In facsimile systems, the total of the areas that are actually explored by the scanning spot during the scanning of the object by the transmitter or during scanning of the record medium by the receiver. [From Weik '89]

In an imaging system, the path traversed by a scanning spot during a single line sweep.

In facsimile, the frequency at which a fixed line perpendicular to the direction of scanning is crossed by a scanning spot.
Note: The scanning line frequency is equivalent to drum speed in some mechanical systems. Synonym scanning line rate.

In facsimile systems, the total length of a scanning line, equal to the spot speed divided by the scanning line frequency.
Note: The scanning line length is usually greater than the length of the available line.

In facsimile systems, the time interval between (a) the instant at which the scanning spot probes or writes to a given spot on one scanning line, and (b) the instant at which the scanning spot probes or writes to the corresponding spot on the next scanning line.

Synonym scanning line frequency.

The distance between the centers of consecutive scanning lines.

In facsimile and television systems, the rate of displacement of the scanning spot along the scanning line.

In facsimile systems, the area on the object, i.e., the original, covered instantaneously by the pickup system of the scanner.

See scattering.