双波段大变倍比连续共变焦光学系统设计

发布时间：2018-06-23 11:41

  本文选题：光学设计 + 双波段　； 参考：《光子学报》2016年10期

【摘要】：为了提高变焦光学系统在复杂环境下的高分辨率探测能力,解决现有多波段光学系统中光路转换和波段切换耗时长、系统反应慢、不同波段目标信息存在差异的问题,设计了一种可见光(0.38~0.76μm)、中红外(3~5μm)共口径连续共变焦光学系统,系统工作焦距为7.52~98.35mm,变焦比为13×.基于正组补偿变焦理论分析了任意变焦位置处可见光、中红外变焦比的差异及其变化规律,推导了三片薄透镜消色差理论和双波段焦距补偿表达式.对变倍组和补偿组的光焦度进行合理匹配,使系统在任意变焦位置处的焦距及变焦比都相同,提高了双波段目标信息的一致性.根据使用要求,采用光学被动式完成双波段光学系统在-40~+60℃温度范围内的消热差设计.设计结果表明,系统结构紧凑,反应速度快,整体成像质量良好,可实现昼夜全天候工作.
[Abstract]:In order to improve the high resolution detection ability of zoom optical system in complex environment, the problems of long time consumption of optical path conversion and band switching, slow system response and difference of target information in different bands are solved in existing multi-band optical systems. A continuous confocal optical system of visible light (0.38 ~ 0.76 渭 m),) was designed. The working focal length of the system is 7.52 ~ (98.35) mm and the zoom ratio is 13 脳. Based on the positive group compensation zoom theory, the difference between visible and middle infrared zoom ratio at any zoom position and its variation law are analyzed. The theory of achromatic aberration of three thin lenses and the double band focal length compensation expression are derived. In order to make the system have the same focal length and zoom ratio at any zoom position, the system can improve the consistency of the information of the dual-band target by the reasonable matching of the optical focus of the variable magnification group and the compensation group, so as to make the focal length and zoom ratio of the system at any zoom position the same. According to the requirements of application, the design of heat dissipation difference between -40 鈩，

本文编号：2057005