Characteristics and control of linear astigmatism aberration in a nonaxially symmetric optical system

Jose Sasian, Weichuan Gao

Research output: Contribution to journalArticlepeer-review

Abstract

We examine the characteristics of linear astigmatism in a nonaxially symmetric optical system. The conventional view of interpreting linear astigmatism aberration using P and N focal surfaces is revisited. A perspective to explain and visualize the behavior of linear astigmatism is provided using the concept of field curves. Methods of controlling linear astigmatism are discussed, including a ray-tracing method using pupil imaging. Confocal mirror designs free from linear astigmatism are also discussed.

Original languageEnglish (US)
Article number051206
JournalOptical Engineering
Volume60
Issue number5
DOIs
StatePublished - May 1 2021

Keywords

  • confocal mirror design
  • field curve
  • freeform surfaces
  • linear astigmatism
  • pupil aberrations

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering(all)

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