3 papers
astro-ph.IM2024
Computation of the Fresnel diffraction of starshades based on a polygonal approximation
Simon Prunet, Claude Aime, André Ferrari +1
The design of starshades, i.e. external occulters for stellar coronography, relies on the fast and precise computation of their associated diffraction patterns of incoming plane wa…
astro-ph.IM2024
A comparison of solar and stellar coronagraphs that make use of external occulters
Claude Aime, Céline Theys, Simon Prunet +1
Solar and stellar externally occulted coronagraphs share similar concepts, but are actually very different because of geometric characteristics. Solar occulters were first develope…
math.OC2013
A normalized scaled gradient method to solve non-negativity and equality constrained linear inverse problem - Application to spectral mixture analysis
Céline Theys, Henri Lantéri, Nicolas Dobigeon +3
This paper addresses the problem of minimizing a convex cost function under non-negativity and equality constraints, with the aim of solving the linear unmixing problem encountered…