分析了热像仪实际使用中视场搜索对最小可分辨温差MRTD的影响，提出了影响因素的修正公式。
The effect of field-of-view-search on the MRTD of thermal imaging systems is analyzed. A formula for the revision of MRTD is proposed.
根据技术指标的要求，对噪声等效温差、最小可分辨温差等主要参数进行了详细的分析与计算，证明了红外热成像系统设计的合理性。
According to the request of the technique, the main parameters of noise equivalent temperature difference and minimum resolvable temperature difference were analysed and calculated.
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