Mounting MIRI's double prism

S. Fischer; C. Straubmeier; A. Eckart; L. Rossi; E. Mazy

doi:10.1117/12.670201

15 June 2006 Mounting MIRI's double prism

S. Fischer, C. Straubmeier, A. Eckart, L. Rossi, E. Mazy

Proceedings Volume 6265, Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter; 62653A (2006) https://doi.org/10.1117/12.670201
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

MIRI, the Mid-InfraRed Instrument, is one of the 4 instruments currently under development for the NASA/ESA James Webb Space Telescope. Together with the US, MIRI is built by a consortium of 28 European institutes under the lead-management of ESA. The instrument consists of two main modules, a spectroscopic and an imaging part. The imager will allow imaging, coronography and low resolution spectroscopy. The latter mode will use a ZnS-Ge-double-prism assembly as dispersive element. In this contribution, we present the design concept for the mounting of this double prism assembly which places the prisms into the optical path of the imager via an interface to the imager's filterwheel. Despite the very limited available space in the filterwheel and the high weight of the prisms (in comparison to the other filters in the filterwheel), the kinematic mounting of the individual prisms guarantees exact placement with smallest possible induced forces into the prisms. The here presented design of the development model of the double prism assembly is based upon GEM calculation. Experimental thermal and vibrational tests will be performed by the time of this conference.

Citation Download Citation

S. Fischer, C. Straubmeier, A. Eckart, L. Rossi, and E. Mazy "Mounting MIRI's double prism", Proc. SPIE 6265, Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter, 62653A (15 June 2006); https://doi.org/10.1117/12.670201

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