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日本真空理工公司制造的热常数测定装置,在瞬间加热试样时,采用输出能量为5焦耳的红宝石激光。当数焦耳的输出激光通过焦距为数厘米的透镜聚焦在试样表面时,照射面马上被加热到数千度的高温。所以激光
The thermal constant measurement apparatus manufactured by Nippon Vacuum Co., Ltd. uses a ruby laser having an output energy of 5 Joules when the sample is heated in an instant. When a few joules of the output laser is focused on the sample surface by a lens with a focal length of several centimeters, the irradiated surface is immediately heated to a high temperature of several thousand degrees. So laser