可见-短波红外宽波段30倍连续变焦光学系统设计(特邀)  

30×VIS-SWIR wideband zoom lens design(invited)

作　　者：曲锐[1] 张洪伟 郭惠楠[1] 李剑[2] QU Rui;ZHANG Hongwei;GUO Huinan;LI Jian(Xi’an Institute of Optical and Precision Mechanics,Chinese Academy of Sciences,Xi’an 710119,China;Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621900,China)

机构地区：[1]中国科学院西安光学精密机械研究所,陕西西安710119 [2]中国工程物理研究院流体物理研究所,四川绵阳621900

出　　处：《红外与激光工程》2024年第10期55-61,共7页Infrared and Laser Engineering

基　　金：中国科学院青年创新促进会项目(2023422)。

摘　　要：可见-短波红外宽波段共焦面变焦光学系统是实现光电系统高功能密度化的重要手段,但光学材料在该波段范围内表现出较大的色散特性差异,给相应波段连续变焦系统的设计造成较大困难。针对该问题,文中从连续变焦系统设计模型出发,结合宽波段光学系统设计中的消色差条件,论述了一种宽波段变焦系统中各组元材料选择的方法,指出了胶合元件在宽波段光学系统设计中的特殊用途,设计完成了一款宽波段连续变焦光学系统,该系统F≤5.5、焦距范围为10~300 mm、水平视场38.8°~1.25°、工作波段范围为0.48~1.7μm,适配1080 P、像元3.45μm的InGaAs探测器,可通过切换滤光片实现多波段成像,还可通过切换机构或分色棱镜实现彩色/透雾/激光/微光等不同功能的共孔径集成。所述系统透镜总数为18片,采用了7种普通光学玻璃材料,总长不大于190 mm,在整个变焦范围内,均表现出优良的成像质量。Objective High function density electro-optical(EO)system is becoming an important development direction at present and in the near future.With the gradual maturity of wide-band infrared detector technology,VIS-SWIR(from visible to short wave infrared)wide-band confocal zoom optical system,which can support various operational modes such as color imaging,fog penetration,and low-light conditions,effectively simplify the overall design of EO systems,turns into an important mean to realize the high functional density and SWaP&C(Size,Weight,Power,and Cost)of EO system,but optical materials show great differences in dispersion characteristics within this band,which makes design of continuous zoom system difficult and time-consuming.Studying of the corresponding optical system design method become necessary and urgent.Methods In order to solve this problem,a wide band zoom optical design model(Eq.(1)-Eq.(3))is established with the combination of classical continuous zoom system design model and the achromatic conditions in the design of wide-band optical system.The parameters affecting the color aberration distribution of the whole system are explicitly demonstrated in the model.Based on the proposed model,the methods of optical power distribution and material selection are further discussed.Considering the dispersion characteristics of glass materials in different bands,some material using guidelines with examples in Tab.1 of wideband zoom lens design is provided.The extraordinary applications of the cemented elements,especially the synthetic abnormal dispersion characteristics and its synthetic method,are pointed out explicitly.Results and Discussions A wideband(VIS-SWIR)optical system under the requirements of F≤5.5,focal length 10-300 mm,horizontal field of view 38.8°-1.25°,waveband of 0.48-1.7μm,1080 P InGaAs detector with pixel size of 3.45μm is designed(Fig.3)to fulfill multi-band imaging by switching filters,and realize the common aperture integration of different functions such as color/fog-penetrating/l

关 键 词：光学设计 连续变焦 宽波段 INGAAS探测器 红外技术 

分 类 号：O435[机械工程—光学工程] O439[理学—光学]