Chinese Journal of Lasers, Volume. 51, Issue 13, 1304007(2024)
Design and Experimental Verification of Thermal Stability for Micro Star Sensors
Figures & Tables(11)
Fig. 2. Installation diagram of stability test system and star sensor. (a) Thermal stability test system; (b) installation diagram of temperature measurement points and heating plates for star sensors
Fig. 5. Comparison of main frame and lens structure before and after optimization. (a) Original main frame bottom structure; (b) main frame bottom structure after optimization; (c) original main frame lens mounting surface; (d) main frame lens mounting surface after optimization; (e) original lens structure; (f) lens structure after optimization
Fig. 6. Outline drawing and temperature field distribution of baffle. (a) Outline drawing; (b) temperature field distribution simulation
Fig. 7. Variation of optical axis direction with bracket temperature. (a) Curve of right ascension changing with bracket temperature;
Fig. 8. Variation of optical axis direction with baffle temperature. (a) Curve of right ascension changing with baffle temperature;
Table 1. Key technical indicators of thermal stability test system
View tableTable 1. Key technical indicators of thermal stability test system
Device Key technical indicators Optical vacuum chamber Vacuum degree is better than 10-4 Pa；
heat sink range -20‒60 ℃；
uniformity of temperature field 99%
Precision bracket temperature control module Temperature measurement accuracy ±0.1 ℃；
temperature control accuracy ±0.3 ℃；
temperature control stability ±0.1 ℃
Baffle temperature control system Temperature measurement accuracy ±0.3 ℃；
temperature control accuracy ±1.0 ℃；
temperature control stability ±0.5 ℃
Star sensor Measurement accuracy 1″；
measurement stability ±0.1″
Data acquisition system Data acquisition； data fusion； playback
Table 2. Comparison of optical axis pointing offset under different structural statuses
View tableTable 2. Comparison of optical axis pointing offset under different structural statuses
Technical status Pointing offset Installation surface temperature
15 ℃ （±1 ℃）
Baffle temperature
30 ℃ （±10 ℃）
Magnesium alloy main frame 1.824 （X）
0.314 （Y）
0.0096 （X）
0.1850 （Y）
Silicon carbide main frame 1.326 （X）
0.176 （Y）
0.0150 （X）
0.1434 （Y）
Silicon carbide main frame+weight reduction slot filled 0.652 （X）
0.160 （Y）
0.1392 （X）
0.1728 （Y）
Silicon carbide main frame+weight reduction slot filled+
4 lens-mounting holes
0.090 （X）
0.182 （Y）
0.1466 （X）
0.1488 （Y）
Table 3. Comparison of optical axis pointing offset thermal stability results under different structural statuses
View tableTable 3. Comparison of optical axis pointing offset thermal stability results under different structural statuses
Technical status Pointing offset Notes Simulation result with installation surface temperature of （15±1） ℃ Thermal stability test result with installation surface temperature of 10‒30 ℃ Magnesium alloy main frame 1.824 （X）
0.314 （Y）
1.8508 （optical axis）
1.0299 （X）
-0.1400 （Y）
1.0394 （optical axis）
Original product status Silicon carbide main frame 1.326 （X）
0.176 （Y）
1.3376 （optical axis）
‒ Only simulation， non production and testing Silicon carbide main frame+weight reduction slot filled 0.652 （X）
0.160 （Y）
0.6713 （optical axis）
‒ Only simulation， non production and testing Silicon carbide main frame+weight reduction slot filled+4 lens-mounting holes 0.090 （X）
0.182 （Y）
0.2030 （optical axis）
-0.1195 （X）
0.1203 （Y）
0.1695 （optical axis）
Product status after optimized design
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Yanqing Wang, Weifeng Du, Yongkang Wu, Zhengyi Zhai, Zhongjia Zhu, Zhaohui Cao. Design and Experimental Verification of Thermal Stability for Micro Star Sensors[J]. Chinese Journal of Lasers, 2024, 51(13): 1304007
Paper Information
Category: Measurement and metrology
Received: Aug. 25, 2023
Accepted: Nov. 6, 2023
Published Online: Jul. 2, 2024
The Author Email: Yanqing Wang (wangyanqing803@aliyun.com)
CSTR:32183.14.CJL231140
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