论文标题
MICADO大气分散校正器：光力学设计，预期性能和校准技术
The MICADO Atmospheric Dispersion Corrector: Optomechanical design, expected performance and calibration techniques
论文作者
论文摘要
如果没有使用大气分散器校正器（ADC），则穿过大气的光的差异折射可能会对图像质量产生严重影响。对于极大的望远镜（ELT），这可以很好地融入红外线。 Micado是ELT的近红外成像摄像头，将采用一个低温ADC，该速度由两个反向旋转的Amici Prism组成，直径为125毫米。该机制将使大气分散剂降低至2.5毫米弧秒以下（MAS），设定的目标为1个。在本报告中，我们概述了Micado开发中ADC的当前状态。我们总结了光力学设计，并讨论了低温环境如何影响性能。我们还将讨论我们的计划，在仪器完全集成后，在冷瞳上使用衍射面具校准和验证性能。
The differential refraction of light passing through the atmosphere can have a severe impact on image quality if no atmospheric dispersion corrector (ADC) is used. For the Extremely Large Telescope (ELT) this holds true well into the infrared. MICADO, the near-infrared imaging camera for the ELT, will employ a cryogenic ADC consisting of two counter-rotating Amici prisms with diameters of 125 mm. The mechanism will reduce the atmospheric dispersion to below 2.5 milli arcseconds (mas), with a set goal of 1 mas. In this report, we provide an overview of the current status of the ADC in development for MICADO. We summarise the optomechanical design and discuss how the cryogenic environment impacts the performance. We will also discuss our plan to use a diffraction mask in the cold pupil to calibrate and validate the performance once the instrument is fully integrated.
