High ratio long-wave infrared continuous zoom system

Jing Yan; Quan Sun; Ying Liu; Hao Zhou; Kewei Huan; Xiao-guang Shi

doi:10.1117/12.2031824

11 September 2013 High ratio long-wave infrared continuous zoom system

Jing Yan, Quan Sun, Ying Liu, Hao Zhou, Kewei Huan, Xiao-guang Shi

Proceedings Volume 8907, International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications; 89070W (2013) https://doi.org/10.1117/12.2031824
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

As infrared zoom systems change the focal length continuously, remain images stability and keep good image quality during the process of zoom, it is widely applied to infrared navigation, infrared detection, infrared-guided etc vehicular and airborne area. In order to satisfy the growing demand of infrared continuous zoom system, a zoom ratio of ten times long-wave infrared continuous zoom optical system that based on an uncooled detector was designed. System guided by the zoom theory of positive groups of compensation, calculated the initial structure of the system and according to the system of optical parameters with using ZEMAX software for optical design did an aberration balance and optimized, then the optical system image quality was systematically analyzed and evaluated. The result showed that the modulation transfer function (MTF) was above 0.4 within the whole focal range at spatial frequency 16 lp/mm, the root mean square radius of maximum dispersion spot was smaller than a pixel dimension and it met the requirements of the system imaging quality when F/# was 2, continuous zoom range was from 40 mm to 400 mm and the image size was 12 mm. The design of the system realized the requirements of compact structure, large zoom ratio, easily assembled and excellent image quality to optical system for infrared imaging.

Citation Download Citation

Jing Yan, Quan Sun, Ying Liu, Hao Zhou, Kewei Huan, and Xiao-guang Shi "High ratio long-wave infrared continuous zoom system", Proc. SPIE 8907, International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications, 89070W (11 September 2013); https://doi.org/10.1117/12.2031824

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