Share Email Print

Proceedings Paper

Simple Quasi-Zoom With Stable Pupils
Author(s): Thomas H. Jamieson; William H. Taylor
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

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)

© SPIE. Terms of Use
Back to Top