光学学报, 2014, 34 (5): 0522003, 网络出版: 2014-04-18
紧凑型无热化非制冷红外光学系统设计 下载: 503次
Design of Compact Athermalizing Uncooled Infrared Optical System
光学设计 红外光学系统 无热化 折反射式光学系统 optical design infrared optical system athermalization catadioptric optical system
摘要
随着非制冷红外探测器技术的快速发展,非制冷红外光学系统得到了广泛应用。为满足机载或弹载非制冷红外光学系统结构尺寸紧凑、相对孔径大、温度适应性强、杂散光抑制能力高的要求,采用折反射式二次成像光学系统结构形式,实现了远射比0.55,F数0.8的光学系统设计,同时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,并配合一次像面处视场光阑保证光学系统具有较高的杂散光抑制能力。给出了完整的光学系统设计,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接近衍射极限,空间排布紧凑。通过高低温成像实验,验证了该非制冷红外光学系统满足机载或弹载应用的环境要求。
Abstract
With rapid growth of uncooled infrared detector technology, uncooled infrared optical systems are widely used. The uncooled infrared optical system must fulfill the requirements of compact size, large relative aperture, high temperature adaptability and stray light suppression ability. A catadioptric optical system with secondary image is adopted to realize the design parameters of 0.55 ratio of total length and focal length and 0.8 F number. In addition, the optical passive compensation method is used to realize an athermalized design in the temperature range of -40 ℃~50 ℃ by matching optical and structural materials properly, and the field stop in the first image can ensure the optical system a high stray light suppression ability. The design result shows that optical system′s modulation transfer function in each field is close to the diffraction limit at different temperatures and the system size is compact. Finally, it is proved that this uncooled infrared optical system can meet environmental requirements of airborne and missile application through the actual imaging experiment at high and low temperatures.
曲贺盟, 张新, 张继真, 王灵杰. 紧凑型无热化非制冷红外光学系统设计[J]. 光学学报, 2014, 34(5): 0522003. Qu Hemeng, Zhang Xin, Zhang Jizhen, Wang Lingjie. Design of Compact Athermalizing Uncooled Infrared Optical System[J]. Acta Optica Sinica, 2014, 34(5): 0522003.