12 April 2017 Optics alignment of a balloon-borne far-infrared interferometer BETTII
Author Affiliations +
Abstract
The Balloon Experimental Twin Telescope for Infrared Interferometry (BETTII) is an 8-m baseline far-infrared (FIR: 30 90    μ m ) interferometer providing spatially resolved spectroscopy. The initial scientific focus of BETTII is on clustered star formation, but this capability likely has a much broader scientific application. One critical step in developing an interferometer, such as BETTII, is the optical alignment of the system. We discuss how we determine alignment sensitivities of different optical elements on the interferogram outputs. Accordingly, an alignment plan is executed that makes use of a laser tracker and theodolites for precise optical metrology of both the large external optics and the small optics inside the cryostat. We test our alignment on the ground by pointing BETTII to bright near-infrared sources and obtaining their images in the tracking detectors.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Arnab Dhabal, Arnab Dhabal, Stephen A. Rinehart, Stephen A. Rinehart, Maxime Rizzo, Maxime Rizzo, Lee G. Mundy, Lee G. Mundy, Henry P. Sampler, Henry P. Sampler, Roser Juanola-Parramon, Roser Juanola-Parramon, Todd J. Veach, Todd J. Veach, Dale J. Fixsen, Dale J. Fixsen, Jordi Vila Hernandez de Lorenzo, Jordi Vila Hernandez de Lorenzo, Robert F. F. Silverberg, Robert F. F. Silverberg, } "Optics alignment of a balloon-borne far-infrared interferometer BETTII," Journal of Astronomical Telescopes, Instruments, and Systems 3(2), 024002 (12 April 2017). https://doi.org/10.1117/1.JATIS.3.2.024002 . Submission: Received: 20 January 2017; Accepted: 27 March 2017
Received: 20 January 2017; Accepted: 27 March 2017; Published: 12 April 2017
JOURNAL ARTICLE
15 PAGES


SHARE
RELATED CONTENT

JouFLU upgrades to the fiber linked unit for optical...
Proceedings of SPIE (July 23 2014)
Intensity interferometry with Aqueye+ and Iqueye in Asiago
Proceedings of SPIE (August 07 2016)
VINCI: the VLT Interferometer commissioning instrument
Proceedings of SPIE (July 04 2000)
LINC NIRVANA for the LBT setting up the world's...
Proceedings of SPIE (October 23 2012)
Realization of the MIDI cold optics
Proceedings of SPIE (February 20 2003)

Back to Top