Abstract

An apodization scheme (due to Luneberg) for increasing the incoherent Sparrow resolution limit is formulated via the calculus of variations. The determination of the required pupil function (amplitude distribution over the exit pupil) necessitates the solution of an homogeneous Fredholm integral equation. The four pupil-function parameters are evaluated by solving a set of four simultaneous nonlinear equations. Both slit and circular apertures are studied in detail.

© 1963 Optical Society of America

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