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The HD depends on the number of lumens produced by the projector, the size of the panel(s) used, and
the type of lens installed. HD values are provided in the table below.
To protect untrained end users (such as cinema visitors or spectators), the installation shall comply with
the following installation requirements: Operators shall control access to the beam within the hazard
distance or install the product at the height that will prevent spectators from being in the hazard distance.
Radiation levels in excess of the limits will not be permitted at any point less than 2.0 meters (SH) above
any surface upon which persons other than operators, performers, or employees are permitted to stand
or less than 1.0 meter (SH) lateral separation from any place where such persons are permitted to be. In
environments where unrestrained behavior is reasonably foreseeable, the minimum separation height
should be greater than or equal to 3.0 meters to prevent potential exposure, for example by an individual
sitting on another individual’s shoulders, within the HD.
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