LBP2 User Guide
Document No: 50306-001
Rev G 3/12/2020
Page 91
(camera) system.
32
x y z beam axis
system
x
4.2
A second coordinate system
that defines the axes of the
laser beam.
33
E
max
(z)
H
max
(z)
maximum
power/energy
density
x
3.1.5
Maximum of the spatial
power/energy density
distribution function E(x,y,z)
/H(x,y,z) at location z.
Peak fluence.
34
(x
max ,
y
max
, z)
location of the
maximum
x
3.1.6
Location of E
max
(z)/H
max
(z)
in the x-y plane at z.
35
E
Τ
(z)
H
Τ
(z)
threshold
power/energy
density
x
3.1.7
A fraction
of the max
power/energy density at
location z.
for CW-beams:
)
(
)
(
max
z
E
z
E
for pulsed beams:
)
(
)
(
max
z
H
z
H
where:
1
0
36
P
(z)
Q
(z)
effective
power/energy
x
3.2.1
Evaluated by summing only
over locations (x,y) for
which:
E
y
x
E
)
,
(
H
y
x
H
)
,
(
37
f
(z)
fractional
power/energy
x
3.2.2
Fraction of the effective
power/energy to the total
power/energy at location z.
)
(
)
(
)
(
z
P
z
P
z
f
)
(
)
(
)
(
z
Q
z
Q
z
f
where:
1
)
(
0
z
f
38
)
,
(
y
x
centroid
position
x
3.2.2
First linear moments at
location z.
39
ξ
(z)
e(z)
beam ellipticity/
eccentricity
x
3.2.5
Method for quantifying the
circularity or squareness
(aspect ratio) of a
distribution at z.
ellipticity:
x
y
d
d
z
)
(
