Spine development for the Echidna fiber positioner
Spine development for the Echidna fiber positioner
复制标题
Echidna 纤维定位器的脊柱开发
DOI：
10.1117/12.462333
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
M. Akiyama
中科院分区：
文献类型：
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作者：
A. Moore;P. Gillingham;Jason S. Griesbach;M. Akiyama
Echidna多目标光纤定位器是斯巴鲁望远镜主要焦点光纤多目标光谱仪（FMOS）项目的一部分。考虑到焦平面的物理尺寸和所需的光纤数量（400），基于英澳天文台的2dF仪器的定位系统，包括由单个X/Y/Z机器人放置磁性按钮，被认为是不切实际的。相反，已经开发了一种解决方案，其中每个光纤安装在倾斜的脊柱上，允许光纤定位在半径为7 mm的圆中的任何位置。因此，400根光纤中的每一根在视场中具有固定的“巡逻”区域，相邻脊柱之间具有显著的重叠。描述了一个单一的针刺。每个脊柱都由象限管压电致动器（QTP）驱动，该致动器通过棘轮机构能够将光纤定位到相应巡逻区域中任何坐标的10 μm范围内。20个原型脊柱中有8个的定位测试结果显示，其性能优于规范，并且耐用性远远超过仪器的规定寿命。
The Echidna multi-object fiber positioner is part of the Fiber Multi-Object Spectrograph (FMOS) project for the prime focus of the Subaru telescope. Given the physical size of the focal plane and the required number of fibers (400), a positioning system based on the Anglo-Australian Observatory's 2dF instrument, that incorporates the placement of magnetic buttons by a single X/Y/Z robot, was considered impractical. Instead, a solution has been developed in which each fiber is mounted on a tilting spine that allows the fiber to be positioned anywhere in a circle of radius 7 mm. Each of the 400 fibers therefore has a fixed "patrol" area in the field of view, with a significant overlap between neighboring spines. A description of a single Echidna spine is presented. Each spine is driven by a quadrant tube piezoelectric actuator (QTP) that, by a ratcheting mechanism, is able to position the fiber to within 10 μm of any coordinate in the corresponding patrol area. Results of positioning tests for eight of the twenty prototype spines reveal better than specification performance, as well as a durability far in excess of the specified lifetime of the instrument.