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为解决红外摄像法测量激光辐照度分布难以定量的问题,结合红外摄像法和量热法,提出了复合热像法的测量方案,研制了一套激光辐照度时空分布测量原理性样机,测量了2 000 W级Nd:YAG激光的辐照度分布。结果表明:利用漫反射屏上安置少量量热式激光能量探头的方式可以实现基于红外摄像法的绝对定标测量,通过红外漫反射数据与能量探头数据的归一化处理,可以得出红外激光辐照度的时空分布的定量结果。该样机系统为国内首创,并成功应用于红外强激光的辐照度定量测量。
In order to solve the problem that it is difficult to quantify the distribution of laser irradiance by infrared camera method, the measurement scheme of composite thermal imaging method is put forward by infrared imaging method and calorimetry method. A set of principle prototype of measuring spatial and temporal distribution of laser irradiance is developed. The irradiance distribution of 2 000 W Nd: YAG laser was measured. The results show that the absolute calibration measurement based on infrared imaging method can be realized by using a small amount of calorimetric laser energy probe placed on the diffuse reflection screen. By normalizing infrared diffuse reflection data and energy probe data, it can be concluded that infrared laser Quantitative results of spatial and temporal distribution of irradiance. The prototype system is the first in China and has been successfully applied to quantitatively measure the irradiance of intense infrared laser.