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Proceedings Paper

Optical modeling and testing of the Deformable Mirror Demonstration Mission (DeMi) CubeSat payload
Author(s): Rachel Morgan; Gregory Allan; Ewan Douglas; Paula do Vale Pereira; Mark Egan; Gabor Furesz; Jennifer Gubner; Christian Haughwout; Bobby Holden; John Merk; Thomas Murphy; Abigail Stein; Yinzi Xin; Kerri Cahoy
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Paper Abstract

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.

Paper Details

Date Published: 9 September 2019
PDF: 9 pages
Proc. SPIE 11116, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems II, 111160E (9 September 2019);
Show Author Affiliations
Rachel Morgan, Massachusetts Institute of Technology (United States)
Gregory Allan, Massachusetts Institute of Technology (United States)
Ewan Douglas, The Univ. of Arizona (United States)
Paula do Vale Pereira, Massachusetts Institute of Technology (United States)
Mark Egan, MIT Kavli Institute for Astrophysics and Space Research (United States)
Gabor Furesz, MIT Kavli Institute for Astrophysics and Space Research (United States)
Jennifer Gubner, Massachusetts Institute of Technology (United States)
Christian Haughwout, Massachusetts Institute of Technology (United States)
Bobby Holden, Massachusetts Institute of Technology (United States)
John Merk, Aurora Flight Sciences, A Boeing Co. (United States)
Thomas Murphy, Massachusetts Institute of Technology (United States)
Abigail Stein, Massachusetts Institute of Technology (United States)
Yinzi Xin, Massachusetts Institute of Technology (United States)
Kerri Cahoy, Massachusetts Institute of Technology (United States)


Published in SPIE Proceedings Vol. 11116:
Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems II
Tony B. Hull; Dae Wook Kim; Pascal Hallibert, Editor(s)

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