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Improving resolution in passive direct imaging with off-axis aberrations

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June 14, 2025

Abstract

Imaging systems with off-axis Seidel aberrations are shown to exhibit improved resolution of general object intensity distributions compared to the diffraction-limited system. The Fisher information for the estimation for unknown object intensity values in such systems is greater due to the increased sensitivity of their response to similar object scenes, via shift variance. This improvement in resolution is demonstrated for systems in which image-plane photons have Poisson or additive Gaussian statistics.

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