引言本文所考虑的红外搜索和监视系统能探测出在局部范围出现的、比探测器元件的瞬时视场小得多的目标。目标温度可能比平均背景热一些,或比平均背景冷一些。然而,这里将对各种情况作一般化的讨论,即包括由于目标的范围较大和光学系统的弥散,目标图象可能比 INTRODUCTION The infrared search and monitoring system considered in this paper can detect targets that appear in a local area that are much smaller than the instantaneous field of view of the detector element. The target temperature may be slightly warmer than the average background or colder than the average background. However, there will be a general discussion of the various situations involved, including due to the wide range of objectives and dispersion of the optical system, the target image may be more