傅里叶望远镜大气湍流模拟实验

发布时间：2017-12-31 05:13

本文关键词：傅里叶望远镜大气湍流模拟实验　出处：《光子学报》2014年06期 　论文类型：期刊论文

【摘要】：傅里叶望远术是一种能对深空暗弱目标进行高分辨率成像的技术.为了验证大气湍流对傅里叶望远镜系统的影响,进行了实验室环境下大气湍流模拟实验研究.在三束光傅里叶望远镜实验系统上,通过控制射频驱动器的输出功率来模拟光强抖动,改变射频驱动器的瞬时频率来模拟相位抖动.给出了实验理论依据,推导了湍流强度与实验变量的关系.实验在弱湍流闪烁和相位抖动两种情况下,分别给单束光和三束光加随机扰动并计算其Strehl比.结果表明,只在单束光上加扰动时重建图像影响不大;在三束光上加扰动时,弱湍流光强抖动对傅里叶望远镜系统的成像效果影响具有较大的随机性,而相位抖动会严重影响系统成像质量.因此,消除光强抖动和相位抖动影响是图像重建算法改进应该考虑的一个关键因素.
[Abstract]:Fu Liye telescopy is a kind of high resolution imaging of dim and deep space target technology. In order to validate the effect of atmospheric turbulence on the Fu Liye telescope system, experimental study of atmospheric turbulence simulation laboratory environment is carried out. In the three beam Fu Liye telescope experiment system, by controlling the output power of the RF driver to simulate the instantaneous intensity jitter. Change in frequency of RF driver to simulate phase jitter. Gives the experimental theoretical basis, deduces the relation between the turbulent intensity and experimental variables. Experiments in weak turbulence scintillation and phase jitter of two cases, respectively for single beam and three beams with random disturbances and calculate Strehl ratio. The results show that the reconstructed image has little effect only in a single beam with disturbance; in the three light beams with disturbance, affect the imaging effect weak turbulent optical strong jitter on the Fu Liye telescope system with large Randomness and phase jitter will seriously affect the imaging quality of the system. Therefore, eliminating the influence of intensity jitter and phase jitter is a key factor to improve the image reconstruction algorithm.

【作者单位】：中国科学院西安光学精密机械研究所;中国科学院大学;
【基金】：总装备部重大研究项目(No.7131130)资助
【分类号】：TH743
【正文快照】： 0引言傅里叶望远术(Fourier Telescopy,FT)是一种高分辨率激光干涉主动成像技术.它通过发射多束带有一定频差的激光,实现多组干涉条纹对目标的扫描,接收到的调制返回信号中包含了目标图像的空间频谱信息,经过傅里叶反变换后可重建出目标图像.1996年RB Holmes[1]等人在JOSA上首

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