for the sqfe use of lqsers - LIGO
for the sqfe use of lqsers - LIGO
for the sqfe use of lqsers - LIGO
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APPENDIX<br />
Table Bl<br />
Typical Diff<strong>use</strong> Reflection Cases <strong>for</strong> Visible Radiation (l' = 0'4 to 0'7 pm)*<br />
Pe.missible Laser Beam Radianl Exposure lncidenr on a Diff<strong>use</strong>ly<br />
Reflecting Surface, MPE x [/p(J 'cm-2]<br />
Exposure<br />
Duration, ,<br />
(r)<br />
MPE at Comeal<br />
(J sar 'cm-2)<br />
Limiting<br />
Angle, a;" + Reflectanc€ (P) = 100% Reflectance (p) = 50% Reflectance (p) = l(,{<br />
(l)<br />
(2)<br />
(3)<br />
l0-4 l.O x l0-? 8.0<br />
l0-8 2.2 x ltJ-? 5.4<br />
10-7 4.6 x l0-'<br />
17<br />
10-{ 1.0 x I0.r 2.5<br />
l0-r 2.2 x l0-'<br />
l0r<br />
t0<br />
4.6 x l(rr 2.2<br />
l I0<br />
10 to loa 22<br />
l 1.0 3.6<br />
f o-'<br />
10-<br />
2.2<br />
5.1<br />
9.2<br />
l5<br />
24<br />
| 4.6<br />
(4)<br />
3.1 x l0-2<br />
6.8x102<br />
1.5 x l0-l<br />
3.1 x l()-<br />
r<br />
6.8 x l0-l<br />
l_f<br />
3.1<br />
6,8<br />
15<br />
1t<br />
68<br />
(5)<br />
6.3 x l0-2<br />
t-4 x l0-l<br />
2.9 x lfr<br />
6.3 x l0-r<br />
1.4<br />
2.9<br />
6.3<br />
l4<br />
29<br />
63<br />
t40<br />
* For wavelengths between 0 7 and t.4 pm, <strong>use</strong> <strong>the</strong> appropriatc correction factors given in 8 5<br />
t Sec Fig. 7 <strong>for</strong> a graphic presentation <strong>of</strong> <strong>the</strong>se values.<br />
+ For extended sources, angular subtense > o min (see 8.1)<br />
72<br />
(6)<br />
3.1 x l0-r<br />
6.8 x l0'l<br />
1.5<br />
6.8<br />
l5<br />
3I<br />
68<br />
r50<br />
310<br />
680<br />
f.
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