CAJ | 학술논문

采用透射二次成像光学系统结构形式，实现了远射比为1，F数为1.67，变倍比为4.6的红外双视场光学系统设计。采用光学元件切换变倍方式，配合电磁阀切换机构实现了60 ms的变倍速率；采用光学被动补偿方式，通过适当的光学和结构材料匹配，实现了-40～＋50℃无热化设计。设计结果表明：光学系统在不同温度下各视场调制传递函数在特征频率为20 lp/mm时接近衍射极限，空间排布紧凑，视场切换速度快，该双视场红外光学系统满足应用需求。
채용투사이차성상광학계통결구형식，실현료원사비위1，F수위1.67，변배비위4.6적홍외쌍시장광학계통설계。채용광학원건절환변배방식，배합전자벌절환궤구실현료60 ms적변배속솔；채용광학피동보상방식，통과괄당적광학화결구재료필배，실현료-40～＋50℃무열화설계。설계결과표명：광학계통재불동온도하각시장조제전체함수재특정빈솔위20 lp/mm시접근연사겁한，공간배포긴주，시장절환속도쾌，해쌍시장홍외광학계통만족응용수구。
In this paper , a refractive optical system with secondary image is adopted to realize 1.67 F number and 4.6 zoom ratio , and the ratio between the total length and focal length is 1 , and the zooming lens group is driven by solenoid pilot actuated valve switching structure to complete zooming in 60 ms.In addition, an opti-cal passive compensation method is used to realize an athermalized design in the range of -40~+50 ℃ by choosing proper optical and structural materials .The design results show that the optical system′s modulation transfer function in each field is close to the diffraction limit at different temperatures under the characteristic frequency of 20 lp/mm and the system size is compact with fast FOV switching .Finally , it is proved that this dual-FOV infrared optical system can meet the requirements for application .