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Proceedings Paper

Optimizing the transmission of the GRAVITY/VLTI near-infrared wavefront sensor
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Paper Abstract

The GRAVITY instrument’s adaptive optics system consists of a novel cryogenic near-infrared wavefront sensor to be installed at each of the four unit telescopes of the VLT. Feeding the GRAVITY wavefront sensor with light in the 1.4 - 2.4 micrometer band, while suppressing laser light originating from the GRAVITY metrology system, custom-built optical components are required. Here we report on optical and near-infrared testing of the silicon entrance windows of the wavefront sensor cryostat and other reflective optics used in the warm feeding optics.

Paper Details

Date Published: 12 September 2012
PDF: 7 pages
Proc. SPIE 8445, Optical and Infrared Interferometry III, 844531 (12 September 2012); doi: 10.1117/12.925920
Show Author Affiliations
Pengqian Yang, Max-Planck-Institut für Astronomie (Germany)
Shanghai Institute of Optics and Fine Mechanics (China)
Stefan Hippler, Max-Planck-Institut für Astronomie (Germany)
Casey P. Deen, Max-Planck-Institut für Astronomie (Germany)
Armin Böhm, Max-Planck-Institut für Astronomie (Germany)
Wolfgang Brandner, Max-Planck-Institut für Astronomie (Germany)
Thomas Henning, Max-Planck-Institut für Astronomie (Germany)
Armin Huber, Max-Planck-Institut für Astronomie (Germany)
Sarah Kendrew, Max-Planck-Institut für Astronomie (Germany)
Rainer Lenzen, Max-Planck-Institut für Astronomie (Germany)
Ralf-Rainer Rohloff, Max-Planck-Institut für Astronomie (Germany)
Constanza Araujo-Hauck, Univ. zu Köln (Germany)
Oliver Pfuhl, Max-Planck-Institut für extraterrestrische Physik (Germany)
Yann Clénet, LESIA - Observatoire de Paris, CNRS, Univ. Pierre et Marie Curie, Univ. Paris-Diderot (France)
Jianqiang Zhu, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 8445:
Optical and Infrared Interferometry III
Françoise Delplancke; Jayadev K. Rajagopal; Fabien Malbet, Editor(s)

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