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R5913197 /02 SP2K-S
20
1.5 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
two areas should be considered: the restricted enclosed
projection area (RA) and the observation area (TH).
RA
TH
sw
PD
HD
DIFFUSE
s
w
RZ
s
w
s
w
PR
HD
REFLECTION
RESTRICTED
AREA
R
E
S
T
R
IC
T
E
D
A
R
E
A
Image 1–3
RA
Restricted Access location (enclosed projection area).
PR
Projector.
TH
Theater (observation area).
RZ
Restriction Zone.
PD
Projection Distance.
SW
Separation Width. Must be minimum 1 meter.
For this type of setup 3 different HD shall be considered:
•
HD as discussed in
“High Brightness precautions: Hazard Distance”, page 18
, relevant for intrabeam
exposure.
•
HD
reflection
: the distance that has to be kept restrictive related to the reflected light from the rear projection
screen.
•
HD
diffuse
: the relevant distance to be considered while observing the diffuse surface of the rear projection
screen.
As described in
“High Brightness precautions: Hazard Distance”, page 18
, it is mandatory to create a
restricted zone within the beam areas closer than any HD. In the enclosed projection area the combination of
two restricted zones are relevant: The restricted zone of the projected beam toward the screen; taking into
account 1 meter Separation Width (SW) from the beam onward. Combined with the restricted zone related to
the rear reflection from the screen (HD
reflection
); also taking into account a 1 meter lateral separation.
The HD
reflection
distance equals 25% of the difference between the determined HD distance and the projection
distance to the rear projection screen. To determine the HD distance for the used lens and projector model see
chapter
“HD in function of modifying optics”, page 21
HD
reflection
= 25% (HD – PD)
The light emitted from the screen within the observation shall never exceed the RG2 exposure limit,
determined at 10 cm. The HD
diffuse
can be neglected if the measured light at the screen surface is below 5000
cd/m² or 15000 LUX.
Содержание SP2K-S
Страница 1: ...ENABLING BRIGHT OUTCOMES Installation manual SP2K S...
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Страница 8: ...R5913197 02 SP2K S 8...
Страница 22: ...R5913197 02 SP2K S 22 Safety...
Страница 28: ...R5913197 02 SP2K S 28 Image 2 4 7 Remove inner top cover and inner box two U shaped plates Getting started...
Страница 64: ...R5913197 02 SP2K S 64 Lenses Lens holder...
Страница 72: ...R5913197 02 SP2K S 72 ICMP X...
Страница 92: ...R5913197 02 SP2K S 92 ICMP X...
Страница 100: ...R5913197 02 SP2K S 100 Projector Power Cycle...
Страница 101: ...101 R5913197 02 SP2K S 9 1 Connecting to the projector for the first time 102 9 2 Software update 103 Connectivity 9...
Страница 106: ...R5913197 02 SP2K S 106 Connectivity...
Страница 112: ...R5913197 02 SP2K S 112 1 Image 10 7 Sealed cover fixation Convergence...
Страница 120: ...R5913197 02 SP2K S 120 Convergence...
Страница 130: ...R5913197 02 SP2K S 130 3 Lift up the cover and remove it reference 2 Projector covers...
Страница 144: ...R5913197 02 SP2K S 144 Projector covers...
Страница 152: ...R5913197 02 SP2K S 152 List of tools...
Страница 156: ...R5913197 02 SP2K S 156 Index...
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Страница 158: ...www barco com R5913197 02 2022 02 10...