红外扫描探测系统综合性能描述和测试方法的研究

RESEARCH ON DESCRIPTIONS AND TESTING METHODS OF SYNTHETICFIGURES OF MERIT FOR IR SCANNING DETECTING SYSTEMS

以系统输出信噪比为判据，建立了系统的作用距离Ｒ、最小可分辨温差ＭＲＴＤ，最小可探测温差ＭＤＴＤ与系统的噪声等效温差ＮＥＴＤ和调制传递函数Ｈｓ之间的关系；并研究了这些性能参数的测量方法。

Taking the output signal to noise ratio ( SNR ) of systems as a criterion, the relationships among the detecting distance R , the noise equivalent temperature difference NETD , the minimal resolvable temperature difference MRTD , the minimal detectable temperature difference MDTD and the modulation transfer function of IR scanning detecting systems ( SDS ) were established. The testing methods for these figures of merit were also studied.As a result, the bases of the synthetic performance evaluation and the practical testing methods of IR SDS were provided.