11 September 2015 Prototype imaging spectrograph for coronagraphic exoplanet studies (PISCES) for WFIRST/AFTA
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Abstract
Prototype Imaging Spectrograph for Coronagraphic Exoplanet Studies (PISCES) is a lenslet array based integral field spectrometer (IFS) designed for high contrast imaging of extrasolar planets. PISCES will be used to advance the technology readiness of the high contrast IFS baselined on the Wide-Field InfraRed Survey Telescope/Astrophysics Focused Telescope Assets (WFIRST-AFTA) coronagraph instrument. PISCES will be integrated into the high contrast imaging testbed (HCIT) at the Jet Propulsion Laboratory (JPL) and will work with both the Hybrid Lyot Coronagraph (HLC) and the Shaped Pupil Coronagraph (SPC) configurations. We discuss why the lenslet array based IFS was selected for PISCES. We present the PISCES optical design, including the similarities and differences of lenslet based IFSs to normal spectrometers, the trade-off between a refractive design and reflective design, as well as the specific function of our pinhole mask on the back surface of the lenslet array to reduce the diffraction from the edge of the lenslets. The optical analysis, alignment plan, and mechanical design of the instrument will be discussed.
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Qian Gong, Qian Gong, Michael McElwain, Michael McElwain, Bradford Greeley, Bradford Greeley, Bryan Grammer, Bryan Grammer, Catherine Marx, Catherine Marx, Nargess Memarsadeghi, Nargess Memarsadeghi, Karl Stapelfeldt, Karl Stapelfeldt, George Hilton, George Hilton, Jorge Llop Sayson, Jorge Llop Sayson, Marshall Perrin, Marshall Perrin, Richard Demers, Richard Demers, Hong Tang, Hong Tang, Brian Kern, Brian Kern, Janan Ferdosi, Janan Ferdosi, } "Prototype imaging spectrograph for coronagraphic exoplanet studies (PISCES) for WFIRST/AFTA", Proc. SPIE 9605, Techniques and Instrumentation for Detection of Exoplanets VII, 96050G (11 September 2015); doi: 10.1117/12.2187122; https://doi.org/10.1117/12.2187122
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