Advances in Coronagraphy for Future Space Missions: Interferometric Apodization through Homothety (IAH) and its Application in APLC Coronagraphs

Abstract Our study addresses the challenges of direct exoplanet observation by introducing an innovative technique based on numerical simulations. We developed and evaluated a method combining Lyot coronagraphy with an Interferometric Apodization by Homothety (IAH) in segmented apertures, aimed at next-generation large telescopes. Simulations conducted using a wavelength range centered around 0.5 μm with a 20% bandwidth show significant improvements in contrast and reduced angular separations. The technique demonstrates low chromaticity, maintaining almost constant contrast across the wavelength range, an advantage over traditional methods. These findings represent a breakthrough in enhancing exoplanet imaging capabilities, enabling more precise detection even at low angular separations, and emphasize the critical role of numerical simulations in designing high dynamic range space imaging techniques.