavefront sensors suffer from a reduced sensitivity to high altitude turbulence due effects of measuring wavefront gradients using the relative motion within the extended-field. We discuss the performance of centroiding techniques in a correlation Shack-Hartmann wavefront sensor and the insensitivity to high altitude turbulence and propose a method for reducing the field of view required to effectively measure the wavefront gradient in order to increase the sensors sensitivity to high altitude turbulence.
10.26698/AO4ELT5.0156- Proceeding PDF