DMC Therapy Plus, User Manual, Page: 16 / 24

16
Therapy Plus | User’s Manual
CALCULATION OF BEAM DIVERGENCE
Laser Emission
Applied Standard: 60825-1:2014 / Subclause 3.13
The beam divergence for 600 µm fiber is 0,45 rad ± 0,03 rad.
CALCULATION OF MAXIMUM IRRADIANCE
Applied Standard: 60825-1:2014 / Subclause 3.43
] / [
2
m W
dA
d
E
φ
=
Maximum Power = 0,25 W
Area = 1,2 x 10
-7
m
2
E = 20 x 10
5
W/m
2
CALCULATION OF CORNEA MPE
Applied Standard: 60825-1:2014 / Table A.2
Wavelength 808 nm
2
25 , 0
2 6 4
/ 18 m W T C C E
MPE
−
=
(t > T
2
)
C
6
= 66,7
C
4
= 1,64
T
2
= 100s
E
MPE
= 610 W.m
-2
Wavelength 660 nm
2
25 , 0
2 6
/ 18 m W T C E
MPE
−
=
(t > T
2
)
C
6
= 66,7
T
2
= 100s
E
MPE
= 372,2 W.m
-2
CALCULATION OF SKIN MPE
Applied Standard: 60825-1:2014 / Table A.5
Wavelength 808 nm
2
4
2000 − = Wm C E
MPE
C
4
= 1,64
E
MPE
= 3280 W.m
-2
Wavelength 660 nm
E
MPE
= 2000 W.m
-2