Mounting large lenses in wide-field instruments for the converted MMT
Mounting large lenses in wide-field instruments for the converted MMT
复制标题
在宽视场仪器中安装大镜头以用于转换后的 MMT
DOI：
10.1117/12.316812
复制
发表时间：
1998
影响因子：
2.1
通讯作者：
D. Fabricant
中科院分区：
文献类型：
--
作者：
R. Fata;D. Fabricant
我们描述了我们已经用于将大型光学器件安装在用于转换的MMT的三个宽视场仪器中的技术：宽视场校正器用于在转换的MMT的f/5焦点处提供1度直径的视场，由300根光纤馈送的Hectospec台式光谱仪和宽视场双光束Binospec光谱仪。这些光学器件主要是折射元件，直径在0.2和0.8米之间，必须从它们的边缘安装，尽管我们也描述了Hectospec台式光谱仪中两个大镜子的安装。宽视场校正器和Binospec支架都必须在不同的重力载荷下工作：校正器固定在转换后的MMT的主镜单元上，并从天顶倾斜到地平线，而Binospec安装在转换后的MMT的卡塞格伦焦点上。此外，两种仪器的光学支架必须符合严格的空间限制。Hectospec摄谱仪安装在MMT的旋转建筑物中，并经历恒定的重力矢量。在所有情况下，底座必须在-20至20摄氏度的宽温度范围内工作，因此必须仔细考虑底座和光学器件之间的差异热膨胀问题。因此，我们讨论的安装包括RTV弹性体或弯曲元件。
We describe the techniques that we have used to mount large optics in three wide-field instruments for the converted MMT: the wide-field corrector uses to provide a 1 degree diameter field at the f/5 focus of the converted MMT, the Hectospec bench spectrograph fed by 300 optical fibers and the wide- field dual-beam Binospec spectrograph. These optics are primarily refractive elements with diameters between 0.2 and 0.8 m that must be mounted from their edges, although we also describe mounts for two large mirrors in the Hectospec bench spectrograph. Both the wide-field corrector and Binospec mounts must perform under varying gravity loads: the corrector is fixed to the converted MMT's primary mirror cell and is tilted from zenith to horizon while Binospec is mounted at the converted MMT's Cassegrain focus. Furthermore, the optics mounts for both instruments must fit within tight space constraints. The Hectospec spectrograph is mounted in the MMT's rotating building and experiences a constant gravity vector. In all cases, the mounts must perform over a wide temperature range, -20 to 20 degrees Celsius, so the issue of differential thermal expansion between the mounts and optics must be carefully considered. As a result, the mounts we discuss include either RTV elastomeric or flexural elements.