Phase pupil functions for reduction of defocus and spherical aberrations

Samir Mezouari, Andrew R. Harvey

Research output: Contribution to journalArticlepeer-review

197 Citations (Scopus)


Radially symmetric pupil plane phase retardation functions are derived that extend focal depth and alleviate third-order spherical aberration (SA) effects. The radial symmetry of these functions means that they can be more conveniently manufactured by use of traditional techniques such as diamond machining than previously reported filters with rectangular symmetry. The method employs minimization of the variation of Strehl ratio with defocus, W20, and SA, W40. The performance of the derived phase filters is illustrated by comparison with standard optical systems and with previously reported phase filters. © 2003 Optical Society of America.

Original languageEnglish
Pages (from-to)771-773
Number of pages3
JournalOptics Letters
Issue number10
Publication statusPublished - 15 May 2003


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