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

Townson, Matthew J.; Saunter, Christopher D.

Abstract

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.

Citation

Townson, M. J., & Saunter, C. D. (2017, June). Reducing the Field of View in Correlating Wavefront Sensors for Solar Adaptive Optics. Presented at Adaptive Optics for Extremely Large Telescopes 5 (AO4ELT5), Tenerife, Canary Islands, Spain

• Presentation Conference Type: Conference Paper (published)
• Conference Name: Adaptive Optics for Extremely Large Telescopes 5 (AO4ELT5)
• Start Date: Jun 25, 2017
• End Date: Jun 30, 2017
• Publication Date: Jan 1, 2017
• Deposit Date: May 1, 2018
• Series Title: Adaptive Optics for Extremely Large Telescopes 5
• Book Title: Proceedings of the Adaptive Optics for Extremely Large Telescopes 5 (AO4ELT5) : Tenerife, Canary Islands, Spain, June 25-30, 2017.
• DOI: https://doi.org/10.26698/ao4elt5.0156
• Public URL: https://durham-repository.worktribe.com/output/1145505