ENGLISH - 7
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fi
rst!
r
Nominal Ocular Hazard Distance (GB 7247.1
－
2012)
The distance fro
m
the projection lens surface at
w
hich the bea
m
irradiance or radiant exposure reaches the
m
axi
m
u
m
per
m
issible exposure
(
MPE
)
of cornea is kno
w
n as no
m
inal ocular hazard distance
(
NOHD
)
. The area
w
here the bea
m
irradiance or radiant exposure exceeds the cornea
’
s
m
axi
m
u
m
per
m
issible exposure is kno
w
n as
no
m
inal ocular hazard area
(
NOHA
)
. Do not look into or expose skin to the projected light fro
m
inside the no
m
inal
ocular hazard area,
w
hich is
w
ithin the no
m
inal ocular hazard distance. Exposure to direct light fro
m
the projector
or diffused re
fl
ection
m
ay da
m
age the eye or skin.
NOHD
D3
D4
NOHA
NOHD
D1
D2
NOHA
Except ET-D
3
LEU
100C
, ET-D
3
LEW
200C
, ET-D75LE95
C
(
Unit:
m)
Projection lens
Model No.
NOHD
*1
D1
*2
D2
*2
D3
*2
D4
*2
ET-D
3
LEW
10C
ET-D75LE
10C
1
.
2
0
.6
4
0
.6
4
0
.69
0
.69
ET-D
3
LES
20C
ET-D75LE
20C
1
.8
0
.7
4
0
.7
4
0
.79
0
.79
ET-D
3
LET
30C
ET-D75LE
30C
4
.
0
1
.
11
1
.
11
1
.
1
9
1
.
1
9
ET-D
3
LET
40C
ET-D75LE
40C
4
.8
0
.7
0
0
.7
0
0
.75
0
.75
ET-D75LE8
6.
3
0
.58
0
.58
0
.6
2
0
.6
2
*
1
NOHD: No
m
inal Ocular Hazard Distance
*
2
The
v
alues of D
1
to D
4
w
ill change in accordance
w
ith the lens shift a
m
ount. Each
v
alue in the table is the
m
axi
m
u
m
v
alue.
Note
f
The
v
alue in the table is based on GB 7
24
7.
1
－
2012
.
