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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

18 Scopus citations

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.

Original languageEnglish (US)
Title of host publicationModeling, Systems Engineering, and Project Management for Astronomy IV
DOIs
StatePublished - Nov 8 2010
Externally publishedYes
EventModeling, Systems Engineering, and Project Management for Astronomy IV - San Diego, CA, United States
Duration: Jun 27 2010Jul 1 2010

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7738
ISSN (Print)0277-786X

Conference

ConferenceModeling, Systems Engineering, and Project Management for Astronomy IV
CountryUnited States
CitySan Diego, CA
Period6/27/107/1/10

Keywords

  • HETDEX
  • Hobby-Eberly Telescope
  • Shack-Hartmann wavefront sensor
  • Wavefront sensing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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