摘要
针对折反式长波线阵红外传感器的探测距离远、大口径小焦比、无法凝视成像等结构特点与使用要求,提出了一种高精度、流程化、参量化的装调技术,首先保证主反射镜装调后的面型精度,利用准直光管与三坐标测量机严格量化控制主、次镜之间的光学间隔,然后通过波像差测试手段对主、次镜的相对倾斜与径向偏移进行调校;再利用基准转换的方法,保证主、次镜系统与中继镜组光轴一致;最后装配线阵探测器,利用周扫工装反射镜,进行像面与光轴的调校。文中介绍了装调过程中采用的非球面激光定心、微应力粘接装配、中空主次镜光学间隔调校、中继镜"逐片"定心、线阵探测器周视装调等关键技术,结果表明:运用该技术装调后,探测器MDTD可达到4 K,外场探测距离可达60 km以上,满足设计指标要求。
A high-accuracy, standardize alignment technology is brought up, to adapt to the features and requirements of catadioptric linear array LWIR sensor, which are far-reaching, small F-number, and unable to staring imaged. The technique guarantees the accuracy of surface after alignment in the first place by using collimator and CMM which strictly controls the optical interval between the primary and secondary mirror, and then introduces wave front aberration measurement to adjust the tilt-errors and shift-errors of the primary and secondary mirror. After that, the method of reference conversion is adopted to line up the optical axis of the primary and secondary mirror and relay lens. At last, a linear detector is adopted to make adjustments to image and optical axis by using mirror. The paper introduces the key techniques in the alignment process such as centering by laser, microstress bond, alignment of the optical interval between the primary and secondary mirror, alignment for each lens, linear detector alignment etc. The results indicate that by introducing these technologies, the MDTD of the sensors can reach as high as 4 K, and the outdoor detection distance is more than 60 km. All the parameters meet design requirements.
出处
《光电工程》
CAS
CSCD
北大核心
2016年第5期82-87,共6页
Opto-Electronic Engineering
关键词
装调
红外传感器
波像差
光学间隔
中心偏差
alignment
infrared sensor
wave front aberration
optical interval
centering errors
