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Proceedings Paper

The deformable mirror demonstration mission (DeMi) CubeSat: optomechanical design validation and laboratory calibration
Author(s): Gregory Allan; Ewan S. Douglas; Derek Barnes; Mark Egan; Gabor Furesz; Warren Grunwald; Jennifer Gubner; Christian Haughwout; Bobby G. Holden; Paula do Vale Pereira; Abigail J. Stein; Kerri L. Cahoy
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Paper Abstract

Coronagraphs on future space telescopes will require precise wavefront correction to detect Earth-like exoplanets near their host stars. High-actuator count microelectromechanical system (MEMS) deformable mirrors provide wavefront control with low size, weight, and power. The Deformable Mirror Demonstration Mission (DeMi) payload will demonstrate a 140 actuator MEMS Deformable Mirror (DM) with 5:5 μm maximum stroke. We present the flight optomechanical design, lab tests of the flight wavefront sensor and wavefront reconstructor, and simulations of closed-loop control of wavefront aberrations. We also present the compact flight DM controller, capable of driving up to 192 actuator channels at 0-250V with 14-bit resolution. Two embedded Raspberry Pi 3 compute modules are used for task management and wavefront reconstruction. The spacecraft is a 6U CubeSat (30 cm x 20 cm x 10 cm) and launch is planned for 2019.

Paper Details

Date Published: 21 August 2018
PDF: 16 pages
Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 1069857 (21 August 2018); doi: 10.1117/12.2314192
Show Author Affiliations
Gregory Allan, Massachusetts Institute of Technology (United States)
Ewan S. Douglas, Massachusetts Institute of Technology (United States)
Derek Barnes, Massachusetts Institute of Technology (United States)
Mark Egan, Massachusetts Institute of Technology (United States)
Gabor Furesz, Massachusetts Institute of Technology (United States)
Warren Grunwald, Massachusetts Institute of Technology (United States)
Jennifer Gubner, Massachusetts Institute of Technology (United States)
Wellesley College (United States)
Christian Haughwout, Massachusetts Institute of Technology (United States)
Bobby G. Holden, Massachusetts Institute of Technology (United States)
Paula do Vale Pereira, Massachusetts Institute of Technology (United States)
Abigail J. Stein, Massachusetts Institute of Technology (United States)
Kerri L. Cahoy, Massachusetts Institute of Technology (United States)


Published in SPIE Proceedings Vol. 10698:
Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave
Makenzie Lystrup; Howard A. MacEwen; Giovanni G. Fazio; Natalie Batalha; Nicholas Siegler; Edward C. Tong, Editor(s)

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