Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 4 of 4 for “"Coronagraphy"”.
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Space-variant optical phase retarders in liquid crystal polymers and their applications
… analysis, beam splitting, phase mask coronagraphy, optical tweezers … The present thesis is dedicated to the development of space-variant retarders made out of liquid crystal polymers recorded by polarization holography. The liquid crystals define the fast axis orientation of the …
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Coronagraphic data post-processing using projections on instrumental modes
… and circumstellar disks. Despite advances in coronagraphy and wavefront control, high contrast observations are still plagued by residual wavefront aberrations. Post-processing techniques can provide an additional boost in separating residual aberrations from an astrophysical signal. This work …
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Ray-based Physical Optics for the Design of Astronomical Observatories
… to quantify the influence of polarization on coronagraphy, and propose a novel method to mitigate polarization aberrations. These integrated methods of physical optics calculation unite the geometric regime of light with the physical regime, providing powerful insights into the performance of …
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Beyond the speckles: New horizons in high-contrast imaging for exoplanet science
Direct imaging of exoplanets offers a uniquely powerful way of characterizing planetary atmospheres, surface conditions, and potential biological markers beyond our solar system. However, the extreme contrast and small angular separations involved present significant observational challenges that …