摘要
基于红外目标模拟器的成像特点,以改进型柯克式系统为初始结构,设计一套大视场中波红外消热差光学系统;该光学系统视场30°,出瞳距300 mm,最大口径220 mm,焦距240 mm,基于光学被动消热差原理,采用一片非球面透镜,通过选择合适的玻璃及光焦度,设计的镜头在-40-60℃的环境下空间频率16 lp/mm时MTF优于0.4,有很好的热稳定性和成像质量,结构简单、加工方便,有很强的工程实用性。
Based on the imaging characteristics of the infrared target simulator, a wide field-of-view（ FOV）medium-wave infrared heat dissipation differential optical system was designed taking the improved Cooke type system as the initial structure. The optical system has an FOV of 30° , an exit pupil of 300 mm, an maximum diameter of 220 mm, and the focal length of 240 mm. Based on the principle of optical passive athermalization, a piece of aspheric lens is used. By choosing appropriate glass and focal power, the lens has an MTF superior to 0. 4 under the environment of- 40 - 60 ℃ at spatial frequency of 16 lp / mm, and also has good thermal stability and imaging quality, simple structure,and very strong practicability.
出处
《电光与控制》
北大核心
2015年第8期87-89,共3页
Electronics Optics & Control
关键词
红外目标
模拟器
光学设计
柯克物镜
消热差
infrared target
simulator
optical design
Cooke objective lens
athermalization
