Understanding Infrared Thermography Reading 7 Part 2 of 2.pdf

A.3.6.1 Line Scanning
The purpose of spatial scanning is to derive information concerning the
distribution of radiant energy over a target scene. Quite often, a single straight
line scanned on the target is all that is necessary to locate a critical thermal
anomaly. The instantaneous position of the scanning element (or the position
of the element in the linear array) is controlled or sensed, so that the
radiometric output signal can be accompanied by a position signal output and
be displayed on a chart recorder, an oscilloscope, or some other recording
device.
A typical high-speed commercial line scanner develops a high-resolution
thermal map by scanning normal to the motion of a moving target, such as a
paper web or a strip steel process. The resulting output is a thermal strip map
of the process as it moves normal to the scan line (as illustrated in Figure A-
16). The output signal information is in real-time computer compatible format
and can be used to monitor, control or predict the behavior of the target.
Charlie Chong/ Fion Zhang