自聚焦透镜阵列在空间交会对接中的应用

Application of Grin Lens Arrays in Spatial Rendezvous and Docking

在近距(150m^1.5m)空间交会对接中,CCD光学成像敏感器承担测量任务,CCD像机在观测视场角内如何捕捉到目标是首要问题。研究了自聚焦透镜阵列作为合作目标匀化器的应用,简述了自聚焦透镜的成像基本原理。自聚焦透镜,作为合作目标的出光端,由于其成像的特殊性,我们研制出了自聚焦透镜阵列匀化器,解决了在0°~±30°的发散均匀性。在观测视场角内,各角度辐亮度与中心辐量度之比在10%左右,预期做到6%。目标光源辐亮度分布在0°~±30°范围内接近朗伯体。并给出了验证试验。

In spatial short-range （150m ～1.5m）Rendezvous and Docking, CCD optical sensor is main measuring device. At measuring field of view , how CCD camera catches the targets is principal problem. In this paper application of grin lens arrays as a cooperative targets uniform lens in spatial rendezvous and docking is studied. The basic imaging principle is briefly introduced. Because of their imaging particularity the grin lens as cooperative targets optical end are composed of circle and square uniform lens in order to solve 0°～±30°scattering uniformity. At measuring field of view , the ratio of all angle radiance to center radiance is about 10%, and would be 6%. The distribution of targets radiance is regarded as approximately Lambert （0°～±30°） . An experiment for validating is given.