多次曝光斑纹照相用于固体线胀系数的测量

Measurement of solid linear-expand coefficient by means of multiple-exposure speckle photography

本文阐述了多次曝光斑纹照相法原理,用此法对铝等金属进行加热实验,测量了线胀系数及热效应,提高了测量精度。

The article expounds the principle of multiple-expozure speckle pholography. By means of this method, some experiments of heating metals such as aluminium are done for measuring the linear expand coefficients and the heat strains. The measurement precision is raised up.