红外技术2025，Vol.47Issue(6)：704-711,8.
低成本轻小型双视场中波制冷无热化光学系统设计
Athermalization Design of a Low-Cost Light-Small Dual-Field Medium-Wave Infrared Optical System
贺磊 1王仁浩 2司红利 2吴兴广 1于鹏亮1
作者信息
- 1. 哈尔滨新光光电科技股份有限公司,黑龙江哈尔滨 150080
- 2. 火箭军装备部驻哈尔滨地区军事代表室,黑龙江哈尔滨 150080
- 折叠
摘要
Abstract
To meet the requirements for a low-cost,compact,dual-field,and wide-temperature-range medium-wave infrared(MWIR)seeker,a dual-field MWIR optical system was designed based on a 640×512 pixel detector with a pixel size of 15 μm.The system adopts a four-lens imaging configuration using silicon/germanium(Si/Ge)materials.To achieve dual-field switching and athermalization over a wide temperature range,a single-lens axially moving zoom structure was employed,incorporating a refractive/diffractive hybrid optical element and an aspherical surface.Prototype results show that the system operates in the 3.7-4.8 μm spectral band,with an F-number of 3.97 and focal lengths of 65 mm and 21.5 mm,offering a 3× optical zoom.The corresponding field of view ranges from 8.4°×6.7° to 25.1°×20.2° at 33 lp/mm.The on-axis modulation transfer function(MTF)is no less than 0.3,while the off-axis MTF at 0.7 field is no less than 0.22.The cold stop efficiency reaches 100％.The system maintains good imaging performance across a wide temperature range(-40℃ to+60℃)without significant Narcissus effects.The overall dimensions are no more than φ50 mm × 72 mm,and the total weight does not exceed 36 g.The system features a compact structure,ease of fabrication and alignment,high production yield,and strong feasibility for engineering implementation.Its performance metrics meet the requirements of practical applications.关键词
低成本/轻小型/无热化/双视场Key words
low-cost/light-small/athermalization/dual field分类
机械工程引用本文复制引用
贺磊,王仁浩,司红利,吴兴广,于鹏亮..低成本轻小型双视场中波制冷无热化光学系统设计[J].红外技术,2025,47(6):704-711,8.
