included scanners and recorders for image transmission systems, scanners for 
readout of radar land mass transparencies, recorders for the preparation of 
radar land mass transparencies (49" x 48" in size), recorders for the direct 
recording of airborne sensor outputs, and recorders and readout devices for 
wideband electronic signals. In general, the applications have been in systems 
where CRT technology had proven to be a basic limitation when handling the 
outputs of modern reconnaissance aircraft. The laser beam technology has 
demonstrated characteristics that provide resolutions of 200 lp/mm, 30 shades 
of grey, spot positioning within 1/4 of a resolution element and operation 
at data rates of 100 MHz. 
Considering this technology as a means of input-output for a 
target recognition, change detection, or image enhancement system, as well 
as other developments that are of interest and will be pointed out, the 
following benefits to overall performance will accrue: 
a) Operation at input image resolution and dynamic range. 
b) Preservation of imagery geometrical fidelity. 
C) Operation at data rates compatible with modern computer 
system input/output rates. 
d) Outputs amenable to real time recording or display. 
The ability to scan an image and re-record it while maintaining 
resolution, dynamic range, and geometrical fidelity within the tolerances of 
the input imagery is a valuable asset when system designs are considered. 
It assures that changes in the image structure are the result of programmed 
changes, and only those changes instituted as a result of the manipulation 
of the image data to enhance target appearances, detect changes, and/or 
recognize targets. The scanning function, which heretofore has been a source