Hagy H E, Shirkey W D
Appl Opt. 1975 Sep 1;14(9):2099-103. doi: 10.1364/AO.14.002099.
Specific test conditions for determining ultrasonic velocities in titania-silica glasses are shown to improve the experimentally established linear correlation between velocity and thermal expansion. Finer surface finish, normalized thermal history (annealing), and controlled temperature for the test specimen improve the relationship. A statistical analysis shows that 5-35 degrees C average expansion coefficients can be accurately predicted from ultrasonic velocities with a standard deviation of 1 ppb/ degrees C. Excellent agreement is established between the ultrasonic predicted expansion and test results supplied by the University of Arizona Optical Sciences Center.
用于测定二氧化钛-二氧化硅玻璃中超声速度的特定测试条件，被证明可改善实验确定的速度与热膨胀之间的线性相关性。更精细的表面光洁度、标准化的热历史（退火）以及测试样品的温度控制，改善了这种关系。统计分析表明，平均膨胀系数在5-35摄氏度之间时，可根据超声速度准确预测，标准偏差为1 ppb/摄氏度。超声预测膨胀与亚利桑那大学光学科学中心提供的测试结果之间达成了极佳的一致性。
