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Proceedings Paper

Opto-thermo-mechanical numerical simulations of three different concepts of infrared achromatic phase shifters
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Paper Abstract

The Darwin/TPF mission aims at detecting directly extra solar planets. It is based on the nulling interferometry, concept proposed by Bracewell in 1978, and developed since 1995 in several European and American laboratories. One of the key optical devices for this technique is the achromatic phase shifter (APS). This optical component is designed to produce a π phase shift over the whole Darwin spectral range (i.e. 6-18 μm), and will be experimentally tested on the NULLTIMATE consortium nulling test bench (Labèque et al). Three different concepts of APS are being simulated: dispersive plates focus crossing and field reversal. In this paper, we show how thermal, mechanical and optical models are merged into a single robust model, allowing a global numerical simulation of the optical component performances. We show how these simulations help us to optimizing the design and present results of the numerical model.

Paper Details

Date Published: 20 October 2004
PDF: 9 pages
Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); doi: 10.1117/12.551587
Show Author Affiliations
Bruno Chazelas, Institut d'Astrophysique Spatiale, CNRS and Univ. Paris-Sud (France)
Claude Valette, Institut d'Astrophysique Spatiale, CNRS and Univ. Paris-Sud (France)
Thierry Lepine, Institut d'Optique (France)
Marc Barillot, Alcatel Space (France)
Frank Brachet, Institut d'Astrophysique Spatiale, CNRS and Univ. Paris-Sud (France)
Sebatien Dervaux, Observatoire de la Cote d'Azur (France)
Francois Fressin, Observatoire de la Cote d'Azur (France)
Jean Gay, Observatoire de la Cote d'Azur (France)
Gregory Gadret, Univ. de Bourgogne (France)
Alain Labeque, Institut d'Astrophysique Spatiale, CNRS and Univ. Paris-Sud (France)
Alain Leger, Institut d'Astrophysique Spatiale, CNRS and Univ. Paris-Sud (France)
Ralph Launhardt, Max-Planck-Institut fur Astronomie (Germany)
Jacques Mangin, Univ. de Bourgogne (France)
Dimitri Mawet, Univ. de Liege (Belgium)
Marc Ollivier, Institut d'Astrophysique Spatiale, CNRS and Univ. Paris-Sud (France)
Yves Rabbia, Observatoire de la Cote d'Azur (United States)
Elke Schmidt, Kayser-Threde GmbH (France)


Published in SPIE Proceedings Vol. 5491:
New Frontiers in Stellar Interferometry
Wesley A. Traub, Editor(s)

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