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

Mau-Shiun Yeh; Shin-Guo Shiue; Mao-Hong Lu

doi:10.1117/1.601245

1 April 1997 First-order analysis of a three-lens afocal zoom system

Mau-Shiun Yeh, Shin-Guo Shiue, Mao-Hong Lu

Optical Engineering, Vol. 36, Issue 4, (April 1997). https://doi.org/10.1117/1.601245

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.

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Mau-Shiun Yeh, Shin-Guo Shiue, and Mao-Hong Lu "First-order analysis of a three-lens afocal zoom system," Optical Engineering 36(4), (1 April 1997). https://doi.org/10.1117/1.601245

Published: 1 April 1997

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