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Spectral and radiometric calibration of WFIRST slitless spectrometer (grism) (Conference Presentation)

Paper Abstract

We have presented the optical design and early test result of WFIRST grism spectrometer in previous SPIE conferences. This paper reports the follow-on activity of the spectral and radiometric calibrations, including the calibration methods, experiment designs, and the light source and detector calibration. The real grism calibration includes the throughput versus wavelength, which is largely determined by the diffraction efficiency of the two diffractive surfaces. It also includes spectral resolution, point spread function, and encircle energy measurements. The measured data are presented. The comparisons between the test data and the simulation from theory, or optical model, are also presented.

Paper Details

Date Published: 9 September 2019
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Proc. SPIE 11115, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts IX, 1111503 (9 September 2019); doi: 10.1117/12.2530712
Show Author Affiliations
Qian Gong, NASA Goddard Space Flight Ctr. (United States)
Matthew Bergkoetter, NASA Goddard Space Flight Ctr. (United States)
Joshua Berrier, Tech Innovations, LLC (United States)
John Chambers, NASA Goddard Space Flight Ctr. (United States)
Margaret Dominguez, NASA Goddard Space Flight Ctr. (United States)
Wesley Fincher, Tech Innovations, LLC (United States)
John Hagopian, Lambda Consulting, LLC (United States)
Catherine Marx, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 11115:
UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts IX
Allison A. Barto; James B. Breckinridge; H. Philip Stahl, Editor(s)

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