高稳定性三视场电视探测系统

High-stability three-field TV detection system

为了满足光电搜索跟踪瞄准装置电视探测系统对光轴稳定性和一致性的要求,对一种采用旋转式切换机构的三视场电视探测系统进行了研究。通过对系统指标的分析,选定了切入切出式视场切换的光学系统方案,明确了采用旋转式切换机构的结构形式。基于该思路设计了精密旋转轴系、强力钕磁铁以及高弹力的柱塞限位机构和具有自锁特点的蜗轮蜗杆驱动机构,给出了限位机构和驱动机构的选型计算过程和结果。提出了利用经纬仪配合十字分划板工装的光轴一致性装调方法。通过该设计和装调流程,最终实现了高稳定性的三视场电视探测系统。测试结果表明,系统中视场光轴稳定性不超过8″,三个视场的光轴一致性均在1个像元尺寸内,满足指标要求。实验室和外景试验效果表明,系统各个视场成像质量优良,探测距离远,可以满足使用要求。

To meet the strict requirements of stability and consistency of the optical axis for the current three-field TV detection system with a photoelectric search and tracking device,a three-field TV detection system with a rotary switching mechanism was studied. Through the analysis of the system indicators,an optical system for cut-in and cut-out field of view switching was selected,and the structure of the rotary switching mechanism was presented. Based on this,a precise rotating shafting,position-limit mechanism with a powerful neodymium magnet and a high elastic plunger,and worm drive mechanism with self-locking characteristics were designed. The selection process and results of the limit mechanism and the drive mechanism were given. A method of optical axis consistency adjustment with theodolite and cross-reticle was proposed. With this design and adjustment process,a high-stability three-field TV detection system was realized. The test results show that the stability of the optical axis of the M-FOV is less than 8",and the consistency of the optical axis of the three fields of view is within 1 pixel size,which meets the indicator requirements. The results of laboratory and outdoor experiments show that the imaging quality of each field of view of the system is excellent,and the detection range is long,which can meet the requirements of use.