论文标题
局部湍流对高阶自适应光学的影响
Impact of local turbulence on high-order adaptive optics
论文作者
论文摘要
我们提出了一个实验，该实验旨在解决旨在避免望远镜内部局部湍流的标准规范。也就是说，每个光学表面应保持在1.5 $^\环境温度周围的1.5 $^\ CIRC范围内。在为天文学开发光学系统时，这种规范代表了一个重要的问题和约束。我们的目的是在VLTI/NAOMI和VLTI/GREATITY+自适应光学的情况下测试其关键性。该实验是使用重力+的未来纠正光学（CO）的硬件进行的。进行了光学测量，以观察平面镜前的湍流演变，该镜像的表面温度在$ 22^\ Circ $以上的范围高于环境温度的范围内。对湍流进行了时间依赖性分析，并进行了空间分析。该实验显示温度对局部湍流没有影响。但是，应该注意的是，该结果仅适用于本文中描述的非常具体的几何形状，该几何形状代表了位于Coudé火车内部的自适应光学器件（AO）系统（面向下方的镜子在后面加热）。
We present an experiment set to address a standard specification aiming at avoiding local turbulence inside the Coudé train of telescopes. Namely, every optical surface should be kept within a 1.5$^\circ$ range around ambient temperature. Such a specification represents an important concern and constraint when developing optical systems for astronomy. Our aim was to test its criticality in the context of the development of the VLTI/NAOMI and VLTI/GRAVITY+ adaptive optics. This experiment has been conducted using the hardware of the future Corrective Optics (CO) of GRAVITY+. Optical measurements were performed in order to observe the evolution of turbulence in front of a flat mirror for which the surface temperature was controlled in a range of $22^\circ$ above ambient temperature. A time-dependent analysis of the turbulence was led along with a spatial analysis. This experiment shows no influence of temperature on local turbulence. It should be noted however that this result is only applicable to the very specific geometry described in this paper, which is representative of an adaptive optics (AO) system located inside the Coudé train (facing-down mirror heated on its backface).
