光学综合孔径望远镜阵的光束组合器

Beam Combiner in Optical Aperture Synthesis Telescope Array

光束组合器是光学综合孔径望远镜阵重要技术组成部分之一。从光束组合器所产生的光干涉条纹中提取中央条纹 (主峰 )相位和可见度信息 ,实现对望远镜状态、延迟线光程补偿与条纹跟踪 ,光束平行性伺服等进行精细馈控 ,从而高灵敏度、高效率地得到图像重构的闭合相位等数据 ,最后获取高分辨率的目标图像。

Beam combiner is the key part of optical aperture syntheiss telescope array. From the interferogram produced by beam combiner, the useful messages such as the central fringe phase and visibility can be extracted. With these messages, one can make it into reality to control the telescope status, compensate the path with delay lines, track fringes, beam parallel character feed back and fine control so as to get enough data used for closure phase calculating and image reconstruction. An initial result on the beam combiner for optical aperture synthesis telescope array is presented.