Thermal and mechanical design and test of the CCD mount for the WEAVE spectrograph cryostats
Thermal and mechanical design and test of the CCD mount for the WEAVE spectrograph cryostats
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WEAVE 摄谱仪低温恒温器 CCD 安装座的热学和机械设计及测试
DOI：
10.1117/12.2312496
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Elswijk E
中科院分区：
文献类型：
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作者：
Elswijk E
WEAVE 是拉帕尔马岛威廉·赫歇尔望远镜的新型多目标光谱仪。主焦点、大量光纤和宽分辨率范围的巅峰需要严格的光学设计，这反过来又要求光谱仪具有严格的位置公差和大的最终焦平面。为了捕获该焦平面，两个低温恒温器均安装了两个 e2v 6k × 6k CCD 作为马赛克。除了通过液氮冷却至 150K 外，敏感区域的位置公差为整个图像区域的平面度 60μm p-v，绕 X 和 Y 轴旋转 ±50 弧分，X、Y 和 Z 方向平移 ± 50 微米。我们使用安装在两个 Thorlab 平移台上的 Stil 共焦测量头来创建 X、Y 安装座，由 Raspberry Pi 控制，能够记录 Z 轴测量，精度优于 1μm。用于测量真空下图像区域的平整度和变形，以及冷却至 150K 时图像平面的整体倾斜度和倾斜度，以确保它们符合规格且可重复。除了该测量系统之外，我们还使用配备 Navitar 50mm 镜头的 Thorlabs CMOS 相机，以确保每个 CCD 图像区域在 X 和 Y 平移方面均符合规格。为了满足上述要求，我们将 CCD 安装座设计为可调节（在初始设置时）、正确约束、隔离液氮蒸发振动以及隔热。
WEAVE is the new multi-object spectrograph for the William Herschel Telescope on La Palma. The culmination of prime focus, the large number of fibers and the wide resolution range has required a stringent optical design, which in turn demands a spectrograph with tight positional tolerances and large final focal plane. To capture this focal plane each of the two cryostats has two e2v 6k × 6k CCDs mounted as a mosaic. As well as being cooled to 150K via liquid nitrogen, the positional tolerances for the sensitive areas are flatness 60μm p-v over the entire image area, rotation around X and Y axis ±50 arcmin, translation in X, Y and Z ± 50 micron. We have used a Stil confocal measuring head mounted on two Thorlab translation stages to create a X,Y mount, controlled by a Raspberry Pi that is capable of recording measurements in Z to better than 1μm accuracy. This is used to measure the flatness and deformation of the image area under vacuum, and when cooled to 150K and the overall tip and tilt of the image plane to ensure they meet specification and are repeatable. In addition to this measuring system, we use a Thorlabs CMOS camera with a Navitar 50mm lens to ensure each CCDs image area is within specification with regards X and Y translation. In order to satisfy the above requirements, we designed the CCD mount to be adjustable (on initial setup), correctly constrained, isolated from liquid nitrogen boil-off vibration, and thermally insulating.
WEAVE光谱仪的设计
DOI：
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发表时间：
2014
期刊：
Astronomical Telescopes and Instrumentation
影响因子：
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作者：
K. Rogers;R. Stuik;I. Steele;J. Pragt;K. Middleton;S. Bates;J. Kragt;N. Tromp;D. Lesman;É. Lhomé;G. Dalton;S. Trager;R. Navarro;D. Abrams;I. Tosh;A. Jaskó;Carlos Martín;N. O'Mahony;S. Picó;Diego Cano Infantes;A. Bianco;J. Delgado;L. Rodríguez
通讯作者：
L. Rodríguez
DOI：
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发表时间：
1956
期刊：
影响因子：
--
作者：
H. Leuenberger;R. Person
通讯作者：
R. Person