Stray light modeling of the James Webb Space Telescope (JWST) Integrated Science Instrument Module (ISIM)

Scott O. Rohrbach; Ryan G. Irvin; Lenward T. Seals; Dennis L. Skelton

doi:10.1117/12.2238827

28 September 2016 Stray light modeling of the James Webb Space Telescope (JWST) Integrated Science Instrument Module (ISIM)

Scott O. Rohrbach, Ryan G. Irvin, Lenward T. Seals, Dennis L. Skelton

Author Affiliations +

Proceedings Volume 9947, Current Developments in Lens Design and Optical Engineering XVII; 99470K (2016) https://doi.org/10.1117/12.2238827
Event: SPIE Optical Engineering + Applications, 2016, San Diego, California, United States

Abstract

This paper describes an integrated stray light model of each Science Instrument (SI) in the Integrated Science Instrument Module (ISIM) of the James Webb Space Telescope (JWST) and the Optical Telescope Element Simulator (OSIM), the light source used to characterize the performance of ISIM in cryogenic-vacuum tests at the Goddard Space Flight Center (GSFC). We present three cases where this stray light model was integral to solving questions that arose during the testing campaign – 1) ghosting and coherent diffraction from hardware surfaces in the Near Infrared Imager and Slitless Spectrograph (NIRISS) GR700XD grism mode, 2) ghost spots in the Near Infrared Camera (NIRCam) GRISM modes, and 3) scattering from knife edges of the NIRCam focal plane array masks.

Conference Presentation

Citation Download Citation

Scott O. Rohrbach, Ryan G. Irvin, Lenward T. Seals, and Dennis L. Skelton "Stray light modeling of the James Webb Space Telescope (JWST) Integrated Science Instrument Module (ISIM)", Proc. SPIE 9947, Current Developments in Lens Design and Optical Engineering XVII, 99470K (28 September 2016); https://doi.org/10.1117/12.2238827

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