NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Prototype Imaging Spectrograph for Coronagraphic Exoplanet Studies (PISCES) for WFIRST-AFTAPrototype 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.
Document ID
20160013313
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Gong, Qian (NASA Goddard Space Flight Center Greenbelt, MD United States)
Mcelwain, Michael (NASA Goddard Space Flight Center Greenbelt, MD United States)
Greeley, Bradford (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Grammer, Bryan (Design Interface, Inc. Finksburg, MD, United States)
Marx, Catherine (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Memarsadeghi, Nargess (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Stapelfeldt, Karl (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Hilton, George (Newton, LLC Bowie, MD, United States)
Sayson, Jorge Llop (Catholic Univ. of America Washington, DC, United States)
Perrin, Marshall (Space Telescope Science Inst. Baltimore, MD, United States)
Demers, Richard (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Tang, Hong (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Kern, Brian (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Ferdosi, Janan (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
November 8, 2016
Publication Date
August 9, 2015
Publication Information
Publication: Techniques and Instrumentation for Detection of Exoplanets VII
Volume: 9605
Subject Category
Optics
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN32944
Meeting Information
SPIE Optics and Photonics(San Diego, CA)
Funding Number(s)
CONTRACT_GRANT: NNG15CR64C
Distribution Limits
Public
Copyright
Other
Keywords
Wide-Field InfraRed Survey Telescope Astrophysics Focused Telescope Assets (WFIR
Prototype Imaging Spectrograph for Coronagraphic Exoplanet Studies (PISCES)
Hybrid Lyot Coronagraph(HLC)