MATISSE selection mechanism development

Jan Kragt; Niels Tromp; Gabby Kroes; Attila Jaskó

doi:10.1117/12.926602

13 September 2012 MATISSE selection mechanism development

Jan Kragt, Niels Tromp, Gabby Kroes, Attila Jaskó

Proceedings Volume 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II; 84504E (2012) https://doi.org/10.1117/12.926602
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

MATISSE (Multi AperTure mid-Infrared SpectroScopic Experiment) will be a mid-infrared spectro-interferometer combining the beams of up to four telescopes of the European Southern Observatory Very Large Telescope Interferometer (ESO VLTI), providing phase closure and image reconstruction. MATISSE will produce interferometric spectra in the LM and in the N band (3.0 to 13.0 micron) and is as such a successor of MIDI. Beams pass the warm preoptics and in the cold optics all beams recombine on the detector where they create a spectral interference pattern. Instruments with a large wavelength bandwidth like MATISSE usually comprise mechanisms for selection of observation mode, filters, dispersing elements, pinholes or slits. The cryogenic operating environment poses several challenges to these cryogenic mechanisms like differential thermal shrinkage, physical property change of materials and lubrication. For the MATISSE instrument two concepts of selection mechanisms can be distinguished: linear selection mechanisms (sliders) and rotating selection mechanisms (wheels). Both mechanisms provide high accuracy and repeatability. The feature density is high in a limited space envelope. Cryogenic electric motors are used as the actuator for all these mechanisms. This paper describes the design and realization of these linear and rotating selection mechanisms.

Citation Download Citation

Jan Kragt, Niels Tromp, Gabby Kroes, and Attila Jaskó "MATISSE selection mechanism development", Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 84504E (13 September 2012); https://doi.org/10.1117/12.926602

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