基于Kirchhoff定律 ,依照测温系统的各主要技术参数与各主要测量指标 (极限灵敏度、测温精度及测温范围 )之间的关系 ,对利用激光并采用钽酸锂热释电探测器作光电转换器件的实用化实时测温系统的工作波长进行了最优化设计。实验表明 ,在测温范围 4 0 0～ 12 0 0℃内 ,测温灵敏度及测温精度均符合设计要求。 Based on the Kirchhoff’s law, in accordance with the relationship between the main technical parameters of the temperature measurement system and the main measurement indexes (limit sensitivity, temperature measurement accuracy and temperature measurement range), the use of laser and lithium tantalate pyroelectric detector for photoelectric Conversion devices practical real-time temperature measurement system for the working wavelength of the optimal design. Experiments show that in the temperature range of 400 ~ 1200 ℃, temperature sensitivity and temperature measurement accuracy are in line with design requirements.