Wavefront control in space with MEMS deformable mirrors for exoplanet direct imaging
Author(s)Cahoy, K. L.; Marinan, A. D.; Novak, B.; Kerr, C.; Nguyen, T.; Webber, M.; Falkenburg, G.; Barg, A.; ... Show more Show less
To meet the high contrast requirement of 1 x 10(-10) to image an Earth-like planet around a sun-like star, space telescopes equipped with coronagraphs require wavefront control systems. Deformable mirrors (DMs) are a key element of a wavefront control system, as they correct for imperfections, thermal distortions, and diffraction that would otherwise corrupt the wavefront and ruin the contrast. The goal of the CubeSat DM technology demonstration mission is to test the ability of a microelectromechanical system (MEMS) DM to perform wavefront control on-orbit on a nanosatellite platform. We consider two approaches for an MEMS DM technology demonstration payload that will fit within the mass, power, and volume constraints of a CubeSat: (1) a Michelson interferometer and (2) a Shack-Hartmann wavefront sensor. We clarify the constraints on the payload based on the resources required for supporting CubeSat subsystems drawn from subsystems that we have developed for a different CubeSat flight project. We discuss results from payload laboratory prototypes and their utility in defining mission requirements.
SPIE-SOC Photo-Optical Instrumentation Engineers
Cahoy, KL, et al. "Wavefront Control in Space with MEMS Deformable Mirrors for Exoplanet Direct Imaging." Journal of Micro-Nanolithography Mems and Moems, vol. 13, no. 1, n.d. EBSCOhost, search.ebscohost.com/login.aspx?direct=true&db=edswsc&AN=000338630500014&site=eds-live&scope=site.
adaptive opticst, wavefront control, deformable mirror, high contrast, high-dynamic range, CubeSat, Super-Earths, planet, coronagraph, phase, star, atmospheres, telescope