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7 April 2017 James Webb Space Telescope microshutter arrays and beyond
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Microshutter array (MSA) subsystems were developed at NASA Goddard Space Flight Center as multiobject selectors for the Near-Infrared Spectrograph (NIRSpec) instrument on the James Webb Space Telescope (JWST). The subsystem will enable NIRSpec to simultaneously obtain spectra from >100 targets, which, in turn, increases instrument efficiency 100-fold. This system represents one of the three major innovations on the JWST that is scheduled to be launched in 2018 as the successor to the Hubble Space Telescope. Featuring torsion hinges, light shields, magnetic actuation, and electrostatic latching and addressing, microshutters are designed for the selective transmission of light with high efficiency and contrast. Complete MSA assemblies consisting of 365×171 microshutters were successfully fabricated and tested, and passed a series of critical reviews for programmable 2-D addressing, life tests, and optical contrast tests. At the final stage of the JWST MSA fabrication, we began to develop the next generation microshutter arrays (NGMSA) for future telescopes. These telescopes will require a much larger field of view than JWSTs. We discussed strategies for fabrication of a proof-of-concept NGMSA that will be modular in design and electrostatically actuated. The details of NGMSA development will be discussed in a follow-up paper.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE) 1932-5150/2017/$25.00 © 2017 SPIE
Mary J. Li, Ari-David Brown, Devin E. Burns, Daniel P. Kelly, Kyowon Kim, Alexander S. Kutyrev, Samuel H. Moseley, Vilem Mikula, and Lance H. Oh "James Webb Space Telescope microshutter arrays and beyond," Journal of Micro/Nanolithography, MEMS, and MOEMS 16(2), 025501 (7 April 2017).
Received: 30 August 2016; Accepted: 6 March 2017; Published: 7 April 2017


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