A dynamically aligned step scanning mechanism for an imaging Fourier transform spectrometer for astronomy

Jean-Thomas Landry; Frédéric Grandmont

doi:10.1117/12.673481

6 July 2006 A dynamically aligned step scanning mechanism for an imaging Fourier transform spectrometer for astronomy

Proceedings Volume 6273, Optomechanical Technologies for Astronomy; 62731N (2006) https://doi.org/10.1117/12.673481
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

This paper presents an overview of a step scanning mechanism employing a flexure stage coupled with a dynamically aligned mirror used in the SpIOMM (Spectrometre Imageur de l'Observatoire du Mont Megantic) instrument, an Imaging Fourier Transform Spectrometer (IFTS) concept for ground based telescopes produced in collaboration with ABB and Universite Laval. This instrument can acquire spectra of variable resolutions up to R = λ/Δλ = 10 000 from the near UV to the near IR (350 nm to 900 nm). It is designed to fit the f/8 focus of the Mont Megantic (Quebec, Canada) 1.6m optical telescope. The innovative aspect of this instrument compared to other imaging spectrometers is the spatial coverage. The FOV covers spans of 12 arc minutes in diameter with a pixel sampling of 0.55 arc seconds. Hence spectra of more than a million scene elements are acquired at each measurement.

Citation Download Citation

Jean-Thomas Landry and Frédéric Grandmont "A dynamically aligned step scanning mechanism for an imaging Fourier transform spectrometer for astronomy", Proc. SPIE 6273, Optomechanical Technologies for Astronomy, 62731N (6 July 2006); https://doi.org/10.1117/12.673481

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