光学 精密工程, 2010, 18 (3): 593, 网络出版: 2010-08-31   

主动补偿无热化技术在机载红外光学系统中的应用

Application of active-athermal compensation to airborne IR optical systems
作者单位
1 中国科学院 长春光学精密机械与物理研究所,吉林 长春 130033
2 中国科学院 研究生院,北京 100039
摘要
为了提高机载红外光学系统的环境适应性,分析了温度对光学系统的影响,比较了各种无热化补偿措施的优缺点。对提出的红外光学系统的结构形式、无热化补偿量进行了研究。首先,根据该系统无热化补偿的特点确定了主动无热化补偿的技术路线。接着,指出常规的凸轮-电位计检调焦机构无法满足要求,确定了以高精度步进电机为执行元件的方案。然后,针对该方法存在丢步的问题,引入线性霍尔元件作为位置反馈元件,采用局部拟合的方法实现了高精度无热化补偿。最后,介绍了该镜头的变倍及无热化补偿机构的实现方法。实验数据表明,此方案的补偿精度可以达到0.02 mm,实现了红外光学系统在全温度范围内MTF下降到0.05以内。该方法基本满足两档变倍红外光学系统在全温度范围内的性能要求。
Abstract
In order to improve the environmental adaptability of airborne infrared optical systems, the effects of ambiance temperature upon an IR optical system was analyzed, and several typical athermal compensation methods were compared.The optical layout and athermal compensation of the optical system were studied.Firstly, the active athermal compensation method was proposed based on the nonlinear speciality of the lens athermal compensation.Then, it pointed out that the normal cam-potentiometer method could not meet the demands, so the stepper motor with 0.006 mm was selected as a driver.Aim at the disadvantage of proposed method, a linear Hall sensor was introduced to be a position feedback component,and precision athermal compensation was realized by a partial fit method.Finally, the zoom and athermal compensation mechanical structures were discussed.Experimental results indicate that the method proposed can get 0.02 mm compensation precision, and the MTF attenuation of IR optical system is within 0.05,which satisfies the system requirement of athermal compensation in the full temperature range.

沈宏海, 王国华, 丁金伟, 王灵杰, 撖芃芃, 李永刚. 主动补偿无热化技术在机载红外光学系统中的应用[J]. 光学 精密工程, 2010, 18(3): 593. SHEN Hong-hai, WANG Guo-hua, DING Jin-wei, WANG Ling-jie, HAN Peng-peng, LI Yong-gang. Application of active-athermal compensation to airborne IR optical systems[J]. Optics and Precision Engineering, 2010, 18(3): 593.

本文已被 12 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!