APLC-Optimization: an apodized pupil Lyot coronagraph design survey toolkit

Abstract

We present a publicly available software package developed for exploring apodized pupil Lyot coronagraph (APLC) solutions for various telescope architectures. In particular, the package optimizes the apodizer component of the APLC for a given focal-plane mask and Lyot stop geometry to meet a set of constraints (contrast, bandwidth etc.) on the coronagraph intensity in a given focal-plane region (i.e. dark zone). The package combines a high-contrast imaging simulation package HCIPy with a third-party mathematical optimizer (Gurobi) to compute the linearly optimized binary mask that maximizes transmission. We provide examples of the application of this toolkit to several different telescope geometries, including the Gemini Planet Imager (GPI) and the High-contrast imager for Complex Aperture Telescopes (HiCAT) testbed. Finally, we summarize the results of a preliminary design survey for the case of a 6~m aperture off-axis space telescope, as recommended by the 2020 NASA Decadal Survey, exploring APLC solutions for different segment sizes. We then use the Pair-based Analytical model for Segmented Telescope Imaging from Space (PASTIS) to perform a segmented wavefront error tolerancing analysis on these solutions.

17 pages, 16 figures, SPIE conference

References in corpus (8)

• The Gemini Planet Imager: First Light
• Fast computation of Lyot-style coronagraph propagation
• The LUVOIR Mission Concept Study Final Report
• Apodized Pupil Lyot Coronagraphs for Arbitrary Apertures. IV. Reduced Inner Working Angle and Increased Robustness to Low-Order Aberrations
• Analytical tolerancing of segmented telescope co-phasing for exo-Earth high-contrast imaging
• Apodized pupil Lyot coronagraphs designs for future segmented space telescopes
• Exploiting symmetries and progressive refinement for apodized pupil Lyot coronagraph design
• Segment-level thermal sensitivity analysis for exo-Earth imaging