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基于Q-type非球面的双波段红外光学系统设计

Design of Dual-Band Infrared Optical System with Q-type Asphere

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摘要

与可见光系统相比,红外光学系统具有较高的隐密性、较强的目标识别性和抗干扰性能,在大雾、烟尘等恶劣环境下具有良好的穿透能力[1]。因为红外单波段成像系统获取的信息有限,且物体在中波红外和长波红外波段表现出不同的特性,所以可以利用双波段红外成像来获取更多的信息[2-3],从而提高对目标的探测精度。

Abstract

We design an uncooled dual-band infrared optical system whose operating wavelengths include 3-5-μm mid-wave infrared and 8-11-μm long-wave infrared wavelengths. The effective focal length of this system is 21 mm, and the F-number is 2.6. The system comprises four lenses fabricated with germanium and chalcogenide glass (Ge10As40Se50), and the fourth surface is a Q-type asphere. The system is optimized to achieve athermal effect. The design result shows excellent image quality in the temperature range of -40-60 ℃; additionally, the modulation transfer function is close to the diffraction limit. We design an optical system with an even asphere and the same initial parameters and structure. By comparing, we find that the Q-type asphere has more advantages in optical system design: its stronger ability to correct aberration and smaller deviation from the best-fit sphere are conducive to improving fabrication accuracy and efficiency.

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DOI:10.3788/AOS201939.1022001

所属栏目:光学设计与制造

基金项目:吉林省重点科技研发项目;

收稿日期:2019-04-10

修改稿日期:2019-06-03

网络出版日期:2019-10-01

作者单位    点击查看

贾孟:长春理工大学光电工程学院, 吉林 长春 130022
薛常喜:长春理工大学光电工程学院, 吉林 长春 130022

联系人作者:薛常喜(xcx272479@sina.com)

备注:吉林省重点科技研发项目;

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引用该论文

Meng Jia,Changxi Xue. Design of Dual-Band Infrared Optical System with Q-type Asphere[J]. Acta Optica Sinica, 2019, 39(10): 1022001

贾孟,薛常喜. 基于Q-type非球面的双波段红外光学系统设计[J]. 光学学报, 2019, 39(10): 1022001

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