Table of Contents
Advertisement
USA market
For LIPs (Laser Illuminated Projectors) installed in the USA market other
restriction zone conditions apply.
LIPs for installation in restrained environment (cinema theaters, business
rooms, class rooms, museums ...) shall be installed at height vertically
above the floor such that the bottom plane of the hazard distance zone
shall be no lower than 2.5 meters above the floor. Horizontal clearance to
the hazard distance zone shall be not less than 1 meter. Alternatively, in
case the height of the separation barrier for the horizontal clearance is at
least 1 meter high then the horizontal clearance (SW) can be reduced to:
•
0 meter if the height of the hazard zone is minimum 2.5 meter.
•
0.1 meter if the height of the hazard zone is minimum 2.4 meter.
•
0.6 meter if the height of the hazard zone is minimum 2.2 meter.
LIPs for installations in unrestrained environment (concerts, ...) shall be
installed at a height vertically above the floor such that the bottom plane of
the Hazard distance Zone shall be no lower than 3 meters above the floor.
Horizontal clearance to the hazard distance zone shall be not less than
2.5 meters. Any human access horizontally to the Hazard Zone, if
applicable, shall be restricted by barriers. If human access is possible in
an unsupervised environment, the horizontal or vertical clearances shall
be increased to prevent exposure to the hazard distance zone.
The LIP shall be installed by Barco or by a trained and Barco-authorized
installer or shall only be transferred to laser light show variance holders.
This is applicable for dealers and distributors since they may need to
install the LIP (demo install) and/or they transfer (sell, rent, lease) the LIP.
Dealers and distributors shall preserve sales and installation records for a
period of 5 years. Variance holders may currently hold a variance for
production of Class IIIB and IV laser light shows and/or for incorporating
RG3 LIPs. Laser light show variance for RG3 LIPs can be requested by
mailing the application to RadHealthCustomerService@fda.hhs.gov.
The installation checklist for laser illuminated RG3 projectors must be fully
completed after the installation. The installation checklist can be
downloaded from the Barco website. The installer shall preserve the
checklist for a period of 5 years. A copy can remain on-site.
Install one or more readily accessible controls to immediately terminate
LIP projection light. The power input at the projector side is considered as
a reliable disconnect device. When required to switch off the projector,
disconnect the power cord at the projector side. In case the power input at
the projector side is not accessible (e. g. truss mount), the socket outlet
supplying the projector shall be installed nearby the projector and be
easily accessible, or a readily accessible general disconnect device shall
be incorporated in the fixed wiring.
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 eye 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).
RESTRICTED
RA
AREA
PR
Image 1–4
Image 1–4
TH
HD
RZ
DIFFUSE
PD
HD
REFLECTION
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
6, relevant for intrabeam exposure.
•
HD
: the distance that has to be kept restrictive related to the
reflection
reflected light from the rear projection screen.
•
HD
: the relevant distance to be considered while observing the
diffuse
diffuse surface of the rear projection screen.
As described in
"High Brightness precautions: Hazard Distance", page
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
); also taking into account a 1 meter lateral
reflection
separation.
The HD
distance equals 25% of the difference between the
reflection
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
"General considerations", page
HD
= 25% (HD – PD)
reflection
The light emitted from the screen within the observation shall never
exceed the RG2 exposure limit, determined at 10 cm. The HD
neglected if the measured light at the screen surface is below 5000 cd/m²
or 15000 LUX.
1.6 HD in function of modifying optics
Hazard distance
This projector may become Laser Product-Risk Group 3 (RG3) when
installed with lens with throw ratio greater than 2.0. Permanent eye injury
is possible when exposed to the high intensity light beam within the
hazard distance (HD).
Lens information with resolution WUXGA (0.96"):
Projec-
Risk
tion Lens
G100–W22
Group
Throw
ratio
0.38 - 2.0
RG2
2.0 - 4.0
RG3
4.0 - 7.2
RG3
7.2 - 10.8
RG3
Follow the precautions to avoid light intensity hazard.
•
NEVER look into the lens! High intensity light beam.
•
Permanent eye injury is possible when exposed to the high intensity
light beam within the hazard distance.
•
Operators shall control access to the light beam within the hazard
distance or install the product at a height that will prevent eye exposure
within the hazard distance.
•
Do not place any reflective objects in the light path of the projector.
1.7 HD calculation of multi-projector
stacks
Sometimes two or more projectors are stacked (projecting on the same
surface). In this case, because of the overlap of the images, possibly a
system Hazard Distance needs to be applied instead of a single projector
hazard distance.
Only projectors stacked along one axis (horizontal or vertical) should be
considered. Physical stacking of projectors in two dimensions (for
example 2x2), can be reduced to separate "N"x1 systems.
Safety
3.
diffuse
Hazard Distance (HD)
G100–W16, G100–
W19
NA
NA
1940 mm
1165 mm
4565 mm
4120 mm
6400 mm
6400 mm
R5913457 /09
G100
6, it
can be
7
Advertisement
Table of Contents
