AO4ELT5 Proceedings

Reducing the Field of View in Correlating Wavefront Sensors for Solar Adaptive Optics

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.

DOI: 10.26698/AO4ELT5.0156- Proceeding PDF

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