应用散斑照相法测量三维非对称温度场

Speckle Photography for Measuring the 3-D Asymmetric Temperature Field

提出一种光线偏折角放大方法用于提高散斑照相测量灵敏度。应用散斑照相法测定了三维非对称温度场，通过卷积背投影公式得到了ｚ为常数的某个层面的温度分布。实验表明此方法适用于几何尺度较小或温度梯度较小的三维位相物体温度场的散斑照相测量。

A method of magnifying the deflective angle of a light beam is proposed, in which the measurement sensitivity of speckle photography can be raised. By speckle Photography, a 3-D asymmetrric temperature field for the phase object is measured. And the temperature distribution for a giving layer (z=const) is obtained by convolution backprojection algorithm. The experiment shows that this method is suitable for the measurement of the phase object with the small sectional size and the small temperature gradient.