Articles

First-order analysis of a three-lens afocal zoom system

[+] Author Affiliations
Mau-Shiun Yeh, Shin-Gwo Shiue, Mao-Hong Lu

National Chiao Tung University, Institute of Electro-Optical Engineering, 1001 Ta Hsueh Road, Hsin Chu 30050, Taiwan

Opt. Eng. 36(4), 1249-1258 (Apr 01, 1997). doi:10.1117/1.601245
History: Received July 30, 1996; Revised Nov. 13, 1996; Accepted Nov. 14, 1996
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Abstract

A general analysis for the first-order design of a three-lens afocal zoom system with one lens fixed is presented. The reasonable solution areas in the focal length diagrams with positive or negative magnification are derived and shown graphically. The relation between the two separations of the three lenses in zooming is found to be a hyperbola. According to the different locations of hyperbola centers, four cases are analyzed. From the four hyperbolic graphs, we get five different types of zoom systems. For each zoom type, we find the maximum range of magnification and the position where the maximum or minimum system length occurs during zooming. The zoom loci for the first or second lens fixed are also discussed. © 1997 Society of Photo-Optical Instrumentation Engineers.

© 1997 Society of Photo-Optical Instrumentation Engineers

Topics

Lenses ; Zoom lenses

Citation

Mau-Shiun Yeh ; Shin-Gwo Shiue and Mao-Hong Lu
"First-order analysis of a three-lens afocal zoom system", Opt. Eng. 36(4), 1249-1258 (Apr 01, 1997). ; http://dx.doi.org/10.1117/1.601245


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