Thermal imaging device

摘要

A thermal imaging device (10) includes a thermal detector (50) having a linearly-arrayed plurality of spaced-apart detector elements (50'). A scene to be viewed is scanned across the detector (50) with successive fields of the scene shifted according to the spacing between adjacent detector elements (50') in order to capture image information for the entire scene by interlacing of successive scan lines from the plurality of detector elements (50'). Selected ones of the image fields from the scene are transposed relative to the plurality of detectors (50') so that a detector (50') captures the same image scan line captured by a next-adjacent detector element (50') in the plurality of detector elements (50'). Accordingly, a non-uniformity detection and correction among the plurality of detector elements (50') may be effected. Additionally, the average of all of the scan lines from all of the plurality of detector elements (50') is used as a scene-based thermal reference source for the device (10) so that an artificial powered thermal reference source for the device (10) is not necessary.