热膨胀
超声波传感器
材料科学
光学
反射系数
沉浸式(数学)
声学
复合材料
数学
物理
纯数学
作者
Wen-Qing Wei,Qi Xue,Deng Hu,Liping Shang,Yuanyuan Zhang,Hong Liu
出处
期刊:Applied Optics
[Optica Publishing Group]
日期:2023-04-04
卷期号:62 (13): 3347-3347
摘要
The coefficient of thermal expansion (CTE) of ultra-low-expansion (ULE) glass is critical to the development of precision optical systems. Herein, an ultrasonic immersion pulse-reflection method is proposed to characterize the CTE of ULE glass. The ultrasonic longitudinal wave velocity of ULE-glass samples with significantly different CTE values was measured using a correlation algorithm combined with moving-average filtering, which can achieve 0.2 m/s precision with a contribution to the ultrasonic CTE measurement uncertainty of 0.47 ppb/°C. Furthermore, the established ultrasonic CTE measurement model predicted the 5°C–35°C mean CTE with a root-mean-square error of 0.9 ppb/°C. Notably, a complete uncertainty analysis methodology was established in this paper, which can provide directional guidance for the subsequent development of higher-performance measurement devices and the improvement of relevant signal processing procedures.
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