The deformable mirror demonstration mission (DeMi) CubeSat: optomechanical design validation and laboratory calibration

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

doi:10.1117/12.2314192

21 August 2018 The deformable mirror demonstration mission (DeMi) CubeSat: optomechanical design validation and laboratory calibration

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

Author Affiliations +

Proceedings Volume 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave; 1069857 (2018) https://doi.org/10.1117/12.2314192
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

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.

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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, and Kerri L. Cahoy "The deformable mirror demonstration mission (DeMi) CubeSat: optomechanical design validation and laboratory calibration", Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 1069857 (21 August 2018); https://doi.org/10.1117/12.2314192

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