Panasonic PT-MW630 Operating Instructions Manual page 10

Hazard distance (IEC 62471-5)
The distance at which the level of exposure has dropped to the level of the applicable Exposure Limit Value is
known as the hazard distance or safety distance.
Do not look or stare into the light beam from a distance closer than the hazard distance (RG3 = risk group 3).
Beyond this distance the light beam is considered to be safe. (RG2 = risk group 2)
RG3 level is considered to be a hazard to the eyes from direct radiation.
RG2 level does not pose any optical hazard and can be safely used in all situations.
Hazard Distance
D1
RG2
D2
Lens
ET-ELW21
ET-ELW22
ET-ELW20
Standard Zoom Lens/
ET-ELS20
ET-ELT20
ET-ELT21
*1 Hazard Distance
*2 D1, D2, D3, and D4 change in accordance with projection lens shift amount. Each number in this table is worst case.
Note
f Each table complies with IEC 60825-1 (2014) and IEC 62471-5 (2015)
10 - ENGLISH
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HD
RG3
HD D1 max.
*1 *2
< 1.0 0.97
< 1.0 0.89
< 1.0 0.62
< 1.0 0.47
< 1.0 0.29
1.9 0.34
Hazard Distance
HD
D3
RG2 RG3
D4
D2 max. D3 max.
*2 *2
0.97 1.13
0.89 1.03
0.62 0.72
0.47 0.55
0.29 0.34
0.34 0.39
(Unit: m)
D4 max.
*2
1.13
1.03
0.72
0.55
0.34
0.39