Optical modeling and testing of the Deformable Mirror Demonstration Mission (DeMi) CubeSat payload
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Author(s)
Morgan, Rachel E.
Allan, Gregory
Douglas, Ewan
do Vale Pereira, Paula
Egan, Mark
Furesz, Gabor
Gubner, Jennifer
Haughwout, Christian
Holden, Bobby
Merk, John
Date Issued
September 9, 2019
Journal
Proceedings of SPIE - The International Society for Optical Engineering
Publisher
SPIE
Citation
Morgan, Rachel E., Allan, Gregory, Douglas, Ewan, do Vale Pereira, Paula, Egan, Mark et al. 2019. "Optical modeling and testing of the Deformable Mirror Demonstration Mission (DeMi) CubeSat payload." Proceedings of SPIE - The International Society for Optical Engineering, 11116.
Version
Final published version
Abstract
© 2019 SPIE. The Deformable Mirror Demonstration Mission (DeMi) is a 6U CubeSat that will characterize the on-orbit performance of a Microelectromechanical Systems (MEMS) deformable mirror (DM) with both an image plane wavefront sensor and a Shack-Hartmann wavefront sensor (SHWFS). Coronagraphs on future space telescopes will require precise wavefront control to detect and characterize Earth-like exoplanets. High-actuator count MEMS deformable mirrors can provide wavefront control with low size, weight, and power. The DeMi payload will characterize the on-orbit performance of a 140 actuator MEMS Deformable Mirror (DM) with 5.5 μm maximum stroke, with a goal of measuring individual actuator wavefront displacement contributions to a precision of 12 nm. The payload will be able to measure low order aberrations to λ/10 accuracy and λ/50 precision, and will correct static and dynamic wavefront phase errors to less than 100 nm RMS. We present an overview of the payload design, the assembly, integration, and test process, and report on the development and validation of an optical diffraction model of the payload. Launch is planned for late 2019.
MIT Department
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
MIT Kavli Institute for Astrophysics and Space Research
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1117/12.2529540
