Measureing the distribution of CO2 laser beam power density using picture superposed method

In research of measureing the distribution of infrared powerful laser power density,we put forward the method of moving narrow chink sampling and pro-cessing the sampling pictures to obtain laser beam power density distribution,To raise measurement quality,we advance a method which extends survery-material's measure-ment range and raisies meassurement precision,and discuss the calibration of survery-material hot sensitive briefly,and give relevant experiment conclusion.