基于小口径和瞬时大视场激光制导**平台的要求, 提出了一种小型捷联折射式离焦光学探测系统方案。该方案根据捷联式激光半主动目标探测模型和理想离焦光学系统模型得到激光制导理想光学系统参数, 并以此参数为基础, 使用ZEMAX软件进行优化, 设计了工作波长为1 064 nm的离焦光学探测系统。该系统临界有效探测半视场为5.89°, 临界探测半视场为13°, 长径比为1.27, 较好地解决了整流罩引入的像差问题, 并且光斑重心位置与目标位置偏差角存在线性关系。验证实验结果表明该离焦光学探测系统误差小于0.15°, 满足大视场下目标位置偏差角探测的要求。

Based on the requirement of the laser guidance weapon platform with small caliber and large instantaneous field of view, the scheme of a small strapdown defocused refraction optical detection system was proposed. According to the target detection model of strapdown semi-active laser guidance and the ideal defocused optical system model, the optimal system parameters were obtained with the consideration of the application of laser guidance. Based on these parameters, ZEMAX was used to optimize the defocused optical detection system with the work wavelength of 1 064 nm. The critical effective detection half field of view of this system were 5.89 degrees, the critical detection half field of view were 13 degrees, and the length diameter ratio was 1.27. The aberration from the dome was solved well. The linear relationship between spot centroid position and target position deviation angle was presented. The experimental results show that the error of the designed optical defocused detection system is less than 0.15 degrees, meeting the requirement for target position deviation angle detection of large field of view.