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Design of NEID, an Extreme Precision Doppler Spectrograph for WIYNWe have developed an optical design for a high resolution spectrograph in response to NASA's call for an extreme precision Doppler spectrometer (EPDS) for the WIYN telescope. Our instrument covers a wavelength range of 380 to 930 nm using a single detector and with a resolution of 100,000. To deliver the most stable spectrum, we avoid the use of an image slicer, in favor of a large (195 mm diameter) beam footprint on a 1x2 mosaic R4 Echelle grating. The optical design is based on a classic white pupil layout, with a single parabolic mirror that is used as the main and transfer collimator. Cross dispersion is provided by a single large PBM2Y glass prism. The refractive camera consists of only four rotationally symmetric lenses made from i-Line glasses, yet delivers very high image quality over the full spectral bandpass. We present the optical design of the main spectrograph bench and discuss the design trade-offs and expected performance.
Document ID
20180004146
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Schwab, C. (MacQuarie Univ. Sydney, Australia)
Rakich, A. (Giant Magellan Telescope Corp. (GMTO) Pasadena, CA, United States)
Gong, Q. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mahadevan, S. (Pennsylvania State Univ. University Park, PA, United States)
Halverson, S. P. (Pennsylvania State Univ. University Park, PA, United States)
Roy, A. (Pennsylvania State Univ. University Park, PA, United States)
Terrien, R. C. (Pennsylvania State Univ. University Park, PA, United States)
Robertson, P. M. (Pennsylvania State Univ. University Park, PA, United States)
Hearty, F. R. (Pennsylvania State Univ. University Park, PA, United States)
Levi, E. I. (Pennsylvania State Univ. University Park, PA, United States)
Monson, A. J. (Pennsylvania State Univ. University Park, PA, United States)
Wright, J. T. (Pennsylvania State Univ. University Park, PA, United States)
McElwain, M. W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bender, C. F. (Pennsylvania State Univ. University Park, PA, United States)
Blake, C. H. (Pennsylvania State Univ. University Park, PA, United States)
Stuermer, J. (Chicago Univ. Chicago, IL, United States)
Gurevich, Y. V. (Landessternwarte auf dem Koenigstuhl Heidelberg, Germany)
Chakraborty, A. (Physical Research Lab. Ahmedabad, India)
Ramsey, L. W. (Pennsylvania State Univ. University Park, PA, United States)
Date Acquired
August 2, 2018
Publication Date
June 26, 2016
Subject Category
Instrumentation And Photography
Report/Patent Number
GSFC-E-DAA-TN53101
Meeting Information
Meeting: SPIE Astronomical Telescopes + Instrumentation 2016
Location: Edinburgh, Scotland
Country: United Kingdom
Start Date: June 26, 2016
End Date: July 1, 2016
Sponsors: International Society for Optical Engineering
Distribution Limits
Public
Copyright
Use by or on behalf of the US Gov. Permitted.
Keywords
Optics

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