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Proceedings Paper

Pupil alignment reference (PAR) for the Mid-Infrared Instrument (MIRI) for optical alignment and verification on the Integrated Science Instrument Module (ISIM) in James Webb Space Telescope (JWST)
Author(s): Cagatay Aymergen; Phillip Driggers; Raymond Ohl IV; Ray Lundquist; Pam Davila; Brent Bos; Scott Antonille; David Kubalak; Suong Le; Leonard Hanssen; Vilem Mikula; Claef Hakun; Corina Guishard; Jeffrey Guzek; Joe Connelly; Joseph McMann
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Paper Abstract

The Mid Infrared Instrument (MIRI), one of the four instruments on the Integrated Science Instrument Module (ISIM) of the James Webb Space Telescope (JWST), supports all of the science objectives of the observatory. MIRI optical alignment is an important step in the verification process, directly affecting mission success. The MIRI optical alignment is verified on the ground at the integrated ISIM level using an element in the MIRI Filter Wheel, the pupil alignment reference (PAR), developed by NASA GSFC and provided to MIRI. It is a ~2.3g aluminum piece that has a flat, specularly reflective, 3mm diameter surface in its center, with laser-etched fiducials within its aperture. The PAR is illuminated via an optical stimulus (ground support equipment) and imaged using a pupil imaging camera, during the ISIM test program in order to determine absolute and relative changes in the alignment that impact pupil shear and roll. Here we describe the MIRI PAR; its physical properties and challenges during its design, manufacturing, and testing.

Paper Details

Date Published: 28 August 2009
PDF: 10 pages
Proc. SPIE 7433, Optical System Alignment, Tolerancing, and Verification III, 74330P (28 August 2009); doi: 10.1117/12.826286
Show Author Affiliations
Cagatay Aymergen, SGT, Inc. (United States)
Phillip Driggers, SGT, Inc. (United States)
Raymond Ohl IV, NASA Goddard Space Flight Ctr. (United States)
Ray Lundquist, NASA Goddard Space Flight Ctr. (United States)
Pam Davila, NASA Goddard Space Flight Ctr. (United States)
Brent Bos, NASA Goddard Space Flight Ctr. (United States)
Scott Antonille, NASA Goddard Space Flight Ctr. (United States)
David Kubalak, NASA Goddard Space Flight Ctr. (United States)
Suong Le, Ball Aerospace & Technologies Corp. (United States)
Leonard Hanssen, NIST (United States)
Vilem Mikula, NASA Goddard Space Flight Ctr. (United States)
Claef Hakun, NASA Goddard Space Flight Ctr. (United States)
Corina Guishard, NASA Goddard Space Flight Ctr. (United States)
Jeffrey Guzek, NASA Goddard Space Flight Ctr. (United States)
Joe Connelly, NASA Goddard Space Flight Ctr. (United States)
Joseph McMann, Qinetiq North America (United States)


Published in SPIE Proceedings Vol. 7433:
Optical System Alignment, Tolerancing, and Verification III
José Sasián; Richard N. Youngworth, Editor(s)

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