从实际应用出发,对机械零件在不同温度下的热膨胀量,用可调激光器发出的连续光谱经迈克尔逊干涉仪进行光学测量,光路实现简单,测量精度高,误差小,理论精度可以达到纳米量级,这对将来进行未知材料的热膨胀系数的测量及材料均匀性的评估有实际的应用价值。 Starting from the practical application, the thermal expansion of mechanical parts at different temperatures is measured by the Michelson interferometer with a continuous spectrum of tunable laser. The optical path is simple, the measurement accuracy is high, the error is small, and the theoretical accuracy can reach the nanometer level Level, which has practical application value for the future measurement of the thermal expansion coefficient of unknown materials and the evaluation of material homogeneity.