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Passive pupil correction as applied to annular field systems

1999; SPIE; Volume: 38; Issue: 4 Linguagem: Inglês

10.1117/1.602108

1560-2303

Jose ́ M. Sasia ́n,

Optical Coatings and Gratings

We present a technique to improve the performance of an annular field system that has a uniform aberration residual and an element at the stop or one of the pupils. The technique entails to departing from axial symmetry by introducing a nonaxially symmetric asphericity. Depending on the angular field extent an improvement in root mean square (rms) of 30% or more can be achieved.