Schilling Marking Systems GmbH
In Grubenäcker 1 DE-78532 Tuttlingen
+49 (0)7461 9472-0
+49 (0)7461 9472-20
www.schilling-marking.de
MegaLight
Installation
Technical modifications reserved
7
Edition 2004
Definitions
Term
Definition
F
p
Symbol of impulse repetition frequency
Q
Symbol of energy of one impulse
P
m
Symbol of the average power of a series of impulses
Hz
Hertz, unit of measurement for frequency (1 Hz – 1 impulse/s)
J
Joule, unit of measurement for energy
W
Watt, unit of energy for power (1W = 1 joule/second)
mJ
millijoule = one thousandth of a joule
µ J
microJoule = a millionth of a joule
DO
Optical Density, the exponential to the power of 10 of optical
radiation absorption for laser protection glasses
NOHD
Nominal ocular hazard distance
λ
Symbol for wavelength (
λ
in nm)
α
Symbol for the divergence of the laser beam (
α
in mrad)
V ac
Rsm value of the alternate voltage in Volts
Note for laser parameters
The energy related to a single laser impulse is measured in microJoules. The average power of
a train of impulses is measured in Joules/second, or Watts. This average power (Watts) is
equal to the energy per impulse (Joules) multiplied by the impulse repetition frequency
(Hertz).