With this, the scanning beam is not directed at any single spot, but moves around, so the plastic does not burn.

ECONOMIST: Recycling

To do that requires scanning the object beam through the target about a hundred different ways.

ECONOMIST: Microscopy

It works by scanning a laser beam across an object and manipulating the reflected light to produce an extremely narrow focal plane.

ECONOMIST: The Archimedes palimpsest: Eureka! | The

The data can then be read simply by scanning the disc with another laser beam.

ECONOMIST: Digital video discs

Its purpose was to create a beam of neutrons to use for scanning and testing other materials.

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