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机载大变倍比大视场中波红外连续变焦光学系统设计

Design of Airborne Mid-Wave Infrared Continuous Zoom System With Large Zoom Range and Large Field

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摘要

针对机载光电侦察探测和跟踪吊舱大视场连续观察的应用需求,设计了一款大变倍比大视场连续变焦中波红外光学系统。该系统根据物像交换原则,采用正组补偿结构形式,变焦方式简单,变焦曲线平滑易加工实现,仅使用7片固定透镜和2片变焦透镜,即完成了变倍比为35倍,焦距13~460 mm,短焦视场40.5°×33°的中波红外连续变焦光学系统设计。结果表明,该系统在各焦段MTF曲线均接近衍射极限,32 lp/mm时均高于0.1,最短焦距全视场畸变小于4%,公差分配设计合理,且结构尺寸紧凑,变焦曲线行程短,对机载大视场连续变焦光学系统设计具有有益的参考价值。

Abstract

Aiming at the requirement of large field and continuous observation for airborne optoelectronic detection and tracking apparatus, an optical system of mid-wave infrared continuous zoom system with large zoom range and large field is designed. Based on the exchange principle of object and image, the style of zoom is very simple, and zoom curve is realized easily by positive group compensator. The system is composed of eight pieces of fixed lens and two pieces of moving lens, which achieves 35 zoom ratio, 13~460 mm of focal length, and 40. 5°×33°field of short focal length. The results showed that the MTF of every focal length is closing to the diffraction, which is upon 0. 1(32 lp/mm), distortion of all field on short focal length is below 4%, tolerance is reasonable, with compact structure, short zoom curve. This paper is beneficial to the design of airborne continuous zoom system with large field.

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中图分类号:O439

所属栏目:光学设计

收稿日期:2018-02-01

修改稿日期:2018-04-14

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作者单位    点击查看

张国伟:华中光电技术研究所—武汉光电国家研究中心, 湖北 武汉 430223
王海涛:华中光电技术研究所—武汉光电国家研究中心, 湖北 武汉 430223

联系人作者:张国伟(zhangguowei220@126.com)

备注:张国伟(1987-),男,硕士,工程师,主要研究方向为成像光学系统设计。

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引用该论文

ZHANG Guo-wei,WANG Hai-tao. Design of Airborne Mid-Wave Infrared Continuous Zoom System With Large Zoom Range and Large Field[J]. OPTICS & OPTOELECTRONIC TECHNOLOGY, 2018, 16(5): 20-25

张国伟,王海涛. 机载大变倍比大视场中波红外连续变焦光学系统设计[J]. 光学与光电技术, 2018, 16(5): 20-25

被引情况

【1】韩 星,芮 涛,于双双,张 振,张晨钟. 高变倍比中波制冷型连续变焦光学系统设计. 应用光学, 2019, 40(6): 998-1003

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