Author:
Douglas Ewan S.,Allan Greg,Morgan Rachel,Holden Bobby G.,Gubner Jennifer,Haughwout Christian,do Vale Pereira Paula,Xin Yinzi,Merk John,Cahoy Kerri L.
Abstract
The Deformable Mirror Demonstration Mission (DeMi) is a technology demonstration CubeSat to test a 140 actuator micro-electromechanical system (MEMS) deformable mirror in low-Earth orbit. Such mirrors can provide precise wavefront control with low size, weight, and power per actuator. Hence, they have the potential of improving contrast in coronagraphs on future space telescopes. In the DeMi payload, a Shack Hartmann lenslet array based wavefront sensor monitors the deformable mirror, illuminated by either an internal 636 nm laser diode or external starlight. This work describes the instrument design drivers and CubeSat implementation, and briefly illustrates operation on orbit by comparing ground-based measurements of a displaced actuator to an on-orbit measurement using the internal laser source. The 6U CubeSat was launched on February 25, 2020 and deployed from the International Space Station on July 13, 2020.
Funder
Defense Advanced Research Projects Agency
Arizona Board of Regents
National Aeronautics and Space Administration
Subject
Astronomy and Astrophysics
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