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从热传导方程出发，研究了用脉冲激光进行Ｚ扫描测量时因样品线性吸收引起热效应而产生的折射率变化，所得结论同以前实验结果相符合。
Based on the heat conduction equation, the change of refractive index due to the thermal effect caused by the linear absorption of the sample during Z-scan with pulsed laser was studied. The obtained conclusion is consistent with the previous experimental results.