多光纤密集排列精密定位方法研究

Accurate positioning scheme for close range of multi-optical-fiber

针对 L AMOST天文望远镜工程中分布在直径 1 .75 m圆焦面上的 40 0 0根光纤同时接收星光信号的要求 ,分析了国内外现有光纤定位方法的优缺点 ,根据杠杆的位移放大原理 ,提出了摆杆式并行平台光纤定位的方法 ,并对其进行了方案分析 ,该定位方法可以满足 L AMOST工程对光纤定位提出的各项指标要求 ,定位精度能达到± 0 .0 40 mm,为 L

LAMOST telescope needs 4000 optical fibers accurately positioned on focal surface of 1750mm diameter. The paper analyzed the strong points and shortcomings of the optical fiber positioning methods home and abroad. According to the principle of magnifying displacement with swing rod, the paper put forward the method of optical fibers positioning with parallel adjusting tables and swing rod, and designed the positioning structure of close range optical fibers in a small space. The analysis results make known, the structure can meet the needs of the every index to the optical fibers positioning for LAMOST telescope, the positioning precision can reach to ±0.04 mm, which supplies the basis of the choosing plan for LAMOST telescope.