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Proceedings Paper

Design of a wide angle zoom lens using an asphere to achieve superior solutions
Author(s): Takanori Yamanashi
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Paper Abstract

The main purpose of this paper is to introduce a high speed zoom lens for photography. The lens operates with a full field angle that encompasses more than 86 degrees and the corner illumination is more than 60 percent at the wide end. In addition, the paper provides guidance on how to effectively use an aspheric surface in the first lens group consisting of an NPNPP (negative, positive, negative, positive, and positive). This treatment includes distortion considerations. Useful design solutions using an aspheric surface are introduced along with assessment of the resulting designs. Finally, a strategy to correct field curvature in this zoom lens is shown with an example.

Paper Details

Date Published: 3 September 2015
PDF: 14 pages
Proc. SPIE 9580, Zoom Lenses V, 95800I (3 September 2015); doi: 10.1117/12.2189681
Show Author Affiliations
Takanori Yamanashi, Theta Optical LLC (United States)

Published in SPIE Proceedings Vol. 9580:
Zoom Lenses V
Ellis Betensky; Takanori Yamanashi, Editor(s)

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