载波条纹图的处理及应用

本文提出一种载波条纹的处理方法，将变形前、后的载波条纹图分别经过条纹细化、抽取中心、级数编码、全场拟合等处理，首先求出全场每个像素点上的条纹级数，然后再对应相减，以得到仅仅由于变形引起的干涉条纹的全场分布，文中应用该方法分析处理了差分干涉条纹图，测量了水平热管周围的温度场、温度梯度场及壁面换热系数。

Processing For Carrier Fringe Patterns and Its Application

A new method to process the carrier fringe patterns is presented. The carrier fringe before and after deformation were thinned to locate their centers and encoded into numerical data. The value of fringe order on every pixel can be acquired by numerical surface fitting to these data. Then the two fringe order fields were subtracted each other to get the fringe order distribution caused uniquely by deformation. This method is used to process the shearing interferometry fringe patterns and measure the temperature and its gradient field in atmosphere around the horizontal heat tube. The heat transfer coefficients were also computed.