Wavefront correction using MEMS deformable mirror for Earth observation satellite with large segmented telescope

Makoto Hirose; Ayaka Kumeta; Norihide Miyamura; Seichi Sato; Tadahito Mizutani; Toshiyoshi Kimura

doi:10.1117/12.2563139

13 December 2020 Wavefront correction using MEMS deformable mirror for Earth observation satellite with large segmented telescope

Makoto Hirose, Ayaka Kumeta, Norihide Miyamura, Seichi Sato, Tadahito Mizutani, Toshiyoshi Kimura

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Proceedings Volume 11448, Adaptive Optics Systems VII; 114487D (2020) https://doi.org/10.1117/12.2563139
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

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Abstract

A demand for responsive, high-resolution Earth observations is emerging for mitigating the human suffering and damage that follow large-scale disasters. One of the most promising advances is a sophisticated optical imager with a large, 3.6-m satellite-mounted telescope in geostationary orbit. The imager of the proposed space telescope has a segmented mirror and offers a ground sampling distance of better than 10 m and a latency of shorter than 30 minutes. For the imager to realize diffraction-limited performance, deformable mirrors are planned to be installed at the exit pupil of the telescope system. One candidate for the deformable mirrors in segmented telescope is based on a micro-electromechanical system (MEMS) that offers a small actuator pitch, fine step resolution, and excellent hysteretic motion response. This paper presents the wavefront correction of aberrations with a high and low spatial frequency using MEMS deformable mirror on an optical testbed. The expected image quality is also evaluated through numerical simulation.

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Makoto Hirose, Ayaka Kumeta, Norihide Miyamura, Seichi Sato, Tadahito Mizutani, and Toshiyoshi Kimura "Wavefront correction using MEMS deformable mirror for Earth observation satellite with large segmented telescope", Proc. SPIE 11448, Adaptive Optics Systems VII, 114487D (13 December 2020); https://doi.org/10.1117/12.2563139

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