Abstract
In view of the surface temperature distribution and temperature rise measurement demand of metal target irradiated by high power laser, the thermosensitive phosphor surface temperature measurement technology was studied. The principle of two-color temperature measurement was introduced. After solving the key technologies of optical system optimization design, temperature distribution inversion calculation and high precision calibration, a compact thermosensitive phosphor surface temperature measuring system was developed. The temperature measurement range from room temperature to 1500 K, the space measurement range was greater than that of diameter 50mm, and the spatial resolution was better than 0.5mm. The thermosensitive phosphor surface temperature measurement technique was used to measure the surface temperature distribution and temperature rise of stainless steel targets irradiated by high power laser, and the results were compared with the results of thermocouple and numerical simulation. It is proved that the surface temperature measurement system can realize the measurement of surface temperature field distribution of high power laser irradiated target, and has high temperature measurement precision.
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