A laser-truss based optical alignment system on LBT

Andrew Rakich, Heejoo Choi, Christian Veillet, John M. Hill, Matthieu Bec, Yang Zhang, Trenton Brendel, Breann Sitarski, Michael Gardiner, Dae Wook Kim, Stephanie Rodriguez

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

7 Scopus citations


Since 2017 LBTO, in partnership with GMTO, has been developing a laser-trussed based metrology system for the active alignment of telescope main optical components to each other and to instruments. The effort has addressed needs of both organizations; LBTO with the opportunity to assess the performance of a new technological approach to telescope alignment, and the GMTO with the opportunity to prototype and field-test a system that has been identified as a crucial "missing link"in the active-optics chain between open-loop modelling and wavefront-sensing for ELT-scale telescopes. Following two years of effort the positive results so far obtained have convinced LBTO, in 2019, to commence to develop an integrated operational active-optics system based on this technological approach. A team drawn from LBTO, Steward Observatory, GMTO, the Wyant College of Optical Sciences and Mersenne Optical Consulting are currently completing the first phase of this Telescope Metrology System (TMS). This paper shall describe the system in detail and report on progress, current status, and future goals.

Original languageEnglish (US)
Title of host publicationGround-Based and Airborne Telescopes VIII
EditorsHeather K. Marshall, Jason Spyromilio, Tomonori Usuda
ISBN (Electronic)9781510636774
StatePublished - 2020
EventGround-Based and Airborne Telescopes VIII 2020 - Virtual, Online, United States
Duration: Dec 14 2020Dec 22 2020

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceGround-Based and Airborne Telescopes VIII 2020
Country/TerritoryUnited States
CityVirtual, Online


  • Active optics
  • Interferometer
  • Metrology
  • Telescope alignment

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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