## Abstract

Paraxial optics is generally regarded as yielding ideal spherical wavefronts. The ideal point spread function for a circular aperture with an ideal spherical wavefront is an Airy disk. In paraxial optics a small rotation of the exiting polarization state occurs off-axis in the direction perpendicular to the meridional plane. This is a linear form of skew aberration. The resulting apodization of the co and crossed-polarized components in the exit pupil modify the point spread function (PSF) of paraxial optics. In the cross-polarized term, the pupil amplitude varies linearly through a value of zero along the meridional plane, like the function f(x,y) = k x. The Fourier transform of this pupil function is the Fourier transform of the derivative of the Airy disk, which results in a cross-polarized PSF component much larger than the Airy disk. The cause of this polarization rotation, known as skew aberration, is related to the parallel transport of the polarization state through the optical system along skew rays, and to the Berry phase. These cross-polarized PSF components, which although very small in paraxial optics, are nevertheless not zero. Since they occur within paraxial optics they are thus intrinsically interesting. These polarization effects are not related to the Fresnel equations or to any coating-induced polarization but occur in a nonpolarizing or polarizing optical systems.

Original language | English (US) |
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Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |

Publisher | SPIE |

Volume | 9578 |

ISBN (Print) | 9781628417449, 9781628417449 |

DOIs | |

State | Published - 2015 |

Event | Conference on Current Developments in Lens Design and Optical Engineering XVI - San Diego, United States Duration: Aug 10 2015 → Aug 11 2015 |

### Other

Other | Conference on Current Developments in Lens Design and Optical Engineering XVI |
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Country | United States |

City | San Diego |

Period | 8/10/15 → 8/11/15 |

## Keywords

- Berry phase
- paraxial optics
- Polarization
- polarization aberration
- ray tracing
- skew aberration

## ASJC Scopus subject areas

- Applied Mathematics
- Computer Science Applications
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics