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12 September 2012 Optimizing the transmission of the GRAVITY/VLTI near-infrared wavefront sensor
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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.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Pengqian Yang, Stefan Hippler, Casey P. Deen, Armin Böhm, Wolfgang Brandner, Thomas Henning, Armin Huber, Sarah Kendrew, Rainer Lenzen, Ralf-Rainer Rohloff, Constanza Araujo-Hauck, Oliver Pfuhl, Yann Clénet, and Jianqiang Zhu "Optimizing the transmission of the GRAVITY/VLTI near-infrared wavefront sensor", Proc. SPIE 8445, Optical and Infrared Interferometry III, 844531 (12 September 2012); https://doi.org/10.1117/12.925920
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