Habitable world observatory modeling optical and metrology models, and performance predictions

John Z. Lou; David C. Redding; Scott Basinger; Branden Dube; Jonathan Tesch; Andy Kee; Carl Nissly; Mitch Troy

doi:10.1117/12.3030015

1 October 2024 Habitable world observatory modeling optical and metrology models, and performance predictions

John Z. Lou, David C. Redding, Scott Basinger, Branden Dube, Jonathan Tesch, Andy Kee, Carl Nissly, Mitch Troy

Proceedings Volume 13129, Optical Modeling and Performance Predictions XIV; 131290K (2024) https://doi.org/10.1117/12.3030015
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Abstract

The Habitable Worlds Observatory (HWO) is a future NASA flagship mission which will use a segmented telescope and coronagraphic instruments to discover and characterize exoplanets, including exoEarths – Earth-like planets orbiting other stars. HWO will require extraordinary optical stability, with wavefront drift performance measured in the picometers. This paper explores how active control of the telescope optics, using metrology systems that include laser distance gauges, segment edge sensors, and picometer precision actuators, can provide the needed telescope stability. Together with wavefront sensing and deformable mirrors in the coronagraph, this approach can control the entire coronagraphic beam train, to stabilize the electric field in the coronagraph. The HWO Technology Assessment Group is developing three “Exploratory Analytic Cases,” which are conceptual designs for HWO that differ in some respects, to provide a basis for detailed analysis. This paper addresses EAC1, a deployed-aperture concept that draws on JWST heritage. EAC1 uses 19 1.8-meter hexagonal segments to form its off-axis Primary Mirror (PM), as sketched in Figure 1. EAC2 will use fewer, larger “keystone” segments in a non-deployed off-axis PM configuration, and EAC3 will be a larger, on-axis deployed telescope using smaller keystone shaped segments.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

John Z. Lou, David C. Redding, Scott Basinger, Branden Dube, Jonathan Tesch, Andy Kee, Carl Nissly, and Mitch Troy "Habitable world observatory modeling optical and metrology models, and performance predictions", Proc. SPIE 13129, Optical Modeling and Performance Predictions XIV, 131290K (1 October 2024); https://doi.org/10.1117/12.3030015

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