JWST on-orbit multi-field wavefront control with a Kalman filter

John Z. Lou; David Redding; Norbert Sigrist; Yan Zhang; Scott Basinger

doi:10.1117/12.615383

24 August 2005 JWST on-orbit multi-field wavefront control with a Kalman filter

John Z. Lou, David Redding, Norbert Sigrist, Yan Zhang, Scott Basinger

Proceedings Volume 5867, Optical Modeling and Performance Predictions II; 58670T (2005) https://doi.org/10.1117/12.615383
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

An effective multi-field wavefront control (WFC) approach is demonstrated for the James Webb Space Telescope (JWST) on-orbit optical telescope element (OTE) fine-phasing using wavefront measurements at the NIRCam 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 JWST wavefront control process to further improve the robustness of the fine-phasing JWST OTE alignment will also be discussed. Through a comparison of WFC performances between the JWST 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.

Citation Download Citation

John Z. Lou, David Redding, Norbert Sigrist, Yan Zhang, and Scott Basinger "JWST on-orbit multi-field wavefront control with a Kalman filter", Proc. SPIE 5867, Optical Modeling and Performance Predictions II, 58670T (24 August 2005); https://doi.org/10.1117/12.615383

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