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傅里叶望远镜成像技术,综合了激光主动成像技术、光学合成孔径技术和相位闭合技术是一种新的高分辨率成像探测技术。激光频移的效果是影响傅里叶望远镜成像质量的重要因素,特别是使用大功率、宽光束和宽调制带宽激光的系统。构建了不同的误差模型,推导了频移误差在系统中的传递函数,利用仿真实验分析其对系统成像的影响,得到了对应的误差影响分析。结果表明,频移精度和稳定度严重影响到系统的成像效果,部分情况下含有误差的反演图像与理论反演图像的施特雷尔值已降到0.2,因此合理的设计和选择声光频移器是改善系统成像的一个关键因素。
Fourier telescope imaging technology, a combination of laser active imaging technology, optical synthetic aperture technology and phase closure technology is a new high-resolution imaging detection technology. The effect of laser frequency shift is an important factor affecting the imaging quality of Fourier telescopes, especially systems that use high power, wide beams and wide bandwidth modulated lasers. Different error models are constructed, and the transfer function of frequency-shift errors in the system is deduced. The influence of imaging errors on system imaging is analyzed by simulation experiments, and the corresponding error analysis is obtained. The results show that the accuracy and stability of the frequency shift seriously affect the imaging performance of the system. In some cases, the error of the inversed image and the theoretical inversion image have been reduced to Strain values of 0.2. Therefore, reasonable design and selection of acousto-optic Frequency shifters are a key factor in improving system imaging.