Publications of the MPIfR
Optical & Infrared
Interferometry Group
Bizenberger, Peter; Andersen, Dave;
Baumeister, Harald; Beckmann, Udo; Diolaiti, Emiliano; Herbst, Tom M.;
Laun, Werner; Mohr, Lars; Naranjo, Vianak; Straubmeier, Christian
The LINC-NIRVANA cryogenic interferometric
camera
Ground-based Instrumentation for Astronomy,
Proceedings of SPIE Volume 5492.
Edited by Alan F. M. Moorwood, Masanori Iye: The International Society
for Optical Engineering, 2004., p.1461-1470
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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