红外双波段共焦复合孔径光学系统设计  

Design of Infrared Dual-Band Confocal Composite Aperture Optical System

作　　者：党更明 高明[1] 范晨 陈阳[1] Dang Gengming;Gao Ming;Fan Chen;Chen Yang(School of Opto-electronic Engineering,Xi′an Technological University,Xi′an 710021,Shaanxi,China)

机构地区：[1]西安工业大学光电工程学院,陕西西安710021

出　　处：《光学学报》2023年第8期313-326,共14页Acta Optica Sinica

基　　金：陕西省自然科学基础研究计划(2019JM-470);陕西省教育厅科研计划(18JS048)。

摘　　要：为满足光电成像装备多元、广域、远距离探测的需求,提出了双波段复合孔径光学系统的概念。采用主副孔径配合探测搜索的方式,其中主孔径用于远距离探测,副孔径用于大视场搜索,并分析主副孔径与中继系统拼接函数以推导复合孔径共焦面方程,从而保证不同波段图像采集的同步性和一致性。设计的红外双波段复合孔径光学系统成像波段为3.7~4.8μm和7.7~9.5μm,复合孔径系统由5个子眼(1个主子眼和4个副子眼)构成,主孔径焦距为200 mm、视场角均为±6°,副孔径焦距为50 mm、视场角均为±12°,主副孔径光轴夹角为6°,合并后的总视场为24°。相对于均一型复合孔径系统而言,该系统兼具了远距离探测与大视场搜索功能,主副孔径系统与中继接收系统成像质量良好,在−40~60℃温度范围内无热差影响。Objective Traditional photoelectric reconnaissance equipment belongs to the single-aperture optical system,but the single-aperture optical system cannot effectively obtain the depth,precise position,and velocity of the target.In addition,although the resolution of the telephoto system in a single-aperture optical system is high,and the detection distance is far,the field-of-view angle for detection is small.Thus,it is difficult to carry out a real-time search in a wide area.Moreover,wide-angle cameras are usually short in focus and low in resolution and are not suitable for remote target detection and recognition.As a consequence,the single-aperture optical system cannot achieve a large field-of-view and high resolution at the same time,thereby being unable to give full play to the parallel processing ability.The single-band optical system is subject to the influence of external factors such as light and poor anti-interference performance and cannot achieve allweather target detection.Given the above background,a dual-band composite aperture optical system is proposed in this paper.Methods This paper analyzes the design concept of the composite aperture optical system and calculates its relevant design data by building a mathematical model for the field-of-view stitching.The conditions of the dual-band confocal and common image plane are analyzed to ensure the synchronization and consistency of image acquisition in different bands.Through the theoretical calculation of the relay image conversion system,the problem that the curved image formed by the composite aperture system cannot match with the plane detector is solved,and the composite aperture optical system is finally designed.The imaging wavebands of the composite aperture optical system consist of the medium wave infrared waveband and long wave infrared waveband.The main and subordinate apertures are used to cooperate with detection and search.The main aperture is used for remote detection,and the subordinate aperture is used for large field-of-view search

关 键 词：光学设计 红外双波段 复合孔径 共焦 

分 类 号：O439[机械工程—光学工程]