Abstract
We derive a general, closed-form expression for the diffraction
patterns including the aberrations that are due to off-axis alignment
and positioning∼, of a paraboloid mirror. The diffraction
patterns obtained in the focal plane of an off-axis paraboloidal mirror
suffer modifications by the aberrations that are inherent in these
surfaces: astigmatism and coma. Different magnifications in two
perpendicular spatial directions indicate astigmatism. The Airy
function, which affects a single spatial coordinate, describes the coma
aberration. We identified the coma by the increased number of
intensity zeros within adjacent lobules.
© 2001 Optical Society of America
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