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Optical System Design

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

[+] Author Affiliations
S. Vivès

Laboratoire d’Astrophysique de Marseille, Site des Olives BP8-13376, Marseille, France

E. Prieto

Laboratoire d’Astrophysique de Marseille, Site des Olives BP8-13376, Marseille, France

Opt. Eng. 45(9), 093001 (September 21, 2006). doi:10.1117/1.2355515
History: Received November 25, 2005; Revised February 07, 2006; Accepted February 09, 2006; Published September 21, 2006
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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).

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© 2006 Society of Photo-Optical Instrumentation Engineers

Citation

S. Vivès and E. Prieto
"Original image slicer designed for integral field spectroscopy with the near-infrared spectrograph for the James Webb Space Telescope", Opt. Eng. 45(9), 093001 (September 21, 2006). ; http://dx.doi.org/10.1117/1.2355515


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