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Proceedings Paper

Design of large aperture four group elements mid-wave infrared zoom lens
Author(s): Yiqun Ji; Rongbao Shi; Hucheng He; Weimin Shen
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Paper Abstract

Zoom lens with variable focal length is well fit for researching objectives far and near. Design of zoom lens working at mid-wave infrared wavelength (7.7-10.3_m) and its view field 10 degrees is presented. Determination of the initial configuration of the variable and the compensate groups are discussed according to the mechanism compensate curves. The compensate group is determined with positive power. Its focal length changes during a large scope, which is from 300mm to 100mm. And the corresponding F number variables from 3.75 to 1.25. So the residual aberration needs to be carefully corrected. The optimized zoom lens is composed of four group elements, and its performance reaches diffraction limited at each focal position.

Paper Details

Date Published: 11 October 2012
PDF: 6 pages
Proc. SPIE 8486, Current Developments in Lens Design and Optical Engineering XIII, 84861A (11 October 2012); doi: 10.1117/12.930420
Show Author Affiliations
Yiqun Ji, Soochow Univ. (China)
Rongbao Shi, Soochow Univ. (China)
Hucheng He, Soochow Univ. (China)
Weimin Shen, Soochow Univ. (China)

Published in SPIE Proceedings Vol. 8486:
Current Developments in Lens Design and Optical Engineering XIII
R. Barry Johnson; Virendra N. Mahajan; Simon Thibault, Editor(s)

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