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首页> 外文期刊>South African Journal of Geology: Being the Transaction of the Geological Society of South African: Syndie die Verhandelinge van die Geologiese Vereniging van Suid-Afrika >Optical configuration and optical tests of the HartRAO Lunar Laser Ranger
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Optical configuration and optical tests of the HartRAO Lunar Laser Ranger

机译：Hartrao Lunar激光游侠的光学配置和光学测试

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摘要

The telescope to be used for the HartRAO Lunar Laser Ranging system is a 1-m Classical Cassegrain donated by a French observatory called the Observatoire de la C?te d’Azur. Limited technical details of the telescope exist so tests were conducted to determine its optical characteristics and performance. The optical performance of the telescope was determined through its transmission efficiency. The optical efficiency of any telescope highly hinges on the reflectivity and surface accuracy of optics through which the laser signal is delivered. We present possible coudé paths and their respective components for beaming the laser signal from its source and through the telescope. Spectroscopic measurements of each of the coudé optics were conducted in order to determine the total throughput of the system. The surface accuracy of the primary mirror was validated by performing a structural analysis of the mirror under its support system. Taking into account the honeycomb geometry of the mirror, its material properties and support mechanism, a finite element analysis was done with ANSYS to predict the gravitational deformations the mirror will experience under operational angles. High optical performance telescopes require that deformations be kept to a small fraction of the wavelength of light the telescope is designed to use. A system efficiency of ~ 90% can be expected if obstructions and number of reflective surfaces are limited on the coudé path.
机译：用于Hartrao Lunar激光测距系统的望远镜是由一个称为Daviceatoire de la C的法国天文台捐赠的1米古典Cassegrain。存在有限的望远镜技术细节，以便进行测试以确定其光学特性和性能。通过其传输效率确定望远镜的光学性能。任何望远镜的光学效率高度铰链对激光信号通过该光学器件的反射率和表面精度进行高度铰接。我们提供了可能的Coudé路径及其各自的组件，用于将激光信号从其源和穿过望远镜。进行了每个Coudé光学器件的光谱测量，以确定系统的总吞吐量。通过在其支持系统下执行镜子的结构分析来验证主镜的表面精度。考虑到镜子的蜂窝几何形状，其材料特性和支持机构，用ANSYS进行有限元分析以预测镜子在操作角度下的重力变形。高光学性能望远镜要求使变形保持在望远镜设计用于使用的光波长的一小部分。如果障碍物和反射表面的数量限制在Coudé路径上，则可以预期〜90％的系统效率。

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