Xiao TANG, Baoyu YANG, Yinong WU, Chengdong SHAN, Jie LI, Yuhan LI. Method for low-temperature displacement measurement of complex opto-mechanical structure based on symmetrical laser displacement sensors[J]. Infrared and Laser Engineering, 2025, 54(5): 20240477
- Infrared and Laser Engineering
- Vol. 54, Issue 5, 20240477 (2025)
Fig. 1. Diagram of W shape radiant cooler
![Diagram of (a) system of measuring low temperature displacement (b) laser triangulation displacement sensor[9] (c) laser displacement sensor position and the coordinate system in the low temperature displacement measurement](/richHtml/irla/2025/54/5/20240477/img_2.jpg)
Fig. 2. Diagram of (a) system of measuring low temperature displacement (b) laser triangulation displacement sensor[9] (c) laser displacement sensor position and the coordinate system in the low temperature displacement measurement
Fig. 3. Photos of measuring system: (a) Mounting plates, sensors and multilayer insulation(MLI); (b) Radiant cooler and measuring system in the vacuum chamber
Fig. 4. Diagram of test results and (a) system error 1), (b) system error 2), and (c) system error 3)
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Table 1. The normal condition and low-temperature condition of the radiant cooler
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Table 2. Result of low-temperature displacement measurement in MWIR optical path of the radiant cooler (Unit: μm)
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