Expert system for generating initial layouts of zoom systems with multiple moving lens groups

Xuemin Cheng, Yongtian Wang, Qun Hao, Jose M. Sasian

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

An expert system is developed for the automatic generation of initial layouts for the design of zoom systems with multiple moving lens groups. The Gaussian parameters of the zoom system are optimized using the damped-least-squares method to achieve smooth zoom cam curves, with the f-number of each lens group in the zoom system constrained to a rational value. Then each lens group is selected automatically from a database according to its range of f-number, field of view, and magnification ratio as it is used in the zoom system. The lens group database is established from the results of analyzing thousands of zoom lens patents. Design examples are given, which show that the scheme is a practical approach to generate starting points for zoom lens design.

Original languageEnglish (US)
Pages (from-to)1-8
Number of pages8
JournalOptical Engineering
Volume44
Issue number1
DOIs
StatePublished - Jan 1 2005

Keywords

  • Expert system
  • Lens group database
  • Optical design
  • Zoom lenses

ASJC Scopus subject areas

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

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