CAJ | 학술논문

由于红外具有能识别伪装、可昼夜工作和被动工作的优势而被广泛地应用于跟踪和搜索系统。而这些系统要求红外光学系统成像清晰、结构紧凑、可适应较大的温度变化。依据光学被动消热差的方法设计了可在较宽温度范围工作、成像质量优良、结构紧凑、体积小的红外中波摄远物镜，其摄远比可达到0.6。系统参数如下：工作波段为3～5?m，焦距150 mm，F数为3，工作温度为－40℃～60℃。设计结果显示，该系统仅采用3片透镜并利用衍射元件消热差完成了无热化的要求，减少了系统的成本及重量，传递函数在17 lp/mm处均在0.8以上，与衍射极限十分接近，满足在宽温度范围内工作成像质量高及系统小型化的要求。
유우홍외구유능식별위장、가주야공작화피동공작적우세이피엄범지응용우근종화수색계통。이저사계통요구홍외광학계통성상청석、결구긴주、가괄응교대적온도변화。의거광학피동소열차적방법설계료가재교관온도범위공작、성상질량우량、결구긴주、체적소적홍외중파섭원물경，기섭원비가체도0.6。계통삼수여하：공작파단위3～5?m，초거150 mm，F수위3，공작온도위－40℃～60℃。설계결과현시，해계통부채용3편투경병이용연사원건소열차완성료무열화적요구，감소료계통적성본급중량，전체함수재17 lp/mm처균재0.8이상，여연사겁한십분접근，만족재관온도범위내공작성상질량고급계통소형화적요구。
Infrared system has many advantages, such as recognizing camouflage, working all day, passive work and so on, so it is widely used in tracking and searching systems. However, these systems require that the infrared optical system has clear image, compact structure and can adapt to large temperature variations. According to the optical passive athermalized methods, a mid-wave infrared telephoto lens is designed. It can work in a wide temperature range, has excellent image quality, compact structure, and small volume. The telephoto ratio can reach 0.6. The parameters of system are as follows:working band is 3-5?m, focal length is 150 mm, F number is 3, and the working temperature is -40℃-60℃. The results show that the system only uses three lenses and diffractive elements to achieve athermalization requirements. It reduces cost and weight of the system, modulation transfer function is above 0.8 at 17 lp/mm and close to the diffraction limit. It achieves the requirements that have excellent image quality over a wide temperature range and miniaturization.