Thermal design and verification of the large-temperature-difference space optical system
| Autor: | Liheng Chen, Zhengtao Zhang, Qingwen Wu, Hua-Bin Yang, Fei Shen |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
010504 meteorology & atmospheric sciences business.industry 020209 energy Thermal resistance Detector 02 engineering and technology 01 natural sciences Stability (probability) Finite element method Light intensity Optics Degree Celsius Filter (video) Thermal 0202 electrical engineering electronic engineering information engineering business 0105 earth and related environmental sciences |
| Zdroj: | 2017 IEEE International Conference on Mechatronics and Automation (ICMA). |
| Popis: | The Wide-field Aurora Imaging Camera (WAIC) with a large-temperature-difference (LTD) optical system is to provide an opportunity to obtain the light intensity map of the aurora. And thus an appropriate thermal design for the compact LTD space optical system is necessary. Depending on the character of the optics, several optical components temperature indexes were achieved. The temperature level of the BaF 2 filter should be high at 107–140 degree Celsius, but the best temperature of the mirrors is just at 20–40 degree Celsius. These present a challenging thermal control problem. We introduced thermal design for all optical components in details. Especially, the thermal design for the high temperature BaF 2 filter took the great thermal resistance design approach to maintain the BaF 2 filter within allowable temperature limits and minimize the influence on the temperature of the other optics. Subsequently, the camera finite element thermal model was established and the thermal test was also carried on. The results indicated that under the cold and hot extreme cases the filter average temperature could reach 106.5 degree Celsius and 139.0 degree Celsius, the control temperature precision was less than 2.5 degree Celsius and the temperature stability was less than 1.5 degree Celsius/2min. The temperature index of the mirrors and detector window also could be satisfied. Thermal design of the LTD space optical system with a large temperature difference is feasible and reasonable. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|