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Proceedings Paper

Simple Quasi-Zoom With Stable Pupils
Author(s): Thomas H. Jamieson; William H. Taylor
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Paper Abstract

In conventional zoom systems with the aperture stop located to the rear of the moving components, the entrance pupil position varies greatly during zooming. A simple system of three positive elements, is described which can be used as a dual focal length quasi-zoom lens, which for a rear-positioned aperture stop, has a constant entrance pupil at the zoom extremes. The system may also be employed as a true zoom with limited excursion of the entrance pupil between the zoom extremes. The system is useful as a zoom relay stage in a periscope or where a prism or mirror is located at the entrance pupil to scan the line of sight.

Paper Details

Date Published: 16 June 1983
PDF: 6 pages
Proc. SPIE 0369, Max Born Centenary Conf, (16 June 1983); doi: 10.1117/12.934347
Show Author Affiliations
Thomas H. Jamieson, Kollmorgen Corporation (United States)
William H. Taylor, Kollmorgen Corporation (United States)

Published in SPIE Proceedings Vol. 0369:
Max Born Centenary Conf
M. John Colles; D. William Swift, Editor(s)

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