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本文从光学传递函数的概念出发推导出热象仪的最小可分辨温差的表达式,并介绍了用不同空间频率的四杆目标图案来测定热象仪的最小可分辨温差的方法.
In this paper, the expression of minimum distinguishable temperature difference of thermal imager is deduced from the concept of optical transfer function, and the method of determining the minimum resolvable temperature difference of thermal imager by four-target pattern with different spatial frequencies is introduced.