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RESTRICTED
AREA
Image 1-2
1.6 HD for fully enclosed projection systems
HD
Hazard Distance (HD) is the distance measured from the projection lens at which the intensity or the
energy per surface unit becomes lower than the applicable exposure limit on the cornea or on the
skin. The light beam is considered (to be) unsafe for exposure if the distance from a person to the
light source is less than the HD.
Restriction Zone (RZ) based on the HD
The projector is also suitable for rear projection applications; projecting a beam onto a defuse coated
projection screen. As displayed in Image 1-3 two areas should be considered: the restricted enclosed
projection area (RA) and the observation area (TH).
Safety
R5906150 /02
XDL
19
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