Variable spherical aberration generators

Matthew T. Chang, Jose Sasian

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


Most variable spherical aberration generators have differential moving components or floating elements, much like a regular zoom lens but with insignificantly small overall magnification change over the "zoom" range. The main purpose of the differential movements is to generate a variable amount of spherical aberration (SA). Such aberration generators can be used as standalone systems for aberration control or as subsystems for aberration compensation. The theory can also be applied to macro focusing mechanism as well as soft-focus mechanism. This paper presents a survey of different variable SA generation mechanisms. Examples of some applications of the theory are presented.

Original languageEnglish (US)
Pages (from-to)217-228
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1997
EventZoom Lenses II - San Diego, CA, United States
Duration: Jul 28 1997Jul 29 1997


  • Aberration generator
  • Floating element
  • Macro focus lens
  • Microscope objective
  • Soft-focus lens
  • Spherical aberration

ASJC Scopus subject areas

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


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