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Proceedings Article

General paraxial analysis of mechanically compensated zoom lenses

[+] Author Affiliations
Kazuo Tanaka

Canon, Inc. (Japan)

Proc. SPIE 3749, 18th Congress of the International Commission for Optics, 286 (July 19, 1999); doi:10.1117/12.354750
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From Conference Volume 3749

  • 18th Congress of the International Commission for Optics
  • Alexander J. Glass; Joseph W. Goodman; Milton Chang; Arthur H. Guenther; Toshimitsu Asakura
  • San Francisco, CA | August 02, 1999

abstract

It is analyzed a mechanically compensated zoom lens in which the second and fourth components are movable to attain zooming effects, while the first, third and fifth components are fixed during zooming. It is derived a set of quartic and two (or four) elements simultaneous zoom equations each of which simultaneously satisfies two paraxial conditions; continuous change of magnification (or focal length) and constant object-image distance. Analytical solutions are obtained together with an approximate zoom equation in the vicinity of a critical point and that near a singular point. Numerical example is added to show the effectiveness of the analysis.

© (1999) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Topics

Zoom lenses
Citation

Kazuo Tanaka
"General paraxial analysis of mechanically compensated zoom lenses", Proc. SPIE 3749, 18th Congress of the International Commission for Optics, 286 (July 19, 1999); doi:10.1117/12.354750; http://dx.doi.org/10.1117/12.354750


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