Phase retrieval analysis of the Hobby-Eberly Telescope primary mirror segment figure error and its implication for wavefront sensing for the new wide-field upgrade

Hanshin Lee, Gary J. Hill, Michael Hart

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

7 Scopus citations

Abstract

Primary mirror segment figure error is potentially deleterious to the wavefront sensing in the new Hobby-Eberly Telescope (HET) Wide-Field Upgrade (WFU). Previous measurements indicated the presence of figure errors including prominent surface astigmatism on the segments, but need a systematic analysis to quantify the amounts. We developed a Phase Retrieval procedure that estimates the surface figure map by applying the iterative transform method to a set of focus-diversed images of a point source formed by the 91 segments of the 11m HET primary mirror. In this paper, we discuss this analysis and the implication of the analysis results for wavefront sensing on the upgraded HET.

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
  • Phase retrieval
  • Segment surface error

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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  • Cite this

    Lee, H., Hill, G. J., & Hart, M. (2010). Phase retrieval analysis of the Hobby-Eberly Telescope primary mirror segment figure error and its implication for wavefront sensing for the new wide-field upgrade. In Modeling, Systems Engineering, and Project Management for Astronomy IV [77381K] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7738). https://doi.org/10.1117/12.857129