raster scan1
chiefly Electronics
noun
A line by line scan of area by an electron beam or other scanning device to read or produce an image (on a television screen, computer monitor, etc.); an image generated by such a scan.
Origin
1950s; earliest use found in Electronics.
raster scan2
chiefly Electronics
verb
[with object] = raster.
Origin
1960s; earliest use found in Applied Physics Letters.