Analysis of active alignment control of the Hobby-Eberly Telescope wide-field corrector using Shack-Hartmann wavefront sensors

Hanshin Lee; Michael Hart; Gary J. Hill; M. D. Rafal

doi:10.1117/12.857121

4 August 2010 Analysis of active alignment control of the Hobby-Eberly Telescope wide-field corrector using Shack-Hartmann wavefront sensors

Hanshin Lee, Michael Hart, Gary J. Hill, M. D. Rafal

Author Affiliations +

Proceedings Volume 7738, Modeling, Systems Engineering, and Project Management for Astronomy IV; 77380I (2010) https://doi.org/10.1117/12.857121
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

One of the key aspects of the Wide-Field Upgrade (WFU) for the 10m Hobby-Eberly Telescope (HET) is the use of wavefront sensing (WFS) to close the loop of active alignment control of the new four-mirror Wide-Field Corrector (WFC), as it tracks sidereal motion, with respect to the fixed spherical segmented primary mirror. This makes the telescope pupil dynamically change in shape. This is a unique challenge to the WFS on the HET, in addition to various influences of seeing, primary mirror segment errors, and dynamic deflection of the internal optical components of the WFC. We conducted extensive simulations to understand the robustness of the WFS in the face of these errors and the results of these analyses are discussed in this paper.

Citation Download Citation

Hanshin Lee, Michael Hart, Gary J. Hill, and M. D. Rafal "Analysis of active alignment control of the Hobby-Eberly Telescope wide-field corrector using Shack-Hartmann wavefront sensors", Proc. SPIE 7738, Modeling, Systems Engineering, and Project Management for Astronomy IV, 77380I (4 August 2010); https://doi.org/10.1117/12.857121

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