摘要
提出傅里叶望远镜外场成像实验的光学系统组成,详细介绍光学系统的装调和检测过程,并对模拟目标进行成像实验。采用3束不同频率的激光照射模拟目标并在目标表面形成干涉条纹,利用拼接主镜接收散射回波能量,再经次镜汇聚,最后进入压缩透镜组被光电倍增管探测。实验结果表明:主镜支撑结构稳定性优于0.075mrad,子镜指向调整精度优于0.05mrad,对安装的61块子镜进行共焦试验,光斑质心重合精度小于20mm。最后,对3mm的模拟目标进行外场成像实验,结果表明:室外环境下傅里叶望远镜的成像效果与实验室内成像效果及计算机仿真结果吻合较好,为后续反射模拟目标的成像提供了参考。
Optical system component of Fourier telescope field imaging experiment system was proposed,optical alignment and test progress were introduced particularly,and imaging experiments for simulation target were carried out.The simulation target was irradiated by laser beams with 3 different frequencies and interference fringes were formed on it.Then the scattering echo energy was received by the segmented primary mirror,and collected by the secondary mirror again,finally come into the compress lens group and was detected by photomultiplier.The experiment result indicates that the stability of support truss excels 0.075 mrad and the angle adjustment accuracy excels 0.05 mrad.The co-focus experiment for the assembled 61 segmented mirrors indicates that the superposition accuracy of the spots＇ centers of mass is less than 20 mm.The results of field imaging experiment for 3mm simulation target show that the field imaging effect is well consistent with the laboratory and PC emulations.The results provide references for the subsequent experiments of reflected simulation target.
出处
《应用光学》
CAS
CSCD
北大核心
2012年第3期480-484,共5页
Journal of Applied Optics
基金
国家863计划(2010AAXXX4250)
关键词
傅里叶望远镜
拼接主镜
光学系统装调
外场成像
Fourier telescope
segmented mirror
optical system alignment
field imaging
