EAS Publications Series
Volume 12, 2004Astronomy with High Contrast Imaging II
|Page(s)||185 - 194|
|Published online||11 October 2004|
C. Aime and R. Soummer (eds)
EAS Publications Series, 12 (2004) 185-194
Cryogenic IR test of the 4QPM coronagraph
LESIA Observatoire de Meudon, France
2 Institut d'Astrophysique et de Géologie de Liège, Belgium
We report on the facility we developed at the Observatoire de Meudon to test the Four Quadrant Phase Mask (4QPM) coronagraph in the Infrared (IR) and at low temperature. This facility has been developed in the context of the mid-IR instrument MIRI for the James Webb Space Telescope. Three 4QPM will take place inside MIRI and need to be qualified for space environment. The performance of the coronagraph is in agreement with our expectations from numerical simulations. The peak intensity of the diffraction pattern is reduced by a factor 380, a performance being limited by the chromatic effects and the size of the bench source.
© EAS, EDP Sciences, 2004
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