From colors to chemistry: a combined lenslet/slicer IFS for medium-resolution spectroscopy

R. Deno Stelter; Andrew Skemer; Cyril Bourgenot

doi:10.1117/12.2594802

1 September 2021 From colors to chemistry: a combined lenslet/slicer IFS for medium-resolution spectroscopy

R. Deno Stelter, Andrew Skemer, Cyril Bourgenot

Proceedings Volume 11823, Techniques and Instrumentation for Detection of Exoplanets X; 118230E (2021) https://doi.org/10.1117/12.2594802
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

We present the design and lab performance of a prototype lenslet-slicer hybrid integral field spectrograph (IFS), validating the concept for use in future instruments like SCALES/PSI-Red. By imaging extrasolar planets with IFS, it is possible to measure their chemical compositions, temperatures and masses. Many exoplanet-focused instruments use a lenslet IFS to make datacubes with spatial and spectral information used to extract spectral information of imaged exoplanets. Lenslet IFS architecture results in very short spectra and thus low spectral resolution. Slicer IFSs can obtain higher spectral resolution but at the cost of increased optical aberrations that propagate through the down-stream spectrograph and degrade the spatial information we can extract. We have designed a lenslet/slicer hybrid that combines the minimal aberrations of the lenslet IFS with the high spectral resolution of the slicer IFS. The slicer output f/# matches the lenslet f/# requiring only additional gratings.

Conference Presentation

Citation Download Citation

R. Deno Stelter, Andrew Skemer, and Cyril Bourgenot "From colors to chemistry: a combined lenslet/slicer IFS for medium-resolution spectroscopy", Proc. SPIE 11823, Techniques and Instrumentation for Detection of Exoplanets X, 118230E (1 September 2021); https://doi.org/10.1117/12.2594802

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