Introduction to key techniques of multiple beam Fourier telescopy
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摘要:为了实现对远距离暗弱快速运动目标的高分辨率成像,基于多光束傅里叶望远镜的组成,对光学分系统、机械分系统、电子分系统和软件分系统涉及的关键技术进行了分析和讨论。针对光学分系统主要分析了 光源、相位延迟器,声光移频器和光电倍增管所涉及的主要技术指标;机械分系统讨论了发射望远镜指示和跟踪精度、发射光束的快速切换和主镜的拼接支撑结构等;电子分系统介绍了同步控制、电磁屏蔽和配电等需要注意的问题;而针对软件分系统则讨论了光束快速切换、位置和角度变化的同步控制和图像恢复等。对上述关键技术的分析和讨论为多光束傅里叶望远镜系统的研制提供了参考。Abstract:To implement the high resolution imaging of a fast motion target in a longer distance, the key techniques of a multi-beam Fourier telescopy are preliminarily analyzed in this paper. On the basis of the system composition, the key techniques in optical sub-system, mechanical sub-system, electrical sub-system and software sub-system are discussed separately. In optical subsystem, the key techniques are focused on the main specifications of laser sources, phase detection elements, acousto-optic frequency shifters and opto-electric tubes; and in mechanical sub-system, it is pointed out that the directing and tracking of the telescopy, fast-switch of beams and supporting structure of primary mirror should be paid more attention. Furthermore, the electrical sub-system emphasizes the synchronization control, electromagnetic shielding and power distribution and the software subsystem lays the stress on the fast switch of beams, synchronization of changing of locations and angles and image restoration. The analysis and discuss in this paper will be provide a reference for the design of multi-beam Fourier telescopy.
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Key words:
- multiple beam Fourier telescopy/
- active imaging/
- phase closure
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