Optical modeling and testing of the Deformable Mirror Demonstration Mission (DeMi) CubeSat payload

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.

Original languageEnglish (US)
Title of host publicationAstronomical Optics
Subtitle of host publicationDesign, Manufacture, and Test of Space and Ground Systems II
EditorsTony B. Hull, Dae Wook Kim, Pascal Hallibert
PublisherSPIE
ISBN (Electronic)9781510629257
DOIs
StatePublished - 2019
EventAstronomical Optics: Design, Manufacture, and Test of Space and Ground Systems II 2019 - San Diego, United States
Duration: Aug 12 2019Aug 15 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11116
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceAstronomical Optics: Design, Manufacture, and Test of Space and Ground Systems II 2019
Country/TerritoryUnited States
CitySan Diego
Period8/12/198/15/19

Keywords

  • Adaptive optics
  • CubeSats
  • MEMS Deformable Mirrors
  • Shack Hartmann
  • Wavefront sensor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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