采用相位板的中波红外共形光学系统设计  

Design of a middle-wavelength infrared conformal optical system using phase plate

作　　者：李升辉 孙祥仲 LI Shenghui;SUN Xiangzhong(School of Cyber Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;Center for Practice Innovations, Huazhong University of Science and Technology, Wuhan 430074, China)

机构地区：[1]华中科技大学网络空间安全学院,武汉430074 [2]华中科技大学工程实践创新中心,武汉430074

出　　处：《激光技术》2022年第2期283-287,共5页Laser Technology

摘　　要：为了满足现代军事装备中的侦查需求,提出了一种新型的红外共形成像光学系统,在消除光学头罩引入的复杂像差过程中,采用一对轴向移动的相位板来实现像差动态校正。给出了一个红外共形成像光学系统设计实例,其工作谱段为3.7μm~4.8μm,焦距为40mm,长径比为1.0,瞬时视场为2°,扫描视场为±15°。结果表明,在奈奎斯特频率17lp/mm处,各个扫描视场的调制传递函数均大于0.6,系统的光学传递函数接近衍射极限,各个扫描视场的弥散斑都小于30μm,适用于像元尺寸为30μm×30μm的中红外制冷型焦平面阵列探测器。该研究对于促进新型成像光学装备在军事领域中的进一步的发展、应用是有帮助的。To meet the demand of reconnaissance in modern military equipment,a novel conformal infrared optical system was presented.Two axial translation phase plate were used to correct the dynamic aberrations which were caused by the conformal structure.For the designed optical system,the working band was 3.7μm~4.8μm,the focal length was 40mm,the ratio of length to aperture was 1.0,the instantaneous angle was 2°,and the scan angle is±15°,respectively.The results show that the modulation transfer function of each scan fields of view is greater than 0.6 with the nyquist frequency of 17lp/mm,and the optical transfer function is comparable to the diffraction limit.The spot of several scan fields is less than 30μm and falls within the area of one pixel.The designed optical system with well optical performance can be a suitable candidate for the application of the mid-infrared refrigerated focal plane array detector with the pixel size of 30μm×30μm.This research is potentially helpful for the further development and application of new imaging optical equipment in the military field.

关 键 词：成像系统 相位板 像差校正 共形光学系统 中波红外 

分 类 号：TN202[电子电信—物理电子学]