Nominal Ocular Hazard Distance - Christie CP42LH Installation Manual

Nominal ocular hazard distance

The installation setup must prevent access to the nominal ocular hazard area. Failure to
comply results in death or serious injury.
The nominal ocular hazard distance (NOHD) is the distance from the projector where the light
exceeds the maximum permissible exposure (MPE) on the eye and eye injuries can occur. The Skin
Nominal Hazard Zone (SNHZ) is the area where skin burns are possible. This diagram illustrates the
typical SNHZ (A), the NOHD (A + B), and the area (C) that is within permissible limits:
Hazard calculations are dependent on the number of light modules and the lens installed. This table
lists hazard distances for Christie projector lenses with the zoom adjusted to its most hazardous
position. Contact Christie support for assistance calculating hazard distances specific to your
installation.
Light
Modules
7 1.25-1.45 DLPCine HB Zoom Lens (108-274101-01)
12 1.25-1.45 DLPCine HB Zoom Lens (108-274101-01)
7 1.25-1.83 DLPCine HB Zoom Lens (108-342100-01)
12 1.25-1.83 DLPCine HB Zoom Lens (108-342100-01)
7 1.45-2.05 DLPCine HB Zoom Lens (108-335102-01)
12 1.45-2.05 DLPCine HB Zoom Lens (108-335102-01)
7 1.6-2.4 DLPCine HB Zoom Lens (108-336103-01)
12 1.6-2.4 DLPCine HB Zoom Lens (108-336103-01)
7 1.8-3.0 DLPCine HB Zoom Lens (108-337104-01)
CP42LH Installation Guide
020-101373-02 Rev. 1 (06-2015)
Projection Lens
Laser Safety Precautions
4K Extended
Throw Source
Ratio NOHD (m)
1.31:1 1.65
1.31:1 2.8
1.66:1 2.05
1.66:1 3.50
1.86:1 2.30
1.86:1 3.90
2.17:1 2.65
2.17:1 4.55
2.71:1 3.30
Skin
NHZ
(m)
0.50
0.65
0.60
0.80
0.70
0.80
0.75
1.05
0.80
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