Circularly symmetric phase filters for control of primary third-order aberrations: coma and astigmatism

Abstract

A quartic phase retardation function is described that reduces the variation of the intensity of the focal point of incoherent imaging systems suffering from primary third-order aberrations limited to coma and astigmatism. Corresponding modulation transfer functions are shown to remain practically invariant for moderate amounts of coma and astigmatism.

© 2006 Optical Society of America

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