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首页> 外文会议>New Developments in Optomechanics; Proceedings of SPIE-The International Society for Optical Engineering; vol.6665 >Performance Evaluations of the ATST Secondary Mirror
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Performance Evaluations of the ATST Secondary Mirror

机译：ATST辅助镜的性能评估

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摘要

The Advanced Technology Solar Telescope (ATST) has a 4.24m off-axis primary mirror designed to deliver diffraction-limited images of the sun. Its baseline secondary mirror (M2) design uses a 0.65m diameter Silicon Carbide mirror mounted kinematically by a bi-pod flexure mechanism at three equally spaced locations. Unlike other common telescopes, the ATST M2 is to be exposed to a significant solar heat loading. A thermal management system will be developed to accommodate the solar loading and minimize "mirror seeing effect" by controlling the temperature difference between the M2 optical surface and the ambient air at the site. Thermo-elastic analyses for steady state thermal behaviors of the ATST secondary mirror was performed using finite element analysis by I-DEAS~TM and PCFRINGE~TM for the optical analysis. We examined extensive heat transfer simulation cases and their results are discussed. The goal of this study is to evaluate the optical performances of M2 using thermal models and mechanical models. Thermal responses from the models enable us to manipulate time dependent thermal loadings to synthesize the operational environment for the design and development of TMS.
机译：先进技术太阳望远镜（ATST）具有一个4.24m的离轴主镜，旨在提供太阳的衍射极限图像。它的基线辅助反射镜（M2）设计使用直径为0.65m的碳化硅反射镜，通过双脚架挠性机构在运动学上安装在三个等距位置。与其他普通望远镜不同，ATST M2将承受大量的太阳热负荷。将开发一种热管理系统，以通过控制M2光学表面与现场环境空气之间的温差来适应太阳能负载并最大程度地减少“镜见效应”。使用I-DEAS〜TM和PCFRINGE〜TM的有限元分析对ATST副镜的稳态热行为进行热弹性分析，以进行光学分析。我们研究了广泛的传热模拟案例，并讨论了其结果。这项研究的目的是使用热模型和机械模型来评估M2的光学性能。这些模型的热响应使我们能够操纵与时间有关的热负荷，从而为TMS的设计和开发综合操作环境。

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