基于杠杆放大原理的红外消热差机构设计  

Design of An Athermalized Infrared Mechanism Based on Lever Amplification Principle

作　　者：周运义[1] 熊涛[1] ZHOU Yun-yi;XIONG Tao(Huazhong Institute of Electro-Optics—Wuhan National Laboratory for Optoelectronics,Wuhan 430223,China)

机构地区：[1]华中光电技术研究所-武汉光电国家研究中心,湖北武汉430223

出　　处：《光学与光电技术》2021年第2期93-97,共5页Optics & Optoelectronic Technology

摘　　要：温度变化会导致红外镜头成像质量恶化,为消除温度变化的影响,提出了基于杠杆放大原理的红外消热差机构方案。利用杠杆原理,将不同金属线胀量的差值放大后再推动消热透镜对红外光学系统进行补偿,从而保持光学性能的稳定。介绍了这种消热差机构的设计方案、关键设计及某导引头的红外实例应用。在-45~+60℃变化范围内,该实例在消热差之前像面漂移量为0.717,消热差之后像面漂移量为0。这种机构为红外消热差技术增加了一个新的途径。Because of the temperature changing,the image quality of IR cameras becomes worse. In order to prevent temperature-influence,a new mechanism of temperature-influence prevention is provided in this paper. It is based on lever principle to amplify the D-vale of different metals’ swelling value,and drive the lens to prevent the temperature-influence for IR optical system. The design programme,the parts’ key-design technology,and the design example of a guidance head are introdued. From -45~+60 ℃,the example’s drift value is 0.717,but it becomes 0 after temperature-influence is prevented. The experiments show that it is a new way for infrared athermalization.

关 键 词：红外光学系统 温度变化 杠杆原理 消热差 机构设计 

分 类 号：TN216[电子电信—物理电子学]