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Optical Engineering

Original image slicer designed for integral field spectroscopy with the near-infrared spectrograph for the James Webb Space Telescope
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Paper Abstract

Integral field spectroscopy (IFS) provides a spectrum simultaneously for each spatial sample of an extended 2-D field. It consists of an integral field unit (IFU), which slices and rearranges the initial field along the entrance slit of a spectrograph. We present an original design of IFU based on the advanced image slicer concept. To reduce optical aberrations, pupil and slit mirrors are disposed in a fan-shaped configuration, which means that angles between incident and reflected beams on each element are minimized. The fan-shaped image slicer improves image quality in terms of wavefront error by a factor of 2 compared with a classical image slicer, and furthermore, it guaranties a negligible level of differential aberration in the field. As an example, we present the design LAM used for its proposal at the near-infrared spectrograph (NIRSpec/IFU) invitation of tender for the James Webb Space Telescope (JWST).

Paper Details

Date Published: 1 September 2006
PDF: 6 pages
Opt. Eng. 45(9) 093001 doi: 10.1117/1.2355515
Published in: Optical Engineering Volume 45, Issue 9
Show Author Affiliations
Sebastien Vives, Lab. d'Astrophysique de Marseille (France)
Eric Prieto, Lab. d'Astrophysique de Marseille (France)


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