Final optical design for the WEAVE two-degree prime focus corrector
Final optical design for the WEAVE two-degree prime focus corrector
复制标题
WEAVE 二度定焦校正器的最终光学设计
DOI：
10.1117/12.2055306
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发表时间：
2014
影响因子：
3.3
通讯作者：
S. Trager
中科院分区：
文献类型：
--
作者：
T. Agócs;D. Abrams;É. Lhomé;K. Dee;G. Dalton;K. Middleton;P. Bonifacio;J. Aguerri;S. Trager
Weave是西班牙加那利群岛拉帕尔马的威廉·赫歇尔望远镜(WHT)的下一代广域光学光谱设备。我们给出了优化编织的WHT的二度主聚焦校正器(PFC)的最终光学设计。标称的光学设计提供了在370到1000 nm的波长范围内不超过0.6角秒(80%环绕能量直径)的多色PSF，覆盖了最大65度的天顶角的2度视场(FOV)。我们描述了在最终设计评审(FDR)之前必须解决的光学问题，并提出了在可制造性和性能之间进行必要的权衡。我们详细介绍了深度蒙特卡罗模拟的结果，该模拟包含了影响Prime Focus校正器PSF误差预算的所有制造、对准和稳定性问题。作为关于系统不同容差的多次迭代的结果，包括所有误差的多色PSF(80%环绕能量直径)保持在所需的1角秒以下。
WEAVE is the next-generation wide-field optical spectroscopy facility for the William Herschel Telescope (WHT) in La Palma, Canary Islands, Spain. We present the final optical design for the two-degree Prime Focus Corrector (PFC) for the WHT optimised for WEAVE. The nominal optical design provides a polychromatic PSF that does not exceed 0.6 arcsec (80% encircled energy diameter) over a wavelength range from 370 to 1000 nm covering a two-degree field-of-view (FOV) for zenith angles up to 65 degrees. We describe the optical issues that had to be addressed prior to the Final Design Review (FDR) and present the trade-offs that were necessary between manufacturability and performance. We detail the results of an in-depth Monte Carlo simulation that contains all the manufacturing, alignment and stability issues that affect the PSF error budget of the Prime Focus Corrector. As a result of multiple iterations regarding the different tolerances of the system, the polychromatic PSF (80% encircled energy diameter) including all errors stays below the required 1 arcsec.