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2.6 Light beam Hazard Distance (HD)
Light beam Hazard Distance (HD) is the distance from the source at which the intensity or the energy per
surface unit becomes lower than the applicable safety limit. The light beam can be considered dangerous
if the operator is within the HD.
2.6.1 Restriction zone based on the HD
Calculation of the HD depends on the amount of lumens produced by the projector and the type of lens installed.
See next section, HD in function of the lens Throw Ratio (TR).
To protect untrained users, the following installation requirements must be complied with: light output levels in
excess of the limits shall not be permitted at any point less than 2.0 meters (SH) above any surface upon which
persons are assumed to stand or 1 meter (SW ) below or in lateral separation from any place where such persons
are assumed to be.
Based on national requirements, no person is allowed to enter the projected beam within the zone between the
projection lens and the related hazard distance (HD). This shall be made physically impossible by creating suffi-
cient separation height or by placing barriers. The minimum separation height takes into account the surface upon
which persons are assumed to stand. A typical setup is shown in the image below. A professional installed must
verify that the minimum requirements are met.
RA
TH
PR
RZ
HD
SW
1m
SW
SW
SW
HD
SH
RA
TH
RZ
SH
(B) TOP VIEW
(A) SIDE VIEW
A Side view.
B Top view.
RA Restricted Access location (boot area of projector).
PR Projector.
TH Theater.
RZ Restriction Zone in the theater.
SH Separation Height. Must be minimum 2 meter.
SW Separation Width. Must be minimum 1 meter
If required a restricted zone (RZ) in the theater must be established. This can be done using a physical barrier, for
example, a red rope as shown in the image on the next page.
Содержание Orion 1080
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