12 July 2008 Telescope multi-field wavefront control with a Kalman filter
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Abstract
An effective multi-field wavefront control (WFC) approach is demonstrated for an actuated, segmented space telescope using wavefront measurements at the exit pupil, and the optical and computational implications of this approach are discussed. The integration of a Kalman Filter as an optical state estimator into the wavefront control process to further improve the robustness of the optical alignment of the telescope will also be discussed. Through a comparison of WFC performances between on-orbit and ground-test optical system configurations, the connection (and a possible disconnection) between WFC and optical system alignment under these circumstances are analyzed. Our MACOS-based [2] computer simulation results will be presented and discussed.
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John Z. Lou, David Redding, Norbert Sigrist, Scott Basigner, "Telescope multi-field wavefront control with a Kalman filter", Proc. SPIE 7010, Space Telescopes and Instrumentation 2008: Optical, Infrared, and Millimeter, 701043 (12 July 2008); doi: 10.1117/12.788198; https://doi.org/10.1117/12.788198
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KEYWORDS
Wavefronts

Telescopes

Space telescopes

Phase modulation

Error analysis

Cameras

Optical alignment

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