Читать книгу Patty's Industrial Hygiene, Physical and Biological Agents - Группа авторов - Страница 89

In commercial laser products, the laser operation is controlled by the operator through the use of a series of electronic and optical controls on the laser and its delivery system. First, there is the main power switch that energizes the laser system, a control that varies the output power, and a firing or operation switch that triggers the laser output. This may be in the form of a foot or hand switch. For many systems, the laser output may be under microprocessor control for some or all of its exposure conditions.

Stand‐by or ready switches are frequently encountered to enable the user to place the equipment in a stand‐by status to avoid accidental or unintentional firing of the laser. The standby function maintains power to the laser during workpiece preparation and allows rapid start‐up of the laser as application is needed.

A shutter to provide predetermined exposure durations may be installed to interrupt a CW laser emission. Further controls that are frequently present are a timer and a time‐interval or pulse‐duration control switch.