光学
望远镜
物理
辐射
反射望远镜
抛物面反射器
反射器(摄影)
有源光学
卡塞格伦反射镜
曲面镜
X射线望远镜
红外线的
光源
作者
shan huang,Lingxue Wang,Xu Hu,Shouzhang Yuan,Fangyu Xu,Jinsong Zhao,Yi Cai
出处
期刊:Optics Express
[The Optical Society]
日期:2023-06-12
卷期号:31 (13): 21521-21521
摘要
Non-contact temperature measurement for a solar telescope mirror is critical for improving the mirror seeing and thermal deformation of solar telescopes, a long-standing challenge in astronomy. This challenge arises from the telescope mirror's inherent weak thermal radiation, often overwhelmed by reflected background radiations due to its high reflectivity. In this work, an infrared mirror thermometer (IMT) is equipped with a thermally-modulated reflector, and a measurement method based on an equation for extracting mirror radiation (EEMR) has been developed for probing the accurate radiation and temperature of the telescope mirror. Using this approach, we can extract the mirror radiation from the instrumental background radiation via the EEMR. This reflector has been designed to amplify the mirror radiation signal incident on the infrared sensor of IMT, while inhibiting the radiation noise from the ambient environment. In addition, we also propose a set of evaluation methods for IMT performance based on EEMR. The results reveal that the temperature measurement accuracy of IMT to the solar telescope mirror using this measurement method can be achieved better than ±0.15°C.
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