激光与光电子学进展, 2013, 50 (1): 011102, 网络出版: 2012-10-25
多光束傅里叶望远镜的移频设计
Design of Laser Frequency Shift of Multiple-Beam Fourier Telescope
成像系统 傅里叶望远镜 声光移频器 imaging systems Fourier telescope Golomb ruler Golomb ruler acousto-optical device
摘要
多光束傅里叶望远镜(MFT)对运动的深空暗目标快速成像有着独特的优势，但光学、电学、机械、软件等未突破的关键技术制约着其发展。根据傅里叶望远镜的成像原理和戈洛姆法则(Golomb ruler)，分析选取了多光束成像下每束光的移频量，并设计了符合系统要求的声光移频器。结果表明，采用Golomb ruler时，31束光系统下的最大相对移频量为7.47 MHz，设计的声光移频器通光孔径为8 mm，全频带下最低衍射效率为0.9021，各指标都能满足系统需求。因此，多光束傅里叶望远镜的移频技术可行。
Abstract
Multiple-beam Fourier telescope (MFT) has a unique advantage for high-speed imaging of moving object which is small and dim in deep space, but the key technology on optics, electricity, machinery and software limite the development of MFT. The frequency shift of every laser is anslysed according to the principle of MFT and Golomb ruler, and a suitable acousto-optical device has been designed. As a result, with the help of Golomb ruler, the maximum of relative frequency shift is 7.47 MHz, under 31 lasers, the aperture of device is 8 mm, and the minimum of diffraction efficiency is 0.9021, the requirement of MTF can be satisfied with all these index. Therefore, the frequency shift technology of MTF is possible.
孔新新, 黄旻, 张文喜, 伍洲, 李杨, 周志盛. 多光束傅里叶望远镜的移频设计[J]. 激光与光电子学进展, 2013, 50(1): 011102. Kong Xinxin, Huang Min, Zhang Wenxi, Wu Zhou, Li Yang, Zhou Zhisheng. Design of Laser Frequency Shift of Multiple-Beam Fourier Telescope[J]. Laser & Optoelectronics Progress, 2013, 50(1): 011102.
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