Physics – Optics
Scientific paper
Jun 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.554..735z&link_type=abstract
In: Proceedings of the 5th International Conference on Space Optics (ICSO 2004), 30 March - 2 April 2004, Toulouse, France. Ed.:
Physics
Optics
Space Optics
Scientific paper
The James Webb Space Telescope (JWST) will be equipped with a Multi-Object Spectrograph (MOS), in order to record simultaneously several hundred spectra. The selection of the objects in the field of view will be done by a programmable slit device based on a new technology, the Micro-Opto-Electro-Mechanical Systems (MOEMS). In Laboratoire d'Astrophysique de Marseille, we have developed since several years different tools for the modeling and the characterization of these MOEMS-based slit masks. Our models, based on Fourier theory, address key parameters for the spectrograph performance like the spectral photometric variation. We have also developed a characterization bench for the measurement of the contrast value, amount of the non-selected flux from sky background and bright sources. Effects of object position on the programmable slit device and contrast reduction when the exit pupil size is increasing have been revealed.
Dohlen Kjetil
Lanzoni Patrick
Zamkotsian Frederic
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