Unwanted, minor currents or voltages in an electrical system.

Abbreviated NHZ.  The space within which the level of the direct, reflected or scattered radiation may exceed the applicable MPE. Exposure levels beyond the boundary of the NHZ are below the appropriate MPE.

Abbreviated NOHD.  The distance along the axis of an unobstructed laser beam from a laser, a fiber end, or connector to the human eye beyond which the irradiance or radiant exposure is not expected to exceed the applicable MPE.

A class of hazards that result from factors other than direct human exposure to a laser beam.

[box]Examples: electrical, resistive heating, collateral and plasma radiation, fire, robotic mechanical hazards, etc.[/box]

The subject matter or figure imaged by, or seen through, an optical system.