4. Other fields of application
This section describes a number of fields in which optronics is
playing an increasingly important role.
Thanks to their spatial coherence, it is possible to focus laser
beams at the diffraction limit, thus obtaining power or light energy
densities per unit area (illuminance or fluence) that are sufficient
to machine most materials. This capability is exploited to cut, drill,
weld or mark parts in a wide variety of industries, from automotive
to textiles.
Lasers are also widely used in the building industry, particularly
for alignment, measuring and levelling devices. Another example is
laser cleaning of monuments soiled by pollution, a less abrasive method
than sandblasting.
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Other fields of application