EAS Publications Series
Volume 12, 2004Astronomy with High Contrast Imaging II
|Page(s)||235 - 244|
|Published online||11 October 2004|
C. Aime and R. Soummer (eds)
EAS Publications Series, 12 (2004) 235-244
Experimental aspects of DARWIN
Université de Paris-Sud - Orsay
As simple it appears to be on the paper, nulling interferometry is a difficult technique when experimentally implemented to reach high rejection factors. In that case, each defect of the system is a possibility to bring back on the detector, the photons we want to eliminate. The loss in terms of S/N ratio is quickly important. In this paper, I develop present state of the art in nulling interferometry field and experimental realisations. I describe their performance and limitations, and present technological developments all arounf the world. Particularly, I emphasize present development regarding to optical functions in the infrared spectral range (delay lines, achromatic phase shifters, beam combiners...).
© EAS, EDP Sciences, 2004
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