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30 September 2004 The LINC-NIRVANA cryogenic interferometric camera
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Abstract
The LINC-NIRVANA instrument is a 1-2.5 micron Fizeau interferometric imager, which combines the light of the two 8.4 m mirrors of the Large Binocular Telescope on Mt. Graham in Arizona. The cryogenic camera forms the heart of the science channel of this instrument, delivering a 1 arcmin diameter field of view with 5 mas spatial resolution. The center 10x10 arcseconds, initially limited by the size of the 2048x2048 Hawaii-2 detector, are used for science observations. For simplicity, the camera has a fixed, F/32 optical path of the combined beams, leading to wavelength-dependent sampling. We describe the main components of the camera, as well as present the calculations of interferometric performance and the required opto-mechanical tolerances. We demonstrate that specially designed components can reach these specifications.
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Peter Bizenberger, Dave Andersen, Harald Baumeister, Udo Beckmann, Emiliano Diolaiti, Tom M. Herbst, Werner Laun, Lars Mohr, Vianak Naranjo, and Christian Straubmeier "The LINC-NIRVANA cryogenic interferometric camera", Proc. SPIE 5492, Ground-based Instrumentation for Astronomy, (30 September 2004); doi: 10.1117/12.551400; https://doi.org/10.1117/12.551400
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