Echidna: a multifiber positioner for the Subaru prime focus
Echidna: a multifiber positioner for the Subaru prime focus
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Echidna：用于斯巴鲁 prime focus 的多纤维定位器
DOI：
10.1117/12.395458
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
V. Klocke
中科院分区：
文献类型：
--
作者：
P. Gillingham;S. Miziarski;M. Akiyama;V. Klocke
Subaru Prime Focus的摄谱仪的目标是拥有400根光纤。由于磁场的范围仅为英澳望远镜400光纤2度磁场系统的1/10左右，因此由机器人放置磁性按钮（如2df）被认为不适用。相反，已经开发了一种概念，其中每根光纤都固定在脊柱上，脊柱可以倾斜以将其尖端定位在圆内的任何位置。由于目标随机地散布在整个场上，并且每个脊柱的径向范围等于脊柱节距，因此到达目标的成功率是可接受的高。在f/2焦距下，1/20弧度的脊倾斜是可以接受的，并且要求脊长140 mm。两个基本的机制，倾斜和保持这样的脊柱已经实验研究。第一个使用三个商业微型线性致动器设置平行，并通过简单的弯曲连接到脊柱的基础。已经建造了一个原型，并证明其性能令人满意。另一种方法是将脊柱安装在球形关节上，并使用弯曲压电冲击驱动器直接驱动脊柱倾斜。这种形式的原型已经建成，初步测试是有希望的。
The aim for a spectrograph feed from the Subaru prime focus is to have 400 fibers. Since the are of the field is only approximately 1/10 that of the 400 fiber two degree field system on the Anglo-Australian Telescope, placement of magnetic buttons by a robot, as done for 2df, was not considered applicable. Instead, a concept has been developed in which each fiber is held on a spine which can be tilted to position its tip anywhere within a circle. With targets randomly scattered over the field and the radial range for each spine equal to the spine pitch, the success rate in reaching targets is acceptably high. At the f/2 focus, a spine tilt of 1/20 radian is just acceptable and requires the spines be 140 mm long. Two basic mechanisms for tilting and holding such a spine have been investigated experimentally. The first uses three commercial miniature linear actuators set parallel and linked to the base of the spine through simple flexures. A prototype has been built and demonstrated to perform satisfactorily. Another approach is to mount the spine ona ball joint and drive it directly in tip and tilt using a bending piezo impact drive. A prototype of this from has been built; initial test are promising.