Testing and alignment of the LBTI

Jihun Kim*, Philip Hinz, Olivier Durney, Tom Connors, Manny Montoya, Christian Schwab

*Corresponding author for this work

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

3 Citations (Scopus)


The Large Binocular Telescope Interferometer (LBTI) has been developed and tested and is almost ready to be installed to LBT mount. In preparation for installation, testing of the beam combination and phasing of the system have been developed. The testing is currently in progress. The development of a telescope simulator for LBTI has allowed verification of phasing and alignment with a broad band source at 10 microns2. Vibration tests with the LBTI mounted to the LBT were carried out in July 2008, with both seismic accelerometers and an internal optical interferometric measurement. The results have allowed identification of potential vibration sources on the telescope. Plans for a Star Simulator that illuminates each LBT aperture at the prime focus with two artificial point sources derived from a single point source via fiber optics are presented. The Star Simulator will allow testing of LBTI with the telescope and the adaptive secondaries in particular. Testing with the Star Simulator will allow system level testing of LBTI on the telescope, without need to use on-sky time. Testing of the Star Simulator components are presented to verify readiness for use with the LBTI.

Original languageEnglish
Title of host publicationOptical and Infrared Interferometry II
EditorsWilliam C. Danchi, Françoise Delplancke, Jayadev K. Rajagopal
Place of PublicationWashington, DC
Number of pages12
ISBN (Print)9780819482242
Publication statusPublished - 2010
Externally publishedYes
EventOptical and Infrared Interferometry II - San Diego, CA, United States
Duration: 27 Jun 20102 Jul 2010


OtherOptical and Infrared Interferometry II
CountryUnited States
CitySan Diego, CA



  • Alignment
  • Large binocular telescope
  • Star simulator
  • Vibration test

Cite this

Kim, J., Hinz, P., Durney, O., Connors, T., Montoya, M., & Schwab, C. (2010). Testing and alignment of the LBTI. In W. C. Danchi, F. Delplancke, & J. K. Rajagopal (Eds.), Optical and Infrared Interferometry II (Vol. 7734, pp. 1-12). [77341W] Washington, DC: SPIE. https://doi.org/10.1117/12.857342