Moreover, since the beams scanned right through, it was almost as easy to conjure up views of the inside as of the out.

As the beam scanned the line, the phosphor was pushed well beyond the secondary emission threshold.

When an image is displayed on-screen, a beam of electrons scans the screen one line at a time.

The beam scanned the cliffs, then went out.

The beams scan different elevation areas, allowing the stack to cover up to 69 degrees of elevation.

To read the display, the beam scanned the tube again, this time set to a voltage very close to that of the secondary emission threshold.

This beam only scans high altitudes at long ranges.

The beam scans back and forth some 15,000 times a second, each time sending off a small electrical pulse.

The image on the screen slowly swam into focus as the tightened beam scanned across it.

A red beam scanned his eyes.